AudioPolicyManager.cpp revision 1c9c2cc4b170b79a83433749808e286eb0fcc449 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "AudioPolicyManager"
18//#define LOG_NDEBUG 0
19
20//#define VERY_VERBOSE_LOGGING
21#ifdef VERY_VERBOSE_LOGGING
22#define ALOGVV ALOGV
23#else
24#define ALOGVV(a...) do { } while(0)
25#endif
26
27// A device mask for all audio input devices that are considered "virtual" when evaluating
28// active inputs in getActiveInput()
29#define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL  AUDIO_DEVICE_IN_REMOTE_SUBMIX
30// A device mask for all audio output devices that are considered "remote" when evaluating
31// active output devices in isStreamActiveRemotely()
32#define APM_AUDIO_OUT_DEVICE_REMOTE_ALL  AUDIO_DEVICE_OUT_REMOTE_SUBMIX
33// A device mask for all audio input and output devices where matching inputs/outputs on device
34// type alone is not enough: the address must match too
35#define APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX | \
36                                            AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
37
38#include <inttypes.h>
39#include <math.h>
40
41#include <cutils/properties.h>
42#include <utils/Log.h>
43#include <hardware/audio.h>
44#include <hardware/audio_effect.h>
45#include <media/AudioParameter.h>
46#include <soundtrigger/SoundTrigger.h>
47#include "AudioPolicyManager.h"
48#include "audio_policy_conf.h"
49
50namespace android {
51
52// ----------------------------------------------------------------------------
53// Definitions for audio_policy.conf file parsing
54// ----------------------------------------------------------------------------
55
56struct StringToEnum {
57    const char *name;
58    uint32_t value;
59};
60
61#define STRING_TO_ENUM(string) { #string, string }
62#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
63
64const StringToEnum sDeviceNameToEnumTable[] = {
65    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
66    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
67    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
68    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
69    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO),
70    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET),
71    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
72    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
73    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP),
74    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES),
75    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
76    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
77    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
78    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI),
79    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
80    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
81    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
82    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
83    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
84    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
85    STRING_TO_ENUM(AUDIO_DEVICE_OUT_TELEPHONY_TX),
86    STRING_TO_ENUM(AUDIO_DEVICE_OUT_LINE),
87    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI_ARC),
88    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPDIF),
89    STRING_TO_ENUM(AUDIO_DEVICE_OUT_FM),
90    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_LINE),
91    STRING_TO_ENUM(AUDIO_DEVICE_IN_AMBIENT),
92    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
93    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
94    STRING_TO_ENUM(AUDIO_DEVICE_IN_ALL_SCO),
95    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
96    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
97    STRING_TO_ENUM(AUDIO_DEVICE_IN_HDMI),
98    STRING_TO_ENUM(AUDIO_DEVICE_IN_TELEPHONY_RX),
99    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
100    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
101    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
102    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
103    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
104    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
105    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_DEVICE),
106    STRING_TO_ENUM(AUDIO_DEVICE_IN_FM_TUNER),
107    STRING_TO_ENUM(AUDIO_DEVICE_IN_TV_TUNER),
108    STRING_TO_ENUM(AUDIO_DEVICE_IN_LINE),
109    STRING_TO_ENUM(AUDIO_DEVICE_IN_SPDIF),
110    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_A2DP),
111    STRING_TO_ENUM(AUDIO_DEVICE_IN_LOOPBACK),
112};
113
114const StringToEnum sFlagNameToEnumTable[] = {
115    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
116    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
117    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
118    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
119    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
120    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
121    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_HW_AV_SYNC),
122};
123
124const StringToEnum sFormatNameToEnumTable[] = {
125    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
126    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
127    STRING_TO_ENUM(AUDIO_FORMAT_PCM_32_BIT),
128    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_24_BIT),
129    STRING_TO_ENUM(AUDIO_FORMAT_PCM_FLOAT),
130    STRING_TO_ENUM(AUDIO_FORMAT_PCM_24_BIT_PACKED),
131    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
132    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
133    STRING_TO_ENUM(AUDIO_FORMAT_AAC_MAIN),
134    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LC),
135    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SSR),
136    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LTP),
137    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V1),
138    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SCALABLE),
139    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ERLC),
140    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LD),
141    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V2),
142    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ELD),
143    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
144    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V1),
145    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V2),
146    STRING_TO_ENUM(AUDIO_FORMAT_OPUS),
147    STRING_TO_ENUM(AUDIO_FORMAT_AC3),
148    STRING_TO_ENUM(AUDIO_FORMAT_E_AC3),
149};
150
151const StringToEnum sOutChannelsNameToEnumTable[] = {
152    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
153    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
154    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_QUAD),
155    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
156    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
157};
158
159const StringToEnum sInChannelsNameToEnumTable[] = {
160    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
161    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
162    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
163};
164
165const StringToEnum sGainModeNameToEnumTable[] = {
166    STRING_TO_ENUM(AUDIO_GAIN_MODE_JOINT),
167    STRING_TO_ENUM(AUDIO_GAIN_MODE_CHANNELS),
168    STRING_TO_ENUM(AUDIO_GAIN_MODE_RAMP),
169};
170
171
172uint32_t AudioPolicyManager::stringToEnum(const struct StringToEnum *table,
173                                              size_t size,
174                                              const char *name)
175{
176    for (size_t i = 0; i < size; i++) {
177        if (strcmp(table[i].name, name) == 0) {
178            ALOGV("stringToEnum() found %s", table[i].name);
179            return table[i].value;
180        }
181    }
182    return 0;
183}
184
185const char *AudioPolicyManager::enumToString(const struct StringToEnum *table,
186                                              size_t size,
187                                              uint32_t value)
188{
189    for (size_t i = 0; i < size; i++) {
190        if (table[i].value == value) {
191            return table[i].name;
192        }
193    }
194    return "";
195}
196
197bool AudioPolicyManager::stringToBool(const char *value)
198{
199    return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0));
200}
201
202
203// ----------------------------------------------------------------------------
204// AudioPolicyInterface implementation
205// ----------------------------------------------------------------------------
206
207
208status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
209                                                          audio_policy_dev_state_t state,
210                                                  const char *device_address)
211{
212    String8 address = (device_address == NULL) ? String8("") : String8(device_address);
213
214    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
215            device, state, address.string());
216
217    // connect/disconnect only 1 device at a time
218    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
219
220    // handle output devices
221    if (audio_is_output_device(device)) {
222        SortedVector <audio_io_handle_t> outputs;
223
224        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
225        devDesc->mAddress = address;
226        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
227
228        // save a copy of the opened output descriptors before any output is opened or closed
229        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
230        mPreviousOutputs = mOutputs;
231        switch (state)
232        {
233        // handle output device connection
234        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
235            if (index >= 0) {
236                ALOGW("setDeviceConnectionState() device already connected: %x", device);
237                return INVALID_OPERATION;
238            }
239            ALOGV("setDeviceConnectionState() connecting device %x", device);
240
241            // register new device as available
242            index = mAvailableOutputDevices.add(devDesc);
243            if (index >= 0) {
244                sp<HwModule> module = getModuleForDevice(device);
245                if (module == 0) {
246                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
247                          device);
248                    mAvailableOutputDevices.remove(devDesc);
249                    return INVALID_OPERATION;
250                }
251                mAvailableOutputDevices[index]->mId = nextUniqueId();
252                mAvailableOutputDevices[index]->mModule = module;
253            } else {
254                return NO_MEMORY;
255            }
256
257            if (checkOutputsForDevice(devDesc, state, outputs, address) != NO_ERROR) {
258                mAvailableOutputDevices.remove(devDesc);
259                return INVALID_OPERATION;
260            }
261            // outputs should never be empty here
262            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
263                    "checkOutputsForDevice() returned no outputs but status OK");
264            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
265                  outputs.size());
266            break;
267        // handle output device disconnection
268        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
269            if (index < 0) {
270                ALOGW("setDeviceConnectionState() device not connected: %x", device);
271                return INVALID_OPERATION;
272            }
273
274            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
275
276            // Set Disconnect to HALs
277            AudioParameter param = AudioParameter(address);
278            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
279            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
280
281            // remove device from available output devices
282            mAvailableOutputDevices.remove(devDesc);
283
284            checkOutputsForDevice(devDesc, state, outputs, address);
285            } break;
286
287        default:
288            ALOGE("setDeviceConnectionState() invalid state: %x", state);
289            return BAD_VALUE;
290        }
291
292        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
293        // output is suspended before any tracks are moved to it
294        checkA2dpSuspend();
295        checkOutputForAllStrategies();
296        // outputs must be closed after checkOutputForAllStrategies() is executed
297        if (!outputs.isEmpty()) {
298            for (size_t i = 0; i < outputs.size(); i++) {
299                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
300                // close unused outputs after device disconnection or direct outputs that have been
301                // opened by checkOutputsForDevice() to query dynamic parameters
302                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
303                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
304                         (desc->mDirectOpenCount == 0))) {
305                    closeOutput(outputs[i]);
306                }
307            }
308            // check again after closing A2DP output to reset mA2dpSuspended if needed
309            checkA2dpSuspend();
310        }
311
312        updateDevicesAndOutputs();
313        if (mPhoneState == AUDIO_MODE_IN_CALL) {
314            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
315            updateCallRouting(newDevice);
316        }
317        for (size_t i = 0; i < mOutputs.size(); i++) {
318            audio_io_handle_t output = mOutputs.keyAt(i);
319            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
320                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
321                                                               true /*fromCache*/);
322                // do not force device change on duplicated output because if device is 0, it will
323                // also force a device 0 for the two outputs it is duplicated to which may override
324                // a valid device selection on those outputs.
325                bool force = !mOutputs.valueAt(i)->isDuplicated()
326                        && (!deviceDistinguishesOnAddress(device)
327                                // always force when disconnecting (a non-duplicated device)
328                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
329                setOutputDevice(output, newDevice, force, 0);
330            }
331        }
332
333        mpClientInterface->onAudioPortListUpdate();
334        return NO_ERROR;
335    }  // end if is output device
336
337    // handle input devices
338    if (audio_is_input_device(device)) {
339        SortedVector <audio_io_handle_t> inputs;
340
341        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
342        devDesc->mAddress = address;
343        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
344        switch (state)
345        {
346        // handle input device connection
347        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
348            if (index >= 0) {
349                ALOGW("setDeviceConnectionState() device already connected: %d", device);
350                return INVALID_OPERATION;
351            }
352            sp<HwModule> module = getModuleForDevice(device);
353            if (module == NULL) {
354                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
355                      device);
356                return INVALID_OPERATION;
357            }
358            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
359                return INVALID_OPERATION;
360            }
361
362            index = mAvailableInputDevices.add(devDesc);
363            if (index >= 0) {
364                mAvailableInputDevices[index]->mId = nextUniqueId();
365                mAvailableInputDevices[index]->mModule = module;
366            } else {
367                return NO_MEMORY;
368            }
369        } break;
370
371        // handle input device disconnection
372        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
373            if (index < 0) {
374                ALOGW("setDeviceConnectionState() device not connected: %d", device);
375                return INVALID_OPERATION;
376            }
377
378            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
379
380            // Set Disconnect to HALs
381            AudioParameter param = AudioParameter(address);
382            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
383            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
384
385            checkInputsForDevice(device, state, inputs, address);
386            mAvailableInputDevices.remove(devDesc);
387
388        } break;
389
390        default:
391            ALOGE("setDeviceConnectionState() invalid state: %x", state);
392            return BAD_VALUE;
393        }
394
395        closeAllInputs();
396
397        if (mPhoneState == AUDIO_MODE_IN_CALL) {
398            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
399            updateCallRouting(newDevice);
400        }
401
402        mpClientInterface->onAudioPortListUpdate();
403        return NO_ERROR;
404    } // end if is input device
405
406    ALOGW("setDeviceConnectionState() invalid device: %x", device);
407    return BAD_VALUE;
408}
409
410audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
411                                                  const char *device_address)
412{
413    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
414    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
415    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
416    ssize_t index;
417    DeviceVector *deviceVector;
418
419    if (audio_is_output_device(device)) {
420        deviceVector = &mAvailableOutputDevices;
421    } else if (audio_is_input_device(device)) {
422        deviceVector = &mAvailableInputDevices;
423    } else {
424        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
425        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
426    }
427
428    index = deviceVector->indexOf(devDesc);
429    if (index >= 0) {
430        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
431    } else {
432        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
433    }
434}
435
436void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
437{
438    bool createTxPatch = false;
439    struct audio_patch patch;
440    patch.num_sources = 1;
441    patch.num_sinks = 1;
442    status_t status;
443    audio_patch_handle_t afPatchHandle;
444    DeviceVector deviceList;
445
446    audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
447    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
448
449    // release existing RX patch if any
450    if (mCallRxPatch != 0) {
451        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
452        mCallRxPatch.clear();
453    }
454    // release TX patch if any
455    if (mCallTxPatch != 0) {
456        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
457        mCallTxPatch.clear();
458    }
459
460    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
461    // via setOutputDevice() on primary output.
462    // Otherwise, create two audio patches for TX and RX path.
463    if (availablePrimaryOutputDevices() & rxDevice) {
464        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
465        // If the TX device is also on the primary HW module, setOutputDevice() will take care
466        // of it due to legacy implementation. If not, create a patch.
467        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
468                == AUDIO_DEVICE_NONE) {
469            createTxPatch = true;
470        }
471    } else {
472        // create RX path audio patch
473        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
474        ALOG_ASSERT(!deviceList.isEmpty(),
475                    "updateCallRouting() selected device not in output device list");
476        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
477        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
478        ALOG_ASSERT(!deviceList.isEmpty(),
479                    "updateCallRouting() no telephony RX device");
480        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
481
482        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
483        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
484
485        // request to reuse existing output stream if one is already opened to reach the RX device
486        SortedVector<audio_io_handle_t> outputs =
487                                getOutputsForDevice(rxDevice, mOutputs);
488        audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
489        if (output != AUDIO_IO_HANDLE_NONE) {
490            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
491            ALOG_ASSERT(!outputDesc->isDuplicated(),
492                        "updateCallRouting() RX device output is duplicated");
493            outputDesc->toAudioPortConfig(&patch.sources[1]);
494            patch.num_sources = 2;
495        }
496
497        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
498        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
499        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
500                                               status);
501        if (status == NO_ERROR) {
502            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
503                                       &patch, mUidCached);
504            mCallRxPatch->mAfPatchHandle = afPatchHandle;
505            mCallRxPatch->mUid = mUidCached;
506        }
507        createTxPatch = true;
508    }
509    if (createTxPatch) {
510
511        struct audio_patch patch;
512        patch.num_sources = 1;
513        patch.num_sinks = 1;
514        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
515        ALOG_ASSERT(!deviceList.isEmpty(),
516                    "updateCallRouting() selected device not in input device list");
517        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
518        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
519        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
520        ALOG_ASSERT(!deviceList.isEmpty(),
521                    "updateCallRouting() no telephony TX device");
522        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
523        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
524
525        SortedVector<audio_io_handle_t> outputs =
526                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
527        audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
528        // request to reuse existing output stream if one is already opened to reach the TX
529        // path output device
530        if (output != AUDIO_IO_HANDLE_NONE) {
531            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
532            ALOG_ASSERT(!outputDesc->isDuplicated(),
533                        "updateCallRouting() RX device output is duplicated");
534            outputDesc->toAudioPortConfig(&patch.sources[1]);
535            patch.num_sources = 2;
536        }
537
538        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
539        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
540        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
541                                               status);
542        if (status == NO_ERROR) {
543            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
544                                       &patch, mUidCached);
545            mCallTxPatch->mAfPatchHandle = afPatchHandle;
546            mCallTxPatch->mUid = mUidCached;
547        }
548    }
549}
550
551void AudioPolicyManager::setPhoneState(audio_mode_t state)
552{
553    ALOGV("setPhoneState() state %d", state);
554    if (state < 0 || state >= AUDIO_MODE_CNT) {
555        ALOGW("setPhoneState() invalid state %d", state);
556        return;
557    }
558
559    if (state == mPhoneState ) {
560        ALOGW("setPhoneState() setting same state %d", state);
561        return;
562    }
563
564    // if leaving call state, handle special case of active streams
565    // pertaining to sonification strategy see handleIncallSonification()
566    if (isInCall()) {
567        ALOGV("setPhoneState() in call state management: new state is %d", state);
568        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
569            handleIncallSonification((audio_stream_type_t)stream, false, true);
570        }
571    }
572
573    // store previous phone state for management of sonification strategy below
574    int oldState = mPhoneState;
575    mPhoneState = state;
576    bool force = false;
577
578    // are we entering or starting a call
579    if (!isStateInCall(oldState) && isStateInCall(state)) {
580        ALOGV("  Entering call in setPhoneState()");
581        // force routing command to audio hardware when starting a call
582        // even if no device change is needed
583        force = true;
584        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
585            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
586                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
587        }
588    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
589        ALOGV("  Exiting call in setPhoneState()");
590        // force routing command to audio hardware when exiting a call
591        // even if no device change is needed
592        force = true;
593        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
594            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
595                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
596        }
597    } else if (isStateInCall(state) && (state != oldState)) {
598        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
599        // force routing command to audio hardware when switching between telephony and VoIP
600        // even if no device change is needed
601        force = true;
602    }
603
604    // check for device and output changes triggered by new phone state
605    checkA2dpSuspend();
606    checkOutputForAllStrategies();
607    updateDevicesAndOutputs();
608
609    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
610
611    int delayMs = 0;
612    if (isStateInCall(state)) {
613        nsecs_t sysTime = systemTime();
614        for (size_t i = 0; i < mOutputs.size(); i++) {
615            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
616            // mute media and sonification strategies and delay device switch by the largest
617            // latency of any output where either strategy is active.
618            // This avoid sending the ring tone or music tail into the earpiece or headset.
619            if ((desc->isStrategyActive(STRATEGY_MEDIA,
620                                     SONIFICATION_HEADSET_MUSIC_DELAY,
621                                     sysTime) ||
622                    desc->isStrategyActive(STRATEGY_SONIFICATION,
623                                         SONIFICATION_HEADSET_MUSIC_DELAY,
624                                         sysTime)) &&
625                    (delayMs < (int)desc->mLatency*2)) {
626                delayMs = desc->mLatency*2;
627            }
628            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
629            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
630                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
631            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
632            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
633                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
634        }
635    }
636
637    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
638    // the device returned is not necessarily reachable via this output
639    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
640    // force routing command to audio hardware when ending call
641    // even if no device change is needed
642    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
643        rxDevice = hwOutputDesc->device();
644    }
645
646    if (state == AUDIO_MODE_IN_CALL) {
647        updateCallRouting(rxDevice, delayMs);
648    } else if (oldState == AUDIO_MODE_IN_CALL) {
649        if (mCallRxPatch != 0) {
650            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
651            mCallRxPatch.clear();
652        }
653        if (mCallTxPatch != 0) {
654            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
655            mCallTxPatch.clear();
656        }
657        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
658    } else {
659        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
660    }
661    // if entering in call state, handle special case of active streams
662    // pertaining to sonification strategy see handleIncallSonification()
663    if (isStateInCall(state)) {
664        ALOGV("setPhoneState() in call state management: new state is %d", state);
665        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
666            handleIncallSonification((audio_stream_type_t)stream, true, true);
667        }
668    }
669
670    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
671    if (state == AUDIO_MODE_RINGTONE &&
672        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
673        mLimitRingtoneVolume = true;
674    } else {
675        mLimitRingtoneVolume = false;
676    }
677}
678
679void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
680                                         audio_policy_forced_cfg_t config)
681{
682    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
683
684    bool forceVolumeReeval = false;
685    switch(usage) {
686    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
687        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
688            config != AUDIO_POLICY_FORCE_NONE) {
689            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
690            return;
691        }
692        forceVolumeReeval = true;
693        mForceUse[usage] = config;
694        break;
695    case AUDIO_POLICY_FORCE_FOR_MEDIA:
696        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
697            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
698            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
699            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
700            config != AUDIO_POLICY_FORCE_NO_BT_A2DP) {
701            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
702            return;
703        }
704        mForceUse[usage] = config;
705        break;
706    case AUDIO_POLICY_FORCE_FOR_RECORD:
707        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
708            config != AUDIO_POLICY_FORCE_NONE) {
709            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
710            return;
711        }
712        mForceUse[usage] = config;
713        break;
714    case AUDIO_POLICY_FORCE_FOR_DOCK:
715        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
716            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
717            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
718            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
719            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
720            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
721        }
722        forceVolumeReeval = true;
723        mForceUse[usage] = config;
724        break;
725    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
726        if (config != AUDIO_POLICY_FORCE_NONE &&
727            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
728            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
729        }
730        forceVolumeReeval = true;
731        mForceUse[usage] = config;
732        break;
733    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
734        if (config != AUDIO_POLICY_FORCE_NONE &&
735            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
736            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
737        }
738        mForceUse[usage] = config;
739        break;
740    default:
741        ALOGW("setForceUse() invalid usage %d", usage);
742        break;
743    }
744
745    // check for device and output changes triggered by new force usage
746    checkA2dpSuspend();
747    checkOutputForAllStrategies();
748    updateDevicesAndOutputs();
749    if (mPhoneState == AUDIO_MODE_IN_CALL) {
750        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
751        updateCallRouting(newDevice);
752    }
753    for (size_t i = 0; i < mOutputs.size(); i++) {
754        audio_io_handle_t output = mOutputs.keyAt(i);
755        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
756        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
757            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
758        }
759        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
760            applyStreamVolumes(output, newDevice, 0, true);
761        }
762    }
763
764    audio_io_handle_t activeInput = getActiveInput();
765    if (activeInput != 0) {
766        setInputDevice(activeInput, getNewInputDevice(activeInput));
767    }
768
769}
770
771audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
772{
773    return mForceUse[usage];
774}
775
776void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
777{
778    ALOGV("setSystemProperty() property %s, value %s", property, value);
779}
780
781// Find a direct output profile compatible with the parameters passed, even if the input flags do
782// not explicitly request a direct output
783sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
784                                                               audio_devices_t device,
785                                                               uint32_t samplingRate,
786                                                               audio_format_t format,
787                                                               audio_channel_mask_t channelMask,
788                                                               audio_output_flags_t flags)
789{
790    for (size_t i = 0; i < mHwModules.size(); i++) {
791        if (mHwModules[i]->mHandle == 0) {
792            continue;
793        }
794        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
795            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
796            bool found = profile->isCompatibleProfile(device, samplingRate,
797                    NULL /*updatedSamplingRate*/, format, channelMask,
798                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
799                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
800            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
801                return profile;
802            }
803        }
804    }
805    return 0;
806}
807
808audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
809                                    uint32_t samplingRate,
810                                    audio_format_t format,
811                                    audio_channel_mask_t channelMask,
812                                    audio_output_flags_t flags,
813                                    const audio_offload_info_t *offloadInfo)
814{
815
816    routing_strategy strategy = getStrategy(stream);
817    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
818    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
819          device, stream, samplingRate, format, channelMask, flags);
820
821    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
822            offloadInfo);
823}
824
825audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
826                                    uint32_t samplingRate,
827                                    audio_format_t format,
828                                    audio_channel_mask_t channelMask,
829                                    audio_output_flags_t flags,
830                                    const audio_offload_info_t *offloadInfo)
831{
832    if (attr == NULL) {
833        ALOGE("getOutputForAttr() called with NULL audio attributes");
834        return 0;
835    }
836    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
837            attr->usage, attr->content_type, attr->tags, attr->flags);
838
839    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
840    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
841    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
842
843    if ((attr->flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
844        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
845    }
846
847    ALOGV("getOutputForAttr() device %d, samplingRate %d, format %x, channelMask %x, flags %x",
848          device, samplingRate, format, channelMask, flags);
849
850    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
851    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
852                offloadInfo);
853}
854
855audio_io_handle_t AudioPolicyManager::getOutputForDevice(
856        audio_devices_t device,
857        audio_stream_type_t stream,
858        uint32_t samplingRate,
859        audio_format_t format,
860        audio_channel_mask_t channelMask,
861        audio_output_flags_t flags,
862        const audio_offload_info_t *offloadInfo)
863{
864    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
865    uint32_t latency = 0;
866    status_t status;
867
868#ifdef AUDIO_POLICY_TEST
869    if (mCurOutput != 0) {
870        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
871                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
872
873        if (mTestOutputs[mCurOutput] == 0) {
874            ALOGV("getOutput() opening test output");
875            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
876            outputDesc->mDevice = mTestDevice;
877            outputDesc->mLatency = mTestLatencyMs;
878            outputDesc->mFlags =
879                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
880            outputDesc->mRefCount[stream] = 0;
881            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
882            config.sample_rate = mTestSamplingRate;
883            config.channel_mask = mTestChannels;
884            config.format = mTestFormat;
885            if (offloadInfo != NULL) {
886                config.offload_info = *offloadInfo;
887            }
888            status = mpClientInterface->openOutput(0,
889                                                  &mTestOutputs[mCurOutput],
890                                                  &config,
891                                                  &outputDesc->mDevice,
892                                                  String8(""),
893                                                  &outputDesc->mLatency,
894                                                  outputDesc->mFlags);
895            if (status == NO_ERROR) {
896                outputDesc->mSamplingRate = config.sample_rate;
897                outputDesc->mFormat = config.format;
898                outputDesc->mChannelMask = config.channel_mask;
899                AudioParameter outputCmd = AudioParameter();
900                outputCmd.addInt(String8("set_id"),mCurOutput);
901                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
902                addOutput(mTestOutputs[mCurOutput], outputDesc);
903            }
904        }
905        return mTestOutputs[mCurOutput];
906    }
907#endif //AUDIO_POLICY_TEST
908
909    // open a direct output if required by specified parameters
910    //force direct flag if offload flag is set: offloading implies a direct output stream
911    // and all common behaviors are driven by checking only the direct flag
912    // this should normally be set appropriately in the policy configuration file
913    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
914        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
915    }
916    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
917        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
918    }
919
920    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
921    // creating an offloaded track and tearing it down immediately after start when audioflinger
922    // detects there is an active non offloadable effect.
923    // FIXME: We should check the audio session here but we do not have it in this context.
924    // This may prevent offloading in rare situations where effects are left active by apps
925    // in the background.
926    sp<IOProfile> profile;
927    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
928            !isNonOffloadableEffectEnabled()) {
929        profile = getProfileForDirectOutput(device,
930                                           samplingRate,
931                                           format,
932                                           channelMask,
933                                           (audio_output_flags_t)flags);
934    }
935
936    if (profile != 0) {
937        sp<AudioOutputDescriptor> outputDesc = NULL;
938
939        for (size_t i = 0; i < mOutputs.size(); i++) {
940            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
941            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
942                outputDesc = desc;
943                // reuse direct output if currently open and configured with same parameters
944                if ((samplingRate == outputDesc->mSamplingRate) &&
945                        (format == outputDesc->mFormat) &&
946                        (channelMask == outputDesc->mChannelMask)) {
947                    outputDesc->mDirectOpenCount++;
948                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
949                    return mOutputs.keyAt(i);
950                }
951            }
952        }
953        // close direct output if currently open and configured with different parameters
954        if (outputDesc != NULL) {
955            closeOutput(outputDesc->mIoHandle);
956        }
957        outputDesc = new AudioOutputDescriptor(profile);
958        outputDesc->mDevice = device;
959        outputDesc->mLatency = 0;
960        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
961        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
962        config.sample_rate = samplingRate;
963        config.channel_mask = channelMask;
964        config.format = format;
965        if (offloadInfo != NULL) {
966            config.offload_info = *offloadInfo;
967        }
968        status = mpClientInterface->openOutput(profile->mModule->mHandle,
969                                               &output,
970                                               &config,
971                                               &outputDesc->mDevice,
972                                               String8(""),
973                                               &outputDesc->mLatency,
974                                               outputDesc->mFlags);
975
976        // only accept an output with the requested parameters
977        if (status != NO_ERROR ||
978            (samplingRate != 0 && samplingRate != config.sample_rate) ||
979            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
980            (channelMask != 0 && channelMask != config.channel_mask)) {
981            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
982                    "format %d %d, channelMask %04x %04x", output, samplingRate,
983                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
984                    outputDesc->mChannelMask);
985            if (output != AUDIO_IO_HANDLE_NONE) {
986                mpClientInterface->closeOutput(output);
987            }
988            return AUDIO_IO_HANDLE_NONE;
989        }
990        outputDesc->mSamplingRate = config.sample_rate;
991        outputDesc->mChannelMask = config.channel_mask;
992        outputDesc->mFormat = config.format;
993        outputDesc->mRefCount[stream] = 0;
994        outputDesc->mStopTime[stream] = 0;
995        outputDesc->mDirectOpenCount = 1;
996
997        audio_io_handle_t srcOutput = getOutputForEffect();
998        addOutput(output, outputDesc);
999        audio_io_handle_t dstOutput = getOutputForEffect();
1000        if (dstOutput == output) {
1001            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1002        }
1003        mPreviousOutputs = mOutputs;
1004        ALOGV("getOutput() returns new direct output %d", output);
1005        mpClientInterface->onAudioPortListUpdate();
1006        return output;
1007    }
1008
1009    // ignoring channel mask due to downmix capability in mixer
1010
1011    // open a non direct output
1012
1013    // for non direct outputs, only PCM is supported
1014    if (audio_is_linear_pcm(format)) {
1015        // get which output is suitable for the specified stream. The actual
1016        // routing change will happen when startOutput() will be called
1017        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1018
1019        output = selectOutput(outputs, flags);
1020    }
1021    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1022            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1023
1024    ALOGV("getOutput() returns output %d", output);
1025
1026    return output;
1027}
1028
1029audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1030                                                       audio_output_flags_t flags)
1031{
1032    // select one output among several that provide a path to a particular device or set of
1033    // devices (the list was previously build by getOutputsForDevice()).
1034    // The priority is as follows:
1035    // 1: the output with the highest number of requested policy flags
1036    // 2: the primary output
1037    // 3: the first output in the list
1038
1039    if (outputs.size() == 0) {
1040        return 0;
1041    }
1042    if (outputs.size() == 1) {
1043        return outputs[0];
1044    }
1045
1046    int maxCommonFlags = 0;
1047    audio_io_handle_t outputFlags = 0;
1048    audio_io_handle_t outputPrimary = 0;
1049
1050    for (size_t i = 0; i < outputs.size(); i++) {
1051        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1052        if (!outputDesc->isDuplicated()) {
1053            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1054            if (commonFlags > maxCommonFlags) {
1055                outputFlags = outputs[i];
1056                maxCommonFlags = commonFlags;
1057                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1058            }
1059            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1060                outputPrimary = outputs[i];
1061            }
1062        }
1063    }
1064
1065    if (outputFlags != 0) {
1066        return outputFlags;
1067    }
1068    if (outputPrimary != 0) {
1069        return outputPrimary;
1070    }
1071
1072    return outputs[0];
1073}
1074
1075status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1076                                             audio_stream_type_t stream,
1077                                             int session)
1078{
1079    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1080    ssize_t index = mOutputs.indexOfKey(output);
1081    if (index < 0) {
1082        ALOGW("startOutput() unknown output %d", output);
1083        return BAD_VALUE;
1084    }
1085
1086    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1087
1088    // increment usage count for this stream on the requested output:
1089    // NOTE that the usage count is the same for duplicated output and hardware output which is
1090    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1091    outputDesc->changeRefCount(stream, 1);
1092
1093    if (outputDesc->mRefCount[stream] == 1) {
1094        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1095        routing_strategy strategy = getStrategy(stream);
1096        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1097                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
1098        uint32_t waitMs = 0;
1099        bool force = false;
1100        for (size_t i = 0; i < mOutputs.size(); i++) {
1101            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1102            if (desc != outputDesc) {
1103                // force a device change if any other output is managed by the same hw
1104                // module and has a current device selection that differs from selected device.
1105                // In this case, the audio HAL must receive the new device selection so that it can
1106                // change the device currently selected by the other active output.
1107                if (outputDesc->sharesHwModuleWith(desc) &&
1108                    desc->device() != newDevice) {
1109                    force = true;
1110                }
1111                // wait for audio on other active outputs to be presented when starting
1112                // a notification so that audio focus effect can propagate.
1113                uint32_t latency = desc->latency();
1114                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1115                    waitMs = latency;
1116                }
1117            }
1118        }
1119        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1120
1121        // handle special case for sonification while in call
1122        if (isInCall()) {
1123            handleIncallSonification(stream, true, false);
1124        }
1125
1126        // apply volume rules for current stream and device if necessary
1127        checkAndSetVolume(stream,
1128                          mStreams[stream].getVolumeIndex(newDevice),
1129                          output,
1130                          newDevice);
1131
1132        // update the outputs if starting an output with a stream that can affect notification
1133        // routing
1134        handleNotificationRoutingForStream(stream);
1135        if (waitMs > muteWaitMs) {
1136            usleep((waitMs - muteWaitMs) * 2 * 1000);
1137        }
1138    }
1139    return NO_ERROR;
1140}
1141
1142
1143status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1144                                            audio_stream_type_t stream,
1145                                            int session)
1146{
1147    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1148    ssize_t index = mOutputs.indexOfKey(output);
1149    if (index < 0) {
1150        ALOGW("stopOutput() unknown output %d", output);
1151        return BAD_VALUE;
1152    }
1153
1154    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1155
1156    // handle special case for sonification while in call
1157    if (isInCall()) {
1158        handleIncallSonification(stream, false, false);
1159    }
1160
1161    if (outputDesc->mRefCount[stream] > 0) {
1162        // decrement usage count of this stream on the output
1163        outputDesc->changeRefCount(stream, -1);
1164        // store time at which the stream was stopped - see isStreamActive()
1165        if (outputDesc->mRefCount[stream] == 0) {
1166            outputDesc->mStopTime[stream] = systemTime();
1167            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1168            // delay the device switch by twice the latency because stopOutput() is executed when
1169            // the track stop() command is received and at that time the audio track buffer can
1170            // still contain data that needs to be drained. The latency only covers the audio HAL
1171            // and kernel buffers. Also the latency does not always include additional delay in the
1172            // audio path (audio DSP, CODEC ...)
1173            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1174
1175            // force restoring the device selection on other active outputs if it differs from the
1176            // one being selected for this output
1177            for (size_t i = 0; i < mOutputs.size(); i++) {
1178                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1179                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1180                if (curOutput != output &&
1181                        desc->isActive() &&
1182                        outputDesc->sharesHwModuleWith(desc) &&
1183                        (newDevice != desc->device())) {
1184                    setOutputDevice(curOutput,
1185                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1186                                    true,
1187                                    outputDesc->mLatency*2);
1188                }
1189            }
1190            // update the outputs if stopping one with a stream that can affect notification routing
1191            handleNotificationRoutingForStream(stream);
1192        }
1193        return NO_ERROR;
1194    } else {
1195        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1196        return INVALID_OPERATION;
1197    }
1198}
1199
1200void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1201{
1202    ALOGV("releaseOutput() %d", output);
1203    ssize_t index = mOutputs.indexOfKey(output);
1204    if (index < 0) {
1205        ALOGW("releaseOutput() releasing unknown output %d", output);
1206        return;
1207    }
1208
1209#ifdef AUDIO_POLICY_TEST
1210    int testIndex = testOutputIndex(output);
1211    if (testIndex != 0) {
1212        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1213        if (outputDesc->isActive()) {
1214            mpClientInterface->closeOutput(output);
1215            mOutputs.removeItem(output);
1216            mTestOutputs[testIndex] = 0;
1217        }
1218        return;
1219    }
1220#endif //AUDIO_POLICY_TEST
1221
1222    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1223    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1224        if (desc->mDirectOpenCount <= 0) {
1225            ALOGW("releaseOutput() invalid open count %d for output %d",
1226                                                              desc->mDirectOpenCount, output);
1227            return;
1228        }
1229        if (--desc->mDirectOpenCount == 0) {
1230            closeOutput(output);
1231            // If effects where present on the output, audioflinger moved them to the primary
1232            // output by default: move them back to the appropriate output.
1233            audio_io_handle_t dstOutput = getOutputForEffect();
1234            if (dstOutput != mPrimaryOutput) {
1235                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1236            }
1237            mpClientInterface->onAudioPortListUpdate();
1238        }
1239    }
1240}
1241
1242
1243audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1244                                    uint32_t samplingRate,
1245                                    audio_format_t format,
1246                                    audio_channel_mask_t channelMask,
1247                                    audio_session_t session,
1248                                    audio_input_flags_t flags)
1249{
1250    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, session %d, "
1251          "flags %#x",
1252          inputSource, samplingRate, format, channelMask, session, flags);
1253
1254    audio_devices_t device = getDeviceForInputSource(inputSource);
1255
1256    if (device == AUDIO_DEVICE_NONE) {
1257        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1258        return AUDIO_IO_HANDLE_NONE;
1259    }
1260
1261    // adapt channel selection to input source
1262    switch (inputSource) {
1263    case AUDIO_SOURCE_VOICE_UPLINK:
1264        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1265        break;
1266    case AUDIO_SOURCE_VOICE_DOWNLINK:
1267        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1268        break;
1269    case AUDIO_SOURCE_VOICE_CALL:
1270        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1271        break;
1272    default:
1273        break;
1274    }
1275
1276    sp<IOProfile> profile = getInputProfile(device,
1277                                         samplingRate,
1278                                         format,
1279                                         channelMask,
1280                                         flags);
1281    if (profile == 0) {
1282        ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1283                "channelMask 0x%X, flags %#x",
1284                device, samplingRate, format, channelMask, flags);
1285        return AUDIO_IO_HANDLE_NONE;
1286    }
1287
1288    if (profile->mModule->mHandle == 0) {
1289        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1290        return AUDIO_IO_HANDLE_NONE;
1291    }
1292
1293    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1294    config.sample_rate = samplingRate;
1295    config.channel_mask = channelMask;
1296    config.format = format;
1297    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1298
1299    bool isSoundTrigger = false;
1300    audio_source_t halInputSource = inputSource;
1301    if (inputSource == AUDIO_SOURCE_HOTWORD) {
1302        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1303        if (index >= 0) {
1304            input = mSoundTriggerSessions.valueFor(session);
1305            isSoundTrigger = true;
1306            ALOGV("SoundTrigger capture on session %d input %d", session, input);
1307        } else {
1308            halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1309        }
1310    }
1311    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1312                                                   &input,
1313                                                   &config,
1314                                                   &device,
1315                                                   String8(""),
1316                                                   halInputSource,
1317                                                   flags);
1318
1319    // only accept input with the exact requested set of parameters
1320    if (status != NO_ERROR ||
1321        (samplingRate != config.sample_rate) ||
1322        (format != config.format) ||
1323        (channelMask != config.channel_mask)) {
1324        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1325                samplingRate, format, channelMask);
1326        if (input != AUDIO_IO_HANDLE_NONE) {
1327            mpClientInterface->closeInput(input);
1328        }
1329        return AUDIO_IO_HANDLE_NONE;
1330    }
1331
1332    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1333    inputDesc->mInputSource = inputSource;
1334    inputDesc->mRefCount = 0;
1335    inputDesc->mOpenRefCount = 1;
1336    inputDesc->mSamplingRate = samplingRate;
1337    inputDesc->mFormat = format;
1338    inputDesc->mChannelMask = channelMask;
1339    inputDesc->mDevice = device;
1340    inputDesc->mSessions.add(session);
1341    inputDesc->mIsSoundTrigger = isSoundTrigger;
1342
1343    addInput(input, inputDesc);
1344    mpClientInterface->onAudioPortListUpdate();
1345    return input;
1346}
1347
1348status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1349                                        audio_session_t session)
1350{
1351    ALOGV("startInput() input %d", input);
1352    ssize_t index = mInputs.indexOfKey(input);
1353    if (index < 0) {
1354        ALOGW("startInput() unknown input %d", input);
1355        return BAD_VALUE;
1356    }
1357    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1358
1359    index = inputDesc->mSessions.indexOf(session);
1360    if (index < 0) {
1361        ALOGW("startInput() unknown session %d on input %d", session, input);
1362        return BAD_VALUE;
1363    }
1364
1365    // virtual input devices are compatible with other input devices
1366    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1367
1368        // for a non-virtual input device, check if there is another (non-virtual) active input
1369        audio_io_handle_t activeInput = getActiveInput();
1370        if (activeInput != 0 && activeInput != input) {
1371
1372            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1373            // otherwise the active input continues and the new input cannot be started.
1374            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1375            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1376                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1377                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1378                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1379            } else {
1380                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1381                return INVALID_OPERATION;
1382            }
1383        }
1384    }
1385
1386    if (inputDesc->mRefCount == 0) {
1387        if (activeInputsCount() == 0) {
1388            SoundTrigger::setCaptureState(true);
1389        }
1390        setInputDevice(input, getNewInputDevice(input), true /* force */);
1391
1392        // Automatically enable the remote submix output when input is started.
1393        // For remote submix (a virtual device), we open only one input per capture request.
1394        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1395            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1396                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1397        }
1398    }
1399
1400    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1401
1402    inputDesc->mRefCount++;
1403    return NO_ERROR;
1404}
1405
1406status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1407                                       audio_session_t session)
1408{
1409    ALOGV("stopInput() input %d", input);
1410    ssize_t index = mInputs.indexOfKey(input);
1411    if (index < 0) {
1412        ALOGW("stopInput() unknown input %d", input);
1413        return BAD_VALUE;
1414    }
1415    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1416
1417    index = inputDesc->mSessions.indexOf(session);
1418    if (index < 0) {
1419        ALOGW("stopInput() unknown session %d on input %d", session, input);
1420        return BAD_VALUE;
1421    }
1422
1423    if (inputDesc->mRefCount == 0) {
1424        ALOGW("stopInput() input %d already stopped", input);
1425        return INVALID_OPERATION;
1426    }
1427
1428    inputDesc->mRefCount--;
1429    if (inputDesc->mRefCount == 0) {
1430
1431        // automatically disable the remote submix output when input is stopped
1432        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1433            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1434                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1435        }
1436
1437        resetInputDevice(input);
1438
1439        if (activeInputsCount() == 0) {
1440            SoundTrigger::setCaptureState(false);
1441        }
1442    }
1443    return NO_ERROR;
1444}
1445
1446void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1447                                      audio_session_t session)
1448{
1449    ALOGV("releaseInput() %d", input);
1450    ssize_t index = mInputs.indexOfKey(input);
1451    if (index < 0) {
1452        ALOGW("releaseInput() releasing unknown input %d", input);
1453        return;
1454    }
1455    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1456    ALOG_ASSERT(inputDesc != 0);
1457
1458    index = inputDesc->mSessions.indexOf(session);
1459    if (index < 0) {
1460        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1461        return;
1462    }
1463    inputDesc->mSessions.remove(session);
1464    if (inputDesc->mOpenRefCount == 0) {
1465        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1466        return;
1467    }
1468    inputDesc->mOpenRefCount--;
1469    if (inputDesc->mOpenRefCount > 0) {
1470        ALOGV("releaseInput() exit > 0");
1471        return;
1472    }
1473
1474    closeInput(input);
1475    mpClientInterface->onAudioPortListUpdate();
1476    ALOGV("releaseInput() exit");
1477}
1478
1479void AudioPolicyManager::closeAllInputs() {
1480    bool patchRemoved = false;
1481
1482    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1483        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1484        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1485        if (patch_index >= 0) {
1486            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1487            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1488            mAudioPatches.removeItemsAt(patch_index);
1489            patchRemoved = true;
1490        }
1491        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1492    }
1493    mInputs.clear();
1494    nextAudioPortGeneration();
1495
1496    if (patchRemoved) {
1497        mpClientInterface->onAudioPatchListUpdate();
1498    }
1499}
1500
1501void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1502                                            int indexMin,
1503                                            int indexMax)
1504{
1505    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1506    if (indexMin < 0 || indexMin >= indexMax) {
1507        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1508        return;
1509    }
1510    mStreams[stream].mIndexMin = indexMin;
1511    mStreams[stream].mIndexMax = indexMax;
1512}
1513
1514status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1515                                                      int index,
1516                                                      audio_devices_t device)
1517{
1518
1519    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1520        return BAD_VALUE;
1521    }
1522    if (!audio_is_output_device(device)) {
1523        return BAD_VALUE;
1524    }
1525
1526    // Force max volume if stream cannot be muted
1527    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1528
1529    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1530          stream, device, index);
1531
1532    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1533    // clear all device specific values
1534    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1535        mStreams[stream].mIndexCur.clear();
1536    }
1537    mStreams[stream].mIndexCur.add(device, index);
1538
1539    // compute and apply stream volume on all outputs according to connected device
1540    status_t status = NO_ERROR;
1541    for (size_t i = 0; i < mOutputs.size(); i++) {
1542        audio_devices_t curDevice =
1543                getDeviceForVolume(mOutputs.valueAt(i)->device());
1544        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1545            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1546            if (volStatus != NO_ERROR) {
1547                status = volStatus;
1548            }
1549        }
1550    }
1551    return status;
1552}
1553
1554status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1555                                                      int *index,
1556                                                      audio_devices_t device)
1557{
1558    if (index == NULL) {
1559        return BAD_VALUE;
1560    }
1561    if (!audio_is_output_device(device)) {
1562        return BAD_VALUE;
1563    }
1564    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1565    // the strategy the stream belongs to.
1566    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1567        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1568    }
1569    device = getDeviceForVolume(device);
1570
1571    *index =  mStreams[stream].getVolumeIndex(device);
1572    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1573    return NO_ERROR;
1574}
1575
1576audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1577                                            const SortedVector<audio_io_handle_t>& outputs)
1578{
1579    // select one output among several suitable for global effects.
1580    // The priority is as follows:
1581    // 1: An offloaded output. If the effect ends up not being offloadable,
1582    //    AudioFlinger will invalidate the track and the offloaded output
1583    //    will be closed causing the effect to be moved to a PCM output.
1584    // 2: A deep buffer output
1585    // 3: the first output in the list
1586
1587    if (outputs.size() == 0) {
1588        return 0;
1589    }
1590
1591    audio_io_handle_t outputOffloaded = 0;
1592    audio_io_handle_t outputDeepBuffer = 0;
1593
1594    for (size_t i = 0; i < outputs.size(); i++) {
1595        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1596        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1597        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1598            outputOffloaded = outputs[i];
1599        }
1600        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1601            outputDeepBuffer = outputs[i];
1602        }
1603    }
1604
1605    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1606          outputOffloaded, outputDeepBuffer);
1607    if (outputOffloaded != 0) {
1608        return outputOffloaded;
1609    }
1610    if (outputDeepBuffer != 0) {
1611        return outputDeepBuffer;
1612    }
1613
1614    return outputs[0];
1615}
1616
1617audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1618{
1619    // apply simple rule where global effects are attached to the same output as MUSIC streams
1620
1621    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1622    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1623    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1624
1625    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1626    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1627          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1628
1629    return output;
1630}
1631
1632status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1633                                audio_io_handle_t io,
1634                                uint32_t strategy,
1635                                int session,
1636                                int id)
1637{
1638    ssize_t index = mOutputs.indexOfKey(io);
1639    if (index < 0) {
1640        index = mInputs.indexOfKey(io);
1641        if (index < 0) {
1642            ALOGW("registerEffect() unknown io %d", io);
1643            return INVALID_OPERATION;
1644        }
1645    }
1646
1647    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1648        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1649                desc->name, desc->memoryUsage);
1650        return INVALID_OPERATION;
1651    }
1652    mTotalEffectsMemory += desc->memoryUsage;
1653    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1654            desc->name, io, strategy, session, id);
1655    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1656
1657    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1658    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1659    effectDesc->mIo = io;
1660    effectDesc->mStrategy = (routing_strategy)strategy;
1661    effectDesc->mSession = session;
1662    effectDesc->mEnabled = false;
1663
1664    mEffects.add(id, effectDesc);
1665
1666    return NO_ERROR;
1667}
1668
1669status_t AudioPolicyManager::unregisterEffect(int id)
1670{
1671    ssize_t index = mEffects.indexOfKey(id);
1672    if (index < 0) {
1673        ALOGW("unregisterEffect() unknown effect ID %d", id);
1674        return INVALID_OPERATION;
1675    }
1676
1677    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1678
1679    setEffectEnabled(effectDesc, false);
1680
1681    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1682        ALOGW("unregisterEffect() memory %d too big for total %d",
1683                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1684        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1685    }
1686    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1687    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1688            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1689
1690    mEffects.removeItem(id);
1691
1692    return NO_ERROR;
1693}
1694
1695status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1696{
1697    ssize_t index = mEffects.indexOfKey(id);
1698    if (index < 0) {
1699        ALOGW("unregisterEffect() unknown effect ID %d", id);
1700        return INVALID_OPERATION;
1701    }
1702
1703    return setEffectEnabled(mEffects.valueAt(index), enabled);
1704}
1705
1706status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1707{
1708    if (enabled == effectDesc->mEnabled) {
1709        ALOGV("setEffectEnabled(%s) effect already %s",
1710             enabled?"true":"false", enabled?"enabled":"disabled");
1711        return INVALID_OPERATION;
1712    }
1713
1714    if (enabled) {
1715        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1716            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1717                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1718            return INVALID_OPERATION;
1719        }
1720        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1721        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1722    } else {
1723        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1724            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1725                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1726            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1727        }
1728        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1729        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1730    }
1731    effectDesc->mEnabled = enabled;
1732    return NO_ERROR;
1733}
1734
1735bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1736{
1737    for (size_t i = 0; i < mEffects.size(); i++) {
1738        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1739        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1740                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1741            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1742                  effectDesc->mDesc.name, effectDesc->mSession);
1743            return true;
1744        }
1745    }
1746    return false;
1747}
1748
1749bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1750{
1751    nsecs_t sysTime = systemTime();
1752    for (size_t i = 0; i < mOutputs.size(); i++) {
1753        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1754        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1755            return true;
1756        }
1757    }
1758    return false;
1759}
1760
1761bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1762                                                    uint32_t inPastMs) const
1763{
1764    nsecs_t sysTime = systemTime();
1765    for (size_t i = 0; i < mOutputs.size(); i++) {
1766        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1767        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1768                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1769            return true;
1770        }
1771    }
1772    return false;
1773}
1774
1775bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1776{
1777    for (size_t i = 0; i < mInputs.size(); i++) {
1778        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1779        if ((inputDescriptor->mInputSource == (int)source ||
1780                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1781                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1782             && (inputDescriptor->mRefCount > 0)) {
1783            return true;
1784        }
1785    }
1786    return false;
1787}
1788
1789
1790status_t AudioPolicyManager::dump(int fd)
1791{
1792    const size_t SIZE = 256;
1793    char buffer[SIZE];
1794    String8 result;
1795
1796    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1797    result.append(buffer);
1798
1799    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1800    result.append(buffer);
1801    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1802    result.append(buffer);
1803    snprintf(buffer, SIZE, " Force use for communications %d\n",
1804             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1805    result.append(buffer);
1806    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1807    result.append(buffer);
1808    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1809    result.append(buffer);
1810    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1811    result.append(buffer);
1812    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1813    result.append(buffer);
1814    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1815            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1816    result.append(buffer);
1817
1818    snprintf(buffer, SIZE, " Available output devices:\n");
1819    result.append(buffer);
1820    write(fd, result.string(), result.size());
1821    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1822        mAvailableOutputDevices[i]->dump(fd, 2, i);
1823    }
1824    snprintf(buffer, SIZE, "\n Available input devices:\n");
1825    write(fd, buffer, strlen(buffer));
1826    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1827        mAvailableInputDevices[i]->dump(fd, 2, i);
1828    }
1829
1830    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1831    write(fd, buffer, strlen(buffer));
1832    for (size_t i = 0; i < mHwModules.size(); i++) {
1833        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1834        write(fd, buffer, strlen(buffer));
1835        mHwModules[i]->dump(fd);
1836    }
1837
1838    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1839    write(fd, buffer, strlen(buffer));
1840    for (size_t i = 0; i < mOutputs.size(); i++) {
1841        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1842        write(fd, buffer, strlen(buffer));
1843        mOutputs.valueAt(i)->dump(fd);
1844    }
1845
1846    snprintf(buffer, SIZE, "\nInputs dump:\n");
1847    write(fd, buffer, strlen(buffer));
1848    for (size_t i = 0; i < mInputs.size(); i++) {
1849        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1850        write(fd, buffer, strlen(buffer));
1851        mInputs.valueAt(i)->dump(fd);
1852    }
1853
1854    snprintf(buffer, SIZE, "\nStreams dump:\n");
1855    write(fd, buffer, strlen(buffer));
1856    snprintf(buffer, SIZE,
1857             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1858    write(fd, buffer, strlen(buffer));
1859    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1860        snprintf(buffer, SIZE, " %02zu      ", i);
1861        write(fd, buffer, strlen(buffer));
1862        mStreams[i].dump(fd);
1863    }
1864
1865    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1866            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1867    write(fd, buffer, strlen(buffer));
1868
1869    snprintf(buffer, SIZE, "Registered effects:\n");
1870    write(fd, buffer, strlen(buffer));
1871    for (size_t i = 0; i < mEffects.size(); i++) {
1872        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1873        write(fd, buffer, strlen(buffer));
1874        mEffects.valueAt(i)->dump(fd);
1875    }
1876
1877    snprintf(buffer, SIZE, "\nAudio Patches:\n");
1878    write(fd, buffer, strlen(buffer));
1879    for (size_t i = 0; i < mAudioPatches.size(); i++) {
1880        mAudioPatches[i]->dump(fd, 2, i);
1881    }
1882
1883    return NO_ERROR;
1884}
1885
1886// This function checks for the parameters which can be offloaded.
1887// This can be enhanced depending on the capability of the DSP and policy
1888// of the system.
1889bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1890{
1891    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1892     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1893     offloadInfo.sample_rate, offloadInfo.channel_mask,
1894     offloadInfo.format,
1895     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1896     offloadInfo.has_video);
1897
1898    // Check if offload has been disabled
1899    char propValue[PROPERTY_VALUE_MAX];
1900    if (property_get("audio.offload.disable", propValue, "0")) {
1901        if (atoi(propValue) != 0) {
1902            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1903            return false;
1904        }
1905    }
1906
1907    // Check if stream type is music, then only allow offload as of now.
1908    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1909    {
1910        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1911        return false;
1912    }
1913
1914    //TODO: enable audio offloading with video when ready
1915    if (offloadInfo.has_video)
1916    {
1917        ALOGV("isOffloadSupported: has_video == true, returning false");
1918        return false;
1919    }
1920
1921    //If duration is less than minimum value defined in property, return false
1922    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1923        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1924            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1925            return false;
1926        }
1927    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1928        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1929        return false;
1930    }
1931
1932    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1933    // creating an offloaded track and tearing it down immediately after start when audioflinger
1934    // detects there is an active non offloadable effect.
1935    // FIXME: We should check the audio session here but we do not have it in this context.
1936    // This may prevent offloading in rare situations where effects are left active by apps
1937    // in the background.
1938    if (isNonOffloadableEffectEnabled()) {
1939        return false;
1940    }
1941
1942    // See if there is a profile to support this.
1943    // AUDIO_DEVICE_NONE
1944    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1945                                            offloadInfo.sample_rate,
1946                                            offloadInfo.format,
1947                                            offloadInfo.channel_mask,
1948                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1949    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1950    return (profile != 0);
1951}
1952
1953status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1954                                            audio_port_type_t type,
1955                                            unsigned int *num_ports,
1956                                            struct audio_port *ports,
1957                                            unsigned int *generation)
1958{
1959    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1960            generation == NULL) {
1961        return BAD_VALUE;
1962    }
1963    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1964    if (ports == NULL) {
1965        *num_ports = 0;
1966    }
1967
1968    size_t portsWritten = 0;
1969    size_t portsMax = *num_ports;
1970    *num_ports = 0;
1971    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1972        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1973            for (size_t i = 0;
1974                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1975                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1976            }
1977            *num_ports += mAvailableOutputDevices.size();
1978        }
1979        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1980            for (size_t i = 0;
1981                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1982                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1983            }
1984            *num_ports += mAvailableInputDevices.size();
1985        }
1986    }
1987    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1988        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1989            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1990                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1991            }
1992            *num_ports += mInputs.size();
1993        }
1994        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1995            size_t numOutputs = 0;
1996            for (size_t i = 0; i < mOutputs.size(); i++) {
1997                if (!mOutputs[i]->isDuplicated()) {
1998                    numOutputs++;
1999                    if (portsWritten < portsMax) {
2000                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2001                    }
2002                }
2003            }
2004            *num_ports += numOutputs;
2005        }
2006    }
2007    *generation = curAudioPortGeneration();
2008    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2009    return NO_ERROR;
2010}
2011
2012status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2013{
2014    return NO_ERROR;
2015}
2016
2017sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2018                                                                    audio_port_handle_t id) const
2019{
2020    sp<AudioOutputDescriptor> outputDesc = NULL;
2021    for (size_t i = 0; i < mOutputs.size(); i++) {
2022        outputDesc = mOutputs.valueAt(i);
2023        if (outputDesc->mId == id) {
2024            break;
2025        }
2026    }
2027    return outputDesc;
2028}
2029
2030sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2031                                                                    audio_port_handle_t id) const
2032{
2033    sp<AudioInputDescriptor> inputDesc = NULL;
2034    for (size_t i = 0; i < mInputs.size(); i++) {
2035        inputDesc = mInputs.valueAt(i);
2036        if (inputDesc->mId == id) {
2037            break;
2038        }
2039    }
2040    return inputDesc;
2041}
2042
2043sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2044                                                                    audio_devices_t device) const
2045{
2046    sp <HwModule> module;
2047
2048    for (size_t i = 0; i < mHwModules.size(); i++) {
2049        if (mHwModules[i]->mHandle == 0) {
2050            continue;
2051        }
2052        if (audio_is_output_device(device)) {
2053            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2054            {
2055                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2056                    return mHwModules[i];
2057                }
2058            }
2059        } else {
2060            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2061                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2062                        device & ~AUDIO_DEVICE_BIT_IN) {
2063                    return mHwModules[i];
2064                }
2065            }
2066        }
2067    }
2068    return module;
2069}
2070
2071sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2072{
2073    sp <HwModule> module;
2074
2075    for (size_t i = 0; i < mHwModules.size(); i++)
2076    {
2077        if (strcmp(mHwModules[i]->mName, name) == 0) {
2078            return mHwModules[i];
2079        }
2080    }
2081    return module;
2082}
2083
2084audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2085{
2086    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2087    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2088    return devices & mAvailableOutputDevices.types();
2089}
2090
2091audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2092{
2093    audio_module_handle_t primaryHandle =
2094                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2095    audio_devices_t devices = AUDIO_DEVICE_NONE;
2096    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2097        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2098            devices |= mAvailableInputDevices[i]->mDeviceType;
2099        }
2100    }
2101    return devices;
2102}
2103
2104status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2105                                               audio_patch_handle_t *handle,
2106                                               uid_t uid)
2107{
2108    ALOGV("createAudioPatch()");
2109
2110    if (handle == NULL || patch == NULL) {
2111        return BAD_VALUE;
2112    }
2113    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2114
2115    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2116            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2117        return BAD_VALUE;
2118    }
2119    // only one source per audio patch supported for now
2120    if (patch->num_sources > 1) {
2121        return INVALID_OPERATION;
2122    }
2123
2124    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2125        return INVALID_OPERATION;
2126    }
2127    for (size_t i = 0; i < patch->num_sinks; i++) {
2128        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2129            return INVALID_OPERATION;
2130        }
2131    }
2132
2133    sp<AudioPatch> patchDesc;
2134    ssize_t index = mAudioPatches.indexOfKey(*handle);
2135
2136    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2137                                                           patch->sources[0].role,
2138                                                           patch->sources[0].type);
2139#if LOG_NDEBUG == 0
2140    for (size_t i = 0; i < patch->num_sinks; i++) {
2141        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2142                                                             patch->sinks[i].role,
2143                                                             patch->sinks[i].type);
2144    }
2145#endif
2146
2147    if (index >= 0) {
2148        patchDesc = mAudioPatches.valueAt(index);
2149        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2150                                                                  mUidCached, patchDesc->mUid, uid);
2151        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2152            return INVALID_OPERATION;
2153        }
2154    } else {
2155        *handle = 0;
2156    }
2157
2158    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2159        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2160        if (outputDesc == NULL) {
2161            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2162            return BAD_VALUE;
2163        }
2164        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2165                                                outputDesc->mIoHandle);
2166        if (patchDesc != 0) {
2167            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2168                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2169                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2170                return BAD_VALUE;
2171            }
2172        }
2173        DeviceVector devices;
2174        for (size_t i = 0; i < patch->num_sinks; i++) {
2175            // Only support mix to devices connection
2176            // TODO add support for mix to mix connection
2177            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2178                ALOGV("createAudioPatch() source mix but sink is not a device");
2179                return INVALID_OPERATION;
2180            }
2181            sp<DeviceDescriptor> devDesc =
2182                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2183            if (devDesc == 0) {
2184                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2185                return BAD_VALUE;
2186            }
2187
2188            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2189                                                           patch->sources[0].sample_rate,
2190                                                         NULL,  // updatedSamplingRate
2191                                                         patch->sources[0].format,
2192                                                         patch->sources[0].channel_mask,
2193                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2194                ALOGV("createAudioPatch() profile not supported for device %08x",
2195                      devDesc->mDeviceType);
2196                return INVALID_OPERATION;
2197            }
2198            devices.add(devDesc);
2199        }
2200        if (devices.size() == 0) {
2201            return INVALID_OPERATION;
2202        }
2203
2204        // TODO: reconfigure output format and channels here
2205        ALOGV("createAudioPatch() setting device %08x on output %d",
2206              devices.types(), outputDesc->mIoHandle);
2207        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2208        index = mAudioPatches.indexOfKey(*handle);
2209        if (index >= 0) {
2210            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2211                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2212            }
2213            patchDesc = mAudioPatches.valueAt(index);
2214            patchDesc->mUid = uid;
2215            ALOGV("createAudioPatch() success");
2216        } else {
2217            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2218            return INVALID_OPERATION;
2219        }
2220    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2221        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2222            // input device to input mix connection
2223            // only one sink supported when connecting an input device to a mix
2224            if (patch->num_sinks > 1) {
2225                return INVALID_OPERATION;
2226            }
2227            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2228            if (inputDesc == NULL) {
2229                return BAD_VALUE;
2230            }
2231            if (patchDesc != 0) {
2232                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2233                    return BAD_VALUE;
2234                }
2235            }
2236            sp<DeviceDescriptor> devDesc =
2237                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2238            if (devDesc == 0) {
2239                return BAD_VALUE;
2240            }
2241
2242            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2243                                                         patch->sinks[0].sample_rate,
2244                                                         NULL, /*updatedSampleRate*/
2245                                                         patch->sinks[0].format,
2246                                                         patch->sinks[0].channel_mask,
2247                                                         // FIXME for the parameter type,
2248                                                         // and the NONE
2249                                                         (audio_output_flags_t)
2250                                                            AUDIO_INPUT_FLAG_NONE)) {
2251                return INVALID_OPERATION;
2252            }
2253            // TODO: reconfigure output format and channels here
2254            ALOGV("createAudioPatch() setting device %08x on output %d",
2255                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2256            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2257            index = mAudioPatches.indexOfKey(*handle);
2258            if (index >= 0) {
2259                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2260                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2261                }
2262                patchDesc = mAudioPatches.valueAt(index);
2263                patchDesc->mUid = uid;
2264                ALOGV("createAudioPatch() success");
2265            } else {
2266                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2267                return INVALID_OPERATION;
2268            }
2269        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2270            // device to device connection
2271            if (patchDesc != 0) {
2272                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2273                    return BAD_VALUE;
2274                }
2275            }
2276            sp<DeviceDescriptor> srcDeviceDesc =
2277                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2278
2279            //update source and sink with our own data as the data passed in the patch may
2280            // be incomplete.
2281            struct audio_patch newPatch = *patch;
2282            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2283            if (srcDeviceDesc == 0) {
2284                return BAD_VALUE;
2285            }
2286
2287            for (size_t i = 0; i < patch->num_sinks; i++) {
2288                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2289                    ALOGV("createAudioPatch() source device but one sink is not a device");
2290                    return INVALID_OPERATION;
2291                }
2292
2293                sp<DeviceDescriptor> sinkDeviceDesc =
2294                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2295                if (sinkDeviceDesc == 0) {
2296                    return BAD_VALUE;
2297                }
2298                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2299
2300                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2301                    // only one sink supported when connected devices across HW modules
2302                    if (patch->num_sinks > 1) {
2303                        return INVALID_OPERATION;
2304                    }
2305                    SortedVector<audio_io_handle_t> outputs =
2306                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2307                                                                mOutputs);
2308                    // if the sink device is reachable via an opened output stream, request to go via
2309                    // this output stream by adding a second source to the patch description
2310                    audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
2311                    if (output != AUDIO_IO_HANDLE_NONE) {
2312                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2313                        if (outputDesc->isDuplicated()) {
2314                            return INVALID_OPERATION;
2315                        }
2316                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2317                        newPatch.num_sources = 2;
2318                    }
2319                }
2320            }
2321            // TODO: check from routing capabilities in config file and other conflicting patches
2322
2323            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2324            if (index >= 0) {
2325                afPatchHandle = patchDesc->mAfPatchHandle;
2326            }
2327
2328            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2329                                                                  &afPatchHandle,
2330                                                                  0);
2331            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2332                                                                  status, afPatchHandle);
2333            if (status == NO_ERROR) {
2334                if (index < 0) {
2335                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2336                                               &newPatch, uid);
2337                    addAudioPatch(patchDesc->mHandle, patchDesc);
2338                } else {
2339                    patchDesc->mPatch = newPatch;
2340                }
2341                patchDesc->mAfPatchHandle = afPatchHandle;
2342                *handle = patchDesc->mHandle;
2343                nextAudioPortGeneration();
2344                mpClientInterface->onAudioPatchListUpdate();
2345            } else {
2346                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2347                status);
2348                return INVALID_OPERATION;
2349            }
2350        } else {
2351            return BAD_VALUE;
2352        }
2353    } else {
2354        return BAD_VALUE;
2355    }
2356    return NO_ERROR;
2357}
2358
2359status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2360                                                  uid_t uid)
2361{
2362    ALOGV("releaseAudioPatch() patch %d", handle);
2363
2364    ssize_t index = mAudioPatches.indexOfKey(handle);
2365
2366    if (index < 0) {
2367        return BAD_VALUE;
2368    }
2369    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2370    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2371          mUidCached, patchDesc->mUid, uid);
2372    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2373        return INVALID_OPERATION;
2374    }
2375
2376    struct audio_patch *patch = &patchDesc->mPatch;
2377    patchDesc->mUid = mUidCached;
2378    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2379        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2380        if (outputDesc == NULL) {
2381            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2382            return BAD_VALUE;
2383        }
2384
2385        setOutputDevice(outputDesc->mIoHandle,
2386                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2387                       true,
2388                       0,
2389                       NULL);
2390    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2391        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2392            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2393            if (inputDesc == NULL) {
2394                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2395                return BAD_VALUE;
2396            }
2397            setInputDevice(inputDesc->mIoHandle,
2398                           getNewInputDevice(inputDesc->mIoHandle),
2399                           true,
2400                           NULL);
2401        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2402            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2403            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2404            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2405                                                              status, patchDesc->mAfPatchHandle);
2406            removeAudioPatch(patchDesc->mHandle);
2407            nextAudioPortGeneration();
2408            mpClientInterface->onAudioPatchListUpdate();
2409        } else {
2410            return BAD_VALUE;
2411        }
2412    } else {
2413        return BAD_VALUE;
2414    }
2415    return NO_ERROR;
2416}
2417
2418status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2419                                              struct audio_patch *patches,
2420                                              unsigned int *generation)
2421{
2422    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2423            generation == NULL) {
2424        return BAD_VALUE;
2425    }
2426    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2427          *num_patches, patches, mAudioPatches.size());
2428    if (patches == NULL) {
2429        *num_patches = 0;
2430    }
2431
2432    size_t patchesWritten = 0;
2433    size_t patchesMax = *num_patches;
2434    for (size_t i = 0;
2435            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2436        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2437        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2438        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2439              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2440    }
2441    *num_patches = mAudioPatches.size();
2442
2443    *generation = curAudioPortGeneration();
2444    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2445    return NO_ERROR;
2446}
2447
2448status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2449{
2450    ALOGV("setAudioPortConfig()");
2451
2452    if (config == NULL) {
2453        return BAD_VALUE;
2454    }
2455    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2456    // Only support gain configuration for now
2457    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2458        return INVALID_OPERATION;
2459    }
2460
2461    sp<AudioPortConfig> audioPortConfig;
2462    if (config->type == AUDIO_PORT_TYPE_MIX) {
2463        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2464            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2465            if (outputDesc == NULL) {
2466                return BAD_VALUE;
2467            }
2468            ALOG_ASSERT(!outputDesc->isDuplicated(),
2469                        "setAudioPortConfig() called on duplicated output %d",
2470                        outputDesc->mIoHandle);
2471            audioPortConfig = outputDesc;
2472        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2473            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2474            if (inputDesc == NULL) {
2475                return BAD_VALUE;
2476            }
2477            audioPortConfig = inputDesc;
2478        } else {
2479            return BAD_VALUE;
2480        }
2481    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2482        sp<DeviceDescriptor> deviceDesc;
2483        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2484            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2485        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2486            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2487        } else {
2488            return BAD_VALUE;
2489        }
2490        if (deviceDesc == NULL) {
2491            return BAD_VALUE;
2492        }
2493        audioPortConfig = deviceDesc;
2494    } else {
2495        return BAD_VALUE;
2496    }
2497
2498    struct audio_port_config backupConfig;
2499    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2500    if (status == NO_ERROR) {
2501        struct audio_port_config newConfig;
2502        audioPortConfig->toAudioPortConfig(&newConfig, config);
2503        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2504    }
2505    if (status != NO_ERROR) {
2506        audioPortConfig->applyAudioPortConfig(&backupConfig);
2507    }
2508
2509    return status;
2510}
2511
2512void AudioPolicyManager::clearAudioPatches(uid_t uid)
2513{
2514    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2515        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2516        if (patchDesc->mUid == uid) {
2517            // releaseAudioPatch() removes the patch from mAudioPatches
2518            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2519                i--;
2520            }
2521        }
2522    }
2523}
2524
2525status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2526                                       audio_io_handle_t *ioHandle,
2527                                       audio_devices_t *device)
2528{
2529    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2530    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2531    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2532
2533    mSoundTriggerSessions.add(*session, *ioHandle);
2534
2535    return NO_ERROR;
2536}
2537
2538status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2539{
2540    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2541    if (index < 0) {
2542        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2543        return BAD_VALUE;
2544    }
2545
2546    mSoundTriggerSessions.removeItem(session);
2547    return NO_ERROR;
2548}
2549
2550status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2551                                           const sp<AudioPatch>& patch)
2552{
2553    ssize_t index = mAudioPatches.indexOfKey(handle);
2554
2555    if (index >= 0) {
2556        ALOGW("addAudioPatch() patch %d already in", handle);
2557        return ALREADY_EXISTS;
2558    }
2559    mAudioPatches.add(handle, patch);
2560    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2561            "sink handle %d",
2562          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2563          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2564    return NO_ERROR;
2565}
2566
2567status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2568{
2569    ssize_t index = mAudioPatches.indexOfKey(handle);
2570
2571    if (index < 0) {
2572        ALOGW("removeAudioPatch() patch %d not in", handle);
2573        return ALREADY_EXISTS;
2574    }
2575    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2576                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2577    mAudioPatches.removeItemsAt(index);
2578    return NO_ERROR;
2579}
2580
2581// ----------------------------------------------------------------------------
2582// AudioPolicyManager
2583// ----------------------------------------------------------------------------
2584
2585uint32_t AudioPolicyManager::nextUniqueId()
2586{
2587    return android_atomic_inc(&mNextUniqueId);
2588}
2589
2590uint32_t AudioPolicyManager::nextAudioPortGeneration()
2591{
2592    return android_atomic_inc(&mAudioPortGeneration);
2593}
2594
2595AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2596    :
2597#ifdef AUDIO_POLICY_TEST
2598    Thread(false),
2599#endif //AUDIO_POLICY_TEST
2600    mPrimaryOutput((audio_io_handle_t)0),
2601    mPhoneState(AUDIO_MODE_NORMAL),
2602    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2603    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2604    mA2dpSuspended(false),
2605    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2606    mAudioPortGeneration(1)
2607{
2608    mUidCached = getuid();
2609    mpClientInterface = clientInterface;
2610
2611    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2612        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2613    }
2614
2615    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2616    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2617        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2618            ALOGE("could not load audio policy configuration file, setting defaults");
2619            defaultAudioPolicyConfig();
2620        }
2621    }
2622    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2623
2624    // must be done after reading the policy
2625    initializeVolumeCurves();
2626
2627    // open all output streams needed to access attached devices
2628    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2629    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2630    for (size_t i = 0; i < mHwModules.size(); i++) {
2631        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2632        if (mHwModules[i]->mHandle == 0) {
2633            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2634            continue;
2635        }
2636        // open all output streams needed to access attached devices
2637        // except for direct output streams that are only opened when they are actually
2638        // required by an app.
2639        // This also validates mAvailableOutputDevices list
2640        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2641        {
2642            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2643
2644            if (outProfile->mSupportedDevices.isEmpty()) {
2645                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2646                continue;
2647            }
2648
2649            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2650            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2651                profileType = mDefaultOutputDevice->mDeviceType;
2652            } else {
2653                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2654            }
2655            if ((profileType & outputDeviceTypes) &&
2656                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2657                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2658
2659                outputDesc->mDevice = profileType;
2660                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2661                config.sample_rate = outputDesc->mSamplingRate;
2662                config.channel_mask = outputDesc->mChannelMask;
2663                config.format = outputDesc->mFormat;
2664                audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2665                status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2666                                                                &output,
2667                                                                &config,
2668                                                                &outputDesc->mDevice,
2669                                                                String8(""),
2670                                                                &outputDesc->mLatency,
2671                                                                outputDesc->mFlags);
2672
2673                if (status != NO_ERROR) {
2674                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2675                          outputDesc->mDevice,
2676                          mHwModules[i]->mName);
2677                } else {
2678                    outputDesc->mSamplingRate = config.sample_rate;
2679                    outputDesc->mChannelMask = config.channel_mask;
2680                    outputDesc->mFormat = config.format;
2681
2682                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2683                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2684                        ssize_t index =
2685                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2686                        // give a valid ID to an attached device once confirmed it is reachable
2687                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2688                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2689                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2690                        }
2691                    }
2692                    if (mPrimaryOutput == 0 &&
2693                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2694                        mPrimaryOutput = output;
2695                    }
2696                    addOutput(output, outputDesc);
2697                    setOutputDevice(output,
2698                                    outputDesc->mDevice,
2699                                    true);
2700                }
2701            }
2702        }
2703        // open input streams needed to access attached devices to validate
2704        // mAvailableInputDevices list
2705        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2706        {
2707            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2708
2709            if (inProfile->mSupportedDevices.isEmpty()) {
2710                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2711                continue;
2712            }
2713
2714            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2715            if (profileType & inputDeviceTypes) {
2716                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2717
2718                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2719                inputDesc->mDevice = profileType;
2720
2721                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2722                config.sample_rate = inputDesc->mSamplingRate;
2723                config.channel_mask = inputDesc->mChannelMask;
2724                config.format = inputDesc->mFormat;
2725                audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2726                status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2727                                                               &input,
2728                                                               &config,
2729                                                               &inputDesc->mDevice,
2730                                                               String8(""),
2731                                                               AUDIO_SOURCE_MIC,
2732                                                               AUDIO_INPUT_FLAG_NONE);
2733
2734                if (status == NO_ERROR) {
2735                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2736                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2737                        ssize_t index =
2738                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2739                        // give a valid ID to an attached device once confirmed it is reachable
2740                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2741                            mAvailableInputDevices[index]->mId = nextUniqueId();
2742                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2743                        }
2744                    }
2745                    mpClientInterface->closeInput(input);
2746                } else {
2747                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2748                          inputDesc->mDevice,
2749                          mHwModules[i]->mName);
2750                }
2751            }
2752        }
2753    }
2754    // make sure all attached devices have been allocated a unique ID
2755    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2756        if (mAvailableOutputDevices[i]->mId == 0) {
2757            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2758            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2759            continue;
2760        }
2761        i++;
2762    }
2763    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2764        if (mAvailableInputDevices[i]->mId == 0) {
2765            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2766            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2767            continue;
2768        }
2769        i++;
2770    }
2771    // make sure default device is reachable
2772    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2773        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2774    }
2775
2776    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2777
2778    updateDevicesAndOutputs();
2779
2780#ifdef AUDIO_POLICY_TEST
2781    if (mPrimaryOutput != 0) {
2782        AudioParameter outputCmd = AudioParameter();
2783        outputCmd.addInt(String8("set_id"), 0);
2784        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2785
2786        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2787        mTestSamplingRate = 44100;
2788        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2789        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2790        mTestLatencyMs = 0;
2791        mCurOutput = 0;
2792        mDirectOutput = false;
2793        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2794            mTestOutputs[i] = 0;
2795        }
2796
2797        const size_t SIZE = 256;
2798        char buffer[SIZE];
2799        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2800        run(buffer, ANDROID_PRIORITY_AUDIO);
2801    }
2802#endif //AUDIO_POLICY_TEST
2803}
2804
2805AudioPolicyManager::~AudioPolicyManager()
2806{
2807#ifdef AUDIO_POLICY_TEST
2808    exit();
2809#endif //AUDIO_POLICY_TEST
2810   for (size_t i = 0; i < mOutputs.size(); i++) {
2811        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2812   }
2813   for (size_t i = 0; i < mInputs.size(); i++) {
2814        mpClientInterface->closeInput(mInputs.keyAt(i));
2815   }
2816   mAvailableOutputDevices.clear();
2817   mAvailableInputDevices.clear();
2818   mOutputs.clear();
2819   mInputs.clear();
2820   mHwModules.clear();
2821}
2822
2823status_t AudioPolicyManager::initCheck()
2824{
2825    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2826}
2827
2828#ifdef AUDIO_POLICY_TEST
2829bool AudioPolicyManager::threadLoop()
2830{
2831    ALOGV("entering threadLoop()");
2832    while (!exitPending())
2833    {
2834        String8 command;
2835        int valueInt;
2836        String8 value;
2837
2838        Mutex::Autolock _l(mLock);
2839        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2840
2841        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2842        AudioParameter param = AudioParameter(command);
2843
2844        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2845            valueInt != 0) {
2846            ALOGV("Test command %s received", command.string());
2847            String8 target;
2848            if (param.get(String8("target"), target) != NO_ERROR) {
2849                target = "Manager";
2850            }
2851            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2852                param.remove(String8("test_cmd_policy_output"));
2853                mCurOutput = valueInt;
2854            }
2855            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2856                param.remove(String8("test_cmd_policy_direct"));
2857                if (value == "false") {
2858                    mDirectOutput = false;
2859                } else if (value == "true") {
2860                    mDirectOutput = true;
2861                }
2862            }
2863            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2864                param.remove(String8("test_cmd_policy_input"));
2865                mTestInput = valueInt;
2866            }
2867
2868            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2869                param.remove(String8("test_cmd_policy_format"));
2870                int format = AUDIO_FORMAT_INVALID;
2871                if (value == "PCM 16 bits") {
2872                    format = AUDIO_FORMAT_PCM_16_BIT;
2873                } else if (value == "PCM 8 bits") {
2874                    format = AUDIO_FORMAT_PCM_8_BIT;
2875                } else if (value == "Compressed MP3") {
2876                    format = AUDIO_FORMAT_MP3;
2877                }
2878                if (format != AUDIO_FORMAT_INVALID) {
2879                    if (target == "Manager") {
2880                        mTestFormat = format;
2881                    } else if (mTestOutputs[mCurOutput] != 0) {
2882                        AudioParameter outputParam = AudioParameter();
2883                        outputParam.addInt(String8("format"), format);
2884                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2885                    }
2886                }
2887            }
2888            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2889                param.remove(String8("test_cmd_policy_channels"));
2890                int channels = 0;
2891
2892                if (value == "Channels Stereo") {
2893                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2894                } else if (value == "Channels Mono") {
2895                    channels =  AUDIO_CHANNEL_OUT_MONO;
2896                }
2897                if (channels != 0) {
2898                    if (target == "Manager") {
2899                        mTestChannels = channels;
2900                    } else if (mTestOutputs[mCurOutput] != 0) {
2901                        AudioParameter outputParam = AudioParameter();
2902                        outputParam.addInt(String8("channels"), channels);
2903                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2904                    }
2905                }
2906            }
2907            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2908                param.remove(String8("test_cmd_policy_sampleRate"));
2909                if (valueInt >= 0 && valueInt <= 96000) {
2910                    int samplingRate = valueInt;
2911                    if (target == "Manager") {
2912                        mTestSamplingRate = samplingRate;
2913                    } else if (mTestOutputs[mCurOutput] != 0) {
2914                        AudioParameter outputParam = AudioParameter();
2915                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2916                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2917                    }
2918                }
2919            }
2920
2921            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2922                param.remove(String8("test_cmd_policy_reopen"));
2923
2924                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2925                mpClientInterface->closeOutput(mPrimaryOutput);
2926
2927                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2928
2929                mOutputs.removeItem(mPrimaryOutput);
2930
2931                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2932                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2933                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2934                config.sample_rate = outputDesc->mSamplingRate;
2935                config.channel_mask = outputDesc->mChannelMask;
2936                config.format = outputDesc->mFormat;
2937                status_t status = mpClientInterface->openOutput(moduleHandle,
2938                                                                &mPrimaryOutput,
2939                                                                &config,
2940                                                                &outputDesc->mDevice,
2941                                                                String8(""),
2942                                                                &outputDesc->mLatency,
2943                                                                outputDesc->mFlags);
2944                if (status != NO_ERROR) {
2945                    ALOGE("Failed to reopen hardware output stream, "
2946                        "samplingRate: %d, format %d, channels %d",
2947                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2948                } else {
2949                    outputDesc->mSamplingRate = config.sample_rate;
2950                    outputDesc->mChannelMask = config.channel_mask;
2951                    outputDesc->mFormat = config.format;
2952                    AudioParameter outputCmd = AudioParameter();
2953                    outputCmd.addInt(String8("set_id"), 0);
2954                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2955                    addOutput(mPrimaryOutput, outputDesc);
2956                }
2957            }
2958
2959
2960            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2961        }
2962    }
2963    return false;
2964}
2965
2966void AudioPolicyManager::exit()
2967{
2968    {
2969        AutoMutex _l(mLock);
2970        requestExit();
2971        mWaitWorkCV.signal();
2972    }
2973    requestExitAndWait();
2974}
2975
2976int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2977{
2978    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2979        if (output == mTestOutputs[i]) return i;
2980    }
2981    return 0;
2982}
2983#endif //AUDIO_POLICY_TEST
2984
2985// ---
2986
2987void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2988{
2989    outputDesc->mIoHandle = output;
2990    outputDesc->mId = nextUniqueId();
2991    mOutputs.add(output, outputDesc);
2992    nextAudioPortGeneration();
2993}
2994
2995void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2996{
2997    inputDesc->mIoHandle = input;
2998    inputDesc->mId = nextUniqueId();
2999    mInputs.add(input, inputDesc);
3000    nextAudioPortGeneration();
3001}
3002
3003void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3004        const String8 address /*in*/,
3005        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3006    // look for a match on the given address on the addresses of the outputs:
3007    // find the address by finding the patch that maps to this output
3008    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3009    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3010    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3011    if (patchIdx >= 0) {
3012        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3013        const int numSinks = patchDesc->mPatch.num_sinks;
3014        for (ssize_t j=0; j < numSinks; j++) {
3015            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3016                const char* patchAddr =
3017                        patchDesc->mPatch.sinks[j].ext.device.address;
3018                if (strncmp(patchAddr,
3019                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3020                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3021                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3022                    outputs.add(desc->mIoHandle);
3023                    break;
3024                }
3025            }
3026        }
3027    }
3028}
3029
3030status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3031                                                       audio_policy_dev_state_t state,
3032                                                       SortedVector<audio_io_handle_t>& outputs,
3033                                                       const String8 address)
3034{
3035    audio_devices_t device = devDesc->mDeviceType;
3036    sp<AudioOutputDescriptor> desc;
3037    // erase all current sample rates, formats and channel masks
3038    devDesc->clearCapabilities();
3039
3040    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3041        // first list already open outputs that can be routed to this device
3042        for (size_t i = 0; i < mOutputs.size(); i++) {
3043            desc = mOutputs.valueAt(i);
3044            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3045                if (!deviceDistinguishesOnAddress(device)) {
3046                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3047                    outputs.add(mOutputs.keyAt(i));
3048                } else {
3049                    ALOGV("  checking address match due to device 0x%x", device);
3050                    findIoHandlesByAddress(desc, address, outputs);
3051                }
3052            }
3053        }
3054        // then look for output profiles that can be routed to this device
3055        SortedVector< sp<IOProfile> > profiles;
3056        for (size_t i = 0; i < mHwModules.size(); i++)
3057        {
3058            if (mHwModules[i]->mHandle == 0) {
3059                continue;
3060            }
3061            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3062            {
3063                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3064                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3065                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3066                }
3067            }
3068        }
3069
3070        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3071
3072        if (profiles.isEmpty() && outputs.isEmpty()) {
3073            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3074            return BAD_VALUE;
3075        }
3076
3077        // open outputs for matching profiles if needed. Direct outputs are also opened to
3078        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3079        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3080            sp<IOProfile> profile = profiles[profile_index];
3081
3082            // nothing to do if one output is already opened for this profile
3083            size_t j;
3084            for (j = 0; j < outputs.size(); j++) {
3085                desc = mOutputs.valueFor(outputs.itemAt(j));
3086                if (!desc->isDuplicated() && desc->mProfile == profile) {
3087                    // matching profile: save the sample rates, format and channel masks supported
3088                    // by the profile in our device descriptor
3089                    devDesc->importAudioPort(profile);
3090                    break;
3091                }
3092            }
3093            if (j != outputs.size()) {
3094                continue;
3095            }
3096
3097            ALOGV("opening output for device %08x with params %s profile %p",
3098                                                      device, address.string(), profile.get());
3099            desc = new AudioOutputDescriptor(profile);
3100            desc->mDevice = device;
3101            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3102            config.sample_rate = desc->mSamplingRate;
3103            config.channel_mask = desc->mChannelMask;
3104            config.format = desc->mFormat;
3105            config.offload_info.sample_rate = desc->mSamplingRate;
3106            config.offload_info.channel_mask = desc->mChannelMask;
3107            config.offload_info.format = desc->mFormat;
3108            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3109            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3110                                                            &output,
3111                                                            &config,
3112                                                            &desc->mDevice,
3113                                                            address,
3114                                                            &desc->mLatency,
3115                                                            desc->mFlags);
3116            if (status == NO_ERROR) {
3117                desc->mSamplingRate = config.sample_rate;
3118                desc->mChannelMask = config.channel_mask;
3119                desc->mFormat = config.format;
3120
3121                // Here is where the out_set_parameters() for card & device gets called
3122                if (!address.isEmpty()) {
3123                    char *param = audio_device_address_to_parameter(device, address);
3124                    mpClientInterface->setParameters(output, String8(param));
3125                    free(param);
3126                }
3127
3128                // Here is where we step through and resolve any "dynamic" fields
3129                String8 reply;
3130                char *value;
3131                if (profile->mSamplingRates[0] == 0) {
3132                    reply = mpClientInterface->getParameters(output,
3133                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3134                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3135                              reply.string());
3136                    value = strpbrk((char *)reply.string(), "=");
3137                    if (value != NULL) {
3138                        profile->loadSamplingRates(value + 1);
3139                    }
3140                }
3141                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3142                    reply = mpClientInterface->getParameters(output,
3143                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3144                    ALOGV("checkOutputsForDevice() supported formats %s",
3145                              reply.string());
3146                    value = strpbrk((char *)reply.string(), "=");
3147                    if (value != NULL) {
3148                        profile->loadFormats(value + 1);
3149                    }
3150                }
3151                if (profile->mChannelMasks[0] == 0) {
3152                    reply = mpClientInterface->getParameters(output,
3153                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3154                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3155                              reply.string());
3156                    value = strpbrk((char *)reply.string(), "=");
3157                    if (value != NULL) {
3158                        profile->loadOutChannels(value + 1);
3159                    }
3160                }
3161                if (((profile->mSamplingRates[0] == 0) &&
3162                         (profile->mSamplingRates.size() < 2)) ||
3163                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3164                         (profile->mFormats.size() < 2)) ||
3165                     ((profile->mChannelMasks[0] == 0) &&
3166                         (profile->mChannelMasks.size() < 2))) {
3167                    ALOGW("checkOutputsForDevice() missing param");
3168                    mpClientInterface->closeOutput(output);
3169                    output = AUDIO_IO_HANDLE_NONE;
3170                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3171                            profile->mChannelMasks[0] == 0) {
3172                    mpClientInterface->closeOutput(output);
3173                    config.sample_rate = profile->pickSamplingRate();
3174                    config.channel_mask = profile->pickChannelMask();
3175                    config.format = profile->pickFormat();
3176                    config.offload_info.sample_rate = config.sample_rate;
3177                    config.offload_info.channel_mask = config.channel_mask;
3178                    config.offload_info.format = config.format;
3179                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3180                                                           &output,
3181                                                           &config,
3182                                                           &desc->mDevice,
3183                                                           address,
3184                                                           &desc->mLatency,
3185                                                           desc->mFlags);
3186                    if (status == NO_ERROR) {
3187                        desc->mSamplingRate = config.sample_rate;
3188                        desc->mChannelMask = config.channel_mask;
3189                        desc->mFormat = config.format;
3190                    } else {
3191                        output = AUDIO_IO_HANDLE_NONE;
3192                    }
3193                }
3194
3195                if (output != AUDIO_IO_HANDLE_NONE) {
3196                    addOutput(output, desc);
3197                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3198                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3199
3200                        // set initial stream volume for device
3201                        applyStreamVolumes(output, device, 0, true);
3202
3203                        //TODO: configure audio effect output stage here
3204
3205                        // open a duplicating output thread for the new output and the primary output
3206                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3207                                                                                  mPrimaryOutput);
3208                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3209                            // add duplicated output descriptor
3210                            sp<AudioOutputDescriptor> dupOutputDesc =
3211                                    new AudioOutputDescriptor(NULL);
3212                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3213                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3214                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3215                            dupOutputDesc->mFormat = desc->mFormat;
3216                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3217                            dupOutputDesc->mLatency = desc->mLatency;
3218                            addOutput(duplicatedOutput, dupOutputDesc);
3219                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3220                        } else {
3221                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3222                                    mPrimaryOutput, output);
3223                            mpClientInterface->closeOutput(output);
3224                            mOutputs.removeItem(output);
3225                            nextAudioPortGeneration();
3226                            output = AUDIO_IO_HANDLE_NONE;
3227                        }
3228                    }
3229                }
3230            } else {
3231                output = AUDIO_IO_HANDLE_NONE;
3232            }
3233            if (output == AUDIO_IO_HANDLE_NONE) {
3234                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3235                profiles.removeAt(profile_index);
3236                profile_index--;
3237            } else {
3238                outputs.add(output);
3239                devDesc->importAudioPort(profile);
3240
3241                if (deviceDistinguishesOnAddress(device)) {
3242                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3243                            device, address.string());
3244                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3245                            NULL/*patch handle*/, address.string());
3246                }
3247                ALOGV("checkOutputsForDevice(): adding output %d", output);
3248            }
3249        }
3250
3251        if (profiles.isEmpty()) {
3252            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3253            return BAD_VALUE;
3254        }
3255    } else { // Disconnect
3256        // check if one opened output is not needed any more after disconnecting one device
3257        for (size_t i = 0; i < mOutputs.size(); i++) {
3258            desc = mOutputs.valueAt(i);
3259            if (!desc->isDuplicated()) {
3260                if  (!(desc->mProfile->mSupportedDevices.types()
3261                        & mAvailableOutputDevices.types())) {
3262                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3263                            mOutputs.keyAt(i));
3264                    outputs.add(mOutputs.keyAt(i));
3265                } else if (deviceDistinguishesOnAddress(device) &&
3266                        // exact match on device
3267                        (desc->mProfile->mSupportedDevices.types() == device)) {
3268                    findIoHandlesByAddress(desc, address, outputs);
3269                }
3270            }
3271        }
3272        // Clear any profiles associated with the disconnected device.
3273        for (size_t i = 0; i < mHwModules.size(); i++)
3274        {
3275            if (mHwModules[i]->mHandle == 0) {
3276                continue;
3277            }
3278            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3279            {
3280                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3281                if (profile->mSupportedDevices.types() & device) {
3282                    ALOGV("checkOutputsForDevice(): "
3283                            "clearing direct output profile %zu on module %zu", j, i);
3284                    if (profile->mSamplingRates[0] == 0) {
3285                        profile->mSamplingRates.clear();
3286                        profile->mSamplingRates.add(0);
3287                    }
3288                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3289                        profile->mFormats.clear();
3290                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3291                    }
3292                    if (profile->mChannelMasks[0] == 0) {
3293                        profile->mChannelMasks.clear();
3294                        profile->mChannelMasks.add(0);
3295                    }
3296                }
3297            }
3298        }
3299    }
3300    return NO_ERROR;
3301}
3302
3303status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3304                                                      audio_policy_dev_state_t state,
3305                                                      SortedVector<audio_io_handle_t>& inputs,
3306                                                      const String8 address)
3307{
3308    sp<AudioInputDescriptor> desc;
3309    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3310        // first list already open inputs that can be routed to this device
3311        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3312            desc = mInputs.valueAt(input_index);
3313            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3314                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3315               inputs.add(mInputs.keyAt(input_index));
3316            }
3317        }
3318
3319        // then look for input profiles that can be routed to this device
3320        SortedVector< sp<IOProfile> > profiles;
3321        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3322        {
3323            if (mHwModules[module_idx]->mHandle == 0) {
3324                continue;
3325            }
3326            for (size_t profile_index = 0;
3327                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3328                 profile_index++)
3329            {
3330                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3331                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3332                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3333                          profile_index, module_idx);
3334                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3335                }
3336            }
3337        }
3338
3339        if (profiles.isEmpty() && inputs.isEmpty()) {
3340            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3341            return BAD_VALUE;
3342        }
3343
3344        // open inputs for matching profiles if needed. Direct inputs are also opened to
3345        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3346        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3347
3348            sp<IOProfile> profile = profiles[profile_index];
3349            // nothing to do if one input is already opened for this profile
3350            size_t input_index;
3351            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3352                desc = mInputs.valueAt(input_index);
3353                if (desc->mProfile == profile) {
3354                    break;
3355                }
3356            }
3357            if (input_index != mInputs.size()) {
3358                continue;
3359            }
3360
3361            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3362            desc = new AudioInputDescriptor(profile);
3363            desc->mDevice = device;
3364            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3365            config.sample_rate = desc->mSamplingRate;
3366            config.channel_mask = desc->mChannelMask;
3367            config.format = desc->mFormat;
3368            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3369            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3370                                                           &input,
3371                                                           &config,
3372                                                           &desc->mDevice,
3373                                                           address,
3374                                                           AUDIO_SOURCE_MIC,
3375                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3376
3377            if (status == NO_ERROR) {
3378                desc->mSamplingRate = config.sample_rate;
3379                desc->mChannelMask = config.channel_mask;
3380                desc->mFormat = config.format;
3381
3382                if (!address.isEmpty()) {
3383                    char *param = audio_device_address_to_parameter(device, address);
3384                    mpClientInterface->setParameters(input, String8(param));
3385                    free(param);
3386                }
3387
3388                // Here is where we step through and resolve any "dynamic" fields
3389                String8 reply;
3390                char *value;
3391                if (profile->mSamplingRates[0] == 0) {
3392                    reply = mpClientInterface->getParameters(input,
3393                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3394                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3395                              reply.string());
3396                    value = strpbrk((char *)reply.string(), "=");
3397                    if (value != NULL) {
3398                        profile->loadSamplingRates(value + 1);
3399                    }
3400                }
3401                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3402                    reply = mpClientInterface->getParameters(input,
3403                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3404                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3405                    value = strpbrk((char *)reply.string(), "=");
3406                    if (value != NULL) {
3407                        profile->loadFormats(value + 1);
3408                    }
3409                }
3410                if (profile->mChannelMasks[0] == 0) {
3411                    reply = mpClientInterface->getParameters(input,
3412                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3413                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3414                              reply.string());
3415                    value = strpbrk((char *)reply.string(), "=");
3416                    if (value != NULL) {
3417                        profile->loadInChannels(value + 1);
3418                    }
3419                }
3420                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3421                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3422                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3423                    ALOGW("checkInputsForDevice() direct input missing param");
3424                    mpClientInterface->closeInput(input);
3425                    input = AUDIO_IO_HANDLE_NONE;
3426                }
3427
3428                if (input != 0) {
3429                    addInput(input, desc);
3430                }
3431            } // endif input != 0
3432
3433            if (input == AUDIO_IO_HANDLE_NONE) {
3434                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3435                profiles.removeAt(profile_index);
3436                profile_index--;
3437            } else {
3438                inputs.add(input);
3439                ALOGV("checkInputsForDevice(): adding input %d", input);
3440            }
3441        } // end scan profiles
3442
3443        if (profiles.isEmpty()) {
3444            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3445            return BAD_VALUE;
3446        }
3447    } else {
3448        // Disconnect
3449        // check if one opened input is not needed any more after disconnecting one device
3450        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3451            desc = mInputs.valueAt(input_index);
3452            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3453                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3454                      mInputs.keyAt(input_index));
3455                inputs.add(mInputs.keyAt(input_index));
3456            }
3457        }
3458        // Clear any profiles associated with the disconnected device.
3459        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3460            if (mHwModules[module_index]->mHandle == 0) {
3461                continue;
3462            }
3463            for (size_t profile_index = 0;
3464                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3465                 profile_index++) {
3466                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3467                if (profile->mSupportedDevices.types() & device) {
3468                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3469                          profile_index, module_index);
3470                    if (profile->mSamplingRates[0] == 0) {
3471                        profile->mSamplingRates.clear();
3472                        profile->mSamplingRates.add(0);
3473                    }
3474                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3475                        profile->mFormats.clear();
3476                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3477                    }
3478                    if (profile->mChannelMasks[0] == 0) {
3479                        profile->mChannelMasks.clear();
3480                        profile->mChannelMasks.add(0);
3481                    }
3482                }
3483            }
3484        }
3485    } // end disconnect
3486
3487    return NO_ERROR;
3488}
3489
3490
3491void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3492{
3493    ALOGV("closeOutput(%d)", output);
3494
3495    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3496    if (outputDesc == NULL) {
3497        ALOGW("closeOutput() unknown output %d", output);
3498        return;
3499    }
3500
3501    // look for duplicated outputs connected to the output being removed.
3502    for (size_t i = 0; i < mOutputs.size(); i++) {
3503        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3504        if (dupOutputDesc->isDuplicated() &&
3505                (dupOutputDesc->mOutput1 == outputDesc ||
3506                dupOutputDesc->mOutput2 == outputDesc)) {
3507            sp<AudioOutputDescriptor> outputDesc2;
3508            if (dupOutputDesc->mOutput1 == outputDesc) {
3509                outputDesc2 = dupOutputDesc->mOutput2;
3510            } else {
3511                outputDesc2 = dupOutputDesc->mOutput1;
3512            }
3513            // As all active tracks on duplicated output will be deleted,
3514            // and as they were also referenced on the other output, the reference
3515            // count for their stream type must be adjusted accordingly on
3516            // the other output.
3517            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3518                int refCount = dupOutputDesc->mRefCount[j];
3519                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3520            }
3521            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3522            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3523
3524            mpClientInterface->closeOutput(duplicatedOutput);
3525            mOutputs.removeItem(duplicatedOutput);
3526        }
3527    }
3528
3529    nextAudioPortGeneration();
3530
3531    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3532    if (index >= 0) {
3533        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3534        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3535        mAudioPatches.removeItemsAt(index);
3536        mpClientInterface->onAudioPatchListUpdate();
3537    }
3538
3539    AudioParameter param;
3540    param.add(String8("closing"), String8("true"));
3541    mpClientInterface->setParameters(output, param.toString());
3542
3543    mpClientInterface->closeOutput(output);
3544    mOutputs.removeItem(output);
3545    mPreviousOutputs = mOutputs;
3546}
3547
3548void AudioPolicyManager::closeInput(audio_io_handle_t input)
3549{
3550    ALOGV("closeInput(%d)", input);
3551
3552    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3553    if (inputDesc == NULL) {
3554        ALOGW("closeInput() unknown input %d", input);
3555        return;
3556    }
3557
3558    nextAudioPortGeneration();
3559
3560    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3561    if (index >= 0) {
3562        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3563        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3564        mAudioPatches.removeItemsAt(index);
3565        mpClientInterface->onAudioPatchListUpdate();
3566    }
3567
3568    mpClientInterface->closeInput(input);
3569    mInputs.removeItem(input);
3570}
3571
3572SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3573                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3574{
3575    SortedVector<audio_io_handle_t> outputs;
3576
3577    ALOGVV("getOutputsForDevice() device %04x", device);
3578    for (size_t i = 0; i < openOutputs.size(); i++) {
3579        ALOGVV("output %d isDuplicated=%d device=%04x",
3580                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3581        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3582            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3583            outputs.add(openOutputs.keyAt(i));
3584        }
3585    }
3586    return outputs;
3587}
3588
3589bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3590                                   SortedVector<audio_io_handle_t>& outputs2)
3591{
3592    if (outputs1.size() != outputs2.size()) {
3593        return false;
3594    }
3595    for (size_t i = 0; i < outputs1.size(); i++) {
3596        if (outputs1[i] != outputs2[i]) {
3597            return false;
3598        }
3599    }
3600    return true;
3601}
3602
3603void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3604{
3605    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3606    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3607    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3608    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3609
3610    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3611        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3612              strategy, srcOutputs[0], dstOutputs[0]);
3613        // mute strategy while moving tracks from one output to another
3614        for (size_t i = 0; i < srcOutputs.size(); i++) {
3615            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3616            if (desc->isStrategyActive(strategy)) {
3617                setStrategyMute(strategy, true, srcOutputs[i]);
3618                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3619            }
3620        }
3621
3622        // Move effects associated to this strategy from previous output to new output
3623        if (strategy == STRATEGY_MEDIA) {
3624            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3625            SortedVector<audio_io_handle_t> moved;
3626            for (size_t i = 0; i < mEffects.size(); i++) {
3627                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3628                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3629                        effectDesc->mIo != fxOutput) {
3630                    if (moved.indexOf(effectDesc->mIo) < 0) {
3631                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3632                              mEffects.keyAt(i), fxOutput);
3633                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3634                                                       fxOutput);
3635                        moved.add(effectDesc->mIo);
3636                    }
3637                    effectDesc->mIo = fxOutput;
3638                }
3639            }
3640        }
3641        // Move tracks associated to this strategy from previous output to new output
3642        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3643            if (getStrategy((audio_stream_type_t)i) == strategy) {
3644                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3645            }
3646        }
3647    }
3648}
3649
3650void AudioPolicyManager::checkOutputForAllStrategies()
3651{
3652    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3653    checkOutputForStrategy(STRATEGY_PHONE);
3654    checkOutputForStrategy(STRATEGY_SONIFICATION);
3655    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3656    checkOutputForStrategy(STRATEGY_MEDIA);
3657    checkOutputForStrategy(STRATEGY_DTMF);
3658}
3659
3660audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3661{
3662    for (size_t i = 0; i < mOutputs.size(); i++) {
3663        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3664        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3665            return mOutputs.keyAt(i);
3666        }
3667    }
3668
3669    return 0;
3670}
3671
3672void AudioPolicyManager::checkA2dpSuspend()
3673{
3674    audio_io_handle_t a2dpOutput = getA2dpOutput();
3675    if (a2dpOutput == 0) {
3676        mA2dpSuspended = false;
3677        return;
3678    }
3679
3680    bool isScoConnected =
3681            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3682    // suspend A2DP output if:
3683    //      (NOT already suspended) &&
3684    //      ((SCO device is connected &&
3685    //       (forced usage for communication || for record is SCO))) ||
3686    //      (phone state is ringing || in call)
3687    //
3688    // restore A2DP output if:
3689    //      (Already suspended) &&
3690    //      ((SCO device is NOT connected ||
3691    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3692    //      (phone state is NOT ringing && NOT in call)
3693    //
3694    if (mA2dpSuspended) {
3695        if ((!isScoConnected ||
3696             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3697              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3698             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3699              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3700
3701            mpClientInterface->restoreOutput(a2dpOutput);
3702            mA2dpSuspended = false;
3703        }
3704    } else {
3705        if ((isScoConnected &&
3706             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3707              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3708             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3709              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3710
3711            mpClientInterface->suspendOutput(a2dpOutput);
3712            mA2dpSuspended = true;
3713        }
3714    }
3715}
3716
3717audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3718{
3719    audio_devices_t device = AUDIO_DEVICE_NONE;
3720
3721    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3722
3723    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3724    if (index >= 0) {
3725        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3726        if (patchDesc->mUid != mUidCached) {
3727            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3728                  outputDesc->device(), outputDesc->mPatchHandle);
3729            return outputDesc->device();
3730        }
3731    }
3732
3733    // check the following by order of priority to request a routing change if necessary:
3734    // 1: the strategy enforced audible is active on the output:
3735    //      use device for strategy enforced audible
3736    // 2: we are in call or the strategy phone is active on the output:
3737    //      use device for strategy phone
3738    // 3: the strategy sonification is active on the output:
3739    //      use device for strategy sonification
3740    // 4: the strategy "respectful" sonification is active on the output:
3741    //      use device for strategy "respectful" sonification
3742    // 5: the strategy media is active on the output:
3743    //      use device for strategy media
3744    // 6: the strategy DTMF is active on the output:
3745    //      use device for strategy DTMF
3746    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3747        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3748    } else if (isInCall() ||
3749                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3750        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3751    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3752        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3753    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3754        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3755    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3756        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3757    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3758        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3759    }
3760
3761    ALOGV("getNewOutputDevice() selected device %x", device);
3762    return device;
3763}
3764
3765audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3766{
3767    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3768
3769    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3770    if (index >= 0) {
3771        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3772        if (patchDesc->mUid != mUidCached) {
3773            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3774                  inputDesc->mDevice, inputDesc->mPatchHandle);
3775            return inputDesc->mDevice;
3776        }
3777    }
3778
3779    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3780
3781    ALOGV("getNewInputDevice() selected device %x", device);
3782    return device;
3783}
3784
3785uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3786    return (uint32_t)getStrategy(stream);
3787}
3788
3789audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3790    // By checking the range of stream before calling getStrategy, we avoid
3791    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3792    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3793    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3794        return AUDIO_DEVICE_NONE;
3795    }
3796    audio_devices_t devices;
3797    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3798    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3799    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3800    for (size_t i = 0; i < outputs.size(); i++) {
3801        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3802        if (outputDesc->isStrategyActive(strategy)) {
3803            devices = outputDesc->device();
3804            break;
3805        }
3806    }
3807    return devices;
3808}
3809
3810AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3811        audio_stream_type_t stream) {
3812    // stream to strategy mapping
3813    switch (stream) {
3814    case AUDIO_STREAM_VOICE_CALL:
3815    case AUDIO_STREAM_BLUETOOTH_SCO:
3816        return STRATEGY_PHONE;
3817    case AUDIO_STREAM_RING:
3818    case AUDIO_STREAM_ALARM:
3819        return STRATEGY_SONIFICATION;
3820    case AUDIO_STREAM_NOTIFICATION:
3821        return STRATEGY_SONIFICATION_RESPECTFUL;
3822    case AUDIO_STREAM_DTMF:
3823        return STRATEGY_DTMF;
3824    default:
3825        ALOGE("unknown stream type");
3826    case AUDIO_STREAM_SYSTEM:
3827        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3828        // while key clicks are played produces a poor result
3829    case AUDIO_STREAM_TTS:
3830    case AUDIO_STREAM_MUSIC:
3831        return STRATEGY_MEDIA;
3832    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3833        return STRATEGY_ENFORCED_AUDIBLE;
3834    }
3835}
3836
3837uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3838    // flags to strategy mapping
3839    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3840        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3841    }
3842
3843    // usage to strategy mapping
3844    switch (attr->usage) {
3845    case AUDIO_USAGE_MEDIA:
3846    case AUDIO_USAGE_GAME:
3847    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3848    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3849    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3850        return (uint32_t) STRATEGY_MEDIA;
3851
3852    case AUDIO_USAGE_VOICE_COMMUNICATION:
3853        return (uint32_t) STRATEGY_PHONE;
3854
3855    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3856        return (uint32_t) STRATEGY_DTMF;
3857
3858    case AUDIO_USAGE_ALARM:
3859    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3860        return (uint32_t) STRATEGY_SONIFICATION;
3861
3862    case AUDIO_USAGE_NOTIFICATION:
3863    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3864    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3865    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3866    case AUDIO_USAGE_NOTIFICATION_EVENT:
3867        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3868
3869    case AUDIO_USAGE_UNKNOWN:
3870    default:
3871        return (uint32_t) STRATEGY_MEDIA;
3872    }
3873}
3874
3875void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3876    switch(stream) {
3877    case AUDIO_STREAM_MUSIC:
3878        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3879        updateDevicesAndOutputs();
3880        break;
3881    default:
3882        break;
3883    }
3884}
3885
3886audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3887                                                             bool fromCache)
3888{
3889    uint32_t device = AUDIO_DEVICE_NONE;
3890
3891    if (fromCache) {
3892        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3893              strategy, mDeviceForStrategy[strategy]);
3894        return mDeviceForStrategy[strategy];
3895    }
3896    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3897    switch (strategy) {
3898
3899    case STRATEGY_SONIFICATION_RESPECTFUL:
3900        if (isInCall()) {
3901            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3902        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3903                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3904            // while media is playing on a remote device, use the the sonification behavior.
3905            // Note that we test this usecase before testing if media is playing because
3906            //   the isStreamActive() method only informs about the activity of a stream, not
3907            //   if it's for local playback. Note also that we use the same delay between both tests
3908            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3909        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3910            // while media is playing (or has recently played), use the same device
3911            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3912        } else {
3913            // when media is not playing anymore, fall back on the sonification behavior
3914            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3915        }
3916
3917        break;
3918
3919    case STRATEGY_DTMF:
3920        if (!isInCall()) {
3921            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3922            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3923            break;
3924        }
3925        // when in call, DTMF and PHONE strategies follow the same rules
3926        // FALL THROUGH
3927
3928    case STRATEGY_PHONE:
3929        // Force use of only devices on primary output if:
3930        // - in call AND
3931        //   - cannot route from voice call RX OR
3932        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
3933        if (mPhoneState == AUDIO_MODE_IN_CALL) {
3934            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
3935            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
3936            if (((mAvailableInputDevices.types() &
3937                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
3938                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
3939                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
3940                             AUDIO_DEVICE_API_VERSION_3_0))) {
3941                availableOutputDeviceTypes = availablePrimaryOutputDevices();
3942            }
3943        }
3944        // for phone strategy, we first consider the forced use and then the available devices by order
3945        // of priority
3946        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3947        case AUDIO_POLICY_FORCE_BT_SCO:
3948            if (!isInCall() || strategy != STRATEGY_DTMF) {
3949                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3950                if (device) break;
3951            }
3952            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3953            if (device) break;
3954            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3955            if (device) break;
3956            // if SCO device is requested but no SCO device is available, fall back to default case
3957            // FALL THROUGH
3958
3959        default:    // FORCE_NONE
3960            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3961            if (!isInCall() &&
3962                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3963                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3964                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3965                if (device) break;
3966                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3967                if (device) break;
3968            }
3969            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3970            if (device) break;
3971            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3972            if (device) break;
3973            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3974            if (device) break;
3975            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3976                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3977                if (device) break;
3978                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3979                if (device) break;
3980                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3981                if (device) break;
3982                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3983                if (device) break;
3984            }
3985            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3986            if (device) break;
3987            device = mDefaultOutputDevice->mDeviceType;
3988            if (device == AUDIO_DEVICE_NONE) {
3989                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3990            }
3991            break;
3992
3993        case AUDIO_POLICY_FORCE_SPEAKER:
3994            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3995            // A2DP speaker when forcing to speaker output
3996            if (!isInCall() &&
3997                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3998                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3999                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4000                if (device) break;
4001            }
4002            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4003                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4004                if (device) break;
4005                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4006                if (device) break;
4007                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4008                if (device) break;
4009                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4010                if (device) break;
4011                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4012                if (device) break;
4013            }
4014            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4015            if (device) break;
4016            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4017            if (device) break;
4018            device = mDefaultOutputDevice->mDeviceType;
4019            if (device == AUDIO_DEVICE_NONE) {
4020                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4021            }
4022            break;
4023        }
4024    break;
4025
4026    case STRATEGY_SONIFICATION:
4027
4028        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4029        // handleIncallSonification().
4030        if (isInCall()) {
4031            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4032            break;
4033        }
4034        // FALL THROUGH
4035
4036    case STRATEGY_ENFORCED_AUDIBLE:
4037        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4038        // except:
4039        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4040        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4041
4042        if ((strategy == STRATEGY_SONIFICATION) ||
4043                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4044            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4045            if (device == AUDIO_DEVICE_NONE) {
4046                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4047            }
4048        }
4049        // The second device used for sonification is the same as the device used by media strategy
4050        // FALL THROUGH
4051
4052    case STRATEGY_MEDIA: {
4053        uint32_t device2 = AUDIO_DEVICE_NONE;
4054        if (strategy != STRATEGY_SONIFICATION) {
4055            // no sonification on remote submix (e.g. WFD)
4056            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4057        }
4058        if ((device2 == AUDIO_DEVICE_NONE) &&
4059                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4060                (getA2dpOutput() != 0) && !mA2dpSuspended) {
4061            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4062            if (device2 == AUDIO_DEVICE_NONE) {
4063                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4064            }
4065            if (device2 == AUDIO_DEVICE_NONE) {
4066                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4067            }
4068        }
4069        if (device2 == AUDIO_DEVICE_NONE) {
4070            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4071        }
4072        if ((device2 == AUDIO_DEVICE_NONE)) {
4073            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4074        }
4075        if (device2 == AUDIO_DEVICE_NONE) {
4076            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4077        }
4078        if (device2 == AUDIO_DEVICE_NONE) {
4079            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4080        }
4081        if (device2 == AUDIO_DEVICE_NONE) {
4082            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4083        }
4084        if (device2 == AUDIO_DEVICE_NONE) {
4085            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4086        }
4087        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4088            // no sonification on aux digital (e.g. HDMI)
4089            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4090        }
4091        if ((device2 == AUDIO_DEVICE_NONE) &&
4092                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4093            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4094        }
4095        if (device2 == AUDIO_DEVICE_NONE) {
4096            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4097        }
4098        int device3 = AUDIO_DEVICE_NONE;
4099        if (strategy == STRATEGY_MEDIA) {
4100            // ARC, SPDIF and AUX_LINE can co-exist with others.
4101            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4102            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4103            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4104        }
4105
4106        device2 |= device3;
4107        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4108        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4109        device |= device2;
4110
4111        // If hdmi system audio mode is on, remove speaker out of output list.
4112        if ((strategy == STRATEGY_MEDIA) &&
4113            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4114                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4115            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4116        }
4117
4118        if (device) break;
4119        device = mDefaultOutputDevice->mDeviceType;
4120        if (device == AUDIO_DEVICE_NONE) {
4121            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4122        }
4123        } break;
4124
4125    default:
4126        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4127        break;
4128    }
4129
4130    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4131    return device;
4132}
4133
4134void AudioPolicyManager::updateDevicesAndOutputs()
4135{
4136    for (int i = 0; i < NUM_STRATEGIES; i++) {
4137        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4138    }
4139    mPreviousOutputs = mOutputs;
4140}
4141
4142uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4143                                                       audio_devices_t prevDevice,
4144                                                       uint32_t delayMs)
4145{
4146    // mute/unmute strategies using an incompatible device combination
4147    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4148    // if unmuting, unmute only after the specified delay
4149    if (outputDesc->isDuplicated()) {
4150        return 0;
4151    }
4152
4153    uint32_t muteWaitMs = 0;
4154    audio_devices_t device = outputDesc->device();
4155    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4156
4157    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4158        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4159        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4160        bool doMute = false;
4161
4162        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4163            doMute = true;
4164            outputDesc->mStrategyMutedByDevice[i] = true;
4165        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4166            doMute = true;
4167            outputDesc->mStrategyMutedByDevice[i] = false;
4168        }
4169        if (doMute) {
4170            for (size_t j = 0; j < mOutputs.size(); j++) {
4171                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4172                // skip output if it does not share any device with current output
4173                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4174                        == AUDIO_DEVICE_NONE) {
4175                    continue;
4176                }
4177                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4178                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4179                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4180                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4181                if (desc->isStrategyActive((routing_strategy)i)) {
4182                    if (mute) {
4183                        // FIXME: should not need to double latency if volume could be applied
4184                        // immediately by the audioflinger mixer. We must account for the delay
4185                        // between now and the next time the audioflinger thread for this output
4186                        // will process a buffer (which corresponds to one buffer size,
4187                        // usually 1/2 or 1/4 of the latency).
4188                        if (muteWaitMs < desc->latency() * 2) {
4189                            muteWaitMs = desc->latency() * 2;
4190                        }
4191                    }
4192                }
4193            }
4194        }
4195    }
4196
4197    // temporary mute output if device selection changes to avoid volume bursts due to
4198    // different per device volumes
4199    if (outputDesc->isActive() && (device != prevDevice)) {
4200        if (muteWaitMs < outputDesc->latency() * 2) {
4201            muteWaitMs = outputDesc->latency() * 2;
4202        }
4203        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4204            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4205                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4206                // do tempMute unmute after twice the mute wait time
4207                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4208                                muteWaitMs *2, device);
4209            }
4210        }
4211    }
4212
4213    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4214    if (muteWaitMs > delayMs) {
4215        muteWaitMs -= delayMs;
4216        usleep(muteWaitMs * 1000);
4217        return muteWaitMs;
4218    }
4219    return 0;
4220}
4221
4222uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4223                                             audio_devices_t device,
4224                                             bool force,
4225                                             int delayMs,
4226                                             audio_patch_handle_t *patchHandle,
4227                                             const char* address)
4228{
4229    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4230    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4231    AudioParameter param;
4232    uint32_t muteWaitMs;
4233
4234    if (outputDesc->isDuplicated()) {
4235        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4236        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4237        return muteWaitMs;
4238    }
4239    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4240    // output profile
4241    if ((device != AUDIO_DEVICE_NONE) &&
4242            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4243        return 0;
4244    }
4245
4246    // filter devices according to output selected
4247    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4248
4249    audio_devices_t prevDevice = outputDesc->mDevice;
4250
4251    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4252
4253    if (device != AUDIO_DEVICE_NONE) {
4254        outputDesc->mDevice = device;
4255    }
4256    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4257
4258    // Do not change the routing if:
4259    //  - the requested device is AUDIO_DEVICE_NONE
4260    //  - the requested device is the same as current device and force is not specified.
4261    // Doing this check here allows the caller to call setOutputDevice() without conditions
4262    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
4263        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
4264        return muteWaitMs;
4265    }
4266
4267    ALOGV("setOutputDevice() changing device");
4268
4269    // do the routing
4270    if (device == AUDIO_DEVICE_NONE) {
4271        resetOutputDevice(output, delayMs, NULL);
4272    } else {
4273        DeviceVector deviceList = (address == NULL) ?
4274                mAvailableOutputDevices.getDevicesFromType(device)
4275                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4276        if (!deviceList.isEmpty()) {
4277            struct audio_patch patch;
4278            outputDesc->toAudioPortConfig(&patch.sources[0]);
4279            patch.num_sources = 1;
4280            patch.num_sinks = 0;
4281            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4282                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4283                patch.num_sinks++;
4284            }
4285            ssize_t index;
4286            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4287                index = mAudioPatches.indexOfKey(*patchHandle);
4288            } else {
4289                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4290            }
4291            sp< AudioPatch> patchDesc;
4292            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4293            if (index >= 0) {
4294                patchDesc = mAudioPatches.valueAt(index);
4295                afPatchHandle = patchDesc->mAfPatchHandle;
4296            }
4297
4298            status_t status = mpClientInterface->createAudioPatch(&patch,
4299                                                                   &afPatchHandle,
4300                                                                   delayMs);
4301            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4302                    "num_sources %d num_sinks %d",
4303                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4304            if (status == NO_ERROR) {
4305                if (index < 0) {
4306                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4307                                               &patch, mUidCached);
4308                    addAudioPatch(patchDesc->mHandle, patchDesc);
4309                } else {
4310                    patchDesc->mPatch = patch;
4311                }
4312                patchDesc->mAfPatchHandle = afPatchHandle;
4313                patchDesc->mUid = mUidCached;
4314                if (patchHandle) {
4315                    *patchHandle = patchDesc->mHandle;
4316                }
4317                outputDesc->mPatchHandle = patchDesc->mHandle;
4318                nextAudioPortGeneration();
4319                mpClientInterface->onAudioPatchListUpdate();
4320            }
4321        }
4322    }
4323
4324    // update stream volumes according to new device
4325    applyStreamVolumes(output, device, delayMs);
4326
4327    return muteWaitMs;
4328}
4329
4330status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4331                                               int delayMs,
4332                                               audio_patch_handle_t *patchHandle)
4333{
4334    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4335    ssize_t index;
4336    if (patchHandle) {
4337        index = mAudioPatches.indexOfKey(*patchHandle);
4338    } else {
4339        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4340    }
4341    if (index < 0) {
4342        return INVALID_OPERATION;
4343    }
4344    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4345    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4346    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4347    outputDesc->mPatchHandle = 0;
4348    removeAudioPatch(patchDesc->mHandle);
4349    nextAudioPortGeneration();
4350    mpClientInterface->onAudioPatchListUpdate();
4351    return status;
4352}
4353
4354status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4355                                            audio_devices_t device,
4356                                            bool force,
4357                                            audio_patch_handle_t *patchHandle)
4358{
4359    status_t status = NO_ERROR;
4360
4361    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4362    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4363        inputDesc->mDevice = device;
4364
4365        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4366        if (!deviceList.isEmpty()) {
4367            struct audio_patch patch;
4368            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4369            // AUDIO_SOURCE_HOTWORD is for internal use only:
4370            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4371            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4372                    !inputDesc->mIsSoundTrigger) {
4373                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4374            }
4375            patch.num_sinks = 1;
4376            //only one input device for now
4377            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4378            patch.num_sources = 1;
4379            ssize_t index;
4380            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4381                index = mAudioPatches.indexOfKey(*patchHandle);
4382            } else {
4383                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4384            }
4385            sp< AudioPatch> patchDesc;
4386            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4387            if (index >= 0) {
4388                patchDesc = mAudioPatches.valueAt(index);
4389                afPatchHandle = patchDesc->mAfPatchHandle;
4390            }
4391
4392            status_t status = mpClientInterface->createAudioPatch(&patch,
4393                                                                  &afPatchHandle,
4394                                                                  0);
4395            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4396                                                                          status, afPatchHandle);
4397            if (status == NO_ERROR) {
4398                if (index < 0) {
4399                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4400                                               &patch, mUidCached);
4401                    addAudioPatch(patchDesc->mHandle, patchDesc);
4402                } else {
4403                    patchDesc->mPatch = patch;
4404                }
4405                patchDesc->mAfPatchHandle = afPatchHandle;
4406                patchDesc->mUid = mUidCached;
4407                if (patchHandle) {
4408                    *patchHandle = patchDesc->mHandle;
4409                }
4410                inputDesc->mPatchHandle = patchDesc->mHandle;
4411                nextAudioPortGeneration();
4412                mpClientInterface->onAudioPatchListUpdate();
4413            }
4414        }
4415    }
4416    return status;
4417}
4418
4419status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4420                                              audio_patch_handle_t *patchHandle)
4421{
4422    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4423    ssize_t index;
4424    if (patchHandle) {
4425        index = mAudioPatches.indexOfKey(*patchHandle);
4426    } else {
4427        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4428    }
4429    if (index < 0) {
4430        return INVALID_OPERATION;
4431    }
4432    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4433    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4434    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4435    inputDesc->mPatchHandle = 0;
4436    removeAudioPatch(patchDesc->mHandle);
4437    nextAudioPortGeneration();
4438    mpClientInterface->onAudioPatchListUpdate();
4439    return status;
4440}
4441
4442sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4443                                                   uint32_t& samplingRate,
4444                                                   audio_format_t format,
4445                                                   audio_channel_mask_t channelMask,
4446                                                   audio_input_flags_t flags)
4447{
4448    // Choose an input profile based on the requested capture parameters: select the first available
4449    // profile supporting all requested parameters.
4450
4451    for (size_t i = 0; i < mHwModules.size(); i++)
4452    {
4453        if (mHwModules[i]->mHandle == 0) {
4454            continue;
4455        }
4456        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4457        {
4458            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4459            // profile->log();
4460            if (profile->isCompatibleProfile(device, samplingRate,
4461                                             &samplingRate /*updatedSamplingRate*/,
4462                                             format, channelMask, (audio_output_flags_t) flags)) {
4463                return profile;
4464            }
4465        }
4466    }
4467    return NULL;
4468}
4469
4470audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4471{
4472    uint32_t device = AUDIO_DEVICE_NONE;
4473    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4474                                            ~AUDIO_DEVICE_BIT_IN;
4475    switch (inputSource) {
4476    case AUDIO_SOURCE_VOICE_UPLINK:
4477      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4478          device = AUDIO_DEVICE_IN_VOICE_CALL;
4479          break;
4480      }
4481      break;
4482
4483    case AUDIO_SOURCE_DEFAULT:
4484    case AUDIO_SOURCE_MIC:
4485    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4486        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4487    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4488        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4489    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4490        device = AUDIO_DEVICE_IN_USB_DEVICE;
4491    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4492        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4493    }
4494    break;
4495
4496    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4497        // Allow only use of devices on primary input if in call and HAL does not support routing
4498        // to voice call path.
4499        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4500                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4501            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4502        }
4503
4504        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4505        case AUDIO_POLICY_FORCE_BT_SCO:
4506            // if SCO device is requested but no SCO device is available, fall back to default case
4507            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4508                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4509                break;
4510            }
4511            // FALL THROUGH
4512
4513        default:    // FORCE_NONE
4514            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4515                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4516            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4517                device = AUDIO_DEVICE_IN_USB_DEVICE;
4518            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4519                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4520            }
4521            break;
4522
4523        case AUDIO_POLICY_FORCE_SPEAKER:
4524            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4525                device = AUDIO_DEVICE_IN_BACK_MIC;
4526            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4527                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4528            }
4529            break;
4530        }
4531        break;
4532
4533    case AUDIO_SOURCE_VOICE_RECOGNITION:
4534    case AUDIO_SOURCE_HOTWORD:
4535        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4536                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4537            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4538        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4539            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4540        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4541            device = AUDIO_DEVICE_IN_USB_DEVICE;
4542        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4543            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4544        }
4545        break;
4546    case AUDIO_SOURCE_CAMCORDER:
4547        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4548            device = AUDIO_DEVICE_IN_BACK_MIC;
4549        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4550            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4551        }
4552        break;
4553    case AUDIO_SOURCE_VOICE_DOWNLINK:
4554    case AUDIO_SOURCE_VOICE_CALL:
4555        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4556            device = AUDIO_DEVICE_IN_VOICE_CALL;
4557        }
4558        break;
4559    case AUDIO_SOURCE_REMOTE_SUBMIX:
4560        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4561            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4562        }
4563        break;
4564    default:
4565        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4566        break;
4567    }
4568    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4569    return device;
4570}
4571
4572bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4573{
4574    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4575        device &= ~AUDIO_DEVICE_BIT_IN;
4576        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4577            return true;
4578    }
4579    return false;
4580}
4581
4582bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4583    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4584}
4585
4586audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4587{
4588    for (size_t i = 0; i < mInputs.size(); i++) {
4589        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4590        if ((input_descriptor->mRefCount > 0)
4591                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4592            return mInputs.keyAt(i);
4593        }
4594    }
4595    return 0;
4596}
4597
4598uint32_t AudioPolicyManager::activeInputsCount() const
4599{
4600    uint32_t count = 0;
4601    for (size_t i = 0; i < mInputs.size(); i++) {
4602        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4603        if (desc->mRefCount > 0) {
4604            return count++;
4605        }
4606    }
4607    return count;
4608}
4609
4610
4611audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4612{
4613    if (device == AUDIO_DEVICE_NONE) {
4614        // this happens when forcing a route update and no track is active on an output.
4615        // In this case the returned category is not important.
4616        device =  AUDIO_DEVICE_OUT_SPEAKER;
4617    } else if (popcount(device) > 1) {
4618        // Multiple device selection is either:
4619        //  - speaker + one other device: give priority to speaker in this case.
4620        //  - one A2DP device + another device: happens with duplicated output. In this case
4621        // retain the device on the A2DP output as the other must not correspond to an active
4622        // selection if not the speaker.
4623        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4624            device = AUDIO_DEVICE_OUT_SPEAKER;
4625        } else {
4626            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4627        }
4628    }
4629
4630    ALOGW_IF(popcount(device) != 1,
4631            "getDeviceForVolume() invalid device combination: %08x",
4632            device);
4633
4634    return device;
4635}
4636
4637AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4638{
4639    switch(getDeviceForVolume(device)) {
4640        case AUDIO_DEVICE_OUT_EARPIECE:
4641            return DEVICE_CATEGORY_EARPIECE;
4642        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4643        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4644        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4645        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4646        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4647        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4648            return DEVICE_CATEGORY_HEADSET;
4649        case AUDIO_DEVICE_OUT_LINE:
4650        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4651        /*USB?  Remote submix?*/
4652            return DEVICE_CATEGORY_EXT_MEDIA;
4653        case AUDIO_DEVICE_OUT_SPEAKER:
4654        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4655        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4656        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4657        case AUDIO_DEVICE_OUT_USB_DEVICE:
4658        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4659        default:
4660            return DEVICE_CATEGORY_SPEAKER;
4661    }
4662}
4663
4664float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4665        int indexInUi)
4666{
4667    device_category deviceCategory = getDeviceCategory(device);
4668    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4669
4670    // the volume index in the UI is relative to the min and max volume indices for this stream type
4671    int nbSteps = 1 + curve[VOLMAX].mIndex -
4672            curve[VOLMIN].mIndex;
4673    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4674            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4675
4676    // find what part of the curve this index volume belongs to, or if it's out of bounds
4677    int segment = 0;
4678    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4679        return 0.0f;
4680    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4681        segment = 0;
4682    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4683        segment = 1;
4684    } else if (volIdx <= curve[VOLMAX].mIndex) {
4685        segment = 2;
4686    } else {                                                               // out of bounds
4687        return 1.0f;
4688    }
4689
4690    // linear interpolation in the attenuation table in dB
4691    float decibels = curve[segment].mDBAttenuation +
4692            ((float)(volIdx - curve[segment].mIndex)) *
4693                ( (curve[segment+1].mDBAttenuation -
4694                        curve[segment].mDBAttenuation) /
4695                    ((float)(curve[segment+1].mIndex -
4696                            curve[segment].mIndex)) );
4697
4698    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4699
4700    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4701            curve[segment].mIndex, volIdx,
4702            curve[segment+1].mIndex,
4703            curve[segment].mDBAttenuation,
4704            decibels,
4705            curve[segment+1].mDBAttenuation,
4706            amplification);
4707
4708    return amplification;
4709}
4710
4711const AudioPolicyManager::VolumeCurvePoint
4712    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4713    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4714};
4715
4716const AudioPolicyManager::VolumeCurvePoint
4717    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4718    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4719};
4720
4721const AudioPolicyManager::VolumeCurvePoint
4722    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4723    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
4724};
4725
4726const AudioPolicyManager::VolumeCurvePoint
4727    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4728    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4729};
4730
4731const AudioPolicyManager::VolumeCurvePoint
4732    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4733    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4734};
4735
4736const AudioPolicyManager::VolumeCurvePoint
4737    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4738    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4739};
4740
4741const AudioPolicyManager::VolumeCurvePoint
4742    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4743    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4744};
4745
4746// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4747// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4748// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4749// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4750
4751const AudioPolicyManager::VolumeCurvePoint
4752    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4753    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4754};
4755
4756const AudioPolicyManager::VolumeCurvePoint
4757    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4758    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4759};
4760
4761const AudioPolicyManager::VolumeCurvePoint
4762    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4763    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4764};
4765
4766const AudioPolicyManager::VolumeCurvePoint
4767    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4768    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4769};
4770
4771const AudioPolicyManager::VolumeCurvePoint
4772    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4773    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4774};
4775
4776const AudioPolicyManager::VolumeCurvePoint
4777            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4778                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4779    { // AUDIO_STREAM_VOICE_CALL
4780        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4781        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4782        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4783        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4784    },
4785    { // AUDIO_STREAM_SYSTEM
4786        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4787        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4788        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4789        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4790    },
4791    { // AUDIO_STREAM_RING
4792        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4793        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4794        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4795        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4796    },
4797    { // AUDIO_STREAM_MUSIC
4798        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4799        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4800        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4801        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4802    },
4803    { // AUDIO_STREAM_ALARM
4804        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4805        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4806        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4807        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4808    },
4809    { // AUDIO_STREAM_NOTIFICATION
4810        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4811        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4812        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4813        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4814    },
4815    { // AUDIO_STREAM_BLUETOOTH_SCO
4816        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4817        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4818        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4819        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4820    },
4821    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4822        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4823        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4824        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4825        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4826    },
4827    {  // AUDIO_STREAM_DTMF
4828        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4829        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4830        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4831        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4832    },
4833    { // AUDIO_STREAM_TTS
4834        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4835        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4836        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4837        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4838    },
4839};
4840
4841void AudioPolicyManager::initializeVolumeCurves()
4842{
4843    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4844        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4845            mStreams[i].mVolumeCurve[j] =
4846                    sVolumeProfiles[i][j];
4847        }
4848    }
4849
4850    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4851    if (mSpeakerDrcEnabled) {
4852        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4853                sDefaultSystemVolumeCurveDrc;
4854        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4855                sSpeakerSonificationVolumeCurveDrc;
4856        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4857                sSpeakerSonificationVolumeCurveDrc;
4858        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4859                sSpeakerSonificationVolumeCurveDrc;
4860        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4861                sSpeakerMediaVolumeCurveDrc;
4862    }
4863}
4864
4865float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4866                                            int index,
4867                                            audio_io_handle_t output,
4868                                            audio_devices_t device)
4869{
4870    float volume = 1.0;
4871    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4872    StreamDescriptor &streamDesc = mStreams[stream];
4873
4874    if (device == AUDIO_DEVICE_NONE) {
4875        device = outputDesc->device();
4876    }
4877
4878    volume = volIndexToAmpl(device, streamDesc, index);
4879
4880    // if a headset is connected, apply the following rules to ring tones and notifications
4881    // to avoid sound level bursts in user's ears:
4882    // - always attenuate ring tones and notifications volume by 6dB
4883    // - if music is playing, always limit the volume to current music volume,
4884    // with a minimum threshold at -36dB so that notification is always perceived.
4885    const routing_strategy stream_strategy = getStrategy(stream);
4886    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4887            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4888            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4889            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4890        ((stream_strategy == STRATEGY_SONIFICATION)
4891                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4892                || (stream == AUDIO_STREAM_SYSTEM)
4893                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4894                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4895        streamDesc.mCanBeMuted) {
4896        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4897        // when the phone is ringing we must consider that music could have been paused just before
4898        // by the music application and behave as if music was active if the last music track was
4899        // just stopped
4900        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4901                mLimitRingtoneVolume) {
4902            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4903            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4904                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4905                               output,
4906                               musicDevice);
4907            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4908                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4909            if (volume > minVol) {
4910                volume = minVol;
4911                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4912            }
4913        }
4914    }
4915
4916    return volume;
4917}
4918
4919status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4920                                                   int index,
4921                                                   audio_io_handle_t output,
4922                                                   audio_devices_t device,
4923                                                   int delayMs,
4924                                                   bool force)
4925{
4926
4927    // do not change actual stream volume if the stream is muted
4928    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4929        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4930              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4931        return NO_ERROR;
4932    }
4933
4934    // do not change in call volume if bluetooth is connected and vice versa
4935    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4936            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4937        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4938                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4939        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4940             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4941        return INVALID_OPERATION;
4942    }
4943
4944    float volume = computeVolume(stream, index, output, device);
4945    // We actually change the volume if:
4946    // - the float value returned by computeVolume() changed
4947    // - the force flag is set
4948    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4949            force) {
4950        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4951        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4952        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4953        // enabled
4954        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4955            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4956        }
4957        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4958    }
4959
4960    if (stream == AUDIO_STREAM_VOICE_CALL ||
4961        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4962        float voiceVolume;
4963        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4964        if (stream == AUDIO_STREAM_VOICE_CALL) {
4965            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4966        } else {
4967            voiceVolume = 1.0;
4968        }
4969
4970        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4971            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4972            mLastVoiceVolume = voiceVolume;
4973        }
4974    }
4975
4976    return NO_ERROR;
4977}
4978
4979void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4980                                                audio_devices_t device,
4981                                                int delayMs,
4982                                                bool force)
4983{
4984    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4985
4986    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4987        checkAndSetVolume((audio_stream_type_t)stream,
4988                          mStreams[stream].getVolumeIndex(device),
4989                          output,
4990                          device,
4991                          delayMs,
4992                          force);
4993    }
4994}
4995
4996void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4997                                             bool on,
4998                                             audio_io_handle_t output,
4999                                             int delayMs,
5000                                             audio_devices_t device)
5001{
5002    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5003    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5004        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5005            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5006        }
5007    }
5008}
5009
5010void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5011                                           bool on,
5012                                           audio_io_handle_t output,
5013                                           int delayMs,
5014                                           audio_devices_t device)
5015{
5016    StreamDescriptor &streamDesc = mStreams[stream];
5017    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5018    if (device == AUDIO_DEVICE_NONE) {
5019        device = outputDesc->device();
5020    }
5021
5022    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5023          stream, on, output, outputDesc->mMuteCount[stream], device);
5024
5025    if (on) {
5026        if (outputDesc->mMuteCount[stream] == 0) {
5027            if (streamDesc.mCanBeMuted &&
5028                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5029                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5030                checkAndSetVolume(stream, 0, output, device, delayMs);
5031            }
5032        }
5033        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5034        outputDesc->mMuteCount[stream]++;
5035    } else {
5036        if (outputDesc->mMuteCount[stream] == 0) {
5037            ALOGV("setStreamMute() unmuting non muted stream!");
5038            return;
5039        }
5040        if (--outputDesc->mMuteCount[stream] == 0) {
5041            checkAndSetVolume(stream,
5042                              streamDesc.getVolumeIndex(device),
5043                              output,
5044                              device,
5045                              delayMs);
5046        }
5047    }
5048}
5049
5050void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5051                                                      bool starting, bool stateChange)
5052{
5053    // if the stream pertains to sonification strategy and we are in call we must
5054    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5055    // in the device used for phone strategy and play the tone if the selected device does not
5056    // interfere with the device used for phone strategy
5057    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5058    // many times as there are active tracks on the output
5059    const routing_strategy stream_strategy = getStrategy(stream);
5060    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5061            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5062        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5063        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5064                stream, starting, outputDesc->mDevice, stateChange);
5065        if (outputDesc->mRefCount[stream]) {
5066            int muteCount = 1;
5067            if (stateChange) {
5068                muteCount = outputDesc->mRefCount[stream];
5069            }
5070            if (audio_is_low_visibility(stream)) {
5071                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5072                for (int i = 0; i < muteCount; i++) {
5073                    setStreamMute(stream, starting, mPrimaryOutput);
5074                }
5075            } else {
5076                ALOGV("handleIncallSonification() high visibility");
5077                if (outputDesc->device() &
5078                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5079                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5080                    for (int i = 0; i < muteCount; i++) {
5081                        setStreamMute(stream, starting, mPrimaryOutput);
5082                    }
5083                }
5084                if (starting) {
5085                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5086                                                 AUDIO_STREAM_VOICE_CALL);
5087                } else {
5088                    mpClientInterface->stopTone();
5089                }
5090            }
5091        }
5092    }
5093}
5094
5095bool AudioPolicyManager::isInCall()
5096{
5097    return isStateInCall(mPhoneState);
5098}
5099
5100bool AudioPolicyManager::isStateInCall(int state) {
5101    return ((state == AUDIO_MODE_IN_CALL) ||
5102            (state == AUDIO_MODE_IN_COMMUNICATION));
5103}
5104
5105uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5106{
5107    return MAX_EFFECTS_CPU_LOAD;
5108}
5109
5110uint32_t AudioPolicyManager::getMaxEffectsMemory()
5111{
5112    return MAX_EFFECTS_MEMORY;
5113}
5114
5115
5116// --- AudioOutputDescriptor class implementation
5117
5118AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5119        const sp<IOProfile>& profile)
5120    : mId(0), mIoHandle(0), mLatency(0),
5121    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5122    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5123{
5124    // clear usage count for all stream types
5125    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5126        mRefCount[i] = 0;
5127        mCurVolume[i] = -1.0;
5128        mMuteCount[i] = 0;
5129        mStopTime[i] = 0;
5130    }
5131    for (int i = 0; i < NUM_STRATEGIES; i++) {
5132        mStrategyMutedByDevice[i] = false;
5133    }
5134    if (profile != NULL) {
5135        mFlags = profile->mFlags;
5136        mSamplingRate = profile->pickSamplingRate();
5137        mFormat = profile->pickFormat();
5138        mChannelMask = profile->pickChannelMask();
5139        if (profile->mGains.size() > 0) {
5140            profile->mGains[0]->getDefaultConfig(&mGain);
5141        }
5142    }
5143}
5144
5145audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5146{
5147    if (isDuplicated()) {
5148        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5149    } else {
5150        return mDevice;
5151    }
5152}
5153
5154uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5155{
5156    if (isDuplicated()) {
5157        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5158    } else {
5159        return mLatency;
5160    }
5161}
5162
5163bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5164        const sp<AudioOutputDescriptor> outputDesc)
5165{
5166    if (isDuplicated()) {
5167        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5168    } else if (outputDesc->isDuplicated()){
5169        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5170    } else {
5171        return (mProfile->mModule == outputDesc->mProfile->mModule);
5172    }
5173}
5174
5175void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5176                                                                   int delta)
5177{
5178    // forward usage count change to attached outputs
5179    if (isDuplicated()) {
5180        mOutput1->changeRefCount(stream, delta);
5181        mOutput2->changeRefCount(stream, delta);
5182    }
5183    if ((delta + (int)mRefCount[stream]) < 0) {
5184        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5185              delta, stream, mRefCount[stream]);
5186        mRefCount[stream] = 0;
5187        return;
5188    }
5189    mRefCount[stream] += delta;
5190    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5191}
5192
5193audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5194{
5195    if (isDuplicated()) {
5196        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5197    } else {
5198        return mProfile->mSupportedDevices.types() ;
5199    }
5200}
5201
5202bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5203{
5204    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5205}
5206
5207bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5208                                                                       uint32_t inPastMs,
5209                                                                       nsecs_t sysTime) const
5210{
5211    if ((sysTime == 0) && (inPastMs != 0)) {
5212        sysTime = systemTime();
5213    }
5214    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5215        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5216                (NUM_STRATEGIES == strategy)) &&
5217                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5218            return true;
5219        }
5220    }
5221    return false;
5222}
5223
5224bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5225                                                                       uint32_t inPastMs,
5226                                                                       nsecs_t sysTime) const
5227{
5228    if (mRefCount[stream] != 0) {
5229        return true;
5230    }
5231    if (inPastMs == 0) {
5232        return false;
5233    }
5234    if (sysTime == 0) {
5235        sysTime = systemTime();
5236    }
5237    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5238        return true;
5239    }
5240    return false;
5241}
5242
5243void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5244                                                 struct audio_port_config *dstConfig,
5245                                                 const struct audio_port_config *srcConfig) const
5246{
5247    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5248
5249    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5250                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5251    if (srcConfig != NULL) {
5252        dstConfig->config_mask |= srcConfig->config_mask;
5253    }
5254    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5255
5256    dstConfig->id = mId;
5257    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5258    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5259    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5260    dstConfig->ext.mix.handle = mIoHandle;
5261    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5262}
5263
5264void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5265                                                    struct audio_port *port) const
5266{
5267    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5268    mProfile->toAudioPort(port);
5269    port->id = mId;
5270    toAudioPortConfig(&port->active_config);
5271    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5272    port->ext.mix.handle = mIoHandle;
5273    port->ext.mix.latency_class =
5274            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5275}
5276
5277status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5278{
5279    const size_t SIZE = 256;
5280    char buffer[SIZE];
5281    String8 result;
5282
5283    snprintf(buffer, SIZE, " ID: %d\n", mId);
5284    result.append(buffer);
5285    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5286    result.append(buffer);
5287    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5288    result.append(buffer);
5289    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5290    result.append(buffer);
5291    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5292    result.append(buffer);
5293    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5294    result.append(buffer);
5295    snprintf(buffer, SIZE, " Devices %08x\n", device());
5296    result.append(buffer);
5297    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5298    result.append(buffer);
5299    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5300        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5301                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5302        result.append(buffer);
5303    }
5304    write(fd, result.string(), result.size());
5305
5306    return NO_ERROR;
5307}
5308
5309// --- AudioInputDescriptor class implementation
5310
5311AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5312    : mId(0), mIoHandle(0),
5313      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5314      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5315{
5316    if (profile != NULL) {
5317        mSamplingRate = profile->pickSamplingRate();
5318        mFormat = profile->pickFormat();
5319        mChannelMask = profile->pickChannelMask();
5320        if (profile->mGains.size() > 0) {
5321            profile->mGains[0]->getDefaultConfig(&mGain);
5322        }
5323    }
5324}
5325
5326void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5327                                                   struct audio_port_config *dstConfig,
5328                                                   const struct audio_port_config *srcConfig) const
5329{
5330    ALOG_ASSERT(mProfile != 0,
5331                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5332    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5333                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5334    if (srcConfig != NULL) {
5335        dstConfig->config_mask |= srcConfig->config_mask;
5336    }
5337
5338    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5339
5340    dstConfig->id = mId;
5341    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5342    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5343    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5344    dstConfig->ext.mix.handle = mIoHandle;
5345    dstConfig->ext.mix.usecase.source = mInputSource;
5346}
5347
5348void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5349                                                    struct audio_port *port) const
5350{
5351    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5352
5353    mProfile->toAudioPort(port);
5354    port->id = mId;
5355    toAudioPortConfig(&port->active_config);
5356    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5357    port->ext.mix.handle = mIoHandle;
5358    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5359}
5360
5361status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5362{
5363    const size_t SIZE = 256;
5364    char buffer[SIZE];
5365    String8 result;
5366
5367    snprintf(buffer, SIZE, " ID: %d\n", mId);
5368    result.append(buffer);
5369    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5370    result.append(buffer);
5371    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5372    result.append(buffer);
5373    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5374    result.append(buffer);
5375    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5376    result.append(buffer);
5377    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5378    result.append(buffer);
5379    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5380    result.append(buffer);
5381
5382    write(fd, result.string(), result.size());
5383
5384    return NO_ERROR;
5385}
5386
5387// --- StreamDescriptor class implementation
5388
5389AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5390    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5391{
5392    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5393}
5394
5395int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5396{
5397    device = AudioPolicyManager::getDeviceForVolume(device);
5398    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5399    if (mIndexCur.indexOfKey(device) < 0) {
5400        device = AUDIO_DEVICE_OUT_DEFAULT;
5401    }
5402    return mIndexCur.valueFor(device);
5403}
5404
5405void AudioPolicyManager::StreamDescriptor::dump(int fd)
5406{
5407    const size_t SIZE = 256;
5408    char buffer[SIZE];
5409    String8 result;
5410
5411    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5412             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5413    result.append(buffer);
5414    for (size_t i = 0; i < mIndexCur.size(); i++) {
5415        snprintf(buffer, SIZE, "%04x : %02d, ",
5416                 mIndexCur.keyAt(i),
5417                 mIndexCur.valueAt(i));
5418        result.append(buffer);
5419    }
5420    result.append("\n");
5421
5422    write(fd, result.string(), result.size());
5423}
5424
5425// --- EffectDescriptor class implementation
5426
5427status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5428{
5429    const size_t SIZE = 256;
5430    char buffer[SIZE];
5431    String8 result;
5432
5433    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5434    result.append(buffer);
5435    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5436    result.append(buffer);
5437    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5438    result.append(buffer);
5439    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5440    result.append(buffer);
5441    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5442    result.append(buffer);
5443    write(fd, result.string(), result.size());
5444
5445    return NO_ERROR;
5446}
5447
5448// --- HwModule class implementation
5449
5450AudioPolicyManager::HwModule::HwModule(const char *name)
5451    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5452      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5453{
5454}
5455
5456AudioPolicyManager::HwModule::~HwModule()
5457{
5458    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5459        mOutputProfiles[i]->mSupportedDevices.clear();
5460    }
5461    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5462        mInputProfiles[i]->mSupportedDevices.clear();
5463    }
5464    free((void *)mName);
5465}
5466
5467status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5468{
5469    cnode *node = root->first_child;
5470
5471    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5472
5473    while (node) {
5474        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5475            profile->loadSamplingRates((char *)node->value);
5476        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5477            profile->loadFormats((char *)node->value);
5478        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5479            profile->loadInChannels((char *)node->value);
5480        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5481            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5482                                                           mDeclaredDevices);
5483        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5484            profile->loadGains(node);
5485        }
5486        node = node->next;
5487    }
5488    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5489            "loadInput() invalid supported devices");
5490    ALOGW_IF(profile->mChannelMasks.size() == 0,
5491            "loadInput() invalid supported channel masks");
5492    ALOGW_IF(profile->mSamplingRates.size() == 0,
5493            "loadInput() invalid supported sampling rates");
5494    ALOGW_IF(profile->mFormats.size() == 0,
5495            "loadInput() invalid supported formats");
5496    if (!profile->mSupportedDevices.isEmpty() &&
5497            (profile->mChannelMasks.size() != 0) &&
5498            (profile->mSamplingRates.size() != 0) &&
5499            (profile->mFormats.size() != 0)) {
5500
5501        ALOGV("loadInput() adding input Supported Devices %04x",
5502              profile->mSupportedDevices.types());
5503
5504        mInputProfiles.add(profile);
5505        return NO_ERROR;
5506    } else {
5507        return BAD_VALUE;
5508    }
5509}
5510
5511status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5512{
5513    cnode *node = root->first_child;
5514
5515    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5516
5517    while (node) {
5518        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5519            profile->loadSamplingRates((char *)node->value);
5520        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5521            profile->loadFormats((char *)node->value);
5522        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5523            profile->loadOutChannels((char *)node->value);
5524        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5525            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5526                                                           mDeclaredDevices);
5527        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5528            profile->mFlags = parseFlagNames((char *)node->value);
5529        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5530            profile->loadGains(node);
5531        }
5532        node = node->next;
5533    }
5534    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5535            "loadOutput() invalid supported devices");
5536    ALOGW_IF(profile->mChannelMasks.size() == 0,
5537            "loadOutput() invalid supported channel masks");
5538    ALOGW_IF(profile->mSamplingRates.size() == 0,
5539            "loadOutput() invalid supported sampling rates");
5540    ALOGW_IF(profile->mFormats.size() == 0,
5541            "loadOutput() invalid supported formats");
5542    if (!profile->mSupportedDevices.isEmpty() &&
5543            (profile->mChannelMasks.size() != 0) &&
5544            (profile->mSamplingRates.size() != 0) &&
5545            (profile->mFormats.size() != 0)) {
5546
5547        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5548              profile->mSupportedDevices.types(), profile->mFlags);
5549
5550        mOutputProfiles.add(profile);
5551        return NO_ERROR;
5552    } else {
5553        return BAD_VALUE;
5554    }
5555}
5556
5557status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5558{
5559    cnode *node = root->first_child;
5560
5561    audio_devices_t type = AUDIO_DEVICE_NONE;
5562    while (node) {
5563        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5564            type = parseDeviceNames((char *)node->value);
5565            break;
5566        }
5567        node = node->next;
5568    }
5569    if (type == AUDIO_DEVICE_NONE ||
5570            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5571        ALOGW("loadDevice() bad type %08x", type);
5572        return BAD_VALUE;
5573    }
5574    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5575    deviceDesc->mModule = this;
5576
5577    node = root->first_child;
5578    while (node) {
5579        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5580            deviceDesc->mAddress = String8((char *)node->value);
5581        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5582            if (audio_is_input_device(type)) {
5583                deviceDesc->loadInChannels((char *)node->value);
5584            } else {
5585                deviceDesc->loadOutChannels((char *)node->value);
5586            }
5587        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5588            deviceDesc->loadGains(node);
5589        }
5590        node = node->next;
5591    }
5592
5593    ALOGV("loadDevice() adding device name %s type %08x address %s",
5594          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5595
5596    mDeclaredDevices.add(deviceDesc);
5597
5598    return NO_ERROR;
5599}
5600
5601void AudioPolicyManager::HwModule::dump(int fd)
5602{
5603    const size_t SIZE = 256;
5604    char buffer[SIZE];
5605    String8 result;
5606
5607    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5608    result.append(buffer);
5609    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5610    result.append(buffer);
5611    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5612    result.append(buffer);
5613    write(fd, result.string(), result.size());
5614    if (mOutputProfiles.size()) {
5615        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5616        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5617            snprintf(buffer, SIZE, "    output %zu:\n", i);
5618            write(fd, buffer, strlen(buffer));
5619            mOutputProfiles[i]->dump(fd);
5620        }
5621    }
5622    if (mInputProfiles.size()) {
5623        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5624        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5625            snprintf(buffer, SIZE, "    input %zu:\n", i);
5626            write(fd, buffer, strlen(buffer));
5627            mInputProfiles[i]->dump(fd);
5628        }
5629    }
5630    if (mDeclaredDevices.size()) {
5631        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5632        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5633            mDeclaredDevices[i]->dump(fd, 4, i);
5634        }
5635    }
5636}
5637
5638// --- AudioPort class implementation
5639
5640
5641AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5642          audio_port_role_t role, const sp<HwModule>& module) :
5643    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5644{
5645    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5646                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5647}
5648
5649void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5650{
5651    port->role = mRole;
5652    port->type = mType;
5653    unsigned int i;
5654    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5655        if (mSamplingRates[i] != 0) {
5656            port->sample_rates[i] = mSamplingRates[i];
5657        }
5658    }
5659    port->num_sample_rates = i;
5660    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5661        if (mChannelMasks[i] != 0) {
5662            port->channel_masks[i] = mChannelMasks[i];
5663        }
5664    }
5665    port->num_channel_masks = i;
5666    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5667        if (mFormats[i] != 0) {
5668            port->formats[i] = mFormats[i];
5669        }
5670    }
5671    port->num_formats = i;
5672
5673    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5674
5675    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5676        port->gains[i] = mGains[i]->mGain;
5677    }
5678    port->num_gains = i;
5679}
5680
5681void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
5682    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
5683        const uint32_t rate = port->mSamplingRates.itemAt(k);
5684        if (rate != 0) { // skip "dynamic" rates
5685            bool hasRate = false;
5686            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
5687                if (rate == mSamplingRates.itemAt(l)) {
5688                    hasRate = true;
5689                    break;
5690                }
5691            }
5692            if (!hasRate) { // never import a sampling rate twice
5693                mSamplingRates.add(rate);
5694            }
5695        }
5696    }
5697    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
5698        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
5699        if (mask != 0) { // skip "dynamic" masks
5700            bool hasMask = false;
5701            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
5702                if (mask == mChannelMasks.itemAt(l)) {
5703                    hasMask = true;
5704                    break;
5705                }
5706            }
5707            if (!hasMask) { // never import a channel mask twice
5708                mChannelMasks.add(mask);
5709            }
5710        }
5711    }
5712    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
5713        const audio_format_t format = port->mFormats.itemAt(k);
5714        if (format != 0) { // skip "dynamic" formats
5715            bool hasFormat = false;
5716            for (size_t l = 0 ; l < mFormats.size() ; l++) {
5717                if (format == mFormats.itemAt(l)) {
5718                    hasFormat = true;
5719                    break;
5720                }
5721            }
5722            if (!hasFormat) { // never import a channel mask twice
5723                mFormats.add(format);
5724            }
5725        }
5726    }
5727}
5728
5729void AudioPolicyManager::AudioPort::clearCapabilities() {
5730    mChannelMasks.clear();
5731    mFormats.clear();
5732    mSamplingRates.clear();
5733}
5734
5735void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5736{
5737    char *str = strtok(name, "|");
5738
5739    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5740    // rates should be read from the output stream after it is opened for the first time
5741    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5742        mSamplingRates.add(0);
5743        return;
5744    }
5745
5746    while (str != NULL) {
5747        uint32_t rate = atoi(str);
5748        if (rate != 0) {
5749            ALOGV("loadSamplingRates() adding rate %d", rate);
5750            mSamplingRates.add(rate);
5751        }
5752        str = strtok(NULL, "|");
5753    }
5754}
5755
5756void AudioPolicyManager::AudioPort::loadFormats(char *name)
5757{
5758    char *str = strtok(name, "|");
5759
5760    // by convention, "0' in the first entry in mFormats indicates the supported formats
5761    // should be read from the output stream after it is opened for the first time
5762    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5763        mFormats.add(AUDIO_FORMAT_DEFAULT);
5764        return;
5765    }
5766
5767    while (str != NULL) {
5768        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5769                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5770                                                             str);
5771        if (format != AUDIO_FORMAT_DEFAULT) {
5772            mFormats.add(format);
5773        }
5774        str = strtok(NULL, "|");
5775    }
5776}
5777
5778void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5779{
5780    const char *str = strtok(name, "|");
5781
5782    ALOGV("loadInChannels() %s", name);
5783
5784    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5785        mChannelMasks.add(0);
5786        return;
5787    }
5788
5789    while (str != NULL) {
5790        audio_channel_mask_t channelMask =
5791                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5792                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5793                                                   str);
5794        if (channelMask != 0) {
5795            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5796            mChannelMasks.add(channelMask);
5797        }
5798        str = strtok(NULL, "|");
5799    }
5800}
5801
5802void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5803{
5804    const char *str = strtok(name, "|");
5805
5806    ALOGV("loadOutChannels() %s", name);
5807
5808    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5809    // masks should be read from the output stream after it is opened for the first time
5810    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5811        mChannelMasks.add(0);
5812        return;
5813    }
5814
5815    while (str != NULL) {
5816        audio_channel_mask_t channelMask =
5817                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5818                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5819                                                   str);
5820        if (channelMask != 0) {
5821            mChannelMasks.add(channelMask);
5822        }
5823        str = strtok(NULL, "|");
5824    }
5825    return;
5826}
5827
5828audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5829{
5830    const char *str = strtok(name, "|");
5831
5832    ALOGV("loadGainMode() %s", name);
5833    audio_gain_mode_t mode = 0;
5834    while (str != NULL) {
5835        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5836                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5837                                                str);
5838        str = strtok(NULL, "|");
5839    }
5840    return mode;
5841}
5842
5843void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5844{
5845    cnode *node = root->first_child;
5846
5847    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5848
5849    while (node) {
5850        if (strcmp(node->name, GAIN_MODE) == 0) {
5851            gain->mGain.mode = loadGainMode((char *)node->value);
5852        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5853            if (mUseInChannelMask) {
5854                gain->mGain.channel_mask =
5855                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5856                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5857                                                           (char *)node->value);
5858            } else {
5859                gain->mGain.channel_mask =
5860                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5861                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5862                                                           (char *)node->value);
5863            }
5864        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5865            gain->mGain.min_value = atoi((char *)node->value);
5866        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5867            gain->mGain.max_value = atoi((char *)node->value);
5868        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5869            gain->mGain.default_value = atoi((char *)node->value);
5870        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5871            gain->mGain.step_value = atoi((char *)node->value);
5872        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5873            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5874        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5875            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5876        }
5877        node = node->next;
5878    }
5879
5880    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5881          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5882
5883    if (gain->mGain.mode == 0) {
5884        return;
5885    }
5886    mGains.add(gain);
5887}
5888
5889void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5890{
5891    cnode *node = root->first_child;
5892    int index = 0;
5893    while (node) {
5894        ALOGV("loadGains() loading gain %s", node->name);
5895        loadGain(node, index++);
5896        node = node->next;
5897    }
5898}
5899
5900status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5901{
5902    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5903        if (mSamplingRates[i] == samplingRate) {
5904            return NO_ERROR;
5905        }
5906    }
5907    return BAD_VALUE;
5908}
5909
5910status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5911        uint32_t *updatedSamplingRate) const
5912{
5913    // Search for the closest supported sampling rate that is above (preferred)
5914    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5915    // The sampling rates do not need to be sorted in ascending order.
5916    ssize_t maxBelow = -1;
5917    ssize_t minAbove = -1;
5918    uint32_t candidate;
5919    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5920        candidate = mSamplingRates[i];
5921        if (candidate == samplingRate) {
5922            if (updatedSamplingRate != NULL) {
5923                *updatedSamplingRate = candidate;
5924            }
5925            return NO_ERROR;
5926        }
5927        // candidate < desired
5928        if (candidate < samplingRate) {
5929            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5930                maxBelow = i;
5931            }
5932        // candidate > desired
5933        } else {
5934            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5935                minAbove = i;
5936            }
5937        }
5938    }
5939    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5940    // TODO Move these assumptions out.
5941    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5942    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5943                                                    // due to approximation by an int32_t of the
5944                                                    // phase increments
5945    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5946    if (minAbove >= 0) {
5947        candidate = mSamplingRates[minAbove];
5948        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5949            if (updatedSamplingRate != NULL) {
5950                *updatedSamplingRate = candidate;
5951            }
5952            return NO_ERROR;
5953        }
5954    }
5955    // But if we have to up-sample from a lower sampling rate, that's OK.
5956    if (maxBelow >= 0) {
5957        candidate = mSamplingRates[maxBelow];
5958        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5959            if (updatedSamplingRate != NULL) {
5960                *updatedSamplingRate = candidate;
5961            }
5962            return NO_ERROR;
5963        }
5964    }
5965    // leave updatedSamplingRate unmodified
5966    return BAD_VALUE;
5967}
5968
5969status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5970{
5971    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5972        if (mChannelMasks[i] == channelMask) {
5973            return NO_ERROR;
5974        }
5975    }
5976    return BAD_VALUE;
5977}
5978
5979status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5980        const
5981{
5982    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5983    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5984        // FIXME Does not handle multi-channel automatic conversions yet
5985        audio_channel_mask_t supported = mChannelMasks[i];
5986        if (supported == channelMask) {
5987            return NO_ERROR;
5988        }
5989        if (isRecordThread) {
5990            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5991            // FIXME Abstract this out to a table.
5992            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5993                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5994                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5995                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5996                return NO_ERROR;
5997            }
5998        }
5999    }
6000    return BAD_VALUE;
6001}
6002
6003status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6004{
6005    for (size_t i = 0; i < mFormats.size(); i ++) {
6006        if (mFormats[i] == format) {
6007            return NO_ERROR;
6008        }
6009    }
6010    return BAD_VALUE;
6011}
6012
6013
6014uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6015{
6016    // special case for uninitialized dynamic profile
6017    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6018        return 0;
6019    }
6020
6021    uint32_t samplingRate = 0;
6022    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6023
6024    // For mixed output and inputs, use max mixer sampling rates. Do not
6025    // limit sampling rate otherwise
6026    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6027            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6028            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
6029        maxRate = UINT_MAX;
6030    }
6031    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6032        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6033            samplingRate = mSamplingRates[i];
6034        }
6035    }
6036    return samplingRate;
6037}
6038
6039audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6040{
6041    // special case for uninitialized dynamic profile
6042    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6043        return AUDIO_CHANNEL_NONE;
6044    }
6045
6046    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6047    uint32_t channelCount = 0;
6048    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6049
6050    // For mixed output and inputs, use max mixer channel count. Do not
6051    // limit channel count otherwise
6052    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6053            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6054            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
6055        maxCount = UINT_MAX;
6056    }
6057    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6058        uint32_t cnlCount;
6059        if (mUseInChannelMask) {
6060            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6061        } else {
6062            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6063        }
6064        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6065            channelMask = mChannelMasks[i];
6066        }
6067    }
6068    return channelMask;
6069}
6070
6071/* format in order of increasing preference */
6072const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6073        AUDIO_FORMAT_DEFAULT,
6074        AUDIO_FORMAT_PCM_16_BIT,
6075        AUDIO_FORMAT_PCM_8_24_BIT,
6076        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6077        AUDIO_FORMAT_PCM_32_BIT,
6078        AUDIO_FORMAT_PCM_FLOAT,
6079};
6080
6081int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6082                                                  audio_format_t format2)
6083{
6084    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6085    // compressed format and better than any PCM format. This is by design of pickFormat()
6086    if (!audio_is_linear_pcm(format1)) {
6087        if (!audio_is_linear_pcm(format2)) {
6088            return 0;
6089        }
6090        return 1;
6091    }
6092    if (!audio_is_linear_pcm(format2)) {
6093        return -1;
6094    }
6095
6096    int index1 = -1, index2 = -1;
6097    for (size_t i = 0;
6098            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6099            i ++) {
6100        if (sPcmFormatCompareTable[i] == format1) {
6101            index1 = i;
6102        }
6103        if (sPcmFormatCompareTable[i] == format2) {
6104            index2 = i;
6105        }
6106    }
6107    // format1 not found => index1 < 0 => format2 > format1
6108    // format2 not found => index2 < 0 => format2 < format1
6109    return index1 - index2;
6110}
6111
6112audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6113{
6114    // special case for uninitialized dynamic profile
6115    if (mFormats.size() == 1 && mFormats[0] == 0) {
6116        return AUDIO_FORMAT_DEFAULT;
6117    }
6118
6119    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6120    audio_format_t bestFormat =
6121            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6122                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6123    // For mixed output and inputs, use best mixer output format. Do not
6124    // limit format otherwise
6125    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6126            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6127             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6128        bestFormat = AUDIO_FORMAT_INVALID;
6129    }
6130
6131    for (size_t i = 0; i < mFormats.size(); i ++) {
6132        if ((compareFormats(mFormats[i], format) > 0) &&
6133                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6134            format = mFormats[i];
6135        }
6136    }
6137    return format;
6138}
6139
6140status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6141                                                  int index) const
6142{
6143    if (index < 0 || (size_t)index >= mGains.size()) {
6144        return BAD_VALUE;
6145    }
6146    return mGains[index]->checkConfig(gainConfig);
6147}
6148
6149void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6150{
6151    const size_t SIZE = 256;
6152    char buffer[SIZE];
6153    String8 result;
6154
6155    if (mName.size() != 0) {
6156        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6157        result.append(buffer);
6158    }
6159
6160    if (mSamplingRates.size() != 0) {
6161        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6162        result.append(buffer);
6163        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6164            if (i == 0 && mSamplingRates[i] == 0) {
6165                snprintf(buffer, SIZE, "Dynamic");
6166            } else {
6167                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6168            }
6169            result.append(buffer);
6170            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6171        }
6172        result.append("\n");
6173    }
6174
6175    if (mChannelMasks.size() != 0) {
6176        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6177        result.append(buffer);
6178        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6179            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6180
6181            if (i == 0 && mChannelMasks[i] == 0) {
6182                snprintf(buffer, SIZE, "Dynamic");
6183            } else {
6184                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6185            }
6186            result.append(buffer);
6187            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6188        }
6189        result.append("\n");
6190    }
6191
6192    if (mFormats.size() != 0) {
6193        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6194        result.append(buffer);
6195        for (size_t i = 0; i < mFormats.size(); i++) {
6196            const char *formatStr = enumToString(sFormatNameToEnumTable,
6197                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6198                                                 mFormats[i]);
6199            if (i == 0 && strcmp(formatStr, "") == 0) {
6200                snprintf(buffer, SIZE, "Dynamic");
6201            } else {
6202                snprintf(buffer, SIZE, "%s", formatStr);
6203            }
6204            result.append(buffer);
6205            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6206        }
6207        result.append("\n");
6208    }
6209    write(fd, result.string(), result.size());
6210    if (mGains.size() != 0) {
6211        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6212        write(fd, buffer, strlen(buffer) + 1);
6213        result.append(buffer);
6214        for (size_t i = 0; i < mGains.size(); i++) {
6215            mGains[i]->dump(fd, spaces + 2, i);
6216        }
6217    }
6218}
6219
6220// --- AudioGain class implementation
6221
6222AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6223{
6224    mIndex = index;
6225    mUseInChannelMask = useInChannelMask;
6226    memset(&mGain, 0, sizeof(struct audio_gain));
6227}
6228
6229void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6230{
6231    config->index = mIndex;
6232    config->mode = mGain.mode;
6233    config->channel_mask = mGain.channel_mask;
6234    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6235        config->values[0] = mGain.default_value;
6236    } else {
6237        uint32_t numValues;
6238        if (mUseInChannelMask) {
6239            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6240        } else {
6241            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6242        }
6243        for (size_t i = 0; i < numValues; i++) {
6244            config->values[i] = mGain.default_value;
6245        }
6246    }
6247    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6248        config->ramp_duration_ms = mGain.min_ramp_ms;
6249    }
6250}
6251
6252status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6253{
6254    if ((config->mode & ~mGain.mode) != 0) {
6255        return BAD_VALUE;
6256    }
6257    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6258        if ((config->values[0] < mGain.min_value) ||
6259                    (config->values[0] > mGain.max_value)) {
6260            return BAD_VALUE;
6261        }
6262    } else {
6263        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6264            return BAD_VALUE;
6265        }
6266        uint32_t numValues;
6267        if (mUseInChannelMask) {
6268            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6269        } else {
6270            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6271        }
6272        for (size_t i = 0; i < numValues; i++) {
6273            if ((config->values[i] < mGain.min_value) ||
6274                    (config->values[i] > mGain.max_value)) {
6275                return BAD_VALUE;
6276            }
6277        }
6278    }
6279    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6280        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6281                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6282            return BAD_VALUE;
6283        }
6284    }
6285    return NO_ERROR;
6286}
6287
6288void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6289{
6290    const size_t SIZE = 256;
6291    char buffer[SIZE];
6292    String8 result;
6293
6294    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6295    result.append(buffer);
6296    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6297    result.append(buffer);
6298    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6299    result.append(buffer);
6300    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6301    result.append(buffer);
6302    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6303    result.append(buffer);
6304    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6305    result.append(buffer);
6306    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6307    result.append(buffer);
6308    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6309    result.append(buffer);
6310    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6311    result.append(buffer);
6312
6313    write(fd, result.string(), result.size());
6314}
6315
6316// --- AudioPortConfig class implementation
6317
6318AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6319{
6320    mSamplingRate = 0;
6321    mChannelMask = AUDIO_CHANNEL_NONE;
6322    mFormat = AUDIO_FORMAT_INVALID;
6323    mGain.index = -1;
6324}
6325
6326status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6327                                                        const struct audio_port_config *config,
6328                                                        struct audio_port_config *backupConfig)
6329{
6330    struct audio_port_config localBackupConfig;
6331    status_t status = NO_ERROR;
6332
6333    localBackupConfig.config_mask = config->config_mask;
6334    toAudioPortConfig(&localBackupConfig);
6335
6336    sp<AudioPort> audioport = getAudioPort();
6337    if (audioport == 0) {
6338        status = NO_INIT;
6339        goto exit;
6340    }
6341    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6342        status = audioport->checkExactSamplingRate(config->sample_rate);
6343        if (status != NO_ERROR) {
6344            goto exit;
6345        }
6346        mSamplingRate = config->sample_rate;
6347    }
6348    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6349        status = audioport->checkExactChannelMask(config->channel_mask);
6350        if (status != NO_ERROR) {
6351            goto exit;
6352        }
6353        mChannelMask = config->channel_mask;
6354    }
6355    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6356        status = audioport->checkFormat(config->format);
6357        if (status != NO_ERROR) {
6358            goto exit;
6359        }
6360        mFormat = config->format;
6361    }
6362    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6363        status = audioport->checkGain(&config->gain, config->gain.index);
6364        if (status != NO_ERROR) {
6365            goto exit;
6366        }
6367        mGain = config->gain;
6368    }
6369
6370exit:
6371    if (status != NO_ERROR) {
6372        applyAudioPortConfig(&localBackupConfig);
6373    }
6374    if (backupConfig != NULL) {
6375        *backupConfig = localBackupConfig;
6376    }
6377    return status;
6378}
6379
6380void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6381                                                    struct audio_port_config *dstConfig,
6382                                                    const struct audio_port_config *srcConfig) const
6383{
6384    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6385        dstConfig->sample_rate = mSamplingRate;
6386        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6387            dstConfig->sample_rate = srcConfig->sample_rate;
6388        }
6389    } else {
6390        dstConfig->sample_rate = 0;
6391    }
6392    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6393        dstConfig->channel_mask = mChannelMask;
6394        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6395            dstConfig->channel_mask = srcConfig->channel_mask;
6396        }
6397    } else {
6398        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6399    }
6400    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6401        dstConfig->format = mFormat;
6402        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6403            dstConfig->format = srcConfig->format;
6404        }
6405    } else {
6406        dstConfig->format = AUDIO_FORMAT_INVALID;
6407    }
6408    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6409        dstConfig->gain = mGain;
6410        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6411            dstConfig->gain = srcConfig->gain;
6412        }
6413    } else {
6414        dstConfig->gain.index = -1;
6415    }
6416    if (dstConfig->gain.index != -1) {
6417        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6418    } else {
6419        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6420    }
6421}
6422
6423// --- IOProfile class implementation
6424
6425AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6426                                         const sp<HwModule>& module)
6427    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6428{
6429}
6430
6431AudioPolicyManager::IOProfile::~IOProfile()
6432{
6433}
6434
6435// checks if the IO profile is compatible with specified parameters.
6436// Sampling rate, format and channel mask must be specified in order to
6437// get a valid a match
6438bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6439                                                            uint32_t samplingRate,
6440                                                            uint32_t *updatedSamplingRate,
6441                                                            audio_format_t format,
6442                                                            audio_channel_mask_t channelMask,
6443                                                            audio_output_flags_t flags) const
6444{
6445    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6446    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6447    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6448
6449    if ((mSupportedDevices.types() & device) != device) {
6450        return false;
6451    }
6452
6453    if (samplingRate == 0) {
6454         return false;
6455    }
6456    uint32_t myUpdatedSamplingRate = samplingRate;
6457    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6458         return false;
6459    }
6460    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6461            NO_ERROR) {
6462         return false;
6463    }
6464
6465    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6466        return false;
6467    }
6468
6469    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6470            checkExactChannelMask(channelMask) != NO_ERROR)) {
6471        return false;
6472    }
6473    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6474            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6475        return false;
6476    }
6477
6478    if (isPlaybackThread && (mFlags & flags) != flags) {
6479        return false;
6480    }
6481    // The only input flag that is allowed to be different is the fast flag.
6482    // An existing fast stream is compatible with a normal track request.
6483    // An existing normal stream is compatible with a fast track request,
6484    // but the fast request will be denied by AudioFlinger and converted to normal track.
6485    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
6486            ~AUDIO_INPUT_FLAG_FAST)) {
6487        return false;
6488    }
6489
6490    if (updatedSamplingRate != NULL) {
6491        *updatedSamplingRate = myUpdatedSamplingRate;
6492    }
6493    return true;
6494}
6495
6496void AudioPolicyManager::IOProfile::dump(int fd)
6497{
6498    const size_t SIZE = 256;
6499    char buffer[SIZE];
6500    String8 result;
6501
6502    AudioPort::dump(fd, 4);
6503
6504    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6505    result.append(buffer);
6506    snprintf(buffer, SIZE, "    - devices:\n");
6507    result.append(buffer);
6508    write(fd, result.string(), result.size());
6509    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6510        mSupportedDevices[i]->dump(fd, 6, i);
6511    }
6512}
6513
6514void AudioPolicyManager::IOProfile::log()
6515{
6516    const size_t SIZE = 256;
6517    char buffer[SIZE];
6518    String8 result;
6519
6520    ALOGV("    - sampling rates: ");
6521    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6522        ALOGV("  %d", mSamplingRates[i]);
6523    }
6524
6525    ALOGV("    - channel masks: ");
6526    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6527        ALOGV("  0x%04x", mChannelMasks[i]);
6528    }
6529
6530    ALOGV("    - formats: ");
6531    for (size_t i = 0; i < mFormats.size(); i++) {
6532        ALOGV("  0x%08x", mFormats[i]);
6533    }
6534
6535    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6536    ALOGV("    - flags: 0x%04x\n", mFlags);
6537}
6538
6539
6540// --- DeviceDescriptor implementation
6541
6542
6543AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6544                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6545                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6546                                                              AUDIO_PORT_ROLE_SOURCE,
6547                             NULL),
6548                     mDeviceType(type), mAddress(""), mId(0)
6549{
6550    if (mGains.size() > 0) {
6551        mGains[0]->getDefaultConfig(&mGain);
6552    }
6553}
6554
6555bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6556{
6557    // Devices are considered equal if they:
6558    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6559    // - have the same address or one device does not specify the address
6560    // - have the same channel mask or one device does not specify the channel mask
6561    return (mDeviceType == other->mDeviceType) &&
6562           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6563           (mChannelMask == 0 || other->mChannelMask == 0 ||
6564                mChannelMask == other->mChannelMask);
6565}
6566
6567void AudioPolicyManager::DeviceVector::refreshTypes()
6568{
6569    mDeviceTypes = AUDIO_DEVICE_NONE;
6570    for(size_t i = 0; i < size(); i++) {
6571        mDeviceTypes |= itemAt(i)->mDeviceType;
6572    }
6573    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6574}
6575
6576ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6577{
6578    for(size_t i = 0; i < size(); i++) {
6579        if (item->equals(itemAt(i))) {
6580            return i;
6581        }
6582    }
6583    return -1;
6584}
6585
6586ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6587{
6588    ssize_t ret = indexOf(item);
6589
6590    if (ret < 0) {
6591        ret = SortedVector::add(item);
6592        if (ret >= 0) {
6593            refreshTypes();
6594        }
6595    } else {
6596        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6597        ret = -1;
6598    }
6599    return ret;
6600}
6601
6602ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6603{
6604    size_t i;
6605    ssize_t ret = indexOf(item);
6606
6607    if (ret < 0) {
6608        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6609    } else {
6610        ret = SortedVector::removeAt(ret);
6611        if (ret >= 0) {
6612            refreshTypes();
6613        }
6614    }
6615    return ret;
6616}
6617
6618void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6619{
6620    DeviceVector deviceList;
6621
6622    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6623    types &= ~role_bit;
6624
6625    while (types) {
6626        uint32_t i = 31 - __builtin_clz(types);
6627        uint32_t type = 1 << i;
6628        types &= ~type;
6629        add(new DeviceDescriptor(String8(""), type | role_bit));
6630    }
6631}
6632
6633void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6634                                                           const DeviceVector& declaredDevices)
6635{
6636    char *devName = strtok(name, "|");
6637    while (devName != NULL) {
6638        if (strlen(devName) != 0) {
6639            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6640                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6641                                 devName);
6642            if (type != AUDIO_DEVICE_NONE) {
6643                add(new DeviceDescriptor(String8(""), type));
6644            } else {
6645                sp<DeviceDescriptor> deviceDesc =
6646                        declaredDevices.getDeviceFromName(String8(devName));
6647                if (deviceDesc != 0) {
6648                    add(deviceDesc);
6649                }
6650            }
6651         }
6652        devName = strtok(NULL, "|");
6653     }
6654}
6655
6656sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6657                                                        audio_devices_t type, String8 address) const
6658{
6659    sp<DeviceDescriptor> device;
6660    for (size_t i = 0; i < size(); i++) {
6661        if (itemAt(i)->mDeviceType == type) {
6662            device = itemAt(i);
6663            if (itemAt(i)->mAddress = address) {
6664                break;
6665            }
6666        }
6667    }
6668    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6669          type, address.string(), device.get());
6670    return device;
6671}
6672
6673sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6674                                                                    audio_port_handle_t id) const
6675{
6676    sp<DeviceDescriptor> device;
6677    for (size_t i = 0; i < size(); i++) {
6678        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6679        if (itemAt(i)->mId == id) {
6680            device = itemAt(i);
6681            break;
6682        }
6683    }
6684    return device;
6685}
6686
6687AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6688                                                                        audio_devices_t type) const
6689{
6690    DeviceVector devices;
6691    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6692        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6693            devices.add(itemAt(i));
6694            type &= ~itemAt(i)->mDeviceType;
6695            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6696                  itemAt(i)->mDeviceType, itemAt(i).get());
6697        }
6698    }
6699    return devices;
6700}
6701
6702AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6703        audio_devices_t type, String8 address) const
6704{
6705    DeviceVector devices;
6706    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6707    for (size_t i = 0; i < size(); i++) {
6708        //ALOGV("     at i=%d: device=%x, addr=%s",
6709        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6710        if (itemAt(i)->mDeviceType == type) {
6711            if (itemAt(i)->mAddress == address) {
6712                //ALOGV("      found matching address %s", address.string());
6713                devices.add(itemAt(i));
6714            }
6715        }
6716    }
6717    return devices;
6718}
6719
6720sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6721        const String8& name) const
6722{
6723    sp<DeviceDescriptor> device;
6724    for (size_t i = 0; i < size(); i++) {
6725        if (itemAt(i)->mName == name) {
6726            device = itemAt(i);
6727            break;
6728        }
6729    }
6730    return device;
6731}
6732
6733void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6734                                                    struct audio_port_config *dstConfig,
6735                                                    const struct audio_port_config *srcConfig) const
6736{
6737    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6738    if (srcConfig != NULL) {
6739        dstConfig->config_mask |= srcConfig->config_mask;
6740    }
6741
6742    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6743
6744    dstConfig->id = mId;
6745    dstConfig->role = audio_is_output_device(mDeviceType) ?
6746                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6747    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6748    dstConfig->ext.device.type = mDeviceType;
6749    dstConfig->ext.device.hw_module = mModule->mHandle;
6750    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6751}
6752
6753void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6754{
6755    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6756    AudioPort::toAudioPort(port);
6757    port->id = mId;
6758    toAudioPortConfig(&port->active_config);
6759    port->ext.device.type = mDeviceType;
6760    port->ext.device.hw_module = mModule->mHandle;
6761    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6762}
6763
6764status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6765{
6766    const size_t SIZE = 256;
6767    char buffer[SIZE];
6768    String8 result;
6769
6770    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6771    result.append(buffer);
6772    if (mId != 0) {
6773        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6774        result.append(buffer);
6775    }
6776    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6777                                              enumToString(sDeviceNameToEnumTable,
6778                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6779                                                           mDeviceType));
6780    result.append(buffer);
6781    if (mAddress.size() != 0) {
6782        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6783        result.append(buffer);
6784    }
6785    write(fd, result.string(), result.size());
6786    AudioPort::dump(fd, spaces);
6787
6788    return NO_ERROR;
6789}
6790
6791status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
6792{
6793    const size_t SIZE = 256;
6794    char buffer[SIZE];
6795    String8 result;
6796
6797
6798    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
6799    result.append(buffer);
6800    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
6801    result.append(buffer);
6802    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
6803    result.append(buffer);
6804    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
6805    result.append(buffer);
6806    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
6807    result.append(buffer);
6808    for (size_t i = 0; i < mPatch.num_sources; i++) {
6809        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
6810            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6811                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
6812                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6813                                                        mPatch.sources[i].ext.device.type));
6814        } else {
6815            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6816                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
6817        }
6818        result.append(buffer);
6819    }
6820    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
6821    result.append(buffer);
6822    for (size_t i = 0; i < mPatch.num_sinks; i++) {
6823        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
6824            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6825                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
6826                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6827                                                        mPatch.sinks[i].ext.device.type));
6828        } else {
6829            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6830                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
6831        }
6832        result.append(buffer);
6833    }
6834
6835    write(fd, result.string(), result.size());
6836    return NO_ERROR;
6837}
6838
6839// --- audio_policy.conf file parsing
6840
6841audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6842{
6843    uint32_t flag = 0;
6844
6845    // it is OK to cast name to non const here as we are not going to use it after
6846    // strtok() modifies it
6847    char *flagName = strtok(name, "|");
6848    while (flagName != NULL) {
6849        if (strlen(flagName) != 0) {
6850            flag |= stringToEnum(sFlagNameToEnumTable,
6851                               ARRAY_SIZE(sFlagNameToEnumTable),
6852                               flagName);
6853        }
6854        flagName = strtok(NULL, "|");
6855    }
6856    //force direct flag if offload flag is set: offloading implies a direct output stream
6857    // and all common behaviors are driven by checking only the direct flag
6858    // this should normally be set appropriately in the policy configuration file
6859    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6860        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6861    }
6862
6863    return (audio_output_flags_t)flag;
6864}
6865
6866audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6867{
6868    uint32_t device = 0;
6869
6870    char *devName = strtok(name, "|");
6871    while (devName != NULL) {
6872        if (strlen(devName) != 0) {
6873            device |= stringToEnum(sDeviceNameToEnumTable,
6874                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6875                                 devName);
6876         }
6877        devName = strtok(NULL, "|");
6878     }
6879    return device;
6880}
6881
6882void AudioPolicyManager::loadHwModule(cnode *root)
6883{
6884    status_t status = NAME_NOT_FOUND;
6885    cnode *node;
6886    sp<HwModule> module = new HwModule(root->name);
6887
6888    node = config_find(root, DEVICES_TAG);
6889    if (node != NULL) {
6890        node = node->first_child;
6891        while (node) {
6892            ALOGV("loadHwModule() loading device %s", node->name);
6893            status_t tmpStatus = module->loadDevice(node);
6894            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6895                status = tmpStatus;
6896            }
6897            node = node->next;
6898        }
6899    }
6900    node = config_find(root, OUTPUTS_TAG);
6901    if (node != NULL) {
6902        node = node->first_child;
6903        while (node) {
6904            ALOGV("loadHwModule() loading output %s", node->name);
6905            status_t tmpStatus = module->loadOutput(node);
6906            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6907                status = tmpStatus;
6908            }
6909            node = node->next;
6910        }
6911    }
6912    node = config_find(root, INPUTS_TAG);
6913    if (node != NULL) {
6914        node = node->first_child;
6915        while (node) {
6916            ALOGV("loadHwModule() loading input %s", node->name);
6917            status_t tmpStatus = module->loadInput(node);
6918            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6919                status = tmpStatus;
6920            }
6921            node = node->next;
6922        }
6923    }
6924    loadGlobalConfig(root, module);
6925
6926    if (status == NO_ERROR) {
6927        mHwModules.add(module);
6928    }
6929}
6930
6931void AudioPolicyManager::loadHwModules(cnode *root)
6932{
6933    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6934    if (node == NULL) {
6935        return;
6936    }
6937
6938    node = node->first_child;
6939    while (node) {
6940        ALOGV("loadHwModules() loading module %s", node->name);
6941        loadHwModule(node);
6942        node = node->next;
6943    }
6944}
6945
6946void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6947{
6948    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6949
6950    if (node == NULL) {
6951        return;
6952    }
6953    DeviceVector declaredDevices;
6954    if (module != NULL) {
6955        declaredDevices = module->mDeclaredDevices;
6956    }
6957
6958    node = node->first_child;
6959    while (node) {
6960        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6961            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6962                                                        declaredDevices);
6963            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6964                  mAvailableOutputDevices.types());
6965        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6966            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6967                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6968                                              (char *)node->value);
6969            if (device != AUDIO_DEVICE_NONE) {
6970                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6971            } else {
6972                ALOGW("loadGlobalConfig() default device not specified");
6973            }
6974            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6975        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6976            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6977                                                       declaredDevices);
6978            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6979        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6980            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6981            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6982        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6983            uint32_t major, minor;
6984            sscanf((char *)node->value, "%u.%u", &major, &minor);
6985            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6986            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6987                  module->mHalVersion, major, minor);
6988        }
6989        node = node->next;
6990    }
6991}
6992
6993status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6994{
6995    cnode *root;
6996    char *data;
6997
6998    data = (char *)load_file(path, NULL);
6999    if (data == NULL) {
7000        return -ENODEV;
7001    }
7002    root = config_node("", "");
7003    config_load(root, data);
7004
7005    loadHwModules(root);
7006    // legacy audio_policy.conf files have one global_configuration section
7007    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7008    config_free(root);
7009    free(root);
7010    free(data);
7011
7012    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7013
7014    return NO_ERROR;
7015}
7016
7017void AudioPolicyManager::defaultAudioPolicyConfig(void)
7018{
7019    sp<HwModule> module;
7020    sp<IOProfile> profile;
7021    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7022                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7023    mAvailableOutputDevices.add(mDefaultOutputDevice);
7024    mAvailableInputDevices.add(defaultInputDevice);
7025
7026    module = new HwModule("primary");
7027
7028    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7029    profile->mSamplingRates.add(44100);
7030    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7031    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7032    profile->mSupportedDevices.add(mDefaultOutputDevice);
7033    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7034    module->mOutputProfiles.add(profile);
7035
7036    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7037    profile->mSamplingRates.add(8000);
7038    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7039    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7040    profile->mSupportedDevices.add(defaultInputDevice);
7041    module->mInputProfiles.add(profile);
7042
7043    mHwModules.add(module);
7044}
7045
7046audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7047{
7048    // flags to stream type mapping
7049    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7050        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7051    }
7052    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7053        return AUDIO_STREAM_BLUETOOTH_SCO;
7054    }
7055
7056    // usage to stream type mapping
7057    switch (attr->usage) {
7058    case AUDIO_USAGE_MEDIA:
7059    case AUDIO_USAGE_GAME:
7060    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7061    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7062        return AUDIO_STREAM_MUSIC;
7063    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7064        return AUDIO_STREAM_SYSTEM;
7065    case AUDIO_USAGE_VOICE_COMMUNICATION:
7066        return AUDIO_STREAM_VOICE_CALL;
7067
7068    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7069        return AUDIO_STREAM_DTMF;
7070
7071    case AUDIO_USAGE_ALARM:
7072        return AUDIO_STREAM_ALARM;
7073    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7074        return AUDIO_STREAM_RING;
7075
7076    case AUDIO_USAGE_NOTIFICATION:
7077    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7078    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7079    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7080    case AUDIO_USAGE_NOTIFICATION_EVENT:
7081        return AUDIO_STREAM_NOTIFICATION;
7082
7083    case AUDIO_USAGE_UNKNOWN:
7084    default:
7085        return AUDIO_STREAM_MUSIC;
7086    }
7087}
7088}; // namespace android
7089