AudioPolicyManager.cpp revision f17026dfef596cf1c8008fda20f1f2ad23a3df3a 
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 device %x", device);
275            // remove device from available output devices
276            mAvailableOutputDevices.remove(devDesc);
277
278            checkOutputsForDevice(devDesc, state, outputs, address);
279            } break;
280
281        default:
282            ALOGE("setDeviceConnectionState() invalid state: %x", state);
283            return BAD_VALUE;
284        }
285
286        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
287        // output is suspended before any tracks are moved to it
288        checkA2dpSuspend();
289        checkOutputForAllStrategies();
290        // outputs must be closed after checkOutputForAllStrategies() is executed
291        if (!outputs.isEmpty()) {
292            for (size_t i = 0; i < outputs.size(); i++) {
293                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
294                // close unused outputs after device disconnection or direct outputs that have been
295                // opened by checkOutputsForDevice() to query dynamic parameters
296                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
297                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
298                         (desc->mDirectOpenCount == 0))) {
299                    closeOutput(outputs[i]);
300                }
301            }
302            // check again after closing A2DP output to reset mA2dpSuspended if needed
303            checkA2dpSuspend();
304        }
305
306        updateDevicesAndOutputs();
307        if (mPhoneState == AUDIO_MODE_IN_CALL) {
308            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
309            updateCallRouting(newDevice);
310        }
311        for (size_t i = 0; i < mOutputs.size(); i++) {
312            audio_io_handle_t output = mOutputs.keyAt(i);
313            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
314                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
315                                                               true /*fromCache*/);
316                // do not force device change on duplicated output because if device is 0, it will
317                // also force a device 0 for the two outputs it is duplicated to which may override
318                // a valid device selection on those outputs.
319                bool force = !mOutputs.valueAt(i)->isDuplicated()
320                        && (!deviceDistinguishesOnAddress(device)
321                                // always force when disconnecting (a non-duplicated device)
322                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
323                setOutputDevice(output, newDevice, force, 0);
324            }
325        }
326
327        mpClientInterface->onAudioPortListUpdate();
328        return NO_ERROR;
329    }  // end if is output device
330
331    // handle input devices
332    if (audio_is_input_device(device)) {
333        SortedVector <audio_io_handle_t> inputs;
334
335        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
336        devDesc->mAddress = address;
337        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
338        switch (state)
339        {
340        // handle input device connection
341        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
342            if (index >= 0) {
343                ALOGW("setDeviceConnectionState() device already connected: %d", device);
344                return INVALID_OPERATION;
345            }
346            sp<HwModule> module = getModuleForDevice(device);
347            if (module == NULL) {
348                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
349                      device);
350                return INVALID_OPERATION;
351            }
352            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
353                return INVALID_OPERATION;
354            }
355
356            index = mAvailableInputDevices.add(devDesc);
357            if (index >= 0) {
358                mAvailableInputDevices[index]->mId = nextUniqueId();
359                mAvailableInputDevices[index]->mModule = module;
360            } else {
361                return NO_MEMORY;
362            }
363        } break;
364
365        // handle input device disconnection
366        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
367            if (index < 0) {
368                ALOGW("setDeviceConnectionState() device not connected: %d", device);
369                return INVALID_OPERATION;
370            }
371            checkInputsForDevice(device, state, inputs, address);
372            mAvailableInputDevices.remove(devDesc);
373        } break;
374
375        default:
376            ALOGE("setDeviceConnectionState() invalid state: %x", state);
377            return BAD_VALUE;
378        }
379
380        closeAllInputs();
381
382        if (mPhoneState == AUDIO_MODE_IN_CALL) {
383            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
384            updateCallRouting(newDevice);
385        }
386
387        mpClientInterface->onAudioPortListUpdate();
388        return NO_ERROR;
389    } // end if is input device
390
391    ALOGW("setDeviceConnectionState() invalid device: %x", device);
392    return BAD_VALUE;
393}
394
395audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
396                                                  const char *device_address)
397{
398    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
399    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
400    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
401    ssize_t index;
402    DeviceVector *deviceVector;
403
404    if (audio_is_output_device(device)) {
405        deviceVector = &mAvailableOutputDevices;
406    } else if (audio_is_input_device(device)) {
407        deviceVector = &mAvailableInputDevices;
408    } else {
409        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
410        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
411    }
412
413    index = deviceVector->indexOf(devDesc);
414    if (index >= 0) {
415        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
416    } else {
417        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
418    }
419}
420
421void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
422{
423    bool createTxPatch = false;
424    struct audio_patch patch;
425    patch.num_sources = 1;
426    patch.num_sinks = 1;
427    status_t status;
428    audio_patch_handle_t afPatchHandle;
429    DeviceVector deviceList;
430
431    audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
432    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
433
434    // release existing RX patch if any
435    if (mCallRxPatch != 0) {
436        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
437        mCallRxPatch.clear();
438    }
439    // release TX patch if any
440    if (mCallTxPatch != 0) {
441        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
442        mCallTxPatch.clear();
443    }
444
445    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
446    // via setOutputDevice() on primary output.
447    // Otherwise, create two audio patches for TX and RX path.
448    if (availablePrimaryOutputDevices() & rxDevice) {
449        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
450        // If the TX device is also on the primary HW module, setOutputDevice() will take care
451        // of it due to legacy implementation. If not, create a patch.
452        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
453                == AUDIO_DEVICE_NONE) {
454            createTxPatch = true;
455        }
456    } else {
457        // create RX path audio patch
458        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
459        ALOG_ASSERT(!deviceList.isEmpty(),
460                    "updateCallRouting() selected device not in output device list");
461        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
462        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
463        ALOG_ASSERT(!deviceList.isEmpty(),
464                    "updateCallRouting() no telephony RX device");
465        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
466
467        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
468        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
469
470        // request to reuse existing output stream if one is already opened to reach the RX device
471        SortedVector<audio_io_handle_t> outputs =
472                                getOutputsForDevice(rxDevice, mOutputs);
473        audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
474        if (output != AUDIO_IO_HANDLE_NONE) {
475            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
476            ALOG_ASSERT(!outputDesc->isDuplicated(),
477                        "updateCallRouting() RX device output is duplicated");
478            outputDesc->toAudioPortConfig(&patch.sources[1]);
479            patch.num_sources = 2;
480        }
481
482        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
483        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
484        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
485                                               status);
486        if (status == NO_ERROR) {
487            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
488                                       &patch, mUidCached);
489            mCallRxPatch->mAfPatchHandle = afPatchHandle;
490            mCallRxPatch->mUid = mUidCached;
491        }
492        createTxPatch = true;
493    }
494    if (createTxPatch) {
495
496        struct audio_patch patch;
497        patch.num_sources = 1;
498        patch.num_sinks = 1;
499        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
500        ALOG_ASSERT(!deviceList.isEmpty(),
501                    "updateCallRouting() selected device not in input device list");
502        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
503        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
504        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
505        ALOG_ASSERT(!deviceList.isEmpty(),
506                    "updateCallRouting() no telephony TX device");
507        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
508        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
509
510        SortedVector<audio_io_handle_t> outputs =
511                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
512        audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
513        // request to reuse existing output stream if one is already opened to reach the TX
514        // path output device
515        if (output != AUDIO_IO_HANDLE_NONE) {
516            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
517            ALOG_ASSERT(!outputDesc->isDuplicated(),
518                        "updateCallRouting() RX device output is duplicated");
519            outputDesc->toAudioPortConfig(&patch.sources[1]);
520            patch.num_sources = 2;
521        }
522
523        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
524        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
525        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
526                                               status);
527        if (status == NO_ERROR) {
528            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
529                                       &patch, mUidCached);
530            mCallTxPatch->mAfPatchHandle = afPatchHandle;
531            mCallTxPatch->mUid = mUidCached;
532        }
533    }
534}
535
536void AudioPolicyManager::setPhoneState(audio_mode_t state)
537{
538    ALOGV("setPhoneState() state %d", state);
539    if (state < 0 || state >= AUDIO_MODE_CNT) {
540        ALOGW("setPhoneState() invalid state %d", state);
541        return;
542    }
543
544    if (state == mPhoneState ) {
545        ALOGW("setPhoneState() setting same state %d", state);
546        return;
547    }
548
549    // if leaving call state, handle special case of active streams
550    // pertaining to sonification strategy see handleIncallSonification()
551    if (isInCall()) {
552        ALOGV("setPhoneState() in call state management: new state is %d", state);
553        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
554            handleIncallSonification((audio_stream_type_t)stream, false, true);
555        }
556    }
557
558    // store previous phone state for management of sonification strategy below
559    int oldState = mPhoneState;
560    mPhoneState = state;
561    bool force = false;
562
563    // are we entering or starting a call
564    if (!isStateInCall(oldState) && isStateInCall(state)) {
565        ALOGV("  Entering call in setPhoneState()");
566        // force routing command to audio hardware when starting a call
567        // even if no device change is needed
568        force = true;
569        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
570            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
571                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
572        }
573    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
574        ALOGV("  Exiting call in setPhoneState()");
575        // force routing command to audio hardware when exiting a call
576        // even if no device change is needed
577        force = true;
578        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
579            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
580                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
581        }
582    } else if (isStateInCall(state) && (state != oldState)) {
583        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
584        // force routing command to audio hardware when switching between telephony and VoIP
585        // even if no device change is needed
586        force = true;
587    }
588
589    // check for device and output changes triggered by new phone state
590    checkA2dpSuspend();
591    checkOutputForAllStrategies();
592    updateDevicesAndOutputs();
593
594    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
595
596    int delayMs = 0;
597    if (isStateInCall(state)) {
598        nsecs_t sysTime = systemTime();
599        for (size_t i = 0; i < mOutputs.size(); i++) {
600            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
601            // mute media and sonification strategies and delay device switch by the largest
602            // latency of any output where either strategy is active.
603            // This avoid sending the ring tone or music tail into the earpiece or headset.
604            if ((desc->isStrategyActive(STRATEGY_MEDIA,
605                                     SONIFICATION_HEADSET_MUSIC_DELAY,
606                                     sysTime) ||
607                    desc->isStrategyActive(STRATEGY_SONIFICATION,
608                                         SONIFICATION_HEADSET_MUSIC_DELAY,
609                                         sysTime)) &&
610                    (delayMs < (int)desc->mLatency*2)) {
611                delayMs = desc->mLatency*2;
612            }
613            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
614            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
615                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
616            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
617            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
618                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
619        }
620    }
621
622    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
623    // the device returned is not necessarily reachable via this output
624    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
625    // force routing command to audio hardware when ending call
626    // even if no device change is needed
627    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
628        rxDevice = hwOutputDesc->device();
629    }
630
631    if (state == AUDIO_MODE_IN_CALL) {
632        updateCallRouting(rxDevice, delayMs);
633    } else if (oldState == AUDIO_MODE_IN_CALL) {
634        if (mCallRxPatch != 0) {
635            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
636            mCallRxPatch.clear();
637        }
638        if (mCallTxPatch != 0) {
639            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
640            mCallTxPatch.clear();
641        }
642        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
643    } else {
644        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
645    }
646    // if entering in call state, handle special case of active streams
647    // pertaining to sonification strategy see handleIncallSonification()
648    if (isStateInCall(state)) {
649        ALOGV("setPhoneState() in call state management: new state is %d", state);
650        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
651            handleIncallSonification((audio_stream_type_t)stream, true, true);
652        }
653    }
654
655    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
656    if (state == AUDIO_MODE_RINGTONE &&
657        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
658        mLimitRingtoneVolume = true;
659    } else {
660        mLimitRingtoneVolume = false;
661    }
662}
663
664void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
665                                         audio_policy_forced_cfg_t config)
666{
667    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
668
669    bool forceVolumeReeval = false;
670    switch(usage) {
671    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
672        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
673            config != AUDIO_POLICY_FORCE_NONE) {
674            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
675            return;
676        }
677        forceVolumeReeval = true;
678        mForceUse[usage] = config;
679        break;
680    case AUDIO_POLICY_FORCE_FOR_MEDIA:
681        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
682            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
683            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
684            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
685            config != AUDIO_POLICY_FORCE_NO_BT_A2DP) {
686            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
687            return;
688        }
689        mForceUse[usage] = config;
690        break;
691    case AUDIO_POLICY_FORCE_FOR_RECORD:
692        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
693            config != AUDIO_POLICY_FORCE_NONE) {
694            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
695            return;
696        }
697        mForceUse[usage] = config;
698        break;
699    case AUDIO_POLICY_FORCE_FOR_DOCK:
700        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
701            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
702            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
703            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
704            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
705            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
706        }
707        forceVolumeReeval = true;
708        mForceUse[usage] = config;
709        break;
710    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
711        if (config != AUDIO_POLICY_FORCE_NONE &&
712            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
713            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
714        }
715        forceVolumeReeval = true;
716        mForceUse[usage] = config;
717        break;
718    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
719        if (config != AUDIO_POLICY_FORCE_NONE &&
720            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
721            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
722        }
723        mForceUse[usage] = config;
724        break;
725    default:
726        ALOGW("setForceUse() invalid usage %d", usage);
727        break;
728    }
729
730    // check for device and output changes triggered by new force usage
731    checkA2dpSuspend();
732    checkOutputForAllStrategies();
733    updateDevicesAndOutputs();
734    if (mPhoneState == AUDIO_MODE_IN_CALL) {
735        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
736        updateCallRouting(newDevice);
737    }
738    for (size_t i = 0; i < mOutputs.size(); i++) {
739        audio_io_handle_t output = mOutputs.keyAt(i);
740        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
741        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
742            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
743        }
744        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
745            applyStreamVolumes(output, newDevice, 0, true);
746        }
747    }
748
749    audio_io_handle_t activeInput = getActiveInput();
750    if (activeInput != 0) {
751        setInputDevice(activeInput, getNewInputDevice(activeInput));
752    }
753
754}
755
756audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
757{
758    return mForceUse[usage];
759}
760
761void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
762{
763    ALOGV("setSystemProperty() property %s, value %s", property, value);
764}
765
766// Find a direct output profile compatible with the parameters passed, even if the input flags do
767// not explicitly request a direct output
768sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
769                                                               audio_devices_t device,
770                                                               uint32_t samplingRate,
771                                                               audio_format_t format,
772                                                               audio_channel_mask_t channelMask,
773                                                               audio_output_flags_t flags)
774{
775    for (size_t i = 0; i < mHwModules.size(); i++) {
776        if (mHwModules[i]->mHandle == 0) {
777            continue;
778        }
779        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
780            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
781            bool found = profile->isCompatibleProfile(device, samplingRate,
782                    NULL /*updatedSamplingRate*/, format, channelMask,
783                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
784                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
785            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
786                return profile;
787            }
788        }
789    }
790    return 0;
791}
792
793audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
794                                    uint32_t samplingRate,
795                                    audio_format_t format,
796                                    audio_channel_mask_t channelMask,
797                                    audio_output_flags_t flags,
798                                    const audio_offload_info_t *offloadInfo)
799{
800
801    routing_strategy strategy = getStrategy(stream);
802    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
803    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
804          device, stream, samplingRate, format, channelMask, flags);
805
806    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
807            offloadInfo);
808}
809
810audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
811                                    uint32_t samplingRate,
812                                    audio_format_t format,
813                                    audio_channel_mask_t channelMask,
814                                    audio_output_flags_t flags,
815                                    const audio_offload_info_t *offloadInfo)
816{
817    if (attr == NULL) {
818        ALOGE("getOutputForAttr() called with NULL audio attributes");
819        return 0;
820    }
821    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
822            attr->usage, attr->content_type, attr->tags, attr->flags);
823
824    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
825    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
826    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
827
828    if ((attr->flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
829        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
830    }
831
832    ALOGV("getOutputForAttr() device %d, samplingRate %d, format %x, channelMask %x, flags %x",
833          device, samplingRate, format, channelMask, flags);
834
835    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
836    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
837                offloadInfo);
838}
839
840audio_io_handle_t AudioPolicyManager::getOutputForDevice(
841        audio_devices_t device,
842        audio_stream_type_t stream,
843        uint32_t samplingRate,
844        audio_format_t format,
845        audio_channel_mask_t channelMask,
846        audio_output_flags_t flags,
847        const audio_offload_info_t *offloadInfo)
848{
849    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
850    uint32_t latency = 0;
851    status_t status;
852
853#ifdef AUDIO_POLICY_TEST
854    if (mCurOutput != 0) {
855        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
856                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
857
858        if (mTestOutputs[mCurOutput] == 0) {
859            ALOGV("getOutput() opening test output");
860            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
861            outputDesc->mDevice = mTestDevice;
862            outputDesc->mLatency = mTestLatencyMs;
863            outputDesc->mFlags =
864                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
865            outputDesc->mRefCount[stream] = 0;
866            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
867            config.sample_rate = mTestSamplingRate;
868            config.channel_mask = mTestChannels;
869            config.format = mTestFormat;
870            if (offloadInfo != NULL) {
871                config.offload_info = *offloadInfo;
872            }
873            status = mpClientInterface->openOutput(0,
874                                                  &mTestOutputs[mCurOutput],
875                                                  &config,
876                                                  &outputDesc->mDevice,
877                                                  String8(""),
878                                                  &outputDesc->mLatency,
879                                                  outputDesc->mFlags);
880            if (status == NO_ERROR) {
881                outputDesc->mSamplingRate = config.sample_rate;
882                outputDesc->mFormat = config.format;
883                outputDesc->mChannelMask = config.channel_mask;
884                AudioParameter outputCmd = AudioParameter();
885                outputCmd.addInt(String8("set_id"),mCurOutput);
886                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
887                addOutput(mTestOutputs[mCurOutput], outputDesc);
888            }
889        }
890        return mTestOutputs[mCurOutput];
891    }
892#endif //AUDIO_POLICY_TEST
893
894    // open a direct output if required by specified parameters
895    //force direct flag if offload flag is set: offloading implies a direct output stream
896    // and all common behaviors are driven by checking only the direct flag
897    // this should normally be set appropriately in the policy configuration file
898    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
899        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
900    }
901    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
902        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
903    }
904
905    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
906    // creating an offloaded track and tearing it down immediately after start when audioflinger
907    // detects there is an active non offloadable effect.
908    // FIXME: We should check the audio session here but we do not have it in this context.
909    // This may prevent offloading in rare situations where effects are left active by apps
910    // in the background.
911    sp<IOProfile> profile;
912    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
913            !isNonOffloadableEffectEnabled()) {
914        profile = getProfileForDirectOutput(device,
915                                           samplingRate,
916                                           format,
917                                           channelMask,
918                                           (audio_output_flags_t)flags);
919    }
920
921    if (profile != 0) {
922        sp<AudioOutputDescriptor> outputDesc = NULL;
923
924        for (size_t i = 0; i < mOutputs.size(); i++) {
925            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
926            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
927                outputDesc = desc;
928                // reuse direct output if currently open and configured with same parameters
929                if ((samplingRate == outputDesc->mSamplingRate) &&
930                        (format == outputDesc->mFormat) &&
931                        (channelMask == outputDesc->mChannelMask)) {
932                    outputDesc->mDirectOpenCount++;
933                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
934                    return mOutputs.keyAt(i);
935                }
936            }
937        }
938        // close direct output if currently open and configured with different parameters
939        if (outputDesc != NULL) {
940            closeOutput(outputDesc->mIoHandle);
941        }
942        outputDesc = new AudioOutputDescriptor(profile);
943        outputDesc->mDevice = device;
944        outputDesc->mLatency = 0;
945        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
946        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
947        config.sample_rate = samplingRate;
948        config.channel_mask = channelMask;
949        config.format = format;
950        if (offloadInfo != NULL) {
951            config.offload_info = *offloadInfo;
952        }
953        status = mpClientInterface->openOutput(profile->mModule->mHandle,
954                                               &output,
955                                               &config,
956                                               &outputDesc->mDevice,
957                                               String8(""),
958                                               &outputDesc->mLatency,
959                                               outputDesc->mFlags);
960
961        // only accept an output with the requested parameters
962        if (status != NO_ERROR ||
963            (samplingRate != 0 && samplingRate != config.sample_rate) ||
964            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
965            (channelMask != 0 && channelMask != config.channel_mask)) {
966            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
967                    "format %d %d, channelMask %04x %04x", output, samplingRate,
968                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
969                    outputDesc->mChannelMask);
970            if (output != AUDIO_IO_HANDLE_NONE) {
971                mpClientInterface->closeOutput(output);
972            }
973            return AUDIO_IO_HANDLE_NONE;
974        }
975        outputDesc->mSamplingRate = config.sample_rate;
976        outputDesc->mChannelMask = config.channel_mask;
977        outputDesc->mFormat = config.format;
978        outputDesc->mRefCount[stream] = 0;
979        outputDesc->mStopTime[stream] = 0;
980        outputDesc->mDirectOpenCount = 1;
981
982        audio_io_handle_t srcOutput = getOutputForEffect();
983        addOutput(output, outputDesc);
984        audio_io_handle_t dstOutput = getOutputForEffect();
985        if (dstOutput == output) {
986            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
987        }
988        mPreviousOutputs = mOutputs;
989        ALOGV("getOutput() returns new direct output %d", output);
990        mpClientInterface->onAudioPortListUpdate();
991        return output;
992    }
993
994    // ignoring channel mask due to downmix capability in mixer
995
996    // open a non direct output
997
998    // for non direct outputs, only PCM is supported
999    if (audio_is_linear_pcm(format)) {
1000        // get which output is suitable for the specified stream. The actual
1001        // routing change will happen when startOutput() will be called
1002        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1003
1004        output = selectOutput(outputs, flags);
1005    }
1006    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1007            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1008
1009    ALOGV("getOutput() returns output %d", output);
1010
1011    return output;
1012}
1013
1014audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1015                                                       audio_output_flags_t flags)
1016{
1017    // select one output among several that provide a path to a particular device or set of
1018    // devices (the list was previously build by getOutputsForDevice()).
1019    // The priority is as follows:
1020    // 1: the output with the highest number of requested policy flags
1021    // 2: the primary output
1022    // 3: the first output in the list
1023
1024    if (outputs.size() == 0) {
1025        return 0;
1026    }
1027    if (outputs.size() == 1) {
1028        return outputs[0];
1029    }
1030
1031    int maxCommonFlags = 0;
1032    audio_io_handle_t outputFlags = 0;
1033    audio_io_handle_t outputPrimary = 0;
1034
1035    for (size_t i = 0; i < outputs.size(); i++) {
1036        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1037        if (!outputDesc->isDuplicated()) {
1038            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1039            if (commonFlags > maxCommonFlags) {
1040                outputFlags = outputs[i];
1041                maxCommonFlags = commonFlags;
1042                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1043            }
1044            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1045                outputPrimary = outputs[i];
1046            }
1047        }
1048    }
1049
1050    if (outputFlags != 0) {
1051        return outputFlags;
1052    }
1053    if (outputPrimary != 0) {
1054        return outputPrimary;
1055    }
1056
1057    return outputs[0];
1058}
1059
1060status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1061                                             audio_stream_type_t stream,
1062                                             int session)
1063{
1064    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1065    ssize_t index = mOutputs.indexOfKey(output);
1066    if (index < 0) {
1067        ALOGW("startOutput() unknown output %d", output);
1068        return BAD_VALUE;
1069    }
1070
1071    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1072
1073    // increment usage count for this stream on the requested output:
1074    // NOTE that the usage count is the same for duplicated output and hardware output which is
1075    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1076    outputDesc->changeRefCount(stream, 1);
1077
1078    if (outputDesc->mRefCount[stream] == 1) {
1079        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1080        routing_strategy strategy = getStrategy(stream);
1081        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1082                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
1083        uint32_t waitMs = 0;
1084        bool force = false;
1085        for (size_t i = 0; i < mOutputs.size(); i++) {
1086            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1087            if (desc != outputDesc) {
1088                // force a device change if any other output is managed by the same hw
1089                // module and has a current device selection that differs from selected device.
1090                // In this case, the audio HAL must receive the new device selection so that it can
1091                // change the device currently selected by the other active output.
1092                if (outputDesc->sharesHwModuleWith(desc) &&
1093                    desc->device() != newDevice) {
1094                    force = true;
1095                }
1096                // wait for audio on other active outputs to be presented when starting
1097                // a notification so that audio focus effect can propagate.
1098                uint32_t latency = desc->latency();
1099                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1100                    waitMs = latency;
1101                }
1102            }
1103        }
1104        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1105
1106        // handle special case for sonification while in call
1107        if (isInCall()) {
1108            handleIncallSonification(stream, true, false);
1109        }
1110
1111        // apply volume rules for current stream and device if necessary
1112        checkAndSetVolume(stream,
1113                          mStreams[stream].getVolumeIndex(newDevice),
1114                          output,
1115                          newDevice);
1116
1117        // update the outputs if starting an output with a stream that can affect notification
1118        // routing
1119        handleNotificationRoutingForStream(stream);
1120        if (waitMs > muteWaitMs) {
1121            usleep((waitMs - muteWaitMs) * 2 * 1000);
1122        }
1123    }
1124    return NO_ERROR;
1125}
1126
1127
1128status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1129                                            audio_stream_type_t stream,
1130                                            int session)
1131{
1132    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1133    ssize_t index = mOutputs.indexOfKey(output);
1134    if (index < 0) {
1135        ALOGW("stopOutput() unknown output %d", output);
1136        return BAD_VALUE;
1137    }
1138
1139    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1140
1141    // handle special case for sonification while in call
1142    if (isInCall()) {
1143        handleIncallSonification(stream, false, false);
1144    }
1145
1146    if (outputDesc->mRefCount[stream] > 0) {
1147        // decrement usage count of this stream on the output
1148        outputDesc->changeRefCount(stream, -1);
1149        // store time at which the stream was stopped - see isStreamActive()
1150        if (outputDesc->mRefCount[stream] == 0) {
1151            outputDesc->mStopTime[stream] = systemTime();
1152            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1153            // delay the device switch by twice the latency because stopOutput() is executed when
1154            // the track stop() command is received and at that time the audio track buffer can
1155            // still contain data that needs to be drained. The latency only covers the audio HAL
1156            // and kernel buffers. Also the latency does not always include additional delay in the
1157            // audio path (audio DSP, CODEC ...)
1158            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1159
1160            // force restoring the device selection on other active outputs if it differs from the
1161            // one being selected for this output
1162            for (size_t i = 0; i < mOutputs.size(); i++) {
1163                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1164                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1165                if (curOutput != output &&
1166                        desc->isActive() &&
1167                        outputDesc->sharesHwModuleWith(desc) &&
1168                        (newDevice != desc->device())) {
1169                    setOutputDevice(curOutput,
1170                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1171                                    true,
1172                                    outputDesc->mLatency*2);
1173                }
1174            }
1175            // update the outputs if stopping one with a stream that can affect notification routing
1176            handleNotificationRoutingForStream(stream);
1177        }
1178        return NO_ERROR;
1179    } else {
1180        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1181        return INVALID_OPERATION;
1182    }
1183}
1184
1185void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1186{
1187    ALOGV("releaseOutput() %d", output);
1188    ssize_t index = mOutputs.indexOfKey(output);
1189    if (index < 0) {
1190        ALOGW("releaseOutput() releasing unknown output %d", output);
1191        return;
1192    }
1193
1194#ifdef AUDIO_POLICY_TEST
1195    int testIndex = testOutputIndex(output);
1196    if (testIndex != 0) {
1197        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1198        if (outputDesc->isActive()) {
1199            mpClientInterface->closeOutput(output);
1200            mOutputs.removeItem(output);
1201            mTestOutputs[testIndex] = 0;
1202        }
1203        return;
1204    }
1205#endif //AUDIO_POLICY_TEST
1206
1207    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1208    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1209        if (desc->mDirectOpenCount <= 0) {
1210            ALOGW("releaseOutput() invalid open count %d for output %d",
1211                                                              desc->mDirectOpenCount, output);
1212            return;
1213        }
1214        if (--desc->mDirectOpenCount == 0) {
1215            closeOutput(output);
1216            // If effects where present on the output, audioflinger moved them to the primary
1217            // output by default: move them back to the appropriate output.
1218            audio_io_handle_t dstOutput = getOutputForEffect();
1219            if (dstOutput != mPrimaryOutput) {
1220                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1221            }
1222            mpClientInterface->onAudioPortListUpdate();
1223        }
1224    }
1225}
1226
1227
1228audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1229                                    uint32_t samplingRate,
1230                                    audio_format_t format,
1231                                    audio_channel_mask_t channelMask,
1232                                    audio_session_t session,
1233                                    audio_input_flags_t flags)
1234{
1235    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, session %d, "
1236          "flags %#x",
1237          inputSource, samplingRate, format, channelMask, session, flags);
1238
1239    audio_devices_t device = getDeviceForInputSource(inputSource);
1240
1241    if (device == AUDIO_DEVICE_NONE) {
1242        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1243        return AUDIO_IO_HANDLE_NONE;
1244    }
1245
1246    // adapt channel selection to input source
1247    switch (inputSource) {
1248    case AUDIO_SOURCE_VOICE_UPLINK:
1249        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1250        break;
1251    case AUDIO_SOURCE_VOICE_DOWNLINK:
1252        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1253        break;
1254    case AUDIO_SOURCE_VOICE_CALL:
1255        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1256        break;
1257    default:
1258        break;
1259    }
1260
1261    sp<IOProfile> profile = getInputProfile(device,
1262                                         samplingRate,
1263                                         format,
1264                                         channelMask,
1265                                         flags);
1266    if (profile == 0) {
1267        ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1268                "channelMask 0x%X, flags %#x",
1269                device, samplingRate, format, channelMask, flags);
1270        return AUDIO_IO_HANDLE_NONE;
1271    }
1272
1273    if (profile->mModule->mHandle == 0) {
1274        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1275        return AUDIO_IO_HANDLE_NONE;
1276    }
1277
1278    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1279    config.sample_rate = samplingRate;
1280    config.channel_mask = channelMask;
1281    config.format = format;
1282    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1283
1284    bool isSoundTrigger = false;
1285    if (inputSource == AUDIO_SOURCE_HOTWORD) {
1286        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1287        if (index >= 0) {
1288            input = mSoundTriggerSessions.valueFor(session);
1289            isSoundTrigger = true;
1290            ALOGV("SoundTrigger capture on session %d input %d", session, input);
1291        }
1292    }
1293
1294    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1295                                                   &input,
1296                                                   &config,
1297                                                   &device,
1298                                                   String8(""),
1299                                                   inputSource,
1300                                                   flags);
1301
1302    // only accept input with the exact requested set of parameters
1303    if (status != NO_ERROR ||
1304        (samplingRate != config.sample_rate) ||
1305        (format != config.format) ||
1306        (channelMask != config.channel_mask)) {
1307        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1308                samplingRate, format, channelMask);
1309        if (input != AUDIO_IO_HANDLE_NONE) {
1310            mpClientInterface->closeInput(input);
1311        }
1312        return AUDIO_IO_HANDLE_NONE;
1313    }
1314
1315    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1316    inputDesc->mInputSource = inputSource;
1317    inputDesc->mRefCount = 0;
1318    inputDesc->mOpenRefCount = 1;
1319    inputDesc->mSamplingRate = samplingRate;
1320    inputDesc->mFormat = format;
1321    inputDesc->mChannelMask = channelMask;
1322    inputDesc->mDevice = device;
1323    inputDesc->mSessions.add(session);
1324    inputDesc->mIsSoundTrigger = isSoundTrigger;
1325
1326    addInput(input, inputDesc);
1327    mpClientInterface->onAudioPortListUpdate();
1328    return input;
1329}
1330
1331status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1332                                        audio_session_t session)
1333{
1334    ALOGV("startInput() input %d", input);
1335    ssize_t index = mInputs.indexOfKey(input);
1336    if (index < 0) {
1337        ALOGW("startInput() unknown input %d", input);
1338        return BAD_VALUE;
1339    }
1340    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1341
1342    index = inputDesc->mSessions.indexOf(session);
1343    if (index < 0) {
1344        ALOGW("startInput() unknown session %d on input %d", session, input);
1345        return BAD_VALUE;
1346    }
1347
1348    // virtual input devices are compatible with other input devices
1349    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1350
1351        // for a non-virtual input device, check if there is another (non-virtual) active input
1352        audio_io_handle_t activeInput = getActiveInput();
1353        if (activeInput != 0 && activeInput != input) {
1354
1355            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1356            // otherwise the active input continues and the new input cannot be started.
1357            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1358            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1359                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1360                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1361                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1362            } else {
1363                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1364                return INVALID_OPERATION;
1365            }
1366        }
1367    }
1368
1369    if (inputDesc->mRefCount == 0) {
1370        if (activeInputsCount() == 0) {
1371            SoundTrigger::setCaptureState(true);
1372        }
1373        setInputDevice(input, getNewInputDevice(input), true /* force */);
1374
1375        // Automatically enable the remote submix output when input is started.
1376        // For remote submix (a virtual device), we open only one input per capture request.
1377        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1378            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1379                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1380        }
1381    }
1382
1383    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1384
1385    inputDesc->mRefCount++;
1386    return NO_ERROR;
1387}
1388
1389status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1390                                       audio_session_t session)
1391{
1392    ALOGV("stopInput() input %d", input);
1393    ssize_t index = mInputs.indexOfKey(input);
1394    if (index < 0) {
1395        ALOGW("stopInput() unknown input %d", input);
1396        return BAD_VALUE;
1397    }
1398    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1399
1400    index = inputDesc->mSessions.indexOf(session);
1401    if (index < 0) {
1402        ALOGW("stopInput() unknown session %d on input %d", session, input);
1403        return BAD_VALUE;
1404    }
1405
1406    if (inputDesc->mRefCount == 0) {
1407        ALOGW("stopInput() input %d already stopped", input);
1408        return INVALID_OPERATION;
1409    }
1410
1411    inputDesc->mRefCount--;
1412    if (inputDesc->mRefCount == 0) {
1413
1414        // automatically disable the remote submix output when input is stopped
1415        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1416            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1417                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1418        }
1419
1420        resetInputDevice(input);
1421
1422        if (activeInputsCount() == 0) {
1423            SoundTrigger::setCaptureState(false);
1424        }
1425    }
1426    return NO_ERROR;
1427}
1428
1429void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1430                                      audio_session_t session)
1431{
1432    ALOGV("releaseInput() %d", input);
1433    ssize_t index = mInputs.indexOfKey(input);
1434    if (index < 0) {
1435        ALOGW("releaseInput() releasing unknown input %d", input);
1436        return;
1437    }
1438    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1439    ALOG_ASSERT(inputDesc != 0);
1440
1441    index = inputDesc->mSessions.indexOf(session);
1442    if (index < 0) {
1443        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1444        return;
1445    }
1446    inputDesc->mSessions.remove(session);
1447    if (inputDesc->mOpenRefCount == 0) {
1448        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1449        return;
1450    }
1451    inputDesc->mOpenRefCount--;
1452    if (inputDesc->mOpenRefCount > 0) {
1453        ALOGV("releaseInput() exit > 0");
1454        return;
1455    }
1456
1457    mpClientInterface->closeInput(input);
1458    mInputs.removeItem(input);
1459    nextAudioPortGeneration();
1460    mpClientInterface->onAudioPortListUpdate();
1461    ALOGV("releaseInput() exit");
1462}
1463
1464void AudioPolicyManager::closeAllInputs() {
1465    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1466        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1467    }
1468    mInputs.clear();
1469    nextAudioPortGeneration();
1470}
1471
1472void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1473                                            int indexMin,
1474                                            int indexMax)
1475{
1476    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1477    if (indexMin < 0 || indexMin >= indexMax) {
1478        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1479        return;
1480    }
1481    mStreams[stream].mIndexMin = indexMin;
1482    mStreams[stream].mIndexMax = indexMax;
1483}
1484
1485status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1486                                                      int index,
1487                                                      audio_devices_t device)
1488{
1489
1490    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1491        return BAD_VALUE;
1492    }
1493    if (!audio_is_output_device(device)) {
1494        return BAD_VALUE;
1495    }
1496
1497    // Force max volume if stream cannot be muted
1498    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1499
1500    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1501          stream, device, index);
1502
1503    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1504    // clear all device specific values
1505    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1506        mStreams[stream].mIndexCur.clear();
1507    }
1508    mStreams[stream].mIndexCur.add(device, index);
1509
1510    // compute and apply stream volume on all outputs according to connected device
1511    status_t status = NO_ERROR;
1512    for (size_t i = 0; i < mOutputs.size(); i++) {
1513        audio_devices_t curDevice =
1514                getDeviceForVolume(mOutputs.valueAt(i)->device());
1515        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1516            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1517            if (volStatus != NO_ERROR) {
1518                status = volStatus;
1519            }
1520        }
1521    }
1522    return status;
1523}
1524
1525status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1526                                                      int *index,
1527                                                      audio_devices_t device)
1528{
1529    if (index == NULL) {
1530        return BAD_VALUE;
1531    }
1532    if (!audio_is_output_device(device)) {
1533        return BAD_VALUE;
1534    }
1535    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1536    // the strategy the stream belongs to.
1537    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1538        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1539    }
1540    device = getDeviceForVolume(device);
1541
1542    *index =  mStreams[stream].getVolumeIndex(device);
1543    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1544    return NO_ERROR;
1545}
1546
1547audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1548                                            const SortedVector<audio_io_handle_t>& outputs)
1549{
1550    // select one output among several suitable for global effects.
1551    // The priority is as follows:
1552    // 1: An offloaded output. If the effect ends up not being offloadable,
1553    //    AudioFlinger will invalidate the track and the offloaded output
1554    //    will be closed causing the effect to be moved to a PCM output.
1555    // 2: A deep buffer output
1556    // 3: the first output in the list
1557
1558    if (outputs.size() == 0) {
1559        return 0;
1560    }
1561
1562    audio_io_handle_t outputOffloaded = 0;
1563    audio_io_handle_t outputDeepBuffer = 0;
1564
1565    for (size_t i = 0; i < outputs.size(); i++) {
1566        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1567        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1568        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1569            outputOffloaded = outputs[i];
1570        }
1571        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1572            outputDeepBuffer = outputs[i];
1573        }
1574    }
1575
1576    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1577          outputOffloaded, outputDeepBuffer);
1578    if (outputOffloaded != 0) {
1579        return outputOffloaded;
1580    }
1581    if (outputDeepBuffer != 0) {
1582        return outputDeepBuffer;
1583    }
1584
1585    return outputs[0];
1586}
1587
1588audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1589{
1590    // apply simple rule where global effects are attached to the same output as MUSIC streams
1591
1592    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1593    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1594    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1595
1596    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1597    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1598          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1599
1600    return output;
1601}
1602
1603status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1604                                audio_io_handle_t io,
1605                                uint32_t strategy,
1606                                int session,
1607                                int id)
1608{
1609    ssize_t index = mOutputs.indexOfKey(io);
1610    if (index < 0) {
1611        index = mInputs.indexOfKey(io);
1612        if (index < 0) {
1613            ALOGW("registerEffect() unknown io %d", io);
1614            return INVALID_OPERATION;
1615        }
1616    }
1617
1618    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1619        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1620                desc->name, desc->memoryUsage);
1621        return INVALID_OPERATION;
1622    }
1623    mTotalEffectsMemory += desc->memoryUsage;
1624    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1625            desc->name, io, strategy, session, id);
1626    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1627
1628    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1629    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1630    effectDesc->mIo = io;
1631    effectDesc->mStrategy = (routing_strategy)strategy;
1632    effectDesc->mSession = session;
1633    effectDesc->mEnabled = false;
1634
1635    mEffects.add(id, effectDesc);
1636
1637    return NO_ERROR;
1638}
1639
1640status_t AudioPolicyManager::unregisterEffect(int id)
1641{
1642    ssize_t index = mEffects.indexOfKey(id);
1643    if (index < 0) {
1644        ALOGW("unregisterEffect() unknown effect ID %d", id);
1645        return INVALID_OPERATION;
1646    }
1647
1648    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1649
1650    setEffectEnabled(effectDesc, false);
1651
1652    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1653        ALOGW("unregisterEffect() memory %d too big for total %d",
1654                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1655        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1656    }
1657    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1658    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1659            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1660
1661    mEffects.removeItem(id);
1662
1663    return NO_ERROR;
1664}
1665
1666status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1667{
1668    ssize_t index = mEffects.indexOfKey(id);
1669    if (index < 0) {
1670        ALOGW("unregisterEffect() unknown effect ID %d", id);
1671        return INVALID_OPERATION;
1672    }
1673
1674    return setEffectEnabled(mEffects.valueAt(index), enabled);
1675}
1676
1677status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1678{
1679    if (enabled == effectDesc->mEnabled) {
1680        ALOGV("setEffectEnabled(%s) effect already %s",
1681             enabled?"true":"false", enabled?"enabled":"disabled");
1682        return INVALID_OPERATION;
1683    }
1684
1685    if (enabled) {
1686        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1687            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1688                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1689            return INVALID_OPERATION;
1690        }
1691        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1692        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1693    } else {
1694        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1695            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1696                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1697            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1698        }
1699        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1700        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1701    }
1702    effectDesc->mEnabled = enabled;
1703    return NO_ERROR;
1704}
1705
1706bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1707{
1708    for (size_t i = 0; i < mEffects.size(); i++) {
1709        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1710        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1711                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1712            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1713                  effectDesc->mDesc.name, effectDesc->mSession);
1714            return true;
1715        }
1716    }
1717    return false;
1718}
1719
1720bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1721{
1722    nsecs_t sysTime = systemTime();
1723    for (size_t i = 0; i < mOutputs.size(); i++) {
1724        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1725        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1726            return true;
1727        }
1728    }
1729    return false;
1730}
1731
1732bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1733                                                    uint32_t inPastMs) const
1734{
1735    nsecs_t sysTime = systemTime();
1736    for (size_t i = 0; i < mOutputs.size(); i++) {
1737        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1738        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1739                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1740            return true;
1741        }
1742    }
1743    return false;
1744}
1745
1746bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1747{
1748    for (size_t i = 0; i < mInputs.size(); i++) {
1749        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1750        if ((inputDescriptor->mInputSource == (int)source ||
1751                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1752                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1753             && (inputDescriptor->mRefCount > 0)) {
1754            return true;
1755        }
1756    }
1757    return false;
1758}
1759
1760
1761status_t AudioPolicyManager::dump(int fd)
1762{
1763    const size_t SIZE = 256;
1764    char buffer[SIZE];
1765    String8 result;
1766
1767    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1768    result.append(buffer);
1769
1770    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1771    result.append(buffer);
1772    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1773    result.append(buffer);
1774    snprintf(buffer, SIZE, " Force use for communications %d\n",
1775             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1776    result.append(buffer);
1777    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1778    result.append(buffer);
1779    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1780    result.append(buffer);
1781    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1782    result.append(buffer);
1783    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1784    result.append(buffer);
1785    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1786            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1787    result.append(buffer);
1788
1789    snprintf(buffer, SIZE, " Available output devices:\n");
1790    result.append(buffer);
1791    write(fd, result.string(), result.size());
1792    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1793        mAvailableOutputDevices[i]->dump(fd, 2, i);
1794    }
1795    snprintf(buffer, SIZE, "\n Available input devices:\n");
1796    write(fd, buffer, strlen(buffer));
1797    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1798        mAvailableInputDevices[i]->dump(fd, 2, i);
1799    }
1800
1801    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1802    write(fd, buffer, strlen(buffer));
1803    for (size_t i = 0; i < mHwModules.size(); i++) {
1804        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1805        write(fd, buffer, strlen(buffer));
1806        mHwModules[i]->dump(fd);
1807    }
1808
1809    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1810    write(fd, buffer, strlen(buffer));
1811    for (size_t i = 0; i < mOutputs.size(); i++) {
1812        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1813        write(fd, buffer, strlen(buffer));
1814        mOutputs.valueAt(i)->dump(fd);
1815    }
1816
1817    snprintf(buffer, SIZE, "\nInputs dump:\n");
1818    write(fd, buffer, strlen(buffer));
1819    for (size_t i = 0; i < mInputs.size(); i++) {
1820        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1821        write(fd, buffer, strlen(buffer));
1822        mInputs.valueAt(i)->dump(fd);
1823    }
1824
1825    snprintf(buffer, SIZE, "\nStreams dump:\n");
1826    write(fd, buffer, strlen(buffer));
1827    snprintf(buffer, SIZE,
1828             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1829    write(fd, buffer, strlen(buffer));
1830    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1831        snprintf(buffer, SIZE, " %02zu      ", i);
1832        write(fd, buffer, strlen(buffer));
1833        mStreams[i].dump(fd);
1834    }
1835
1836    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1837            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1838    write(fd, buffer, strlen(buffer));
1839
1840    snprintf(buffer, SIZE, "Registered effects:\n");
1841    write(fd, buffer, strlen(buffer));
1842    for (size_t i = 0; i < mEffects.size(); i++) {
1843        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1844        write(fd, buffer, strlen(buffer));
1845        mEffects.valueAt(i)->dump(fd);
1846    }
1847
1848
1849    return NO_ERROR;
1850}
1851
1852// This function checks for the parameters which can be offloaded.
1853// This can be enhanced depending on the capability of the DSP and policy
1854// of the system.
1855bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1856{
1857    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1858     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1859     offloadInfo.sample_rate, offloadInfo.channel_mask,
1860     offloadInfo.format,
1861     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1862     offloadInfo.has_video);
1863
1864    // Check if offload has been disabled
1865    char propValue[PROPERTY_VALUE_MAX];
1866    if (property_get("audio.offload.disable", propValue, "0")) {
1867        if (atoi(propValue) != 0) {
1868            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1869            return false;
1870        }
1871    }
1872
1873    // Check if stream type is music, then only allow offload as of now.
1874    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1875    {
1876        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1877        return false;
1878    }
1879
1880    //TODO: enable audio offloading with video when ready
1881    if (offloadInfo.has_video)
1882    {
1883        ALOGV("isOffloadSupported: has_video == true, returning false");
1884        return false;
1885    }
1886
1887    //If duration is less than minimum value defined in property, return false
1888    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1889        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1890            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1891            return false;
1892        }
1893    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1894        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1895        return false;
1896    }
1897
1898    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1899    // creating an offloaded track and tearing it down immediately after start when audioflinger
1900    // detects there is an active non offloadable effect.
1901    // FIXME: We should check the audio session here but we do not have it in this context.
1902    // This may prevent offloading in rare situations where effects are left active by apps
1903    // in the background.
1904    if (isNonOffloadableEffectEnabled()) {
1905        return false;
1906    }
1907
1908    // See if there is a profile to support this.
1909    // AUDIO_DEVICE_NONE
1910    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1911                                            offloadInfo.sample_rate,
1912                                            offloadInfo.format,
1913                                            offloadInfo.channel_mask,
1914                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1915    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1916    return (profile != 0);
1917}
1918
1919status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1920                                            audio_port_type_t type,
1921                                            unsigned int *num_ports,
1922                                            struct audio_port *ports,
1923                                            unsigned int *generation)
1924{
1925    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1926            generation == NULL) {
1927        return BAD_VALUE;
1928    }
1929    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1930    if (ports == NULL) {
1931        *num_ports = 0;
1932    }
1933
1934    size_t portsWritten = 0;
1935    size_t portsMax = *num_ports;
1936    *num_ports = 0;
1937    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1938        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1939            for (size_t i = 0;
1940                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1941                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1942            }
1943            *num_ports += mAvailableOutputDevices.size();
1944        }
1945        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1946            for (size_t i = 0;
1947                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1948                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1949            }
1950            *num_ports += mAvailableInputDevices.size();
1951        }
1952    }
1953    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1954        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1955            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1956                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1957            }
1958            *num_ports += mInputs.size();
1959        }
1960        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1961            size_t numOutputs = 0;
1962            for (size_t i = 0; i < mOutputs.size(); i++) {
1963                if (!mOutputs[i]->isDuplicated()) {
1964                    numOutputs++;
1965                    if (portsWritten < portsMax) {
1966                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
1967                    }
1968                }
1969            }
1970            *num_ports += numOutputs;
1971        }
1972    }
1973    *generation = curAudioPortGeneration();
1974    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
1975    return NO_ERROR;
1976}
1977
1978status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
1979{
1980    return NO_ERROR;
1981}
1982
1983sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
1984                                                                    audio_port_handle_t id) const
1985{
1986    sp<AudioOutputDescriptor> outputDesc = NULL;
1987    for (size_t i = 0; i < mOutputs.size(); i++) {
1988        outputDesc = mOutputs.valueAt(i);
1989        if (outputDesc->mId == id) {
1990            break;
1991        }
1992    }
1993    return outputDesc;
1994}
1995
1996sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
1997                                                                    audio_port_handle_t id) const
1998{
1999    sp<AudioInputDescriptor> inputDesc = NULL;
2000    for (size_t i = 0; i < mInputs.size(); i++) {
2001        inputDesc = mInputs.valueAt(i);
2002        if (inputDesc->mId == id) {
2003            break;
2004        }
2005    }
2006    return inputDesc;
2007}
2008
2009sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2010                                                                    audio_devices_t device) const
2011{
2012    sp <HwModule> module;
2013
2014    for (size_t i = 0; i < mHwModules.size(); i++) {
2015        if (mHwModules[i]->mHandle == 0) {
2016            continue;
2017        }
2018        if (audio_is_output_device(device)) {
2019            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2020            {
2021                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2022                    return mHwModules[i];
2023                }
2024            }
2025        } else {
2026            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2027                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2028                        device & ~AUDIO_DEVICE_BIT_IN) {
2029                    return mHwModules[i];
2030                }
2031            }
2032        }
2033    }
2034    return module;
2035}
2036
2037sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2038{
2039    sp <HwModule> module;
2040
2041    for (size_t i = 0; i < mHwModules.size(); i++)
2042    {
2043        if (strcmp(mHwModules[i]->mName, name) == 0) {
2044            return mHwModules[i];
2045        }
2046    }
2047    return module;
2048}
2049
2050audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2051{
2052    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2053    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2054    return devices & mAvailableOutputDevices.types();
2055}
2056
2057audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2058{
2059    audio_module_handle_t primaryHandle =
2060                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2061    audio_devices_t devices = AUDIO_DEVICE_NONE;
2062    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2063        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2064            devices |= mAvailableInputDevices[i]->mDeviceType;
2065        }
2066    }
2067    return devices;
2068}
2069
2070status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2071                                               audio_patch_handle_t *handle,
2072                                               uid_t uid)
2073{
2074    ALOGV("createAudioPatch()");
2075
2076    if (handle == NULL || patch == NULL) {
2077        return BAD_VALUE;
2078    }
2079    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2080
2081    if (patch->num_sources > 1 || patch->num_sinks > 1) {
2082        return INVALID_OPERATION;
2083    }
2084    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE ||
2085            patch->sinks[0].role != AUDIO_PORT_ROLE_SINK) {
2086        return INVALID_OPERATION;
2087    }
2088
2089    sp<AudioPatch> patchDesc;
2090    ssize_t index = mAudioPatches.indexOfKey(*handle);
2091
2092    ALOGV("createAudioPatch sink id %d role %d type %d", patch->sinks[0].id, patch->sinks[0].role,
2093                                                         patch->sinks[0].type);
2094    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2095                                                           patch->sources[0].role,
2096                                                           patch->sources[0].type);
2097
2098    if (index >= 0) {
2099        patchDesc = mAudioPatches.valueAt(index);
2100        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2101                                                                  mUidCached, patchDesc->mUid, uid);
2102        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2103            return INVALID_OPERATION;
2104        }
2105    } else {
2106        *handle = 0;
2107    }
2108
2109    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2110        // TODO add support for mix to mix connection
2111        if (patch->sinks[0].type != AUDIO_PORT_TYPE_DEVICE) {
2112            ALOGV("createAudioPatch() source mix sink not device");
2113            return BAD_VALUE;
2114        }
2115        // output mix to output device connection
2116        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2117        if (outputDesc == NULL) {
2118            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2119            return BAD_VALUE;
2120        }
2121        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2122                                                outputDesc->mIoHandle);
2123        if (patchDesc != 0) {
2124            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2125                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2126                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2127                return BAD_VALUE;
2128            }
2129        }
2130        sp<DeviceDescriptor> devDesc =
2131                mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
2132        if (devDesc == 0) {
2133            ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[0].id);
2134            return BAD_VALUE;
2135        }
2136
2137        if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2138                                                       patch->sources[0].sample_rate,
2139                                                     NULL,  // updatedSamplingRate
2140                                                     patch->sources[0].format,
2141                                                     patch->sources[0].channel_mask,
2142                                                     AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2143            ALOGV("createAudioPatch() profile not supported");
2144            return INVALID_OPERATION;
2145        }
2146        // TODO: reconfigure output format and channels here
2147        ALOGV("createAudioPatch() setting device %08x on output %d",
2148                                              devDesc->mDeviceType, outputDesc->mIoHandle);
2149        setOutputDevice(outputDesc->mIoHandle,
2150                        devDesc->mDeviceType,
2151                       true,
2152                       0,
2153                       handle);
2154        index = mAudioPatches.indexOfKey(*handle);
2155        if (index >= 0) {
2156            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2157                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2158            }
2159            patchDesc = mAudioPatches.valueAt(index);
2160            patchDesc->mUid = uid;
2161            ALOGV("createAudioPatch() success");
2162        } else {
2163            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2164            return INVALID_OPERATION;
2165        }
2166    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2167        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2168            // input device to input mix connection
2169            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2170            if (inputDesc == NULL) {
2171                return BAD_VALUE;
2172            }
2173            if (patchDesc != 0) {
2174                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2175                    return BAD_VALUE;
2176                }
2177            }
2178            sp<DeviceDescriptor> devDesc =
2179                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2180            if (devDesc == 0) {
2181                return BAD_VALUE;
2182            }
2183
2184            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2185                                                         patch->sinks[0].sample_rate,
2186                                                         NULL, /*updatedSampleRate*/
2187                                                         patch->sinks[0].format,
2188                                                         patch->sinks[0].channel_mask,
2189                                                         // FIXME for the parameter type,
2190                                                         // and the NONE
2191                                                         (audio_output_flags_t)
2192                                                            AUDIO_INPUT_FLAG_NONE)) {
2193                return INVALID_OPERATION;
2194            }
2195            // TODO: reconfigure output format and channels here
2196            ALOGV("createAudioPatch() setting device %08x on output %d",
2197                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2198            setInputDevice(inputDesc->mIoHandle,
2199                           devDesc->mDeviceType,
2200                           true,
2201                           handle);
2202            index = mAudioPatches.indexOfKey(*handle);
2203            if (index >= 0) {
2204                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2205                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2206                }
2207                patchDesc = mAudioPatches.valueAt(index);
2208                patchDesc->mUid = uid;
2209                ALOGV("createAudioPatch() success");
2210            } else {
2211                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2212                return INVALID_OPERATION;
2213            }
2214        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2215            // device to device connection
2216            if (patchDesc != 0) {
2217                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id &&
2218                    patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2219                    return BAD_VALUE;
2220                }
2221            }
2222
2223            sp<DeviceDescriptor> srcDeviceDesc =
2224                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2225            sp<DeviceDescriptor> sinkDeviceDesc =
2226                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
2227            if (srcDeviceDesc == 0 || sinkDeviceDesc == 0) {
2228                return BAD_VALUE;
2229            }
2230            //update source and sink with our own data as the data passed in the patch may
2231            // be incomplete.
2232            struct audio_patch newPatch = *patch;
2233            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2234            sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[0], &patch->sinks[0]);
2235
2236            if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2237                SortedVector<audio_io_handle_t> outputs =
2238                                        getOutputsForDevice(sinkDeviceDesc->mDeviceType, mOutputs);
2239                // if the sink device is reachable via an opened output stream, request to go via
2240                // this output stream by adding a second source to the patch description
2241                audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
2242                if (output != AUDIO_IO_HANDLE_NONE) {
2243                    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2244                    if (outputDesc->isDuplicated()) {
2245                        return INVALID_OPERATION;
2246                    }
2247                    outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2248                    newPatch.num_sources = 2;
2249                }
2250            }
2251            // TODO: check from routing capabilities in config file and other conflicting patches
2252
2253            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2254            if (index >= 0) {
2255                afPatchHandle = patchDesc->mAfPatchHandle;
2256            }
2257
2258            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2259                                                                  &afPatchHandle,
2260                                                                  0);
2261            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2262                                                                  status, afPatchHandle);
2263            if (status == NO_ERROR) {
2264                if (index < 0) {
2265                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2266                                               &newPatch, uid);
2267                    addAudioPatch(patchDesc->mHandle, patchDesc);
2268                } else {
2269                    patchDesc->mPatch = newPatch;
2270                }
2271                patchDesc->mAfPatchHandle = afPatchHandle;
2272                *handle = patchDesc->mHandle;
2273                nextAudioPortGeneration();
2274                mpClientInterface->onAudioPatchListUpdate();
2275            } else {
2276                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2277                status);
2278                return INVALID_OPERATION;
2279            }
2280        } else {
2281            return BAD_VALUE;
2282        }
2283    } else {
2284        return BAD_VALUE;
2285    }
2286    return NO_ERROR;
2287}
2288
2289status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2290                                                  uid_t uid)
2291{
2292    ALOGV("releaseAudioPatch() patch %d", handle);
2293
2294    ssize_t index = mAudioPatches.indexOfKey(handle);
2295
2296    if (index < 0) {
2297        return BAD_VALUE;
2298    }
2299    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2300    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2301          mUidCached, patchDesc->mUid, uid);
2302    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2303        return INVALID_OPERATION;
2304    }
2305
2306    struct audio_patch *patch = &patchDesc->mPatch;
2307    patchDesc->mUid = mUidCached;
2308    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2309        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2310        if (outputDesc == NULL) {
2311            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2312            return BAD_VALUE;
2313        }
2314
2315        setOutputDevice(outputDesc->mIoHandle,
2316                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2317                       true,
2318                       0,
2319                       NULL);
2320    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2321        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2322            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2323            if (inputDesc == NULL) {
2324                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2325                return BAD_VALUE;
2326            }
2327            setInputDevice(inputDesc->mIoHandle,
2328                           getNewInputDevice(inputDesc->mIoHandle),
2329                           true,
2330                           NULL);
2331        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2332            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2333            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2334            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2335                                                              status, patchDesc->mAfPatchHandle);
2336            removeAudioPatch(patchDesc->mHandle);
2337            nextAudioPortGeneration();
2338            mpClientInterface->onAudioPatchListUpdate();
2339        } else {
2340            return BAD_VALUE;
2341        }
2342    } else {
2343        return BAD_VALUE;
2344    }
2345    return NO_ERROR;
2346}
2347
2348status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2349                                              struct audio_patch *patches,
2350                                              unsigned int *generation)
2351{
2352    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2353            generation == NULL) {
2354        return BAD_VALUE;
2355    }
2356    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2357          *num_patches, patches, mAudioPatches.size());
2358    if (patches == NULL) {
2359        *num_patches = 0;
2360    }
2361
2362    size_t patchesWritten = 0;
2363    size_t patchesMax = *num_patches;
2364    for (size_t i = 0;
2365            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2366        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2367        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2368        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2369              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2370    }
2371    *num_patches = mAudioPatches.size();
2372
2373    *generation = curAudioPortGeneration();
2374    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2375    return NO_ERROR;
2376}
2377
2378status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2379{
2380    ALOGV("setAudioPortConfig()");
2381
2382    if (config == NULL) {
2383        return BAD_VALUE;
2384    }
2385    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2386    // Only support gain configuration for now
2387    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2388        return INVALID_OPERATION;
2389    }
2390
2391    sp<AudioPortConfig> audioPortConfig;
2392    if (config->type == AUDIO_PORT_TYPE_MIX) {
2393        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2394            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2395            if (outputDesc == NULL) {
2396                return BAD_VALUE;
2397            }
2398            ALOG_ASSERT(!outputDesc->isDuplicated(),
2399                        "setAudioPortConfig() called on duplicated output %d",
2400                        outputDesc->mIoHandle);
2401            audioPortConfig = outputDesc;
2402        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2403            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2404            if (inputDesc == NULL) {
2405                return BAD_VALUE;
2406            }
2407            audioPortConfig = inputDesc;
2408        } else {
2409            return BAD_VALUE;
2410        }
2411    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2412        sp<DeviceDescriptor> deviceDesc;
2413        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2414            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2415        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2416            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2417        } else {
2418            return BAD_VALUE;
2419        }
2420        if (deviceDesc == NULL) {
2421            return BAD_VALUE;
2422        }
2423        audioPortConfig = deviceDesc;
2424    } else {
2425        return BAD_VALUE;
2426    }
2427
2428    struct audio_port_config backupConfig;
2429    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2430    if (status == NO_ERROR) {
2431        struct audio_port_config newConfig;
2432        audioPortConfig->toAudioPortConfig(&newConfig, config);
2433        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2434    }
2435    if (status != NO_ERROR) {
2436        audioPortConfig->applyAudioPortConfig(&backupConfig);
2437    }
2438
2439    return status;
2440}
2441
2442void AudioPolicyManager::clearAudioPatches(uid_t uid)
2443{
2444    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2445        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2446        if (patchDesc->mUid == uid) {
2447            // releaseAudioPatch() removes the patch from mAudioPatches
2448            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2449                i--;
2450            }
2451        }
2452    }
2453}
2454
2455status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2456                                       audio_io_handle_t *ioHandle,
2457                                       audio_devices_t *device)
2458{
2459    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2460    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2461    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2462
2463    mSoundTriggerSessions.add(*session, *ioHandle);
2464
2465    return NO_ERROR;
2466}
2467
2468status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2469{
2470    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2471    if (index < 0) {
2472        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2473        return BAD_VALUE;
2474    }
2475
2476    mSoundTriggerSessions.removeItem(session);
2477    return NO_ERROR;
2478}
2479
2480status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2481                                           const sp<AudioPatch>& patch)
2482{
2483    ssize_t index = mAudioPatches.indexOfKey(handle);
2484
2485    if (index >= 0) {
2486        ALOGW("addAudioPatch() patch %d already in", handle);
2487        return ALREADY_EXISTS;
2488    }
2489    mAudioPatches.add(handle, patch);
2490    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2491            "sink handle %d",
2492          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2493          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2494    return NO_ERROR;
2495}
2496
2497status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2498{
2499    ssize_t index = mAudioPatches.indexOfKey(handle);
2500
2501    if (index < 0) {
2502        ALOGW("removeAudioPatch() patch %d not in", handle);
2503        return ALREADY_EXISTS;
2504    }
2505    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2506                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2507    mAudioPatches.removeItemsAt(index);
2508    return NO_ERROR;
2509}
2510
2511// ----------------------------------------------------------------------------
2512// AudioPolicyManager
2513// ----------------------------------------------------------------------------
2514
2515uint32_t AudioPolicyManager::nextUniqueId()
2516{
2517    return android_atomic_inc(&mNextUniqueId);
2518}
2519
2520uint32_t AudioPolicyManager::nextAudioPortGeneration()
2521{
2522    return android_atomic_inc(&mAudioPortGeneration);
2523}
2524
2525AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2526    :
2527#ifdef AUDIO_POLICY_TEST
2528    Thread(false),
2529#endif //AUDIO_POLICY_TEST
2530    mPrimaryOutput((audio_io_handle_t)0),
2531    mPhoneState(AUDIO_MODE_NORMAL),
2532    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2533    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2534    mA2dpSuspended(false),
2535    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2536    mAudioPortGeneration(1)
2537{
2538    mUidCached = getuid();
2539    mpClientInterface = clientInterface;
2540
2541    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2542        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2543    }
2544
2545    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2546    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2547        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2548            ALOGE("could not load audio policy configuration file, setting defaults");
2549            defaultAudioPolicyConfig();
2550        }
2551    }
2552    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2553
2554    // must be done after reading the policy
2555    initializeVolumeCurves();
2556
2557    // open all output streams needed to access attached devices
2558    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2559    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2560    for (size_t i = 0; i < mHwModules.size(); i++) {
2561        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2562        if (mHwModules[i]->mHandle == 0) {
2563            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2564            continue;
2565        }
2566        // open all output streams needed to access attached devices
2567        // except for direct output streams that are only opened when they are actually
2568        // required by an app.
2569        // This also validates mAvailableOutputDevices list
2570        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2571        {
2572            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2573
2574            if (outProfile->mSupportedDevices.isEmpty()) {
2575                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2576                continue;
2577            }
2578
2579            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2580            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2581                profileType = mDefaultOutputDevice->mDeviceType;
2582            } else {
2583                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2584            }
2585            if ((profileType & outputDeviceTypes) &&
2586                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2587                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2588
2589                outputDesc->mDevice = profileType;
2590                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2591                config.sample_rate = outputDesc->mSamplingRate;
2592                config.channel_mask = outputDesc->mChannelMask;
2593                config.format = outputDesc->mFormat;
2594                audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2595                status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2596                                                                &output,
2597                                                                &config,
2598                                                                &outputDesc->mDevice,
2599                                                                String8(""),
2600                                                                &outputDesc->mLatency,
2601                                                                outputDesc->mFlags);
2602
2603                if (status != NO_ERROR) {
2604                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2605                          outputDesc->mDevice,
2606                          mHwModules[i]->mName);
2607                } else {
2608                    outputDesc->mSamplingRate = config.sample_rate;
2609                    outputDesc->mChannelMask = config.channel_mask;
2610                    outputDesc->mFormat = config.format;
2611
2612                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2613                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2614                        ssize_t index =
2615                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2616                        // give a valid ID to an attached device once confirmed it is reachable
2617                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2618                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2619                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2620                        }
2621                    }
2622                    if (mPrimaryOutput == 0 &&
2623                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2624                        mPrimaryOutput = output;
2625                    }
2626                    addOutput(output, outputDesc);
2627                    setOutputDevice(output,
2628                                    outputDesc->mDevice,
2629                                    true);
2630                }
2631            }
2632        }
2633        // open input streams needed to access attached devices to validate
2634        // mAvailableInputDevices list
2635        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2636        {
2637            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2638
2639            if (inProfile->mSupportedDevices.isEmpty()) {
2640                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2641                continue;
2642            }
2643
2644            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2645            if (profileType & inputDeviceTypes) {
2646                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2647
2648                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2649                inputDesc->mDevice = profileType;
2650
2651                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2652                config.sample_rate = inputDesc->mSamplingRate;
2653                config.channel_mask = inputDesc->mChannelMask;
2654                config.format = inputDesc->mFormat;
2655                audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2656                status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2657                                                               &input,
2658                                                               &config,
2659                                                               &inputDesc->mDevice,
2660                                                               String8(""),
2661                                                               AUDIO_SOURCE_MIC,
2662                                                               AUDIO_INPUT_FLAG_NONE);
2663
2664                if (status == NO_ERROR) {
2665                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2666                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2667                        ssize_t index =
2668                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2669                        // give a valid ID to an attached device once confirmed it is reachable
2670                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2671                            mAvailableInputDevices[index]->mId = nextUniqueId();
2672                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2673                        }
2674                    }
2675                    mpClientInterface->closeInput(input);
2676                } else {
2677                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2678                          inputDesc->mDevice,
2679                          mHwModules[i]->mName);
2680                }
2681            }
2682        }
2683    }
2684    // make sure all attached devices have been allocated a unique ID
2685    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2686        if (mAvailableOutputDevices[i]->mId == 0) {
2687            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2688            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2689            continue;
2690        }
2691        i++;
2692    }
2693    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2694        if (mAvailableInputDevices[i]->mId == 0) {
2695            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2696            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2697            continue;
2698        }
2699        i++;
2700    }
2701    // make sure default device is reachable
2702    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2703        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2704    }
2705
2706    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2707
2708    updateDevicesAndOutputs();
2709
2710#ifdef AUDIO_POLICY_TEST
2711    if (mPrimaryOutput != 0) {
2712        AudioParameter outputCmd = AudioParameter();
2713        outputCmd.addInt(String8("set_id"), 0);
2714        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2715
2716        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2717        mTestSamplingRate = 44100;
2718        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2719        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2720        mTestLatencyMs = 0;
2721        mCurOutput = 0;
2722        mDirectOutput = false;
2723        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2724            mTestOutputs[i] = 0;
2725        }
2726
2727        const size_t SIZE = 256;
2728        char buffer[SIZE];
2729        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2730        run(buffer, ANDROID_PRIORITY_AUDIO);
2731    }
2732#endif //AUDIO_POLICY_TEST
2733}
2734
2735AudioPolicyManager::~AudioPolicyManager()
2736{
2737#ifdef AUDIO_POLICY_TEST
2738    exit();
2739#endif //AUDIO_POLICY_TEST
2740   for (size_t i = 0; i < mOutputs.size(); i++) {
2741        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2742   }
2743   for (size_t i = 0; i < mInputs.size(); i++) {
2744        mpClientInterface->closeInput(mInputs.keyAt(i));
2745   }
2746   mAvailableOutputDevices.clear();
2747   mAvailableInputDevices.clear();
2748   mOutputs.clear();
2749   mInputs.clear();
2750   mHwModules.clear();
2751}
2752
2753status_t AudioPolicyManager::initCheck()
2754{
2755    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2756}
2757
2758#ifdef AUDIO_POLICY_TEST
2759bool AudioPolicyManager::threadLoop()
2760{
2761    ALOGV("entering threadLoop()");
2762    while (!exitPending())
2763    {
2764        String8 command;
2765        int valueInt;
2766        String8 value;
2767
2768        Mutex::Autolock _l(mLock);
2769        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2770
2771        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2772        AudioParameter param = AudioParameter(command);
2773
2774        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2775            valueInt != 0) {
2776            ALOGV("Test command %s received", command.string());
2777            String8 target;
2778            if (param.get(String8("target"), target) != NO_ERROR) {
2779                target = "Manager";
2780            }
2781            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2782                param.remove(String8("test_cmd_policy_output"));
2783                mCurOutput = valueInt;
2784            }
2785            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2786                param.remove(String8("test_cmd_policy_direct"));
2787                if (value == "false") {
2788                    mDirectOutput = false;
2789                } else if (value == "true") {
2790                    mDirectOutput = true;
2791                }
2792            }
2793            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2794                param.remove(String8("test_cmd_policy_input"));
2795                mTestInput = valueInt;
2796            }
2797
2798            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2799                param.remove(String8("test_cmd_policy_format"));
2800                int format = AUDIO_FORMAT_INVALID;
2801                if (value == "PCM 16 bits") {
2802                    format = AUDIO_FORMAT_PCM_16_BIT;
2803                } else if (value == "PCM 8 bits") {
2804                    format = AUDIO_FORMAT_PCM_8_BIT;
2805                } else if (value == "Compressed MP3") {
2806                    format = AUDIO_FORMAT_MP3;
2807                }
2808                if (format != AUDIO_FORMAT_INVALID) {
2809                    if (target == "Manager") {
2810                        mTestFormat = format;
2811                    } else if (mTestOutputs[mCurOutput] != 0) {
2812                        AudioParameter outputParam = AudioParameter();
2813                        outputParam.addInt(String8("format"), format);
2814                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2815                    }
2816                }
2817            }
2818            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2819                param.remove(String8("test_cmd_policy_channels"));
2820                int channels = 0;
2821
2822                if (value == "Channels Stereo") {
2823                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2824                } else if (value == "Channels Mono") {
2825                    channels =  AUDIO_CHANNEL_OUT_MONO;
2826                }
2827                if (channels != 0) {
2828                    if (target == "Manager") {
2829                        mTestChannels = channels;
2830                    } else if (mTestOutputs[mCurOutput] != 0) {
2831                        AudioParameter outputParam = AudioParameter();
2832                        outputParam.addInt(String8("channels"), channels);
2833                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2834                    }
2835                }
2836            }
2837            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2838                param.remove(String8("test_cmd_policy_sampleRate"));
2839                if (valueInt >= 0 && valueInt <= 96000) {
2840                    int samplingRate = valueInt;
2841                    if (target == "Manager") {
2842                        mTestSamplingRate = samplingRate;
2843                    } else if (mTestOutputs[mCurOutput] != 0) {
2844                        AudioParameter outputParam = AudioParameter();
2845                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2846                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2847                    }
2848                }
2849            }
2850
2851            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2852                param.remove(String8("test_cmd_policy_reopen"));
2853
2854                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2855                mpClientInterface->closeOutput(mPrimaryOutput);
2856
2857                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2858
2859                mOutputs.removeItem(mPrimaryOutput);
2860
2861                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2862                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2863                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2864                config.sample_rate = outputDesc->mSamplingRate;
2865                config.channel_mask = outputDesc->mChannelMask;
2866                config.format = outputDesc->mFormat;
2867                status_t status = mpClientInterface->openOutput(moduleHandle,
2868                                                                &mPrimaryOutput,
2869                                                                &config,
2870                                                                &outputDesc->mDevice,
2871                                                                String8(""),
2872                                                                &outputDesc->mLatency,
2873                                                                outputDesc->mFlags);
2874                if (status != NO_ERROR) {
2875                    ALOGE("Failed to reopen hardware output stream, "
2876                        "samplingRate: %d, format %d, channels %d",
2877                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2878                } else {
2879                    outputDesc->mSamplingRate = config.sample_rate;
2880                    outputDesc->mChannelMask = config.channel_mask;
2881                    outputDesc->mFormat = config.format;
2882                    AudioParameter outputCmd = AudioParameter();
2883                    outputCmd.addInt(String8("set_id"), 0);
2884                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2885                    addOutput(mPrimaryOutput, outputDesc);
2886                }
2887            }
2888
2889
2890            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2891        }
2892    }
2893    return false;
2894}
2895
2896void AudioPolicyManager::exit()
2897{
2898    {
2899        AutoMutex _l(mLock);
2900        requestExit();
2901        mWaitWorkCV.signal();
2902    }
2903    requestExitAndWait();
2904}
2905
2906int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2907{
2908    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2909        if (output == mTestOutputs[i]) return i;
2910    }
2911    return 0;
2912}
2913#endif //AUDIO_POLICY_TEST
2914
2915// ---
2916
2917void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2918{
2919    outputDesc->mIoHandle = output;
2920    outputDesc->mId = nextUniqueId();
2921    mOutputs.add(output, outputDesc);
2922    nextAudioPortGeneration();
2923}
2924
2925void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2926{
2927    inputDesc->mIoHandle = input;
2928    inputDesc->mId = nextUniqueId();
2929    mInputs.add(input, inputDesc);
2930    nextAudioPortGeneration();
2931}
2932
2933void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
2934        const String8 address /*in*/,
2935        SortedVector<audio_io_handle_t>& outputs /*out*/) {
2936    // look for a match on the given address on the addresses of the outputs:
2937    // find the address by finding the patch that maps to this output
2938    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
2939    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
2940    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
2941    if (patchIdx >= 0) {
2942        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
2943        const int numSinks = patchDesc->mPatch.num_sinks;
2944        for (ssize_t j=0; j < numSinks; j++) {
2945            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
2946                const char* patchAddr =
2947                        patchDesc->mPatch.sinks[j].ext.device.address;
2948                if (strncmp(patchAddr,
2949                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
2950                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
2951                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
2952                    outputs.add(desc->mIoHandle);
2953                    break;
2954                }
2955            }
2956        }
2957    }
2958}
2959
2960status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
2961                                                       audio_policy_dev_state_t state,
2962                                                       SortedVector<audio_io_handle_t>& outputs,
2963                                                       const String8 address)
2964{
2965    audio_devices_t device = devDesc->mDeviceType;
2966    sp<AudioOutputDescriptor> desc;
2967    // erase all current sample rates, formats and channel masks
2968    devDesc->clearCapabilities();
2969
2970    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
2971        // first list already open outputs that can be routed to this device
2972        for (size_t i = 0; i < mOutputs.size(); i++) {
2973            desc = mOutputs.valueAt(i);
2974            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
2975                if (!deviceDistinguishesOnAddress(device)) {
2976                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
2977                    outputs.add(mOutputs.keyAt(i));
2978                } else {
2979                    ALOGV("  checking address match due to device 0x%x", device);
2980                    findIoHandlesByAddress(desc, address, outputs);
2981                }
2982            }
2983        }
2984        // then look for output profiles that can be routed to this device
2985        SortedVector< sp<IOProfile> > profiles;
2986        for (size_t i = 0; i < mHwModules.size(); i++)
2987        {
2988            if (mHwModules[i]->mHandle == 0) {
2989                continue;
2990            }
2991            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2992            {
2993                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2994                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
2995                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
2996                }
2997            }
2998        }
2999
3000        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3001
3002        if (profiles.isEmpty() && outputs.isEmpty()) {
3003            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3004            return BAD_VALUE;
3005        }
3006
3007        // open outputs for matching profiles if needed. Direct outputs are also opened to
3008        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3009        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3010            sp<IOProfile> profile = profiles[profile_index];
3011
3012            // nothing to do if one output is already opened for this profile
3013            size_t j;
3014            for (j = 0; j < outputs.size(); j++) {
3015                desc = mOutputs.valueFor(outputs.itemAt(j));
3016                if (!desc->isDuplicated() && desc->mProfile == profile) {
3017                    // matching profile: save the sample rates, format and channel masks supported
3018                    // by the profile in our device descriptor
3019                    devDesc->importAudioPort(profile);
3020                    break;
3021                }
3022            }
3023            if (j != outputs.size()) {
3024                continue;
3025            }
3026
3027            ALOGV("opening output for device %08x with params %s profile %p",
3028                                                      device, address.string(), profile.get());
3029            desc = new AudioOutputDescriptor(profile);
3030            desc->mDevice = device;
3031            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3032            config.sample_rate = desc->mSamplingRate;
3033            config.channel_mask = desc->mChannelMask;
3034            config.format = desc->mFormat;
3035            config.offload_info.sample_rate = desc->mSamplingRate;
3036            config.offload_info.channel_mask = desc->mChannelMask;
3037            config.offload_info.format = desc->mFormat;
3038            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3039            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3040                                                            &output,
3041                                                            &config,
3042                                                            &desc->mDevice,
3043                                                            address,
3044                                                            &desc->mLatency,
3045                                                            desc->mFlags);
3046            if (status == NO_ERROR) {
3047                desc->mSamplingRate = config.sample_rate;
3048                desc->mChannelMask = config.channel_mask;
3049                desc->mFormat = config.format;
3050
3051                // Here is where the out_set_parameters() for card & device gets called
3052                if (!address.isEmpty()) {
3053                    char *param = audio_device_address_to_parameter(device, address);
3054                    mpClientInterface->setParameters(output, String8(param));
3055                    free(param);
3056                }
3057
3058                // Here is where we step through and resolve any "dynamic" fields
3059                String8 reply;
3060                char *value;
3061                if (profile->mSamplingRates[0] == 0) {
3062                    reply = mpClientInterface->getParameters(output,
3063                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3064                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3065                              reply.string());
3066                    value = strpbrk((char *)reply.string(), "=");
3067                    if (value != NULL) {
3068                        profile->loadSamplingRates(value + 1);
3069                    }
3070                }
3071                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3072                    reply = mpClientInterface->getParameters(output,
3073                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3074                    ALOGV("checkOutputsForDevice() supported formats %s",
3075                              reply.string());
3076                    value = strpbrk((char *)reply.string(), "=");
3077                    if (value != NULL) {
3078                        profile->loadFormats(value + 1);
3079                    }
3080                }
3081                if (profile->mChannelMasks[0] == 0) {
3082                    reply = mpClientInterface->getParameters(output,
3083                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3084                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3085                              reply.string());
3086                    value = strpbrk((char *)reply.string(), "=");
3087                    if (value != NULL) {
3088                        profile->loadOutChannels(value + 1);
3089                    }
3090                }
3091                if (((profile->mSamplingRates[0] == 0) &&
3092                         (profile->mSamplingRates.size() < 2)) ||
3093                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3094                         (profile->mFormats.size() < 2)) ||
3095                     ((profile->mChannelMasks[0] == 0) &&
3096                         (profile->mChannelMasks.size() < 2))) {
3097                    ALOGW("checkOutputsForDevice() missing param");
3098                    mpClientInterface->closeOutput(output);
3099                    output = AUDIO_IO_HANDLE_NONE;
3100                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3101                            profile->mChannelMasks[0] == 0) {
3102                    mpClientInterface->closeOutput(output);
3103                    config.sample_rate = profile->pickSamplingRate();
3104                    config.channel_mask = profile->pickChannelMask();
3105                    config.format = profile->pickFormat();
3106                    config.offload_info.sample_rate = config.sample_rate;
3107                    config.offload_info.channel_mask = config.channel_mask;
3108                    config.offload_info.format = config.format;
3109                    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                    } else {
3121                        output = AUDIO_IO_HANDLE_NONE;
3122                    }
3123                }
3124
3125                if (output != AUDIO_IO_HANDLE_NONE) {
3126                    addOutput(output, desc);
3127                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3128                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3129
3130                        // set initial stream volume for device
3131                        applyStreamVolumes(output, device, 0, true);
3132
3133                        //TODO: configure audio effect output stage here
3134
3135                        // open a duplicating output thread for the new output and the primary output
3136                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3137                                                                                  mPrimaryOutput);
3138                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3139                            // add duplicated output descriptor
3140                            sp<AudioOutputDescriptor> dupOutputDesc =
3141                                    new AudioOutputDescriptor(NULL);
3142                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3143                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3144                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3145                            dupOutputDesc->mFormat = desc->mFormat;
3146                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3147                            dupOutputDesc->mLatency = desc->mLatency;
3148                            addOutput(duplicatedOutput, dupOutputDesc);
3149                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3150                        } else {
3151                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3152                                    mPrimaryOutput, output);
3153                            mpClientInterface->closeOutput(output);
3154                            mOutputs.removeItem(output);
3155                            nextAudioPortGeneration();
3156                            output = AUDIO_IO_HANDLE_NONE;
3157                        }
3158                    }
3159                }
3160            } else {
3161                output = AUDIO_IO_HANDLE_NONE;
3162            }
3163            if (output == AUDIO_IO_HANDLE_NONE) {
3164                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3165                profiles.removeAt(profile_index);
3166                profile_index--;
3167            } else {
3168                outputs.add(output);
3169                devDesc->importAudioPort(profile);
3170
3171                if (deviceDistinguishesOnAddress(device)) {
3172                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3173                            device, address.string());
3174                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3175                            NULL/*patch handle*/, address.string());
3176                }
3177                ALOGV("checkOutputsForDevice(): adding output %d", output);
3178            }
3179        }
3180
3181        if (profiles.isEmpty()) {
3182            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3183            return BAD_VALUE;
3184        }
3185    } else { // Disconnect
3186        // check if one opened output is not needed any more after disconnecting one device
3187        for (size_t i = 0; i < mOutputs.size(); i++) {
3188            desc = mOutputs.valueAt(i);
3189            if (!desc->isDuplicated()) {
3190                if  (!(desc->mProfile->mSupportedDevices.types()
3191                        & mAvailableOutputDevices.types())) {
3192                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3193                            mOutputs.keyAt(i));
3194                    outputs.add(mOutputs.keyAt(i));
3195                } else if (deviceDistinguishesOnAddress(device) &&
3196                        // exact match on device
3197                        (desc->mProfile->mSupportedDevices.types() == device)) {
3198                    findIoHandlesByAddress(desc, address, outputs);
3199                }
3200            }
3201        }
3202        // Clear any profiles associated with the disconnected device.
3203        for (size_t i = 0; i < mHwModules.size(); i++)
3204        {
3205            if (mHwModules[i]->mHandle == 0) {
3206                continue;
3207            }
3208            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3209            {
3210                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3211                if (profile->mSupportedDevices.types() & device) {
3212                    ALOGV("checkOutputsForDevice(): "
3213                            "clearing direct output profile %zu on module %zu", j, i);
3214                    if (profile->mSamplingRates[0] == 0) {
3215                        profile->mSamplingRates.clear();
3216                        profile->mSamplingRates.add(0);
3217                    }
3218                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3219                        profile->mFormats.clear();
3220                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3221                    }
3222                    if (profile->mChannelMasks[0] == 0) {
3223                        profile->mChannelMasks.clear();
3224                        profile->mChannelMasks.add(0);
3225                    }
3226                }
3227            }
3228        }
3229    }
3230    return NO_ERROR;
3231}
3232
3233status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3234                                                      audio_policy_dev_state_t state,
3235                                                      SortedVector<audio_io_handle_t>& inputs,
3236                                                      const String8 address)
3237{
3238    sp<AudioInputDescriptor> desc;
3239    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3240        // first list already open inputs that can be routed to this device
3241        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3242            desc = mInputs.valueAt(input_index);
3243            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3244                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3245               inputs.add(mInputs.keyAt(input_index));
3246            }
3247        }
3248
3249        // then look for input profiles that can be routed to this device
3250        SortedVector< sp<IOProfile> > profiles;
3251        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3252        {
3253            if (mHwModules[module_idx]->mHandle == 0) {
3254                continue;
3255            }
3256            for (size_t profile_index = 0;
3257                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3258                 profile_index++)
3259            {
3260                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3261                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3262                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3263                          profile_index, module_idx);
3264                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3265                }
3266            }
3267        }
3268
3269        if (profiles.isEmpty() && inputs.isEmpty()) {
3270            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3271            return BAD_VALUE;
3272        }
3273
3274        // open inputs for matching profiles if needed. Direct inputs are also opened to
3275        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3276        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3277
3278            sp<IOProfile> profile = profiles[profile_index];
3279            // nothing to do if one input is already opened for this profile
3280            size_t input_index;
3281            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3282                desc = mInputs.valueAt(input_index);
3283                if (desc->mProfile == profile) {
3284                    break;
3285                }
3286            }
3287            if (input_index != mInputs.size()) {
3288                continue;
3289            }
3290
3291            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3292            desc = new AudioInputDescriptor(profile);
3293            desc->mDevice = device;
3294            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3295            config.sample_rate = desc->mSamplingRate;
3296            config.channel_mask = desc->mChannelMask;
3297            config.format = desc->mFormat;
3298            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3299            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3300                                                           &input,
3301                                                           &config,
3302                                                           &desc->mDevice,
3303                                                           address,
3304                                                           AUDIO_SOURCE_MIC,
3305                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3306
3307            if (status == NO_ERROR) {
3308                desc->mSamplingRate = config.sample_rate;
3309                desc->mChannelMask = config.channel_mask;
3310                desc->mFormat = config.format;
3311
3312                if (!address.isEmpty()) {
3313                    char *param = audio_device_address_to_parameter(device, address);
3314                    mpClientInterface->setParameters(input, String8(param));
3315                    free(param);
3316                }
3317
3318                // Here is where we step through and resolve any "dynamic" fields
3319                String8 reply;
3320                char *value;
3321                if (profile->mSamplingRates[0] == 0) {
3322                    reply = mpClientInterface->getParameters(input,
3323                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3324                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3325                              reply.string());
3326                    value = strpbrk((char *)reply.string(), "=");
3327                    if (value != NULL) {
3328                        profile->loadSamplingRates(value + 1);
3329                    }
3330                }
3331                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3332                    reply = mpClientInterface->getParameters(input,
3333                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3334                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3335                    value = strpbrk((char *)reply.string(), "=");
3336                    if (value != NULL) {
3337                        profile->loadFormats(value + 1);
3338                    }
3339                }
3340                if (profile->mChannelMasks[0] == 0) {
3341                    reply = mpClientInterface->getParameters(input,
3342                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3343                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3344                              reply.string());
3345                    value = strpbrk((char *)reply.string(), "=");
3346                    if (value != NULL) {
3347                        profile->loadInChannels(value + 1);
3348                    }
3349                }
3350                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3351                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3352                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3353                    ALOGW("checkInputsForDevice() direct input missing param");
3354                    mpClientInterface->closeInput(input);
3355                    input = AUDIO_IO_HANDLE_NONE;
3356                }
3357
3358                if (input != 0) {
3359                    addInput(input, desc);
3360                }
3361            } // endif input != 0
3362
3363            if (input == AUDIO_IO_HANDLE_NONE) {
3364                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3365                profiles.removeAt(profile_index);
3366                profile_index--;
3367            } else {
3368                inputs.add(input);
3369                ALOGV("checkInputsForDevice(): adding input %d", input);
3370            }
3371        } // end scan profiles
3372
3373        if (profiles.isEmpty()) {
3374            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3375            return BAD_VALUE;
3376        }
3377    } else {
3378        // Disconnect
3379        // check if one opened input is not needed any more after disconnecting one device
3380        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3381            desc = mInputs.valueAt(input_index);
3382            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3383                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3384                      mInputs.keyAt(input_index));
3385                inputs.add(mInputs.keyAt(input_index));
3386            }
3387        }
3388        // Clear any profiles associated with the disconnected device.
3389        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3390            if (mHwModules[module_index]->mHandle == 0) {
3391                continue;
3392            }
3393            for (size_t profile_index = 0;
3394                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3395                 profile_index++) {
3396                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3397                if (profile->mSupportedDevices.types() & device) {
3398                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3399                          profile_index, module_index);
3400                    if (profile->mSamplingRates[0] == 0) {
3401                        profile->mSamplingRates.clear();
3402                        profile->mSamplingRates.add(0);
3403                    }
3404                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3405                        profile->mFormats.clear();
3406                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3407                    }
3408                    if (profile->mChannelMasks[0] == 0) {
3409                        profile->mChannelMasks.clear();
3410                        profile->mChannelMasks.add(0);
3411                    }
3412                }
3413            }
3414        }
3415    } // end disconnect
3416
3417    return NO_ERROR;
3418}
3419
3420
3421void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3422{
3423    ALOGV("closeOutput(%d)", output);
3424
3425    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3426    if (outputDesc == NULL) {
3427        ALOGW("closeOutput() unknown output %d", output);
3428        return;
3429    }
3430
3431    // look for duplicated outputs connected to the output being removed.
3432    for (size_t i = 0; i < mOutputs.size(); i++) {
3433        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3434        if (dupOutputDesc->isDuplicated() &&
3435                (dupOutputDesc->mOutput1 == outputDesc ||
3436                dupOutputDesc->mOutput2 == outputDesc)) {
3437            sp<AudioOutputDescriptor> outputDesc2;
3438            if (dupOutputDesc->mOutput1 == outputDesc) {
3439                outputDesc2 = dupOutputDesc->mOutput2;
3440            } else {
3441                outputDesc2 = dupOutputDesc->mOutput1;
3442            }
3443            // As all active tracks on duplicated output will be deleted,
3444            // and as they were also referenced on the other output, the reference
3445            // count for their stream type must be adjusted accordingly on
3446            // the other output.
3447            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3448                int refCount = dupOutputDesc->mRefCount[j];
3449                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3450            }
3451            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3452            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3453
3454            mpClientInterface->closeOutput(duplicatedOutput);
3455            mOutputs.removeItem(duplicatedOutput);
3456        }
3457    }
3458
3459    AudioParameter param;
3460    param.add(String8("closing"), String8("true"));
3461    mpClientInterface->setParameters(output, param.toString());
3462
3463    mpClientInterface->closeOutput(output);
3464    mOutputs.removeItem(output);
3465    mPreviousOutputs = mOutputs;
3466    nextAudioPortGeneration();
3467}
3468
3469SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3470                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3471{
3472    SortedVector<audio_io_handle_t> outputs;
3473
3474    ALOGVV("getOutputsForDevice() device %04x", device);
3475    for (size_t i = 0; i < openOutputs.size(); i++) {
3476        ALOGVV("output %d isDuplicated=%d device=%04x",
3477                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3478        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3479            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3480            outputs.add(openOutputs.keyAt(i));
3481        }
3482    }
3483    return outputs;
3484}
3485
3486bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3487                                   SortedVector<audio_io_handle_t>& outputs2)
3488{
3489    if (outputs1.size() != outputs2.size()) {
3490        return false;
3491    }
3492    for (size_t i = 0; i < outputs1.size(); i++) {
3493        if (outputs1[i] != outputs2[i]) {
3494            return false;
3495        }
3496    }
3497    return true;
3498}
3499
3500void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3501{
3502    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3503    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3504    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3505    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3506
3507    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3508        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3509              strategy, srcOutputs[0], dstOutputs[0]);
3510        // mute strategy while moving tracks from one output to another
3511        for (size_t i = 0; i < srcOutputs.size(); i++) {
3512            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3513            if (desc->isStrategyActive(strategy)) {
3514                setStrategyMute(strategy, true, srcOutputs[i]);
3515                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3516            }
3517        }
3518
3519        // Move effects associated to this strategy from previous output to new output
3520        if (strategy == STRATEGY_MEDIA) {
3521            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3522            SortedVector<audio_io_handle_t> moved;
3523            for (size_t i = 0; i < mEffects.size(); i++) {
3524                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3525                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3526                        effectDesc->mIo != fxOutput) {
3527                    if (moved.indexOf(effectDesc->mIo) < 0) {
3528                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3529                              mEffects.keyAt(i), fxOutput);
3530                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3531                                                       fxOutput);
3532                        moved.add(effectDesc->mIo);
3533                    }
3534                    effectDesc->mIo = fxOutput;
3535                }
3536            }
3537        }
3538        // Move tracks associated to this strategy from previous output to new output
3539        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3540            if (getStrategy((audio_stream_type_t)i) == strategy) {
3541                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3542            }
3543        }
3544    }
3545}
3546
3547void AudioPolicyManager::checkOutputForAllStrategies()
3548{
3549    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3550    checkOutputForStrategy(STRATEGY_PHONE);
3551    checkOutputForStrategy(STRATEGY_SONIFICATION);
3552    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3553    checkOutputForStrategy(STRATEGY_MEDIA);
3554    checkOutputForStrategy(STRATEGY_DTMF);
3555}
3556
3557audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3558{
3559    for (size_t i = 0; i < mOutputs.size(); i++) {
3560        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3561        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3562            return mOutputs.keyAt(i);
3563        }
3564    }
3565
3566    return 0;
3567}
3568
3569void AudioPolicyManager::checkA2dpSuspend()
3570{
3571    audio_io_handle_t a2dpOutput = getA2dpOutput();
3572    if (a2dpOutput == 0) {
3573        mA2dpSuspended = false;
3574        return;
3575    }
3576
3577    bool isScoConnected =
3578            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3579    // suspend A2DP output if:
3580    //      (NOT already suspended) &&
3581    //      ((SCO device is connected &&
3582    //       (forced usage for communication || for record is SCO))) ||
3583    //      (phone state is ringing || in call)
3584    //
3585    // restore A2DP output if:
3586    //      (Already suspended) &&
3587    //      ((SCO device is NOT connected ||
3588    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3589    //      (phone state is NOT ringing && NOT in call)
3590    //
3591    if (mA2dpSuspended) {
3592        if ((!isScoConnected ||
3593             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3594              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3595             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3596              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3597
3598            mpClientInterface->restoreOutput(a2dpOutput);
3599            mA2dpSuspended = false;
3600        }
3601    } else {
3602        if ((isScoConnected &&
3603             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3604              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3605             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3606              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3607
3608            mpClientInterface->suspendOutput(a2dpOutput);
3609            mA2dpSuspended = true;
3610        }
3611    }
3612}
3613
3614audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3615{
3616    audio_devices_t device = AUDIO_DEVICE_NONE;
3617
3618    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3619
3620    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3621    if (index >= 0) {
3622        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3623        if (patchDesc->mUid != mUidCached) {
3624            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3625                  outputDesc->device(), outputDesc->mPatchHandle);
3626            return outputDesc->device();
3627        }
3628    }
3629
3630    // check the following by order of priority to request a routing change if necessary:
3631    // 1: the strategy enforced audible is active on the output:
3632    //      use device for strategy enforced audible
3633    // 2: we are in call or the strategy phone is active on the output:
3634    //      use device for strategy phone
3635    // 3: the strategy sonification is active on the output:
3636    //      use device for strategy sonification
3637    // 4: the strategy "respectful" sonification is active on the output:
3638    //      use device for strategy "respectful" sonification
3639    // 5: the strategy media is active on the output:
3640    //      use device for strategy media
3641    // 6: the strategy DTMF is active on the output:
3642    //      use device for strategy DTMF
3643    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3644        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3645    } else if (isInCall() ||
3646                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3647        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3648    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3649        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3650    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3651        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3652    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3653        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3654    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3655        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3656    }
3657
3658    ALOGV("getNewOutputDevice() selected device %x", device);
3659    return device;
3660}
3661
3662audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3663{
3664    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3665
3666    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3667    if (index >= 0) {
3668        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3669        if (patchDesc->mUid != mUidCached) {
3670            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3671                  inputDesc->mDevice, inputDesc->mPatchHandle);
3672            return inputDesc->mDevice;
3673        }
3674    }
3675
3676    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3677
3678    ALOGV("getNewInputDevice() selected device %x", device);
3679    return device;
3680}
3681
3682uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3683    return (uint32_t)getStrategy(stream);
3684}
3685
3686audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3687    // By checking the range of stream before calling getStrategy, we avoid
3688    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3689    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3690    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3691        return AUDIO_DEVICE_NONE;
3692    }
3693    audio_devices_t devices;
3694    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3695    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3696    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3697    for (size_t i = 0; i < outputs.size(); i++) {
3698        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3699        if (outputDesc->isStrategyActive(strategy)) {
3700            devices = outputDesc->device();
3701            break;
3702        }
3703    }
3704    return devices;
3705}
3706
3707AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3708        audio_stream_type_t stream) {
3709    // stream to strategy mapping
3710    switch (stream) {
3711    case AUDIO_STREAM_VOICE_CALL:
3712    case AUDIO_STREAM_BLUETOOTH_SCO:
3713        return STRATEGY_PHONE;
3714    case AUDIO_STREAM_RING:
3715    case AUDIO_STREAM_ALARM:
3716        return STRATEGY_SONIFICATION;
3717    case AUDIO_STREAM_NOTIFICATION:
3718        return STRATEGY_SONIFICATION_RESPECTFUL;
3719    case AUDIO_STREAM_DTMF:
3720        return STRATEGY_DTMF;
3721    default:
3722        ALOGE("unknown stream type");
3723    case AUDIO_STREAM_SYSTEM:
3724        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3725        // while key clicks are played produces a poor result
3726    case AUDIO_STREAM_TTS:
3727    case AUDIO_STREAM_MUSIC:
3728        return STRATEGY_MEDIA;
3729    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3730        return STRATEGY_ENFORCED_AUDIBLE;
3731    }
3732}
3733
3734uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3735    // flags to strategy mapping
3736    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3737        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3738    }
3739
3740    // usage to strategy mapping
3741    switch (attr->usage) {
3742    case AUDIO_USAGE_MEDIA:
3743    case AUDIO_USAGE_GAME:
3744    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3745    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3746    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3747        return (uint32_t) STRATEGY_MEDIA;
3748
3749    case AUDIO_USAGE_VOICE_COMMUNICATION:
3750        return (uint32_t) STRATEGY_PHONE;
3751
3752    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3753        return (uint32_t) STRATEGY_DTMF;
3754
3755    case AUDIO_USAGE_ALARM:
3756    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3757        return (uint32_t) STRATEGY_SONIFICATION;
3758
3759    case AUDIO_USAGE_NOTIFICATION:
3760    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3761    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3762    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3763    case AUDIO_USAGE_NOTIFICATION_EVENT:
3764        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3765
3766    case AUDIO_USAGE_UNKNOWN:
3767    default:
3768        return (uint32_t) STRATEGY_MEDIA;
3769    }
3770}
3771
3772void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3773    switch(stream) {
3774    case AUDIO_STREAM_MUSIC:
3775        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3776        updateDevicesAndOutputs();
3777        break;
3778    default:
3779        break;
3780    }
3781}
3782
3783audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3784                                                             bool fromCache)
3785{
3786    uint32_t device = AUDIO_DEVICE_NONE;
3787
3788    if (fromCache) {
3789        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3790              strategy, mDeviceForStrategy[strategy]);
3791        return mDeviceForStrategy[strategy];
3792    }
3793    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3794    switch (strategy) {
3795
3796    case STRATEGY_SONIFICATION_RESPECTFUL:
3797        if (isInCall()) {
3798            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3799        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3800                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3801            // while media is playing on a remote device, use the the sonification behavior.
3802            // Note that we test this usecase before testing if media is playing because
3803            //   the isStreamActive() method only informs about the activity of a stream, not
3804            //   if it's for local playback. Note also that we use the same delay between both tests
3805            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3806        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3807            // while media is playing (or has recently played), use the same device
3808            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3809        } else {
3810            // when media is not playing anymore, fall back on the sonification behavior
3811            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3812        }
3813
3814        break;
3815
3816    case STRATEGY_DTMF:
3817        if (!isInCall()) {
3818            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3819            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3820            break;
3821        }
3822        // when in call, DTMF and PHONE strategies follow the same rules
3823        // FALL THROUGH
3824
3825    case STRATEGY_PHONE:
3826        // Force use of only devices on primary output if:
3827        // - in call AND
3828        //   - cannot route from voice call RX OR
3829        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
3830        if (mPhoneState == AUDIO_MODE_IN_CALL) {
3831            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
3832            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
3833            if (((mAvailableInputDevices.types() &
3834                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
3835                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
3836                         (hwOutputDesc->mAudioPort->mModule->mHalVersion <
3837                             AUDIO_DEVICE_API_VERSION_3_0))) {
3838                availableOutputDeviceTypes = availablePrimaryOutputDevices();
3839            }
3840        }
3841        // for phone strategy, we first consider the forced use and then the available devices by order
3842        // of priority
3843        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3844        case AUDIO_POLICY_FORCE_BT_SCO:
3845            if (!isInCall() || strategy != STRATEGY_DTMF) {
3846                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3847                if (device) break;
3848            }
3849            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3850            if (device) break;
3851            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3852            if (device) break;
3853            // if SCO device is requested but no SCO device is available, fall back to default case
3854            // FALL THROUGH
3855
3856        default:    // FORCE_NONE
3857            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3858            if (!isInCall() &&
3859                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3860                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3861                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3862                if (device) break;
3863                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3864                if (device) break;
3865            }
3866            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3867            if (device) break;
3868            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3869            if (device) break;
3870            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3871            if (device) break;
3872            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3873                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3874                if (device) break;
3875                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3876                if (device) break;
3877                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3878                if (device) break;
3879                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3880                if (device) break;
3881            }
3882            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3883            if (device) break;
3884            device = mDefaultOutputDevice->mDeviceType;
3885            if (device == AUDIO_DEVICE_NONE) {
3886                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3887            }
3888            break;
3889
3890        case AUDIO_POLICY_FORCE_SPEAKER:
3891            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3892            // A2DP speaker when forcing to speaker output
3893            if (!isInCall() &&
3894                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3895                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3896                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3897                if (device) break;
3898            }
3899            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3900                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3901                if (device) break;
3902                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3903                if (device) break;
3904                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3905                if (device) break;
3906                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3907                if (device) break;
3908                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3909                if (device) break;
3910            }
3911            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
3912            if (device) break;
3913            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3914            if (device) break;
3915            device = mDefaultOutputDevice->mDeviceType;
3916            if (device == AUDIO_DEVICE_NONE) {
3917                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
3918            }
3919            break;
3920        }
3921    break;
3922
3923    case STRATEGY_SONIFICATION:
3924
3925        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
3926        // handleIncallSonification().
3927        if (isInCall()) {
3928            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
3929            break;
3930        }
3931        // FALL THROUGH
3932
3933    case STRATEGY_ENFORCED_AUDIBLE:
3934        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
3935        // except:
3936        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
3937        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
3938
3939        if ((strategy == STRATEGY_SONIFICATION) ||
3940                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
3941            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3942            if (device == AUDIO_DEVICE_NONE) {
3943                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
3944            }
3945        }
3946        // The second device used for sonification is the same as the device used by media strategy
3947        // FALL THROUGH
3948
3949    case STRATEGY_MEDIA: {
3950        uint32_t device2 = AUDIO_DEVICE_NONE;
3951        if (strategy != STRATEGY_SONIFICATION) {
3952            // no sonification on remote submix (e.g. WFD)
3953            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
3954        }
3955        if ((device2 == AUDIO_DEVICE_NONE) &&
3956                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3957                (getA2dpOutput() != 0) && !mA2dpSuspended) {
3958            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3959            if (device2 == AUDIO_DEVICE_NONE) {
3960                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3961            }
3962            if (device2 == AUDIO_DEVICE_NONE) {
3963                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3964            }
3965        }
3966        if (device2 == AUDIO_DEVICE_NONE) {
3967            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3968        }
3969        if ((device2 == AUDIO_DEVICE_NONE)) {
3970            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
3971        }
3972        if (device2 == AUDIO_DEVICE_NONE) {
3973            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3974        }
3975        if (device2 == AUDIO_DEVICE_NONE) {
3976            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3977        }
3978        if (device2 == AUDIO_DEVICE_NONE) {
3979            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3980        }
3981        if (device2 == AUDIO_DEVICE_NONE) {
3982            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3983        }
3984        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
3985            // no sonification on aux digital (e.g. HDMI)
3986            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3987        }
3988        if ((device2 == AUDIO_DEVICE_NONE) &&
3989                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
3990            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3991        }
3992        if (device2 == AUDIO_DEVICE_NONE) {
3993            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3994        }
3995        int device3 = AUDIO_DEVICE_NONE;
3996        if (strategy == STRATEGY_MEDIA) {
3997            // ARC, SPDIF and AUX_LINE can co-exist with others.
3998            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
3999            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4000            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4001        }
4002
4003        device2 |= device3;
4004        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4005        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4006        device |= device2;
4007
4008        // If hdmi system audio mode is on, remove speaker out of output list.
4009        if ((strategy == STRATEGY_MEDIA) &&
4010            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4011                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4012            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4013        }
4014
4015        if (device) break;
4016        device = mDefaultOutputDevice->mDeviceType;
4017        if (device == AUDIO_DEVICE_NONE) {
4018            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4019        }
4020        } break;
4021
4022    default:
4023        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4024        break;
4025    }
4026
4027    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4028    return device;
4029}
4030
4031void AudioPolicyManager::updateDevicesAndOutputs()
4032{
4033    for (int i = 0; i < NUM_STRATEGIES; i++) {
4034        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4035    }
4036    mPreviousOutputs = mOutputs;
4037}
4038
4039uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4040                                                       audio_devices_t prevDevice,
4041                                                       uint32_t delayMs)
4042{
4043    // mute/unmute strategies using an incompatible device combination
4044    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4045    // if unmuting, unmute only after the specified delay
4046    if (outputDesc->isDuplicated()) {
4047        return 0;
4048    }
4049
4050    uint32_t muteWaitMs = 0;
4051    audio_devices_t device = outputDesc->device();
4052    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4053
4054    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4055        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4056        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4057        bool doMute = false;
4058
4059        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4060            doMute = true;
4061            outputDesc->mStrategyMutedByDevice[i] = true;
4062        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4063            doMute = true;
4064            outputDesc->mStrategyMutedByDevice[i] = false;
4065        }
4066        if (doMute) {
4067            for (size_t j = 0; j < mOutputs.size(); j++) {
4068                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4069                // skip output if it does not share any device with current output
4070                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4071                        == AUDIO_DEVICE_NONE) {
4072                    continue;
4073                }
4074                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4075                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4076                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4077                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4078                if (desc->isStrategyActive((routing_strategy)i)) {
4079                    if (mute) {
4080                        // FIXME: should not need to double latency if volume could be applied
4081                        // immediately by the audioflinger mixer. We must account for the delay
4082                        // between now and the next time the audioflinger thread for this output
4083                        // will process a buffer (which corresponds to one buffer size,
4084                        // usually 1/2 or 1/4 of the latency).
4085                        if (muteWaitMs < desc->latency() * 2) {
4086                            muteWaitMs = desc->latency() * 2;
4087                        }
4088                    }
4089                }
4090            }
4091        }
4092    }
4093
4094    // temporary mute output if device selection changes to avoid volume bursts due to
4095    // different per device volumes
4096    if (outputDesc->isActive() && (device != prevDevice)) {
4097        if (muteWaitMs < outputDesc->latency() * 2) {
4098            muteWaitMs = outputDesc->latency() * 2;
4099        }
4100        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4101            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4102                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4103                // do tempMute unmute after twice the mute wait time
4104                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4105                                muteWaitMs *2, device);
4106            }
4107        }
4108    }
4109
4110    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4111    if (muteWaitMs > delayMs) {
4112        muteWaitMs -= delayMs;
4113        usleep(muteWaitMs * 1000);
4114        return muteWaitMs;
4115    }
4116    return 0;
4117}
4118
4119uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4120                                             audio_devices_t device,
4121                                             bool force,
4122                                             int delayMs,
4123                                             audio_patch_handle_t *patchHandle,
4124                                             const char* address)
4125{
4126    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4127    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4128    AudioParameter param;
4129    uint32_t muteWaitMs;
4130
4131    if (outputDesc->isDuplicated()) {
4132        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4133        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4134        return muteWaitMs;
4135    }
4136    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4137    // output profile
4138    if ((device != AUDIO_DEVICE_NONE) &&
4139            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4140        return 0;
4141    }
4142
4143    // filter devices according to output selected
4144    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4145
4146    audio_devices_t prevDevice = outputDesc->mDevice;
4147
4148    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4149
4150    if (device != AUDIO_DEVICE_NONE) {
4151        outputDesc->mDevice = device;
4152    }
4153    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4154
4155    // Do not change the routing if:
4156    //  - the requested device is AUDIO_DEVICE_NONE
4157    //  - the requested device is the same as current device and force is not specified.
4158    // Doing this check here allows the caller to call setOutputDevice() without conditions
4159    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
4160        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
4161        return muteWaitMs;
4162    }
4163
4164    ALOGV("setOutputDevice() changing device");
4165
4166    // do the routing
4167    if (device == AUDIO_DEVICE_NONE) {
4168        resetOutputDevice(output, delayMs, NULL);
4169    } else {
4170        DeviceVector deviceList = (address == NULL) ?
4171                mAvailableOutputDevices.getDevicesFromType(device)
4172                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4173        if (!deviceList.isEmpty()) {
4174            struct audio_patch patch;
4175            outputDesc->toAudioPortConfig(&patch.sources[0]);
4176            patch.num_sources = 1;
4177            patch.num_sinks = 0;
4178            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4179                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4180                patch.num_sinks++;
4181            }
4182            ssize_t index;
4183            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4184                index = mAudioPatches.indexOfKey(*patchHandle);
4185            } else {
4186                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4187            }
4188            sp< AudioPatch> patchDesc;
4189            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4190            if (index >= 0) {
4191                patchDesc = mAudioPatches.valueAt(index);
4192                afPatchHandle = patchDesc->mAfPatchHandle;
4193            }
4194
4195            status_t status = mpClientInterface->createAudioPatch(&patch,
4196                                                                   &afPatchHandle,
4197                                                                   delayMs);
4198            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4199                    "num_sources %d num_sinks %d",
4200                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4201            if (status == NO_ERROR) {
4202                if (index < 0) {
4203                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4204                                               &patch, mUidCached);
4205                    addAudioPatch(patchDesc->mHandle, patchDesc);
4206                } else {
4207                    patchDesc->mPatch = patch;
4208                }
4209                patchDesc->mAfPatchHandle = afPatchHandle;
4210                patchDesc->mUid = mUidCached;
4211                if (patchHandle) {
4212                    *patchHandle = patchDesc->mHandle;
4213                }
4214                outputDesc->mPatchHandle = patchDesc->mHandle;
4215                nextAudioPortGeneration();
4216                mpClientInterface->onAudioPatchListUpdate();
4217            }
4218        }
4219    }
4220
4221    // update stream volumes according to new device
4222    applyStreamVolumes(output, device, delayMs);
4223
4224    return muteWaitMs;
4225}
4226
4227status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4228                                               int delayMs,
4229                                               audio_patch_handle_t *patchHandle)
4230{
4231    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4232    ssize_t index;
4233    if (patchHandle) {
4234        index = mAudioPatches.indexOfKey(*patchHandle);
4235    } else {
4236        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4237    }
4238    if (index < 0) {
4239        return INVALID_OPERATION;
4240    }
4241    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4242    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4243    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4244    outputDesc->mPatchHandle = 0;
4245    removeAudioPatch(patchDesc->mHandle);
4246    nextAudioPortGeneration();
4247    mpClientInterface->onAudioPatchListUpdate();
4248    return status;
4249}
4250
4251status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4252                                            audio_devices_t device,
4253                                            bool force,
4254                                            audio_patch_handle_t *patchHandle)
4255{
4256    status_t status = NO_ERROR;
4257
4258    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4259    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4260        inputDesc->mDevice = device;
4261
4262        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4263        if (!deviceList.isEmpty()) {
4264            struct audio_patch patch;
4265            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4266            // AUDIO_SOURCE_HOTWORD is for internal use only:
4267            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4268            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4269                    !inputDesc->mIsSoundTrigger) {
4270                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4271            }
4272            patch.num_sinks = 1;
4273            //only one input device for now
4274            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4275            patch.num_sources = 1;
4276            ssize_t index;
4277            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4278                index = mAudioPatches.indexOfKey(*patchHandle);
4279            } else {
4280                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4281            }
4282            sp< AudioPatch> patchDesc;
4283            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4284            if (index >= 0) {
4285                patchDesc = mAudioPatches.valueAt(index);
4286                afPatchHandle = patchDesc->mAfPatchHandle;
4287            }
4288
4289            status_t status = mpClientInterface->createAudioPatch(&patch,
4290                                                                  &afPatchHandle,
4291                                                                  0);
4292            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4293                                                                          status, afPatchHandle);
4294            if (status == NO_ERROR) {
4295                if (index < 0) {
4296                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4297                                               &patch, mUidCached);
4298                    addAudioPatch(patchDesc->mHandle, patchDesc);
4299                } else {
4300                    patchDesc->mPatch = patch;
4301                }
4302                patchDesc->mAfPatchHandle = afPatchHandle;
4303                patchDesc->mUid = mUidCached;
4304                if (patchHandle) {
4305                    *patchHandle = patchDesc->mHandle;
4306                }
4307                inputDesc->mPatchHandle = patchDesc->mHandle;
4308                nextAudioPortGeneration();
4309                mpClientInterface->onAudioPatchListUpdate();
4310            }
4311        }
4312    }
4313    return status;
4314}
4315
4316status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4317                                              audio_patch_handle_t *patchHandle)
4318{
4319    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4320    ssize_t index;
4321    if (patchHandle) {
4322        index = mAudioPatches.indexOfKey(*patchHandle);
4323    } else {
4324        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4325    }
4326    if (index < 0) {
4327        return INVALID_OPERATION;
4328    }
4329    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4330    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4331    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4332    inputDesc->mPatchHandle = 0;
4333    removeAudioPatch(patchDesc->mHandle);
4334    nextAudioPortGeneration();
4335    mpClientInterface->onAudioPatchListUpdate();
4336    return status;
4337}
4338
4339sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4340                                                   uint32_t& samplingRate,
4341                                                   audio_format_t format,
4342                                                   audio_channel_mask_t channelMask,
4343                                                   audio_input_flags_t flags)
4344{
4345    // Choose an input profile based on the requested capture parameters: select the first available
4346    // profile supporting all requested parameters.
4347
4348    for (size_t i = 0; i < mHwModules.size(); i++)
4349    {
4350        if (mHwModules[i]->mHandle == 0) {
4351            continue;
4352        }
4353        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4354        {
4355            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4356            // profile->log();
4357            if (profile->isCompatibleProfile(device, samplingRate,
4358                                             &samplingRate /*updatedSamplingRate*/,
4359                                             format, channelMask, (audio_output_flags_t) flags)) {
4360                return profile;
4361            }
4362        }
4363    }
4364    return NULL;
4365}
4366
4367audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4368{
4369    uint32_t device = AUDIO_DEVICE_NONE;
4370    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4371                                            ~AUDIO_DEVICE_BIT_IN;
4372    switch (inputSource) {
4373    case AUDIO_SOURCE_VOICE_UPLINK:
4374      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4375          device = AUDIO_DEVICE_IN_VOICE_CALL;
4376          break;
4377      }
4378      break;
4379
4380    case AUDIO_SOURCE_DEFAULT:
4381    case AUDIO_SOURCE_MIC:
4382    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4383        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4384    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4385        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4386    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4387        device = AUDIO_DEVICE_IN_USB_DEVICE;
4388    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4389        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4390    }
4391    break;
4392
4393    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4394        // Allow only use of devices on primary input if in call and HAL does not support routing
4395        // to voice call path.
4396        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4397                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4398            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4399        }
4400
4401        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4402        case AUDIO_POLICY_FORCE_BT_SCO:
4403            // if SCO device is requested but no SCO device is available, fall back to default case
4404            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4405                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4406                break;
4407            }
4408            // FALL THROUGH
4409
4410        default:    // FORCE_NONE
4411            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4412                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4413            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4414                device = AUDIO_DEVICE_IN_USB_DEVICE;
4415            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4416                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4417            }
4418            break;
4419
4420        case AUDIO_POLICY_FORCE_SPEAKER:
4421            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4422                device = AUDIO_DEVICE_IN_BACK_MIC;
4423            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4424                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4425            }
4426            break;
4427        }
4428        break;
4429
4430    case AUDIO_SOURCE_VOICE_RECOGNITION:
4431    case AUDIO_SOURCE_HOTWORD:
4432        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4433                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4434            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4435        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4436            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4437        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4438            device = AUDIO_DEVICE_IN_USB_DEVICE;
4439        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4440            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4441        }
4442        break;
4443    case AUDIO_SOURCE_CAMCORDER:
4444        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4445            device = AUDIO_DEVICE_IN_BACK_MIC;
4446        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4447            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4448        }
4449        break;
4450    case AUDIO_SOURCE_VOICE_DOWNLINK:
4451    case AUDIO_SOURCE_VOICE_CALL:
4452        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4453            device = AUDIO_DEVICE_IN_VOICE_CALL;
4454        }
4455        break;
4456    case AUDIO_SOURCE_REMOTE_SUBMIX:
4457        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4458            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4459        }
4460        break;
4461    default:
4462        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4463        break;
4464    }
4465    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4466    return device;
4467}
4468
4469bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4470{
4471    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4472        device &= ~AUDIO_DEVICE_BIT_IN;
4473        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4474            return true;
4475    }
4476    return false;
4477}
4478
4479bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4480    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4481}
4482
4483audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4484{
4485    for (size_t i = 0; i < mInputs.size(); i++) {
4486        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4487        if ((input_descriptor->mRefCount > 0)
4488                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4489            return mInputs.keyAt(i);
4490        }
4491    }
4492    return 0;
4493}
4494
4495uint32_t AudioPolicyManager::activeInputsCount() const
4496{
4497    uint32_t count = 0;
4498    for (size_t i = 0; i < mInputs.size(); i++) {
4499        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4500        if (desc->mRefCount > 0) {
4501            return count++;
4502        }
4503    }
4504    return count;
4505}
4506
4507
4508audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4509{
4510    if (device == AUDIO_DEVICE_NONE) {
4511        // this happens when forcing a route update and no track is active on an output.
4512        // In this case the returned category is not important.
4513        device =  AUDIO_DEVICE_OUT_SPEAKER;
4514    } else if (popcount(device) > 1) {
4515        // Multiple device selection is either:
4516        //  - speaker + one other device: give priority to speaker in this case.
4517        //  - one A2DP device + another device: happens with duplicated output. In this case
4518        // retain the device on the A2DP output as the other must not correspond to an active
4519        // selection if not the speaker.
4520        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4521            device = AUDIO_DEVICE_OUT_SPEAKER;
4522        } else {
4523            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4524        }
4525    }
4526
4527    ALOGW_IF(popcount(device) != 1,
4528            "getDeviceForVolume() invalid device combination: %08x",
4529            device);
4530
4531    return device;
4532}
4533
4534AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4535{
4536    switch(getDeviceForVolume(device)) {
4537        case AUDIO_DEVICE_OUT_EARPIECE:
4538            return DEVICE_CATEGORY_EARPIECE;
4539        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4540        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4541        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4542        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4543        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4544        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4545            return DEVICE_CATEGORY_HEADSET;
4546        case AUDIO_DEVICE_OUT_LINE:
4547        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4548        /*USB?  Remote submix?*/
4549            return DEVICE_CATEGORY_EXT_MEDIA;
4550        case AUDIO_DEVICE_OUT_SPEAKER:
4551        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4552        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4553        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4554        case AUDIO_DEVICE_OUT_USB_DEVICE:
4555        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4556        default:
4557            return DEVICE_CATEGORY_SPEAKER;
4558    }
4559}
4560
4561float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4562        int indexInUi)
4563{
4564    device_category deviceCategory = getDeviceCategory(device);
4565    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4566
4567    // the volume index in the UI is relative to the min and max volume indices for this stream type
4568    int nbSteps = 1 + curve[VOLMAX].mIndex -
4569            curve[VOLMIN].mIndex;
4570    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4571            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4572
4573    // find what part of the curve this index volume belongs to, or if it's out of bounds
4574    int segment = 0;
4575    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4576        return 0.0f;
4577    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4578        segment = 0;
4579    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4580        segment = 1;
4581    } else if (volIdx <= curve[VOLMAX].mIndex) {
4582        segment = 2;
4583    } else {                                                               // out of bounds
4584        return 1.0f;
4585    }
4586
4587    // linear interpolation in the attenuation table in dB
4588    float decibels = curve[segment].mDBAttenuation +
4589            ((float)(volIdx - curve[segment].mIndex)) *
4590                ( (curve[segment+1].mDBAttenuation -
4591                        curve[segment].mDBAttenuation) /
4592                    ((float)(curve[segment+1].mIndex -
4593                            curve[segment].mIndex)) );
4594
4595    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4596
4597    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4598            curve[segment].mIndex, volIdx,
4599            curve[segment+1].mIndex,
4600            curve[segment].mDBAttenuation,
4601            decibels,
4602            curve[segment+1].mDBAttenuation,
4603            amplification);
4604
4605    return amplification;
4606}
4607
4608const AudioPolicyManager::VolumeCurvePoint
4609    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4610    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4611};
4612
4613const AudioPolicyManager::VolumeCurvePoint
4614    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4615    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4616};
4617
4618const AudioPolicyManager::VolumeCurvePoint
4619    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4620    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
4621};
4622
4623const AudioPolicyManager::VolumeCurvePoint
4624    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4625    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4626};
4627
4628const AudioPolicyManager::VolumeCurvePoint
4629    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4630    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4631};
4632
4633const AudioPolicyManager::VolumeCurvePoint
4634    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4635    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4636};
4637
4638const AudioPolicyManager::VolumeCurvePoint
4639    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4640    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4641};
4642
4643// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4644// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4645// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4646// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4647
4648const AudioPolicyManager::VolumeCurvePoint
4649    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4650    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4651};
4652
4653const AudioPolicyManager::VolumeCurvePoint
4654    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4655    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4656};
4657
4658const AudioPolicyManager::VolumeCurvePoint
4659    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4660    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4661};
4662
4663const AudioPolicyManager::VolumeCurvePoint
4664    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4665    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4666};
4667
4668const AudioPolicyManager::VolumeCurvePoint
4669    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4670    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4671};
4672
4673const AudioPolicyManager::VolumeCurvePoint
4674            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4675                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4676    { // AUDIO_STREAM_VOICE_CALL
4677        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4678        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4679        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4680        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4681    },
4682    { // AUDIO_STREAM_SYSTEM
4683        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4684        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4685        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4686        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4687    },
4688    { // AUDIO_STREAM_RING
4689        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4690        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4691        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4692        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4693    },
4694    { // AUDIO_STREAM_MUSIC
4695        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4696        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4697        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4698        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4699    },
4700    { // AUDIO_STREAM_ALARM
4701        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4702        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4703        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4704        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4705    },
4706    { // AUDIO_STREAM_NOTIFICATION
4707        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4708        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4709        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4710        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4711    },
4712    { // AUDIO_STREAM_BLUETOOTH_SCO
4713        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4714        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4715        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4716        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4717    },
4718    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4719        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4720        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4721        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4722        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4723    },
4724    {  // AUDIO_STREAM_DTMF
4725        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4726        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4727        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4728        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4729    },
4730    { // AUDIO_STREAM_TTS
4731        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4732        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4733        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4734        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4735    },
4736};
4737
4738void AudioPolicyManager::initializeVolumeCurves()
4739{
4740    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4741        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4742            mStreams[i].mVolumeCurve[j] =
4743                    sVolumeProfiles[i][j];
4744        }
4745    }
4746
4747    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4748    if (mSpeakerDrcEnabled) {
4749        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4750                sDefaultSystemVolumeCurveDrc;
4751        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4752                sSpeakerSonificationVolumeCurveDrc;
4753        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4754                sSpeakerSonificationVolumeCurveDrc;
4755        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4756                sSpeakerSonificationVolumeCurveDrc;
4757        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4758                sSpeakerMediaVolumeCurveDrc;
4759    }
4760}
4761
4762float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4763                                            int index,
4764                                            audio_io_handle_t output,
4765                                            audio_devices_t device)
4766{
4767    float volume = 1.0;
4768    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4769    StreamDescriptor &streamDesc = mStreams[stream];
4770
4771    if (device == AUDIO_DEVICE_NONE) {
4772        device = outputDesc->device();
4773    }
4774
4775    volume = volIndexToAmpl(device, streamDesc, index);
4776
4777    // if a headset is connected, apply the following rules to ring tones and notifications
4778    // to avoid sound level bursts in user's ears:
4779    // - always attenuate ring tones and notifications volume by 6dB
4780    // - if music is playing, always limit the volume to current music volume,
4781    // with a minimum threshold at -36dB so that notification is always perceived.
4782    const routing_strategy stream_strategy = getStrategy(stream);
4783    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4784            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4785            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4786            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4787        ((stream_strategy == STRATEGY_SONIFICATION)
4788                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4789                || (stream == AUDIO_STREAM_SYSTEM)
4790                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4791                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4792        streamDesc.mCanBeMuted) {
4793        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4794        // when the phone is ringing we must consider that music could have been paused just before
4795        // by the music application and behave as if music was active if the last music track was
4796        // just stopped
4797        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4798                mLimitRingtoneVolume) {
4799            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4800            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4801                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4802                               output,
4803                               musicDevice);
4804            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4805                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4806            if (volume > minVol) {
4807                volume = minVol;
4808                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4809            }
4810        }
4811    }
4812
4813    return volume;
4814}
4815
4816status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4817                                                   int index,
4818                                                   audio_io_handle_t output,
4819                                                   audio_devices_t device,
4820                                                   int delayMs,
4821                                                   bool force)
4822{
4823
4824    // do not change actual stream volume if the stream is muted
4825    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4826        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4827              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4828        return NO_ERROR;
4829    }
4830
4831    // do not change in call volume if bluetooth is connected and vice versa
4832    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4833            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4834        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4835                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4836        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4837             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4838        return INVALID_OPERATION;
4839    }
4840
4841    float volume = computeVolume(stream, index, output, device);
4842    // We actually change the volume if:
4843    // - the float value returned by computeVolume() changed
4844    // - the force flag is set
4845    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4846            force) {
4847        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4848        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4849        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4850        // enabled
4851        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4852            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4853        }
4854        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4855    }
4856
4857    if (stream == AUDIO_STREAM_VOICE_CALL ||
4858        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4859        float voiceVolume;
4860        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4861        if (stream == AUDIO_STREAM_VOICE_CALL) {
4862            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4863        } else {
4864            voiceVolume = 1.0;
4865        }
4866
4867        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4868            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4869            mLastVoiceVolume = voiceVolume;
4870        }
4871    }
4872
4873    return NO_ERROR;
4874}
4875
4876void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4877                                                audio_devices_t device,
4878                                                int delayMs,
4879                                                bool force)
4880{
4881    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4882
4883    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4884        checkAndSetVolume((audio_stream_type_t)stream,
4885                          mStreams[stream].getVolumeIndex(device),
4886                          output,
4887                          device,
4888                          delayMs,
4889                          force);
4890    }
4891}
4892
4893void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4894                                             bool on,
4895                                             audio_io_handle_t output,
4896                                             int delayMs,
4897                                             audio_devices_t device)
4898{
4899    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
4900    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4901        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4902            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
4903        }
4904    }
4905}
4906
4907void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4908                                           bool on,
4909                                           audio_io_handle_t output,
4910                                           int delayMs,
4911                                           audio_devices_t device)
4912{
4913    StreamDescriptor &streamDesc = mStreams[stream];
4914    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4915    if (device == AUDIO_DEVICE_NONE) {
4916        device = outputDesc->device();
4917    }
4918
4919    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
4920          stream, on, output, outputDesc->mMuteCount[stream], device);
4921
4922    if (on) {
4923        if (outputDesc->mMuteCount[stream] == 0) {
4924            if (streamDesc.mCanBeMuted &&
4925                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4926                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
4927                checkAndSetVolume(stream, 0, output, device, delayMs);
4928            }
4929        }
4930        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
4931        outputDesc->mMuteCount[stream]++;
4932    } else {
4933        if (outputDesc->mMuteCount[stream] == 0) {
4934            ALOGV("setStreamMute() unmuting non muted stream!");
4935            return;
4936        }
4937        if (--outputDesc->mMuteCount[stream] == 0) {
4938            checkAndSetVolume(stream,
4939                              streamDesc.getVolumeIndex(device),
4940                              output,
4941                              device,
4942                              delayMs);
4943        }
4944    }
4945}
4946
4947void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
4948                                                      bool starting, bool stateChange)
4949{
4950    // if the stream pertains to sonification strategy and we are in call we must
4951    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
4952    // in the device used for phone strategy and play the tone if the selected device does not
4953    // interfere with the device used for phone strategy
4954    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
4955    // many times as there are active tracks on the output
4956    const routing_strategy stream_strategy = getStrategy(stream);
4957    if ((stream_strategy == STRATEGY_SONIFICATION) ||
4958            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
4959        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
4960        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
4961                stream, starting, outputDesc->mDevice, stateChange);
4962        if (outputDesc->mRefCount[stream]) {
4963            int muteCount = 1;
4964            if (stateChange) {
4965                muteCount = outputDesc->mRefCount[stream];
4966            }
4967            if (audio_is_low_visibility(stream)) {
4968                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
4969                for (int i = 0; i < muteCount; i++) {
4970                    setStreamMute(stream, starting, mPrimaryOutput);
4971                }
4972            } else {
4973                ALOGV("handleIncallSonification() high visibility");
4974                if (outputDesc->device() &
4975                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
4976                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
4977                    for (int i = 0; i < muteCount; i++) {
4978                        setStreamMute(stream, starting, mPrimaryOutput);
4979                    }
4980                }
4981                if (starting) {
4982                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
4983                                                 AUDIO_STREAM_VOICE_CALL);
4984                } else {
4985                    mpClientInterface->stopTone();
4986                }
4987            }
4988        }
4989    }
4990}
4991
4992bool AudioPolicyManager::isInCall()
4993{
4994    return isStateInCall(mPhoneState);
4995}
4996
4997bool AudioPolicyManager::isStateInCall(int state) {
4998    return ((state == AUDIO_MODE_IN_CALL) ||
4999            (state == AUDIO_MODE_IN_COMMUNICATION));
5000}
5001
5002uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5003{
5004    return MAX_EFFECTS_CPU_LOAD;
5005}
5006
5007uint32_t AudioPolicyManager::getMaxEffectsMemory()
5008{
5009    return MAX_EFFECTS_MEMORY;
5010}
5011
5012
5013// --- AudioOutputDescriptor class implementation
5014
5015AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5016        const sp<IOProfile>& profile)
5017    : mId(0), mIoHandle(0), mLatency(0),
5018    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5019    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5020{
5021    // clear usage count for all stream types
5022    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5023        mRefCount[i] = 0;
5024        mCurVolume[i] = -1.0;
5025        mMuteCount[i] = 0;
5026        mStopTime[i] = 0;
5027    }
5028    for (int i = 0; i < NUM_STRATEGIES; i++) {
5029        mStrategyMutedByDevice[i] = false;
5030    }
5031    if (profile != NULL) {
5032        mAudioPort = profile;
5033        mFlags = profile->mFlags;
5034        mSamplingRate = profile->pickSamplingRate();
5035        mFormat = profile->pickFormat();
5036        mChannelMask = profile->pickChannelMask();
5037        if (profile->mGains.size() > 0) {
5038            profile->mGains[0]->getDefaultConfig(&mGain);
5039        }
5040    }
5041}
5042
5043audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5044{
5045    if (isDuplicated()) {
5046        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5047    } else {
5048        return mDevice;
5049    }
5050}
5051
5052uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5053{
5054    if (isDuplicated()) {
5055        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5056    } else {
5057        return mLatency;
5058    }
5059}
5060
5061bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5062        const sp<AudioOutputDescriptor> outputDesc)
5063{
5064    if (isDuplicated()) {
5065        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5066    } else if (outputDesc->isDuplicated()){
5067        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5068    } else {
5069        return (mProfile->mModule == outputDesc->mProfile->mModule);
5070    }
5071}
5072
5073void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5074                                                                   int delta)
5075{
5076    // forward usage count change to attached outputs
5077    if (isDuplicated()) {
5078        mOutput1->changeRefCount(stream, delta);
5079        mOutput2->changeRefCount(stream, delta);
5080    }
5081    if ((delta + (int)mRefCount[stream]) < 0) {
5082        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5083              delta, stream, mRefCount[stream]);
5084        mRefCount[stream] = 0;
5085        return;
5086    }
5087    mRefCount[stream] += delta;
5088    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5089}
5090
5091audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5092{
5093    if (isDuplicated()) {
5094        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5095    } else {
5096        return mProfile->mSupportedDevices.types() ;
5097    }
5098}
5099
5100bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5101{
5102    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5103}
5104
5105bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5106                                                                       uint32_t inPastMs,
5107                                                                       nsecs_t sysTime) const
5108{
5109    if ((sysTime == 0) && (inPastMs != 0)) {
5110        sysTime = systemTime();
5111    }
5112    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5113        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5114                (NUM_STRATEGIES == strategy)) &&
5115                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5116            return true;
5117        }
5118    }
5119    return false;
5120}
5121
5122bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5123                                                                       uint32_t inPastMs,
5124                                                                       nsecs_t sysTime) const
5125{
5126    if (mRefCount[stream] != 0) {
5127        return true;
5128    }
5129    if (inPastMs == 0) {
5130        return false;
5131    }
5132    if (sysTime == 0) {
5133        sysTime = systemTime();
5134    }
5135    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5136        return true;
5137    }
5138    return false;
5139}
5140
5141void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5142                                                 struct audio_port_config *dstConfig,
5143                                                 const struct audio_port_config *srcConfig) const
5144{
5145    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5146
5147    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5148                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5149    if (srcConfig != NULL) {
5150        dstConfig->config_mask |= srcConfig->config_mask;
5151    }
5152    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5153
5154    dstConfig->id = mId;
5155    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5156    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5157    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5158    dstConfig->ext.mix.handle = mIoHandle;
5159    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5160}
5161
5162void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5163                                                    struct audio_port *port) const
5164{
5165    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5166    mProfile->toAudioPort(port);
5167    port->id = mId;
5168    toAudioPortConfig(&port->active_config);
5169    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5170    port->ext.mix.handle = mIoHandle;
5171    port->ext.mix.latency_class =
5172            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5173}
5174
5175status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5176{
5177    const size_t SIZE = 256;
5178    char buffer[SIZE];
5179    String8 result;
5180
5181    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5182    result.append(buffer);
5183    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5184    result.append(buffer);
5185    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5186    result.append(buffer);
5187    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5188    result.append(buffer);
5189    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5190    result.append(buffer);
5191    snprintf(buffer, SIZE, " Devices %08x\n", device());
5192    result.append(buffer);
5193    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5194    result.append(buffer);
5195    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5196        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5197                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5198        result.append(buffer);
5199    }
5200    write(fd, result.string(), result.size());
5201
5202    return NO_ERROR;
5203}
5204
5205// --- AudioInputDescriptor class implementation
5206
5207AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5208    : mId(0), mIoHandle(0),
5209      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5210      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5211{
5212    if (profile != NULL) {
5213        mAudioPort = profile;
5214        mSamplingRate = profile->pickSamplingRate();
5215        mFormat = profile->pickFormat();
5216        mChannelMask = profile->pickChannelMask();
5217        if (profile->mGains.size() > 0) {
5218            profile->mGains[0]->getDefaultConfig(&mGain);
5219        }
5220    }
5221}
5222
5223void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5224                                                   struct audio_port_config *dstConfig,
5225                                                   const struct audio_port_config *srcConfig) const
5226{
5227    ALOG_ASSERT(mProfile != 0,
5228                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5229    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5230                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5231    if (srcConfig != NULL) {
5232        dstConfig->config_mask |= srcConfig->config_mask;
5233    }
5234
5235    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5236
5237    dstConfig->id = mId;
5238    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5239    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5240    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5241    dstConfig->ext.mix.handle = mIoHandle;
5242    dstConfig->ext.mix.usecase.source = mInputSource;
5243}
5244
5245void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5246                                                    struct audio_port *port) const
5247{
5248    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5249
5250    mProfile->toAudioPort(port);
5251    port->id = mId;
5252    toAudioPortConfig(&port->active_config);
5253    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5254    port->ext.mix.handle = mIoHandle;
5255    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5256}
5257
5258status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5259{
5260    const size_t SIZE = 256;
5261    char buffer[SIZE];
5262    String8 result;
5263
5264    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5265    result.append(buffer);
5266    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5267    result.append(buffer);
5268    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5269    result.append(buffer);
5270    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5271    result.append(buffer);
5272    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5273    result.append(buffer);
5274    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5275    result.append(buffer);
5276
5277    write(fd, result.string(), result.size());
5278
5279    return NO_ERROR;
5280}
5281
5282// --- StreamDescriptor class implementation
5283
5284AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5285    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5286{
5287    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5288}
5289
5290int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5291{
5292    device = AudioPolicyManager::getDeviceForVolume(device);
5293    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5294    if (mIndexCur.indexOfKey(device) < 0) {
5295        device = AUDIO_DEVICE_OUT_DEFAULT;
5296    }
5297    return mIndexCur.valueFor(device);
5298}
5299
5300void AudioPolicyManager::StreamDescriptor::dump(int fd)
5301{
5302    const size_t SIZE = 256;
5303    char buffer[SIZE];
5304    String8 result;
5305
5306    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5307             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5308    result.append(buffer);
5309    for (size_t i = 0; i < mIndexCur.size(); i++) {
5310        snprintf(buffer, SIZE, "%04x : %02d, ",
5311                 mIndexCur.keyAt(i),
5312                 mIndexCur.valueAt(i));
5313        result.append(buffer);
5314    }
5315    result.append("\n");
5316
5317    write(fd, result.string(), result.size());
5318}
5319
5320// --- EffectDescriptor class implementation
5321
5322status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5323{
5324    const size_t SIZE = 256;
5325    char buffer[SIZE];
5326    String8 result;
5327
5328    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5329    result.append(buffer);
5330    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5331    result.append(buffer);
5332    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5333    result.append(buffer);
5334    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5335    result.append(buffer);
5336    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5337    result.append(buffer);
5338    write(fd, result.string(), result.size());
5339
5340    return NO_ERROR;
5341}
5342
5343// --- HwModule class implementation
5344
5345AudioPolicyManager::HwModule::HwModule(const char *name)
5346    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5347      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5348{
5349}
5350
5351AudioPolicyManager::HwModule::~HwModule()
5352{
5353    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5354        mOutputProfiles[i]->mSupportedDevices.clear();
5355    }
5356    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5357        mInputProfiles[i]->mSupportedDevices.clear();
5358    }
5359    free((void *)mName);
5360}
5361
5362status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5363{
5364    cnode *node = root->first_child;
5365
5366    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5367
5368    while (node) {
5369        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5370            profile->loadSamplingRates((char *)node->value);
5371        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5372            profile->loadFormats((char *)node->value);
5373        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5374            profile->loadInChannels((char *)node->value);
5375        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5376            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5377                                                           mDeclaredDevices);
5378        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5379            profile->loadGains(node);
5380        }
5381        node = node->next;
5382    }
5383    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5384            "loadInput() invalid supported devices");
5385    ALOGW_IF(profile->mChannelMasks.size() == 0,
5386            "loadInput() invalid supported channel masks");
5387    ALOGW_IF(profile->mSamplingRates.size() == 0,
5388            "loadInput() invalid supported sampling rates");
5389    ALOGW_IF(profile->mFormats.size() == 0,
5390            "loadInput() invalid supported formats");
5391    if (!profile->mSupportedDevices.isEmpty() &&
5392            (profile->mChannelMasks.size() != 0) &&
5393            (profile->mSamplingRates.size() != 0) &&
5394            (profile->mFormats.size() != 0)) {
5395
5396        ALOGV("loadInput() adding input Supported Devices %04x",
5397              profile->mSupportedDevices.types());
5398
5399        mInputProfiles.add(profile);
5400        return NO_ERROR;
5401    } else {
5402        return BAD_VALUE;
5403    }
5404}
5405
5406status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5407{
5408    cnode *node = root->first_child;
5409
5410    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5411
5412    while (node) {
5413        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5414            profile->loadSamplingRates((char *)node->value);
5415        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5416            profile->loadFormats((char *)node->value);
5417        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5418            profile->loadOutChannels((char *)node->value);
5419        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5420            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5421                                                           mDeclaredDevices);
5422        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5423            profile->mFlags = parseFlagNames((char *)node->value);
5424        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5425            profile->loadGains(node);
5426        }
5427        node = node->next;
5428    }
5429    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5430            "loadOutput() invalid supported devices");
5431    ALOGW_IF(profile->mChannelMasks.size() == 0,
5432            "loadOutput() invalid supported channel masks");
5433    ALOGW_IF(profile->mSamplingRates.size() == 0,
5434            "loadOutput() invalid supported sampling rates");
5435    ALOGW_IF(profile->mFormats.size() == 0,
5436            "loadOutput() invalid supported formats");
5437    if (!profile->mSupportedDevices.isEmpty() &&
5438            (profile->mChannelMasks.size() != 0) &&
5439            (profile->mSamplingRates.size() != 0) &&
5440            (profile->mFormats.size() != 0)) {
5441
5442        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5443              profile->mSupportedDevices.types(), profile->mFlags);
5444
5445        mOutputProfiles.add(profile);
5446        return NO_ERROR;
5447    } else {
5448        return BAD_VALUE;
5449    }
5450}
5451
5452status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5453{
5454    cnode *node = root->first_child;
5455
5456    audio_devices_t type = AUDIO_DEVICE_NONE;
5457    while (node) {
5458        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5459            type = parseDeviceNames((char *)node->value);
5460            break;
5461        }
5462        node = node->next;
5463    }
5464    if (type == AUDIO_DEVICE_NONE ||
5465            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5466        ALOGW("loadDevice() bad type %08x", type);
5467        return BAD_VALUE;
5468    }
5469    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5470    deviceDesc->mModule = this;
5471
5472    node = root->first_child;
5473    while (node) {
5474        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5475            deviceDesc->mAddress = String8((char *)node->value);
5476        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5477            if (audio_is_input_device(type)) {
5478                deviceDesc->loadInChannels((char *)node->value);
5479            } else {
5480                deviceDesc->loadOutChannels((char *)node->value);
5481            }
5482        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5483            deviceDesc->loadGains(node);
5484        }
5485        node = node->next;
5486    }
5487
5488    ALOGV("loadDevice() adding device name %s type %08x address %s",
5489          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5490
5491    mDeclaredDevices.add(deviceDesc);
5492
5493    return NO_ERROR;
5494}
5495
5496void AudioPolicyManager::HwModule::dump(int fd)
5497{
5498    const size_t SIZE = 256;
5499    char buffer[SIZE];
5500    String8 result;
5501
5502    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5503    result.append(buffer);
5504    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5505    result.append(buffer);
5506    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5507    result.append(buffer);
5508    write(fd, result.string(), result.size());
5509    if (mOutputProfiles.size()) {
5510        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5511        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5512            snprintf(buffer, SIZE, "    output %zu:\n", i);
5513            write(fd, buffer, strlen(buffer));
5514            mOutputProfiles[i]->dump(fd);
5515        }
5516    }
5517    if (mInputProfiles.size()) {
5518        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5519        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5520            snprintf(buffer, SIZE, "    input %zu:\n", i);
5521            write(fd, buffer, strlen(buffer));
5522            mInputProfiles[i]->dump(fd);
5523        }
5524    }
5525    if (mDeclaredDevices.size()) {
5526        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5527        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5528            mDeclaredDevices[i]->dump(fd, 4, i);
5529        }
5530    }
5531}
5532
5533// --- AudioPort class implementation
5534
5535
5536AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5537          audio_port_role_t role, const sp<HwModule>& module) :
5538    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5539{
5540    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5541                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5542}
5543
5544void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5545{
5546    port->role = mRole;
5547    port->type = mType;
5548    unsigned int i;
5549    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5550        if (mSamplingRates[i] != 0) {
5551            port->sample_rates[i] = mSamplingRates[i];
5552        }
5553    }
5554    port->num_sample_rates = i;
5555    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5556        if (mChannelMasks[i] != 0) {
5557            port->channel_masks[i] = mChannelMasks[i];
5558        }
5559    }
5560    port->num_channel_masks = i;
5561    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5562        if (mFormats[i] != 0) {
5563            port->formats[i] = mFormats[i];
5564        }
5565    }
5566    port->num_formats = i;
5567
5568    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5569
5570    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5571        port->gains[i] = mGains[i]->mGain;
5572    }
5573    port->num_gains = i;
5574}
5575
5576void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
5577    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
5578        const uint32_t rate = port->mSamplingRates.itemAt(k);
5579        if (rate != 0) { // skip "dynamic" rates
5580            bool hasRate = false;
5581            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
5582                if (rate == mSamplingRates.itemAt(l)) {
5583                    hasRate = true;
5584                    break;
5585                }
5586            }
5587            if (!hasRate) { // never import a sampling rate twice
5588                mSamplingRates.add(rate);
5589            }
5590        }
5591    }
5592    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
5593        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
5594        if (mask != 0) { // skip "dynamic" masks
5595            bool hasMask = false;
5596            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
5597                if (mask == mChannelMasks.itemAt(l)) {
5598                    hasMask = true;
5599                    break;
5600                }
5601            }
5602            if (!hasMask) { // never import a channel mask twice
5603                mChannelMasks.add(mask);
5604            }
5605        }
5606    }
5607    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
5608        const audio_format_t format = port->mFormats.itemAt(k);
5609        if (format != 0) { // skip "dynamic" formats
5610            bool hasFormat = false;
5611            for (size_t l = 0 ; l < mFormats.size() ; l++) {
5612                if (format == mFormats.itemAt(l)) {
5613                    hasFormat = true;
5614                    break;
5615                }
5616            }
5617            if (!hasFormat) { // never import a channel mask twice
5618                mFormats.add(format);
5619            }
5620        }
5621    }
5622}
5623
5624void AudioPolicyManager::AudioPort::clearCapabilities() {
5625    mChannelMasks.clear();
5626    mFormats.clear();
5627    mSamplingRates.clear();
5628}
5629
5630void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5631{
5632    char *str = strtok(name, "|");
5633
5634    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5635    // rates should be read from the output stream after it is opened for the first time
5636    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5637        mSamplingRates.add(0);
5638        return;
5639    }
5640
5641    while (str != NULL) {
5642        uint32_t rate = atoi(str);
5643        if (rate != 0) {
5644            ALOGV("loadSamplingRates() adding rate %d", rate);
5645            mSamplingRates.add(rate);
5646        }
5647        str = strtok(NULL, "|");
5648    }
5649}
5650
5651void AudioPolicyManager::AudioPort::loadFormats(char *name)
5652{
5653    char *str = strtok(name, "|");
5654
5655    // by convention, "0' in the first entry in mFormats indicates the supported formats
5656    // should be read from the output stream after it is opened for the first time
5657    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5658        mFormats.add(AUDIO_FORMAT_DEFAULT);
5659        return;
5660    }
5661
5662    while (str != NULL) {
5663        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5664                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5665                                                             str);
5666        if (format != AUDIO_FORMAT_DEFAULT) {
5667            mFormats.add(format);
5668        }
5669        str = strtok(NULL, "|");
5670    }
5671}
5672
5673void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5674{
5675    const char *str = strtok(name, "|");
5676
5677    ALOGV("loadInChannels() %s", name);
5678
5679    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5680        mChannelMasks.add(0);
5681        return;
5682    }
5683
5684    while (str != NULL) {
5685        audio_channel_mask_t channelMask =
5686                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5687                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5688                                                   str);
5689        if (channelMask != 0) {
5690            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5691            mChannelMasks.add(channelMask);
5692        }
5693        str = strtok(NULL, "|");
5694    }
5695}
5696
5697void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5698{
5699    const char *str = strtok(name, "|");
5700
5701    ALOGV("loadOutChannels() %s", name);
5702
5703    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5704    // masks should be read from the output stream after it is opened for the first time
5705    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5706        mChannelMasks.add(0);
5707        return;
5708    }
5709
5710    while (str != NULL) {
5711        audio_channel_mask_t channelMask =
5712                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5713                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5714                                                   str);
5715        if (channelMask != 0) {
5716            mChannelMasks.add(channelMask);
5717        }
5718        str = strtok(NULL, "|");
5719    }
5720    return;
5721}
5722
5723audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5724{
5725    const char *str = strtok(name, "|");
5726
5727    ALOGV("loadGainMode() %s", name);
5728    audio_gain_mode_t mode = 0;
5729    while (str != NULL) {
5730        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5731                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5732                                                str);
5733        str = strtok(NULL, "|");
5734    }
5735    return mode;
5736}
5737
5738void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5739{
5740    cnode *node = root->first_child;
5741
5742    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5743
5744    while (node) {
5745        if (strcmp(node->name, GAIN_MODE) == 0) {
5746            gain->mGain.mode = loadGainMode((char *)node->value);
5747        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5748            if (mUseInChannelMask) {
5749                gain->mGain.channel_mask =
5750                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5751                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5752                                                           (char *)node->value);
5753            } else {
5754                gain->mGain.channel_mask =
5755                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5756                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5757                                                           (char *)node->value);
5758            }
5759        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5760            gain->mGain.min_value = atoi((char *)node->value);
5761        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5762            gain->mGain.max_value = atoi((char *)node->value);
5763        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5764            gain->mGain.default_value = atoi((char *)node->value);
5765        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5766            gain->mGain.step_value = atoi((char *)node->value);
5767        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5768            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5769        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5770            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5771        }
5772        node = node->next;
5773    }
5774
5775    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5776          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5777
5778    if (gain->mGain.mode == 0) {
5779        return;
5780    }
5781    mGains.add(gain);
5782}
5783
5784void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5785{
5786    cnode *node = root->first_child;
5787    int index = 0;
5788    while (node) {
5789        ALOGV("loadGains() loading gain %s", node->name);
5790        loadGain(node, index++);
5791        node = node->next;
5792    }
5793}
5794
5795status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5796{
5797    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5798        if (mSamplingRates[i] == samplingRate) {
5799            return NO_ERROR;
5800        }
5801    }
5802    return BAD_VALUE;
5803}
5804
5805status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5806        uint32_t *updatedSamplingRate) const
5807{
5808    // Search for the closest supported sampling rate that is above (preferred)
5809    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5810    // The sampling rates do not need to be sorted in ascending order.
5811    ssize_t maxBelow = -1;
5812    ssize_t minAbove = -1;
5813    uint32_t candidate;
5814    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5815        candidate = mSamplingRates[i];
5816        if (candidate == samplingRate) {
5817            if (updatedSamplingRate != NULL) {
5818                *updatedSamplingRate = candidate;
5819            }
5820            return NO_ERROR;
5821        }
5822        // candidate < desired
5823        if (candidate < samplingRate) {
5824            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5825                maxBelow = i;
5826            }
5827        // candidate > desired
5828        } else {
5829            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5830                minAbove = i;
5831            }
5832        }
5833    }
5834    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5835    // TODO Move these assumptions out.
5836    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5837    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5838                                                    // due to approximation by an int32_t of the
5839                                                    // phase increments
5840    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5841    if (minAbove >= 0) {
5842        candidate = mSamplingRates[minAbove];
5843        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5844            if (updatedSamplingRate != NULL) {
5845                *updatedSamplingRate = candidate;
5846            }
5847            return NO_ERROR;
5848        }
5849    }
5850    // But if we have to up-sample from a lower sampling rate, that's OK.
5851    if (maxBelow >= 0) {
5852        candidate = mSamplingRates[maxBelow];
5853        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5854            if (updatedSamplingRate != NULL) {
5855                *updatedSamplingRate = candidate;
5856            }
5857            return NO_ERROR;
5858        }
5859    }
5860    // leave updatedSamplingRate unmodified
5861    return BAD_VALUE;
5862}
5863
5864status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5865{
5866    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5867        if (mChannelMasks[i] == channelMask) {
5868            return NO_ERROR;
5869        }
5870    }
5871    return BAD_VALUE;
5872}
5873
5874status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5875        const
5876{
5877    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5878    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5879        // FIXME Does not handle multi-channel automatic conversions yet
5880        audio_channel_mask_t supported = mChannelMasks[i];
5881        if (supported == channelMask) {
5882            return NO_ERROR;
5883        }
5884        if (isRecordThread) {
5885            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5886            // FIXME Abstract this out to a table.
5887            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5888                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5889                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5890                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5891                return NO_ERROR;
5892            }
5893        }
5894    }
5895    return BAD_VALUE;
5896}
5897
5898status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
5899{
5900    for (size_t i = 0; i < mFormats.size(); i ++) {
5901        if (mFormats[i] == format) {
5902            return NO_ERROR;
5903        }
5904    }
5905    return BAD_VALUE;
5906}
5907
5908
5909uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
5910{
5911    // special case for uninitialized dynamic profile
5912    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
5913        return 0;
5914    }
5915
5916    uint32_t samplingRate = 0;
5917    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
5918
5919    // For mixed output and inputs, use max mixer sampling rates. Do not
5920    // limit sampling rate otherwise
5921    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5922            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5923            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5924        maxRate = UINT_MAX;
5925    }
5926    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5927        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
5928            samplingRate = mSamplingRates[i];
5929        }
5930    }
5931    return samplingRate;
5932}
5933
5934audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
5935{
5936    // special case for uninitialized dynamic profile
5937    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
5938        return AUDIO_CHANNEL_NONE;
5939    }
5940
5941    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
5942    uint32_t channelCount = 0;
5943    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
5944
5945    // For mixed output and inputs, use max mixer channel count. Do not
5946    // limit channel count otherwise
5947    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5948            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5949            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5950        maxCount = UINT_MAX;
5951    }
5952    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5953        uint32_t cnlCount;
5954        if (mUseInChannelMask) {
5955            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
5956        } else {
5957            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
5958        }
5959        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
5960            channelMask = mChannelMasks[i];
5961        }
5962    }
5963    return channelMask;
5964}
5965
5966/* format in order of increasing preference */
5967const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
5968        AUDIO_FORMAT_DEFAULT,
5969        AUDIO_FORMAT_PCM_16_BIT,
5970        AUDIO_FORMAT_PCM_8_24_BIT,
5971        AUDIO_FORMAT_PCM_24_BIT_PACKED,
5972        AUDIO_FORMAT_PCM_32_BIT,
5973        AUDIO_FORMAT_PCM_FLOAT,
5974};
5975
5976int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
5977                                                  audio_format_t format2)
5978{
5979    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
5980    // compressed format and better than any PCM format. This is by design of pickFormat()
5981    if (!audio_is_linear_pcm(format1)) {
5982        if (!audio_is_linear_pcm(format2)) {
5983            return 0;
5984        }
5985        return 1;
5986    }
5987    if (!audio_is_linear_pcm(format2)) {
5988        return -1;
5989    }
5990
5991    int index1 = -1, index2 = -1;
5992    for (size_t i = 0;
5993            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
5994            i ++) {
5995        if (sPcmFormatCompareTable[i] == format1) {
5996            index1 = i;
5997        }
5998        if (sPcmFormatCompareTable[i] == format2) {
5999            index2 = i;
6000        }
6001    }
6002    // format1 not found => index1 < 0 => format2 > format1
6003    // format2 not found => index2 < 0 => format2 < format1
6004    return index1 - index2;
6005}
6006
6007audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6008{
6009    // special case for uninitialized dynamic profile
6010    if (mFormats.size() == 1 && mFormats[0] == 0) {
6011        return AUDIO_FORMAT_DEFAULT;
6012    }
6013
6014    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6015    audio_format_t bestFormat =
6016            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6017                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6018    // For mixed output and inputs, use best mixer output format. Do not
6019    // limit format otherwise
6020    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6021            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6022             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6023        bestFormat = AUDIO_FORMAT_INVALID;
6024    }
6025
6026    for (size_t i = 0; i < mFormats.size(); i ++) {
6027        if ((compareFormats(mFormats[i], format) > 0) &&
6028                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6029            format = mFormats[i];
6030        }
6031    }
6032    return format;
6033}
6034
6035status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6036                                                  int index) const
6037{
6038    if (index < 0 || (size_t)index >= mGains.size()) {
6039        return BAD_VALUE;
6040    }
6041    return mGains[index]->checkConfig(gainConfig);
6042}
6043
6044void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6045{
6046    const size_t SIZE = 256;
6047    char buffer[SIZE];
6048    String8 result;
6049
6050    if (mName.size() != 0) {
6051        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6052        result.append(buffer);
6053    }
6054
6055    if (mSamplingRates.size() != 0) {
6056        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6057        result.append(buffer);
6058        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6059            if (i == 0 && mSamplingRates[i] == 0) {
6060                snprintf(buffer, SIZE, "Dynamic");
6061            } else {
6062                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6063            }
6064            result.append(buffer);
6065            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6066        }
6067        result.append("\n");
6068    }
6069
6070    if (mChannelMasks.size() != 0) {
6071        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6072        result.append(buffer);
6073        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6074            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6075
6076            if (i == 0 && mChannelMasks[i] == 0) {
6077                snprintf(buffer, SIZE, "Dynamic");
6078            } else {
6079                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6080            }
6081            result.append(buffer);
6082            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6083        }
6084        result.append("\n");
6085    }
6086
6087    if (mFormats.size() != 0) {
6088        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6089        result.append(buffer);
6090        for (size_t i = 0; i < mFormats.size(); i++) {
6091            const char *formatStr = enumToString(sFormatNameToEnumTable,
6092                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6093                                                 mFormats[i]);
6094            if (i == 0 && strcmp(formatStr, "") == 0) {
6095                snprintf(buffer, SIZE, "Dynamic");
6096            } else {
6097                snprintf(buffer, SIZE, "%s", formatStr);
6098            }
6099            result.append(buffer);
6100            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6101        }
6102        result.append("\n");
6103    }
6104    write(fd, result.string(), result.size());
6105    if (mGains.size() != 0) {
6106        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6107        write(fd, buffer, strlen(buffer) + 1);
6108        result.append(buffer);
6109        for (size_t i = 0; i < mGains.size(); i++) {
6110            mGains[i]->dump(fd, spaces + 2, i);
6111        }
6112    }
6113}
6114
6115// --- AudioGain class implementation
6116
6117AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6118{
6119    mIndex = index;
6120    mUseInChannelMask = useInChannelMask;
6121    memset(&mGain, 0, sizeof(struct audio_gain));
6122}
6123
6124void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6125{
6126    config->index = mIndex;
6127    config->mode = mGain.mode;
6128    config->channel_mask = mGain.channel_mask;
6129    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6130        config->values[0] = mGain.default_value;
6131    } else {
6132        uint32_t numValues;
6133        if (mUseInChannelMask) {
6134            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6135        } else {
6136            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6137        }
6138        for (size_t i = 0; i < numValues; i++) {
6139            config->values[i] = mGain.default_value;
6140        }
6141    }
6142    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6143        config->ramp_duration_ms = mGain.min_ramp_ms;
6144    }
6145}
6146
6147status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6148{
6149    if ((config->mode & ~mGain.mode) != 0) {
6150        return BAD_VALUE;
6151    }
6152    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6153        if ((config->values[0] < mGain.min_value) ||
6154                    (config->values[0] > mGain.max_value)) {
6155            return BAD_VALUE;
6156        }
6157    } else {
6158        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6159            return BAD_VALUE;
6160        }
6161        uint32_t numValues;
6162        if (mUseInChannelMask) {
6163            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6164        } else {
6165            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6166        }
6167        for (size_t i = 0; i < numValues; i++) {
6168            if ((config->values[i] < mGain.min_value) ||
6169                    (config->values[i] > mGain.max_value)) {
6170                return BAD_VALUE;
6171            }
6172        }
6173    }
6174    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6175        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6176                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6177            return BAD_VALUE;
6178        }
6179    }
6180    return NO_ERROR;
6181}
6182
6183void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6184{
6185    const size_t SIZE = 256;
6186    char buffer[SIZE];
6187    String8 result;
6188
6189    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6190    result.append(buffer);
6191    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6192    result.append(buffer);
6193    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6194    result.append(buffer);
6195    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6196    result.append(buffer);
6197    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6198    result.append(buffer);
6199    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6200    result.append(buffer);
6201    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6202    result.append(buffer);
6203    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6204    result.append(buffer);
6205    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6206    result.append(buffer);
6207
6208    write(fd, result.string(), result.size());
6209}
6210
6211// --- AudioPortConfig class implementation
6212
6213AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6214{
6215    mSamplingRate = 0;
6216    mChannelMask = AUDIO_CHANNEL_NONE;
6217    mFormat = AUDIO_FORMAT_INVALID;
6218    mGain.index = -1;
6219}
6220
6221status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6222                                                        const struct audio_port_config *config,
6223                                                        struct audio_port_config *backupConfig)
6224{
6225    struct audio_port_config localBackupConfig;
6226    status_t status = NO_ERROR;
6227
6228    localBackupConfig.config_mask = config->config_mask;
6229    toAudioPortConfig(&localBackupConfig);
6230
6231    if (mAudioPort == 0) {
6232        status = NO_INIT;
6233        goto exit;
6234    }
6235    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6236        status = mAudioPort->checkExactSamplingRate(config->sample_rate);
6237        if (status != NO_ERROR) {
6238            goto exit;
6239        }
6240        mSamplingRate = config->sample_rate;
6241    }
6242    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6243        status = mAudioPort->checkExactChannelMask(config->channel_mask);
6244        if (status != NO_ERROR) {
6245            goto exit;
6246        }
6247        mChannelMask = config->channel_mask;
6248    }
6249    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6250        status = mAudioPort->checkFormat(config->format);
6251        if (status != NO_ERROR) {
6252            goto exit;
6253        }
6254        mFormat = config->format;
6255    }
6256    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6257        status = mAudioPort->checkGain(&config->gain, config->gain.index);
6258        if (status != NO_ERROR) {
6259            goto exit;
6260        }
6261        mGain = config->gain;
6262    }
6263
6264exit:
6265    if (status != NO_ERROR) {
6266        applyAudioPortConfig(&localBackupConfig);
6267    }
6268    if (backupConfig != NULL) {
6269        *backupConfig = localBackupConfig;
6270    }
6271    return status;
6272}
6273
6274void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6275                                                    struct audio_port_config *dstConfig,
6276                                                    const struct audio_port_config *srcConfig) const
6277{
6278    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6279        dstConfig->sample_rate = mSamplingRate;
6280        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6281            dstConfig->sample_rate = srcConfig->sample_rate;
6282        }
6283    } else {
6284        dstConfig->sample_rate = 0;
6285    }
6286    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6287        dstConfig->channel_mask = mChannelMask;
6288        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6289            dstConfig->channel_mask = srcConfig->channel_mask;
6290        }
6291    } else {
6292        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6293    }
6294    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6295        dstConfig->format = mFormat;
6296        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6297            dstConfig->format = srcConfig->format;
6298        }
6299    } else {
6300        dstConfig->format = AUDIO_FORMAT_INVALID;
6301    }
6302    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6303        dstConfig->gain = mGain;
6304        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6305            dstConfig->gain = srcConfig->gain;
6306        }
6307    } else {
6308        dstConfig->gain.index = -1;
6309    }
6310    if (dstConfig->gain.index != -1) {
6311        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6312    } else {
6313        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6314    }
6315}
6316
6317// --- IOProfile class implementation
6318
6319AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6320                                         const sp<HwModule>& module)
6321    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6322{
6323}
6324
6325AudioPolicyManager::IOProfile::~IOProfile()
6326{
6327}
6328
6329// checks if the IO profile is compatible with specified parameters.
6330// Sampling rate, format and channel mask must be specified in order to
6331// get a valid a match
6332bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6333                                                            uint32_t samplingRate,
6334                                                            uint32_t *updatedSamplingRate,
6335                                                            audio_format_t format,
6336                                                            audio_channel_mask_t channelMask,
6337                                                            audio_output_flags_t flags) const
6338{
6339    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6340    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6341    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6342
6343    if ((mSupportedDevices.types() & device) != device) {
6344        return false;
6345    }
6346
6347    if (samplingRate == 0) {
6348         return false;
6349    }
6350    uint32_t myUpdatedSamplingRate = samplingRate;
6351    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6352         return false;
6353    }
6354    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6355            NO_ERROR) {
6356         return false;
6357    }
6358
6359    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6360        return false;
6361    }
6362
6363    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6364            checkExactChannelMask(channelMask) != NO_ERROR)) {
6365        return false;
6366    }
6367    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6368            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6369        return false;
6370    }
6371
6372    if (isPlaybackThread && (mFlags & flags) != flags) {
6373        return false;
6374    }
6375    // The only input flag that is allowed to be different is the fast flag.
6376    // An existing fast stream is compatible with a normal track request.
6377    // An existing normal stream is compatible with a fast track request,
6378    // but the fast request will be denied by AudioFlinger and converted to normal track.
6379    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
6380            ~AUDIO_INPUT_FLAG_FAST)) {
6381        return false;
6382    }
6383
6384    if (updatedSamplingRate != NULL) {
6385        *updatedSamplingRate = myUpdatedSamplingRate;
6386    }
6387    return true;
6388}
6389
6390void AudioPolicyManager::IOProfile::dump(int fd)
6391{
6392    const size_t SIZE = 256;
6393    char buffer[SIZE];
6394    String8 result;
6395
6396    AudioPort::dump(fd, 4);
6397
6398    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6399    result.append(buffer);
6400    snprintf(buffer, SIZE, "    - devices:\n");
6401    result.append(buffer);
6402    write(fd, result.string(), result.size());
6403    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6404        mSupportedDevices[i]->dump(fd, 6, i);
6405    }
6406}
6407
6408void AudioPolicyManager::IOProfile::log()
6409{
6410    const size_t SIZE = 256;
6411    char buffer[SIZE];
6412    String8 result;
6413
6414    ALOGV("    - sampling rates: ");
6415    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6416        ALOGV("  %d", mSamplingRates[i]);
6417    }
6418
6419    ALOGV("    - channel masks: ");
6420    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6421        ALOGV("  0x%04x", mChannelMasks[i]);
6422    }
6423
6424    ALOGV("    - formats: ");
6425    for (size_t i = 0; i < mFormats.size(); i++) {
6426        ALOGV("  0x%08x", mFormats[i]);
6427    }
6428
6429    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6430    ALOGV("    - flags: 0x%04x\n", mFlags);
6431}
6432
6433
6434// --- DeviceDescriptor implementation
6435
6436
6437AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6438                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6439                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6440                                                              AUDIO_PORT_ROLE_SOURCE,
6441                             NULL),
6442                     mDeviceType(type), mAddress(""), mId(0)
6443{
6444    mAudioPort = this;
6445    if (mGains.size() > 0) {
6446        mGains[0]->getDefaultConfig(&mGain);
6447    }
6448}
6449
6450bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6451{
6452    // Devices are considered equal if they:
6453    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6454    // - have the same address or one device does not specify the address
6455    // - have the same channel mask or one device does not specify the channel mask
6456    return (mDeviceType == other->mDeviceType) &&
6457           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6458           (mChannelMask == 0 || other->mChannelMask == 0 ||
6459                mChannelMask == other->mChannelMask);
6460}
6461
6462void AudioPolicyManager::DeviceVector::refreshTypes()
6463{
6464    mDeviceTypes = AUDIO_DEVICE_NONE;
6465    for(size_t i = 0; i < size(); i++) {
6466        mDeviceTypes |= itemAt(i)->mDeviceType;
6467    }
6468    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6469}
6470
6471ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6472{
6473    for(size_t i = 0; i < size(); i++) {
6474        if (item->equals(itemAt(i))) {
6475            return i;
6476        }
6477    }
6478    return -1;
6479}
6480
6481ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6482{
6483    ssize_t ret = indexOf(item);
6484
6485    if (ret < 0) {
6486        ret = SortedVector::add(item);
6487        if (ret >= 0) {
6488            refreshTypes();
6489        }
6490    } else {
6491        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6492        ret = -1;
6493    }
6494    return ret;
6495}
6496
6497ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6498{
6499    size_t i;
6500    ssize_t ret = indexOf(item);
6501
6502    if (ret < 0) {
6503        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6504    } else {
6505        ret = SortedVector::removeAt(ret);
6506        if (ret >= 0) {
6507            refreshTypes();
6508        }
6509    }
6510    return ret;
6511}
6512
6513void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6514{
6515    DeviceVector deviceList;
6516
6517    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6518    types &= ~role_bit;
6519
6520    while (types) {
6521        uint32_t i = 31 - __builtin_clz(types);
6522        uint32_t type = 1 << i;
6523        types &= ~type;
6524        add(new DeviceDescriptor(String8(""), type | role_bit));
6525    }
6526}
6527
6528void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6529                                                           const DeviceVector& declaredDevices)
6530{
6531    char *devName = strtok(name, "|");
6532    while (devName != NULL) {
6533        if (strlen(devName) != 0) {
6534            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6535                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6536                                 devName);
6537            if (type != AUDIO_DEVICE_NONE) {
6538                add(new DeviceDescriptor(String8(""), type));
6539            } else {
6540                sp<DeviceDescriptor> deviceDesc =
6541                        declaredDevices.getDeviceFromName(String8(devName));
6542                if (deviceDesc != 0) {
6543                    add(deviceDesc);
6544                }
6545            }
6546         }
6547        devName = strtok(NULL, "|");
6548     }
6549}
6550
6551sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6552                                                        audio_devices_t type, String8 address) const
6553{
6554    sp<DeviceDescriptor> device;
6555    for (size_t i = 0; i < size(); i++) {
6556        if (itemAt(i)->mDeviceType == type) {
6557            device = itemAt(i);
6558            if (itemAt(i)->mAddress = address) {
6559                break;
6560            }
6561        }
6562    }
6563    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6564          type, address.string(), device.get());
6565    return device;
6566}
6567
6568sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6569                                                                    audio_port_handle_t id) const
6570{
6571    sp<DeviceDescriptor> device;
6572    for (size_t i = 0; i < size(); i++) {
6573        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6574        if (itemAt(i)->mId == id) {
6575            device = itemAt(i);
6576            break;
6577        }
6578    }
6579    return device;
6580}
6581
6582AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6583                                                                        audio_devices_t type) const
6584{
6585    DeviceVector devices;
6586    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6587        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6588            devices.add(itemAt(i));
6589            type &= ~itemAt(i)->mDeviceType;
6590            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6591                  itemAt(i)->mDeviceType, itemAt(i).get());
6592        }
6593    }
6594    return devices;
6595}
6596
6597AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6598        audio_devices_t type, String8 address) const
6599{
6600    DeviceVector devices;
6601    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6602    for (size_t i = 0; i < size(); i++) {
6603        //ALOGV("     at i=%d: device=%x, addr=%s",
6604        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6605        if (itemAt(i)->mDeviceType == type) {
6606            if (itemAt(i)->mAddress == address) {
6607                //ALOGV("      found matching address %s", address.string());
6608                devices.add(itemAt(i));
6609            }
6610        }
6611    }
6612    return devices;
6613}
6614
6615sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6616        const String8& name) const
6617{
6618    sp<DeviceDescriptor> device;
6619    for (size_t i = 0; i < size(); i++) {
6620        if (itemAt(i)->mName == name) {
6621            device = itemAt(i);
6622            break;
6623        }
6624    }
6625    return device;
6626}
6627
6628void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6629                                                    struct audio_port_config *dstConfig,
6630                                                    const struct audio_port_config *srcConfig) const
6631{
6632    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6633    if (srcConfig != NULL) {
6634        dstConfig->config_mask |= srcConfig->config_mask;
6635    }
6636
6637    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6638
6639    dstConfig->id = mId;
6640    dstConfig->role = audio_is_output_device(mDeviceType) ?
6641                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6642    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6643    dstConfig->ext.device.type = mDeviceType;
6644    dstConfig->ext.device.hw_module = mModule->mHandle;
6645    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6646}
6647
6648void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6649{
6650    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6651    AudioPort::toAudioPort(port);
6652    port->id = mId;
6653    toAudioPortConfig(&port->active_config);
6654    port->ext.device.type = mDeviceType;
6655    port->ext.device.hw_module = mModule->mHandle;
6656    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6657}
6658
6659status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6660{
6661    const size_t SIZE = 256;
6662    char buffer[SIZE];
6663    String8 result;
6664
6665    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6666    result.append(buffer);
6667    if (mId != 0) {
6668        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6669        result.append(buffer);
6670    }
6671    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6672                                              enumToString(sDeviceNameToEnumTable,
6673                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6674                                                           mDeviceType));
6675    result.append(buffer);
6676    if (mAddress.size() != 0) {
6677        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6678        result.append(buffer);
6679    }
6680    write(fd, result.string(), result.size());
6681    AudioPort::dump(fd, spaces);
6682
6683    return NO_ERROR;
6684}
6685
6686
6687// --- audio_policy.conf file parsing
6688
6689audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6690{
6691    uint32_t flag = 0;
6692
6693    // it is OK to cast name to non const here as we are not going to use it after
6694    // strtok() modifies it
6695    char *flagName = strtok(name, "|");
6696    while (flagName != NULL) {
6697        if (strlen(flagName) != 0) {
6698            flag |= stringToEnum(sFlagNameToEnumTable,
6699                               ARRAY_SIZE(sFlagNameToEnumTable),
6700                               flagName);
6701        }
6702        flagName = strtok(NULL, "|");
6703    }
6704    //force direct flag if offload flag is set: offloading implies a direct output stream
6705    // and all common behaviors are driven by checking only the direct flag
6706    // this should normally be set appropriately in the policy configuration file
6707    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6708        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6709    }
6710
6711    return (audio_output_flags_t)flag;
6712}
6713
6714audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6715{
6716    uint32_t device = 0;
6717
6718    char *devName = strtok(name, "|");
6719    while (devName != NULL) {
6720        if (strlen(devName) != 0) {
6721            device |= stringToEnum(sDeviceNameToEnumTable,
6722                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6723                                 devName);
6724         }
6725        devName = strtok(NULL, "|");
6726     }
6727    return device;
6728}
6729
6730void AudioPolicyManager::loadHwModule(cnode *root)
6731{
6732    status_t status = NAME_NOT_FOUND;
6733    cnode *node;
6734    sp<HwModule> module = new HwModule(root->name);
6735
6736    node = config_find(root, DEVICES_TAG);
6737    if (node != NULL) {
6738        node = node->first_child;
6739        while (node) {
6740            ALOGV("loadHwModule() loading device %s", node->name);
6741            status_t tmpStatus = module->loadDevice(node);
6742            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6743                status = tmpStatus;
6744            }
6745            node = node->next;
6746        }
6747    }
6748    node = config_find(root, OUTPUTS_TAG);
6749    if (node != NULL) {
6750        node = node->first_child;
6751        while (node) {
6752            ALOGV("loadHwModule() loading output %s", node->name);
6753            status_t tmpStatus = module->loadOutput(node);
6754            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6755                status = tmpStatus;
6756            }
6757            node = node->next;
6758        }
6759    }
6760    node = config_find(root, INPUTS_TAG);
6761    if (node != NULL) {
6762        node = node->first_child;
6763        while (node) {
6764            ALOGV("loadHwModule() loading input %s", node->name);
6765            status_t tmpStatus = module->loadInput(node);
6766            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6767                status = tmpStatus;
6768            }
6769            node = node->next;
6770        }
6771    }
6772    loadGlobalConfig(root, module);
6773
6774    if (status == NO_ERROR) {
6775        mHwModules.add(module);
6776    }
6777}
6778
6779void AudioPolicyManager::loadHwModules(cnode *root)
6780{
6781    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6782    if (node == NULL) {
6783        return;
6784    }
6785
6786    node = node->first_child;
6787    while (node) {
6788        ALOGV("loadHwModules() loading module %s", node->name);
6789        loadHwModule(node);
6790        node = node->next;
6791    }
6792}
6793
6794void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6795{
6796    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6797
6798    if (node == NULL) {
6799        return;
6800    }
6801    DeviceVector declaredDevices;
6802    if (module != NULL) {
6803        declaredDevices = module->mDeclaredDevices;
6804    }
6805
6806    node = node->first_child;
6807    while (node) {
6808        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6809            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6810                                                        declaredDevices);
6811            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6812                  mAvailableOutputDevices.types());
6813        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6814            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6815                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6816                                              (char *)node->value);
6817            if (device != AUDIO_DEVICE_NONE) {
6818                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6819            } else {
6820                ALOGW("loadGlobalConfig() default device not specified");
6821            }
6822            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6823        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6824            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6825                                                       declaredDevices);
6826            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6827        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6828            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6829            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6830        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6831            uint32_t major, minor;
6832            sscanf((char *)node->value, "%u.%u", &major, &minor);
6833            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6834            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6835                  module->mHalVersion, major, minor);
6836        }
6837        node = node->next;
6838    }
6839}
6840
6841status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6842{
6843    cnode *root;
6844    char *data;
6845
6846    data = (char *)load_file(path, NULL);
6847    if (data == NULL) {
6848        return -ENODEV;
6849    }
6850    root = config_node("", "");
6851    config_load(root, data);
6852
6853    loadHwModules(root);
6854    // legacy audio_policy.conf files have one global_configuration section
6855    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
6856    config_free(root);
6857    free(root);
6858    free(data);
6859
6860    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
6861
6862    return NO_ERROR;
6863}
6864
6865void AudioPolicyManager::defaultAudioPolicyConfig(void)
6866{
6867    sp<HwModule> module;
6868    sp<IOProfile> profile;
6869    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
6870                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
6871    mAvailableOutputDevices.add(mDefaultOutputDevice);
6872    mAvailableInputDevices.add(defaultInputDevice);
6873
6874    module = new HwModule("primary");
6875
6876    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
6877    profile->mSamplingRates.add(44100);
6878    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6879    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
6880    profile->mSupportedDevices.add(mDefaultOutputDevice);
6881    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
6882    module->mOutputProfiles.add(profile);
6883
6884    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
6885    profile->mSamplingRates.add(8000);
6886    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6887    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
6888    profile->mSupportedDevices.add(defaultInputDevice);
6889    module->mInputProfiles.add(profile);
6890
6891    mHwModules.add(module);
6892}
6893
6894audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
6895{
6896    // flags to stream type mapping
6897    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
6898        return AUDIO_STREAM_ENFORCED_AUDIBLE;
6899    }
6900    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
6901        return AUDIO_STREAM_BLUETOOTH_SCO;
6902    }
6903
6904    // usage to stream type mapping
6905    switch (attr->usage) {
6906    case AUDIO_USAGE_MEDIA:
6907    case AUDIO_USAGE_GAME:
6908    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
6909    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
6910        return AUDIO_STREAM_MUSIC;
6911    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
6912        return AUDIO_STREAM_SYSTEM;
6913    case AUDIO_USAGE_VOICE_COMMUNICATION:
6914        return AUDIO_STREAM_VOICE_CALL;
6915
6916    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
6917        return AUDIO_STREAM_DTMF;
6918
6919    case AUDIO_USAGE_ALARM:
6920        return AUDIO_STREAM_ALARM;
6921    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
6922        return AUDIO_STREAM_RING;
6923
6924    case AUDIO_USAGE_NOTIFICATION:
6925    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
6926    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
6927    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
6928    case AUDIO_USAGE_NOTIFICATION_EVENT:
6929        return AUDIO_STREAM_NOTIFICATION;
6930
6931    case AUDIO_USAGE_UNKNOWN:
6932    default:
6933        return AUDIO_STREAM_MUSIC;
6934    }
6935}
6936}; // namespace android
6937