AudioPolicyManager.cpp revision 4789dea53f9e4404762cbeceafa7b54cf67dc77a 
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    snprintf(buffer, SIZE, "\nAudio Patches:\n");
1849    write(fd, buffer, strlen(buffer));
1850    for (size_t i = 0; i < mAudioPatches.size(); i++) {
1851        mAudioPatches[i]->dump(fd, 2, i);
1852    }
1853
1854    return NO_ERROR;
1855}
1856
1857// This function checks for the parameters which can be offloaded.
1858// This can be enhanced depending on the capability of the DSP and policy
1859// of the system.
1860bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1861{
1862    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1863     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1864     offloadInfo.sample_rate, offloadInfo.channel_mask,
1865     offloadInfo.format,
1866     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1867     offloadInfo.has_video);
1868
1869    // Check if offload has been disabled
1870    char propValue[PROPERTY_VALUE_MAX];
1871    if (property_get("audio.offload.disable", propValue, "0")) {
1872        if (atoi(propValue) != 0) {
1873            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1874            return false;
1875        }
1876    }
1877
1878    // Check if stream type is music, then only allow offload as of now.
1879    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1880    {
1881        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1882        return false;
1883    }
1884
1885    //TODO: enable audio offloading with video when ready
1886    if (offloadInfo.has_video)
1887    {
1888        ALOGV("isOffloadSupported: has_video == true, returning false");
1889        return false;
1890    }
1891
1892    //If duration is less than minimum value defined in property, return false
1893    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1894        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1895            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1896            return false;
1897        }
1898    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1899        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1900        return false;
1901    }
1902
1903    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1904    // creating an offloaded track and tearing it down immediately after start when audioflinger
1905    // detects there is an active non offloadable effect.
1906    // FIXME: We should check the audio session here but we do not have it in this context.
1907    // This may prevent offloading in rare situations where effects are left active by apps
1908    // in the background.
1909    if (isNonOffloadableEffectEnabled()) {
1910        return false;
1911    }
1912
1913    // See if there is a profile to support this.
1914    // AUDIO_DEVICE_NONE
1915    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1916                                            offloadInfo.sample_rate,
1917                                            offloadInfo.format,
1918                                            offloadInfo.channel_mask,
1919                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1920    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1921    return (profile != 0);
1922}
1923
1924status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1925                                            audio_port_type_t type,
1926                                            unsigned int *num_ports,
1927                                            struct audio_port *ports,
1928                                            unsigned int *generation)
1929{
1930    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1931            generation == NULL) {
1932        return BAD_VALUE;
1933    }
1934    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1935    if (ports == NULL) {
1936        *num_ports = 0;
1937    }
1938
1939    size_t portsWritten = 0;
1940    size_t portsMax = *num_ports;
1941    *num_ports = 0;
1942    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1943        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1944            for (size_t i = 0;
1945                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1946                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1947            }
1948            *num_ports += mAvailableOutputDevices.size();
1949        }
1950        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1951            for (size_t i = 0;
1952                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1953                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1954            }
1955            *num_ports += mAvailableInputDevices.size();
1956        }
1957    }
1958    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1959        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1960            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1961                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1962            }
1963            *num_ports += mInputs.size();
1964        }
1965        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1966            size_t numOutputs = 0;
1967            for (size_t i = 0; i < mOutputs.size(); i++) {
1968                if (!mOutputs[i]->isDuplicated()) {
1969                    numOutputs++;
1970                    if (portsWritten < portsMax) {
1971                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
1972                    }
1973                }
1974            }
1975            *num_ports += numOutputs;
1976        }
1977    }
1978    *generation = curAudioPortGeneration();
1979    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
1980    return NO_ERROR;
1981}
1982
1983status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
1984{
1985    return NO_ERROR;
1986}
1987
1988sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
1989                                                                    audio_port_handle_t id) const
1990{
1991    sp<AudioOutputDescriptor> outputDesc = NULL;
1992    for (size_t i = 0; i < mOutputs.size(); i++) {
1993        outputDesc = mOutputs.valueAt(i);
1994        if (outputDesc->mId == id) {
1995            break;
1996        }
1997    }
1998    return outputDesc;
1999}
2000
2001sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2002                                                                    audio_port_handle_t id) const
2003{
2004    sp<AudioInputDescriptor> inputDesc = NULL;
2005    for (size_t i = 0; i < mInputs.size(); i++) {
2006        inputDesc = mInputs.valueAt(i);
2007        if (inputDesc->mId == id) {
2008            break;
2009        }
2010    }
2011    return inputDesc;
2012}
2013
2014sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2015                                                                    audio_devices_t device) const
2016{
2017    sp <HwModule> module;
2018
2019    for (size_t i = 0; i < mHwModules.size(); i++) {
2020        if (mHwModules[i]->mHandle == 0) {
2021            continue;
2022        }
2023        if (audio_is_output_device(device)) {
2024            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2025            {
2026                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2027                    return mHwModules[i];
2028                }
2029            }
2030        } else {
2031            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2032                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2033                        device & ~AUDIO_DEVICE_BIT_IN) {
2034                    return mHwModules[i];
2035                }
2036            }
2037        }
2038    }
2039    return module;
2040}
2041
2042sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2043{
2044    sp <HwModule> module;
2045
2046    for (size_t i = 0; i < mHwModules.size(); i++)
2047    {
2048        if (strcmp(mHwModules[i]->mName, name) == 0) {
2049            return mHwModules[i];
2050        }
2051    }
2052    return module;
2053}
2054
2055audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2056{
2057    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2058    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2059    return devices & mAvailableOutputDevices.types();
2060}
2061
2062audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2063{
2064    audio_module_handle_t primaryHandle =
2065                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2066    audio_devices_t devices = AUDIO_DEVICE_NONE;
2067    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2068        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2069            devices |= mAvailableInputDevices[i]->mDeviceType;
2070        }
2071    }
2072    return devices;
2073}
2074
2075status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2076                                               audio_patch_handle_t *handle,
2077                                               uid_t uid)
2078{
2079    ALOGV("createAudioPatch()");
2080
2081    if (handle == NULL || patch == NULL) {
2082        return BAD_VALUE;
2083    }
2084    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2085
2086    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2087            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2088        return BAD_VALUE;
2089    }
2090    // only one source per audio patch supported for now
2091    if (patch->num_sources > 1) {
2092        return INVALID_OPERATION;
2093    }
2094
2095    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2096        return INVALID_OPERATION;
2097    }
2098    for (size_t i = 0; i < patch->num_sinks; i++) {
2099        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2100            return INVALID_OPERATION;
2101        }
2102    }
2103
2104    sp<AudioPatch> patchDesc;
2105    ssize_t index = mAudioPatches.indexOfKey(*handle);
2106
2107    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2108                                                           patch->sources[0].role,
2109                                                           patch->sources[0].type);
2110#if LOG_NDEBUG == 0
2111    for (size_t i = 0; i < patch->num_sinks; i++) {
2112        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2113                                                             patch->sinks[i].role,
2114                                                             patch->sinks[i].type);
2115    }
2116#endif
2117
2118    if (index >= 0) {
2119        patchDesc = mAudioPatches.valueAt(index);
2120        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2121                                                                  mUidCached, patchDesc->mUid, uid);
2122        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2123            return INVALID_OPERATION;
2124        }
2125    } else {
2126        *handle = 0;
2127    }
2128
2129    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2130        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2131        if (outputDesc == NULL) {
2132            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2133            return BAD_VALUE;
2134        }
2135        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2136                                                outputDesc->mIoHandle);
2137        if (patchDesc != 0) {
2138            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2139                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2140                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2141                return BAD_VALUE;
2142            }
2143        }
2144        DeviceVector devices;
2145        for (size_t i = 0; i < patch->num_sinks; i++) {
2146            // Only support mix to devices connection
2147            // TODO add support for mix to mix connection
2148            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2149                ALOGV("createAudioPatch() source mix but sink is not a device");
2150                return INVALID_OPERATION;
2151            }
2152            sp<DeviceDescriptor> devDesc =
2153                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2154            if (devDesc == 0) {
2155                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2156                return BAD_VALUE;
2157            }
2158
2159            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2160                                                           patch->sources[0].sample_rate,
2161                                                         NULL,  // updatedSamplingRate
2162                                                         patch->sources[0].format,
2163                                                         patch->sources[0].channel_mask,
2164                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2165                ALOGV("createAudioPatch() profile not supported for device %08x",
2166                      devDesc->mDeviceType);
2167                return INVALID_OPERATION;
2168            }
2169            devices.add(devDesc);
2170        }
2171        if (devices.size() == 0) {
2172            return INVALID_OPERATION;
2173        }
2174
2175        // TODO: reconfigure output format and channels here
2176        ALOGV("createAudioPatch() setting device %08x on output %d",
2177              devices.types(), outputDesc->mIoHandle);
2178        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2179        index = mAudioPatches.indexOfKey(*handle);
2180        if (index >= 0) {
2181            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2182                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2183            }
2184            patchDesc = mAudioPatches.valueAt(index);
2185            patchDesc->mUid = uid;
2186            ALOGV("createAudioPatch() success");
2187        } else {
2188            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2189            return INVALID_OPERATION;
2190        }
2191    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2192        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2193            // input device to input mix connection
2194            // only one sink supported when connecting an input device to a mix
2195            if (patch->num_sinks > 1) {
2196                return INVALID_OPERATION;
2197            }
2198            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2199            if (inputDesc == NULL) {
2200                return BAD_VALUE;
2201            }
2202            if (patchDesc != 0) {
2203                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2204                    return BAD_VALUE;
2205                }
2206            }
2207            sp<DeviceDescriptor> devDesc =
2208                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2209            if (devDesc == 0) {
2210                return BAD_VALUE;
2211            }
2212
2213            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2214                                                         patch->sinks[0].sample_rate,
2215                                                         NULL, /*updatedSampleRate*/
2216                                                         patch->sinks[0].format,
2217                                                         patch->sinks[0].channel_mask,
2218                                                         // FIXME for the parameter type,
2219                                                         // and the NONE
2220                                                         (audio_output_flags_t)
2221                                                            AUDIO_INPUT_FLAG_NONE)) {
2222                return INVALID_OPERATION;
2223            }
2224            // TODO: reconfigure output format and channels here
2225            ALOGV("createAudioPatch() setting device %08x on output %d",
2226                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2227            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2228            index = mAudioPatches.indexOfKey(*handle);
2229            if (index >= 0) {
2230                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2231                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2232                }
2233                patchDesc = mAudioPatches.valueAt(index);
2234                patchDesc->mUid = uid;
2235                ALOGV("createAudioPatch() success");
2236            } else {
2237                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2238                return INVALID_OPERATION;
2239            }
2240        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2241            // device to device connection
2242            if (patchDesc != 0) {
2243                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2244                    return BAD_VALUE;
2245                }
2246            }
2247            sp<DeviceDescriptor> srcDeviceDesc =
2248                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2249
2250            //update source and sink with our own data as the data passed in the patch may
2251            // be incomplete.
2252            struct audio_patch newPatch = *patch;
2253            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2254            if (srcDeviceDesc == 0) {
2255                return BAD_VALUE;
2256            }
2257
2258            for (size_t i = 0; i < patch->num_sinks; i++) {
2259                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2260                    ALOGV("createAudioPatch() source device but one sink is not a device");
2261                    return INVALID_OPERATION;
2262                }
2263
2264                sp<DeviceDescriptor> sinkDeviceDesc =
2265                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2266                if (sinkDeviceDesc == 0) {
2267                    return BAD_VALUE;
2268                }
2269                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2270
2271                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2272                    // only one sink supported when connected devices across HW modules
2273                    if (patch->num_sinks > 1) {
2274                        return INVALID_OPERATION;
2275                    }
2276                    SortedVector<audio_io_handle_t> outputs =
2277                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2278                                                                mOutputs);
2279                    // if the sink device is reachable via an opened output stream, request to go via
2280                    // this output stream by adding a second source to the patch description
2281                    audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
2282                    if (output != AUDIO_IO_HANDLE_NONE) {
2283                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2284                        if (outputDesc->isDuplicated()) {
2285                            return INVALID_OPERATION;
2286                        }
2287                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2288                        newPatch.num_sources = 2;
2289                    }
2290                }
2291            }
2292            // TODO: check from routing capabilities in config file and other conflicting patches
2293
2294            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2295            if (index >= 0) {
2296                afPatchHandle = patchDesc->mAfPatchHandle;
2297            }
2298
2299            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2300                                                                  &afPatchHandle,
2301                                                                  0);
2302            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2303                                                                  status, afPatchHandle);
2304            if (status == NO_ERROR) {
2305                if (index < 0) {
2306                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2307                                               &newPatch, uid);
2308                    addAudioPatch(patchDesc->mHandle, patchDesc);
2309                } else {
2310                    patchDesc->mPatch = newPatch;
2311                }
2312                patchDesc->mAfPatchHandle = afPatchHandle;
2313                *handle = patchDesc->mHandle;
2314                nextAudioPortGeneration();
2315                mpClientInterface->onAudioPatchListUpdate();
2316            } else {
2317                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2318                status);
2319                return INVALID_OPERATION;
2320            }
2321        } else {
2322            return BAD_VALUE;
2323        }
2324    } else {
2325        return BAD_VALUE;
2326    }
2327    return NO_ERROR;
2328}
2329
2330status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2331                                                  uid_t uid)
2332{
2333    ALOGV("releaseAudioPatch() patch %d", handle);
2334
2335    ssize_t index = mAudioPatches.indexOfKey(handle);
2336
2337    if (index < 0) {
2338        return BAD_VALUE;
2339    }
2340    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2341    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2342          mUidCached, patchDesc->mUid, uid);
2343    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2344        return INVALID_OPERATION;
2345    }
2346
2347    struct audio_patch *patch = &patchDesc->mPatch;
2348    patchDesc->mUid = mUidCached;
2349    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2350        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2351        if (outputDesc == NULL) {
2352            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2353            return BAD_VALUE;
2354        }
2355
2356        setOutputDevice(outputDesc->mIoHandle,
2357                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2358                       true,
2359                       0,
2360                       NULL);
2361    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2362        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2363            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2364            if (inputDesc == NULL) {
2365                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2366                return BAD_VALUE;
2367            }
2368            setInputDevice(inputDesc->mIoHandle,
2369                           getNewInputDevice(inputDesc->mIoHandle),
2370                           true,
2371                           NULL);
2372        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2373            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2374            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2375            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2376                                                              status, patchDesc->mAfPatchHandle);
2377            removeAudioPatch(patchDesc->mHandle);
2378            nextAudioPortGeneration();
2379            mpClientInterface->onAudioPatchListUpdate();
2380        } else {
2381            return BAD_VALUE;
2382        }
2383    } else {
2384        return BAD_VALUE;
2385    }
2386    return NO_ERROR;
2387}
2388
2389status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2390                                              struct audio_patch *patches,
2391                                              unsigned int *generation)
2392{
2393    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2394            generation == NULL) {
2395        return BAD_VALUE;
2396    }
2397    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2398          *num_patches, patches, mAudioPatches.size());
2399    if (patches == NULL) {
2400        *num_patches = 0;
2401    }
2402
2403    size_t patchesWritten = 0;
2404    size_t patchesMax = *num_patches;
2405    for (size_t i = 0;
2406            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2407        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2408        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2409        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2410              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2411    }
2412    *num_patches = mAudioPatches.size();
2413
2414    *generation = curAudioPortGeneration();
2415    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2416    return NO_ERROR;
2417}
2418
2419status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2420{
2421    ALOGV("setAudioPortConfig()");
2422
2423    if (config == NULL) {
2424        return BAD_VALUE;
2425    }
2426    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2427    // Only support gain configuration for now
2428    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2429        return INVALID_OPERATION;
2430    }
2431
2432    sp<AudioPortConfig> audioPortConfig;
2433    if (config->type == AUDIO_PORT_TYPE_MIX) {
2434        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2435            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2436            if (outputDesc == NULL) {
2437                return BAD_VALUE;
2438            }
2439            ALOG_ASSERT(!outputDesc->isDuplicated(),
2440                        "setAudioPortConfig() called on duplicated output %d",
2441                        outputDesc->mIoHandle);
2442            audioPortConfig = outputDesc;
2443        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2444            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2445            if (inputDesc == NULL) {
2446                return BAD_VALUE;
2447            }
2448            audioPortConfig = inputDesc;
2449        } else {
2450            return BAD_VALUE;
2451        }
2452    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2453        sp<DeviceDescriptor> deviceDesc;
2454        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2455            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2456        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2457            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2458        } else {
2459            return BAD_VALUE;
2460        }
2461        if (deviceDesc == NULL) {
2462            return BAD_VALUE;
2463        }
2464        audioPortConfig = deviceDesc;
2465    } else {
2466        return BAD_VALUE;
2467    }
2468
2469    struct audio_port_config backupConfig;
2470    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2471    if (status == NO_ERROR) {
2472        struct audio_port_config newConfig;
2473        audioPortConfig->toAudioPortConfig(&newConfig, config);
2474        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2475    }
2476    if (status != NO_ERROR) {
2477        audioPortConfig->applyAudioPortConfig(&backupConfig);
2478    }
2479
2480    return status;
2481}
2482
2483void AudioPolicyManager::clearAudioPatches(uid_t uid)
2484{
2485    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2486        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2487        if (patchDesc->mUid == uid) {
2488            // releaseAudioPatch() removes the patch from mAudioPatches
2489            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2490                i--;
2491            }
2492        }
2493    }
2494}
2495
2496status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2497                                       audio_io_handle_t *ioHandle,
2498                                       audio_devices_t *device)
2499{
2500    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2501    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2502    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2503
2504    mSoundTriggerSessions.add(*session, *ioHandle);
2505
2506    return NO_ERROR;
2507}
2508
2509status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2510{
2511    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2512    if (index < 0) {
2513        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2514        return BAD_VALUE;
2515    }
2516
2517    mSoundTriggerSessions.removeItem(session);
2518    return NO_ERROR;
2519}
2520
2521status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2522                                           const sp<AudioPatch>& patch)
2523{
2524    ssize_t index = mAudioPatches.indexOfKey(handle);
2525
2526    if (index >= 0) {
2527        ALOGW("addAudioPatch() patch %d already in", handle);
2528        return ALREADY_EXISTS;
2529    }
2530    mAudioPatches.add(handle, patch);
2531    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2532            "sink handle %d",
2533          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2534          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2535    return NO_ERROR;
2536}
2537
2538status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2539{
2540    ssize_t index = mAudioPatches.indexOfKey(handle);
2541
2542    if (index < 0) {
2543        ALOGW("removeAudioPatch() patch %d not in", handle);
2544        return ALREADY_EXISTS;
2545    }
2546    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2547                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2548    mAudioPatches.removeItemsAt(index);
2549    return NO_ERROR;
2550}
2551
2552// ----------------------------------------------------------------------------
2553// AudioPolicyManager
2554// ----------------------------------------------------------------------------
2555
2556uint32_t AudioPolicyManager::nextUniqueId()
2557{
2558    return android_atomic_inc(&mNextUniqueId);
2559}
2560
2561uint32_t AudioPolicyManager::nextAudioPortGeneration()
2562{
2563    return android_atomic_inc(&mAudioPortGeneration);
2564}
2565
2566AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2567    :
2568#ifdef AUDIO_POLICY_TEST
2569    Thread(false),
2570#endif //AUDIO_POLICY_TEST
2571    mPrimaryOutput((audio_io_handle_t)0),
2572    mPhoneState(AUDIO_MODE_NORMAL),
2573    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2574    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2575    mA2dpSuspended(false),
2576    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2577    mAudioPortGeneration(1)
2578{
2579    mUidCached = getuid();
2580    mpClientInterface = clientInterface;
2581
2582    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2583        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2584    }
2585
2586    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2587    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2588        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2589            ALOGE("could not load audio policy configuration file, setting defaults");
2590            defaultAudioPolicyConfig();
2591        }
2592    }
2593    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2594
2595    // must be done after reading the policy
2596    initializeVolumeCurves();
2597
2598    // open all output streams needed to access attached devices
2599    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2600    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2601    for (size_t i = 0; i < mHwModules.size(); i++) {
2602        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2603        if (mHwModules[i]->mHandle == 0) {
2604            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2605            continue;
2606        }
2607        // open all output streams needed to access attached devices
2608        // except for direct output streams that are only opened when they are actually
2609        // required by an app.
2610        // This also validates mAvailableOutputDevices list
2611        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2612        {
2613            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2614
2615            if (outProfile->mSupportedDevices.isEmpty()) {
2616                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2617                continue;
2618            }
2619
2620            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2621            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2622                profileType = mDefaultOutputDevice->mDeviceType;
2623            } else {
2624                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2625            }
2626            if ((profileType & outputDeviceTypes) &&
2627                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2628                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2629
2630                outputDesc->mDevice = profileType;
2631                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2632                config.sample_rate = outputDesc->mSamplingRate;
2633                config.channel_mask = outputDesc->mChannelMask;
2634                config.format = outputDesc->mFormat;
2635                audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2636                status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2637                                                                &output,
2638                                                                &config,
2639                                                                &outputDesc->mDevice,
2640                                                                String8(""),
2641                                                                &outputDesc->mLatency,
2642                                                                outputDesc->mFlags);
2643
2644                if (status != NO_ERROR) {
2645                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2646                          outputDesc->mDevice,
2647                          mHwModules[i]->mName);
2648                } else {
2649                    outputDesc->mSamplingRate = config.sample_rate;
2650                    outputDesc->mChannelMask = config.channel_mask;
2651                    outputDesc->mFormat = config.format;
2652
2653                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2654                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2655                        ssize_t index =
2656                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2657                        // give a valid ID to an attached device once confirmed it is reachable
2658                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2659                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2660                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2661                        }
2662                    }
2663                    if (mPrimaryOutput == 0 &&
2664                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2665                        mPrimaryOutput = output;
2666                    }
2667                    addOutput(output, outputDesc);
2668                    setOutputDevice(output,
2669                                    outputDesc->mDevice,
2670                                    true);
2671                }
2672            }
2673        }
2674        // open input streams needed to access attached devices to validate
2675        // mAvailableInputDevices list
2676        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2677        {
2678            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2679
2680            if (inProfile->mSupportedDevices.isEmpty()) {
2681                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2682                continue;
2683            }
2684
2685            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2686            if (profileType & inputDeviceTypes) {
2687                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2688
2689                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2690                inputDesc->mDevice = profileType;
2691
2692                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2693                config.sample_rate = inputDesc->mSamplingRate;
2694                config.channel_mask = inputDesc->mChannelMask;
2695                config.format = inputDesc->mFormat;
2696                audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2697                status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2698                                                               &input,
2699                                                               &config,
2700                                                               &inputDesc->mDevice,
2701                                                               String8(""),
2702                                                               AUDIO_SOURCE_MIC,
2703                                                               AUDIO_INPUT_FLAG_NONE);
2704
2705                if (status == NO_ERROR) {
2706                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2707                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2708                        ssize_t index =
2709                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2710                        // give a valid ID to an attached device once confirmed it is reachable
2711                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2712                            mAvailableInputDevices[index]->mId = nextUniqueId();
2713                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2714                        }
2715                    }
2716                    mpClientInterface->closeInput(input);
2717                } else {
2718                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2719                          inputDesc->mDevice,
2720                          mHwModules[i]->mName);
2721                }
2722            }
2723        }
2724    }
2725    // make sure all attached devices have been allocated a unique ID
2726    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2727        if (mAvailableOutputDevices[i]->mId == 0) {
2728            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2729            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2730            continue;
2731        }
2732        i++;
2733    }
2734    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2735        if (mAvailableInputDevices[i]->mId == 0) {
2736            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2737            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2738            continue;
2739        }
2740        i++;
2741    }
2742    // make sure default device is reachable
2743    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2744        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2745    }
2746
2747    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2748
2749    updateDevicesAndOutputs();
2750
2751#ifdef AUDIO_POLICY_TEST
2752    if (mPrimaryOutput != 0) {
2753        AudioParameter outputCmd = AudioParameter();
2754        outputCmd.addInt(String8("set_id"), 0);
2755        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2756
2757        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2758        mTestSamplingRate = 44100;
2759        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2760        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2761        mTestLatencyMs = 0;
2762        mCurOutput = 0;
2763        mDirectOutput = false;
2764        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2765            mTestOutputs[i] = 0;
2766        }
2767
2768        const size_t SIZE = 256;
2769        char buffer[SIZE];
2770        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2771        run(buffer, ANDROID_PRIORITY_AUDIO);
2772    }
2773#endif //AUDIO_POLICY_TEST
2774}
2775
2776AudioPolicyManager::~AudioPolicyManager()
2777{
2778#ifdef AUDIO_POLICY_TEST
2779    exit();
2780#endif //AUDIO_POLICY_TEST
2781   for (size_t i = 0; i < mOutputs.size(); i++) {
2782        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2783   }
2784   for (size_t i = 0; i < mInputs.size(); i++) {
2785        mpClientInterface->closeInput(mInputs.keyAt(i));
2786   }
2787   mAvailableOutputDevices.clear();
2788   mAvailableInputDevices.clear();
2789   mOutputs.clear();
2790   mInputs.clear();
2791   mHwModules.clear();
2792}
2793
2794status_t AudioPolicyManager::initCheck()
2795{
2796    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2797}
2798
2799#ifdef AUDIO_POLICY_TEST
2800bool AudioPolicyManager::threadLoop()
2801{
2802    ALOGV("entering threadLoop()");
2803    while (!exitPending())
2804    {
2805        String8 command;
2806        int valueInt;
2807        String8 value;
2808
2809        Mutex::Autolock _l(mLock);
2810        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2811
2812        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2813        AudioParameter param = AudioParameter(command);
2814
2815        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2816            valueInt != 0) {
2817            ALOGV("Test command %s received", command.string());
2818            String8 target;
2819            if (param.get(String8("target"), target) != NO_ERROR) {
2820                target = "Manager";
2821            }
2822            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2823                param.remove(String8("test_cmd_policy_output"));
2824                mCurOutput = valueInt;
2825            }
2826            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2827                param.remove(String8("test_cmd_policy_direct"));
2828                if (value == "false") {
2829                    mDirectOutput = false;
2830                } else if (value == "true") {
2831                    mDirectOutput = true;
2832                }
2833            }
2834            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2835                param.remove(String8("test_cmd_policy_input"));
2836                mTestInput = valueInt;
2837            }
2838
2839            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2840                param.remove(String8("test_cmd_policy_format"));
2841                int format = AUDIO_FORMAT_INVALID;
2842                if (value == "PCM 16 bits") {
2843                    format = AUDIO_FORMAT_PCM_16_BIT;
2844                } else if (value == "PCM 8 bits") {
2845                    format = AUDIO_FORMAT_PCM_8_BIT;
2846                } else if (value == "Compressed MP3") {
2847                    format = AUDIO_FORMAT_MP3;
2848                }
2849                if (format != AUDIO_FORMAT_INVALID) {
2850                    if (target == "Manager") {
2851                        mTestFormat = format;
2852                    } else if (mTestOutputs[mCurOutput] != 0) {
2853                        AudioParameter outputParam = AudioParameter();
2854                        outputParam.addInt(String8("format"), format);
2855                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2856                    }
2857                }
2858            }
2859            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2860                param.remove(String8("test_cmd_policy_channels"));
2861                int channels = 0;
2862
2863                if (value == "Channels Stereo") {
2864                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2865                } else if (value == "Channels Mono") {
2866                    channels =  AUDIO_CHANNEL_OUT_MONO;
2867                }
2868                if (channels != 0) {
2869                    if (target == "Manager") {
2870                        mTestChannels = channels;
2871                    } else if (mTestOutputs[mCurOutput] != 0) {
2872                        AudioParameter outputParam = AudioParameter();
2873                        outputParam.addInt(String8("channels"), channels);
2874                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2875                    }
2876                }
2877            }
2878            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2879                param.remove(String8("test_cmd_policy_sampleRate"));
2880                if (valueInt >= 0 && valueInt <= 96000) {
2881                    int samplingRate = valueInt;
2882                    if (target == "Manager") {
2883                        mTestSamplingRate = samplingRate;
2884                    } else if (mTestOutputs[mCurOutput] != 0) {
2885                        AudioParameter outputParam = AudioParameter();
2886                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2887                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2888                    }
2889                }
2890            }
2891
2892            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2893                param.remove(String8("test_cmd_policy_reopen"));
2894
2895                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2896                mpClientInterface->closeOutput(mPrimaryOutput);
2897
2898                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2899
2900                mOutputs.removeItem(mPrimaryOutput);
2901
2902                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2903                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2904                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2905                config.sample_rate = outputDesc->mSamplingRate;
2906                config.channel_mask = outputDesc->mChannelMask;
2907                config.format = outputDesc->mFormat;
2908                status_t status = mpClientInterface->openOutput(moduleHandle,
2909                                                                &mPrimaryOutput,
2910                                                                &config,
2911                                                                &outputDesc->mDevice,
2912                                                                String8(""),
2913                                                                &outputDesc->mLatency,
2914                                                                outputDesc->mFlags);
2915                if (status != NO_ERROR) {
2916                    ALOGE("Failed to reopen hardware output stream, "
2917                        "samplingRate: %d, format %d, channels %d",
2918                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2919                } else {
2920                    outputDesc->mSamplingRate = config.sample_rate;
2921                    outputDesc->mChannelMask = config.channel_mask;
2922                    outputDesc->mFormat = config.format;
2923                    AudioParameter outputCmd = AudioParameter();
2924                    outputCmd.addInt(String8("set_id"), 0);
2925                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2926                    addOutput(mPrimaryOutput, outputDesc);
2927                }
2928            }
2929
2930
2931            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2932        }
2933    }
2934    return false;
2935}
2936
2937void AudioPolicyManager::exit()
2938{
2939    {
2940        AutoMutex _l(mLock);
2941        requestExit();
2942        mWaitWorkCV.signal();
2943    }
2944    requestExitAndWait();
2945}
2946
2947int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2948{
2949    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2950        if (output == mTestOutputs[i]) return i;
2951    }
2952    return 0;
2953}
2954#endif //AUDIO_POLICY_TEST
2955
2956// ---
2957
2958void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2959{
2960    outputDesc->mIoHandle = output;
2961    outputDesc->mId = nextUniqueId();
2962    mOutputs.add(output, outputDesc);
2963    nextAudioPortGeneration();
2964}
2965
2966void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2967{
2968    inputDesc->mIoHandle = input;
2969    inputDesc->mId = nextUniqueId();
2970    mInputs.add(input, inputDesc);
2971    nextAudioPortGeneration();
2972}
2973
2974void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
2975        const String8 address /*in*/,
2976        SortedVector<audio_io_handle_t>& outputs /*out*/) {
2977    // look for a match on the given address on the addresses of the outputs:
2978    // find the address by finding the patch that maps to this output
2979    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
2980    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
2981    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
2982    if (patchIdx >= 0) {
2983        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
2984        const int numSinks = patchDesc->mPatch.num_sinks;
2985        for (ssize_t j=0; j < numSinks; j++) {
2986            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
2987                const char* patchAddr =
2988                        patchDesc->mPatch.sinks[j].ext.device.address;
2989                if (strncmp(patchAddr,
2990                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
2991                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
2992                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
2993                    outputs.add(desc->mIoHandle);
2994                    break;
2995                }
2996            }
2997        }
2998    }
2999}
3000
3001status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3002                                                       audio_policy_dev_state_t state,
3003                                                       SortedVector<audio_io_handle_t>& outputs,
3004                                                       const String8 address)
3005{
3006    audio_devices_t device = devDesc->mDeviceType;
3007    sp<AudioOutputDescriptor> desc;
3008    // erase all current sample rates, formats and channel masks
3009    devDesc->clearCapabilities();
3010
3011    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3012        // first list already open outputs that can be routed to this device
3013        for (size_t i = 0; i < mOutputs.size(); i++) {
3014            desc = mOutputs.valueAt(i);
3015            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3016                if (!deviceDistinguishesOnAddress(device)) {
3017                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3018                    outputs.add(mOutputs.keyAt(i));
3019                } else {
3020                    ALOGV("  checking address match due to device 0x%x", device);
3021                    findIoHandlesByAddress(desc, address, outputs);
3022                }
3023            }
3024        }
3025        // then look for output profiles that can be routed to this device
3026        SortedVector< sp<IOProfile> > profiles;
3027        for (size_t i = 0; i < mHwModules.size(); i++)
3028        {
3029            if (mHwModules[i]->mHandle == 0) {
3030                continue;
3031            }
3032            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3033            {
3034                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3035                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3036                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3037                }
3038            }
3039        }
3040
3041        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3042
3043        if (profiles.isEmpty() && outputs.isEmpty()) {
3044            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3045            return BAD_VALUE;
3046        }
3047
3048        // open outputs for matching profiles if needed. Direct outputs are also opened to
3049        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3050        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3051            sp<IOProfile> profile = profiles[profile_index];
3052
3053            // nothing to do if one output is already opened for this profile
3054            size_t j;
3055            for (j = 0; j < outputs.size(); j++) {
3056                desc = mOutputs.valueFor(outputs.itemAt(j));
3057                if (!desc->isDuplicated() && desc->mProfile == profile) {
3058                    // matching profile: save the sample rates, format and channel masks supported
3059                    // by the profile in our device descriptor
3060                    devDesc->importAudioPort(profile);
3061                    break;
3062                }
3063            }
3064            if (j != outputs.size()) {
3065                continue;
3066            }
3067
3068            ALOGV("opening output for device %08x with params %s profile %p",
3069                                                      device, address.string(), profile.get());
3070            desc = new AudioOutputDescriptor(profile);
3071            desc->mDevice = device;
3072            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3073            config.sample_rate = desc->mSamplingRate;
3074            config.channel_mask = desc->mChannelMask;
3075            config.format = desc->mFormat;
3076            config.offload_info.sample_rate = desc->mSamplingRate;
3077            config.offload_info.channel_mask = desc->mChannelMask;
3078            config.offload_info.format = desc->mFormat;
3079            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3080            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3081                                                            &output,
3082                                                            &config,
3083                                                            &desc->mDevice,
3084                                                            address,
3085                                                            &desc->mLatency,
3086                                                            desc->mFlags);
3087            if (status == NO_ERROR) {
3088                desc->mSamplingRate = config.sample_rate;
3089                desc->mChannelMask = config.channel_mask;
3090                desc->mFormat = config.format;
3091
3092                // Here is where the out_set_parameters() for card & device gets called
3093                if (!address.isEmpty()) {
3094                    char *param = audio_device_address_to_parameter(device, address);
3095                    mpClientInterface->setParameters(output, String8(param));
3096                    free(param);
3097                }
3098
3099                // Here is where we step through and resolve any "dynamic" fields
3100                String8 reply;
3101                char *value;
3102                if (profile->mSamplingRates[0] == 0) {
3103                    reply = mpClientInterface->getParameters(output,
3104                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3105                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3106                              reply.string());
3107                    value = strpbrk((char *)reply.string(), "=");
3108                    if (value != NULL) {
3109                        profile->loadSamplingRates(value + 1);
3110                    }
3111                }
3112                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3113                    reply = mpClientInterface->getParameters(output,
3114                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3115                    ALOGV("checkOutputsForDevice() supported formats %s",
3116                              reply.string());
3117                    value = strpbrk((char *)reply.string(), "=");
3118                    if (value != NULL) {
3119                        profile->loadFormats(value + 1);
3120                    }
3121                }
3122                if (profile->mChannelMasks[0] == 0) {
3123                    reply = mpClientInterface->getParameters(output,
3124                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3125                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3126                              reply.string());
3127                    value = strpbrk((char *)reply.string(), "=");
3128                    if (value != NULL) {
3129                        profile->loadOutChannels(value + 1);
3130                    }
3131                }
3132                if (((profile->mSamplingRates[0] == 0) &&
3133                         (profile->mSamplingRates.size() < 2)) ||
3134                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3135                         (profile->mFormats.size() < 2)) ||
3136                     ((profile->mChannelMasks[0] == 0) &&
3137                         (profile->mChannelMasks.size() < 2))) {
3138                    ALOGW("checkOutputsForDevice() missing param");
3139                    mpClientInterface->closeOutput(output);
3140                    output = AUDIO_IO_HANDLE_NONE;
3141                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3142                            profile->mChannelMasks[0] == 0) {
3143                    mpClientInterface->closeOutput(output);
3144                    config.sample_rate = profile->pickSamplingRate();
3145                    config.channel_mask = profile->pickChannelMask();
3146                    config.format = profile->pickFormat();
3147                    config.offload_info.sample_rate = config.sample_rate;
3148                    config.offload_info.channel_mask = config.channel_mask;
3149                    config.offload_info.format = config.format;
3150                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3151                                                           &output,
3152                                                           &config,
3153                                                           &desc->mDevice,
3154                                                           address,
3155                                                           &desc->mLatency,
3156                                                           desc->mFlags);
3157                    if (status == NO_ERROR) {
3158                        desc->mSamplingRate = config.sample_rate;
3159                        desc->mChannelMask = config.channel_mask;
3160                        desc->mFormat = config.format;
3161                    } else {
3162                        output = AUDIO_IO_HANDLE_NONE;
3163                    }
3164                }
3165
3166                if (output != AUDIO_IO_HANDLE_NONE) {
3167                    addOutput(output, desc);
3168                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3169                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3170
3171                        // set initial stream volume for device
3172                        applyStreamVolumes(output, device, 0, true);
3173
3174                        //TODO: configure audio effect output stage here
3175
3176                        // open a duplicating output thread for the new output and the primary output
3177                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3178                                                                                  mPrimaryOutput);
3179                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3180                            // add duplicated output descriptor
3181                            sp<AudioOutputDescriptor> dupOutputDesc =
3182                                    new AudioOutputDescriptor(NULL);
3183                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3184                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3185                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3186                            dupOutputDesc->mFormat = desc->mFormat;
3187                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3188                            dupOutputDesc->mLatency = desc->mLatency;
3189                            addOutput(duplicatedOutput, dupOutputDesc);
3190                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3191                        } else {
3192                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3193                                    mPrimaryOutput, output);
3194                            mpClientInterface->closeOutput(output);
3195                            mOutputs.removeItem(output);
3196                            nextAudioPortGeneration();
3197                            output = AUDIO_IO_HANDLE_NONE;
3198                        }
3199                    }
3200                }
3201            } else {
3202                output = AUDIO_IO_HANDLE_NONE;
3203            }
3204            if (output == AUDIO_IO_HANDLE_NONE) {
3205                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3206                profiles.removeAt(profile_index);
3207                profile_index--;
3208            } else {
3209                outputs.add(output);
3210                devDesc->importAudioPort(profile);
3211
3212                if (deviceDistinguishesOnAddress(device)) {
3213                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3214                            device, address.string());
3215                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3216                            NULL/*patch handle*/, address.string());
3217                }
3218                ALOGV("checkOutputsForDevice(): adding output %d", output);
3219            }
3220        }
3221
3222        if (profiles.isEmpty()) {
3223            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3224            return BAD_VALUE;
3225        }
3226    } else { // Disconnect
3227        // check if one opened output is not needed any more after disconnecting one device
3228        for (size_t i = 0; i < mOutputs.size(); i++) {
3229            desc = mOutputs.valueAt(i);
3230            if (!desc->isDuplicated()) {
3231                if  (!(desc->mProfile->mSupportedDevices.types()
3232                        & mAvailableOutputDevices.types())) {
3233                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3234                            mOutputs.keyAt(i));
3235                    outputs.add(mOutputs.keyAt(i));
3236                } else if (deviceDistinguishesOnAddress(device) &&
3237                        // exact match on device
3238                        (desc->mProfile->mSupportedDevices.types() == device)) {
3239                    findIoHandlesByAddress(desc, address, outputs);
3240                }
3241            }
3242        }
3243        // Clear any profiles associated with the disconnected device.
3244        for (size_t i = 0; i < mHwModules.size(); i++)
3245        {
3246            if (mHwModules[i]->mHandle == 0) {
3247                continue;
3248            }
3249            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3250            {
3251                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3252                if (profile->mSupportedDevices.types() & device) {
3253                    ALOGV("checkOutputsForDevice(): "
3254                            "clearing direct output profile %zu on module %zu", j, i);
3255                    if (profile->mSamplingRates[0] == 0) {
3256                        profile->mSamplingRates.clear();
3257                        profile->mSamplingRates.add(0);
3258                    }
3259                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3260                        profile->mFormats.clear();
3261                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3262                    }
3263                    if (profile->mChannelMasks[0] == 0) {
3264                        profile->mChannelMasks.clear();
3265                        profile->mChannelMasks.add(0);
3266                    }
3267                }
3268            }
3269        }
3270    }
3271    return NO_ERROR;
3272}
3273
3274status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3275                                                      audio_policy_dev_state_t state,
3276                                                      SortedVector<audio_io_handle_t>& inputs,
3277                                                      const String8 address)
3278{
3279    sp<AudioInputDescriptor> desc;
3280    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3281        // first list already open inputs that can be routed to this device
3282        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3283            desc = mInputs.valueAt(input_index);
3284            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3285                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3286               inputs.add(mInputs.keyAt(input_index));
3287            }
3288        }
3289
3290        // then look for input profiles that can be routed to this device
3291        SortedVector< sp<IOProfile> > profiles;
3292        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3293        {
3294            if (mHwModules[module_idx]->mHandle == 0) {
3295                continue;
3296            }
3297            for (size_t profile_index = 0;
3298                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3299                 profile_index++)
3300            {
3301                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3302                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3303                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3304                          profile_index, module_idx);
3305                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3306                }
3307            }
3308        }
3309
3310        if (profiles.isEmpty() && inputs.isEmpty()) {
3311            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3312            return BAD_VALUE;
3313        }
3314
3315        // open inputs for matching profiles if needed. Direct inputs are also opened to
3316        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3317        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3318
3319            sp<IOProfile> profile = profiles[profile_index];
3320            // nothing to do if one input is already opened for this profile
3321            size_t input_index;
3322            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3323                desc = mInputs.valueAt(input_index);
3324                if (desc->mProfile == profile) {
3325                    break;
3326                }
3327            }
3328            if (input_index != mInputs.size()) {
3329                continue;
3330            }
3331
3332            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3333            desc = new AudioInputDescriptor(profile);
3334            desc->mDevice = device;
3335            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3336            config.sample_rate = desc->mSamplingRate;
3337            config.channel_mask = desc->mChannelMask;
3338            config.format = desc->mFormat;
3339            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3340            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3341                                                           &input,
3342                                                           &config,
3343                                                           &desc->mDevice,
3344                                                           address,
3345                                                           AUDIO_SOURCE_MIC,
3346                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3347
3348            if (status == NO_ERROR) {
3349                desc->mSamplingRate = config.sample_rate;
3350                desc->mChannelMask = config.channel_mask;
3351                desc->mFormat = config.format;
3352
3353                if (!address.isEmpty()) {
3354                    char *param = audio_device_address_to_parameter(device, address);
3355                    mpClientInterface->setParameters(input, String8(param));
3356                    free(param);
3357                }
3358
3359                // Here is where we step through and resolve any "dynamic" fields
3360                String8 reply;
3361                char *value;
3362                if (profile->mSamplingRates[0] == 0) {
3363                    reply = mpClientInterface->getParameters(input,
3364                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3365                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3366                              reply.string());
3367                    value = strpbrk((char *)reply.string(), "=");
3368                    if (value != NULL) {
3369                        profile->loadSamplingRates(value + 1);
3370                    }
3371                }
3372                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3373                    reply = mpClientInterface->getParameters(input,
3374                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3375                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3376                    value = strpbrk((char *)reply.string(), "=");
3377                    if (value != NULL) {
3378                        profile->loadFormats(value + 1);
3379                    }
3380                }
3381                if (profile->mChannelMasks[0] == 0) {
3382                    reply = mpClientInterface->getParameters(input,
3383                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3384                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3385                              reply.string());
3386                    value = strpbrk((char *)reply.string(), "=");
3387                    if (value != NULL) {
3388                        profile->loadInChannels(value + 1);
3389                    }
3390                }
3391                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3392                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3393                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3394                    ALOGW("checkInputsForDevice() direct input missing param");
3395                    mpClientInterface->closeInput(input);
3396                    input = AUDIO_IO_HANDLE_NONE;
3397                }
3398
3399                if (input != 0) {
3400                    addInput(input, desc);
3401                }
3402            } // endif input != 0
3403
3404            if (input == AUDIO_IO_HANDLE_NONE) {
3405                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3406                profiles.removeAt(profile_index);
3407                profile_index--;
3408            } else {
3409                inputs.add(input);
3410                ALOGV("checkInputsForDevice(): adding input %d", input);
3411            }
3412        } // end scan profiles
3413
3414        if (profiles.isEmpty()) {
3415            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3416            return BAD_VALUE;
3417        }
3418    } else {
3419        // Disconnect
3420        // check if one opened input is not needed any more after disconnecting one device
3421        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3422            desc = mInputs.valueAt(input_index);
3423            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3424                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3425                      mInputs.keyAt(input_index));
3426                inputs.add(mInputs.keyAt(input_index));
3427            }
3428        }
3429        // Clear any profiles associated with the disconnected device.
3430        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3431            if (mHwModules[module_index]->mHandle == 0) {
3432                continue;
3433            }
3434            for (size_t profile_index = 0;
3435                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3436                 profile_index++) {
3437                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3438                if (profile->mSupportedDevices.types() & device) {
3439                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3440                          profile_index, module_index);
3441                    if (profile->mSamplingRates[0] == 0) {
3442                        profile->mSamplingRates.clear();
3443                        profile->mSamplingRates.add(0);
3444                    }
3445                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3446                        profile->mFormats.clear();
3447                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3448                    }
3449                    if (profile->mChannelMasks[0] == 0) {
3450                        profile->mChannelMasks.clear();
3451                        profile->mChannelMasks.add(0);
3452                    }
3453                }
3454            }
3455        }
3456    } // end disconnect
3457
3458    return NO_ERROR;
3459}
3460
3461
3462void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3463{
3464    ALOGV("closeOutput(%d)", output);
3465
3466    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3467    if (outputDesc == NULL) {
3468        ALOGW("closeOutput() unknown output %d", output);
3469        return;
3470    }
3471
3472    // look for duplicated outputs connected to the output being removed.
3473    for (size_t i = 0; i < mOutputs.size(); i++) {
3474        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3475        if (dupOutputDesc->isDuplicated() &&
3476                (dupOutputDesc->mOutput1 == outputDesc ||
3477                dupOutputDesc->mOutput2 == outputDesc)) {
3478            sp<AudioOutputDescriptor> outputDesc2;
3479            if (dupOutputDesc->mOutput1 == outputDesc) {
3480                outputDesc2 = dupOutputDesc->mOutput2;
3481            } else {
3482                outputDesc2 = dupOutputDesc->mOutput1;
3483            }
3484            // As all active tracks on duplicated output will be deleted,
3485            // and as they were also referenced on the other output, the reference
3486            // count for their stream type must be adjusted accordingly on
3487            // the other output.
3488            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3489                int refCount = dupOutputDesc->mRefCount[j];
3490                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3491            }
3492            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3493            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3494
3495            mpClientInterface->closeOutput(duplicatedOutput);
3496            mOutputs.removeItem(duplicatedOutput);
3497        }
3498    }
3499
3500    AudioParameter param;
3501    param.add(String8("closing"), String8("true"));
3502    mpClientInterface->setParameters(output, param.toString());
3503
3504    mpClientInterface->closeOutput(output);
3505    mOutputs.removeItem(output);
3506    mPreviousOutputs = mOutputs;
3507    nextAudioPortGeneration();
3508}
3509
3510SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3511                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3512{
3513    SortedVector<audio_io_handle_t> outputs;
3514
3515    ALOGVV("getOutputsForDevice() device %04x", device);
3516    for (size_t i = 0; i < openOutputs.size(); i++) {
3517        ALOGVV("output %d isDuplicated=%d device=%04x",
3518                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3519        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3520            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3521            outputs.add(openOutputs.keyAt(i));
3522        }
3523    }
3524    return outputs;
3525}
3526
3527bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3528                                   SortedVector<audio_io_handle_t>& outputs2)
3529{
3530    if (outputs1.size() != outputs2.size()) {
3531        return false;
3532    }
3533    for (size_t i = 0; i < outputs1.size(); i++) {
3534        if (outputs1[i] != outputs2[i]) {
3535            return false;
3536        }
3537    }
3538    return true;
3539}
3540
3541void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3542{
3543    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3544    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3545    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3546    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3547
3548    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3549        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3550              strategy, srcOutputs[0], dstOutputs[0]);
3551        // mute strategy while moving tracks from one output to another
3552        for (size_t i = 0; i < srcOutputs.size(); i++) {
3553            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3554            if (desc->isStrategyActive(strategy)) {
3555                setStrategyMute(strategy, true, srcOutputs[i]);
3556                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3557            }
3558        }
3559
3560        // Move effects associated to this strategy from previous output to new output
3561        if (strategy == STRATEGY_MEDIA) {
3562            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3563            SortedVector<audio_io_handle_t> moved;
3564            for (size_t i = 0; i < mEffects.size(); i++) {
3565                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3566                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3567                        effectDesc->mIo != fxOutput) {
3568                    if (moved.indexOf(effectDesc->mIo) < 0) {
3569                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3570                              mEffects.keyAt(i), fxOutput);
3571                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3572                                                       fxOutput);
3573                        moved.add(effectDesc->mIo);
3574                    }
3575                    effectDesc->mIo = fxOutput;
3576                }
3577            }
3578        }
3579        // Move tracks associated to this strategy from previous output to new output
3580        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3581            if (getStrategy((audio_stream_type_t)i) == strategy) {
3582                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3583            }
3584        }
3585    }
3586}
3587
3588void AudioPolicyManager::checkOutputForAllStrategies()
3589{
3590    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3591    checkOutputForStrategy(STRATEGY_PHONE);
3592    checkOutputForStrategy(STRATEGY_SONIFICATION);
3593    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3594    checkOutputForStrategy(STRATEGY_MEDIA);
3595    checkOutputForStrategy(STRATEGY_DTMF);
3596}
3597
3598audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3599{
3600    for (size_t i = 0; i < mOutputs.size(); i++) {
3601        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3602        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3603            return mOutputs.keyAt(i);
3604        }
3605    }
3606
3607    return 0;
3608}
3609
3610void AudioPolicyManager::checkA2dpSuspend()
3611{
3612    audio_io_handle_t a2dpOutput = getA2dpOutput();
3613    if (a2dpOutput == 0) {
3614        mA2dpSuspended = false;
3615        return;
3616    }
3617
3618    bool isScoConnected =
3619            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3620    // suspend A2DP output if:
3621    //      (NOT already suspended) &&
3622    //      ((SCO device is connected &&
3623    //       (forced usage for communication || for record is SCO))) ||
3624    //      (phone state is ringing || in call)
3625    //
3626    // restore A2DP output if:
3627    //      (Already suspended) &&
3628    //      ((SCO device is NOT connected ||
3629    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3630    //      (phone state is NOT ringing && NOT in call)
3631    //
3632    if (mA2dpSuspended) {
3633        if ((!isScoConnected ||
3634             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3635              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3636             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3637              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3638
3639            mpClientInterface->restoreOutput(a2dpOutput);
3640            mA2dpSuspended = false;
3641        }
3642    } else {
3643        if ((isScoConnected &&
3644             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3645              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3646             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3647              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3648
3649            mpClientInterface->suspendOutput(a2dpOutput);
3650            mA2dpSuspended = true;
3651        }
3652    }
3653}
3654
3655audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3656{
3657    audio_devices_t device = AUDIO_DEVICE_NONE;
3658
3659    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3660
3661    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3662    if (index >= 0) {
3663        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3664        if (patchDesc->mUid != mUidCached) {
3665            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3666                  outputDesc->device(), outputDesc->mPatchHandle);
3667            return outputDesc->device();
3668        }
3669    }
3670
3671    // check the following by order of priority to request a routing change if necessary:
3672    // 1: the strategy enforced audible is active on the output:
3673    //      use device for strategy enforced audible
3674    // 2: we are in call or the strategy phone is active on the output:
3675    //      use device for strategy phone
3676    // 3: the strategy sonification is active on the output:
3677    //      use device for strategy sonification
3678    // 4: the strategy "respectful" sonification is active on the output:
3679    //      use device for strategy "respectful" sonification
3680    // 5: the strategy media is active on the output:
3681    //      use device for strategy media
3682    // 6: the strategy DTMF is active on the output:
3683    //      use device for strategy DTMF
3684    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3685        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3686    } else if (isInCall() ||
3687                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3688        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3689    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3690        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3691    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3692        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3693    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3694        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3695    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3696        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3697    }
3698
3699    ALOGV("getNewOutputDevice() selected device %x", device);
3700    return device;
3701}
3702
3703audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3704{
3705    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3706
3707    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3708    if (index >= 0) {
3709        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3710        if (patchDesc->mUid != mUidCached) {
3711            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3712                  inputDesc->mDevice, inputDesc->mPatchHandle);
3713            return inputDesc->mDevice;
3714        }
3715    }
3716
3717    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3718
3719    ALOGV("getNewInputDevice() selected device %x", device);
3720    return device;
3721}
3722
3723uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3724    return (uint32_t)getStrategy(stream);
3725}
3726
3727audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3728    // By checking the range of stream before calling getStrategy, we avoid
3729    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3730    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3731    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3732        return AUDIO_DEVICE_NONE;
3733    }
3734    audio_devices_t devices;
3735    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3736    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3737    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3738    for (size_t i = 0; i < outputs.size(); i++) {
3739        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3740        if (outputDesc->isStrategyActive(strategy)) {
3741            devices = outputDesc->device();
3742            break;
3743        }
3744    }
3745    return devices;
3746}
3747
3748AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3749        audio_stream_type_t stream) {
3750    // stream to strategy mapping
3751    switch (stream) {
3752    case AUDIO_STREAM_VOICE_CALL:
3753    case AUDIO_STREAM_BLUETOOTH_SCO:
3754        return STRATEGY_PHONE;
3755    case AUDIO_STREAM_RING:
3756    case AUDIO_STREAM_ALARM:
3757        return STRATEGY_SONIFICATION;
3758    case AUDIO_STREAM_NOTIFICATION:
3759        return STRATEGY_SONIFICATION_RESPECTFUL;
3760    case AUDIO_STREAM_DTMF:
3761        return STRATEGY_DTMF;
3762    default:
3763        ALOGE("unknown stream type");
3764    case AUDIO_STREAM_SYSTEM:
3765        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3766        // while key clicks are played produces a poor result
3767    case AUDIO_STREAM_TTS:
3768    case AUDIO_STREAM_MUSIC:
3769        return STRATEGY_MEDIA;
3770    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3771        return STRATEGY_ENFORCED_AUDIBLE;
3772    }
3773}
3774
3775uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3776    // flags to strategy mapping
3777    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3778        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3779    }
3780
3781    // usage to strategy mapping
3782    switch (attr->usage) {
3783    case AUDIO_USAGE_MEDIA:
3784    case AUDIO_USAGE_GAME:
3785    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3786    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3787    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3788        return (uint32_t) STRATEGY_MEDIA;
3789
3790    case AUDIO_USAGE_VOICE_COMMUNICATION:
3791        return (uint32_t) STRATEGY_PHONE;
3792
3793    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3794        return (uint32_t) STRATEGY_DTMF;
3795
3796    case AUDIO_USAGE_ALARM:
3797    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3798        return (uint32_t) STRATEGY_SONIFICATION;
3799
3800    case AUDIO_USAGE_NOTIFICATION:
3801    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3802    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3803    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3804    case AUDIO_USAGE_NOTIFICATION_EVENT:
3805        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3806
3807    case AUDIO_USAGE_UNKNOWN:
3808    default:
3809        return (uint32_t) STRATEGY_MEDIA;
3810    }
3811}
3812
3813void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3814    switch(stream) {
3815    case AUDIO_STREAM_MUSIC:
3816        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3817        updateDevicesAndOutputs();
3818        break;
3819    default:
3820        break;
3821    }
3822}
3823
3824audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3825                                                             bool fromCache)
3826{
3827    uint32_t device = AUDIO_DEVICE_NONE;
3828
3829    if (fromCache) {
3830        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3831              strategy, mDeviceForStrategy[strategy]);
3832        return mDeviceForStrategy[strategy];
3833    }
3834    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3835    switch (strategy) {
3836
3837    case STRATEGY_SONIFICATION_RESPECTFUL:
3838        if (isInCall()) {
3839            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3840        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3841                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3842            // while media is playing on a remote device, use the the sonification behavior.
3843            // Note that we test this usecase before testing if media is playing because
3844            //   the isStreamActive() method only informs about the activity of a stream, not
3845            //   if it's for local playback. Note also that we use the same delay between both tests
3846            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3847        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3848            // while media is playing (or has recently played), use the same device
3849            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3850        } else {
3851            // when media is not playing anymore, fall back on the sonification behavior
3852            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3853        }
3854
3855        break;
3856
3857    case STRATEGY_DTMF:
3858        if (!isInCall()) {
3859            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3860            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3861            break;
3862        }
3863        // when in call, DTMF and PHONE strategies follow the same rules
3864        // FALL THROUGH
3865
3866    case STRATEGY_PHONE:
3867        // Force use of only devices on primary output if:
3868        // - in call AND
3869        //   - cannot route from voice call RX OR
3870        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
3871        if (mPhoneState == AUDIO_MODE_IN_CALL) {
3872            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
3873            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
3874            if (((mAvailableInputDevices.types() &
3875                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
3876                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
3877                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
3878                             AUDIO_DEVICE_API_VERSION_3_0))) {
3879                availableOutputDeviceTypes = availablePrimaryOutputDevices();
3880            }
3881        }
3882        // for phone strategy, we first consider the forced use and then the available devices by order
3883        // of priority
3884        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3885        case AUDIO_POLICY_FORCE_BT_SCO:
3886            if (!isInCall() || strategy != STRATEGY_DTMF) {
3887                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3888                if (device) break;
3889            }
3890            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3891            if (device) break;
3892            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3893            if (device) break;
3894            // if SCO device is requested but no SCO device is available, fall back to default case
3895            // FALL THROUGH
3896
3897        default:    // FORCE_NONE
3898            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3899            if (!isInCall() &&
3900                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3901                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3902                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3903                if (device) break;
3904                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3905                if (device) break;
3906            }
3907            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3908            if (device) break;
3909            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3910            if (device) break;
3911            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3912            if (device) break;
3913            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3914                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3915                if (device) break;
3916                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3917                if (device) break;
3918                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3919                if (device) break;
3920                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3921                if (device) break;
3922            }
3923            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3924            if (device) break;
3925            device = mDefaultOutputDevice->mDeviceType;
3926            if (device == AUDIO_DEVICE_NONE) {
3927                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3928            }
3929            break;
3930
3931        case AUDIO_POLICY_FORCE_SPEAKER:
3932            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3933            // A2DP speaker when forcing to speaker output
3934            if (!isInCall() &&
3935                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3936                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3937                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3938                if (device) break;
3939            }
3940            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3941                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3942                if (device) break;
3943                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3944                if (device) break;
3945                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3946                if (device) break;
3947                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3948                if (device) break;
3949                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3950                if (device) break;
3951            }
3952            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
3953            if (device) break;
3954            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3955            if (device) break;
3956            device = mDefaultOutputDevice->mDeviceType;
3957            if (device == AUDIO_DEVICE_NONE) {
3958                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
3959            }
3960            break;
3961        }
3962    break;
3963
3964    case STRATEGY_SONIFICATION:
3965
3966        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
3967        // handleIncallSonification().
3968        if (isInCall()) {
3969            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
3970            break;
3971        }
3972        // FALL THROUGH
3973
3974    case STRATEGY_ENFORCED_AUDIBLE:
3975        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
3976        // except:
3977        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
3978        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
3979
3980        if ((strategy == STRATEGY_SONIFICATION) ||
3981                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
3982            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3983            if (device == AUDIO_DEVICE_NONE) {
3984                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
3985            }
3986        }
3987        // The second device used for sonification is the same as the device used by media strategy
3988        // FALL THROUGH
3989
3990    case STRATEGY_MEDIA: {
3991        uint32_t device2 = AUDIO_DEVICE_NONE;
3992        if (strategy != STRATEGY_SONIFICATION) {
3993            // no sonification on remote submix (e.g. WFD)
3994            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
3995        }
3996        if ((device2 == AUDIO_DEVICE_NONE) &&
3997                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3998                (getA2dpOutput() != 0) && !mA2dpSuspended) {
3999            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4000            if (device2 == AUDIO_DEVICE_NONE) {
4001                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4002            }
4003            if (device2 == AUDIO_DEVICE_NONE) {
4004                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4005            }
4006        }
4007        if (device2 == AUDIO_DEVICE_NONE) {
4008            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4009        }
4010        if ((device2 == AUDIO_DEVICE_NONE)) {
4011            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4012        }
4013        if (device2 == AUDIO_DEVICE_NONE) {
4014            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4015        }
4016        if (device2 == AUDIO_DEVICE_NONE) {
4017            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4018        }
4019        if (device2 == AUDIO_DEVICE_NONE) {
4020            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4021        }
4022        if (device2 == AUDIO_DEVICE_NONE) {
4023            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4024        }
4025        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4026            // no sonification on aux digital (e.g. HDMI)
4027            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4028        }
4029        if ((device2 == AUDIO_DEVICE_NONE) &&
4030                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4031            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4032        }
4033        if (device2 == AUDIO_DEVICE_NONE) {
4034            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4035        }
4036        int device3 = AUDIO_DEVICE_NONE;
4037        if (strategy == STRATEGY_MEDIA) {
4038            // ARC, SPDIF and AUX_LINE can co-exist with others.
4039            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4040            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4041            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4042        }
4043
4044        device2 |= device3;
4045        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4046        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4047        device |= device2;
4048
4049        // If hdmi system audio mode is on, remove speaker out of output list.
4050        if ((strategy == STRATEGY_MEDIA) &&
4051            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4052                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4053            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4054        }
4055
4056        if (device) break;
4057        device = mDefaultOutputDevice->mDeviceType;
4058        if (device == AUDIO_DEVICE_NONE) {
4059            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4060        }
4061        } break;
4062
4063    default:
4064        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4065        break;
4066    }
4067
4068    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4069    return device;
4070}
4071
4072void AudioPolicyManager::updateDevicesAndOutputs()
4073{
4074    for (int i = 0; i < NUM_STRATEGIES; i++) {
4075        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4076    }
4077    mPreviousOutputs = mOutputs;
4078}
4079
4080uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4081                                                       audio_devices_t prevDevice,
4082                                                       uint32_t delayMs)
4083{
4084    // mute/unmute strategies using an incompatible device combination
4085    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4086    // if unmuting, unmute only after the specified delay
4087    if (outputDesc->isDuplicated()) {
4088        return 0;
4089    }
4090
4091    uint32_t muteWaitMs = 0;
4092    audio_devices_t device = outputDesc->device();
4093    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4094
4095    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4096        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4097        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4098        bool doMute = false;
4099
4100        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4101            doMute = true;
4102            outputDesc->mStrategyMutedByDevice[i] = true;
4103        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4104            doMute = true;
4105            outputDesc->mStrategyMutedByDevice[i] = false;
4106        }
4107        if (doMute) {
4108            for (size_t j = 0; j < mOutputs.size(); j++) {
4109                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4110                // skip output if it does not share any device with current output
4111                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4112                        == AUDIO_DEVICE_NONE) {
4113                    continue;
4114                }
4115                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4116                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4117                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4118                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4119                if (desc->isStrategyActive((routing_strategy)i)) {
4120                    if (mute) {
4121                        // FIXME: should not need to double latency if volume could be applied
4122                        // immediately by the audioflinger mixer. We must account for the delay
4123                        // between now and the next time the audioflinger thread for this output
4124                        // will process a buffer (which corresponds to one buffer size,
4125                        // usually 1/2 or 1/4 of the latency).
4126                        if (muteWaitMs < desc->latency() * 2) {
4127                            muteWaitMs = desc->latency() * 2;
4128                        }
4129                    }
4130                }
4131            }
4132        }
4133    }
4134
4135    // temporary mute output if device selection changes to avoid volume bursts due to
4136    // different per device volumes
4137    if (outputDesc->isActive() && (device != prevDevice)) {
4138        if (muteWaitMs < outputDesc->latency() * 2) {
4139            muteWaitMs = outputDesc->latency() * 2;
4140        }
4141        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4142            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4143                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4144                // do tempMute unmute after twice the mute wait time
4145                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4146                                muteWaitMs *2, device);
4147            }
4148        }
4149    }
4150
4151    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4152    if (muteWaitMs > delayMs) {
4153        muteWaitMs -= delayMs;
4154        usleep(muteWaitMs * 1000);
4155        return muteWaitMs;
4156    }
4157    return 0;
4158}
4159
4160uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4161                                             audio_devices_t device,
4162                                             bool force,
4163                                             int delayMs,
4164                                             audio_patch_handle_t *patchHandle,
4165                                             const char* address)
4166{
4167    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4168    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4169    AudioParameter param;
4170    uint32_t muteWaitMs;
4171
4172    if (outputDesc->isDuplicated()) {
4173        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4174        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4175        return muteWaitMs;
4176    }
4177    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4178    // output profile
4179    if ((device != AUDIO_DEVICE_NONE) &&
4180            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4181        return 0;
4182    }
4183
4184    // filter devices according to output selected
4185    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4186
4187    audio_devices_t prevDevice = outputDesc->mDevice;
4188
4189    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4190
4191    if (device != AUDIO_DEVICE_NONE) {
4192        outputDesc->mDevice = device;
4193    }
4194    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4195
4196    // Do not change the routing if:
4197    //  - the requested device is AUDIO_DEVICE_NONE
4198    //  - the requested device is the same as current device and force is not specified.
4199    // Doing this check here allows the caller to call setOutputDevice() without conditions
4200    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
4201        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
4202        return muteWaitMs;
4203    }
4204
4205    ALOGV("setOutputDevice() changing device");
4206
4207    // do the routing
4208    if (device == AUDIO_DEVICE_NONE) {
4209        resetOutputDevice(output, delayMs, NULL);
4210    } else {
4211        DeviceVector deviceList = (address == NULL) ?
4212                mAvailableOutputDevices.getDevicesFromType(device)
4213                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4214        if (!deviceList.isEmpty()) {
4215            struct audio_patch patch;
4216            outputDesc->toAudioPortConfig(&patch.sources[0]);
4217            patch.num_sources = 1;
4218            patch.num_sinks = 0;
4219            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4220                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4221                patch.num_sinks++;
4222            }
4223            ssize_t index;
4224            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4225                index = mAudioPatches.indexOfKey(*patchHandle);
4226            } else {
4227                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4228            }
4229            sp< AudioPatch> patchDesc;
4230            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4231            if (index >= 0) {
4232                patchDesc = mAudioPatches.valueAt(index);
4233                afPatchHandle = patchDesc->mAfPatchHandle;
4234            }
4235
4236            status_t status = mpClientInterface->createAudioPatch(&patch,
4237                                                                   &afPatchHandle,
4238                                                                   delayMs);
4239            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4240                    "num_sources %d num_sinks %d",
4241                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4242            if (status == NO_ERROR) {
4243                if (index < 0) {
4244                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4245                                               &patch, mUidCached);
4246                    addAudioPatch(patchDesc->mHandle, patchDesc);
4247                } else {
4248                    patchDesc->mPatch = patch;
4249                }
4250                patchDesc->mAfPatchHandle = afPatchHandle;
4251                patchDesc->mUid = mUidCached;
4252                if (patchHandle) {
4253                    *patchHandle = patchDesc->mHandle;
4254                }
4255                outputDesc->mPatchHandle = patchDesc->mHandle;
4256                nextAudioPortGeneration();
4257                mpClientInterface->onAudioPatchListUpdate();
4258            }
4259        }
4260    }
4261
4262    // update stream volumes according to new device
4263    applyStreamVolumes(output, device, delayMs);
4264
4265    return muteWaitMs;
4266}
4267
4268status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4269                                               int delayMs,
4270                                               audio_patch_handle_t *patchHandle)
4271{
4272    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4273    ssize_t index;
4274    if (patchHandle) {
4275        index = mAudioPatches.indexOfKey(*patchHandle);
4276    } else {
4277        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4278    }
4279    if (index < 0) {
4280        return INVALID_OPERATION;
4281    }
4282    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4283    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4284    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4285    outputDesc->mPatchHandle = 0;
4286    removeAudioPatch(patchDesc->mHandle);
4287    nextAudioPortGeneration();
4288    mpClientInterface->onAudioPatchListUpdate();
4289    return status;
4290}
4291
4292status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4293                                            audio_devices_t device,
4294                                            bool force,
4295                                            audio_patch_handle_t *patchHandle)
4296{
4297    status_t status = NO_ERROR;
4298
4299    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4300    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4301        inputDesc->mDevice = device;
4302
4303        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4304        if (!deviceList.isEmpty()) {
4305            struct audio_patch patch;
4306            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4307            // AUDIO_SOURCE_HOTWORD is for internal use only:
4308            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4309            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4310                    !inputDesc->mIsSoundTrigger) {
4311                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4312            }
4313            patch.num_sinks = 1;
4314            //only one input device for now
4315            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4316            patch.num_sources = 1;
4317            ssize_t index;
4318            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4319                index = mAudioPatches.indexOfKey(*patchHandle);
4320            } else {
4321                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4322            }
4323            sp< AudioPatch> patchDesc;
4324            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4325            if (index >= 0) {
4326                patchDesc = mAudioPatches.valueAt(index);
4327                afPatchHandle = patchDesc->mAfPatchHandle;
4328            }
4329
4330            status_t status = mpClientInterface->createAudioPatch(&patch,
4331                                                                  &afPatchHandle,
4332                                                                  0);
4333            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4334                                                                          status, afPatchHandle);
4335            if (status == NO_ERROR) {
4336                if (index < 0) {
4337                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4338                                               &patch, mUidCached);
4339                    addAudioPatch(patchDesc->mHandle, patchDesc);
4340                } else {
4341                    patchDesc->mPatch = patch;
4342                }
4343                patchDesc->mAfPatchHandle = afPatchHandle;
4344                patchDesc->mUid = mUidCached;
4345                if (patchHandle) {
4346                    *patchHandle = patchDesc->mHandle;
4347                }
4348                inputDesc->mPatchHandle = patchDesc->mHandle;
4349                nextAudioPortGeneration();
4350                mpClientInterface->onAudioPatchListUpdate();
4351            }
4352        }
4353    }
4354    return status;
4355}
4356
4357status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4358                                              audio_patch_handle_t *patchHandle)
4359{
4360    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4361    ssize_t index;
4362    if (patchHandle) {
4363        index = mAudioPatches.indexOfKey(*patchHandle);
4364    } else {
4365        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4366    }
4367    if (index < 0) {
4368        return INVALID_OPERATION;
4369    }
4370    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4371    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4372    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4373    inputDesc->mPatchHandle = 0;
4374    removeAudioPatch(patchDesc->mHandle);
4375    nextAudioPortGeneration();
4376    mpClientInterface->onAudioPatchListUpdate();
4377    return status;
4378}
4379
4380sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4381                                                   uint32_t& samplingRate,
4382                                                   audio_format_t format,
4383                                                   audio_channel_mask_t channelMask,
4384                                                   audio_input_flags_t flags)
4385{
4386    // Choose an input profile based on the requested capture parameters: select the first available
4387    // profile supporting all requested parameters.
4388
4389    for (size_t i = 0; i < mHwModules.size(); i++)
4390    {
4391        if (mHwModules[i]->mHandle == 0) {
4392            continue;
4393        }
4394        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4395        {
4396            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4397            // profile->log();
4398            if (profile->isCompatibleProfile(device, samplingRate,
4399                                             &samplingRate /*updatedSamplingRate*/,
4400                                             format, channelMask, (audio_output_flags_t) flags)) {
4401                return profile;
4402            }
4403        }
4404    }
4405    return NULL;
4406}
4407
4408audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4409{
4410    uint32_t device = AUDIO_DEVICE_NONE;
4411    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4412                                            ~AUDIO_DEVICE_BIT_IN;
4413    switch (inputSource) {
4414    case AUDIO_SOURCE_VOICE_UPLINK:
4415      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4416          device = AUDIO_DEVICE_IN_VOICE_CALL;
4417          break;
4418      }
4419      break;
4420
4421    case AUDIO_SOURCE_DEFAULT:
4422    case AUDIO_SOURCE_MIC:
4423    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4424        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4425    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4426        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4427    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4428        device = AUDIO_DEVICE_IN_USB_DEVICE;
4429    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4430        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4431    }
4432    break;
4433
4434    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4435        // Allow only use of devices on primary input if in call and HAL does not support routing
4436        // to voice call path.
4437        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4438                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4439            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4440        }
4441
4442        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4443        case AUDIO_POLICY_FORCE_BT_SCO:
4444            // if SCO device is requested but no SCO device is available, fall back to default case
4445            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4446                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4447                break;
4448            }
4449            // FALL THROUGH
4450
4451        default:    // FORCE_NONE
4452            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4453                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4454            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4455                device = AUDIO_DEVICE_IN_USB_DEVICE;
4456            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4457                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4458            }
4459            break;
4460
4461        case AUDIO_POLICY_FORCE_SPEAKER:
4462            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4463                device = AUDIO_DEVICE_IN_BACK_MIC;
4464            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4465                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4466            }
4467            break;
4468        }
4469        break;
4470
4471    case AUDIO_SOURCE_VOICE_RECOGNITION:
4472    case AUDIO_SOURCE_HOTWORD:
4473        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4474                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4475            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4476        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4477            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4478        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4479            device = AUDIO_DEVICE_IN_USB_DEVICE;
4480        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4481            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4482        }
4483        break;
4484    case AUDIO_SOURCE_CAMCORDER:
4485        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4486            device = AUDIO_DEVICE_IN_BACK_MIC;
4487        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4488            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4489        }
4490        break;
4491    case AUDIO_SOURCE_VOICE_DOWNLINK:
4492    case AUDIO_SOURCE_VOICE_CALL:
4493        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4494            device = AUDIO_DEVICE_IN_VOICE_CALL;
4495        }
4496        break;
4497    case AUDIO_SOURCE_REMOTE_SUBMIX:
4498        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4499            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4500        }
4501        break;
4502    default:
4503        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4504        break;
4505    }
4506    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4507    return device;
4508}
4509
4510bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4511{
4512    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4513        device &= ~AUDIO_DEVICE_BIT_IN;
4514        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4515            return true;
4516    }
4517    return false;
4518}
4519
4520bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4521    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4522}
4523
4524audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4525{
4526    for (size_t i = 0; i < mInputs.size(); i++) {
4527        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4528        if ((input_descriptor->mRefCount > 0)
4529                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4530            return mInputs.keyAt(i);
4531        }
4532    }
4533    return 0;
4534}
4535
4536uint32_t AudioPolicyManager::activeInputsCount() const
4537{
4538    uint32_t count = 0;
4539    for (size_t i = 0; i < mInputs.size(); i++) {
4540        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4541        if (desc->mRefCount > 0) {
4542            return count++;
4543        }
4544    }
4545    return count;
4546}
4547
4548
4549audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4550{
4551    if (device == AUDIO_DEVICE_NONE) {
4552        // this happens when forcing a route update and no track is active on an output.
4553        // In this case the returned category is not important.
4554        device =  AUDIO_DEVICE_OUT_SPEAKER;
4555    } else if (popcount(device) > 1) {
4556        // Multiple device selection is either:
4557        //  - speaker + one other device: give priority to speaker in this case.
4558        //  - one A2DP device + another device: happens with duplicated output. In this case
4559        // retain the device on the A2DP output as the other must not correspond to an active
4560        // selection if not the speaker.
4561        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4562            device = AUDIO_DEVICE_OUT_SPEAKER;
4563        } else {
4564            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4565        }
4566    }
4567
4568    ALOGW_IF(popcount(device) != 1,
4569            "getDeviceForVolume() invalid device combination: %08x",
4570            device);
4571
4572    return device;
4573}
4574
4575AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4576{
4577    switch(getDeviceForVolume(device)) {
4578        case AUDIO_DEVICE_OUT_EARPIECE:
4579            return DEVICE_CATEGORY_EARPIECE;
4580        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4581        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4582        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4583        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4584        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4585        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4586            return DEVICE_CATEGORY_HEADSET;
4587        case AUDIO_DEVICE_OUT_LINE:
4588        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4589        /*USB?  Remote submix?*/
4590            return DEVICE_CATEGORY_EXT_MEDIA;
4591        case AUDIO_DEVICE_OUT_SPEAKER:
4592        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4593        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4594        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4595        case AUDIO_DEVICE_OUT_USB_DEVICE:
4596        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4597        default:
4598            return DEVICE_CATEGORY_SPEAKER;
4599    }
4600}
4601
4602float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4603        int indexInUi)
4604{
4605    device_category deviceCategory = getDeviceCategory(device);
4606    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4607
4608    // the volume index in the UI is relative to the min and max volume indices for this stream type
4609    int nbSteps = 1 + curve[VOLMAX].mIndex -
4610            curve[VOLMIN].mIndex;
4611    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4612            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4613
4614    // find what part of the curve this index volume belongs to, or if it's out of bounds
4615    int segment = 0;
4616    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4617        return 0.0f;
4618    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4619        segment = 0;
4620    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4621        segment = 1;
4622    } else if (volIdx <= curve[VOLMAX].mIndex) {
4623        segment = 2;
4624    } else {                                                               // out of bounds
4625        return 1.0f;
4626    }
4627
4628    // linear interpolation in the attenuation table in dB
4629    float decibels = curve[segment].mDBAttenuation +
4630            ((float)(volIdx - curve[segment].mIndex)) *
4631                ( (curve[segment+1].mDBAttenuation -
4632                        curve[segment].mDBAttenuation) /
4633                    ((float)(curve[segment+1].mIndex -
4634                            curve[segment].mIndex)) );
4635
4636    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4637
4638    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4639            curve[segment].mIndex, volIdx,
4640            curve[segment+1].mIndex,
4641            curve[segment].mDBAttenuation,
4642            decibels,
4643            curve[segment+1].mDBAttenuation,
4644            amplification);
4645
4646    return amplification;
4647}
4648
4649const AudioPolicyManager::VolumeCurvePoint
4650    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4651    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4652};
4653
4654const AudioPolicyManager::VolumeCurvePoint
4655    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4656    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4657};
4658
4659const AudioPolicyManager::VolumeCurvePoint
4660    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4661    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
4662};
4663
4664const AudioPolicyManager::VolumeCurvePoint
4665    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4666    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4667};
4668
4669const AudioPolicyManager::VolumeCurvePoint
4670    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4671    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4672};
4673
4674const AudioPolicyManager::VolumeCurvePoint
4675    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4676    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4677};
4678
4679const AudioPolicyManager::VolumeCurvePoint
4680    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4681    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4682};
4683
4684// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4685// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4686// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4687// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4688
4689const AudioPolicyManager::VolumeCurvePoint
4690    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4691    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4692};
4693
4694const AudioPolicyManager::VolumeCurvePoint
4695    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4696    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4697};
4698
4699const AudioPolicyManager::VolumeCurvePoint
4700    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4701    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4702};
4703
4704const AudioPolicyManager::VolumeCurvePoint
4705    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4706    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4707};
4708
4709const AudioPolicyManager::VolumeCurvePoint
4710    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4711    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4712};
4713
4714const AudioPolicyManager::VolumeCurvePoint
4715            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4716                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4717    { // AUDIO_STREAM_VOICE_CALL
4718        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4719        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4720        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4721        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4722    },
4723    { // AUDIO_STREAM_SYSTEM
4724        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4725        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4726        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4727        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4728    },
4729    { // AUDIO_STREAM_RING
4730        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4731        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4732        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4733        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4734    },
4735    { // AUDIO_STREAM_MUSIC
4736        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4737        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4738        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4739        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4740    },
4741    { // AUDIO_STREAM_ALARM
4742        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4743        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4744        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4745        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4746    },
4747    { // AUDIO_STREAM_NOTIFICATION
4748        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4749        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4750        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4751        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4752    },
4753    { // AUDIO_STREAM_BLUETOOTH_SCO
4754        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4755        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4756        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4757        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4758    },
4759    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4760        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4761        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4762        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4763        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4764    },
4765    {  // AUDIO_STREAM_DTMF
4766        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4767        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4768        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4769        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4770    },
4771    { // AUDIO_STREAM_TTS
4772        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4773        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4774        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4775        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4776    },
4777};
4778
4779void AudioPolicyManager::initializeVolumeCurves()
4780{
4781    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4782        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4783            mStreams[i].mVolumeCurve[j] =
4784                    sVolumeProfiles[i][j];
4785        }
4786    }
4787
4788    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4789    if (mSpeakerDrcEnabled) {
4790        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4791                sDefaultSystemVolumeCurveDrc;
4792        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4793                sSpeakerSonificationVolumeCurveDrc;
4794        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4795                sSpeakerSonificationVolumeCurveDrc;
4796        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4797                sSpeakerSonificationVolumeCurveDrc;
4798        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4799                sSpeakerMediaVolumeCurveDrc;
4800    }
4801}
4802
4803float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4804                                            int index,
4805                                            audio_io_handle_t output,
4806                                            audio_devices_t device)
4807{
4808    float volume = 1.0;
4809    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4810    StreamDescriptor &streamDesc = mStreams[stream];
4811
4812    if (device == AUDIO_DEVICE_NONE) {
4813        device = outputDesc->device();
4814    }
4815
4816    volume = volIndexToAmpl(device, streamDesc, index);
4817
4818    // if a headset is connected, apply the following rules to ring tones and notifications
4819    // to avoid sound level bursts in user's ears:
4820    // - always attenuate ring tones and notifications volume by 6dB
4821    // - if music is playing, always limit the volume to current music volume,
4822    // with a minimum threshold at -36dB so that notification is always perceived.
4823    const routing_strategy stream_strategy = getStrategy(stream);
4824    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4825            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4826            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4827            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4828        ((stream_strategy == STRATEGY_SONIFICATION)
4829                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4830                || (stream == AUDIO_STREAM_SYSTEM)
4831                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4832                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4833        streamDesc.mCanBeMuted) {
4834        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4835        // when the phone is ringing we must consider that music could have been paused just before
4836        // by the music application and behave as if music was active if the last music track was
4837        // just stopped
4838        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4839                mLimitRingtoneVolume) {
4840            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4841            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4842                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4843                               output,
4844                               musicDevice);
4845            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4846                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4847            if (volume > minVol) {
4848                volume = minVol;
4849                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4850            }
4851        }
4852    }
4853
4854    return volume;
4855}
4856
4857status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4858                                                   int index,
4859                                                   audio_io_handle_t output,
4860                                                   audio_devices_t device,
4861                                                   int delayMs,
4862                                                   bool force)
4863{
4864
4865    // do not change actual stream volume if the stream is muted
4866    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4867        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4868              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4869        return NO_ERROR;
4870    }
4871
4872    // do not change in call volume if bluetooth is connected and vice versa
4873    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4874            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4875        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4876                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4877        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4878             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4879        return INVALID_OPERATION;
4880    }
4881
4882    float volume = computeVolume(stream, index, output, device);
4883    // We actually change the volume if:
4884    // - the float value returned by computeVolume() changed
4885    // - the force flag is set
4886    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4887            force) {
4888        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4889        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4890        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4891        // enabled
4892        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4893            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4894        }
4895        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4896    }
4897
4898    if (stream == AUDIO_STREAM_VOICE_CALL ||
4899        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4900        float voiceVolume;
4901        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4902        if (stream == AUDIO_STREAM_VOICE_CALL) {
4903            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4904        } else {
4905            voiceVolume = 1.0;
4906        }
4907
4908        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4909            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4910            mLastVoiceVolume = voiceVolume;
4911        }
4912    }
4913
4914    return NO_ERROR;
4915}
4916
4917void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4918                                                audio_devices_t device,
4919                                                int delayMs,
4920                                                bool force)
4921{
4922    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4923
4924    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4925        checkAndSetVolume((audio_stream_type_t)stream,
4926                          mStreams[stream].getVolumeIndex(device),
4927                          output,
4928                          device,
4929                          delayMs,
4930                          force);
4931    }
4932}
4933
4934void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4935                                             bool on,
4936                                             audio_io_handle_t output,
4937                                             int delayMs,
4938                                             audio_devices_t device)
4939{
4940    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
4941    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4942        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4943            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
4944        }
4945    }
4946}
4947
4948void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4949                                           bool on,
4950                                           audio_io_handle_t output,
4951                                           int delayMs,
4952                                           audio_devices_t device)
4953{
4954    StreamDescriptor &streamDesc = mStreams[stream];
4955    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4956    if (device == AUDIO_DEVICE_NONE) {
4957        device = outputDesc->device();
4958    }
4959
4960    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
4961          stream, on, output, outputDesc->mMuteCount[stream], device);
4962
4963    if (on) {
4964        if (outputDesc->mMuteCount[stream] == 0) {
4965            if (streamDesc.mCanBeMuted &&
4966                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4967                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
4968                checkAndSetVolume(stream, 0, output, device, delayMs);
4969            }
4970        }
4971        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
4972        outputDesc->mMuteCount[stream]++;
4973    } else {
4974        if (outputDesc->mMuteCount[stream] == 0) {
4975            ALOGV("setStreamMute() unmuting non muted stream!");
4976            return;
4977        }
4978        if (--outputDesc->mMuteCount[stream] == 0) {
4979            checkAndSetVolume(stream,
4980                              streamDesc.getVolumeIndex(device),
4981                              output,
4982                              device,
4983                              delayMs);
4984        }
4985    }
4986}
4987
4988void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
4989                                                      bool starting, bool stateChange)
4990{
4991    // if the stream pertains to sonification strategy and we are in call we must
4992    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
4993    // in the device used for phone strategy and play the tone if the selected device does not
4994    // interfere with the device used for phone strategy
4995    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
4996    // many times as there are active tracks on the output
4997    const routing_strategy stream_strategy = getStrategy(stream);
4998    if ((stream_strategy == STRATEGY_SONIFICATION) ||
4999            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5000        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5001        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5002                stream, starting, outputDesc->mDevice, stateChange);
5003        if (outputDesc->mRefCount[stream]) {
5004            int muteCount = 1;
5005            if (stateChange) {
5006                muteCount = outputDesc->mRefCount[stream];
5007            }
5008            if (audio_is_low_visibility(stream)) {
5009                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5010                for (int i = 0; i < muteCount; i++) {
5011                    setStreamMute(stream, starting, mPrimaryOutput);
5012                }
5013            } else {
5014                ALOGV("handleIncallSonification() high visibility");
5015                if (outputDesc->device() &
5016                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5017                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5018                    for (int i = 0; i < muteCount; i++) {
5019                        setStreamMute(stream, starting, mPrimaryOutput);
5020                    }
5021                }
5022                if (starting) {
5023                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5024                                                 AUDIO_STREAM_VOICE_CALL);
5025                } else {
5026                    mpClientInterface->stopTone();
5027                }
5028            }
5029        }
5030    }
5031}
5032
5033bool AudioPolicyManager::isInCall()
5034{
5035    return isStateInCall(mPhoneState);
5036}
5037
5038bool AudioPolicyManager::isStateInCall(int state) {
5039    return ((state == AUDIO_MODE_IN_CALL) ||
5040            (state == AUDIO_MODE_IN_COMMUNICATION));
5041}
5042
5043uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5044{
5045    return MAX_EFFECTS_CPU_LOAD;
5046}
5047
5048uint32_t AudioPolicyManager::getMaxEffectsMemory()
5049{
5050    return MAX_EFFECTS_MEMORY;
5051}
5052
5053
5054// --- AudioOutputDescriptor class implementation
5055
5056AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5057        const sp<IOProfile>& profile)
5058    : mId(0), mIoHandle(0), mLatency(0),
5059    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5060    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5061{
5062    // clear usage count for all stream types
5063    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5064        mRefCount[i] = 0;
5065        mCurVolume[i] = -1.0;
5066        mMuteCount[i] = 0;
5067        mStopTime[i] = 0;
5068    }
5069    for (int i = 0; i < NUM_STRATEGIES; i++) {
5070        mStrategyMutedByDevice[i] = false;
5071    }
5072    if (profile != NULL) {
5073        mFlags = profile->mFlags;
5074        mSamplingRate = profile->pickSamplingRate();
5075        mFormat = profile->pickFormat();
5076        mChannelMask = profile->pickChannelMask();
5077        if (profile->mGains.size() > 0) {
5078            profile->mGains[0]->getDefaultConfig(&mGain);
5079        }
5080    }
5081}
5082
5083audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5084{
5085    if (isDuplicated()) {
5086        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5087    } else {
5088        return mDevice;
5089    }
5090}
5091
5092uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5093{
5094    if (isDuplicated()) {
5095        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5096    } else {
5097        return mLatency;
5098    }
5099}
5100
5101bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5102        const sp<AudioOutputDescriptor> outputDesc)
5103{
5104    if (isDuplicated()) {
5105        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5106    } else if (outputDesc->isDuplicated()){
5107        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5108    } else {
5109        return (mProfile->mModule == outputDesc->mProfile->mModule);
5110    }
5111}
5112
5113void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5114                                                                   int delta)
5115{
5116    // forward usage count change to attached outputs
5117    if (isDuplicated()) {
5118        mOutput1->changeRefCount(stream, delta);
5119        mOutput2->changeRefCount(stream, delta);
5120    }
5121    if ((delta + (int)mRefCount[stream]) < 0) {
5122        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5123              delta, stream, mRefCount[stream]);
5124        mRefCount[stream] = 0;
5125        return;
5126    }
5127    mRefCount[stream] += delta;
5128    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5129}
5130
5131audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5132{
5133    if (isDuplicated()) {
5134        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5135    } else {
5136        return mProfile->mSupportedDevices.types() ;
5137    }
5138}
5139
5140bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5141{
5142    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5143}
5144
5145bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5146                                                                       uint32_t inPastMs,
5147                                                                       nsecs_t sysTime) const
5148{
5149    if ((sysTime == 0) && (inPastMs != 0)) {
5150        sysTime = systemTime();
5151    }
5152    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5153        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5154                (NUM_STRATEGIES == strategy)) &&
5155                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5156            return true;
5157        }
5158    }
5159    return false;
5160}
5161
5162bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5163                                                                       uint32_t inPastMs,
5164                                                                       nsecs_t sysTime) const
5165{
5166    if (mRefCount[stream] != 0) {
5167        return true;
5168    }
5169    if (inPastMs == 0) {
5170        return false;
5171    }
5172    if (sysTime == 0) {
5173        sysTime = systemTime();
5174    }
5175    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5176        return true;
5177    }
5178    return false;
5179}
5180
5181void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5182                                                 struct audio_port_config *dstConfig,
5183                                                 const struct audio_port_config *srcConfig) const
5184{
5185    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5186
5187    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5188                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5189    if (srcConfig != NULL) {
5190        dstConfig->config_mask |= srcConfig->config_mask;
5191    }
5192    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5193
5194    dstConfig->id = mId;
5195    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5196    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5197    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5198    dstConfig->ext.mix.handle = mIoHandle;
5199    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5200}
5201
5202void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5203                                                    struct audio_port *port) const
5204{
5205    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5206    mProfile->toAudioPort(port);
5207    port->id = mId;
5208    toAudioPortConfig(&port->active_config);
5209    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5210    port->ext.mix.handle = mIoHandle;
5211    port->ext.mix.latency_class =
5212            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5213}
5214
5215status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5216{
5217    const size_t SIZE = 256;
5218    char buffer[SIZE];
5219    String8 result;
5220
5221    snprintf(buffer, SIZE, " ID: %d\n", mId);
5222    result.append(buffer);
5223    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5224    result.append(buffer);
5225    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5226    result.append(buffer);
5227    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5228    result.append(buffer);
5229    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5230    result.append(buffer);
5231    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5232    result.append(buffer);
5233    snprintf(buffer, SIZE, " Devices %08x\n", device());
5234    result.append(buffer);
5235    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5236    result.append(buffer);
5237    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5238        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5239                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5240        result.append(buffer);
5241    }
5242    write(fd, result.string(), result.size());
5243
5244    return NO_ERROR;
5245}
5246
5247// --- AudioInputDescriptor class implementation
5248
5249AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5250    : mId(0), mIoHandle(0),
5251      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5252      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5253{
5254    if (profile != NULL) {
5255        mSamplingRate = profile->pickSamplingRate();
5256        mFormat = profile->pickFormat();
5257        mChannelMask = profile->pickChannelMask();
5258        if (profile->mGains.size() > 0) {
5259            profile->mGains[0]->getDefaultConfig(&mGain);
5260        }
5261    }
5262}
5263
5264void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5265                                                   struct audio_port_config *dstConfig,
5266                                                   const struct audio_port_config *srcConfig) const
5267{
5268    ALOG_ASSERT(mProfile != 0,
5269                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5270    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5271                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5272    if (srcConfig != NULL) {
5273        dstConfig->config_mask |= srcConfig->config_mask;
5274    }
5275
5276    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5277
5278    dstConfig->id = mId;
5279    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5280    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5281    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5282    dstConfig->ext.mix.handle = mIoHandle;
5283    dstConfig->ext.mix.usecase.source = mInputSource;
5284}
5285
5286void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5287                                                    struct audio_port *port) const
5288{
5289    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5290
5291    mProfile->toAudioPort(port);
5292    port->id = mId;
5293    toAudioPortConfig(&port->active_config);
5294    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5295    port->ext.mix.handle = mIoHandle;
5296    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5297}
5298
5299status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5300{
5301    const size_t SIZE = 256;
5302    char buffer[SIZE];
5303    String8 result;
5304
5305    snprintf(buffer, SIZE, " ID: %d\n", mId);
5306    result.append(buffer);
5307    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5308    result.append(buffer);
5309    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5310    result.append(buffer);
5311    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5312    result.append(buffer);
5313    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5314    result.append(buffer);
5315    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5316    result.append(buffer);
5317    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5318    result.append(buffer);
5319
5320    write(fd, result.string(), result.size());
5321
5322    return NO_ERROR;
5323}
5324
5325// --- StreamDescriptor class implementation
5326
5327AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5328    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5329{
5330    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5331}
5332
5333int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5334{
5335    device = AudioPolicyManager::getDeviceForVolume(device);
5336    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5337    if (mIndexCur.indexOfKey(device) < 0) {
5338        device = AUDIO_DEVICE_OUT_DEFAULT;
5339    }
5340    return mIndexCur.valueFor(device);
5341}
5342
5343void AudioPolicyManager::StreamDescriptor::dump(int fd)
5344{
5345    const size_t SIZE = 256;
5346    char buffer[SIZE];
5347    String8 result;
5348
5349    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5350             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5351    result.append(buffer);
5352    for (size_t i = 0; i < mIndexCur.size(); i++) {
5353        snprintf(buffer, SIZE, "%04x : %02d, ",
5354                 mIndexCur.keyAt(i),
5355                 mIndexCur.valueAt(i));
5356        result.append(buffer);
5357    }
5358    result.append("\n");
5359
5360    write(fd, result.string(), result.size());
5361}
5362
5363// --- EffectDescriptor class implementation
5364
5365status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5366{
5367    const size_t SIZE = 256;
5368    char buffer[SIZE];
5369    String8 result;
5370
5371    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5372    result.append(buffer);
5373    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5374    result.append(buffer);
5375    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5376    result.append(buffer);
5377    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5378    result.append(buffer);
5379    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5380    result.append(buffer);
5381    write(fd, result.string(), result.size());
5382
5383    return NO_ERROR;
5384}
5385
5386// --- HwModule class implementation
5387
5388AudioPolicyManager::HwModule::HwModule(const char *name)
5389    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5390      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5391{
5392}
5393
5394AudioPolicyManager::HwModule::~HwModule()
5395{
5396    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5397        mOutputProfiles[i]->mSupportedDevices.clear();
5398    }
5399    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5400        mInputProfiles[i]->mSupportedDevices.clear();
5401    }
5402    free((void *)mName);
5403}
5404
5405status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5406{
5407    cnode *node = root->first_child;
5408
5409    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5410
5411    while (node) {
5412        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5413            profile->loadSamplingRates((char *)node->value);
5414        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5415            profile->loadFormats((char *)node->value);
5416        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5417            profile->loadInChannels((char *)node->value);
5418        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5419            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5420                                                           mDeclaredDevices);
5421        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5422            profile->loadGains(node);
5423        }
5424        node = node->next;
5425    }
5426    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5427            "loadInput() invalid supported devices");
5428    ALOGW_IF(profile->mChannelMasks.size() == 0,
5429            "loadInput() invalid supported channel masks");
5430    ALOGW_IF(profile->mSamplingRates.size() == 0,
5431            "loadInput() invalid supported sampling rates");
5432    ALOGW_IF(profile->mFormats.size() == 0,
5433            "loadInput() invalid supported formats");
5434    if (!profile->mSupportedDevices.isEmpty() &&
5435            (profile->mChannelMasks.size() != 0) &&
5436            (profile->mSamplingRates.size() != 0) &&
5437            (profile->mFormats.size() != 0)) {
5438
5439        ALOGV("loadInput() adding input Supported Devices %04x",
5440              profile->mSupportedDevices.types());
5441
5442        mInputProfiles.add(profile);
5443        return NO_ERROR;
5444    } else {
5445        return BAD_VALUE;
5446    }
5447}
5448
5449status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5450{
5451    cnode *node = root->first_child;
5452
5453    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5454
5455    while (node) {
5456        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5457            profile->loadSamplingRates((char *)node->value);
5458        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5459            profile->loadFormats((char *)node->value);
5460        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5461            profile->loadOutChannels((char *)node->value);
5462        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5463            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5464                                                           mDeclaredDevices);
5465        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5466            profile->mFlags = parseFlagNames((char *)node->value);
5467        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5468            profile->loadGains(node);
5469        }
5470        node = node->next;
5471    }
5472    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5473            "loadOutput() invalid supported devices");
5474    ALOGW_IF(profile->mChannelMasks.size() == 0,
5475            "loadOutput() invalid supported channel masks");
5476    ALOGW_IF(profile->mSamplingRates.size() == 0,
5477            "loadOutput() invalid supported sampling rates");
5478    ALOGW_IF(profile->mFormats.size() == 0,
5479            "loadOutput() invalid supported formats");
5480    if (!profile->mSupportedDevices.isEmpty() &&
5481            (profile->mChannelMasks.size() != 0) &&
5482            (profile->mSamplingRates.size() != 0) &&
5483            (profile->mFormats.size() != 0)) {
5484
5485        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5486              profile->mSupportedDevices.types(), profile->mFlags);
5487
5488        mOutputProfiles.add(profile);
5489        return NO_ERROR;
5490    } else {
5491        return BAD_VALUE;
5492    }
5493}
5494
5495status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5496{
5497    cnode *node = root->first_child;
5498
5499    audio_devices_t type = AUDIO_DEVICE_NONE;
5500    while (node) {
5501        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5502            type = parseDeviceNames((char *)node->value);
5503            break;
5504        }
5505        node = node->next;
5506    }
5507    if (type == AUDIO_DEVICE_NONE ||
5508            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5509        ALOGW("loadDevice() bad type %08x", type);
5510        return BAD_VALUE;
5511    }
5512    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5513    deviceDesc->mModule = this;
5514
5515    node = root->first_child;
5516    while (node) {
5517        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5518            deviceDesc->mAddress = String8((char *)node->value);
5519        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5520            if (audio_is_input_device(type)) {
5521                deviceDesc->loadInChannels((char *)node->value);
5522            } else {
5523                deviceDesc->loadOutChannels((char *)node->value);
5524            }
5525        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5526            deviceDesc->loadGains(node);
5527        }
5528        node = node->next;
5529    }
5530
5531    ALOGV("loadDevice() adding device name %s type %08x address %s",
5532          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5533
5534    mDeclaredDevices.add(deviceDesc);
5535
5536    return NO_ERROR;
5537}
5538
5539void AudioPolicyManager::HwModule::dump(int fd)
5540{
5541    const size_t SIZE = 256;
5542    char buffer[SIZE];
5543    String8 result;
5544
5545    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5546    result.append(buffer);
5547    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5548    result.append(buffer);
5549    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5550    result.append(buffer);
5551    write(fd, result.string(), result.size());
5552    if (mOutputProfiles.size()) {
5553        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5554        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5555            snprintf(buffer, SIZE, "    output %zu:\n", i);
5556            write(fd, buffer, strlen(buffer));
5557            mOutputProfiles[i]->dump(fd);
5558        }
5559    }
5560    if (mInputProfiles.size()) {
5561        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5562        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5563            snprintf(buffer, SIZE, "    input %zu:\n", i);
5564            write(fd, buffer, strlen(buffer));
5565            mInputProfiles[i]->dump(fd);
5566        }
5567    }
5568    if (mDeclaredDevices.size()) {
5569        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5570        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5571            mDeclaredDevices[i]->dump(fd, 4, i);
5572        }
5573    }
5574}
5575
5576// --- AudioPort class implementation
5577
5578
5579AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5580          audio_port_role_t role, const sp<HwModule>& module) :
5581    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5582{
5583    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5584                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5585}
5586
5587void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5588{
5589    port->role = mRole;
5590    port->type = mType;
5591    unsigned int i;
5592    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5593        if (mSamplingRates[i] != 0) {
5594            port->sample_rates[i] = mSamplingRates[i];
5595        }
5596    }
5597    port->num_sample_rates = i;
5598    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5599        if (mChannelMasks[i] != 0) {
5600            port->channel_masks[i] = mChannelMasks[i];
5601        }
5602    }
5603    port->num_channel_masks = i;
5604    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5605        if (mFormats[i] != 0) {
5606            port->formats[i] = mFormats[i];
5607        }
5608    }
5609    port->num_formats = i;
5610
5611    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5612
5613    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5614        port->gains[i] = mGains[i]->mGain;
5615    }
5616    port->num_gains = i;
5617}
5618
5619void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
5620    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
5621        const uint32_t rate = port->mSamplingRates.itemAt(k);
5622        if (rate != 0) { // skip "dynamic" rates
5623            bool hasRate = false;
5624            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
5625                if (rate == mSamplingRates.itemAt(l)) {
5626                    hasRate = true;
5627                    break;
5628                }
5629            }
5630            if (!hasRate) { // never import a sampling rate twice
5631                mSamplingRates.add(rate);
5632            }
5633        }
5634    }
5635    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
5636        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
5637        if (mask != 0) { // skip "dynamic" masks
5638            bool hasMask = false;
5639            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
5640                if (mask == mChannelMasks.itemAt(l)) {
5641                    hasMask = true;
5642                    break;
5643                }
5644            }
5645            if (!hasMask) { // never import a channel mask twice
5646                mChannelMasks.add(mask);
5647            }
5648        }
5649    }
5650    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
5651        const audio_format_t format = port->mFormats.itemAt(k);
5652        if (format != 0) { // skip "dynamic" formats
5653            bool hasFormat = false;
5654            for (size_t l = 0 ; l < mFormats.size() ; l++) {
5655                if (format == mFormats.itemAt(l)) {
5656                    hasFormat = true;
5657                    break;
5658                }
5659            }
5660            if (!hasFormat) { // never import a channel mask twice
5661                mFormats.add(format);
5662            }
5663        }
5664    }
5665}
5666
5667void AudioPolicyManager::AudioPort::clearCapabilities() {
5668    mChannelMasks.clear();
5669    mFormats.clear();
5670    mSamplingRates.clear();
5671}
5672
5673void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5674{
5675    char *str = strtok(name, "|");
5676
5677    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5678    // rates should be read from the output stream after it is opened for the first time
5679    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5680        mSamplingRates.add(0);
5681        return;
5682    }
5683
5684    while (str != NULL) {
5685        uint32_t rate = atoi(str);
5686        if (rate != 0) {
5687            ALOGV("loadSamplingRates() adding rate %d", rate);
5688            mSamplingRates.add(rate);
5689        }
5690        str = strtok(NULL, "|");
5691    }
5692}
5693
5694void AudioPolicyManager::AudioPort::loadFormats(char *name)
5695{
5696    char *str = strtok(name, "|");
5697
5698    // by convention, "0' in the first entry in mFormats indicates the supported formats
5699    // should be read from the output stream after it is opened for the first time
5700    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5701        mFormats.add(AUDIO_FORMAT_DEFAULT);
5702        return;
5703    }
5704
5705    while (str != NULL) {
5706        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5707                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5708                                                             str);
5709        if (format != AUDIO_FORMAT_DEFAULT) {
5710            mFormats.add(format);
5711        }
5712        str = strtok(NULL, "|");
5713    }
5714}
5715
5716void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5717{
5718    const char *str = strtok(name, "|");
5719
5720    ALOGV("loadInChannels() %s", name);
5721
5722    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5723        mChannelMasks.add(0);
5724        return;
5725    }
5726
5727    while (str != NULL) {
5728        audio_channel_mask_t channelMask =
5729                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5730                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5731                                                   str);
5732        if (channelMask != 0) {
5733            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5734            mChannelMasks.add(channelMask);
5735        }
5736        str = strtok(NULL, "|");
5737    }
5738}
5739
5740void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5741{
5742    const char *str = strtok(name, "|");
5743
5744    ALOGV("loadOutChannels() %s", name);
5745
5746    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5747    // masks should be read from the output stream after it is opened for the first time
5748    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5749        mChannelMasks.add(0);
5750        return;
5751    }
5752
5753    while (str != NULL) {
5754        audio_channel_mask_t channelMask =
5755                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5756                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5757                                                   str);
5758        if (channelMask != 0) {
5759            mChannelMasks.add(channelMask);
5760        }
5761        str = strtok(NULL, "|");
5762    }
5763    return;
5764}
5765
5766audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5767{
5768    const char *str = strtok(name, "|");
5769
5770    ALOGV("loadGainMode() %s", name);
5771    audio_gain_mode_t mode = 0;
5772    while (str != NULL) {
5773        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5774                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5775                                                str);
5776        str = strtok(NULL, "|");
5777    }
5778    return mode;
5779}
5780
5781void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5782{
5783    cnode *node = root->first_child;
5784
5785    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5786
5787    while (node) {
5788        if (strcmp(node->name, GAIN_MODE) == 0) {
5789            gain->mGain.mode = loadGainMode((char *)node->value);
5790        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5791            if (mUseInChannelMask) {
5792                gain->mGain.channel_mask =
5793                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5794                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5795                                                           (char *)node->value);
5796            } else {
5797                gain->mGain.channel_mask =
5798                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5799                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5800                                                           (char *)node->value);
5801            }
5802        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5803            gain->mGain.min_value = atoi((char *)node->value);
5804        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5805            gain->mGain.max_value = atoi((char *)node->value);
5806        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5807            gain->mGain.default_value = atoi((char *)node->value);
5808        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5809            gain->mGain.step_value = atoi((char *)node->value);
5810        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5811            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5812        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5813            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5814        }
5815        node = node->next;
5816    }
5817
5818    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5819          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5820
5821    if (gain->mGain.mode == 0) {
5822        return;
5823    }
5824    mGains.add(gain);
5825}
5826
5827void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5828{
5829    cnode *node = root->first_child;
5830    int index = 0;
5831    while (node) {
5832        ALOGV("loadGains() loading gain %s", node->name);
5833        loadGain(node, index++);
5834        node = node->next;
5835    }
5836}
5837
5838status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5839{
5840    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5841        if (mSamplingRates[i] == samplingRate) {
5842            return NO_ERROR;
5843        }
5844    }
5845    return BAD_VALUE;
5846}
5847
5848status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5849        uint32_t *updatedSamplingRate) const
5850{
5851    // Search for the closest supported sampling rate that is above (preferred)
5852    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5853    // The sampling rates do not need to be sorted in ascending order.
5854    ssize_t maxBelow = -1;
5855    ssize_t minAbove = -1;
5856    uint32_t candidate;
5857    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5858        candidate = mSamplingRates[i];
5859        if (candidate == samplingRate) {
5860            if (updatedSamplingRate != NULL) {
5861                *updatedSamplingRate = candidate;
5862            }
5863            return NO_ERROR;
5864        }
5865        // candidate < desired
5866        if (candidate < samplingRate) {
5867            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5868                maxBelow = i;
5869            }
5870        // candidate > desired
5871        } else {
5872            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5873                minAbove = i;
5874            }
5875        }
5876    }
5877    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5878    // TODO Move these assumptions out.
5879    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5880    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5881                                                    // due to approximation by an int32_t of the
5882                                                    // phase increments
5883    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5884    if (minAbove >= 0) {
5885        candidate = mSamplingRates[minAbove];
5886        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5887            if (updatedSamplingRate != NULL) {
5888                *updatedSamplingRate = candidate;
5889            }
5890            return NO_ERROR;
5891        }
5892    }
5893    // But if we have to up-sample from a lower sampling rate, that's OK.
5894    if (maxBelow >= 0) {
5895        candidate = mSamplingRates[maxBelow];
5896        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5897            if (updatedSamplingRate != NULL) {
5898                *updatedSamplingRate = candidate;
5899            }
5900            return NO_ERROR;
5901        }
5902    }
5903    // leave updatedSamplingRate unmodified
5904    return BAD_VALUE;
5905}
5906
5907status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5908{
5909    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5910        if (mChannelMasks[i] == channelMask) {
5911            return NO_ERROR;
5912        }
5913    }
5914    return BAD_VALUE;
5915}
5916
5917status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5918        const
5919{
5920    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5921    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5922        // FIXME Does not handle multi-channel automatic conversions yet
5923        audio_channel_mask_t supported = mChannelMasks[i];
5924        if (supported == channelMask) {
5925            return NO_ERROR;
5926        }
5927        if (isRecordThread) {
5928            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5929            // FIXME Abstract this out to a table.
5930            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5931                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5932                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5933                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5934                return NO_ERROR;
5935            }
5936        }
5937    }
5938    return BAD_VALUE;
5939}
5940
5941status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
5942{
5943    for (size_t i = 0; i < mFormats.size(); i ++) {
5944        if (mFormats[i] == format) {
5945            return NO_ERROR;
5946        }
5947    }
5948    return BAD_VALUE;
5949}
5950
5951
5952uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
5953{
5954    // special case for uninitialized dynamic profile
5955    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
5956        return 0;
5957    }
5958
5959    uint32_t samplingRate = 0;
5960    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
5961
5962    // For mixed output and inputs, use max mixer sampling rates. Do not
5963    // limit sampling rate otherwise
5964    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5965            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5966            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5967        maxRate = UINT_MAX;
5968    }
5969    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5970        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
5971            samplingRate = mSamplingRates[i];
5972        }
5973    }
5974    return samplingRate;
5975}
5976
5977audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
5978{
5979    // special case for uninitialized dynamic profile
5980    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
5981        return AUDIO_CHANNEL_NONE;
5982    }
5983
5984    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
5985    uint32_t channelCount = 0;
5986    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
5987
5988    // For mixed output and inputs, use max mixer channel count. Do not
5989    // limit channel count otherwise
5990    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5991            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5992            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5993        maxCount = UINT_MAX;
5994    }
5995    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5996        uint32_t cnlCount;
5997        if (mUseInChannelMask) {
5998            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
5999        } else {
6000            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6001        }
6002        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6003            channelMask = mChannelMasks[i];
6004        }
6005    }
6006    return channelMask;
6007}
6008
6009/* format in order of increasing preference */
6010const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6011        AUDIO_FORMAT_DEFAULT,
6012        AUDIO_FORMAT_PCM_16_BIT,
6013        AUDIO_FORMAT_PCM_8_24_BIT,
6014        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6015        AUDIO_FORMAT_PCM_32_BIT,
6016        AUDIO_FORMAT_PCM_FLOAT,
6017};
6018
6019int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6020                                                  audio_format_t format2)
6021{
6022    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6023    // compressed format and better than any PCM format. This is by design of pickFormat()
6024    if (!audio_is_linear_pcm(format1)) {
6025        if (!audio_is_linear_pcm(format2)) {
6026            return 0;
6027        }
6028        return 1;
6029    }
6030    if (!audio_is_linear_pcm(format2)) {
6031        return -1;
6032    }
6033
6034    int index1 = -1, index2 = -1;
6035    for (size_t i = 0;
6036            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6037            i ++) {
6038        if (sPcmFormatCompareTable[i] == format1) {
6039            index1 = i;
6040        }
6041        if (sPcmFormatCompareTable[i] == format2) {
6042            index2 = i;
6043        }
6044    }
6045    // format1 not found => index1 < 0 => format2 > format1
6046    // format2 not found => index2 < 0 => format2 < format1
6047    return index1 - index2;
6048}
6049
6050audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6051{
6052    // special case for uninitialized dynamic profile
6053    if (mFormats.size() == 1 && mFormats[0] == 0) {
6054        return AUDIO_FORMAT_DEFAULT;
6055    }
6056
6057    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6058    audio_format_t bestFormat =
6059            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6060                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6061    // For mixed output and inputs, use best mixer output format. Do not
6062    // limit format otherwise
6063    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6064            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6065             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6066        bestFormat = AUDIO_FORMAT_INVALID;
6067    }
6068
6069    for (size_t i = 0; i < mFormats.size(); i ++) {
6070        if ((compareFormats(mFormats[i], format) > 0) &&
6071                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6072            format = mFormats[i];
6073        }
6074    }
6075    return format;
6076}
6077
6078status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6079                                                  int index) const
6080{
6081    if (index < 0 || (size_t)index >= mGains.size()) {
6082        return BAD_VALUE;
6083    }
6084    return mGains[index]->checkConfig(gainConfig);
6085}
6086
6087void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6088{
6089    const size_t SIZE = 256;
6090    char buffer[SIZE];
6091    String8 result;
6092
6093    if (mName.size() != 0) {
6094        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6095        result.append(buffer);
6096    }
6097
6098    if (mSamplingRates.size() != 0) {
6099        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6100        result.append(buffer);
6101        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6102            if (i == 0 && mSamplingRates[i] == 0) {
6103                snprintf(buffer, SIZE, "Dynamic");
6104            } else {
6105                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6106            }
6107            result.append(buffer);
6108            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6109        }
6110        result.append("\n");
6111    }
6112
6113    if (mChannelMasks.size() != 0) {
6114        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6115        result.append(buffer);
6116        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6117            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6118
6119            if (i == 0 && mChannelMasks[i] == 0) {
6120                snprintf(buffer, SIZE, "Dynamic");
6121            } else {
6122                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6123            }
6124            result.append(buffer);
6125            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6126        }
6127        result.append("\n");
6128    }
6129
6130    if (mFormats.size() != 0) {
6131        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6132        result.append(buffer);
6133        for (size_t i = 0; i < mFormats.size(); i++) {
6134            const char *formatStr = enumToString(sFormatNameToEnumTable,
6135                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6136                                                 mFormats[i]);
6137            if (i == 0 && strcmp(formatStr, "") == 0) {
6138                snprintf(buffer, SIZE, "Dynamic");
6139            } else {
6140                snprintf(buffer, SIZE, "%s", formatStr);
6141            }
6142            result.append(buffer);
6143            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6144        }
6145        result.append("\n");
6146    }
6147    write(fd, result.string(), result.size());
6148    if (mGains.size() != 0) {
6149        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6150        write(fd, buffer, strlen(buffer) + 1);
6151        result.append(buffer);
6152        for (size_t i = 0; i < mGains.size(); i++) {
6153            mGains[i]->dump(fd, spaces + 2, i);
6154        }
6155    }
6156}
6157
6158// --- AudioGain class implementation
6159
6160AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6161{
6162    mIndex = index;
6163    mUseInChannelMask = useInChannelMask;
6164    memset(&mGain, 0, sizeof(struct audio_gain));
6165}
6166
6167void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6168{
6169    config->index = mIndex;
6170    config->mode = mGain.mode;
6171    config->channel_mask = mGain.channel_mask;
6172    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6173        config->values[0] = mGain.default_value;
6174    } else {
6175        uint32_t numValues;
6176        if (mUseInChannelMask) {
6177            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6178        } else {
6179            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6180        }
6181        for (size_t i = 0; i < numValues; i++) {
6182            config->values[i] = mGain.default_value;
6183        }
6184    }
6185    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6186        config->ramp_duration_ms = mGain.min_ramp_ms;
6187    }
6188}
6189
6190status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6191{
6192    if ((config->mode & ~mGain.mode) != 0) {
6193        return BAD_VALUE;
6194    }
6195    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6196        if ((config->values[0] < mGain.min_value) ||
6197                    (config->values[0] > mGain.max_value)) {
6198            return BAD_VALUE;
6199        }
6200    } else {
6201        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6202            return BAD_VALUE;
6203        }
6204        uint32_t numValues;
6205        if (mUseInChannelMask) {
6206            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6207        } else {
6208            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6209        }
6210        for (size_t i = 0; i < numValues; i++) {
6211            if ((config->values[i] < mGain.min_value) ||
6212                    (config->values[i] > mGain.max_value)) {
6213                return BAD_VALUE;
6214            }
6215        }
6216    }
6217    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6218        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6219                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6220            return BAD_VALUE;
6221        }
6222    }
6223    return NO_ERROR;
6224}
6225
6226void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6227{
6228    const size_t SIZE = 256;
6229    char buffer[SIZE];
6230    String8 result;
6231
6232    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6233    result.append(buffer);
6234    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6235    result.append(buffer);
6236    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6237    result.append(buffer);
6238    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6239    result.append(buffer);
6240    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6241    result.append(buffer);
6242    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6243    result.append(buffer);
6244    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6245    result.append(buffer);
6246    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6247    result.append(buffer);
6248    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6249    result.append(buffer);
6250
6251    write(fd, result.string(), result.size());
6252}
6253
6254// --- AudioPortConfig class implementation
6255
6256AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6257{
6258    mSamplingRate = 0;
6259    mChannelMask = AUDIO_CHANNEL_NONE;
6260    mFormat = AUDIO_FORMAT_INVALID;
6261    mGain.index = -1;
6262}
6263
6264status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6265                                                        const struct audio_port_config *config,
6266                                                        struct audio_port_config *backupConfig)
6267{
6268    struct audio_port_config localBackupConfig;
6269    status_t status = NO_ERROR;
6270
6271    localBackupConfig.config_mask = config->config_mask;
6272    toAudioPortConfig(&localBackupConfig);
6273
6274    sp<AudioPort> audioport = getAudioPort();
6275    if (audioport == 0) {
6276        status = NO_INIT;
6277        goto exit;
6278    }
6279    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6280        status = audioport->checkExactSamplingRate(config->sample_rate);
6281        if (status != NO_ERROR) {
6282            goto exit;
6283        }
6284        mSamplingRate = config->sample_rate;
6285    }
6286    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6287        status = audioport->checkExactChannelMask(config->channel_mask);
6288        if (status != NO_ERROR) {
6289            goto exit;
6290        }
6291        mChannelMask = config->channel_mask;
6292    }
6293    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6294        status = audioport->checkFormat(config->format);
6295        if (status != NO_ERROR) {
6296            goto exit;
6297        }
6298        mFormat = config->format;
6299    }
6300    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6301        status = audioport->checkGain(&config->gain, config->gain.index);
6302        if (status != NO_ERROR) {
6303            goto exit;
6304        }
6305        mGain = config->gain;
6306    }
6307
6308exit:
6309    if (status != NO_ERROR) {
6310        applyAudioPortConfig(&localBackupConfig);
6311    }
6312    if (backupConfig != NULL) {
6313        *backupConfig = localBackupConfig;
6314    }
6315    return status;
6316}
6317
6318void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6319                                                    struct audio_port_config *dstConfig,
6320                                                    const struct audio_port_config *srcConfig) const
6321{
6322    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6323        dstConfig->sample_rate = mSamplingRate;
6324        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6325            dstConfig->sample_rate = srcConfig->sample_rate;
6326        }
6327    } else {
6328        dstConfig->sample_rate = 0;
6329    }
6330    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6331        dstConfig->channel_mask = mChannelMask;
6332        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6333            dstConfig->channel_mask = srcConfig->channel_mask;
6334        }
6335    } else {
6336        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6337    }
6338    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6339        dstConfig->format = mFormat;
6340        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6341            dstConfig->format = srcConfig->format;
6342        }
6343    } else {
6344        dstConfig->format = AUDIO_FORMAT_INVALID;
6345    }
6346    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6347        dstConfig->gain = mGain;
6348        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6349            dstConfig->gain = srcConfig->gain;
6350        }
6351    } else {
6352        dstConfig->gain.index = -1;
6353    }
6354    if (dstConfig->gain.index != -1) {
6355        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6356    } else {
6357        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6358    }
6359}
6360
6361// --- IOProfile class implementation
6362
6363AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6364                                         const sp<HwModule>& module)
6365    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6366{
6367}
6368
6369AudioPolicyManager::IOProfile::~IOProfile()
6370{
6371}
6372
6373// checks if the IO profile is compatible with specified parameters.
6374// Sampling rate, format and channel mask must be specified in order to
6375// get a valid a match
6376bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6377                                                            uint32_t samplingRate,
6378                                                            uint32_t *updatedSamplingRate,
6379                                                            audio_format_t format,
6380                                                            audio_channel_mask_t channelMask,
6381                                                            audio_output_flags_t flags) const
6382{
6383    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6384    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6385    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6386
6387    if ((mSupportedDevices.types() & device) != device) {
6388        return false;
6389    }
6390
6391    if (samplingRate == 0) {
6392         return false;
6393    }
6394    uint32_t myUpdatedSamplingRate = samplingRate;
6395    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6396         return false;
6397    }
6398    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6399            NO_ERROR) {
6400         return false;
6401    }
6402
6403    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6404        return false;
6405    }
6406
6407    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6408            checkExactChannelMask(channelMask) != NO_ERROR)) {
6409        return false;
6410    }
6411    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6412            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6413        return false;
6414    }
6415
6416    if (isPlaybackThread && (mFlags & flags) != flags) {
6417        return false;
6418    }
6419    // The only input flag that is allowed to be different is the fast flag.
6420    // An existing fast stream is compatible with a normal track request.
6421    // An existing normal stream is compatible with a fast track request,
6422    // but the fast request will be denied by AudioFlinger and converted to normal track.
6423    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
6424            ~AUDIO_INPUT_FLAG_FAST)) {
6425        return false;
6426    }
6427
6428    if (updatedSamplingRate != NULL) {
6429        *updatedSamplingRate = myUpdatedSamplingRate;
6430    }
6431    return true;
6432}
6433
6434void AudioPolicyManager::IOProfile::dump(int fd)
6435{
6436    const size_t SIZE = 256;
6437    char buffer[SIZE];
6438    String8 result;
6439
6440    AudioPort::dump(fd, 4);
6441
6442    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6443    result.append(buffer);
6444    snprintf(buffer, SIZE, "    - devices:\n");
6445    result.append(buffer);
6446    write(fd, result.string(), result.size());
6447    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6448        mSupportedDevices[i]->dump(fd, 6, i);
6449    }
6450}
6451
6452void AudioPolicyManager::IOProfile::log()
6453{
6454    const size_t SIZE = 256;
6455    char buffer[SIZE];
6456    String8 result;
6457
6458    ALOGV("    - sampling rates: ");
6459    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6460        ALOGV("  %d", mSamplingRates[i]);
6461    }
6462
6463    ALOGV("    - channel masks: ");
6464    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6465        ALOGV("  0x%04x", mChannelMasks[i]);
6466    }
6467
6468    ALOGV("    - formats: ");
6469    for (size_t i = 0; i < mFormats.size(); i++) {
6470        ALOGV("  0x%08x", mFormats[i]);
6471    }
6472
6473    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6474    ALOGV("    - flags: 0x%04x\n", mFlags);
6475}
6476
6477
6478// --- DeviceDescriptor implementation
6479
6480
6481AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6482                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6483                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6484                                                              AUDIO_PORT_ROLE_SOURCE,
6485                             NULL),
6486                     mDeviceType(type), mAddress(""), mId(0)
6487{
6488    if (mGains.size() > 0) {
6489        mGains[0]->getDefaultConfig(&mGain);
6490    }
6491}
6492
6493bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6494{
6495    // Devices are considered equal if they:
6496    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6497    // - have the same address or one device does not specify the address
6498    // - have the same channel mask or one device does not specify the channel mask
6499    return (mDeviceType == other->mDeviceType) &&
6500           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6501           (mChannelMask == 0 || other->mChannelMask == 0 ||
6502                mChannelMask == other->mChannelMask);
6503}
6504
6505void AudioPolicyManager::DeviceVector::refreshTypes()
6506{
6507    mDeviceTypes = AUDIO_DEVICE_NONE;
6508    for(size_t i = 0; i < size(); i++) {
6509        mDeviceTypes |= itemAt(i)->mDeviceType;
6510    }
6511    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6512}
6513
6514ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6515{
6516    for(size_t i = 0; i < size(); i++) {
6517        if (item->equals(itemAt(i))) {
6518            return i;
6519        }
6520    }
6521    return -1;
6522}
6523
6524ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6525{
6526    ssize_t ret = indexOf(item);
6527
6528    if (ret < 0) {
6529        ret = SortedVector::add(item);
6530        if (ret >= 0) {
6531            refreshTypes();
6532        }
6533    } else {
6534        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6535        ret = -1;
6536    }
6537    return ret;
6538}
6539
6540ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6541{
6542    size_t i;
6543    ssize_t ret = indexOf(item);
6544
6545    if (ret < 0) {
6546        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6547    } else {
6548        ret = SortedVector::removeAt(ret);
6549        if (ret >= 0) {
6550            refreshTypes();
6551        }
6552    }
6553    return ret;
6554}
6555
6556void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6557{
6558    DeviceVector deviceList;
6559
6560    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6561    types &= ~role_bit;
6562
6563    while (types) {
6564        uint32_t i = 31 - __builtin_clz(types);
6565        uint32_t type = 1 << i;
6566        types &= ~type;
6567        add(new DeviceDescriptor(String8(""), type | role_bit));
6568    }
6569}
6570
6571void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6572                                                           const DeviceVector& declaredDevices)
6573{
6574    char *devName = strtok(name, "|");
6575    while (devName != NULL) {
6576        if (strlen(devName) != 0) {
6577            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6578                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6579                                 devName);
6580            if (type != AUDIO_DEVICE_NONE) {
6581                add(new DeviceDescriptor(String8(""), type));
6582            } else {
6583                sp<DeviceDescriptor> deviceDesc =
6584                        declaredDevices.getDeviceFromName(String8(devName));
6585                if (deviceDesc != 0) {
6586                    add(deviceDesc);
6587                }
6588            }
6589         }
6590        devName = strtok(NULL, "|");
6591     }
6592}
6593
6594sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6595                                                        audio_devices_t type, String8 address) const
6596{
6597    sp<DeviceDescriptor> device;
6598    for (size_t i = 0; i < size(); i++) {
6599        if (itemAt(i)->mDeviceType == type) {
6600            device = itemAt(i);
6601            if (itemAt(i)->mAddress = address) {
6602                break;
6603            }
6604        }
6605    }
6606    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6607          type, address.string(), device.get());
6608    return device;
6609}
6610
6611sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6612                                                                    audio_port_handle_t id) const
6613{
6614    sp<DeviceDescriptor> device;
6615    for (size_t i = 0; i < size(); i++) {
6616        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6617        if (itemAt(i)->mId == id) {
6618            device = itemAt(i);
6619            break;
6620        }
6621    }
6622    return device;
6623}
6624
6625AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6626                                                                        audio_devices_t type) const
6627{
6628    DeviceVector devices;
6629    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6630        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6631            devices.add(itemAt(i));
6632            type &= ~itemAt(i)->mDeviceType;
6633            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6634                  itemAt(i)->mDeviceType, itemAt(i).get());
6635        }
6636    }
6637    return devices;
6638}
6639
6640AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6641        audio_devices_t type, String8 address) const
6642{
6643    DeviceVector devices;
6644    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6645    for (size_t i = 0; i < size(); i++) {
6646        //ALOGV("     at i=%d: device=%x, addr=%s",
6647        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6648        if (itemAt(i)->mDeviceType == type) {
6649            if (itemAt(i)->mAddress == address) {
6650                //ALOGV("      found matching address %s", address.string());
6651                devices.add(itemAt(i));
6652            }
6653        }
6654    }
6655    return devices;
6656}
6657
6658sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6659        const String8& name) const
6660{
6661    sp<DeviceDescriptor> device;
6662    for (size_t i = 0; i < size(); i++) {
6663        if (itemAt(i)->mName == name) {
6664            device = itemAt(i);
6665            break;
6666        }
6667    }
6668    return device;
6669}
6670
6671void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6672                                                    struct audio_port_config *dstConfig,
6673                                                    const struct audio_port_config *srcConfig) const
6674{
6675    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6676    if (srcConfig != NULL) {
6677        dstConfig->config_mask |= srcConfig->config_mask;
6678    }
6679
6680    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6681
6682    dstConfig->id = mId;
6683    dstConfig->role = audio_is_output_device(mDeviceType) ?
6684                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6685    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6686    dstConfig->ext.device.type = mDeviceType;
6687    dstConfig->ext.device.hw_module = mModule->mHandle;
6688    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6689}
6690
6691void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6692{
6693    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6694    AudioPort::toAudioPort(port);
6695    port->id = mId;
6696    toAudioPortConfig(&port->active_config);
6697    port->ext.device.type = mDeviceType;
6698    port->ext.device.hw_module = mModule->mHandle;
6699    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6700}
6701
6702status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6703{
6704    const size_t SIZE = 256;
6705    char buffer[SIZE];
6706    String8 result;
6707
6708    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6709    result.append(buffer);
6710    if (mId != 0) {
6711        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6712        result.append(buffer);
6713    }
6714    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6715                                              enumToString(sDeviceNameToEnumTable,
6716                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6717                                                           mDeviceType));
6718    result.append(buffer);
6719    if (mAddress.size() != 0) {
6720        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6721        result.append(buffer);
6722    }
6723    write(fd, result.string(), result.size());
6724    AudioPort::dump(fd, spaces);
6725
6726    return NO_ERROR;
6727}
6728
6729status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
6730{
6731    const size_t SIZE = 256;
6732    char buffer[SIZE];
6733    String8 result;
6734
6735
6736    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
6737    result.append(buffer);
6738    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
6739    result.append(buffer);
6740    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
6741    result.append(buffer);
6742    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
6743    result.append(buffer);
6744    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
6745    result.append(buffer);
6746    for (size_t i = 0; i < mPatch.num_sources; i++) {
6747        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
6748            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6749                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
6750                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6751                                                        mPatch.sources[i].ext.device.type));
6752        } else {
6753            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6754                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
6755        }
6756        result.append(buffer);
6757    }
6758    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
6759    result.append(buffer);
6760    for (size_t i = 0; i < mPatch.num_sinks; i++) {
6761        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
6762            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6763                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
6764                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6765                                                        mPatch.sinks[i].ext.device.type));
6766        } else {
6767            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6768                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
6769        }
6770        result.append(buffer);
6771    }
6772
6773    write(fd, result.string(), result.size());
6774    return NO_ERROR;
6775}
6776
6777// --- audio_policy.conf file parsing
6778
6779audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6780{
6781    uint32_t flag = 0;
6782
6783    // it is OK to cast name to non const here as we are not going to use it after
6784    // strtok() modifies it
6785    char *flagName = strtok(name, "|");
6786    while (flagName != NULL) {
6787        if (strlen(flagName) != 0) {
6788            flag |= stringToEnum(sFlagNameToEnumTable,
6789                               ARRAY_SIZE(sFlagNameToEnumTable),
6790                               flagName);
6791        }
6792        flagName = strtok(NULL, "|");
6793    }
6794    //force direct flag if offload flag is set: offloading implies a direct output stream
6795    // and all common behaviors are driven by checking only the direct flag
6796    // this should normally be set appropriately in the policy configuration file
6797    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6798        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6799    }
6800
6801    return (audio_output_flags_t)flag;
6802}
6803
6804audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6805{
6806    uint32_t device = 0;
6807
6808    char *devName = strtok(name, "|");
6809    while (devName != NULL) {
6810        if (strlen(devName) != 0) {
6811            device |= stringToEnum(sDeviceNameToEnumTable,
6812                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6813                                 devName);
6814         }
6815        devName = strtok(NULL, "|");
6816     }
6817    return device;
6818}
6819
6820void AudioPolicyManager::loadHwModule(cnode *root)
6821{
6822    status_t status = NAME_NOT_FOUND;
6823    cnode *node;
6824    sp<HwModule> module = new HwModule(root->name);
6825
6826    node = config_find(root, DEVICES_TAG);
6827    if (node != NULL) {
6828        node = node->first_child;
6829        while (node) {
6830            ALOGV("loadHwModule() loading device %s", node->name);
6831            status_t tmpStatus = module->loadDevice(node);
6832            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6833                status = tmpStatus;
6834            }
6835            node = node->next;
6836        }
6837    }
6838    node = config_find(root, OUTPUTS_TAG);
6839    if (node != NULL) {
6840        node = node->first_child;
6841        while (node) {
6842            ALOGV("loadHwModule() loading output %s", node->name);
6843            status_t tmpStatus = module->loadOutput(node);
6844            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6845                status = tmpStatus;
6846            }
6847            node = node->next;
6848        }
6849    }
6850    node = config_find(root, INPUTS_TAG);
6851    if (node != NULL) {
6852        node = node->first_child;
6853        while (node) {
6854            ALOGV("loadHwModule() loading input %s", node->name);
6855            status_t tmpStatus = module->loadInput(node);
6856            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6857                status = tmpStatus;
6858            }
6859            node = node->next;
6860        }
6861    }
6862    loadGlobalConfig(root, module);
6863
6864    if (status == NO_ERROR) {
6865        mHwModules.add(module);
6866    }
6867}
6868
6869void AudioPolicyManager::loadHwModules(cnode *root)
6870{
6871    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6872    if (node == NULL) {
6873        return;
6874    }
6875
6876    node = node->first_child;
6877    while (node) {
6878        ALOGV("loadHwModules() loading module %s", node->name);
6879        loadHwModule(node);
6880        node = node->next;
6881    }
6882}
6883
6884void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6885{
6886    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6887
6888    if (node == NULL) {
6889        return;
6890    }
6891    DeviceVector declaredDevices;
6892    if (module != NULL) {
6893        declaredDevices = module->mDeclaredDevices;
6894    }
6895
6896    node = node->first_child;
6897    while (node) {
6898        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6899            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6900                                                        declaredDevices);
6901            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6902                  mAvailableOutputDevices.types());
6903        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6904            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6905                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6906                                              (char *)node->value);
6907            if (device != AUDIO_DEVICE_NONE) {
6908                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6909            } else {
6910                ALOGW("loadGlobalConfig() default device not specified");
6911            }
6912            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6913        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6914            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6915                                                       declaredDevices);
6916            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6917        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6918            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6919            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6920        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6921            uint32_t major, minor;
6922            sscanf((char *)node->value, "%u.%u", &major, &minor);
6923            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6924            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6925                  module->mHalVersion, major, minor);
6926        }
6927        node = node->next;
6928    }
6929}
6930
6931status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6932{
6933    cnode *root;
6934    char *data;
6935
6936    data = (char *)load_file(path, NULL);
6937    if (data == NULL) {
6938        return -ENODEV;
6939    }
6940    root = config_node("", "");
6941    config_load(root, data);
6942
6943    loadHwModules(root);
6944    // legacy audio_policy.conf files have one global_configuration section
6945    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
6946    config_free(root);
6947    free(root);
6948    free(data);
6949
6950    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
6951
6952    return NO_ERROR;
6953}
6954
6955void AudioPolicyManager::defaultAudioPolicyConfig(void)
6956{
6957    sp<HwModule> module;
6958    sp<IOProfile> profile;
6959    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
6960                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
6961    mAvailableOutputDevices.add(mDefaultOutputDevice);
6962    mAvailableInputDevices.add(defaultInputDevice);
6963
6964    module = new HwModule("primary");
6965
6966    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
6967    profile->mSamplingRates.add(44100);
6968    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6969    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
6970    profile->mSupportedDevices.add(mDefaultOutputDevice);
6971    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
6972    module->mOutputProfiles.add(profile);
6973
6974    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
6975    profile->mSamplingRates.add(8000);
6976    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6977    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
6978    profile->mSupportedDevices.add(defaultInputDevice);
6979    module->mInputProfiles.add(profile);
6980
6981    mHwModules.add(module);
6982}
6983
6984audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
6985{
6986    // flags to stream type mapping
6987    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
6988        return AUDIO_STREAM_ENFORCED_AUDIBLE;
6989    }
6990    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
6991        return AUDIO_STREAM_BLUETOOTH_SCO;
6992    }
6993
6994    // usage to stream type mapping
6995    switch (attr->usage) {
6996    case AUDIO_USAGE_MEDIA:
6997    case AUDIO_USAGE_GAME:
6998    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
6999    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7000        return AUDIO_STREAM_MUSIC;
7001    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7002        return AUDIO_STREAM_SYSTEM;
7003    case AUDIO_USAGE_VOICE_COMMUNICATION:
7004        return AUDIO_STREAM_VOICE_CALL;
7005
7006    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7007        return AUDIO_STREAM_DTMF;
7008
7009    case AUDIO_USAGE_ALARM:
7010        return AUDIO_STREAM_ALARM;
7011    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7012        return AUDIO_STREAM_RING;
7013
7014    case AUDIO_USAGE_NOTIFICATION:
7015    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7016    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7017    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7018    case AUDIO_USAGE_NOTIFICATION_EVENT:
7019        return AUDIO_STREAM_NOTIFICATION;
7020
7021    case AUDIO_USAGE_UNKNOWN:
7022    default:
7023        return AUDIO_STREAM_MUSIC;
7024    }
7025}
7026}; // namespace android
7027