AudioPolicyManager.cpp revision 874c4287a4e49c59ac88767751dce00fcd3edb73 
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(device, 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(device, state, outputs, address);
279            } break;
280
281        default:
282            ALOGE("setDeviceConnectionState() invalid state: %x", state);
283            return BAD_VALUE;
284        }
285
286        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
287        // output is suspended before any tracks are moved to it
288        checkA2dpSuspend();
289        checkOutputForAllStrategies();
290        // outputs must be closed after checkOutputForAllStrategies() is executed
291        if (!outputs.isEmpty()) {
292            for (size_t i = 0; i < outputs.size(); i++) {
293                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
294                // close unused outputs after device disconnection or direct outputs that have been
295                // opened by checkOutputsForDevice() to query dynamic parameters
296                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
297                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
298                         (desc->mDirectOpenCount == 0))) {
299                    closeOutput(outputs[i]);
300                }
301            }
302            // check again after closing A2DP output to reset mA2dpSuspended if needed
303            checkA2dpSuspend();
304        }
305
306        updateDevicesAndOutputs();
307        if (mPhoneState == AUDIO_MODE_IN_CALL) {
308            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
309            updateCallRouting(newDevice);
310        }
311        for (size_t i = 0; i < mOutputs.size(); i++) {
312            audio_io_handle_t output = mOutputs.keyAt(i);
313            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
314                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
315                                                               true /*fromCache*/);
316                // do not force device change on duplicated output because if device is 0, it will
317                // also force a device 0 for the two outputs it is duplicated to which may override
318                // a valid device selection on those outputs.
319                bool force = !mOutputs.valueAt(i)->isDuplicated()
320                        && (!deviceDistinguishesOnAddress(device)
321                                // always force when disconnecting (a non-duplicated device)
322                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
323                setOutputDevice(output, newDevice, force, 0);
324            }
325        }
326
327        mpClientInterface->onAudioPortListUpdate();
328        return NO_ERROR;
329    }  // end if is output device
330
331    // handle input devices
332    if (audio_is_input_device(device)) {
333        SortedVector <audio_io_handle_t> inputs;
334
335        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
336        devDesc->mAddress = address;
337        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
338        switch (state)
339        {
340        // handle input device connection
341        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
342            if (index >= 0) {
343                ALOGW("setDeviceConnectionState() device already connected: %d", device);
344                return INVALID_OPERATION;
345            }
346            sp<HwModule> module = getModuleForDevice(device);
347            if (module == NULL) {
348                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
349                      device);
350                return INVALID_OPERATION;
351            }
352            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
353                return INVALID_OPERATION;
354            }
355
356            index = mAvailableInputDevices.add(devDesc);
357            if (index >= 0) {
358                mAvailableInputDevices[index]->mId = nextUniqueId();
359                mAvailableInputDevices[index]->mModule = module;
360            } else {
361                return NO_MEMORY;
362            }
363        } break;
364
365        // handle input device disconnection
366        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
367            if (index < 0) {
368                ALOGW("setDeviceConnectionState() device not connected: %d", device);
369                return INVALID_OPERATION;
370            }
371            checkInputsForDevice(device, state, inputs, address);
372            mAvailableInputDevices.remove(devDesc);
373        } break;
374
375        default:
376            ALOGE("setDeviceConnectionState() invalid state: %x", state);
377            return BAD_VALUE;
378        }
379
380        closeAllInputs();
381
382        if (mPhoneState == AUDIO_MODE_IN_CALL) {
383            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
384            updateCallRouting(newDevice);
385        }
386
387        mpClientInterface->onAudioPortListUpdate();
388        return NO_ERROR;
389    } // end if is input device
390
391    ALOGW("setDeviceConnectionState() invalid device: %x", device);
392    return BAD_VALUE;
393}
394
395audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
396                                                  const char *device_address)
397{
398    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
399    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
400    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
401    ssize_t index;
402    DeviceVector *deviceVector;
403
404    if (audio_is_output_device(device)) {
405        deviceVector = &mAvailableOutputDevices;
406    } else if (audio_is_input_device(device)) {
407        deviceVector = &mAvailableInputDevices;
408    } else {
409        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
410        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
411    }
412
413    index = deviceVector->indexOf(devDesc);
414    if (index >= 0) {
415        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
416    } else {
417        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
418    }
419}
420
421void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
422{
423    bool createTxPatch = false;
424    struct audio_patch patch;
425    patch.num_sources = 1;
426    patch.num_sinks = 1;
427    status_t status;
428    audio_patch_handle_t afPatchHandle;
429    DeviceVector deviceList;
430
431    audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
432    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
433
434    // release existing RX patch if any
435    if (mCallRxPatch != 0) {
436        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
437        mCallRxPatch.clear();
438    }
439    // release TX patch if any
440    if (mCallTxPatch != 0) {
441        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
442        mCallTxPatch.clear();
443    }
444
445    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
446    // via setOutputDevice() on primary output.
447    // Otherwise, create two audio patches for TX and RX path.
448    if (availablePrimaryOutputDevices() & rxDevice) {
449        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
450        // If the TX device is also on the primary HW module, setOutputDevice() will take care
451        // of it due to legacy implementation. If not, create a patch.
452        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
453                == AUDIO_DEVICE_NONE) {
454            createTxPatch = true;
455        }
456    } else {
457        // create RX path audio patch
458        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
459        ALOG_ASSERT(!deviceList.isEmpty(),
460                    "updateCallRouting() selected device not in output device list");
461        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
462        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
463        ALOG_ASSERT(!deviceList.isEmpty(),
464                    "updateCallRouting() no telephony RX device");
465        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
466
467        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
468        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
469
470        // request to reuse existing output stream if one is already opened to reach the RX device
471        SortedVector<audio_io_handle_t> outputs =
472                                getOutputsForDevice(rxDevice, mOutputs);
473        audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
474        if (output != AUDIO_IO_HANDLE_NONE) {
475            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
476            ALOG_ASSERT(!outputDesc->isDuplicated(),
477                        "updateCallRouting() RX device output is duplicated");
478            outputDesc->toAudioPortConfig(&patch.sources[1]);
479            patch.num_sources = 2;
480        }
481
482        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
483        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
484        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
485                                               status);
486        if (status == NO_ERROR) {
487            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
488                                       &patch, mUidCached);
489            mCallRxPatch->mAfPatchHandle = afPatchHandle;
490            mCallRxPatch->mUid = mUidCached;
491        }
492        createTxPatch = true;
493    }
494    if (createTxPatch) {
495
496        struct audio_patch patch;
497        patch.num_sources = 1;
498        patch.num_sinks = 1;
499        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
500        ALOG_ASSERT(!deviceList.isEmpty(),
501                    "updateCallRouting() selected device not in input device list");
502        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
503        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
504        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
505        ALOG_ASSERT(!deviceList.isEmpty(),
506                    "updateCallRouting() no telephony TX device");
507        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
508        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
509
510        SortedVector<audio_io_handle_t> outputs =
511                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
512        audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
513        // request to reuse existing output stream if one is already opened to reach the TX
514        // path output device
515        if (output != AUDIO_IO_HANDLE_NONE) {
516            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
517            ALOG_ASSERT(!outputDesc->isDuplicated(),
518                        "updateCallRouting() RX device output is duplicated");
519            outputDesc->toAudioPortConfig(&patch.sources[1]);
520            patch.num_sources = 2;
521        }
522
523        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
524        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
525        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
526                                               status);
527        if (status == NO_ERROR) {
528            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
529                                       &patch, mUidCached);
530            mCallTxPatch->mAfPatchHandle = afPatchHandle;
531            mCallTxPatch->mUid = mUidCached;
532        }
533    }
534}
535
536void AudioPolicyManager::setPhoneState(audio_mode_t state)
537{
538    ALOGV("setPhoneState() state %d", state);
539    if (state < 0 || state >= AUDIO_MODE_CNT) {
540        ALOGW("setPhoneState() invalid state %d", state);
541        return;
542    }
543
544    if (state == mPhoneState ) {
545        ALOGW("setPhoneState() setting same state %d", state);
546        return;
547    }
548
549    // if leaving call state, handle special case of active streams
550    // pertaining to sonification strategy see handleIncallSonification()
551    if (isInCall()) {
552        ALOGV("setPhoneState() in call state management: new state is %d", state);
553        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
554            handleIncallSonification((audio_stream_type_t)stream, false, true);
555        }
556    }
557
558    // store previous phone state for management of sonification strategy below
559    int oldState = mPhoneState;
560    mPhoneState = state;
561    bool force = false;
562
563    // are we entering or starting a call
564    if (!isStateInCall(oldState) && isStateInCall(state)) {
565        ALOGV("  Entering call in setPhoneState()");
566        // force routing command to audio hardware when starting a call
567        // even if no device change is needed
568        force = true;
569        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
570            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
571                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
572        }
573    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
574        ALOGV("  Exiting call in setPhoneState()");
575        // force routing command to audio hardware when exiting a call
576        // even if no device change is needed
577        force = true;
578        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
579            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
580                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
581        }
582    } else if (isStateInCall(state) && (state != oldState)) {
583        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
584        // force routing command to audio hardware when switching between telephony and VoIP
585        // even if no device change is needed
586        force = true;
587    }
588
589    // check for device and output changes triggered by new phone state
590    checkA2dpSuspend();
591    checkOutputForAllStrategies();
592    updateDevicesAndOutputs();
593
594    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
595
596    int delayMs = 0;
597    if (isStateInCall(state)) {
598        nsecs_t sysTime = systemTime();
599        for (size_t i = 0; i < mOutputs.size(); i++) {
600            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
601            // mute media and sonification strategies and delay device switch by the largest
602            // latency of any output where either strategy is active.
603            // This avoid sending the ring tone or music tail into the earpiece or headset.
604            if ((desc->isStrategyActive(STRATEGY_MEDIA,
605                                     SONIFICATION_HEADSET_MUSIC_DELAY,
606                                     sysTime) ||
607                    desc->isStrategyActive(STRATEGY_SONIFICATION,
608                                         SONIFICATION_HEADSET_MUSIC_DELAY,
609                                         sysTime)) &&
610                    (delayMs < (int)desc->mLatency*2)) {
611                delayMs = desc->mLatency*2;
612            }
613            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
614            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
615                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
616            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
617            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
618                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
619        }
620    }
621
622    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
623    // the device returned is not necessarily reachable via this output
624    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
625    // force routing command to audio hardware when ending call
626    // even if no device change is needed
627    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
628        rxDevice = hwOutputDesc->device();
629    }
630
631    if (state == AUDIO_MODE_IN_CALL) {
632        updateCallRouting(rxDevice, delayMs);
633    } else if (oldState == AUDIO_MODE_IN_CALL) {
634        if (mCallRxPatch != 0) {
635            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
636            mCallRxPatch.clear();
637        }
638        if (mCallTxPatch != 0) {
639            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
640            mCallTxPatch.clear();
641        }
642        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
643    } else {
644        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
645    }
646    // if entering in call state, handle special case of active streams
647    // pertaining to sonification strategy see handleIncallSonification()
648    if (isStateInCall(state)) {
649        ALOGV("setPhoneState() in call state management: new state is %d", state);
650        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
651            handleIncallSonification((audio_stream_type_t)stream, true, true);
652        }
653    }
654
655    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
656    if (state == AUDIO_MODE_RINGTONE &&
657        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
658        mLimitRingtoneVolume = true;
659    } else {
660        mLimitRingtoneVolume = false;
661    }
662}
663
664void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
665                                         audio_policy_forced_cfg_t config)
666{
667    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
668
669    bool forceVolumeReeval = false;
670    switch(usage) {
671    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
672        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
673            config != AUDIO_POLICY_FORCE_NONE) {
674            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
675            return;
676        }
677        forceVolumeReeval = true;
678        mForceUse[usage] = config;
679        break;
680    case AUDIO_POLICY_FORCE_FOR_MEDIA:
681        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
682            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
683            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
684            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
685            config != AUDIO_POLICY_FORCE_NO_BT_A2DP) {
686            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
687            return;
688        }
689        mForceUse[usage] = config;
690        break;
691    case AUDIO_POLICY_FORCE_FOR_RECORD:
692        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
693            config != AUDIO_POLICY_FORCE_NONE) {
694            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
695            return;
696        }
697        mForceUse[usage] = config;
698        break;
699    case AUDIO_POLICY_FORCE_FOR_DOCK:
700        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
701            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
702            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
703            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
704            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
705            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
706        }
707        forceVolumeReeval = true;
708        mForceUse[usage] = config;
709        break;
710    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
711        if (config != AUDIO_POLICY_FORCE_NONE &&
712            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
713            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
714        }
715        forceVolumeReeval = true;
716        mForceUse[usage] = config;
717        break;
718    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
719        if (config != AUDIO_POLICY_FORCE_NONE &&
720            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
721            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
722        }
723        mForceUse[usage] = config;
724        break;
725    default:
726        ALOGW("setForceUse() invalid usage %d", usage);
727        break;
728    }
729
730    // check for device and output changes triggered by new force usage
731    checkA2dpSuspend();
732    checkOutputForAllStrategies();
733    updateDevicesAndOutputs();
734    if (mPhoneState == AUDIO_MODE_IN_CALL) {
735        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
736        updateCallRouting(newDevice);
737    }
738    for (size_t i = 0; i < mOutputs.size(); i++) {
739        audio_io_handle_t output = mOutputs.keyAt(i);
740        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
741        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
742            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
743        }
744        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
745            applyStreamVolumes(output, newDevice, 0, true);
746        }
747    }
748
749    audio_io_handle_t activeInput = getActiveInput();
750    if (activeInput != 0) {
751        setInputDevice(activeInput, getNewInputDevice(activeInput));
752    }
753
754}
755
756audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
757{
758    return mForceUse[usage];
759}
760
761void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
762{
763    ALOGV("setSystemProperty() property %s, value %s", property, value);
764}
765
766// Find a direct output profile compatible with the parameters passed, even if the input flags do
767// not explicitly request a direct output
768sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
769                                                               audio_devices_t device,
770                                                               uint32_t samplingRate,
771                                                               audio_format_t format,
772                                                               audio_channel_mask_t channelMask,
773                                                               audio_output_flags_t flags)
774{
775    for (size_t i = 0; i < mHwModules.size(); i++) {
776        if (mHwModules[i]->mHandle == 0) {
777            continue;
778        }
779        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
780            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
781            bool found = profile->isCompatibleProfile(device, samplingRate,
782                    NULL /*updatedSamplingRate*/, format, channelMask,
783                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
784                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
785            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
786                return profile;
787            }
788        }
789    }
790    return 0;
791}
792
793audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
794                                    uint32_t samplingRate,
795                                    audio_format_t format,
796                                    audio_channel_mask_t channelMask,
797                                    audio_output_flags_t flags,
798                                    const audio_offload_info_t *offloadInfo)
799{
800
801    routing_strategy strategy = getStrategy(stream);
802    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
803    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
804          device, stream, samplingRate, format, channelMask, flags);
805
806    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
807            offloadInfo);
808}
809
810audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
811                                    uint32_t samplingRate,
812                                    audio_format_t format,
813                                    audio_channel_mask_t channelMask,
814                                    audio_output_flags_t flags,
815                                    const audio_offload_info_t *offloadInfo)
816{
817    if (attr == NULL) {
818        ALOGE("getOutputForAttr() called with NULL audio attributes");
819        return 0;
820    }
821    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
822            attr->usage, attr->content_type, attr->tags, attr->flags);
823
824    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
825    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
826    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
827
828    if ((attr->flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
829        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
830    }
831
832    ALOGV("getOutputForAttr() device %d, samplingRate %d, format %x, channelMask %x, flags %x",
833          device, samplingRate, format, channelMask, flags);
834
835    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
836    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
837                offloadInfo);
838}
839
840audio_io_handle_t AudioPolicyManager::getOutputForDevice(
841        audio_devices_t device,
842        audio_stream_type_t stream,
843        uint32_t samplingRate,
844        audio_format_t format,
845        audio_channel_mask_t channelMask,
846        audio_output_flags_t flags,
847        const audio_offload_info_t *offloadInfo)
848{
849    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
850    uint32_t latency = 0;
851    status_t status;
852
853#ifdef AUDIO_POLICY_TEST
854    if (mCurOutput != 0) {
855        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
856                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
857
858        if (mTestOutputs[mCurOutput] == 0) {
859            ALOGV("getOutput() opening test output");
860            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
861            outputDesc->mDevice = mTestDevice;
862            outputDesc->mLatency = mTestLatencyMs;
863            outputDesc->mFlags =
864                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
865            outputDesc->mRefCount[stream] = 0;
866            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
867            config.sample_rate = mTestSamplingRate;
868            config.channel_mask = mTestChannels;
869            config.format = mTestFormat;
870            if (offloadInfo != NULL) {
871                config.offload_info = *offloadInfo;
872            }
873            status = mpClientInterface->openOutput(0,
874                                                  &mTestOutputs[mCurOutput],
875                                                  &config,
876                                                  &outputDesc->mDevice,
877                                                  String8(""),
878                                                  &outputDesc->mLatency,
879                                                  outputDesc->mFlags);
880            if (status == NO_ERROR) {
881                outputDesc->mSamplingRate = config.sample_rate;
882                outputDesc->mFormat = config.format;
883                outputDesc->mChannelMask = config.channel_mask;
884                AudioParameter outputCmd = AudioParameter();
885                outputCmd.addInt(String8("set_id"),mCurOutput);
886                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
887                addOutput(mTestOutputs[mCurOutput], outputDesc);
888            }
889        }
890        return mTestOutputs[mCurOutput];
891    }
892#endif //AUDIO_POLICY_TEST
893
894    // open a direct output if required by specified parameters
895    //force direct flag if offload flag is set: offloading implies a direct output stream
896    // and all common behaviors are driven by checking only the direct flag
897    // this should normally be set appropriately in the policy configuration file
898    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
899        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
900    }
901    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
902        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
903    }
904
905    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
906    // creating an offloaded track and tearing it down immediately after start when audioflinger
907    // detects there is an active non offloadable effect.
908    // FIXME: We should check the audio session here but we do not have it in this context.
909    // This may prevent offloading in rare situations where effects are left active by apps
910    // in the background.
911    sp<IOProfile> profile;
912    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
913            !isNonOffloadableEffectEnabled()) {
914        profile = getProfileForDirectOutput(device,
915                                           samplingRate,
916                                           format,
917                                           channelMask,
918                                           (audio_output_flags_t)flags);
919    }
920
921    if (profile != 0) {
922        sp<AudioOutputDescriptor> outputDesc = NULL;
923
924        for (size_t i = 0; i < mOutputs.size(); i++) {
925            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
926            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
927                outputDesc = desc;
928                // reuse direct output if currently open and configured with same parameters
929                if ((samplingRate == outputDesc->mSamplingRate) &&
930                        (format == outputDesc->mFormat) &&
931                        (channelMask == outputDesc->mChannelMask)) {
932                    outputDesc->mDirectOpenCount++;
933                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
934                    return mOutputs.keyAt(i);
935                }
936            }
937        }
938        // close direct output if currently open and configured with different parameters
939        if (outputDesc != NULL) {
940            closeOutput(outputDesc->mIoHandle);
941        }
942        outputDesc = new AudioOutputDescriptor(profile);
943        outputDesc->mDevice = device;
944        outputDesc->mLatency = 0;
945        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
946        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
947        config.sample_rate = samplingRate;
948        config.channel_mask = channelMask;
949        config.format = format;
950        if (offloadInfo != NULL) {
951            config.offload_info = *offloadInfo;
952        }
953        status = mpClientInterface->openOutput(profile->mModule->mHandle,
954                                               &output,
955                                               &config,
956                                               &outputDesc->mDevice,
957                                               String8(""),
958                                               &outputDesc->mLatency,
959                                               outputDesc->mFlags);
960
961        // only accept an output with the requested parameters
962        if (status != NO_ERROR ||
963            (samplingRate != 0 && samplingRate != config.sample_rate) ||
964            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
965            (channelMask != 0 && channelMask != config.channel_mask)) {
966            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
967                    "format %d %d, channelMask %04x %04x", output, samplingRate,
968                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
969                    outputDesc->mChannelMask);
970            if (output != AUDIO_IO_HANDLE_NONE) {
971                mpClientInterface->closeOutput(output);
972            }
973            return AUDIO_IO_HANDLE_NONE;
974        }
975        outputDesc->mSamplingRate = config.sample_rate;
976        outputDesc->mChannelMask = config.channel_mask;
977        outputDesc->mFormat = config.format;
978        outputDesc->mRefCount[stream] = 0;
979        outputDesc->mStopTime[stream] = 0;
980        outputDesc->mDirectOpenCount = 1;
981
982        audio_io_handle_t srcOutput = getOutputForEffect();
983        addOutput(output, outputDesc);
984        audio_io_handle_t dstOutput = getOutputForEffect();
985        if (dstOutput == output) {
986            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
987        }
988        mPreviousOutputs = mOutputs;
989        ALOGV("getOutput() returns new direct output %d", output);
990        mpClientInterface->onAudioPortListUpdate();
991        return output;
992    }
993
994    // ignoring channel mask due to downmix capability in mixer
995
996    // open a non direct output
997
998    // for non direct outputs, only PCM is supported
999    if (audio_is_linear_pcm(format)) {
1000        // get which output is suitable for the specified stream. The actual
1001        // routing change will happen when startOutput() will be called
1002        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1003
1004        output = selectOutput(outputs, flags);
1005    }
1006    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1007            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1008
1009    ALOGV("getOutput() returns output %d", output);
1010
1011    return output;
1012}
1013
1014audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1015                                                       audio_output_flags_t flags)
1016{
1017    // select one output among several that provide a path to a particular device or set of
1018    // devices (the list was previously build by getOutputsForDevice()).
1019    // The priority is as follows:
1020    // 1: the output with the highest number of requested policy flags
1021    // 2: the primary output
1022    // 3: the first output in the list
1023
1024    if (outputs.size() == 0) {
1025        return 0;
1026    }
1027    if (outputs.size() == 1) {
1028        return outputs[0];
1029    }
1030
1031    int maxCommonFlags = 0;
1032    audio_io_handle_t outputFlags = 0;
1033    audio_io_handle_t outputPrimary = 0;
1034
1035    for (size_t i = 0; i < outputs.size(); i++) {
1036        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1037        if (!outputDesc->isDuplicated()) {
1038            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1039            if (commonFlags > maxCommonFlags) {
1040                outputFlags = outputs[i];
1041                maxCommonFlags = commonFlags;
1042                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1043            }
1044            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1045                outputPrimary = outputs[i];
1046            }
1047        }
1048    }
1049
1050    if (outputFlags != 0) {
1051        return outputFlags;
1052    }
1053    if (outputPrimary != 0) {
1054        return outputPrimary;
1055    }
1056
1057    return outputs[0];
1058}
1059
1060status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1061                                             audio_stream_type_t stream,
1062                                             int session)
1063{
1064    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1065    ssize_t index = mOutputs.indexOfKey(output);
1066    if (index < 0) {
1067        ALOGW("startOutput() unknown output %d", output);
1068        return BAD_VALUE;
1069    }
1070
1071    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1072
1073    // increment usage count for this stream on the requested output:
1074    // NOTE that the usage count is the same for duplicated output and hardware output which is
1075    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1076    outputDesc->changeRefCount(stream, 1);
1077
1078    if (outputDesc->mRefCount[stream] == 1) {
1079        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1080        routing_strategy strategy = getStrategy(stream);
1081        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1082                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
1083        uint32_t waitMs = 0;
1084        bool force = false;
1085        for (size_t i = 0; i < mOutputs.size(); i++) {
1086            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1087            if (desc != outputDesc) {
1088                // force a device change if any other output is managed by the same hw
1089                // module and has a current device selection that differs from selected device.
1090                // In this case, the audio HAL must receive the new device selection so that it can
1091                // change the device currently selected by the other active output.
1092                if (outputDesc->sharesHwModuleWith(desc) &&
1093                    desc->device() != newDevice) {
1094                    force = true;
1095                }
1096                // wait for audio on other active outputs to be presented when starting
1097                // a notification so that audio focus effect can propagate.
1098                uint32_t latency = desc->latency();
1099                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1100                    waitMs = latency;
1101                }
1102            }
1103        }
1104        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1105
1106        // handle special case for sonification while in call
1107        if (isInCall()) {
1108            handleIncallSonification(stream, true, false);
1109        }
1110
1111        // apply volume rules for current stream and device if necessary
1112        checkAndSetVolume(stream,
1113                          mStreams[stream].getVolumeIndex(newDevice),
1114                          output,
1115                          newDevice);
1116
1117        // update the outputs if starting an output with a stream that can affect notification
1118        // routing
1119        handleNotificationRoutingForStream(stream);
1120        if (waitMs > muteWaitMs) {
1121            usleep((waitMs - muteWaitMs) * 2 * 1000);
1122        }
1123    }
1124    return NO_ERROR;
1125}
1126
1127
1128status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1129                                            audio_stream_type_t stream,
1130                                            int session)
1131{
1132    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1133    ssize_t index = mOutputs.indexOfKey(output);
1134    if (index < 0) {
1135        ALOGW("stopOutput() unknown output %d", output);
1136        return BAD_VALUE;
1137    }
1138
1139    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1140
1141    // handle special case for sonification while in call
1142    if (isInCall()) {
1143        handleIncallSonification(stream, false, false);
1144    }
1145
1146    if (outputDesc->mRefCount[stream] > 0) {
1147        // decrement usage count of this stream on the output
1148        outputDesc->changeRefCount(stream, -1);
1149        // store time at which the stream was stopped - see isStreamActive()
1150        if (outputDesc->mRefCount[stream] == 0) {
1151            outputDesc->mStopTime[stream] = systemTime();
1152            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1153            // delay the device switch by twice the latency because stopOutput() is executed when
1154            // the track stop() command is received and at that time the audio track buffer can
1155            // still contain data that needs to be drained. The latency only covers the audio HAL
1156            // and kernel buffers. Also the latency does not always include additional delay in the
1157            // audio path (audio DSP, CODEC ...)
1158            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1159
1160            // force restoring the device selection on other active outputs if it differs from the
1161            // one being selected for this output
1162            for (size_t i = 0; i < mOutputs.size(); i++) {
1163                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1164                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1165                if (curOutput != output &&
1166                        desc->isActive() &&
1167                        outputDesc->sharesHwModuleWith(desc) &&
1168                        (newDevice != desc->device())) {
1169                    setOutputDevice(curOutput,
1170                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1171                                    true,
1172                                    outputDesc->mLatency*2);
1173                }
1174            }
1175            // update the outputs if stopping one with a stream that can affect notification routing
1176            handleNotificationRoutingForStream(stream);
1177        }
1178        return NO_ERROR;
1179    } else {
1180        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1181        return INVALID_OPERATION;
1182    }
1183}
1184
1185void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1186{
1187    ALOGV("releaseOutput() %d", output);
1188    ssize_t index = mOutputs.indexOfKey(output);
1189    if (index < 0) {
1190        ALOGW("releaseOutput() releasing unknown output %d", output);
1191        return;
1192    }
1193
1194#ifdef AUDIO_POLICY_TEST
1195    int testIndex = testOutputIndex(output);
1196    if (testIndex != 0) {
1197        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1198        if (outputDesc->isActive()) {
1199            mpClientInterface->closeOutput(output);
1200            mOutputs.removeItem(output);
1201            mTestOutputs[testIndex] = 0;
1202        }
1203        return;
1204    }
1205#endif //AUDIO_POLICY_TEST
1206
1207    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1208    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1209        if (desc->mDirectOpenCount <= 0) {
1210            ALOGW("releaseOutput() invalid open count %d for output %d",
1211                                                              desc->mDirectOpenCount, output);
1212            return;
1213        }
1214        if (--desc->mDirectOpenCount == 0) {
1215            closeOutput(output);
1216            // If effects where present on the output, audioflinger moved them to the primary
1217            // output by default: move them back to the appropriate output.
1218            audio_io_handle_t dstOutput = getOutputForEffect();
1219            if (dstOutput != mPrimaryOutput) {
1220                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1221            }
1222            mpClientInterface->onAudioPortListUpdate();
1223        }
1224    }
1225}
1226
1227
1228audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1229                                    uint32_t samplingRate,
1230                                    audio_format_t format,
1231                                    audio_channel_mask_t channelMask,
1232                                    audio_session_t session,
1233                                    audio_input_flags_t flags)
1234{
1235    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, session %d, "
1236          "flags %#x",
1237          inputSource, samplingRate, format, channelMask, session, flags);
1238
1239    audio_devices_t device = getDeviceForInputSource(inputSource);
1240
1241    if (device == AUDIO_DEVICE_NONE) {
1242        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1243        return AUDIO_IO_HANDLE_NONE;
1244    }
1245
1246    // adapt channel selection to input source
1247    switch (inputSource) {
1248    case AUDIO_SOURCE_VOICE_UPLINK:
1249        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1250        break;
1251    case AUDIO_SOURCE_VOICE_DOWNLINK:
1252        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1253        break;
1254    case AUDIO_SOURCE_VOICE_CALL:
1255        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1256        break;
1257    default:
1258        break;
1259    }
1260
1261    sp<IOProfile> profile = getInputProfile(device,
1262                                         samplingRate,
1263                                         format,
1264                                         channelMask,
1265                                         flags);
1266    if (profile == 0) {
1267        ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1268                "channelMask 0x%X, flags %#x",
1269                device, samplingRate, format, channelMask, flags);
1270        return AUDIO_IO_HANDLE_NONE;
1271    }
1272
1273    if (profile->mModule->mHandle == 0) {
1274        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1275        return AUDIO_IO_HANDLE_NONE;
1276    }
1277
1278    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1279    config.sample_rate = samplingRate;
1280    config.channel_mask = channelMask;
1281    config.format = format;
1282    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1283
1284    bool isSoundTrigger = false;
1285    if (inputSource == AUDIO_SOURCE_HOTWORD) {
1286        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1287        if (index >= 0) {
1288            input = mSoundTriggerSessions.valueFor(session);
1289            isSoundTrigger = true;
1290            ALOGV("SoundTrigger capture on session %d input %d", session, input);
1291        }
1292    }
1293
1294    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1295                                                   &input,
1296                                                   &config,
1297                                                   &device,
1298                                                   String8(""),
1299                                                   inputSource,
1300                                                   flags);
1301
1302    // only accept input with the exact requested set of parameters
1303    if (status != NO_ERROR ||
1304        (samplingRate != config.sample_rate) ||
1305        (format != config.format) ||
1306        (channelMask != config.channel_mask)) {
1307        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1308                samplingRate, format, channelMask);
1309        if (input != AUDIO_IO_HANDLE_NONE) {
1310            mpClientInterface->closeInput(input);
1311        }
1312        return AUDIO_IO_HANDLE_NONE;
1313    }
1314
1315    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1316    inputDesc->mInputSource = inputSource;
1317    inputDesc->mRefCount = 0;
1318    inputDesc->mOpenRefCount = 1;
1319    inputDesc->mSamplingRate = samplingRate;
1320    inputDesc->mFormat = format;
1321    inputDesc->mChannelMask = channelMask;
1322    inputDesc->mDevice = device;
1323    inputDesc->mSessions.add(session);
1324    inputDesc->mIsSoundTrigger = isSoundTrigger;
1325
1326    addInput(input, inputDesc);
1327    mpClientInterface->onAudioPortListUpdate();
1328    return input;
1329}
1330
1331status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1332                                        audio_session_t session)
1333{
1334    ALOGV("startInput() input %d", input);
1335    ssize_t index = mInputs.indexOfKey(input);
1336    if (index < 0) {
1337        ALOGW("startInput() unknown input %d", input);
1338        return BAD_VALUE;
1339    }
1340    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1341
1342    index = inputDesc->mSessions.indexOf(session);
1343    if (index < 0) {
1344        ALOGW("startInput() unknown session %d on input %d", session, input);
1345        return BAD_VALUE;
1346    }
1347
1348    // virtual input devices are compatible with other input devices
1349    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1350
1351        // for a non-virtual input device, check if there is another (non-virtual) active input
1352        audio_io_handle_t activeInput = getActiveInput();
1353        if (activeInput != 0 && activeInput != input) {
1354
1355            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1356            // otherwise the active input continues and the new input cannot be started.
1357            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1358            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1359                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1360                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1361                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1362            } else {
1363                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1364                return INVALID_OPERATION;
1365            }
1366        }
1367    }
1368
1369    if (inputDesc->mRefCount == 0) {
1370        if (activeInputsCount() == 0) {
1371            SoundTrigger::setCaptureState(true);
1372        }
1373        setInputDevice(input, getNewInputDevice(input), true /* force */);
1374
1375        // Automatically enable the remote submix output when input is started.
1376        // For remote submix (a virtual device), we open only one input per capture request.
1377        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1378            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1379                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1380        }
1381    }
1382
1383    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1384
1385    inputDesc->mRefCount++;
1386    return NO_ERROR;
1387}
1388
1389status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1390                                       audio_session_t session)
1391{
1392    ALOGV("stopInput() input %d", input);
1393    ssize_t index = mInputs.indexOfKey(input);
1394    if (index < 0) {
1395        ALOGW("stopInput() unknown input %d", input);
1396        return BAD_VALUE;
1397    }
1398    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1399
1400    index = inputDesc->mSessions.indexOf(session);
1401    if (index < 0) {
1402        ALOGW("stopInput() unknown session %d on input %d", session, input);
1403        return BAD_VALUE;
1404    }
1405
1406    if (inputDesc->mRefCount == 0) {
1407        ALOGW("stopInput() input %d already stopped", input);
1408        return INVALID_OPERATION;
1409    }
1410
1411    inputDesc->mRefCount--;
1412    if (inputDesc->mRefCount == 0) {
1413
1414        // automatically disable the remote submix output when input is stopped
1415        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1416            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1417                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1418        }
1419
1420        resetInputDevice(input);
1421
1422        if (activeInputsCount() == 0) {
1423            SoundTrigger::setCaptureState(false);
1424        }
1425    }
1426    return NO_ERROR;
1427}
1428
1429void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1430                                      audio_session_t session)
1431{
1432    ALOGV("releaseInput() %d", input);
1433    ssize_t index = mInputs.indexOfKey(input);
1434    if (index < 0) {
1435        ALOGW("releaseInput() releasing unknown input %d", input);
1436        return;
1437    }
1438    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1439    ALOG_ASSERT(inputDesc != 0);
1440
1441    index = inputDesc->mSessions.indexOf(session);
1442    if (index < 0) {
1443        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1444        return;
1445    }
1446    inputDesc->mSessions.remove(session);
1447    if (inputDesc->mOpenRefCount == 0) {
1448        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1449        return;
1450    }
1451    inputDesc->mOpenRefCount--;
1452    if (inputDesc->mOpenRefCount > 0) {
1453        ALOGV("releaseInput() exit > 0");
1454        return;
1455    }
1456
1457    mpClientInterface->closeInput(input);
1458    mInputs.removeItem(input);
1459    nextAudioPortGeneration();
1460    mpClientInterface->onAudioPortListUpdate();
1461    ALOGV("releaseInput() exit");
1462}
1463
1464void AudioPolicyManager::closeAllInputs() {
1465    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1466        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1467    }
1468    mInputs.clear();
1469    nextAudioPortGeneration();
1470}
1471
1472void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1473                                            int indexMin,
1474                                            int indexMax)
1475{
1476    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1477    if (indexMin < 0 || indexMin >= indexMax) {
1478        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1479        return;
1480    }
1481    mStreams[stream].mIndexMin = indexMin;
1482    mStreams[stream].mIndexMax = indexMax;
1483}
1484
1485status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1486                                                      int index,
1487                                                      audio_devices_t device)
1488{
1489
1490    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1491        return BAD_VALUE;
1492    }
1493    if (!audio_is_output_device(device)) {
1494        return BAD_VALUE;
1495    }
1496
1497    // Force max volume if stream cannot be muted
1498    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1499
1500    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1501          stream, device, index);
1502
1503    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1504    // clear all device specific values
1505    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1506        mStreams[stream].mIndexCur.clear();
1507    }
1508    mStreams[stream].mIndexCur.add(device, index);
1509
1510    // compute and apply stream volume on all outputs according to connected device
1511    status_t status = NO_ERROR;
1512    for (size_t i = 0; i < mOutputs.size(); i++) {
1513        audio_devices_t curDevice =
1514                getDeviceForVolume(mOutputs.valueAt(i)->device());
1515        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1516            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1517            if (volStatus != NO_ERROR) {
1518                status = volStatus;
1519            }
1520        }
1521    }
1522    return status;
1523}
1524
1525status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1526                                                      int *index,
1527                                                      audio_devices_t device)
1528{
1529    if (index == NULL) {
1530        return BAD_VALUE;
1531    }
1532    if (!audio_is_output_device(device)) {
1533        return BAD_VALUE;
1534    }
1535    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1536    // the strategy the stream belongs to.
1537    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1538        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1539    }
1540    device = getDeviceForVolume(device);
1541
1542    *index =  mStreams[stream].getVolumeIndex(device);
1543    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1544    return NO_ERROR;
1545}
1546
1547audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1548                                            const SortedVector<audio_io_handle_t>& outputs)
1549{
1550    // select one output among several suitable for global effects.
1551    // The priority is as follows:
1552    // 1: An offloaded output. If the effect ends up not being offloadable,
1553    //    AudioFlinger will invalidate the track and the offloaded output
1554    //    will be closed causing the effect to be moved to a PCM output.
1555    // 2: A deep buffer output
1556    // 3: the first output in the list
1557
1558    if (outputs.size() == 0) {
1559        return 0;
1560    }
1561
1562    audio_io_handle_t outputOffloaded = 0;
1563    audio_io_handle_t outputDeepBuffer = 0;
1564
1565    for (size_t i = 0; i < outputs.size(); i++) {
1566        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1567        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1568        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1569            outputOffloaded = outputs[i];
1570        }
1571        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1572            outputDeepBuffer = outputs[i];
1573        }
1574    }
1575
1576    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1577          outputOffloaded, outputDeepBuffer);
1578    if (outputOffloaded != 0) {
1579        return outputOffloaded;
1580    }
1581    if (outputDeepBuffer != 0) {
1582        return outputDeepBuffer;
1583    }
1584
1585    return outputs[0];
1586}
1587
1588audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1589{
1590    // apply simple rule where global effects are attached to the same output as MUSIC streams
1591
1592    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1593    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1594    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1595
1596    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1597    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1598          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1599
1600    return output;
1601}
1602
1603status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1604                                audio_io_handle_t io,
1605                                uint32_t strategy,
1606                                int session,
1607                                int id)
1608{
1609    ssize_t index = mOutputs.indexOfKey(io);
1610    if (index < 0) {
1611        index = mInputs.indexOfKey(io);
1612        if (index < 0) {
1613            ALOGW("registerEffect() unknown io %d", io);
1614            return INVALID_OPERATION;
1615        }
1616    }
1617
1618    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1619        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1620                desc->name, desc->memoryUsage);
1621        return INVALID_OPERATION;
1622    }
1623    mTotalEffectsMemory += desc->memoryUsage;
1624    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1625            desc->name, io, strategy, session, id);
1626    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1627
1628    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1629    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1630    effectDesc->mIo = io;
1631    effectDesc->mStrategy = (routing_strategy)strategy;
1632    effectDesc->mSession = session;
1633    effectDesc->mEnabled = false;
1634
1635    mEffects.add(id, effectDesc);
1636
1637    return NO_ERROR;
1638}
1639
1640status_t AudioPolicyManager::unregisterEffect(int id)
1641{
1642    ssize_t index = mEffects.indexOfKey(id);
1643    if (index < 0) {
1644        ALOGW("unregisterEffect() unknown effect ID %d", id);
1645        return INVALID_OPERATION;
1646    }
1647
1648    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1649
1650    setEffectEnabled(effectDesc, false);
1651
1652    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1653        ALOGW("unregisterEffect() memory %d too big for total %d",
1654                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1655        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1656    }
1657    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1658    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1659            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1660
1661    mEffects.removeItem(id);
1662
1663    return NO_ERROR;
1664}
1665
1666status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1667{
1668    ssize_t index = mEffects.indexOfKey(id);
1669    if (index < 0) {
1670        ALOGW("unregisterEffect() unknown effect ID %d", id);
1671        return INVALID_OPERATION;
1672    }
1673
1674    return setEffectEnabled(mEffects.valueAt(index), enabled);
1675}
1676
1677status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1678{
1679    if (enabled == effectDesc->mEnabled) {
1680        ALOGV("setEffectEnabled(%s) effect already %s",
1681             enabled?"true":"false", enabled?"enabled":"disabled");
1682        return INVALID_OPERATION;
1683    }
1684
1685    if (enabled) {
1686        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1687            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1688                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1689            return INVALID_OPERATION;
1690        }
1691        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1692        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1693    } else {
1694        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1695            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1696                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1697            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1698        }
1699        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1700        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1701    }
1702    effectDesc->mEnabled = enabled;
1703    return NO_ERROR;
1704}
1705
1706bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1707{
1708    for (size_t i = 0; i < mEffects.size(); i++) {
1709        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1710        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1711                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1712            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1713                  effectDesc->mDesc.name, effectDesc->mSession);
1714            return true;
1715        }
1716    }
1717    return false;
1718}
1719
1720bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1721{
1722    nsecs_t sysTime = systemTime();
1723    for (size_t i = 0; i < mOutputs.size(); i++) {
1724        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1725        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1726            return true;
1727        }
1728    }
1729    return false;
1730}
1731
1732bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1733                                                    uint32_t inPastMs) const
1734{
1735    nsecs_t sysTime = systemTime();
1736    for (size_t i = 0; i < mOutputs.size(); i++) {
1737        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1738        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1739                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1740            return true;
1741        }
1742    }
1743    return false;
1744}
1745
1746bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1747{
1748    for (size_t i = 0; i < mInputs.size(); i++) {
1749        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1750        if ((inputDescriptor->mInputSource == (int)source ||
1751                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1752                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1753             && (inputDescriptor->mRefCount > 0)) {
1754            return true;
1755        }
1756    }
1757    return false;
1758}
1759
1760
1761status_t AudioPolicyManager::dump(int fd)
1762{
1763    const size_t SIZE = 256;
1764    char buffer[SIZE];
1765    String8 result;
1766
1767    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1768    result.append(buffer);
1769
1770    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1771    result.append(buffer);
1772    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1773    result.append(buffer);
1774    snprintf(buffer, SIZE, " Force use for communications %d\n",
1775             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1776    result.append(buffer);
1777    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1778    result.append(buffer);
1779    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1780    result.append(buffer);
1781    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1782    result.append(buffer);
1783    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1784    result.append(buffer);
1785    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1786            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1787    result.append(buffer);
1788
1789    snprintf(buffer, SIZE, " Available output devices:\n");
1790    result.append(buffer);
1791    write(fd, result.string(), result.size());
1792    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1793        mAvailableOutputDevices[i]->dump(fd, 2, i);
1794    }
1795    snprintf(buffer, SIZE, "\n Available input devices:\n");
1796    write(fd, buffer, strlen(buffer));
1797    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1798        mAvailableInputDevices[i]->dump(fd, 2, i);
1799    }
1800
1801    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1802    write(fd, buffer, strlen(buffer));
1803    for (size_t i = 0; i < mHwModules.size(); i++) {
1804        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1805        write(fd, buffer, strlen(buffer));
1806        mHwModules[i]->dump(fd);
1807    }
1808
1809    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1810    write(fd, buffer, strlen(buffer));
1811    for (size_t i = 0; i < mOutputs.size(); i++) {
1812        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1813        write(fd, buffer, strlen(buffer));
1814        mOutputs.valueAt(i)->dump(fd);
1815    }
1816
1817    snprintf(buffer, SIZE, "\nInputs dump:\n");
1818    write(fd, buffer, strlen(buffer));
1819    for (size_t i = 0; i < mInputs.size(); i++) {
1820        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1821        write(fd, buffer, strlen(buffer));
1822        mInputs.valueAt(i)->dump(fd);
1823    }
1824
1825    snprintf(buffer, SIZE, "\nStreams dump:\n");
1826    write(fd, buffer, strlen(buffer));
1827    snprintf(buffer, SIZE,
1828             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1829    write(fd, buffer, strlen(buffer));
1830    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1831        snprintf(buffer, SIZE, " %02zu      ", i);
1832        write(fd, buffer, strlen(buffer));
1833        mStreams[i].dump(fd);
1834    }
1835
1836    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1837            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1838    write(fd, buffer, strlen(buffer));
1839
1840    snprintf(buffer, SIZE, "Registered effects:\n");
1841    write(fd, buffer, strlen(buffer));
1842    for (size_t i = 0; i < mEffects.size(); i++) {
1843        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1844        write(fd, buffer, strlen(buffer));
1845        mEffects.valueAt(i)->dump(fd);
1846    }
1847
1848
1849    return NO_ERROR;
1850}
1851
1852// This function checks for the parameters which can be offloaded.
1853// This can be enhanced depending on the capability of the DSP and policy
1854// of the system.
1855bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1856{
1857    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1858     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1859     offloadInfo.sample_rate, offloadInfo.channel_mask,
1860     offloadInfo.format,
1861     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1862     offloadInfo.has_video);
1863
1864    // Check if offload has been disabled
1865    char propValue[PROPERTY_VALUE_MAX];
1866    if (property_get("audio.offload.disable", propValue, "0")) {
1867        if (atoi(propValue) != 0) {
1868            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1869            return false;
1870        }
1871    }
1872
1873    // Check if stream type is music, then only allow offload as of now.
1874    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1875    {
1876        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1877        return false;
1878    }
1879
1880    //TODO: enable audio offloading with video when ready
1881    if (offloadInfo.has_video)
1882    {
1883        ALOGV("isOffloadSupported: has_video == true, returning false");
1884        return false;
1885    }
1886
1887    //If duration is less than minimum value defined in property, return false
1888    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1889        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1890            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1891            return false;
1892        }
1893    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1894        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1895        return false;
1896    }
1897
1898    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1899    // creating an offloaded track and tearing it down immediately after start when audioflinger
1900    // detects there is an active non offloadable effect.
1901    // FIXME: We should check the audio session here but we do not have it in this context.
1902    // This may prevent offloading in rare situations where effects are left active by apps
1903    // in the background.
1904    if (isNonOffloadableEffectEnabled()) {
1905        return false;
1906    }
1907
1908    // See if there is a profile to support this.
1909    // AUDIO_DEVICE_NONE
1910    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1911                                            offloadInfo.sample_rate,
1912                                            offloadInfo.format,
1913                                            offloadInfo.channel_mask,
1914                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1915    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1916    return (profile != 0);
1917}
1918
1919status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1920                                            audio_port_type_t type,
1921                                            unsigned int *num_ports,
1922                                            struct audio_port *ports,
1923                                            unsigned int *generation)
1924{
1925    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1926            generation == NULL) {
1927        return BAD_VALUE;
1928    }
1929    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1930    if (ports == NULL) {
1931        *num_ports = 0;
1932    }
1933
1934    size_t portsWritten = 0;
1935    size_t portsMax = *num_ports;
1936    *num_ports = 0;
1937    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1938        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1939            for (size_t i = 0;
1940                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1941                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1942            }
1943            *num_ports += mAvailableOutputDevices.size();
1944        }
1945        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1946            for (size_t i = 0;
1947                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1948                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1949            }
1950            *num_ports += mAvailableInputDevices.size();
1951        }
1952    }
1953    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1954        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1955            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1956                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1957            }
1958            *num_ports += mInputs.size();
1959        }
1960        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1961            size_t numOutputs = 0;
1962            for (size_t i = 0; i < mOutputs.size(); i++) {
1963                if (!mOutputs[i]->isDuplicated()) {
1964                    numOutputs++;
1965                    if (portsWritten < portsMax) {
1966                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
1967                    }
1968                }
1969            }
1970            *num_ports += numOutputs;
1971        }
1972    }
1973    *generation = curAudioPortGeneration();
1974    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
1975    return NO_ERROR;
1976}
1977
1978status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
1979{
1980    return NO_ERROR;
1981}
1982
1983sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
1984                                                                    audio_port_handle_t id) const
1985{
1986    sp<AudioOutputDescriptor> outputDesc = NULL;
1987    for (size_t i = 0; i < mOutputs.size(); i++) {
1988        outputDesc = mOutputs.valueAt(i);
1989        if (outputDesc->mId == id) {
1990            break;
1991        }
1992    }
1993    return outputDesc;
1994}
1995
1996sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
1997                                                                    audio_port_handle_t id) const
1998{
1999    sp<AudioInputDescriptor> inputDesc = NULL;
2000    for (size_t i = 0; i < mInputs.size(); i++) {
2001        inputDesc = mInputs.valueAt(i);
2002        if (inputDesc->mId == id) {
2003            break;
2004        }
2005    }
2006    return inputDesc;
2007}
2008
2009sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2010                                                                    audio_devices_t device) const
2011{
2012    sp <HwModule> module;
2013
2014    for (size_t i = 0; i < mHwModules.size(); i++) {
2015        if (mHwModules[i]->mHandle == 0) {
2016            continue;
2017        }
2018        if (audio_is_output_device(device)) {
2019            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2020            {
2021                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2022                    return mHwModules[i];
2023                }
2024            }
2025        } else {
2026            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2027                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2028                        device & ~AUDIO_DEVICE_BIT_IN) {
2029                    return mHwModules[i];
2030                }
2031            }
2032        }
2033    }
2034    return module;
2035}
2036
2037sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2038{
2039    sp <HwModule> module;
2040
2041    for (size_t i = 0; i < mHwModules.size(); i++)
2042    {
2043        if (strcmp(mHwModules[i]->mName, name) == 0) {
2044            return mHwModules[i];
2045        }
2046    }
2047    return module;
2048}
2049
2050audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2051{
2052    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2053    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2054    return devices & mAvailableOutputDevices.types();
2055}
2056
2057audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2058{
2059    audio_module_handle_t primaryHandle =
2060                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2061    audio_devices_t devices = AUDIO_DEVICE_NONE;
2062    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2063        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2064            devices |= mAvailableInputDevices[i]->mDeviceType;
2065        }
2066    }
2067    return devices;
2068}
2069
2070status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2071                                               audio_patch_handle_t *handle,
2072                                               uid_t uid)
2073{
2074    ALOGV("createAudioPatch()");
2075
2076    if (handle == NULL || patch == NULL) {
2077        return BAD_VALUE;
2078    }
2079    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2080
2081    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2082            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2083        return BAD_VALUE;
2084    }
2085    // only one source per audio patch supported for now
2086    if (patch->num_sources > 1) {
2087        return INVALID_OPERATION;
2088    }
2089
2090    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2091        return INVALID_OPERATION;
2092    }
2093    for (size_t i = 0; i < patch->num_sinks; i++) {
2094        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2095            return INVALID_OPERATION;
2096        }
2097    }
2098
2099    sp<AudioPatch> patchDesc;
2100    ssize_t index = mAudioPatches.indexOfKey(*handle);
2101
2102    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2103                                                           patch->sources[0].role,
2104                                                           patch->sources[0].type);
2105#if LOG_NDEBUG == 0
2106    for (size_t i = 0; i < patch->num_sinks; i++) {
2107        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2108                                                             patch->sinks[i].role,
2109                                                             patch->sinks[i].type);
2110    }
2111#endif
2112
2113    if (index >= 0) {
2114        patchDesc = mAudioPatches.valueAt(index);
2115        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2116                                                                  mUidCached, patchDesc->mUid, uid);
2117        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2118            return INVALID_OPERATION;
2119        }
2120    } else {
2121        *handle = 0;
2122    }
2123
2124    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2125        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2126        if (outputDesc == NULL) {
2127            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2128            return BAD_VALUE;
2129        }
2130        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2131                                                outputDesc->mIoHandle);
2132        if (patchDesc != 0) {
2133            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2134                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2135                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2136                return BAD_VALUE;
2137            }
2138        }
2139        DeviceVector devices;
2140        for (size_t i = 0; i < patch->num_sinks; i++) {
2141            // Only support mix to devices connection
2142            // TODO add support for mix to mix connection
2143            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2144                ALOGV("createAudioPatch() source mix but sink is not a device");
2145                return INVALID_OPERATION;
2146            }
2147            sp<DeviceDescriptor> devDesc =
2148                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2149            if (devDesc == 0) {
2150                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2151                return BAD_VALUE;
2152            }
2153
2154            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2155                                                           patch->sources[0].sample_rate,
2156                                                         NULL,  // updatedSamplingRate
2157                                                         patch->sources[0].format,
2158                                                         patch->sources[0].channel_mask,
2159                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2160                ALOGV("createAudioPatch() profile not supported for device %08x",
2161                      devDesc->mDeviceType);
2162                return INVALID_OPERATION;
2163            }
2164            devices.add(devDesc);
2165        }
2166        if (devices.size() == 0) {
2167            return INVALID_OPERATION;
2168        }
2169
2170        // TODO: reconfigure output format and channels here
2171        ALOGV("createAudioPatch() setting device %08x on output %d",
2172              devices.types(), outputDesc->mIoHandle);
2173        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2174        index = mAudioPatches.indexOfKey(*handle);
2175        if (index >= 0) {
2176            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2177                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2178            }
2179            patchDesc = mAudioPatches.valueAt(index);
2180            patchDesc->mUid = uid;
2181            ALOGV("createAudioPatch() success");
2182        } else {
2183            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2184            return INVALID_OPERATION;
2185        }
2186    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2187        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2188            // input device to input mix connection
2189            // only one sink supported when connecting an input device to a mix
2190            if (patch->num_sinks > 1) {
2191                return INVALID_OPERATION;
2192            }
2193            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2194            if (inputDesc == NULL) {
2195                return BAD_VALUE;
2196            }
2197            if (patchDesc != 0) {
2198                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2199                    return BAD_VALUE;
2200                }
2201            }
2202            sp<DeviceDescriptor> devDesc =
2203                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2204            if (devDesc == 0) {
2205                return BAD_VALUE;
2206            }
2207
2208            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2209                                                         patch->sinks[0].sample_rate,
2210                                                         NULL, /*updatedSampleRate*/
2211                                                         patch->sinks[0].format,
2212                                                         patch->sinks[0].channel_mask,
2213                                                         // FIXME for the parameter type,
2214                                                         // and the NONE
2215                                                         (audio_output_flags_t)
2216                                                            AUDIO_INPUT_FLAG_NONE)) {
2217                return INVALID_OPERATION;
2218            }
2219            // TODO: reconfigure output format and channels here
2220            ALOGV("createAudioPatch() setting device %08x on output %d",
2221                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2222            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2223            index = mAudioPatches.indexOfKey(*handle);
2224            if (index >= 0) {
2225                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2226                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2227                }
2228                patchDesc = mAudioPatches.valueAt(index);
2229                patchDesc->mUid = uid;
2230                ALOGV("createAudioPatch() success");
2231            } else {
2232                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2233                return INVALID_OPERATION;
2234            }
2235        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2236            // device to device connection
2237            if (patchDesc != 0) {
2238                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2239                    return BAD_VALUE;
2240                }
2241            }
2242            sp<DeviceDescriptor> srcDeviceDesc =
2243                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2244
2245            //update source and sink with our own data as the data passed in the patch may
2246            // be incomplete.
2247            struct audio_patch newPatch = *patch;
2248            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2249            if (srcDeviceDesc == 0) {
2250                return BAD_VALUE;
2251            }
2252
2253            for (size_t i = 0; i < patch->num_sinks; i++) {
2254                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2255                    ALOGV("createAudioPatch() source device but one sink is not a device");
2256                    return INVALID_OPERATION;
2257                }
2258
2259                sp<DeviceDescriptor> sinkDeviceDesc =
2260                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2261                if (sinkDeviceDesc == 0) {
2262                    return BAD_VALUE;
2263                }
2264                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2265
2266                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2267                    // only one sink supported when connected devices across HW modules
2268                    if (patch->num_sinks > 1) {
2269                        return INVALID_OPERATION;
2270                    }
2271                    SortedVector<audio_io_handle_t> outputs =
2272                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2273                                                                mOutputs);
2274                    // if the sink device is reachable via an opened output stream, request to go via
2275                    // this output stream by adding a second source to the patch description
2276                    audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
2277                    if (output != AUDIO_IO_HANDLE_NONE) {
2278                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2279                        if (outputDesc->isDuplicated()) {
2280                            return INVALID_OPERATION;
2281                        }
2282                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2283                        newPatch.num_sources = 2;
2284                    }
2285                }
2286            }
2287            // TODO: check from routing capabilities in config file and other conflicting patches
2288
2289            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2290            if (index >= 0) {
2291                afPatchHandle = patchDesc->mAfPatchHandle;
2292            }
2293
2294            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2295                                                                  &afPatchHandle,
2296                                                                  0);
2297            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2298                                                                  status, afPatchHandle);
2299            if (status == NO_ERROR) {
2300                if (index < 0) {
2301                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2302                                               &newPatch, uid);
2303                    addAudioPatch(patchDesc->mHandle, patchDesc);
2304                } else {
2305                    patchDesc->mPatch = newPatch;
2306                }
2307                patchDesc->mAfPatchHandle = afPatchHandle;
2308                *handle = patchDesc->mHandle;
2309                nextAudioPortGeneration();
2310                mpClientInterface->onAudioPatchListUpdate();
2311            } else {
2312                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2313                status);
2314                return INVALID_OPERATION;
2315            }
2316        } else {
2317            return BAD_VALUE;
2318        }
2319    } else {
2320        return BAD_VALUE;
2321    }
2322    return NO_ERROR;
2323}
2324
2325status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2326                                                  uid_t uid)
2327{
2328    ALOGV("releaseAudioPatch() patch %d", handle);
2329
2330    ssize_t index = mAudioPatches.indexOfKey(handle);
2331
2332    if (index < 0) {
2333        return BAD_VALUE;
2334    }
2335    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2336    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2337          mUidCached, patchDesc->mUid, uid);
2338    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2339        return INVALID_OPERATION;
2340    }
2341
2342    struct audio_patch *patch = &patchDesc->mPatch;
2343    patchDesc->mUid = mUidCached;
2344    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2345        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2346        if (outputDesc == NULL) {
2347            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2348            return BAD_VALUE;
2349        }
2350
2351        setOutputDevice(outputDesc->mIoHandle,
2352                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2353                       true,
2354                       0,
2355                       NULL);
2356    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2357        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2358            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2359            if (inputDesc == NULL) {
2360                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2361                return BAD_VALUE;
2362            }
2363            setInputDevice(inputDesc->mIoHandle,
2364                           getNewInputDevice(inputDesc->mIoHandle),
2365                           true,
2366                           NULL);
2367        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2368            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2369            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2370            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2371                                                              status, patchDesc->mAfPatchHandle);
2372            removeAudioPatch(patchDesc->mHandle);
2373            nextAudioPortGeneration();
2374            mpClientInterface->onAudioPatchListUpdate();
2375        } else {
2376            return BAD_VALUE;
2377        }
2378    } else {
2379        return BAD_VALUE;
2380    }
2381    return NO_ERROR;
2382}
2383
2384status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2385                                              struct audio_patch *patches,
2386                                              unsigned int *generation)
2387{
2388    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2389            generation == NULL) {
2390        return BAD_VALUE;
2391    }
2392    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2393          *num_patches, patches, mAudioPatches.size());
2394    if (patches == NULL) {
2395        *num_patches = 0;
2396    }
2397
2398    size_t patchesWritten = 0;
2399    size_t patchesMax = *num_patches;
2400    for (size_t i = 0;
2401            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2402        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2403        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2404        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2405              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2406    }
2407    *num_patches = mAudioPatches.size();
2408
2409    *generation = curAudioPortGeneration();
2410    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2411    return NO_ERROR;
2412}
2413
2414status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2415{
2416    ALOGV("setAudioPortConfig()");
2417
2418    if (config == NULL) {
2419        return BAD_VALUE;
2420    }
2421    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2422    // Only support gain configuration for now
2423    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2424        return INVALID_OPERATION;
2425    }
2426
2427    sp<AudioPortConfig> audioPortConfig;
2428    if (config->type == AUDIO_PORT_TYPE_MIX) {
2429        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2430            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2431            if (outputDesc == NULL) {
2432                return BAD_VALUE;
2433            }
2434            ALOG_ASSERT(!outputDesc->isDuplicated(),
2435                        "setAudioPortConfig() called on duplicated output %d",
2436                        outputDesc->mIoHandle);
2437            audioPortConfig = outputDesc;
2438        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2439            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2440            if (inputDesc == NULL) {
2441                return BAD_VALUE;
2442            }
2443            audioPortConfig = inputDesc;
2444        } else {
2445            return BAD_VALUE;
2446        }
2447    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2448        sp<DeviceDescriptor> deviceDesc;
2449        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2450            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2451        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2452            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2453        } else {
2454            return BAD_VALUE;
2455        }
2456        if (deviceDesc == NULL) {
2457            return BAD_VALUE;
2458        }
2459        audioPortConfig = deviceDesc;
2460    } else {
2461        return BAD_VALUE;
2462    }
2463
2464    struct audio_port_config backupConfig;
2465    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2466    if (status == NO_ERROR) {
2467        struct audio_port_config newConfig;
2468        audioPortConfig->toAudioPortConfig(&newConfig, config);
2469        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2470    }
2471    if (status != NO_ERROR) {
2472        audioPortConfig->applyAudioPortConfig(&backupConfig);
2473    }
2474
2475    return status;
2476}
2477
2478void AudioPolicyManager::clearAudioPatches(uid_t uid)
2479{
2480    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2481        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2482        if (patchDesc->mUid == uid) {
2483            // releaseAudioPatch() removes the patch from mAudioPatches
2484            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2485                i--;
2486            }
2487        }
2488    }
2489}
2490
2491status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2492                                       audio_io_handle_t *ioHandle,
2493                                       audio_devices_t *device)
2494{
2495    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2496    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2497    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2498
2499    mSoundTriggerSessions.add(*session, *ioHandle);
2500
2501    return NO_ERROR;
2502}
2503
2504status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2505{
2506    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2507    if (index < 0) {
2508        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2509        return BAD_VALUE;
2510    }
2511
2512    mSoundTriggerSessions.removeItem(session);
2513    return NO_ERROR;
2514}
2515
2516status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2517                                           const sp<AudioPatch>& patch)
2518{
2519    ssize_t index = mAudioPatches.indexOfKey(handle);
2520
2521    if (index >= 0) {
2522        ALOGW("addAudioPatch() patch %d already in", handle);
2523        return ALREADY_EXISTS;
2524    }
2525    mAudioPatches.add(handle, patch);
2526    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2527            "sink handle %d",
2528          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2529          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2530    return NO_ERROR;
2531}
2532
2533status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2534{
2535    ssize_t index = mAudioPatches.indexOfKey(handle);
2536
2537    if (index < 0) {
2538        ALOGW("removeAudioPatch() patch %d not in", handle);
2539        return ALREADY_EXISTS;
2540    }
2541    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2542                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2543    mAudioPatches.removeItemsAt(index);
2544    return NO_ERROR;
2545}
2546
2547// ----------------------------------------------------------------------------
2548// AudioPolicyManager
2549// ----------------------------------------------------------------------------
2550
2551uint32_t AudioPolicyManager::nextUniqueId()
2552{
2553    return android_atomic_inc(&mNextUniqueId);
2554}
2555
2556uint32_t AudioPolicyManager::nextAudioPortGeneration()
2557{
2558    return android_atomic_inc(&mAudioPortGeneration);
2559}
2560
2561AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2562    :
2563#ifdef AUDIO_POLICY_TEST
2564    Thread(false),
2565#endif //AUDIO_POLICY_TEST
2566    mPrimaryOutput((audio_io_handle_t)0),
2567    mPhoneState(AUDIO_MODE_NORMAL),
2568    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2569    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2570    mA2dpSuspended(false),
2571    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2572    mAudioPortGeneration(1)
2573{
2574    mUidCached = getuid();
2575    mpClientInterface = clientInterface;
2576
2577    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2578        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2579    }
2580
2581    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2582    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2583        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2584            ALOGE("could not load audio policy configuration file, setting defaults");
2585            defaultAudioPolicyConfig();
2586        }
2587    }
2588    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2589
2590    // must be done after reading the policy
2591    initializeVolumeCurves();
2592
2593    // open all output streams needed to access attached devices
2594    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2595    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2596    for (size_t i = 0; i < mHwModules.size(); i++) {
2597        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2598        if (mHwModules[i]->mHandle == 0) {
2599            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2600            continue;
2601        }
2602        // open all output streams needed to access attached devices
2603        // except for direct output streams that are only opened when they are actually
2604        // required by an app.
2605        // This also validates mAvailableOutputDevices list
2606        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2607        {
2608            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2609
2610            if (outProfile->mSupportedDevices.isEmpty()) {
2611                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2612                continue;
2613            }
2614
2615            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2616            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2617                profileType = mDefaultOutputDevice->mDeviceType;
2618            } else {
2619                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2620            }
2621            if ((profileType & outputDeviceTypes) &&
2622                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2623                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2624
2625                outputDesc->mDevice = profileType;
2626                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2627                config.sample_rate = outputDesc->mSamplingRate;
2628                config.channel_mask = outputDesc->mChannelMask;
2629                config.format = outputDesc->mFormat;
2630                audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2631                status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2632                                                                &output,
2633                                                                &config,
2634                                                                &outputDesc->mDevice,
2635                                                                String8(""),
2636                                                                &outputDesc->mLatency,
2637                                                                outputDesc->mFlags);
2638
2639                if (status != NO_ERROR) {
2640                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2641                          outputDesc->mDevice,
2642                          mHwModules[i]->mName);
2643                } else {
2644                    outputDesc->mSamplingRate = config.sample_rate;
2645                    outputDesc->mChannelMask = config.channel_mask;
2646                    outputDesc->mFormat = config.format;
2647
2648                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2649                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2650                        ssize_t index =
2651                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2652                        // give a valid ID to an attached device once confirmed it is reachable
2653                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2654                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2655                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2656                        }
2657                    }
2658                    if (mPrimaryOutput == 0 &&
2659                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2660                        mPrimaryOutput = output;
2661                    }
2662                    addOutput(output, outputDesc);
2663                    setOutputDevice(output,
2664                                    outputDesc->mDevice,
2665                                    true);
2666                }
2667            }
2668        }
2669        // open input streams needed to access attached devices to validate
2670        // mAvailableInputDevices list
2671        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2672        {
2673            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2674
2675            if (inProfile->mSupportedDevices.isEmpty()) {
2676                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2677                continue;
2678            }
2679
2680            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2681            if (profileType & inputDeviceTypes) {
2682                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2683
2684                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2685                inputDesc->mDevice = profileType;
2686
2687                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2688                config.sample_rate = inputDesc->mSamplingRate;
2689                config.channel_mask = inputDesc->mChannelMask;
2690                config.format = inputDesc->mFormat;
2691                audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2692                status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2693                                                               &input,
2694                                                               &config,
2695                                                               &inputDesc->mDevice,
2696                                                               String8(""),
2697                                                               AUDIO_SOURCE_MIC,
2698                                                               AUDIO_INPUT_FLAG_NONE);
2699
2700                if (status == NO_ERROR) {
2701                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2702                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2703                        ssize_t index =
2704                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2705                        // give a valid ID to an attached device once confirmed it is reachable
2706                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2707                            mAvailableInputDevices[index]->mId = nextUniqueId();
2708                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2709                        }
2710                    }
2711                    mpClientInterface->closeInput(input);
2712                } else {
2713                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2714                          inputDesc->mDevice,
2715                          mHwModules[i]->mName);
2716                }
2717            }
2718        }
2719    }
2720    // make sure all attached devices have been allocated a unique ID
2721    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2722        if (mAvailableOutputDevices[i]->mId == 0) {
2723            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2724            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2725            continue;
2726        }
2727        i++;
2728    }
2729    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2730        if (mAvailableInputDevices[i]->mId == 0) {
2731            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2732            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2733            continue;
2734        }
2735        i++;
2736    }
2737    // make sure default device is reachable
2738    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2739        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2740    }
2741
2742    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2743
2744    updateDevicesAndOutputs();
2745
2746#ifdef AUDIO_POLICY_TEST
2747    if (mPrimaryOutput != 0) {
2748        AudioParameter outputCmd = AudioParameter();
2749        outputCmd.addInt(String8("set_id"), 0);
2750        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2751
2752        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2753        mTestSamplingRate = 44100;
2754        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2755        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2756        mTestLatencyMs = 0;
2757        mCurOutput = 0;
2758        mDirectOutput = false;
2759        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2760            mTestOutputs[i] = 0;
2761        }
2762
2763        const size_t SIZE = 256;
2764        char buffer[SIZE];
2765        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2766        run(buffer, ANDROID_PRIORITY_AUDIO);
2767    }
2768#endif //AUDIO_POLICY_TEST
2769}
2770
2771AudioPolicyManager::~AudioPolicyManager()
2772{
2773#ifdef AUDIO_POLICY_TEST
2774    exit();
2775#endif //AUDIO_POLICY_TEST
2776   for (size_t i = 0; i < mOutputs.size(); i++) {
2777        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2778   }
2779   for (size_t i = 0; i < mInputs.size(); i++) {
2780        mpClientInterface->closeInput(mInputs.keyAt(i));
2781   }
2782   mAvailableOutputDevices.clear();
2783   mAvailableInputDevices.clear();
2784   mOutputs.clear();
2785   mInputs.clear();
2786   mHwModules.clear();
2787}
2788
2789status_t AudioPolicyManager::initCheck()
2790{
2791    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2792}
2793
2794#ifdef AUDIO_POLICY_TEST
2795bool AudioPolicyManager::threadLoop()
2796{
2797    ALOGV("entering threadLoop()");
2798    while (!exitPending())
2799    {
2800        String8 command;
2801        int valueInt;
2802        String8 value;
2803
2804        Mutex::Autolock _l(mLock);
2805        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2806
2807        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2808        AudioParameter param = AudioParameter(command);
2809
2810        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2811            valueInt != 0) {
2812            ALOGV("Test command %s received", command.string());
2813            String8 target;
2814            if (param.get(String8("target"), target) != NO_ERROR) {
2815                target = "Manager";
2816            }
2817            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2818                param.remove(String8("test_cmd_policy_output"));
2819                mCurOutput = valueInt;
2820            }
2821            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2822                param.remove(String8("test_cmd_policy_direct"));
2823                if (value == "false") {
2824                    mDirectOutput = false;
2825                } else if (value == "true") {
2826                    mDirectOutput = true;
2827                }
2828            }
2829            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2830                param.remove(String8("test_cmd_policy_input"));
2831                mTestInput = valueInt;
2832            }
2833
2834            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2835                param.remove(String8("test_cmd_policy_format"));
2836                int format = AUDIO_FORMAT_INVALID;
2837                if (value == "PCM 16 bits") {
2838                    format = AUDIO_FORMAT_PCM_16_BIT;
2839                } else if (value == "PCM 8 bits") {
2840                    format = AUDIO_FORMAT_PCM_8_BIT;
2841                } else if (value == "Compressed MP3") {
2842                    format = AUDIO_FORMAT_MP3;
2843                }
2844                if (format != AUDIO_FORMAT_INVALID) {
2845                    if (target == "Manager") {
2846                        mTestFormat = format;
2847                    } else if (mTestOutputs[mCurOutput] != 0) {
2848                        AudioParameter outputParam = AudioParameter();
2849                        outputParam.addInt(String8("format"), format);
2850                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2851                    }
2852                }
2853            }
2854            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2855                param.remove(String8("test_cmd_policy_channels"));
2856                int channels = 0;
2857
2858                if (value == "Channels Stereo") {
2859                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2860                } else if (value == "Channels Mono") {
2861                    channels =  AUDIO_CHANNEL_OUT_MONO;
2862                }
2863                if (channels != 0) {
2864                    if (target == "Manager") {
2865                        mTestChannels = channels;
2866                    } else if (mTestOutputs[mCurOutput] != 0) {
2867                        AudioParameter outputParam = AudioParameter();
2868                        outputParam.addInt(String8("channels"), channels);
2869                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2870                    }
2871                }
2872            }
2873            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2874                param.remove(String8("test_cmd_policy_sampleRate"));
2875                if (valueInt >= 0 && valueInt <= 96000) {
2876                    int samplingRate = valueInt;
2877                    if (target == "Manager") {
2878                        mTestSamplingRate = samplingRate;
2879                    } else if (mTestOutputs[mCurOutput] != 0) {
2880                        AudioParameter outputParam = AudioParameter();
2881                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2882                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2883                    }
2884                }
2885            }
2886
2887            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2888                param.remove(String8("test_cmd_policy_reopen"));
2889
2890                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2891                mpClientInterface->closeOutput(mPrimaryOutput);
2892
2893                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2894
2895                mOutputs.removeItem(mPrimaryOutput);
2896
2897                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2898                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2899                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2900                config.sample_rate = outputDesc->mSamplingRate;
2901                config.channel_mask = outputDesc->mChannelMask;
2902                config.format = outputDesc->mFormat;
2903                status_t status = mpClientInterface->openOutput(moduleHandle,
2904                                                                &mPrimaryOutput,
2905                                                                &config,
2906                                                                &outputDesc->mDevice,
2907                                                                String8(""),
2908                                                                &outputDesc->mLatency,
2909                                                                outputDesc->mFlags);
2910                if (status != NO_ERROR) {
2911                    ALOGE("Failed to reopen hardware output stream, "
2912                        "samplingRate: %d, format %d, channels %d",
2913                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2914                } else {
2915                    outputDesc->mSamplingRate = config.sample_rate;
2916                    outputDesc->mChannelMask = config.channel_mask;
2917                    outputDesc->mFormat = config.format;
2918                    AudioParameter outputCmd = AudioParameter();
2919                    outputCmd.addInt(String8("set_id"), 0);
2920                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2921                    addOutput(mPrimaryOutput, outputDesc);
2922                }
2923            }
2924
2925
2926            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2927        }
2928    }
2929    return false;
2930}
2931
2932void AudioPolicyManager::exit()
2933{
2934    {
2935        AutoMutex _l(mLock);
2936        requestExit();
2937        mWaitWorkCV.signal();
2938    }
2939    requestExitAndWait();
2940}
2941
2942int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2943{
2944    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2945        if (output == mTestOutputs[i]) return i;
2946    }
2947    return 0;
2948}
2949#endif //AUDIO_POLICY_TEST
2950
2951// ---
2952
2953void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2954{
2955    outputDesc->mIoHandle = output;
2956    outputDesc->mId = nextUniqueId();
2957    mOutputs.add(output, outputDesc);
2958    nextAudioPortGeneration();
2959}
2960
2961void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2962{
2963    inputDesc->mIoHandle = input;
2964    inputDesc->mId = nextUniqueId();
2965    mInputs.add(input, inputDesc);
2966    nextAudioPortGeneration();
2967}
2968
2969void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
2970        const String8 address /*in*/,
2971        SortedVector<audio_io_handle_t>& outputs /*out*/) {
2972    // look for a match on the given address on the addresses of the outputs:
2973    // find the address by finding the patch that maps to this output
2974    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
2975    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
2976    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
2977    if (patchIdx >= 0) {
2978        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
2979        const int numSinks = patchDesc->mPatch.num_sinks;
2980        for (ssize_t j=0; j < numSinks; j++) {
2981            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
2982                const char* patchAddr =
2983                        patchDesc->mPatch.sinks[j].ext.device.address;
2984                if (strncmp(patchAddr,
2985                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
2986                    ALOGV("checkOutputsForDevice(): adding opened output %d on same address %s",
2987                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
2988                    outputs.add(desc->mIoHandle);
2989                    break;
2990                }
2991            }
2992        }
2993    }
2994}
2995
2996status_t AudioPolicyManager::checkOutputsForDevice(audio_devices_t device,
2997                                                       audio_policy_dev_state_t state,
2998                                                       SortedVector<audio_io_handle_t>& outputs,
2999                                                       const String8 address)
3000{
3001    sp<AudioOutputDescriptor> desc;
3002
3003    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3004        // first list already open outputs that can be routed to this device
3005        for (size_t i = 0; i < mOutputs.size(); i++) {
3006            desc = mOutputs.valueAt(i);
3007            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3008                if (!deviceDistinguishesOnAddress(device)) {
3009                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3010                    outputs.add(mOutputs.keyAt(i));
3011                } else {
3012                    ALOGV("  checking address match due to device 0x%x", device);
3013                    findIoHandlesByAddress(desc, address, outputs);
3014                }
3015            }
3016        }
3017        // then look for output profiles that can be routed to this device
3018        SortedVector< sp<IOProfile> > profiles;
3019        for (size_t i = 0; i < mHwModules.size(); i++)
3020        {
3021            if (mHwModules[i]->mHandle == 0) {
3022                continue;
3023            }
3024            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3025            {
3026                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3027                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3028                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3029                }
3030            }
3031        }
3032
3033        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3034
3035        if (profiles.isEmpty() && outputs.isEmpty()) {
3036            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3037            return BAD_VALUE;
3038        }
3039
3040        // open outputs for matching profiles if needed. Direct outputs are also opened to
3041        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3042        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3043            sp<IOProfile> profile = profiles[profile_index];
3044
3045            // nothing to do if one output is already opened for this profile
3046            size_t j;
3047            for (j = 0; j < outputs.size(); j++) {
3048                desc = mOutputs.valueFor(outputs.itemAt(j));
3049                if (!desc->isDuplicated() && desc->mProfile == profile) {
3050                    break;
3051                }
3052            }
3053            if (j != outputs.size()) {
3054                continue;
3055            }
3056
3057            ALOGV("opening output for device %08x with params %s profile %p",
3058                                                      device, address.string(), profile.get());
3059            desc = new AudioOutputDescriptor(profile);
3060            desc->mDevice = device;
3061            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3062            config.sample_rate = desc->mSamplingRate;
3063            config.channel_mask = desc->mChannelMask;
3064            config.format = desc->mFormat;
3065            config.offload_info.sample_rate = desc->mSamplingRate;
3066            config.offload_info.channel_mask = desc->mChannelMask;
3067            config.offload_info.format = desc->mFormat;
3068            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3069            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3070                                                            &output,
3071                                                            &config,
3072                                                            &desc->mDevice,
3073                                                            address,
3074                                                            &desc->mLatency,
3075                                                            desc->mFlags);
3076            if (status == NO_ERROR) {
3077                desc->mSamplingRate = config.sample_rate;
3078                desc->mChannelMask = config.channel_mask;
3079                desc->mFormat = config.format;
3080
3081                // Here is where the out_set_parameters() for card & device gets called
3082                if (!address.isEmpty()) {
3083                    char *param = audio_device_address_to_parameter(device, address);
3084                    mpClientInterface->setParameters(output, String8(param));
3085                    free(param);
3086                }
3087
3088                // Here is where we step through and resolve any "dynamic" fields
3089                String8 reply;
3090                char *value;
3091                if (profile->mSamplingRates[0] == 0) {
3092                    reply = mpClientInterface->getParameters(output,
3093                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3094                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3095                              reply.string());
3096                    value = strpbrk((char *)reply.string(), "=");
3097                    if (value != NULL) {
3098                        profile->loadSamplingRates(value + 1);
3099                    }
3100                }
3101                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3102                    reply = mpClientInterface->getParameters(output,
3103                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3104                    ALOGV("checkOutputsForDevice() supported formats %s",
3105                              reply.string());
3106                    value = strpbrk((char *)reply.string(), "=");
3107                    if (value != NULL) {
3108                        profile->loadFormats(value + 1);
3109                    }
3110                }
3111                if (profile->mChannelMasks[0] == 0) {
3112                    reply = mpClientInterface->getParameters(output,
3113                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3114                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3115                              reply.string());
3116                    value = strpbrk((char *)reply.string(), "=");
3117                    if (value != NULL) {
3118                        profile->loadOutChannels(value + 1);
3119                    }
3120                }
3121                if (((profile->mSamplingRates[0] == 0) &&
3122                         (profile->mSamplingRates.size() < 2)) ||
3123                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3124                         (profile->mFormats.size() < 2)) ||
3125                     ((profile->mChannelMasks[0] == 0) &&
3126                         (profile->mChannelMasks.size() < 2))) {
3127                    ALOGW("checkOutputsForDevice() missing param");
3128                    mpClientInterface->closeOutput(output);
3129                    output = AUDIO_IO_HANDLE_NONE;
3130                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3131                            profile->mChannelMasks[0] == 0) {
3132                    mpClientInterface->closeOutput(output);
3133                    config.sample_rate = profile->pickSamplingRate();
3134                    config.channel_mask = profile->pickChannelMask();
3135                    config.format = profile->pickFormat();
3136                    config.offload_info.sample_rate = config.sample_rate;
3137                    config.offload_info.channel_mask = config.channel_mask;
3138                    config.offload_info.format = config.format;
3139                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3140                                                           &output,
3141                                                           &config,
3142                                                           &desc->mDevice,
3143                                                           address,
3144                                                           &desc->mLatency,
3145                                                           desc->mFlags);
3146                    if (status == NO_ERROR) {
3147                        desc->mSamplingRate = config.sample_rate;
3148                        desc->mChannelMask = config.channel_mask;
3149                        desc->mFormat = config.format;
3150                    } else {
3151                        output = AUDIO_IO_HANDLE_NONE;
3152                    }
3153                }
3154
3155                if (output != AUDIO_IO_HANDLE_NONE) {
3156                    addOutput(output, desc);
3157                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3158                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3159
3160                        // set initial stream volume for device
3161                        applyStreamVolumes(output, device, 0, true);
3162
3163                        //TODO: configure audio effect output stage here
3164
3165                        // open a duplicating output thread for the new output and the primary output
3166                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3167                                                                                  mPrimaryOutput);
3168                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3169                            // add duplicated output descriptor
3170                            sp<AudioOutputDescriptor> dupOutputDesc =
3171                                    new AudioOutputDescriptor(NULL);
3172                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3173                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3174                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3175                            dupOutputDesc->mFormat = desc->mFormat;
3176                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3177                            dupOutputDesc->mLatency = desc->mLatency;
3178                            addOutput(duplicatedOutput, dupOutputDesc);
3179                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3180                        } else {
3181                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3182                                    mPrimaryOutput, output);
3183                            mpClientInterface->closeOutput(output);
3184                            mOutputs.removeItem(output);
3185                            nextAudioPortGeneration();
3186                            output = AUDIO_IO_HANDLE_NONE;
3187                        }
3188                    }
3189                }
3190            } else {
3191                output = AUDIO_IO_HANDLE_NONE;
3192            }
3193            if (output == AUDIO_IO_HANDLE_NONE) {
3194                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3195                profiles.removeAt(profile_index);
3196                profile_index--;
3197            } else {
3198                outputs.add(output);
3199                if (deviceDistinguishesOnAddress(device)) {
3200                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3201                            device, address.string());
3202                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3203                            NULL/*patch handle*/, address.string());
3204                }
3205                ALOGV("checkOutputsForDevice(): adding output %d", output);
3206            }
3207        }
3208
3209        if (profiles.isEmpty()) {
3210            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3211            return BAD_VALUE;
3212        }
3213    } else { // Disconnect
3214        // check if one opened output is not needed any more after disconnecting one device
3215        for (size_t i = 0; i < mOutputs.size(); i++) {
3216            desc = mOutputs.valueAt(i);
3217            if (!desc->isDuplicated()) {
3218                if  (!(desc->mProfile->mSupportedDevices.types()
3219                        & mAvailableOutputDevices.types())) {
3220                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3221                            mOutputs.keyAt(i));
3222                    outputs.add(mOutputs.keyAt(i));
3223                } else if (deviceDistinguishesOnAddress(device) &&
3224                        // exact match on device
3225                        (desc->mProfile->mSupportedDevices.types() == device)) {
3226                    findIoHandlesByAddress(desc, address, outputs);
3227                }
3228            }
3229        }
3230        // Clear any profiles associated with the disconnected device.
3231        for (size_t i = 0; i < mHwModules.size(); i++)
3232        {
3233            if (mHwModules[i]->mHandle == 0) {
3234                continue;
3235            }
3236            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3237            {
3238                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3239                if (profile->mSupportedDevices.types() & device) {
3240                    ALOGV("checkOutputsForDevice(): "
3241                            "clearing direct output profile %zu on module %zu", j, i);
3242                    if (profile->mSamplingRates[0] == 0) {
3243                        profile->mSamplingRates.clear();
3244                        profile->mSamplingRates.add(0);
3245                    }
3246                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3247                        profile->mFormats.clear();
3248                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3249                    }
3250                    if (profile->mChannelMasks[0] == 0) {
3251                        profile->mChannelMasks.clear();
3252                        profile->mChannelMasks.add(0);
3253                    }
3254                }
3255            }
3256        }
3257    }
3258    return NO_ERROR;
3259}
3260
3261status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3262                                                      audio_policy_dev_state_t state,
3263                                                      SortedVector<audio_io_handle_t>& inputs,
3264                                                      const String8 address)
3265{
3266    sp<AudioInputDescriptor> desc;
3267    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3268        // first list already open inputs that can be routed to this device
3269        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3270            desc = mInputs.valueAt(input_index);
3271            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3272                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3273               inputs.add(mInputs.keyAt(input_index));
3274            }
3275        }
3276
3277        // then look for input profiles that can be routed to this device
3278        SortedVector< sp<IOProfile> > profiles;
3279        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3280        {
3281            if (mHwModules[module_idx]->mHandle == 0) {
3282                continue;
3283            }
3284            for (size_t profile_index = 0;
3285                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3286                 profile_index++)
3287            {
3288                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3289                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3290                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3291                          profile_index, module_idx);
3292                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3293                }
3294            }
3295        }
3296
3297        if (profiles.isEmpty() && inputs.isEmpty()) {
3298            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3299            return BAD_VALUE;
3300        }
3301
3302        // open inputs for matching profiles if needed. Direct inputs are also opened to
3303        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3304        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3305
3306            sp<IOProfile> profile = profiles[profile_index];
3307            // nothing to do if one input is already opened for this profile
3308            size_t input_index;
3309            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3310                desc = mInputs.valueAt(input_index);
3311                if (desc->mProfile == profile) {
3312                    break;
3313                }
3314            }
3315            if (input_index != mInputs.size()) {
3316                continue;
3317            }
3318
3319            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3320            desc = new AudioInputDescriptor(profile);
3321            desc->mDevice = device;
3322            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3323            config.sample_rate = desc->mSamplingRate;
3324            config.channel_mask = desc->mChannelMask;
3325            config.format = desc->mFormat;
3326            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3327            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3328                                                           &input,
3329                                                           &config,
3330                                                           &desc->mDevice,
3331                                                           address,
3332                                                           AUDIO_SOURCE_MIC,
3333                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3334
3335            if (status == NO_ERROR) {
3336                desc->mSamplingRate = config.sample_rate;
3337                desc->mChannelMask = config.channel_mask;
3338                desc->mFormat = config.format;
3339
3340                if (!address.isEmpty()) {
3341                    char *param = audio_device_address_to_parameter(device, address);
3342                    mpClientInterface->setParameters(input, String8(param));
3343                    free(param);
3344                }
3345
3346                // Here is where we step through and resolve any "dynamic" fields
3347                String8 reply;
3348                char *value;
3349                if (profile->mSamplingRates[0] == 0) {
3350                    reply = mpClientInterface->getParameters(input,
3351                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3352                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3353                              reply.string());
3354                    value = strpbrk((char *)reply.string(), "=");
3355                    if (value != NULL) {
3356                        profile->loadSamplingRates(value + 1);
3357                    }
3358                }
3359                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3360                    reply = mpClientInterface->getParameters(input,
3361                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3362                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3363                    value = strpbrk((char *)reply.string(), "=");
3364                    if (value != NULL) {
3365                        profile->loadFormats(value + 1);
3366                    }
3367                }
3368                if (profile->mChannelMasks[0] == 0) {
3369                    reply = mpClientInterface->getParameters(input,
3370                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3371                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3372                              reply.string());
3373                    value = strpbrk((char *)reply.string(), "=");
3374                    if (value != NULL) {
3375                        profile->loadInChannels(value + 1);
3376                    }
3377                }
3378                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3379                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3380                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3381                    ALOGW("checkInputsForDevice() direct input missing param");
3382                    mpClientInterface->closeInput(input);
3383                    input = AUDIO_IO_HANDLE_NONE;
3384                }
3385
3386                if (input != 0) {
3387                    addInput(input, desc);
3388                }
3389            } // endif input != 0
3390
3391            if (input == AUDIO_IO_HANDLE_NONE) {
3392                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3393                profiles.removeAt(profile_index);
3394                profile_index--;
3395            } else {
3396                inputs.add(input);
3397                ALOGV("checkInputsForDevice(): adding input %d", input);
3398            }
3399        } // end scan profiles
3400
3401        if (profiles.isEmpty()) {
3402            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3403            return BAD_VALUE;
3404        }
3405    } else {
3406        // Disconnect
3407        // check if one opened input is not needed any more after disconnecting one device
3408        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3409            desc = mInputs.valueAt(input_index);
3410            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3411                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3412                      mInputs.keyAt(input_index));
3413                inputs.add(mInputs.keyAt(input_index));
3414            }
3415        }
3416        // Clear any profiles associated with the disconnected device.
3417        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3418            if (mHwModules[module_index]->mHandle == 0) {
3419                continue;
3420            }
3421            for (size_t profile_index = 0;
3422                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3423                 profile_index++) {
3424                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3425                if (profile->mSupportedDevices.types() & device) {
3426                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3427                          profile_index, module_index);
3428                    if (profile->mSamplingRates[0] == 0) {
3429                        profile->mSamplingRates.clear();
3430                        profile->mSamplingRates.add(0);
3431                    }
3432                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3433                        profile->mFormats.clear();
3434                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3435                    }
3436                    if (profile->mChannelMasks[0] == 0) {
3437                        profile->mChannelMasks.clear();
3438                        profile->mChannelMasks.add(0);
3439                    }
3440                }
3441            }
3442        }
3443    } // end disconnect
3444
3445    return NO_ERROR;
3446}
3447
3448
3449void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3450{
3451    ALOGV("closeOutput(%d)", output);
3452
3453    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3454    if (outputDesc == NULL) {
3455        ALOGW("closeOutput() unknown output %d", output);
3456        return;
3457    }
3458
3459    // look for duplicated outputs connected to the output being removed.
3460    for (size_t i = 0; i < mOutputs.size(); i++) {
3461        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3462        if (dupOutputDesc->isDuplicated() &&
3463                (dupOutputDesc->mOutput1 == outputDesc ||
3464                dupOutputDesc->mOutput2 == outputDesc)) {
3465            sp<AudioOutputDescriptor> outputDesc2;
3466            if (dupOutputDesc->mOutput1 == outputDesc) {
3467                outputDesc2 = dupOutputDesc->mOutput2;
3468            } else {
3469                outputDesc2 = dupOutputDesc->mOutput1;
3470            }
3471            // As all active tracks on duplicated output will be deleted,
3472            // and as they were also referenced on the other output, the reference
3473            // count for their stream type must be adjusted accordingly on
3474            // the other output.
3475            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3476                int refCount = dupOutputDesc->mRefCount[j];
3477                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3478            }
3479            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3480            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3481
3482            mpClientInterface->closeOutput(duplicatedOutput);
3483            mOutputs.removeItem(duplicatedOutput);
3484        }
3485    }
3486
3487    AudioParameter param;
3488    param.add(String8("closing"), String8("true"));
3489    mpClientInterface->setParameters(output, param.toString());
3490
3491    mpClientInterface->closeOutput(output);
3492    mOutputs.removeItem(output);
3493    mPreviousOutputs = mOutputs;
3494    nextAudioPortGeneration();
3495}
3496
3497SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3498                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3499{
3500    SortedVector<audio_io_handle_t> outputs;
3501
3502    ALOGVV("getOutputsForDevice() device %04x", device);
3503    for (size_t i = 0; i < openOutputs.size(); i++) {
3504        ALOGVV("output %d isDuplicated=%d device=%04x",
3505                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3506        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3507            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3508            outputs.add(openOutputs.keyAt(i));
3509        }
3510    }
3511    return outputs;
3512}
3513
3514bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3515                                   SortedVector<audio_io_handle_t>& outputs2)
3516{
3517    if (outputs1.size() != outputs2.size()) {
3518        return false;
3519    }
3520    for (size_t i = 0; i < outputs1.size(); i++) {
3521        if (outputs1[i] != outputs2[i]) {
3522            return false;
3523        }
3524    }
3525    return true;
3526}
3527
3528void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3529{
3530    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3531    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3532    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3533    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3534
3535    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3536        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3537              strategy, srcOutputs[0], dstOutputs[0]);
3538        // mute strategy while moving tracks from one output to another
3539        for (size_t i = 0; i < srcOutputs.size(); i++) {
3540            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3541            if (desc->isStrategyActive(strategy)) {
3542                setStrategyMute(strategy, true, srcOutputs[i]);
3543                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3544            }
3545        }
3546
3547        // Move effects associated to this strategy from previous output to new output
3548        if (strategy == STRATEGY_MEDIA) {
3549            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3550            SortedVector<audio_io_handle_t> moved;
3551            for (size_t i = 0; i < mEffects.size(); i++) {
3552                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3553                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3554                        effectDesc->mIo != fxOutput) {
3555                    if (moved.indexOf(effectDesc->mIo) < 0) {
3556                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3557                              mEffects.keyAt(i), fxOutput);
3558                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3559                                                       fxOutput);
3560                        moved.add(effectDesc->mIo);
3561                    }
3562                    effectDesc->mIo = fxOutput;
3563                }
3564            }
3565        }
3566        // Move tracks associated to this strategy from previous output to new output
3567        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3568            if (getStrategy((audio_stream_type_t)i) == strategy) {
3569                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3570            }
3571        }
3572    }
3573}
3574
3575void AudioPolicyManager::checkOutputForAllStrategies()
3576{
3577    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3578    checkOutputForStrategy(STRATEGY_PHONE);
3579    checkOutputForStrategy(STRATEGY_SONIFICATION);
3580    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3581    checkOutputForStrategy(STRATEGY_MEDIA);
3582    checkOutputForStrategy(STRATEGY_DTMF);
3583}
3584
3585audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3586{
3587    for (size_t i = 0; i < mOutputs.size(); i++) {
3588        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3589        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3590            return mOutputs.keyAt(i);
3591        }
3592    }
3593
3594    return 0;
3595}
3596
3597void AudioPolicyManager::checkA2dpSuspend()
3598{
3599    audio_io_handle_t a2dpOutput = getA2dpOutput();
3600    if (a2dpOutput == 0) {
3601        mA2dpSuspended = false;
3602        return;
3603    }
3604
3605    bool isScoConnected =
3606            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3607    // suspend A2DP output if:
3608    //      (NOT already suspended) &&
3609    //      ((SCO device is connected &&
3610    //       (forced usage for communication || for record is SCO))) ||
3611    //      (phone state is ringing || in call)
3612    //
3613    // restore A2DP output if:
3614    //      (Already suspended) &&
3615    //      ((SCO device is NOT connected ||
3616    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3617    //      (phone state is NOT ringing && NOT in call)
3618    //
3619    if (mA2dpSuspended) {
3620        if ((!isScoConnected ||
3621             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3622              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3623             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3624              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3625
3626            mpClientInterface->restoreOutput(a2dpOutput);
3627            mA2dpSuspended = false;
3628        }
3629    } else {
3630        if ((isScoConnected &&
3631             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3632              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3633             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3634              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3635
3636            mpClientInterface->suspendOutput(a2dpOutput);
3637            mA2dpSuspended = true;
3638        }
3639    }
3640}
3641
3642audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3643{
3644    audio_devices_t device = AUDIO_DEVICE_NONE;
3645
3646    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3647
3648    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3649    if (index >= 0) {
3650        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3651        if (patchDesc->mUid != mUidCached) {
3652            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3653                  outputDesc->device(), outputDesc->mPatchHandle);
3654            return outputDesc->device();
3655        }
3656    }
3657
3658    // check the following by order of priority to request a routing change if necessary:
3659    // 1: the strategy enforced audible is active on the output:
3660    //      use device for strategy enforced audible
3661    // 2: we are in call or the strategy phone is active on the output:
3662    //      use device for strategy phone
3663    // 3: the strategy sonification is active on the output:
3664    //      use device for strategy sonification
3665    // 4: the strategy "respectful" sonification is active on the output:
3666    //      use device for strategy "respectful" sonification
3667    // 5: the strategy media is active on the output:
3668    //      use device for strategy media
3669    // 6: the strategy DTMF is active on the output:
3670    //      use device for strategy DTMF
3671    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3672        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3673    } else if (isInCall() ||
3674                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3675        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3676    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3677        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3678    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3679        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3680    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3681        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3682    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3683        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3684    }
3685
3686    ALOGV("getNewOutputDevice() selected device %x", device);
3687    return device;
3688}
3689
3690audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3691{
3692    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3693
3694    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3695    if (index >= 0) {
3696        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3697        if (patchDesc->mUid != mUidCached) {
3698            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3699                  inputDesc->mDevice, inputDesc->mPatchHandle);
3700            return inputDesc->mDevice;
3701        }
3702    }
3703
3704    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3705
3706    ALOGV("getNewInputDevice() selected device %x", device);
3707    return device;
3708}
3709
3710uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3711    return (uint32_t)getStrategy(stream);
3712}
3713
3714audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3715    // By checking the range of stream before calling getStrategy, we avoid
3716    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3717    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3718    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3719        return AUDIO_DEVICE_NONE;
3720    }
3721    audio_devices_t devices;
3722    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3723    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3724    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3725    for (size_t i = 0; i < outputs.size(); i++) {
3726        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3727        if (outputDesc->isStrategyActive(strategy)) {
3728            devices = outputDesc->device();
3729            break;
3730        }
3731    }
3732    return devices;
3733}
3734
3735AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3736        audio_stream_type_t stream) {
3737    // stream to strategy mapping
3738    switch (stream) {
3739    case AUDIO_STREAM_VOICE_CALL:
3740    case AUDIO_STREAM_BLUETOOTH_SCO:
3741        return STRATEGY_PHONE;
3742    case AUDIO_STREAM_RING:
3743    case AUDIO_STREAM_ALARM:
3744        return STRATEGY_SONIFICATION;
3745    case AUDIO_STREAM_NOTIFICATION:
3746        return STRATEGY_SONIFICATION_RESPECTFUL;
3747    case AUDIO_STREAM_DTMF:
3748        return STRATEGY_DTMF;
3749    default:
3750        ALOGE("unknown stream type");
3751    case AUDIO_STREAM_SYSTEM:
3752        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3753        // while key clicks are played produces a poor result
3754    case AUDIO_STREAM_TTS:
3755    case AUDIO_STREAM_MUSIC:
3756        return STRATEGY_MEDIA;
3757    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3758        return STRATEGY_ENFORCED_AUDIBLE;
3759    }
3760}
3761
3762uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3763    // flags to strategy mapping
3764    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3765        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3766    }
3767
3768    // usage to strategy mapping
3769    switch (attr->usage) {
3770    case AUDIO_USAGE_MEDIA:
3771    case AUDIO_USAGE_GAME:
3772    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3773    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3774    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3775        return (uint32_t) STRATEGY_MEDIA;
3776
3777    case AUDIO_USAGE_VOICE_COMMUNICATION:
3778        return (uint32_t) STRATEGY_PHONE;
3779
3780    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3781        return (uint32_t) STRATEGY_DTMF;
3782
3783    case AUDIO_USAGE_ALARM:
3784    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3785        return (uint32_t) STRATEGY_SONIFICATION;
3786
3787    case AUDIO_USAGE_NOTIFICATION:
3788    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3789    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3790    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3791    case AUDIO_USAGE_NOTIFICATION_EVENT:
3792        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3793
3794    case AUDIO_USAGE_UNKNOWN:
3795    default:
3796        return (uint32_t) STRATEGY_MEDIA;
3797    }
3798}
3799
3800void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3801    switch(stream) {
3802    case AUDIO_STREAM_MUSIC:
3803        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3804        updateDevicesAndOutputs();
3805        break;
3806    default:
3807        break;
3808    }
3809}
3810
3811audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3812                                                             bool fromCache)
3813{
3814    uint32_t device = AUDIO_DEVICE_NONE;
3815
3816    if (fromCache) {
3817        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3818              strategy, mDeviceForStrategy[strategy]);
3819        return mDeviceForStrategy[strategy];
3820    }
3821    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3822    switch (strategy) {
3823
3824    case STRATEGY_SONIFICATION_RESPECTFUL:
3825        if (isInCall()) {
3826            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3827        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3828                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3829            // while media is playing on a remote device, use the the sonification behavior.
3830            // Note that we test this usecase before testing if media is playing because
3831            //   the isStreamActive() method only informs about the activity of a stream, not
3832            //   if it's for local playback. Note also that we use the same delay between both tests
3833            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3834        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3835            // while media is playing (or has recently played), use the same device
3836            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3837        } else {
3838            // when media is not playing anymore, fall back on the sonification behavior
3839            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3840        }
3841
3842        break;
3843
3844    case STRATEGY_DTMF:
3845        if (!isInCall()) {
3846            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3847            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3848            break;
3849        }
3850        // when in call, DTMF and PHONE strategies follow the same rules
3851        // FALL THROUGH
3852
3853    case STRATEGY_PHONE:
3854        // Force use of only devices on primary output if:
3855        // - in call AND
3856        //   - cannot route from voice call RX OR
3857        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
3858        if (mPhoneState == AUDIO_MODE_IN_CALL) {
3859            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
3860            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
3861            if (((mAvailableInputDevices.types() &
3862                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
3863                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
3864                         (hwOutputDesc->mAudioPort->mModule->mHalVersion <
3865                             AUDIO_DEVICE_API_VERSION_3_0))) {
3866                availableOutputDeviceTypes = availablePrimaryOutputDevices();
3867            }
3868        }
3869        // for phone strategy, we first consider the forced use and then the available devices by order
3870        // of priority
3871        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3872        case AUDIO_POLICY_FORCE_BT_SCO:
3873            if (!isInCall() || strategy != STRATEGY_DTMF) {
3874                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3875                if (device) break;
3876            }
3877            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3878            if (device) break;
3879            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3880            if (device) break;
3881            // if SCO device is requested but no SCO device is available, fall back to default case
3882            // FALL THROUGH
3883
3884        default:    // FORCE_NONE
3885            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3886            if (!isInCall() &&
3887                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3888                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3889                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3890                if (device) break;
3891                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3892                if (device) break;
3893            }
3894            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3895            if (device) break;
3896            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3897            if (device) break;
3898            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3899            if (device) break;
3900            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3901                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3902                if (device) break;
3903                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3904                if (device) break;
3905                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3906                if (device) break;
3907                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3908                if (device) break;
3909            }
3910            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3911            if (device) break;
3912            device = mDefaultOutputDevice->mDeviceType;
3913            if (device == AUDIO_DEVICE_NONE) {
3914                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3915            }
3916            break;
3917
3918        case AUDIO_POLICY_FORCE_SPEAKER:
3919            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3920            // A2DP speaker when forcing to speaker output
3921            if (!isInCall() &&
3922                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3923                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3924                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3925                if (device) break;
3926            }
3927            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3928                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3929                if (device) break;
3930                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3931                if (device) break;
3932                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3933                if (device) break;
3934                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3935                if (device) break;
3936                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3937                if (device) break;
3938            }
3939            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
3940            if (device) break;
3941            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3942            if (device) break;
3943            device = mDefaultOutputDevice->mDeviceType;
3944            if (device == AUDIO_DEVICE_NONE) {
3945                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
3946            }
3947            break;
3948        }
3949    break;
3950
3951    case STRATEGY_SONIFICATION:
3952
3953        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
3954        // handleIncallSonification().
3955        if (isInCall()) {
3956            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
3957            break;
3958        }
3959        // FALL THROUGH
3960
3961    case STRATEGY_ENFORCED_AUDIBLE:
3962        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
3963        // except:
3964        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
3965        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
3966
3967        if ((strategy == STRATEGY_SONIFICATION) ||
3968                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
3969            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3970            if (device == AUDIO_DEVICE_NONE) {
3971                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
3972            }
3973        }
3974        // The second device used for sonification is the same as the device used by media strategy
3975        // FALL THROUGH
3976
3977    case STRATEGY_MEDIA: {
3978        uint32_t device2 = AUDIO_DEVICE_NONE;
3979        if (strategy != STRATEGY_SONIFICATION) {
3980            // no sonification on remote submix (e.g. WFD)
3981            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
3982        }
3983        if ((device2 == AUDIO_DEVICE_NONE) &&
3984                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3985                (getA2dpOutput() != 0) && !mA2dpSuspended) {
3986            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3987            if (device2 == AUDIO_DEVICE_NONE) {
3988                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3989            }
3990            if (device2 == AUDIO_DEVICE_NONE) {
3991                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3992            }
3993        }
3994        if (device2 == AUDIO_DEVICE_NONE) {
3995            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3996        }
3997        if ((device2 == AUDIO_DEVICE_NONE)) {
3998            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
3999        }
4000        if (device2 == AUDIO_DEVICE_NONE) {
4001            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4002        }
4003        if (device2 == AUDIO_DEVICE_NONE) {
4004            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4005        }
4006        if (device2 == AUDIO_DEVICE_NONE) {
4007            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4008        }
4009        if (device2 == AUDIO_DEVICE_NONE) {
4010            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4011        }
4012        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4013            // no sonification on aux digital (e.g. HDMI)
4014            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4015        }
4016        if ((device2 == AUDIO_DEVICE_NONE) &&
4017                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4018            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4019        }
4020        if (device2 == AUDIO_DEVICE_NONE) {
4021            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4022        }
4023        int device3 = AUDIO_DEVICE_NONE;
4024        if (strategy == STRATEGY_MEDIA) {
4025            // ARC, SPDIF and AUX_LINE can co-exist with others.
4026            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4027            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4028            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4029        }
4030
4031        device2 |= device3;
4032        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4033        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4034        device |= device2;
4035
4036        // If hdmi system audio mode is on, remove speaker out of output list.
4037        if ((strategy == STRATEGY_MEDIA) &&
4038            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4039                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4040            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4041        }
4042
4043        if (device) break;
4044        device = mDefaultOutputDevice->mDeviceType;
4045        if (device == AUDIO_DEVICE_NONE) {
4046            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4047        }
4048        } break;
4049
4050    default:
4051        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4052        break;
4053    }
4054
4055    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4056    return device;
4057}
4058
4059void AudioPolicyManager::updateDevicesAndOutputs()
4060{
4061    for (int i = 0; i < NUM_STRATEGIES; i++) {
4062        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4063    }
4064    mPreviousOutputs = mOutputs;
4065}
4066
4067uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4068                                                       audio_devices_t prevDevice,
4069                                                       uint32_t delayMs)
4070{
4071    // mute/unmute strategies using an incompatible device combination
4072    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4073    // if unmuting, unmute only after the specified delay
4074    if (outputDesc->isDuplicated()) {
4075        return 0;
4076    }
4077
4078    uint32_t muteWaitMs = 0;
4079    audio_devices_t device = outputDesc->device();
4080    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4081
4082    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4083        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4084        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4085        bool doMute = false;
4086
4087        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4088            doMute = true;
4089            outputDesc->mStrategyMutedByDevice[i] = true;
4090        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4091            doMute = true;
4092            outputDesc->mStrategyMutedByDevice[i] = false;
4093        }
4094        if (doMute) {
4095            for (size_t j = 0; j < mOutputs.size(); j++) {
4096                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4097                // skip output if it does not share any device with current output
4098                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4099                        == AUDIO_DEVICE_NONE) {
4100                    continue;
4101                }
4102                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4103                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4104                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4105                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4106                if (desc->isStrategyActive((routing_strategy)i)) {
4107                    if (mute) {
4108                        // FIXME: should not need to double latency if volume could be applied
4109                        // immediately by the audioflinger mixer. We must account for the delay
4110                        // between now and the next time the audioflinger thread for this output
4111                        // will process a buffer (which corresponds to one buffer size,
4112                        // usually 1/2 or 1/4 of the latency).
4113                        if (muteWaitMs < desc->latency() * 2) {
4114                            muteWaitMs = desc->latency() * 2;
4115                        }
4116                    }
4117                }
4118            }
4119        }
4120    }
4121
4122    // temporary mute output if device selection changes to avoid volume bursts due to
4123    // different per device volumes
4124    if (outputDesc->isActive() && (device != prevDevice)) {
4125        if (muteWaitMs < outputDesc->latency() * 2) {
4126            muteWaitMs = outputDesc->latency() * 2;
4127        }
4128        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4129            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4130                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4131                // do tempMute unmute after twice the mute wait time
4132                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4133                                muteWaitMs *2, device);
4134            }
4135        }
4136    }
4137
4138    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4139    if (muteWaitMs > delayMs) {
4140        muteWaitMs -= delayMs;
4141        usleep(muteWaitMs * 1000);
4142        return muteWaitMs;
4143    }
4144    return 0;
4145}
4146
4147uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4148                                             audio_devices_t device,
4149                                             bool force,
4150                                             int delayMs,
4151                                             audio_patch_handle_t *patchHandle,
4152                                             const char* address)
4153{
4154    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4155    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4156    AudioParameter param;
4157    uint32_t muteWaitMs;
4158
4159    if (outputDesc->isDuplicated()) {
4160        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4161        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4162        return muteWaitMs;
4163    }
4164    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4165    // output profile
4166    if ((device != AUDIO_DEVICE_NONE) &&
4167            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4168        return 0;
4169    }
4170
4171    // filter devices according to output selected
4172    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4173
4174    audio_devices_t prevDevice = outputDesc->mDevice;
4175
4176    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4177
4178    if (device != AUDIO_DEVICE_NONE) {
4179        outputDesc->mDevice = device;
4180    }
4181    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4182
4183    // Do not change the routing if:
4184    //  - the requested device is AUDIO_DEVICE_NONE
4185    //  - the requested device is the same as current device and force is not specified.
4186    // Doing this check here allows the caller to call setOutputDevice() without conditions
4187    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
4188        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
4189        return muteWaitMs;
4190    }
4191
4192    ALOGV("setOutputDevice() changing device");
4193
4194    // do the routing
4195    if (device == AUDIO_DEVICE_NONE) {
4196        resetOutputDevice(output, delayMs, NULL);
4197    } else {
4198        DeviceVector deviceList = (address == NULL) ?
4199                mAvailableOutputDevices.getDevicesFromType(device)
4200                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4201        if (!deviceList.isEmpty()) {
4202            struct audio_patch patch;
4203            outputDesc->toAudioPortConfig(&patch.sources[0]);
4204            patch.num_sources = 1;
4205            patch.num_sinks = 0;
4206            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4207                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4208                patch.num_sinks++;
4209            }
4210            ssize_t index;
4211            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4212                index = mAudioPatches.indexOfKey(*patchHandle);
4213            } else {
4214                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4215            }
4216            sp< AudioPatch> patchDesc;
4217            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4218            if (index >= 0) {
4219                patchDesc = mAudioPatches.valueAt(index);
4220                afPatchHandle = patchDesc->mAfPatchHandle;
4221            }
4222
4223            status_t status = mpClientInterface->createAudioPatch(&patch,
4224                                                                   &afPatchHandle,
4225                                                                   delayMs);
4226            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4227                    "num_sources %d num_sinks %d",
4228                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4229            if (status == NO_ERROR) {
4230                if (index < 0) {
4231                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4232                                               &patch, mUidCached);
4233                    addAudioPatch(patchDesc->mHandle, patchDesc);
4234                } else {
4235                    patchDesc->mPatch = patch;
4236                }
4237                patchDesc->mAfPatchHandle = afPatchHandle;
4238                patchDesc->mUid = mUidCached;
4239                if (patchHandle) {
4240                    *patchHandle = patchDesc->mHandle;
4241                }
4242                outputDesc->mPatchHandle = patchDesc->mHandle;
4243                nextAudioPortGeneration();
4244                mpClientInterface->onAudioPatchListUpdate();
4245            }
4246        }
4247    }
4248
4249    // update stream volumes according to new device
4250    applyStreamVolumes(output, device, delayMs);
4251
4252    return muteWaitMs;
4253}
4254
4255status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4256                                               int delayMs,
4257                                               audio_patch_handle_t *patchHandle)
4258{
4259    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4260    ssize_t index;
4261    if (patchHandle) {
4262        index = mAudioPatches.indexOfKey(*patchHandle);
4263    } else {
4264        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4265    }
4266    if (index < 0) {
4267        return INVALID_OPERATION;
4268    }
4269    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4270    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4271    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4272    outputDesc->mPatchHandle = 0;
4273    removeAudioPatch(patchDesc->mHandle);
4274    nextAudioPortGeneration();
4275    mpClientInterface->onAudioPatchListUpdate();
4276    return status;
4277}
4278
4279status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4280                                            audio_devices_t device,
4281                                            bool force,
4282                                            audio_patch_handle_t *patchHandle)
4283{
4284    status_t status = NO_ERROR;
4285
4286    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4287    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4288        inputDesc->mDevice = device;
4289
4290        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4291        if (!deviceList.isEmpty()) {
4292            struct audio_patch patch;
4293            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4294            // AUDIO_SOURCE_HOTWORD is for internal use only:
4295            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4296            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4297                    !inputDesc->mIsSoundTrigger) {
4298                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4299            }
4300            patch.num_sinks = 1;
4301            //only one input device for now
4302            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4303            patch.num_sources = 1;
4304            ssize_t index;
4305            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4306                index = mAudioPatches.indexOfKey(*patchHandle);
4307            } else {
4308                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4309            }
4310            sp< AudioPatch> patchDesc;
4311            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4312            if (index >= 0) {
4313                patchDesc = mAudioPatches.valueAt(index);
4314                afPatchHandle = patchDesc->mAfPatchHandle;
4315            }
4316
4317            status_t status = mpClientInterface->createAudioPatch(&patch,
4318                                                                  &afPatchHandle,
4319                                                                  0);
4320            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4321                                                                          status, afPatchHandle);
4322            if (status == NO_ERROR) {
4323                if (index < 0) {
4324                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4325                                               &patch, mUidCached);
4326                    addAudioPatch(patchDesc->mHandle, patchDesc);
4327                } else {
4328                    patchDesc->mPatch = patch;
4329                }
4330                patchDesc->mAfPatchHandle = afPatchHandle;
4331                patchDesc->mUid = mUidCached;
4332                if (patchHandle) {
4333                    *patchHandle = patchDesc->mHandle;
4334                }
4335                inputDesc->mPatchHandle = patchDesc->mHandle;
4336                nextAudioPortGeneration();
4337                mpClientInterface->onAudioPatchListUpdate();
4338            }
4339        }
4340    }
4341    return status;
4342}
4343
4344status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4345                                              audio_patch_handle_t *patchHandle)
4346{
4347    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4348    ssize_t index;
4349    if (patchHandle) {
4350        index = mAudioPatches.indexOfKey(*patchHandle);
4351    } else {
4352        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4353    }
4354    if (index < 0) {
4355        return INVALID_OPERATION;
4356    }
4357    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4358    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4359    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4360    inputDesc->mPatchHandle = 0;
4361    removeAudioPatch(patchDesc->mHandle);
4362    nextAudioPortGeneration();
4363    mpClientInterface->onAudioPatchListUpdate();
4364    return status;
4365}
4366
4367sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4368                                                   uint32_t& samplingRate,
4369                                                   audio_format_t format,
4370                                                   audio_channel_mask_t channelMask,
4371                                                   audio_input_flags_t flags)
4372{
4373    // Choose an input profile based on the requested capture parameters: select the first available
4374    // profile supporting all requested parameters.
4375
4376    for (size_t i = 0; i < mHwModules.size(); i++)
4377    {
4378        if (mHwModules[i]->mHandle == 0) {
4379            continue;
4380        }
4381        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4382        {
4383            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4384            // profile->log();
4385            if (profile->isCompatibleProfile(device, samplingRate,
4386                                             &samplingRate /*updatedSamplingRate*/,
4387                                             format, channelMask, (audio_output_flags_t) flags)) {
4388                return profile;
4389            }
4390        }
4391    }
4392    return NULL;
4393}
4394
4395audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4396{
4397    uint32_t device = AUDIO_DEVICE_NONE;
4398    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4399                                            ~AUDIO_DEVICE_BIT_IN;
4400    switch (inputSource) {
4401    case AUDIO_SOURCE_VOICE_UPLINK:
4402      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4403          device = AUDIO_DEVICE_IN_VOICE_CALL;
4404          break;
4405      }
4406      break;
4407
4408    case AUDIO_SOURCE_DEFAULT:
4409    case AUDIO_SOURCE_MIC:
4410    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4411        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4412    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4413        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4414    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4415        device = AUDIO_DEVICE_IN_USB_DEVICE;
4416    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4417        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4418    }
4419    break;
4420
4421    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4422        // Allow only use of devices on primary input if in call and HAL does not support routing
4423        // to voice call path.
4424        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4425                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4426            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4427        }
4428
4429        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4430        case AUDIO_POLICY_FORCE_BT_SCO:
4431            // if SCO device is requested but no SCO device is available, fall back to default case
4432            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4433                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4434                break;
4435            }
4436            // FALL THROUGH
4437
4438        default:    // FORCE_NONE
4439            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4440                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4441            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4442                device = AUDIO_DEVICE_IN_USB_DEVICE;
4443            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4444                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4445            }
4446            break;
4447
4448        case AUDIO_POLICY_FORCE_SPEAKER:
4449            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4450                device = AUDIO_DEVICE_IN_BACK_MIC;
4451            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4452                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4453            }
4454            break;
4455        }
4456        break;
4457
4458    case AUDIO_SOURCE_VOICE_RECOGNITION:
4459    case AUDIO_SOURCE_HOTWORD:
4460        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4461                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4462            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4463        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4464            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4465        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4466            device = AUDIO_DEVICE_IN_USB_DEVICE;
4467        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4468            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4469        }
4470        break;
4471    case AUDIO_SOURCE_CAMCORDER:
4472        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4473            device = AUDIO_DEVICE_IN_BACK_MIC;
4474        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4475            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4476        }
4477        break;
4478    case AUDIO_SOURCE_VOICE_DOWNLINK:
4479    case AUDIO_SOURCE_VOICE_CALL:
4480        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4481            device = AUDIO_DEVICE_IN_VOICE_CALL;
4482        }
4483        break;
4484    case AUDIO_SOURCE_REMOTE_SUBMIX:
4485        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4486            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4487        }
4488        break;
4489    default:
4490        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4491        break;
4492    }
4493    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4494    return device;
4495}
4496
4497bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4498{
4499    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4500        device &= ~AUDIO_DEVICE_BIT_IN;
4501        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4502            return true;
4503    }
4504    return false;
4505}
4506
4507bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4508    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4509}
4510
4511audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4512{
4513    for (size_t i = 0; i < mInputs.size(); i++) {
4514        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4515        if ((input_descriptor->mRefCount > 0)
4516                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4517            return mInputs.keyAt(i);
4518        }
4519    }
4520    return 0;
4521}
4522
4523uint32_t AudioPolicyManager::activeInputsCount() const
4524{
4525    uint32_t count = 0;
4526    for (size_t i = 0; i < mInputs.size(); i++) {
4527        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4528        if (desc->mRefCount > 0) {
4529            return count++;
4530        }
4531    }
4532    return count;
4533}
4534
4535
4536audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4537{
4538    if (device == AUDIO_DEVICE_NONE) {
4539        // this happens when forcing a route update and no track is active on an output.
4540        // In this case the returned category is not important.
4541        device =  AUDIO_DEVICE_OUT_SPEAKER;
4542    } else if (popcount(device) > 1) {
4543        // Multiple device selection is either:
4544        //  - speaker + one other device: give priority to speaker in this case.
4545        //  - one A2DP device + another device: happens with duplicated output. In this case
4546        // retain the device on the A2DP output as the other must not correspond to an active
4547        // selection if not the speaker.
4548        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4549            device = AUDIO_DEVICE_OUT_SPEAKER;
4550        } else {
4551            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4552        }
4553    }
4554
4555    ALOGW_IF(popcount(device) != 1,
4556            "getDeviceForVolume() invalid device combination: %08x",
4557            device);
4558
4559    return device;
4560}
4561
4562AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4563{
4564    switch(getDeviceForVolume(device)) {
4565        case AUDIO_DEVICE_OUT_EARPIECE:
4566            return DEVICE_CATEGORY_EARPIECE;
4567        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4568        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4569        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4570        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4571        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4572        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4573            return DEVICE_CATEGORY_HEADSET;
4574        case AUDIO_DEVICE_OUT_LINE:
4575        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4576        /*USB?  Remote submix?*/
4577            return DEVICE_CATEGORY_EXT_MEDIA;
4578        case AUDIO_DEVICE_OUT_SPEAKER:
4579        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4580        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4581        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4582        case AUDIO_DEVICE_OUT_USB_DEVICE:
4583        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4584        default:
4585            return DEVICE_CATEGORY_SPEAKER;
4586    }
4587}
4588
4589float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4590        int indexInUi)
4591{
4592    device_category deviceCategory = getDeviceCategory(device);
4593    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4594
4595    // the volume index in the UI is relative to the min and max volume indices for this stream type
4596    int nbSteps = 1 + curve[VOLMAX].mIndex -
4597            curve[VOLMIN].mIndex;
4598    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4599            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4600
4601    // find what part of the curve this index volume belongs to, or if it's out of bounds
4602    int segment = 0;
4603    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4604        return 0.0f;
4605    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4606        segment = 0;
4607    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4608        segment = 1;
4609    } else if (volIdx <= curve[VOLMAX].mIndex) {
4610        segment = 2;
4611    } else {                                                               // out of bounds
4612        return 1.0f;
4613    }
4614
4615    // linear interpolation in the attenuation table in dB
4616    float decibels = curve[segment].mDBAttenuation +
4617            ((float)(volIdx - curve[segment].mIndex)) *
4618                ( (curve[segment+1].mDBAttenuation -
4619                        curve[segment].mDBAttenuation) /
4620                    ((float)(curve[segment+1].mIndex -
4621                            curve[segment].mIndex)) );
4622
4623    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4624
4625    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4626            curve[segment].mIndex, volIdx,
4627            curve[segment+1].mIndex,
4628            curve[segment].mDBAttenuation,
4629            decibels,
4630            curve[segment+1].mDBAttenuation,
4631            amplification);
4632
4633    return amplification;
4634}
4635
4636const AudioPolicyManager::VolumeCurvePoint
4637    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4638    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4639};
4640
4641const AudioPolicyManager::VolumeCurvePoint
4642    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4643    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4644};
4645
4646const AudioPolicyManager::VolumeCurvePoint
4647    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4648    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
4649};
4650
4651const AudioPolicyManager::VolumeCurvePoint
4652    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4653    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4654};
4655
4656const AudioPolicyManager::VolumeCurvePoint
4657    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4658    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4659};
4660
4661const AudioPolicyManager::VolumeCurvePoint
4662    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4663    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4664};
4665
4666const AudioPolicyManager::VolumeCurvePoint
4667    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4668    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4669};
4670
4671// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4672// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4673// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4674// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4675
4676const AudioPolicyManager::VolumeCurvePoint
4677    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4678    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4679};
4680
4681const AudioPolicyManager::VolumeCurvePoint
4682    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4683    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4684};
4685
4686const AudioPolicyManager::VolumeCurvePoint
4687    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4688    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4689};
4690
4691const AudioPolicyManager::VolumeCurvePoint
4692    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4693    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4694};
4695
4696const AudioPolicyManager::VolumeCurvePoint
4697    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4698    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4699};
4700
4701const AudioPolicyManager::VolumeCurvePoint
4702            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4703                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4704    { // AUDIO_STREAM_VOICE_CALL
4705        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4706        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4707        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4708        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4709    },
4710    { // AUDIO_STREAM_SYSTEM
4711        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4712        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4713        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4714        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4715    },
4716    { // AUDIO_STREAM_RING
4717        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4718        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4719        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4720        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4721    },
4722    { // AUDIO_STREAM_MUSIC
4723        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4724        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4725        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4726        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4727    },
4728    { // AUDIO_STREAM_ALARM
4729        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4730        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4731        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4732        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4733    },
4734    { // AUDIO_STREAM_NOTIFICATION
4735        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4736        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4737        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4738        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4739    },
4740    { // AUDIO_STREAM_BLUETOOTH_SCO
4741        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4742        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4743        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4744        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4745    },
4746    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4747        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4748        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4749        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4750        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4751    },
4752    {  // AUDIO_STREAM_DTMF
4753        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4754        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4755        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4756        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4757    },
4758    { // AUDIO_STREAM_TTS
4759        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4760        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4761        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4762        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4763    },
4764};
4765
4766void AudioPolicyManager::initializeVolumeCurves()
4767{
4768    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4769        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4770            mStreams[i].mVolumeCurve[j] =
4771                    sVolumeProfiles[i][j];
4772        }
4773    }
4774
4775    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4776    if (mSpeakerDrcEnabled) {
4777        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4778                sDefaultSystemVolumeCurveDrc;
4779        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4780                sSpeakerSonificationVolumeCurveDrc;
4781        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4782                sSpeakerSonificationVolumeCurveDrc;
4783        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4784                sSpeakerSonificationVolumeCurveDrc;
4785        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4786                sSpeakerMediaVolumeCurveDrc;
4787    }
4788}
4789
4790float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4791                                            int index,
4792                                            audio_io_handle_t output,
4793                                            audio_devices_t device)
4794{
4795    float volume = 1.0;
4796    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4797    StreamDescriptor &streamDesc = mStreams[stream];
4798
4799    if (device == AUDIO_DEVICE_NONE) {
4800        device = outputDesc->device();
4801    }
4802
4803    volume = volIndexToAmpl(device, streamDesc, index);
4804
4805    // if a headset is connected, apply the following rules to ring tones and notifications
4806    // to avoid sound level bursts in user's ears:
4807    // - always attenuate ring tones and notifications volume by 6dB
4808    // - if music is playing, always limit the volume to current music volume,
4809    // with a minimum threshold at -36dB so that notification is always perceived.
4810    const routing_strategy stream_strategy = getStrategy(stream);
4811    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4812            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4813            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4814            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4815        ((stream_strategy == STRATEGY_SONIFICATION)
4816                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4817                || (stream == AUDIO_STREAM_SYSTEM)
4818                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4819                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4820        streamDesc.mCanBeMuted) {
4821        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4822        // when the phone is ringing we must consider that music could have been paused just before
4823        // by the music application and behave as if music was active if the last music track was
4824        // just stopped
4825        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4826                mLimitRingtoneVolume) {
4827            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4828            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4829                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4830                               output,
4831                               musicDevice);
4832            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4833                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4834            if (volume > minVol) {
4835                volume = minVol;
4836                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4837            }
4838        }
4839    }
4840
4841    return volume;
4842}
4843
4844status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4845                                                   int index,
4846                                                   audio_io_handle_t output,
4847                                                   audio_devices_t device,
4848                                                   int delayMs,
4849                                                   bool force)
4850{
4851
4852    // do not change actual stream volume if the stream is muted
4853    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4854        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4855              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4856        return NO_ERROR;
4857    }
4858
4859    // do not change in call volume if bluetooth is connected and vice versa
4860    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4861            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4862        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4863                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4864        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4865             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4866        return INVALID_OPERATION;
4867    }
4868
4869    float volume = computeVolume(stream, index, output, device);
4870    // We actually change the volume if:
4871    // - the float value returned by computeVolume() changed
4872    // - the force flag is set
4873    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4874            force) {
4875        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4876        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4877        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4878        // enabled
4879        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4880            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4881        }
4882        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4883    }
4884
4885    if (stream == AUDIO_STREAM_VOICE_CALL ||
4886        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4887        float voiceVolume;
4888        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4889        if (stream == AUDIO_STREAM_VOICE_CALL) {
4890            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4891        } else {
4892            voiceVolume = 1.0;
4893        }
4894
4895        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4896            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4897            mLastVoiceVolume = voiceVolume;
4898        }
4899    }
4900
4901    return NO_ERROR;
4902}
4903
4904void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4905                                                audio_devices_t device,
4906                                                int delayMs,
4907                                                bool force)
4908{
4909    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4910
4911    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4912        checkAndSetVolume((audio_stream_type_t)stream,
4913                          mStreams[stream].getVolumeIndex(device),
4914                          output,
4915                          device,
4916                          delayMs,
4917                          force);
4918    }
4919}
4920
4921void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4922                                             bool on,
4923                                             audio_io_handle_t output,
4924                                             int delayMs,
4925                                             audio_devices_t device)
4926{
4927    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
4928    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4929        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4930            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
4931        }
4932    }
4933}
4934
4935void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4936                                           bool on,
4937                                           audio_io_handle_t output,
4938                                           int delayMs,
4939                                           audio_devices_t device)
4940{
4941    StreamDescriptor &streamDesc = mStreams[stream];
4942    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4943    if (device == AUDIO_DEVICE_NONE) {
4944        device = outputDesc->device();
4945    }
4946
4947    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
4948          stream, on, output, outputDesc->mMuteCount[stream], device);
4949
4950    if (on) {
4951        if (outputDesc->mMuteCount[stream] == 0) {
4952            if (streamDesc.mCanBeMuted &&
4953                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4954                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
4955                checkAndSetVolume(stream, 0, output, device, delayMs);
4956            }
4957        }
4958        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
4959        outputDesc->mMuteCount[stream]++;
4960    } else {
4961        if (outputDesc->mMuteCount[stream] == 0) {
4962            ALOGV("setStreamMute() unmuting non muted stream!");
4963            return;
4964        }
4965        if (--outputDesc->mMuteCount[stream] == 0) {
4966            checkAndSetVolume(stream,
4967                              streamDesc.getVolumeIndex(device),
4968                              output,
4969                              device,
4970                              delayMs);
4971        }
4972    }
4973}
4974
4975void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
4976                                                      bool starting, bool stateChange)
4977{
4978    // if the stream pertains to sonification strategy and we are in call we must
4979    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
4980    // in the device used for phone strategy and play the tone if the selected device does not
4981    // interfere with the device used for phone strategy
4982    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
4983    // many times as there are active tracks on the output
4984    const routing_strategy stream_strategy = getStrategy(stream);
4985    if ((stream_strategy == STRATEGY_SONIFICATION) ||
4986            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
4987        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
4988        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
4989                stream, starting, outputDesc->mDevice, stateChange);
4990        if (outputDesc->mRefCount[stream]) {
4991            int muteCount = 1;
4992            if (stateChange) {
4993                muteCount = outputDesc->mRefCount[stream];
4994            }
4995            if (audio_is_low_visibility(stream)) {
4996                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
4997                for (int i = 0; i < muteCount; i++) {
4998                    setStreamMute(stream, starting, mPrimaryOutput);
4999                }
5000            } else {
5001                ALOGV("handleIncallSonification() high visibility");
5002                if (outputDesc->device() &
5003                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5004                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5005                    for (int i = 0; i < muteCount; i++) {
5006                        setStreamMute(stream, starting, mPrimaryOutput);
5007                    }
5008                }
5009                if (starting) {
5010                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5011                                                 AUDIO_STREAM_VOICE_CALL);
5012                } else {
5013                    mpClientInterface->stopTone();
5014                }
5015            }
5016        }
5017    }
5018}
5019
5020bool AudioPolicyManager::isInCall()
5021{
5022    return isStateInCall(mPhoneState);
5023}
5024
5025bool AudioPolicyManager::isStateInCall(int state) {
5026    return ((state == AUDIO_MODE_IN_CALL) ||
5027            (state == AUDIO_MODE_IN_COMMUNICATION));
5028}
5029
5030uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5031{
5032    return MAX_EFFECTS_CPU_LOAD;
5033}
5034
5035uint32_t AudioPolicyManager::getMaxEffectsMemory()
5036{
5037    return MAX_EFFECTS_MEMORY;
5038}
5039
5040
5041// --- AudioOutputDescriptor class implementation
5042
5043AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5044        const sp<IOProfile>& profile)
5045    : mId(0), mIoHandle(0), mLatency(0),
5046    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5047    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5048{
5049    // clear usage count for all stream types
5050    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5051        mRefCount[i] = 0;
5052        mCurVolume[i] = -1.0;
5053        mMuteCount[i] = 0;
5054        mStopTime[i] = 0;
5055    }
5056    for (int i = 0; i < NUM_STRATEGIES; i++) {
5057        mStrategyMutedByDevice[i] = false;
5058    }
5059    if (profile != NULL) {
5060        mAudioPort = profile;
5061        mFlags = profile->mFlags;
5062        mSamplingRate = profile->pickSamplingRate();
5063        mFormat = profile->pickFormat();
5064        mChannelMask = profile->pickChannelMask();
5065        if (profile->mGains.size() > 0) {
5066            profile->mGains[0]->getDefaultConfig(&mGain);
5067        }
5068    }
5069}
5070
5071audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5072{
5073    if (isDuplicated()) {
5074        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5075    } else {
5076        return mDevice;
5077    }
5078}
5079
5080uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5081{
5082    if (isDuplicated()) {
5083        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5084    } else {
5085        return mLatency;
5086    }
5087}
5088
5089bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5090        const sp<AudioOutputDescriptor> outputDesc)
5091{
5092    if (isDuplicated()) {
5093        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5094    } else if (outputDesc->isDuplicated()){
5095        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5096    } else {
5097        return (mProfile->mModule == outputDesc->mProfile->mModule);
5098    }
5099}
5100
5101void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5102                                                                   int delta)
5103{
5104    // forward usage count change to attached outputs
5105    if (isDuplicated()) {
5106        mOutput1->changeRefCount(stream, delta);
5107        mOutput2->changeRefCount(stream, delta);
5108    }
5109    if ((delta + (int)mRefCount[stream]) < 0) {
5110        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5111              delta, stream, mRefCount[stream]);
5112        mRefCount[stream] = 0;
5113        return;
5114    }
5115    mRefCount[stream] += delta;
5116    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5117}
5118
5119audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5120{
5121    if (isDuplicated()) {
5122        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5123    } else {
5124        return mProfile->mSupportedDevices.types() ;
5125    }
5126}
5127
5128bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5129{
5130    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5131}
5132
5133bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5134                                                                       uint32_t inPastMs,
5135                                                                       nsecs_t sysTime) const
5136{
5137    if ((sysTime == 0) && (inPastMs != 0)) {
5138        sysTime = systemTime();
5139    }
5140    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5141        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5142                (NUM_STRATEGIES == strategy)) &&
5143                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5144            return true;
5145        }
5146    }
5147    return false;
5148}
5149
5150bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5151                                                                       uint32_t inPastMs,
5152                                                                       nsecs_t sysTime) const
5153{
5154    if (mRefCount[stream] != 0) {
5155        return true;
5156    }
5157    if (inPastMs == 0) {
5158        return false;
5159    }
5160    if (sysTime == 0) {
5161        sysTime = systemTime();
5162    }
5163    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5164        return true;
5165    }
5166    return false;
5167}
5168
5169void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5170                                                 struct audio_port_config *dstConfig,
5171                                                 const struct audio_port_config *srcConfig) const
5172{
5173    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5174
5175    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5176                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5177    if (srcConfig != NULL) {
5178        dstConfig->config_mask |= srcConfig->config_mask;
5179    }
5180    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5181
5182    dstConfig->id = mId;
5183    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5184    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5185    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5186    dstConfig->ext.mix.handle = mIoHandle;
5187    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5188}
5189
5190void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5191                                                    struct audio_port *port) const
5192{
5193    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5194    mProfile->toAudioPort(port);
5195    port->id = mId;
5196    toAudioPortConfig(&port->active_config);
5197    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5198    port->ext.mix.handle = mIoHandle;
5199    port->ext.mix.latency_class =
5200            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5201}
5202
5203status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5204{
5205    const size_t SIZE = 256;
5206    char buffer[SIZE];
5207    String8 result;
5208
5209    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5210    result.append(buffer);
5211    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5212    result.append(buffer);
5213    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5214    result.append(buffer);
5215    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5216    result.append(buffer);
5217    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5218    result.append(buffer);
5219    snprintf(buffer, SIZE, " Devices %08x\n", device());
5220    result.append(buffer);
5221    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5222    result.append(buffer);
5223    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5224        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5225                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5226        result.append(buffer);
5227    }
5228    write(fd, result.string(), result.size());
5229
5230    return NO_ERROR;
5231}
5232
5233// --- AudioInputDescriptor class implementation
5234
5235AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5236    : mId(0), mIoHandle(0),
5237      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5238      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5239{
5240    if (profile != NULL) {
5241        mAudioPort = profile;
5242        mSamplingRate = profile->pickSamplingRate();
5243        mFormat = profile->pickFormat();
5244        mChannelMask = profile->pickChannelMask();
5245        if (profile->mGains.size() > 0) {
5246            profile->mGains[0]->getDefaultConfig(&mGain);
5247        }
5248    }
5249}
5250
5251void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5252                                                   struct audio_port_config *dstConfig,
5253                                                   const struct audio_port_config *srcConfig) const
5254{
5255    ALOG_ASSERT(mProfile != 0,
5256                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5257    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5258                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5259    if (srcConfig != NULL) {
5260        dstConfig->config_mask |= srcConfig->config_mask;
5261    }
5262
5263    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5264
5265    dstConfig->id = mId;
5266    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5267    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5268    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5269    dstConfig->ext.mix.handle = mIoHandle;
5270    dstConfig->ext.mix.usecase.source = mInputSource;
5271}
5272
5273void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5274                                                    struct audio_port *port) const
5275{
5276    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5277
5278    mProfile->toAudioPort(port);
5279    port->id = mId;
5280    toAudioPortConfig(&port->active_config);
5281    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5282    port->ext.mix.handle = mIoHandle;
5283    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5284}
5285
5286status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5287{
5288    const size_t SIZE = 256;
5289    char buffer[SIZE];
5290    String8 result;
5291
5292    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5293    result.append(buffer);
5294    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5295    result.append(buffer);
5296    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5297    result.append(buffer);
5298    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5299    result.append(buffer);
5300    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5301    result.append(buffer);
5302    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5303    result.append(buffer);
5304
5305    write(fd, result.string(), result.size());
5306
5307    return NO_ERROR;
5308}
5309
5310// --- StreamDescriptor class implementation
5311
5312AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5313    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5314{
5315    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5316}
5317
5318int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5319{
5320    device = AudioPolicyManager::getDeviceForVolume(device);
5321    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5322    if (mIndexCur.indexOfKey(device) < 0) {
5323        device = AUDIO_DEVICE_OUT_DEFAULT;
5324    }
5325    return mIndexCur.valueFor(device);
5326}
5327
5328void AudioPolicyManager::StreamDescriptor::dump(int fd)
5329{
5330    const size_t SIZE = 256;
5331    char buffer[SIZE];
5332    String8 result;
5333
5334    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5335             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5336    result.append(buffer);
5337    for (size_t i = 0; i < mIndexCur.size(); i++) {
5338        snprintf(buffer, SIZE, "%04x : %02d, ",
5339                 mIndexCur.keyAt(i),
5340                 mIndexCur.valueAt(i));
5341        result.append(buffer);
5342    }
5343    result.append("\n");
5344
5345    write(fd, result.string(), result.size());
5346}
5347
5348// --- EffectDescriptor class implementation
5349
5350status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5351{
5352    const size_t SIZE = 256;
5353    char buffer[SIZE];
5354    String8 result;
5355
5356    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5357    result.append(buffer);
5358    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5359    result.append(buffer);
5360    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5361    result.append(buffer);
5362    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5363    result.append(buffer);
5364    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5365    result.append(buffer);
5366    write(fd, result.string(), result.size());
5367
5368    return NO_ERROR;
5369}
5370
5371// --- HwModule class implementation
5372
5373AudioPolicyManager::HwModule::HwModule(const char *name)
5374    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5375      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5376{
5377}
5378
5379AudioPolicyManager::HwModule::~HwModule()
5380{
5381    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5382        mOutputProfiles[i]->mSupportedDevices.clear();
5383    }
5384    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5385        mInputProfiles[i]->mSupportedDevices.clear();
5386    }
5387    free((void *)mName);
5388}
5389
5390status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5391{
5392    cnode *node = root->first_child;
5393
5394    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5395
5396    while (node) {
5397        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5398            profile->loadSamplingRates((char *)node->value);
5399        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5400            profile->loadFormats((char *)node->value);
5401        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5402            profile->loadInChannels((char *)node->value);
5403        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5404            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5405                                                           mDeclaredDevices);
5406        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5407            profile->loadGains(node);
5408        }
5409        node = node->next;
5410    }
5411    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5412            "loadInput() invalid supported devices");
5413    ALOGW_IF(profile->mChannelMasks.size() == 0,
5414            "loadInput() invalid supported channel masks");
5415    ALOGW_IF(profile->mSamplingRates.size() == 0,
5416            "loadInput() invalid supported sampling rates");
5417    ALOGW_IF(profile->mFormats.size() == 0,
5418            "loadInput() invalid supported formats");
5419    if (!profile->mSupportedDevices.isEmpty() &&
5420            (profile->mChannelMasks.size() != 0) &&
5421            (profile->mSamplingRates.size() != 0) &&
5422            (profile->mFormats.size() != 0)) {
5423
5424        ALOGV("loadInput() adding input Supported Devices %04x",
5425              profile->mSupportedDevices.types());
5426
5427        mInputProfiles.add(profile);
5428        return NO_ERROR;
5429    } else {
5430        return BAD_VALUE;
5431    }
5432}
5433
5434status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5435{
5436    cnode *node = root->first_child;
5437
5438    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5439
5440    while (node) {
5441        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5442            profile->loadSamplingRates((char *)node->value);
5443        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5444            profile->loadFormats((char *)node->value);
5445        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5446            profile->loadOutChannels((char *)node->value);
5447        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5448            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5449                                                           mDeclaredDevices);
5450        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5451            profile->mFlags = parseFlagNames((char *)node->value);
5452        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5453            profile->loadGains(node);
5454        }
5455        node = node->next;
5456    }
5457    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5458            "loadOutput() invalid supported devices");
5459    ALOGW_IF(profile->mChannelMasks.size() == 0,
5460            "loadOutput() invalid supported channel masks");
5461    ALOGW_IF(profile->mSamplingRates.size() == 0,
5462            "loadOutput() invalid supported sampling rates");
5463    ALOGW_IF(profile->mFormats.size() == 0,
5464            "loadOutput() invalid supported formats");
5465    if (!profile->mSupportedDevices.isEmpty() &&
5466            (profile->mChannelMasks.size() != 0) &&
5467            (profile->mSamplingRates.size() != 0) &&
5468            (profile->mFormats.size() != 0)) {
5469
5470        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5471              profile->mSupportedDevices.types(), profile->mFlags);
5472
5473        mOutputProfiles.add(profile);
5474        return NO_ERROR;
5475    } else {
5476        return BAD_VALUE;
5477    }
5478}
5479
5480status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5481{
5482    cnode *node = root->first_child;
5483
5484    audio_devices_t type = AUDIO_DEVICE_NONE;
5485    while (node) {
5486        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5487            type = parseDeviceNames((char *)node->value);
5488            break;
5489        }
5490        node = node->next;
5491    }
5492    if (type == AUDIO_DEVICE_NONE ||
5493            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5494        ALOGW("loadDevice() bad type %08x", type);
5495        return BAD_VALUE;
5496    }
5497    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5498    deviceDesc->mModule = this;
5499
5500    node = root->first_child;
5501    while (node) {
5502        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5503            deviceDesc->mAddress = String8((char *)node->value);
5504        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5505            if (audio_is_input_device(type)) {
5506                deviceDesc->loadInChannels((char *)node->value);
5507            } else {
5508                deviceDesc->loadOutChannels((char *)node->value);
5509            }
5510        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5511            deviceDesc->loadGains(node);
5512        }
5513        node = node->next;
5514    }
5515
5516    ALOGV("loadDevice() adding device name %s type %08x address %s",
5517          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5518
5519    mDeclaredDevices.add(deviceDesc);
5520
5521    return NO_ERROR;
5522}
5523
5524void AudioPolicyManager::HwModule::dump(int fd)
5525{
5526    const size_t SIZE = 256;
5527    char buffer[SIZE];
5528    String8 result;
5529
5530    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5531    result.append(buffer);
5532    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5533    result.append(buffer);
5534    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5535    result.append(buffer);
5536    write(fd, result.string(), result.size());
5537    if (mOutputProfiles.size()) {
5538        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5539        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5540            snprintf(buffer, SIZE, "    output %zu:\n", i);
5541            write(fd, buffer, strlen(buffer));
5542            mOutputProfiles[i]->dump(fd);
5543        }
5544    }
5545    if (mInputProfiles.size()) {
5546        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5547        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5548            snprintf(buffer, SIZE, "    input %zu:\n", i);
5549            write(fd, buffer, strlen(buffer));
5550            mInputProfiles[i]->dump(fd);
5551        }
5552    }
5553    if (mDeclaredDevices.size()) {
5554        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5555        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5556            mDeclaredDevices[i]->dump(fd, 4, i);
5557        }
5558    }
5559}
5560
5561// --- AudioPort class implementation
5562
5563
5564AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5565          audio_port_role_t role, const sp<HwModule>& module) :
5566    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5567{
5568    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5569                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5570}
5571
5572void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5573{
5574    port->role = mRole;
5575    port->type = mType;
5576    unsigned int i;
5577    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5578        port->sample_rates[i] = mSamplingRates[i];
5579    }
5580    port->num_sample_rates = i;
5581    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5582        port->channel_masks[i] = mChannelMasks[i];
5583    }
5584    port->num_channel_masks = i;
5585    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5586        port->formats[i] = mFormats[i];
5587    }
5588    port->num_formats = i;
5589
5590    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5591
5592    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5593        port->gains[i] = mGains[i]->mGain;
5594    }
5595    port->num_gains = i;
5596}
5597
5598
5599void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5600{
5601    char *str = strtok(name, "|");
5602
5603    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5604    // rates should be read from the output stream after it is opened for the first time
5605    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5606        mSamplingRates.add(0);
5607        return;
5608    }
5609
5610    while (str != NULL) {
5611        uint32_t rate = atoi(str);
5612        if (rate != 0) {
5613            ALOGV("loadSamplingRates() adding rate %d", rate);
5614            mSamplingRates.add(rate);
5615        }
5616        str = strtok(NULL, "|");
5617    }
5618}
5619
5620void AudioPolicyManager::AudioPort::loadFormats(char *name)
5621{
5622    char *str = strtok(name, "|");
5623
5624    // by convention, "0' in the first entry in mFormats indicates the supported formats
5625    // should be read from the output stream after it is opened for the first time
5626    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5627        mFormats.add(AUDIO_FORMAT_DEFAULT);
5628        return;
5629    }
5630
5631    while (str != NULL) {
5632        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5633                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5634                                                             str);
5635        if (format != AUDIO_FORMAT_DEFAULT) {
5636            mFormats.add(format);
5637        }
5638        str = strtok(NULL, "|");
5639    }
5640}
5641
5642void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5643{
5644    const char *str = strtok(name, "|");
5645
5646    ALOGV("loadInChannels() %s", name);
5647
5648    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5649        mChannelMasks.add(0);
5650        return;
5651    }
5652
5653    while (str != NULL) {
5654        audio_channel_mask_t channelMask =
5655                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5656                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5657                                                   str);
5658        if (channelMask != 0) {
5659            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5660            mChannelMasks.add(channelMask);
5661        }
5662        str = strtok(NULL, "|");
5663    }
5664}
5665
5666void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5667{
5668    const char *str = strtok(name, "|");
5669
5670    ALOGV("loadOutChannels() %s", name);
5671
5672    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5673    // masks should be read from the output stream after it is opened for the first time
5674    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5675        mChannelMasks.add(0);
5676        return;
5677    }
5678
5679    while (str != NULL) {
5680        audio_channel_mask_t channelMask =
5681                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5682                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5683                                                   str);
5684        if (channelMask != 0) {
5685            mChannelMasks.add(channelMask);
5686        }
5687        str = strtok(NULL, "|");
5688    }
5689    return;
5690}
5691
5692audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5693{
5694    const char *str = strtok(name, "|");
5695
5696    ALOGV("loadGainMode() %s", name);
5697    audio_gain_mode_t mode = 0;
5698    while (str != NULL) {
5699        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5700                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5701                                                str);
5702        str = strtok(NULL, "|");
5703    }
5704    return mode;
5705}
5706
5707void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5708{
5709    cnode *node = root->first_child;
5710
5711    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5712
5713    while (node) {
5714        if (strcmp(node->name, GAIN_MODE) == 0) {
5715            gain->mGain.mode = loadGainMode((char *)node->value);
5716        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5717            if (mUseInChannelMask) {
5718                gain->mGain.channel_mask =
5719                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5720                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5721                                                           (char *)node->value);
5722            } else {
5723                gain->mGain.channel_mask =
5724                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5725                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5726                                                           (char *)node->value);
5727            }
5728        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5729            gain->mGain.min_value = atoi((char *)node->value);
5730        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5731            gain->mGain.max_value = atoi((char *)node->value);
5732        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5733            gain->mGain.default_value = atoi((char *)node->value);
5734        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5735            gain->mGain.step_value = atoi((char *)node->value);
5736        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5737            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5738        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5739            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5740        }
5741        node = node->next;
5742    }
5743
5744    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5745          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5746
5747    if (gain->mGain.mode == 0) {
5748        return;
5749    }
5750    mGains.add(gain);
5751}
5752
5753void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5754{
5755    cnode *node = root->first_child;
5756    int index = 0;
5757    while (node) {
5758        ALOGV("loadGains() loading gain %s", node->name);
5759        loadGain(node, index++);
5760        node = node->next;
5761    }
5762}
5763
5764status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5765{
5766    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5767        if (mSamplingRates[i] == samplingRate) {
5768            return NO_ERROR;
5769        }
5770    }
5771    return BAD_VALUE;
5772}
5773
5774status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5775        uint32_t *updatedSamplingRate) const
5776{
5777    // Search for the closest supported sampling rate that is above (preferred)
5778    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5779    // The sampling rates do not need to be sorted in ascending order.
5780    ssize_t maxBelow = -1;
5781    ssize_t minAbove = -1;
5782    uint32_t candidate;
5783    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5784        candidate = mSamplingRates[i];
5785        if (candidate == samplingRate) {
5786            if (updatedSamplingRate != NULL) {
5787                *updatedSamplingRate = candidate;
5788            }
5789            return NO_ERROR;
5790        }
5791        // candidate < desired
5792        if (candidate < samplingRate) {
5793            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5794                maxBelow = i;
5795            }
5796        // candidate > desired
5797        } else {
5798            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5799                minAbove = i;
5800            }
5801        }
5802    }
5803    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5804    // TODO Move these assumptions out.
5805    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5806    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5807                                                    // due to approximation by an int32_t of the
5808                                                    // phase increments
5809    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5810    if (minAbove >= 0) {
5811        candidate = mSamplingRates[minAbove];
5812        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5813            if (updatedSamplingRate != NULL) {
5814                *updatedSamplingRate = candidate;
5815            }
5816            return NO_ERROR;
5817        }
5818    }
5819    // But if we have to up-sample from a lower sampling rate, that's OK.
5820    if (maxBelow >= 0) {
5821        candidate = mSamplingRates[maxBelow];
5822        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5823            if (updatedSamplingRate != NULL) {
5824                *updatedSamplingRate = candidate;
5825            }
5826            return NO_ERROR;
5827        }
5828    }
5829    // leave updatedSamplingRate unmodified
5830    return BAD_VALUE;
5831}
5832
5833status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5834{
5835    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5836        if (mChannelMasks[i] == channelMask) {
5837            return NO_ERROR;
5838        }
5839    }
5840    return BAD_VALUE;
5841}
5842
5843status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5844        const
5845{
5846    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5847    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5848        // FIXME Does not handle multi-channel automatic conversions yet
5849        audio_channel_mask_t supported = mChannelMasks[i];
5850        if (supported == channelMask) {
5851            return NO_ERROR;
5852        }
5853        if (isRecordThread) {
5854            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5855            // FIXME Abstract this out to a table.
5856            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5857                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5858                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5859                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5860                return NO_ERROR;
5861            }
5862        }
5863    }
5864    return BAD_VALUE;
5865}
5866
5867status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
5868{
5869    for (size_t i = 0; i < mFormats.size(); i ++) {
5870        if (mFormats[i] == format) {
5871            return NO_ERROR;
5872        }
5873    }
5874    return BAD_VALUE;
5875}
5876
5877
5878uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
5879{
5880    // special case for uninitialized dynamic profile
5881    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
5882        return 0;
5883    }
5884
5885    uint32_t samplingRate = 0;
5886    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
5887
5888    // For mixed output and inputs, use max mixer sampling rates. Do not
5889    // limit sampling rate otherwise
5890    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5891            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5892            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5893        maxRate = UINT_MAX;
5894    }
5895    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5896        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
5897            samplingRate = mSamplingRates[i];
5898        }
5899    }
5900    return samplingRate;
5901}
5902
5903audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
5904{
5905    // special case for uninitialized dynamic profile
5906    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
5907        return AUDIO_CHANNEL_NONE;
5908    }
5909
5910    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
5911    uint32_t channelCount = 0;
5912    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
5913
5914    // For mixed output and inputs, use max mixer channel count. Do not
5915    // limit channel count otherwise
5916    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5917            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5918            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5919        maxCount = UINT_MAX;
5920    }
5921    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5922        uint32_t cnlCount;
5923        if (mUseInChannelMask) {
5924            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
5925        } else {
5926            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
5927        }
5928        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
5929            channelMask = mChannelMasks[i];
5930        }
5931    }
5932    return channelMask;
5933}
5934
5935/* format in order of increasing preference */
5936const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
5937        AUDIO_FORMAT_DEFAULT,
5938        AUDIO_FORMAT_PCM_16_BIT,
5939        AUDIO_FORMAT_PCM_8_24_BIT,
5940        AUDIO_FORMAT_PCM_24_BIT_PACKED,
5941        AUDIO_FORMAT_PCM_32_BIT,
5942        AUDIO_FORMAT_PCM_FLOAT,
5943};
5944
5945int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
5946                                                  audio_format_t format2)
5947{
5948    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
5949    // compressed format and better than any PCM format. This is by design of pickFormat()
5950    if (!audio_is_linear_pcm(format1)) {
5951        if (!audio_is_linear_pcm(format2)) {
5952            return 0;
5953        }
5954        return 1;
5955    }
5956    if (!audio_is_linear_pcm(format2)) {
5957        return -1;
5958    }
5959
5960    int index1 = -1, index2 = -1;
5961    for (size_t i = 0;
5962            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
5963            i ++) {
5964        if (sPcmFormatCompareTable[i] == format1) {
5965            index1 = i;
5966        }
5967        if (sPcmFormatCompareTable[i] == format2) {
5968            index2 = i;
5969        }
5970    }
5971    // format1 not found => index1 < 0 => format2 > format1
5972    // format2 not found => index2 < 0 => format2 < format1
5973    return index1 - index2;
5974}
5975
5976audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
5977{
5978    // special case for uninitialized dynamic profile
5979    if (mFormats.size() == 1 && mFormats[0] == 0) {
5980        return AUDIO_FORMAT_DEFAULT;
5981    }
5982
5983    audio_format_t format = AUDIO_FORMAT_DEFAULT;
5984    audio_format_t bestFormat =
5985            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
5986                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
5987    // For mixed output and inputs, use best mixer output format. Do not
5988    // limit format otherwise
5989    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5990            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5991             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
5992        bestFormat = AUDIO_FORMAT_INVALID;
5993    }
5994
5995    for (size_t i = 0; i < mFormats.size(); i ++) {
5996        if ((compareFormats(mFormats[i], format) > 0) &&
5997                (compareFormats(mFormats[i], bestFormat) <= 0)) {
5998            format = mFormats[i];
5999        }
6000    }
6001    return format;
6002}
6003
6004status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6005                                                  int index) const
6006{
6007    if (index < 0 || (size_t)index >= mGains.size()) {
6008        return BAD_VALUE;
6009    }
6010    return mGains[index]->checkConfig(gainConfig);
6011}
6012
6013void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6014{
6015    const size_t SIZE = 256;
6016    char buffer[SIZE];
6017    String8 result;
6018
6019    if (mName.size() != 0) {
6020        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6021        result.append(buffer);
6022    }
6023
6024    if (mSamplingRates.size() != 0) {
6025        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6026        result.append(buffer);
6027        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6028            if (i == 0 && mSamplingRates[i] == 0) {
6029                snprintf(buffer, SIZE, "Dynamic");
6030            } else {
6031                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6032            }
6033            result.append(buffer);
6034            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6035        }
6036        result.append("\n");
6037    }
6038
6039    if (mChannelMasks.size() != 0) {
6040        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6041        result.append(buffer);
6042        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6043            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6044
6045            if (i == 0 && mChannelMasks[i] == 0) {
6046                snprintf(buffer, SIZE, "Dynamic");
6047            } else {
6048                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6049            }
6050            result.append(buffer);
6051            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6052        }
6053        result.append("\n");
6054    }
6055
6056    if (mFormats.size() != 0) {
6057        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6058        result.append(buffer);
6059        for (size_t i = 0; i < mFormats.size(); i++) {
6060            const char *formatStr = enumToString(sFormatNameToEnumTable,
6061                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6062                                                 mFormats[i]);
6063            if (i == 0 && strcmp(formatStr, "") == 0) {
6064                snprintf(buffer, SIZE, "Dynamic");
6065            } else {
6066                snprintf(buffer, SIZE, "%s", formatStr);
6067            }
6068            result.append(buffer);
6069            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6070        }
6071        result.append("\n");
6072    }
6073    write(fd, result.string(), result.size());
6074    if (mGains.size() != 0) {
6075        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6076        write(fd, buffer, strlen(buffer) + 1);
6077        result.append(buffer);
6078        for (size_t i = 0; i < mGains.size(); i++) {
6079            mGains[i]->dump(fd, spaces + 2, i);
6080        }
6081    }
6082}
6083
6084// --- AudioGain class implementation
6085
6086AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6087{
6088    mIndex = index;
6089    mUseInChannelMask = useInChannelMask;
6090    memset(&mGain, 0, sizeof(struct audio_gain));
6091}
6092
6093void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6094{
6095    config->index = mIndex;
6096    config->mode = mGain.mode;
6097    config->channel_mask = mGain.channel_mask;
6098    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6099        config->values[0] = mGain.default_value;
6100    } else {
6101        uint32_t numValues;
6102        if (mUseInChannelMask) {
6103            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6104        } else {
6105            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6106        }
6107        for (size_t i = 0; i < numValues; i++) {
6108            config->values[i] = mGain.default_value;
6109        }
6110    }
6111    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6112        config->ramp_duration_ms = mGain.min_ramp_ms;
6113    }
6114}
6115
6116status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6117{
6118    if ((config->mode & ~mGain.mode) != 0) {
6119        return BAD_VALUE;
6120    }
6121    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6122        if ((config->values[0] < mGain.min_value) ||
6123                    (config->values[0] > mGain.max_value)) {
6124            return BAD_VALUE;
6125        }
6126    } else {
6127        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6128            return BAD_VALUE;
6129        }
6130        uint32_t numValues;
6131        if (mUseInChannelMask) {
6132            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6133        } else {
6134            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6135        }
6136        for (size_t i = 0; i < numValues; i++) {
6137            if ((config->values[i] < mGain.min_value) ||
6138                    (config->values[i] > mGain.max_value)) {
6139                return BAD_VALUE;
6140            }
6141        }
6142    }
6143    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6144        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6145                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6146            return BAD_VALUE;
6147        }
6148    }
6149    return NO_ERROR;
6150}
6151
6152void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6153{
6154    const size_t SIZE = 256;
6155    char buffer[SIZE];
6156    String8 result;
6157
6158    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6159    result.append(buffer);
6160    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6161    result.append(buffer);
6162    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6163    result.append(buffer);
6164    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6165    result.append(buffer);
6166    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6167    result.append(buffer);
6168    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6169    result.append(buffer);
6170    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6171    result.append(buffer);
6172    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6173    result.append(buffer);
6174    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6175    result.append(buffer);
6176
6177    write(fd, result.string(), result.size());
6178}
6179
6180// --- AudioPortConfig class implementation
6181
6182AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6183{
6184    mSamplingRate = 0;
6185    mChannelMask = AUDIO_CHANNEL_NONE;
6186    mFormat = AUDIO_FORMAT_INVALID;
6187    mGain.index = -1;
6188}
6189
6190status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6191                                                        const struct audio_port_config *config,
6192                                                        struct audio_port_config *backupConfig)
6193{
6194    struct audio_port_config localBackupConfig;
6195    status_t status = NO_ERROR;
6196
6197    localBackupConfig.config_mask = config->config_mask;
6198    toAudioPortConfig(&localBackupConfig);
6199
6200    if (mAudioPort == 0) {
6201        status = NO_INIT;
6202        goto exit;
6203    }
6204    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6205        status = mAudioPort->checkExactSamplingRate(config->sample_rate);
6206        if (status != NO_ERROR) {
6207            goto exit;
6208        }
6209        mSamplingRate = config->sample_rate;
6210    }
6211    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6212        status = mAudioPort->checkExactChannelMask(config->channel_mask);
6213        if (status != NO_ERROR) {
6214            goto exit;
6215        }
6216        mChannelMask = config->channel_mask;
6217    }
6218    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6219        status = mAudioPort->checkFormat(config->format);
6220        if (status != NO_ERROR) {
6221            goto exit;
6222        }
6223        mFormat = config->format;
6224    }
6225    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6226        status = mAudioPort->checkGain(&config->gain, config->gain.index);
6227        if (status != NO_ERROR) {
6228            goto exit;
6229        }
6230        mGain = config->gain;
6231    }
6232
6233exit:
6234    if (status != NO_ERROR) {
6235        applyAudioPortConfig(&localBackupConfig);
6236    }
6237    if (backupConfig != NULL) {
6238        *backupConfig = localBackupConfig;
6239    }
6240    return status;
6241}
6242
6243void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6244                                                    struct audio_port_config *dstConfig,
6245                                                    const struct audio_port_config *srcConfig) const
6246{
6247    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6248        dstConfig->sample_rate = mSamplingRate;
6249        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6250            dstConfig->sample_rate = srcConfig->sample_rate;
6251        }
6252    } else {
6253        dstConfig->sample_rate = 0;
6254    }
6255    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6256        dstConfig->channel_mask = mChannelMask;
6257        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6258            dstConfig->channel_mask = srcConfig->channel_mask;
6259        }
6260    } else {
6261        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6262    }
6263    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6264        dstConfig->format = mFormat;
6265        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6266            dstConfig->format = srcConfig->format;
6267        }
6268    } else {
6269        dstConfig->format = AUDIO_FORMAT_INVALID;
6270    }
6271    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6272        dstConfig->gain = mGain;
6273        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6274            dstConfig->gain = srcConfig->gain;
6275        }
6276    } else {
6277        dstConfig->gain.index = -1;
6278    }
6279    if (dstConfig->gain.index != -1) {
6280        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6281    } else {
6282        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6283    }
6284}
6285
6286// --- IOProfile class implementation
6287
6288AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6289                                         const sp<HwModule>& module)
6290    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6291{
6292}
6293
6294AudioPolicyManager::IOProfile::~IOProfile()
6295{
6296}
6297
6298// checks if the IO profile is compatible with specified parameters.
6299// Sampling rate, format and channel mask must be specified in order to
6300// get a valid a match
6301bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6302                                                            uint32_t samplingRate,
6303                                                            uint32_t *updatedSamplingRate,
6304                                                            audio_format_t format,
6305                                                            audio_channel_mask_t channelMask,
6306                                                            audio_output_flags_t flags) const
6307{
6308    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6309    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6310    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6311
6312    if ((mSupportedDevices.types() & device) != device) {
6313        return false;
6314    }
6315
6316    if (samplingRate == 0) {
6317         return false;
6318    }
6319    uint32_t myUpdatedSamplingRate = samplingRate;
6320    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6321         return false;
6322    }
6323    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6324            NO_ERROR) {
6325         return false;
6326    }
6327
6328    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6329        return false;
6330    }
6331
6332    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6333            checkExactChannelMask(channelMask) != NO_ERROR)) {
6334        return false;
6335    }
6336    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6337            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6338        return false;
6339    }
6340
6341    if (isPlaybackThread && (mFlags & flags) != flags) {
6342        return false;
6343    }
6344    // The only input flag that is allowed to be different is the fast flag.
6345    // An existing fast stream is compatible with a normal track request.
6346    // An existing normal stream is compatible with a fast track request,
6347    // but the fast request will be denied by AudioFlinger and converted to normal track.
6348    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
6349            ~AUDIO_INPUT_FLAG_FAST)) {
6350        return false;
6351    }
6352
6353    if (updatedSamplingRate != NULL) {
6354        *updatedSamplingRate = myUpdatedSamplingRate;
6355    }
6356    return true;
6357}
6358
6359void AudioPolicyManager::IOProfile::dump(int fd)
6360{
6361    const size_t SIZE = 256;
6362    char buffer[SIZE];
6363    String8 result;
6364
6365    AudioPort::dump(fd, 4);
6366
6367    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6368    result.append(buffer);
6369    snprintf(buffer, SIZE, "    - devices:\n");
6370    result.append(buffer);
6371    write(fd, result.string(), result.size());
6372    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6373        mSupportedDevices[i]->dump(fd, 6, i);
6374    }
6375}
6376
6377void AudioPolicyManager::IOProfile::log()
6378{
6379    const size_t SIZE = 256;
6380    char buffer[SIZE];
6381    String8 result;
6382
6383    ALOGV("    - sampling rates: ");
6384    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6385        ALOGV("  %d", mSamplingRates[i]);
6386    }
6387
6388    ALOGV("    - channel masks: ");
6389    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6390        ALOGV("  0x%04x", mChannelMasks[i]);
6391    }
6392
6393    ALOGV("    - formats: ");
6394    for (size_t i = 0; i < mFormats.size(); i++) {
6395        ALOGV("  0x%08x", mFormats[i]);
6396    }
6397
6398    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6399    ALOGV("    - flags: 0x%04x\n", mFlags);
6400}
6401
6402
6403// --- DeviceDescriptor implementation
6404
6405
6406AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6407                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6408                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6409                                                              AUDIO_PORT_ROLE_SOURCE,
6410                             NULL),
6411                     mDeviceType(type), mAddress(""), mId(0)
6412{
6413    mAudioPort = this;
6414    if (mGains.size() > 0) {
6415        mGains[0]->getDefaultConfig(&mGain);
6416    }
6417}
6418
6419bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6420{
6421    // Devices are considered equal if they:
6422    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6423    // - have the same address or one device does not specify the address
6424    // - have the same channel mask or one device does not specify the channel mask
6425    return (mDeviceType == other->mDeviceType) &&
6426           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6427           (mChannelMask == 0 || other->mChannelMask == 0 ||
6428                mChannelMask == other->mChannelMask);
6429}
6430
6431void AudioPolicyManager::DeviceVector::refreshTypes()
6432{
6433    mDeviceTypes = AUDIO_DEVICE_NONE;
6434    for(size_t i = 0; i < size(); i++) {
6435        mDeviceTypes |= itemAt(i)->mDeviceType;
6436    }
6437    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6438}
6439
6440ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6441{
6442    for(size_t i = 0; i < size(); i++) {
6443        if (item->equals(itemAt(i))) {
6444            return i;
6445        }
6446    }
6447    return -1;
6448}
6449
6450ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6451{
6452    ssize_t ret = indexOf(item);
6453
6454    if (ret < 0) {
6455        ret = SortedVector::add(item);
6456        if (ret >= 0) {
6457            refreshTypes();
6458        }
6459    } else {
6460        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6461        ret = -1;
6462    }
6463    return ret;
6464}
6465
6466ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6467{
6468    size_t i;
6469    ssize_t ret = indexOf(item);
6470
6471    if (ret < 0) {
6472        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6473    } else {
6474        ret = SortedVector::removeAt(ret);
6475        if (ret >= 0) {
6476            refreshTypes();
6477        }
6478    }
6479    return ret;
6480}
6481
6482void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6483{
6484    DeviceVector deviceList;
6485
6486    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6487    types &= ~role_bit;
6488
6489    while (types) {
6490        uint32_t i = 31 - __builtin_clz(types);
6491        uint32_t type = 1 << i;
6492        types &= ~type;
6493        add(new DeviceDescriptor(String8(""), type | role_bit));
6494    }
6495}
6496
6497void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6498                                                           const DeviceVector& declaredDevices)
6499{
6500    char *devName = strtok(name, "|");
6501    while (devName != NULL) {
6502        if (strlen(devName) != 0) {
6503            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6504                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6505                                 devName);
6506            if (type != AUDIO_DEVICE_NONE) {
6507                add(new DeviceDescriptor(String8(""), type));
6508            } else {
6509                sp<DeviceDescriptor> deviceDesc =
6510                        declaredDevices.getDeviceFromName(String8(devName));
6511                if (deviceDesc != 0) {
6512                    add(deviceDesc);
6513                }
6514            }
6515         }
6516        devName = strtok(NULL, "|");
6517     }
6518}
6519
6520sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6521                                                        audio_devices_t type, String8 address) const
6522{
6523    sp<DeviceDescriptor> device;
6524    for (size_t i = 0; i < size(); i++) {
6525        if (itemAt(i)->mDeviceType == type) {
6526            device = itemAt(i);
6527            if (itemAt(i)->mAddress = address) {
6528                break;
6529            }
6530        }
6531    }
6532    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6533          type, address.string(), device.get());
6534    return device;
6535}
6536
6537sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6538                                                                    audio_port_handle_t id) const
6539{
6540    sp<DeviceDescriptor> device;
6541    for (size_t i = 0; i < size(); i++) {
6542        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6543        if (itemAt(i)->mId == id) {
6544            device = itemAt(i);
6545            break;
6546        }
6547    }
6548    return device;
6549}
6550
6551AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6552                                                                        audio_devices_t type) const
6553{
6554    DeviceVector devices;
6555    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6556        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6557            devices.add(itemAt(i));
6558            type &= ~itemAt(i)->mDeviceType;
6559            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6560                  itemAt(i)->mDeviceType, itemAt(i).get());
6561        }
6562    }
6563    return devices;
6564}
6565
6566AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6567        audio_devices_t type, String8 address) const
6568{
6569    DeviceVector devices;
6570    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6571    for (size_t i = 0; i < size(); i++) {
6572        //ALOGV("     at i=%d: device=%x, addr=%s",
6573        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6574        if (itemAt(i)->mDeviceType == type) {
6575            if (itemAt(i)->mAddress == address) {
6576                //ALOGV("      found matching address %s", address.string());
6577                devices.add(itemAt(i));
6578            }
6579        }
6580    }
6581    return devices;
6582}
6583
6584sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6585        const String8& name) const
6586{
6587    sp<DeviceDescriptor> device;
6588    for (size_t i = 0; i < size(); i++) {
6589        if (itemAt(i)->mName == name) {
6590            device = itemAt(i);
6591            break;
6592        }
6593    }
6594    return device;
6595}
6596
6597void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6598                                                    struct audio_port_config *dstConfig,
6599                                                    const struct audio_port_config *srcConfig) const
6600{
6601    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6602    if (srcConfig != NULL) {
6603        dstConfig->config_mask |= srcConfig->config_mask;
6604    }
6605
6606    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6607
6608    dstConfig->id = mId;
6609    dstConfig->role = audio_is_output_device(mDeviceType) ?
6610                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6611    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6612    dstConfig->ext.device.type = mDeviceType;
6613    dstConfig->ext.device.hw_module = mModule->mHandle;
6614    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6615}
6616
6617void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6618{
6619    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6620    AudioPort::toAudioPort(port);
6621    port->id = mId;
6622    toAudioPortConfig(&port->active_config);
6623    port->ext.device.type = mDeviceType;
6624    port->ext.device.hw_module = mModule->mHandle;
6625    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6626}
6627
6628status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6629{
6630    const size_t SIZE = 256;
6631    char buffer[SIZE];
6632    String8 result;
6633
6634    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6635    result.append(buffer);
6636    if (mId != 0) {
6637        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6638        result.append(buffer);
6639    }
6640    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6641                                              enumToString(sDeviceNameToEnumTable,
6642                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6643                                                           mDeviceType));
6644    result.append(buffer);
6645    if (mAddress.size() != 0) {
6646        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6647        result.append(buffer);
6648    }
6649    write(fd, result.string(), result.size());
6650    AudioPort::dump(fd, spaces);
6651
6652    return NO_ERROR;
6653}
6654
6655
6656// --- audio_policy.conf file parsing
6657
6658audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6659{
6660    uint32_t flag = 0;
6661
6662    // it is OK to cast name to non const here as we are not going to use it after
6663    // strtok() modifies it
6664    char *flagName = strtok(name, "|");
6665    while (flagName != NULL) {
6666        if (strlen(flagName) != 0) {
6667            flag |= stringToEnum(sFlagNameToEnumTable,
6668                               ARRAY_SIZE(sFlagNameToEnumTable),
6669                               flagName);
6670        }
6671        flagName = strtok(NULL, "|");
6672    }
6673    //force direct flag if offload flag is set: offloading implies a direct output stream
6674    // and all common behaviors are driven by checking only the direct flag
6675    // this should normally be set appropriately in the policy configuration file
6676    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6677        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6678    }
6679
6680    return (audio_output_flags_t)flag;
6681}
6682
6683audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6684{
6685    uint32_t device = 0;
6686
6687    char *devName = strtok(name, "|");
6688    while (devName != NULL) {
6689        if (strlen(devName) != 0) {
6690            device |= stringToEnum(sDeviceNameToEnumTable,
6691                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6692                                 devName);
6693         }
6694        devName = strtok(NULL, "|");
6695     }
6696    return device;
6697}
6698
6699void AudioPolicyManager::loadHwModule(cnode *root)
6700{
6701    status_t status = NAME_NOT_FOUND;
6702    cnode *node;
6703    sp<HwModule> module = new HwModule(root->name);
6704
6705    node = config_find(root, DEVICES_TAG);
6706    if (node != NULL) {
6707        node = node->first_child;
6708        while (node) {
6709            ALOGV("loadHwModule() loading device %s", node->name);
6710            status_t tmpStatus = module->loadDevice(node);
6711            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6712                status = tmpStatus;
6713            }
6714            node = node->next;
6715        }
6716    }
6717    node = config_find(root, OUTPUTS_TAG);
6718    if (node != NULL) {
6719        node = node->first_child;
6720        while (node) {
6721            ALOGV("loadHwModule() loading output %s", node->name);
6722            status_t tmpStatus = module->loadOutput(node);
6723            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6724                status = tmpStatus;
6725            }
6726            node = node->next;
6727        }
6728    }
6729    node = config_find(root, INPUTS_TAG);
6730    if (node != NULL) {
6731        node = node->first_child;
6732        while (node) {
6733            ALOGV("loadHwModule() loading input %s", node->name);
6734            status_t tmpStatus = module->loadInput(node);
6735            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6736                status = tmpStatus;
6737            }
6738            node = node->next;
6739        }
6740    }
6741    loadGlobalConfig(root, module);
6742
6743    if (status == NO_ERROR) {
6744        mHwModules.add(module);
6745    }
6746}
6747
6748void AudioPolicyManager::loadHwModules(cnode *root)
6749{
6750    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6751    if (node == NULL) {
6752        return;
6753    }
6754
6755    node = node->first_child;
6756    while (node) {
6757        ALOGV("loadHwModules() loading module %s", node->name);
6758        loadHwModule(node);
6759        node = node->next;
6760    }
6761}
6762
6763void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6764{
6765    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6766
6767    if (node == NULL) {
6768        return;
6769    }
6770    DeviceVector declaredDevices;
6771    if (module != NULL) {
6772        declaredDevices = module->mDeclaredDevices;
6773    }
6774
6775    node = node->first_child;
6776    while (node) {
6777        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6778            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6779                                                        declaredDevices);
6780            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6781                  mAvailableOutputDevices.types());
6782        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6783            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6784                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6785                                              (char *)node->value);
6786            if (device != AUDIO_DEVICE_NONE) {
6787                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6788            } else {
6789                ALOGW("loadGlobalConfig() default device not specified");
6790            }
6791            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6792        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6793            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6794                                                       declaredDevices);
6795            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6796        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6797            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6798            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6799        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6800            uint32_t major, minor;
6801            sscanf((char *)node->value, "%u.%u", &major, &minor);
6802            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6803            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6804                  module->mHalVersion, major, minor);
6805        }
6806        node = node->next;
6807    }
6808}
6809
6810status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6811{
6812    cnode *root;
6813    char *data;
6814
6815    data = (char *)load_file(path, NULL);
6816    if (data == NULL) {
6817        return -ENODEV;
6818    }
6819    root = config_node("", "");
6820    config_load(root, data);
6821
6822    loadHwModules(root);
6823    // legacy audio_policy.conf files have one global_configuration section
6824    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
6825    config_free(root);
6826    free(root);
6827    free(data);
6828
6829    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
6830
6831    return NO_ERROR;
6832}
6833
6834void AudioPolicyManager::defaultAudioPolicyConfig(void)
6835{
6836    sp<HwModule> module;
6837    sp<IOProfile> profile;
6838    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
6839                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
6840    mAvailableOutputDevices.add(mDefaultOutputDevice);
6841    mAvailableInputDevices.add(defaultInputDevice);
6842
6843    module = new HwModule("primary");
6844
6845    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
6846    profile->mSamplingRates.add(44100);
6847    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6848    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
6849    profile->mSupportedDevices.add(mDefaultOutputDevice);
6850    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
6851    module->mOutputProfiles.add(profile);
6852
6853    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
6854    profile->mSamplingRates.add(8000);
6855    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6856    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
6857    profile->mSupportedDevices.add(defaultInputDevice);
6858    module->mInputProfiles.add(profile);
6859
6860    mHwModules.add(module);
6861}
6862
6863audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
6864{
6865    // flags to stream type mapping
6866    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
6867        return AUDIO_STREAM_ENFORCED_AUDIBLE;
6868    }
6869    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
6870        return AUDIO_STREAM_BLUETOOTH_SCO;
6871    }
6872
6873    // usage to stream type mapping
6874    switch (attr->usage) {
6875    case AUDIO_USAGE_MEDIA:
6876    case AUDIO_USAGE_GAME:
6877    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
6878    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
6879        return AUDIO_STREAM_MUSIC;
6880    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
6881        return AUDIO_STREAM_SYSTEM;
6882    case AUDIO_USAGE_VOICE_COMMUNICATION:
6883        return AUDIO_STREAM_VOICE_CALL;
6884
6885    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
6886        return AUDIO_STREAM_DTMF;
6887
6888    case AUDIO_USAGE_ALARM:
6889        return AUDIO_STREAM_ALARM;
6890    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
6891        return AUDIO_STREAM_RING;
6892
6893    case AUDIO_USAGE_NOTIFICATION:
6894    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
6895    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
6896    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
6897    case AUDIO_USAGE_NOTIFICATION_EVENT:
6898        return AUDIO_STREAM_NOTIFICATION;
6899
6900    case AUDIO_USAGE_UNKNOWN:
6901    default:
6902        return AUDIO_STREAM_MUSIC;
6903    }
6904}
6905}; // namespace android
6906