AudioPolicyManager.cpp revision 4d41695d45e2c7211899afa94b20e32120b2b7e0 
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    snprintf(buffer, SIZE, "\nAudio Patches:\n");
1849    write(fd, buffer, strlen(buffer));
1850    for (size_t i = 0; i < mAudioPatches.size(); i++) {
1851        mAudioPatches[i]->dump(fd, 2, i);
1852    }
1853
1854    return NO_ERROR;
1855}
1856
1857// This function checks for the parameters which can be offloaded.
1858// This can be enhanced depending on the capability of the DSP and policy
1859// of the system.
1860bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1861{
1862    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1863     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1864     offloadInfo.sample_rate, offloadInfo.channel_mask,
1865     offloadInfo.format,
1866     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1867     offloadInfo.has_video);
1868
1869    // Check if offload has been disabled
1870    char propValue[PROPERTY_VALUE_MAX];
1871    if (property_get("audio.offload.disable", propValue, "0")) {
1872        if (atoi(propValue) != 0) {
1873            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1874            return false;
1875        }
1876    }
1877
1878    // Check if stream type is music, then only allow offload as of now.
1879    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1880    {
1881        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1882        return false;
1883    }
1884
1885    //TODO: enable audio offloading with video when ready
1886    if (offloadInfo.has_video)
1887    {
1888        ALOGV("isOffloadSupported: has_video == true, returning false");
1889        return false;
1890    }
1891
1892    //If duration is less than minimum value defined in property, return false
1893    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1894        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1895            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1896            return false;
1897        }
1898    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1899        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1900        return false;
1901    }
1902
1903    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1904    // creating an offloaded track and tearing it down immediately after start when audioflinger
1905    // detects there is an active non offloadable effect.
1906    // FIXME: We should check the audio session here but we do not have it in this context.
1907    // This may prevent offloading in rare situations where effects are left active by apps
1908    // in the background.
1909    if (isNonOffloadableEffectEnabled()) {
1910        return false;
1911    }
1912
1913    // See if there is a profile to support this.
1914    // AUDIO_DEVICE_NONE
1915    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1916                                            offloadInfo.sample_rate,
1917                                            offloadInfo.format,
1918                                            offloadInfo.channel_mask,
1919                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1920    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1921    return (profile != 0);
1922}
1923
1924status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1925                                            audio_port_type_t type,
1926                                            unsigned int *num_ports,
1927                                            struct audio_port *ports,
1928                                            unsigned int *generation)
1929{
1930    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1931            generation == NULL) {
1932        return BAD_VALUE;
1933    }
1934    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1935    if (ports == NULL) {
1936        *num_ports = 0;
1937    }
1938
1939    size_t portsWritten = 0;
1940    size_t portsMax = *num_ports;
1941    *num_ports = 0;
1942    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1943        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1944            for (size_t i = 0;
1945                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1946                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1947            }
1948            *num_ports += mAvailableOutputDevices.size();
1949        }
1950        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1951            for (size_t i = 0;
1952                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1953                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1954            }
1955            *num_ports += mAvailableInputDevices.size();
1956        }
1957    }
1958    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1959        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1960            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1961                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1962            }
1963            *num_ports += mInputs.size();
1964        }
1965        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1966            size_t numOutputs = 0;
1967            for (size_t i = 0; i < mOutputs.size(); i++) {
1968                if (!mOutputs[i]->isDuplicated()) {
1969                    numOutputs++;
1970                    if (portsWritten < portsMax) {
1971                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
1972                    }
1973                }
1974            }
1975            *num_ports += numOutputs;
1976        }
1977    }
1978    *generation = curAudioPortGeneration();
1979    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
1980    return NO_ERROR;
1981}
1982
1983status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
1984{
1985    return NO_ERROR;
1986}
1987
1988sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
1989                                                                    audio_port_handle_t id) const
1990{
1991    sp<AudioOutputDescriptor> outputDesc = NULL;
1992    for (size_t i = 0; i < mOutputs.size(); i++) {
1993        outputDesc = mOutputs.valueAt(i);
1994        if (outputDesc->mId == id) {
1995            break;
1996        }
1997    }
1998    return outputDesc;
1999}
2000
2001sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2002                                                                    audio_port_handle_t id) const
2003{
2004    sp<AudioInputDescriptor> inputDesc = NULL;
2005    for (size_t i = 0; i < mInputs.size(); i++) {
2006        inputDesc = mInputs.valueAt(i);
2007        if (inputDesc->mId == id) {
2008            break;
2009        }
2010    }
2011    return inputDesc;
2012}
2013
2014sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2015                                                                    audio_devices_t device) const
2016{
2017    sp <HwModule> module;
2018
2019    for (size_t i = 0; i < mHwModules.size(); i++) {
2020        if (mHwModules[i]->mHandle == 0) {
2021            continue;
2022        }
2023        if (audio_is_output_device(device)) {
2024            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2025            {
2026                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2027                    return mHwModules[i];
2028                }
2029            }
2030        } else {
2031            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2032                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2033                        device & ~AUDIO_DEVICE_BIT_IN) {
2034                    return mHwModules[i];
2035                }
2036            }
2037        }
2038    }
2039    return module;
2040}
2041
2042sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2043{
2044    sp <HwModule> module;
2045
2046    for (size_t i = 0; i < mHwModules.size(); i++)
2047    {
2048        if (strcmp(mHwModules[i]->mName, name) == 0) {
2049            return mHwModules[i];
2050        }
2051    }
2052    return module;
2053}
2054
2055audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2056{
2057    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2058    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2059    return devices & mAvailableOutputDevices.types();
2060}
2061
2062audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2063{
2064    audio_module_handle_t primaryHandle =
2065                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2066    audio_devices_t devices = AUDIO_DEVICE_NONE;
2067    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2068        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2069            devices |= mAvailableInputDevices[i]->mDeviceType;
2070        }
2071    }
2072    return devices;
2073}
2074
2075status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2076                                               audio_patch_handle_t *handle,
2077                                               uid_t uid)
2078{
2079    ALOGV("createAudioPatch()");
2080
2081    if (handle == NULL || patch == NULL) {
2082        return BAD_VALUE;
2083    }
2084    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2085
2086    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2087            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2088        return BAD_VALUE;
2089    }
2090    // only one source per audio patch supported for now
2091    if (patch->num_sources > 1) {
2092        return INVALID_OPERATION;
2093    }
2094
2095    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2096        return INVALID_OPERATION;
2097    }
2098    for (size_t i = 0; i < patch->num_sinks; i++) {
2099        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2100            return INVALID_OPERATION;
2101        }
2102    }
2103
2104    sp<AudioPatch> patchDesc;
2105    ssize_t index = mAudioPatches.indexOfKey(*handle);
2106
2107    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2108                                                           patch->sources[0].role,
2109                                                           patch->sources[0].type);
2110#if LOG_NDEBUG == 0
2111    for (size_t i = 0; i < patch->num_sinks; i++) {
2112        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2113                                                             patch->sinks[i].role,
2114                                                             patch->sinks[i].type);
2115    }
2116#endif
2117
2118    if (index >= 0) {
2119        patchDesc = mAudioPatches.valueAt(index);
2120        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2121                                                                  mUidCached, patchDesc->mUid, uid);
2122        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2123            return INVALID_OPERATION;
2124        }
2125    } else {
2126        *handle = 0;
2127    }
2128
2129    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2130        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2131        if (outputDesc == NULL) {
2132            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2133            return BAD_VALUE;
2134        }
2135        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2136                                                outputDesc->mIoHandle);
2137        if (patchDesc != 0) {
2138            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2139                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2140                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2141                return BAD_VALUE;
2142            }
2143        }
2144        DeviceVector devices;
2145        for (size_t i = 0; i < patch->num_sinks; i++) {
2146            // Only support mix to devices connection
2147            // TODO add support for mix to mix connection
2148            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2149                ALOGV("createAudioPatch() source mix but sink is not a device");
2150                return INVALID_OPERATION;
2151            }
2152            sp<DeviceDescriptor> devDesc =
2153                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2154            if (devDesc == 0) {
2155                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2156                return BAD_VALUE;
2157            }
2158
2159            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2160                                                           patch->sources[0].sample_rate,
2161                                                         NULL,  // updatedSamplingRate
2162                                                         patch->sources[0].format,
2163                                                         patch->sources[0].channel_mask,
2164                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2165                ALOGV("createAudioPatch() profile not supported for device %08x",
2166                      devDesc->mDeviceType);
2167                return INVALID_OPERATION;
2168            }
2169            devices.add(devDesc);
2170        }
2171        if (devices.size() == 0) {
2172            return INVALID_OPERATION;
2173        }
2174
2175        // TODO: reconfigure output format and channels here
2176        ALOGV("createAudioPatch() setting device %08x on output %d",
2177              devices.types(), outputDesc->mIoHandle);
2178        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2179        index = mAudioPatches.indexOfKey(*handle);
2180        if (index >= 0) {
2181            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2182                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2183            }
2184            patchDesc = mAudioPatches.valueAt(index);
2185            patchDesc->mUid = uid;
2186            ALOGV("createAudioPatch() success");
2187        } else {
2188            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2189            return INVALID_OPERATION;
2190        }
2191    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2192        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2193            // input device to input mix connection
2194            // only one sink supported when connecting an input device to a mix
2195            if (patch->num_sinks > 1) {
2196                return INVALID_OPERATION;
2197            }
2198            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2199            if (inputDesc == NULL) {
2200                return BAD_VALUE;
2201            }
2202            if (patchDesc != 0) {
2203                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2204                    return BAD_VALUE;
2205                }
2206            }
2207            sp<DeviceDescriptor> devDesc =
2208                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2209            if (devDesc == 0) {
2210                return BAD_VALUE;
2211            }
2212
2213            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2214                                                         patch->sinks[0].sample_rate,
2215                                                         NULL, /*updatedSampleRate*/
2216                                                         patch->sinks[0].format,
2217                                                         patch->sinks[0].channel_mask,
2218                                                         // FIXME for the parameter type,
2219                                                         // and the NONE
2220                                                         (audio_output_flags_t)
2221                                                            AUDIO_INPUT_FLAG_NONE)) {
2222                return INVALID_OPERATION;
2223            }
2224            // TODO: reconfigure output format and channels here
2225            ALOGV("createAudioPatch() setting device %08x on output %d",
2226                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2227            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2228            index = mAudioPatches.indexOfKey(*handle);
2229            if (index >= 0) {
2230                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2231                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2232                }
2233                patchDesc = mAudioPatches.valueAt(index);
2234                patchDesc->mUid = uid;
2235                ALOGV("createAudioPatch() success");
2236            } else {
2237                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2238                return INVALID_OPERATION;
2239            }
2240        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2241            // device to device connection
2242            if (patchDesc != 0) {
2243                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2244                    return BAD_VALUE;
2245                }
2246            }
2247            sp<DeviceDescriptor> srcDeviceDesc =
2248                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2249
2250            //update source and sink with our own data as the data passed in the patch may
2251            // be incomplete.
2252            struct audio_patch newPatch = *patch;
2253            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2254            if (srcDeviceDesc == 0) {
2255                return BAD_VALUE;
2256            }
2257
2258            for (size_t i = 0; i < patch->num_sinks; i++) {
2259                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2260                    ALOGV("createAudioPatch() source device but one sink is not a device");
2261                    return INVALID_OPERATION;
2262                }
2263
2264                sp<DeviceDescriptor> sinkDeviceDesc =
2265                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2266                if (sinkDeviceDesc == 0) {
2267                    return BAD_VALUE;
2268                }
2269                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2270
2271                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2272                    // only one sink supported when connected devices across HW modules
2273                    if (patch->num_sinks > 1) {
2274                        return INVALID_OPERATION;
2275                    }
2276                    SortedVector<audio_io_handle_t> outputs =
2277                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2278                                                                mOutputs);
2279                    // if the sink device is reachable via an opened output stream, request to go via
2280                    // this output stream by adding a second source to the patch description
2281                    audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
2282                    if (output != AUDIO_IO_HANDLE_NONE) {
2283                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2284                        if (outputDesc->isDuplicated()) {
2285                            return INVALID_OPERATION;
2286                        }
2287                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2288                        newPatch.num_sources = 2;
2289                    }
2290                }
2291            }
2292            // TODO: check from routing capabilities in config file and other conflicting patches
2293
2294            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2295            if (index >= 0) {
2296                afPatchHandle = patchDesc->mAfPatchHandle;
2297            }
2298
2299            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2300                                                                  &afPatchHandle,
2301                                                                  0);
2302            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2303                                                                  status, afPatchHandle);
2304            if (status == NO_ERROR) {
2305                if (index < 0) {
2306                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2307                                               &newPatch, uid);
2308                    addAudioPatch(patchDesc->mHandle, patchDesc);
2309                } else {
2310                    patchDesc->mPatch = newPatch;
2311                }
2312                patchDesc->mAfPatchHandle = afPatchHandle;
2313                *handle = patchDesc->mHandle;
2314                nextAudioPortGeneration();
2315                mpClientInterface->onAudioPatchListUpdate();
2316            } else {
2317                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2318                status);
2319                return INVALID_OPERATION;
2320            }
2321        } else {
2322            return BAD_VALUE;
2323        }
2324    } else {
2325        return BAD_VALUE;
2326    }
2327    return NO_ERROR;
2328}
2329
2330status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2331                                                  uid_t uid)
2332{
2333    ALOGV("releaseAudioPatch() patch %d", handle);
2334
2335    ssize_t index = mAudioPatches.indexOfKey(handle);
2336
2337    if (index < 0) {
2338        return BAD_VALUE;
2339    }
2340    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2341    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2342          mUidCached, patchDesc->mUid, uid);
2343    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2344        return INVALID_OPERATION;
2345    }
2346
2347    struct audio_patch *patch = &patchDesc->mPatch;
2348    patchDesc->mUid = mUidCached;
2349    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2350        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2351        if (outputDesc == NULL) {
2352            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2353            return BAD_VALUE;
2354        }
2355
2356        setOutputDevice(outputDesc->mIoHandle,
2357                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2358                       true,
2359                       0,
2360                       NULL);
2361    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2362        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2363            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2364            if (inputDesc == NULL) {
2365                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2366                return BAD_VALUE;
2367            }
2368            setInputDevice(inputDesc->mIoHandle,
2369                           getNewInputDevice(inputDesc->mIoHandle),
2370                           true,
2371                           NULL);
2372        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2373            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2374            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2375            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2376                                                              status, patchDesc->mAfPatchHandle);
2377            removeAudioPatch(patchDesc->mHandle);
2378            nextAudioPortGeneration();
2379            mpClientInterface->onAudioPatchListUpdate();
2380        } else {
2381            return BAD_VALUE;
2382        }
2383    } else {
2384        return BAD_VALUE;
2385    }
2386    return NO_ERROR;
2387}
2388
2389status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2390                                              struct audio_patch *patches,
2391                                              unsigned int *generation)
2392{
2393    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2394            generation == NULL) {
2395        return BAD_VALUE;
2396    }
2397    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2398          *num_patches, patches, mAudioPatches.size());
2399    if (patches == NULL) {
2400        *num_patches = 0;
2401    }
2402
2403    size_t patchesWritten = 0;
2404    size_t patchesMax = *num_patches;
2405    for (size_t i = 0;
2406            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2407        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2408        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2409        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2410              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2411    }
2412    *num_patches = mAudioPatches.size();
2413
2414    *generation = curAudioPortGeneration();
2415    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2416    return NO_ERROR;
2417}
2418
2419status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2420{
2421    ALOGV("setAudioPortConfig()");
2422
2423    if (config == NULL) {
2424        return BAD_VALUE;
2425    }
2426    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2427    // Only support gain configuration for now
2428    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2429        return INVALID_OPERATION;
2430    }
2431
2432    sp<AudioPortConfig> audioPortConfig;
2433    if (config->type == AUDIO_PORT_TYPE_MIX) {
2434        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2435            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2436            if (outputDesc == NULL) {
2437                return BAD_VALUE;
2438            }
2439            ALOG_ASSERT(!outputDesc->isDuplicated(),
2440                        "setAudioPortConfig() called on duplicated output %d",
2441                        outputDesc->mIoHandle);
2442            audioPortConfig = outputDesc;
2443        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2444            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2445            if (inputDesc == NULL) {
2446                return BAD_VALUE;
2447            }
2448            audioPortConfig = inputDesc;
2449        } else {
2450            return BAD_VALUE;
2451        }
2452    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2453        sp<DeviceDescriptor> deviceDesc;
2454        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2455            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2456        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2457            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2458        } else {
2459            return BAD_VALUE;
2460        }
2461        if (deviceDesc == NULL) {
2462            return BAD_VALUE;
2463        }
2464        audioPortConfig = deviceDesc;
2465    } else {
2466        return BAD_VALUE;
2467    }
2468
2469    struct audio_port_config backupConfig;
2470    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2471    if (status == NO_ERROR) {
2472        struct audio_port_config newConfig;
2473        audioPortConfig->toAudioPortConfig(&newConfig, config);
2474        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2475    }
2476    if (status != NO_ERROR) {
2477        audioPortConfig->applyAudioPortConfig(&backupConfig);
2478    }
2479
2480    return status;
2481}
2482
2483void AudioPolicyManager::clearAudioPatches(uid_t uid)
2484{
2485    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2486        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2487        if (patchDesc->mUid == uid) {
2488            // releaseAudioPatch() removes the patch from mAudioPatches
2489            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2490                i--;
2491            }
2492        }
2493    }
2494}
2495
2496status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2497                                       audio_io_handle_t *ioHandle,
2498                                       audio_devices_t *device)
2499{
2500    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2501    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2502    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2503
2504    mSoundTriggerSessions.add(*session, *ioHandle);
2505
2506    return NO_ERROR;
2507}
2508
2509status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2510{
2511    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2512    if (index < 0) {
2513        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2514        return BAD_VALUE;
2515    }
2516
2517    mSoundTriggerSessions.removeItem(session);
2518    return NO_ERROR;
2519}
2520
2521status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2522                                           const sp<AudioPatch>& patch)
2523{
2524    ssize_t index = mAudioPatches.indexOfKey(handle);
2525
2526    if (index >= 0) {
2527        ALOGW("addAudioPatch() patch %d already in", handle);
2528        return ALREADY_EXISTS;
2529    }
2530    mAudioPatches.add(handle, patch);
2531    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2532            "sink handle %d",
2533          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2534          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2535    return NO_ERROR;
2536}
2537
2538status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2539{
2540    ssize_t index = mAudioPatches.indexOfKey(handle);
2541
2542    if (index < 0) {
2543        ALOGW("removeAudioPatch() patch %d not in", handle);
2544        return ALREADY_EXISTS;
2545    }
2546    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2547                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2548    mAudioPatches.removeItemsAt(index);
2549    return NO_ERROR;
2550}
2551
2552// ----------------------------------------------------------------------------
2553// AudioPolicyManager
2554// ----------------------------------------------------------------------------
2555
2556uint32_t AudioPolicyManager::nextUniqueId()
2557{
2558    return android_atomic_inc(&mNextUniqueId);
2559}
2560
2561uint32_t AudioPolicyManager::nextAudioPortGeneration()
2562{
2563    return android_atomic_inc(&mAudioPortGeneration);
2564}
2565
2566AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2567    :
2568#ifdef AUDIO_POLICY_TEST
2569    Thread(false),
2570#endif //AUDIO_POLICY_TEST
2571    mPrimaryOutput((audio_io_handle_t)0),
2572    mPhoneState(AUDIO_MODE_NORMAL),
2573    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2574    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2575    mA2dpSuspended(false),
2576    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2577    mAudioPortGeneration(1)
2578{
2579    mUidCached = getuid();
2580    mpClientInterface = clientInterface;
2581
2582    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2583        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2584    }
2585
2586    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2587    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2588        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2589            ALOGE("could not load audio policy configuration file, setting defaults");
2590            defaultAudioPolicyConfig();
2591        }
2592    }
2593    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2594
2595    // must be done after reading the policy
2596    initializeVolumeCurves();
2597
2598    // open all output streams needed to access attached devices
2599    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2600    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2601    for (size_t i = 0; i < mHwModules.size(); i++) {
2602        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2603        if (mHwModules[i]->mHandle == 0) {
2604            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2605            continue;
2606        }
2607        // open all output streams needed to access attached devices
2608        // except for direct output streams that are only opened when they are actually
2609        // required by an app.
2610        // This also validates mAvailableOutputDevices list
2611        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2612        {
2613            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2614
2615            if (outProfile->mSupportedDevices.isEmpty()) {
2616                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2617                continue;
2618            }
2619
2620            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2621            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2622                profileType = mDefaultOutputDevice->mDeviceType;
2623            } else {
2624                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2625            }
2626            if ((profileType & outputDeviceTypes) &&
2627                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2628                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2629
2630                outputDesc->mDevice = profileType;
2631                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2632                config.sample_rate = outputDesc->mSamplingRate;
2633                config.channel_mask = outputDesc->mChannelMask;
2634                config.format = outputDesc->mFormat;
2635                audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2636                status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2637                                                                &output,
2638                                                                &config,
2639                                                                &outputDesc->mDevice,
2640                                                                String8(""),
2641                                                                &outputDesc->mLatency,
2642                                                                outputDesc->mFlags);
2643
2644                if (status != NO_ERROR) {
2645                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2646                          outputDesc->mDevice,
2647                          mHwModules[i]->mName);
2648                } else {
2649                    outputDesc->mSamplingRate = config.sample_rate;
2650                    outputDesc->mChannelMask = config.channel_mask;
2651                    outputDesc->mFormat = config.format;
2652
2653                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2654                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2655                        ssize_t index =
2656                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2657                        // give a valid ID to an attached device once confirmed it is reachable
2658                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2659                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2660                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2661                        }
2662                    }
2663                    if (mPrimaryOutput == 0 &&
2664                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2665                        mPrimaryOutput = output;
2666                    }
2667                    addOutput(output, outputDesc);
2668                    setOutputDevice(output,
2669                                    outputDesc->mDevice,
2670                                    true);
2671                }
2672            }
2673        }
2674        // open input streams needed to access attached devices to validate
2675        // mAvailableInputDevices list
2676        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2677        {
2678            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2679
2680            if (inProfile->mSupportedDevices.isEmpty()) {
2681                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2682                continue;
2683            }
2684
2685            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2686            if (profileType & inputDeviceTypes) {
2687                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2688
2689                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2690                inputDesc->mDevice = profileType;
2691
2692                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2693                config.sample_rate = inputDesc->mSamplingRate;
2694                config.channel_mask = inputDesc->mChannelMask;
2695                config.format = inputDesc->mFormat;
2696                audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2697                status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2698                                                               &input,
2699                                                               &config,
2700                                                               &inputDesc->mDevice,
2701                                                               String8(""),
2702                                                               AUDIO_SOURCE_MIC,
2703                                                               AUDIO_INPUT_FLAG_NONE);
2704
2705                if (status == NO_ERROR) {
2706                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2707                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2708                        ssize_t index =
2709                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2710                        // give a valid ID to an attached device once confirmed it is reachable
2711                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2712                            mAvailableInputDevices[index]->mId = nextUniqueId();
2713                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2714                        }
2715                    }
2716                    mpClientInterface->closeInput(input);
2717                } else {
2718                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2719                          inputDesc->mDevice,
2720                          mHwModules[i]->mName);
2721                }
2722            }
2723        }
2724    }
2725    // make sure all attached devices have been allocated a unique ID
2726    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2727        if (mAvailableOutputDevices[i]->mId == 0) {
2728            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2729            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2730            continue;
2731        }
2732        i++;
2733    }
2734    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2735        if (mAvailableInputDevices[i]->mId == 0) {
2736            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2737            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2738            continue;
2739        }
2740        i++;
2741    }
2742    // make sure default device is reachable
2743    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2744        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2745    }
2746
2747    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2748
2749    updateDevicesAndOutputs();
2750
2751#ifdef AUDIO_POLICY_TEST
2752    if (mPrimaryOutput != 0) {
2753        AudioParameter outputCmd = AudioParameter();
2754        outputCmd.addInt(String8("set_id"), 0);
2755        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2756
2757        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2758        mTestSamplingRate = 44100;
2759        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2760        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2761        mTestLatencyMs = 0;
2762        mCurOutput = 0;
2763        mDirectOutput = false;
2764        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2765            mTestOutputs[i] = 0;
2766        }
2767
2768        const size_t SIZE = 256;
2769        char buffer[SIZE];
2770        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2771        run(buffer, ANDROID_PRIORITY_AUDIO);
2772    }
2773#endif //AUDIO_POLICY_TEST
2774}
2775
2776AudioPolicyManager::~AudioPolicyManager()
2777{
2778#ifdef AUDIO_POLICY_TEST
2779    exit();
2780#endif //AUDIO_POLICY_TEST
2781   for (size_t i = 0; i < mOutputs.size(); i++) {
2782        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2783   }
2784   for (size_t i = 0; i < mInputs.size(); i++) {
2785        mpClientInterface->closeInput(mInputs.keyAt(i));
2786   }
2787   mAvailableOutputDevices.clear();
2788   mAvailableInputDevices.clear();
2789   mOutputs.clear();
2790   mInputs.clear();
2791   mHwModules.clear();
2792}
2793
2794status_t AudioPolicyManager::initCheck()
2795{
2796    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2797}
2798
2799#ifdef AUDIO_POLICY_TEST
2800bool AudioPolicyManager::threadLoop()
2801{
2802    ALOGV("entering threadLoop()");
2803    while (!exitPending())
2804    {
2805        String8 command;
2806        int valueInt;
2807        String8 value;
2808
2809        Mutex::Autolock _l(mLock);
2810        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2811
2812        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2813        AudioParameter param = AudioParameter(command);
2814
2815        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2816            valueInt != 0) {
2817            ALOGV("Test command %s received", command.string());
2818            String8 target;
2819            if (param.get(String8("target"), target) != NO_ERROR) {
2820                target = "Manager";
2821            }
2822            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2823                param.remove(String8("test_cmd_policy_output"));
2824                mCurOutput = valueInt;
2825            }
2826            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2827                param.remove(String8("test_cmd_policy_direct"));
2828                if (value == "false") {
2829                    mDirectOutput = false;
2830                } else if (value == "true") {
2831                    mDirectOutput = true;
2832                }
2833            }
2834            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2835                param.remove(String8("test_cmd_policy_input"));
2836                mTestInput = valueInt;
2837            }
2838
2839            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2840                param.remove(String8("test_cmd_policy_format"));
2841                int format = AUDIO_FORMAT_INVALID;
2842                if (value == "PCM 16 bits") {
2843                    format = AUDIO_FORMAT_PCM_16_BIT;
2844                } else if (value == "PCM 8 bits") {
2845                    format = AUDIO_FORMAT_PCM_8_BIT;
2846                } else if (value == "Compressed MP3") {
2847                    format = AUDIO_FORMAT_MP3;
2848                }
2849                if (format != AUDIO_FORMAT_INVALID) {
2850                    if (target == "Manager") {
2851                        mTestFormat = format;
2852                    } else if (mTestOutputs[mCurOutput] != 0) {
2853                        AudioParameter outputParam = AudioParameter();
2854                        outputParam.addInt(String8("format"), format);
2855                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2856                    }
2857                }
2858            }
2859            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2860                param.remove(String8("test_cmd_policy_channels"));
2861                int channels = 0;
2862
2863                if (value == "Channels Stereo") {
2864                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2865                } else if (value == "Channels Mono") {
2866                    channels =  AUDIO_CHANNEL_OUT_MONO;
2867                }
2868                if (channels != 0) {
2869                    if (target == "Manager") {
2870                        mTestChannels = channels;
2871                    } else if (mTestOutputs[mCurOutput] != 0) {
2872                        AudioParameter outputParam = AudioParameter();
2873                        outputParam.addInt(String8("channels"), channels);
2874                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2875                    }
2876                }
2877            }
2878            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2879                param.remove(String8("test_cmd_policy_sampleRate"));
2880                if (valueInt >= 0 && valueInt <= 96000) {
2881                    int samplingRate = valueInt;
2882                    if (target == "Manager") {
2883                        mTestSamplingRate = samplingRate;
2884                    } else if (mTestOutputs[mCurOutput] != 0) {
2885                        AudioParameter outputParam = AudioParameter();
2886                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2887                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2888                    }
2889                }
2890            }
2891
2892            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2893                param.remove(String8("test_cmd_policy_reopen"));
2894
2895                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2896                mpClientInterface->closeOutput(mPrimaryOutput);
2897
2898                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2899
2900                mOutputs.removeItem(mPrimaryOutput);
2901
2902                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2903                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2904                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2905                config.sample_rate = outputDesc->mSamplingRate;
2906                config.channel_mask = outputDesc->mChannelMask;
2907                config.format = outputDesc->mFormat;
2908                status_t status = mpClientInterface->openOutput(moduleHandle,
2909                                                                &mPrimaryOutput,
2910                                                                &config,
2911                                                                &outputDesc->mDevice,
2912                                                                String8(""),
2913                                                                &outputDesc->mLatency,
2914                                                                outputDesc->mFlags);
2915                if (status != NO_ERROR) {
2916                    ALOGE("Failed to reopen hardware output stream, "
2917                        "samplingRate: %d, format %d, channels %d",
2918                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2919                } else {
2920                    outputDesc->mSamplingRate = config.sample_rate;
2921                    outputDesc->mChannelMask = config.channel_mask;
2922                    outputDesc->mFormat = config.format;
2923                    AudioParameter outputCmd = AudioParameter();
2924                    outputCmd.addInt(String8("set_id"), 0);
2925                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2926                    addOutput(mPrimaryOutput, outputDesc);
2927                }
2928            }
2929
2930
2931            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2932        }
2933    }
2934    return false;
2935}
2936
2937void AudioPolicyManager::exit()
2938{
2939    {
2940        AutoMutex _l(mLock);
2941        requestExit();
2942        mWaitWorkCV.signal();
2943    }
2944    requestExitAndWait();
2945}
2946
2947int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2948{
2949    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2950        if (output == mTestOutputs[i]) return i;
2951    }
2952    return 0;
2953}
2954#endif //AUDIO_POLICY_TEST
2955
2956// ---
2957
2958void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2959{
2960    outputDesc->mIoHandle = output;
2961    outputDesc->mId = nextUniqueId();
2962    mOutputs.add(output, outputDesc);
2963    nextAudioPortGeneration();
2964}
2965
2966void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2967{
2968    inputDesc->mIoHandle = input;
2969    inputDesc->mId = nextUniqueId();
2970    mInputs.add(input, inputDesc);
2971    nextAudioPortGeneration();
2972}
2973
2974void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
2975        const String8 address /*in*/,
2976        SortedVector<audio_io_handle_t>& outputs /*out*/) {
2977    // look for a match on the given address on the addresses of the outputs:
2978    // find the address by finding the patch that maps to this output
2979    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
2980    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
2981    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
2982    if (patchIdx >= 0) {
2983        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
2984        const int numSinks = patchDesc->mPatch.num_sinks;
2985        for (ssize_t j=0; j < numSinks; j++) {
2986            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
2987                const char* patchAddr =
2988                        patchDesc->mPatch.sinks[j].ext.device.address;
2989                if (strncmp(patchAddr,
2990                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
2991                    ALOGV("checkOutputsForDevice(): adding opened output %d on same address %s",
2992                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
2993                    outputs.add(desc->mIoHandle);
2994                    break;
2995                }
2996            }
2997        }
2998    }
2999}
3000
3001status_t AudioPolicyManager::checkOutputsForDevice(audio_devices_t device,
3002                                                       audio_policy_dev_state_t state,
3003                                                       SortedVector<audio_io_handle_t>& outputs,
3004                                                       const String8 address)
3005{
3006    sp<AudioOutputDescriptor> desc;
3007
3008    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3009        // first list already open outputs that can be routed to this device
3010        for (size_t i = 0; i < mOutputs.size(); i++) {
3011            desc = mOutputs.valueAt(i);
3012            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3013                if (!deviceDistinguishesOnAddress(device)) {
3014                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3015                    outputs.add(mOutputs.keyAt(i));
3016                } else {
3017                    ALOGV("  checking address match due to device 0x%x", device);
3018                    findIoHandlesByAddress(desc, address, outputs);
3019                }
3020            }
3021        }
3022        // then look for output profiles that can be routed to this device
3023        SortedVector< sp<IOProfile> > profiles;
3024        for (size_t i = 0; i < mHwModules.size(); i++)
3025        {
3026            if (mHwModules[i]->mHandle == 0) {
3027                continue;
3028            }
3029            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3030            {
3031                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3032                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3033                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3034                }
3035            }
3036        }
3037
3038        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3039
3040        if (profiles.isEmpty() && outputs.isEmpty()) {
3041            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3042            return BAD_VALUE;
3043        }
3044
3045        // open outputs for matching profiles if needed. Direct outputs are also opened to
3046        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3047        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3048            sp<IOProfile> profile = profiles[profile_index];
3049
3050            // nothing to do if one output is already opened for this profile
3051            size_t j;
3052            for (j = 0; j < outputs.size(); j++) {
3053                desc = mOutputs.valueFor(outputs.itemAt(j));
3054                if (!desc->isDuplicated() && desc->mProfile == profile) {
3055                    break;
3056                }
3057            }
3058            if (j != outputs.size()) {
3059                continue;
3060            }
3061
3062            ALOGV("opening output for device %08x with params %s profile %p",
3063                                                      device, address.string(), profile.get());
3064            desc = new AudioOutputDescriptor(profile);
3065            desc->mDevice = device;
3066            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3067            config.sample_rate = desc->mSamplingRate;
3068            config.channel_mask = desc->mChannelMask;
3069            config.format = desc->mFormat;
3070            config.offload_info.sample_rate = desc->mSamplingRate;
3071            config.offload_info.channel_mask = desc->mChannelMask;
3072            config.offload_info.format = desc->mFormat;
3073            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3074            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3075                                                            &output,
3076                                                            &config,
3077                                                            &desc->mDevice,
3078                                                            address,
3079                                                            &desc->mLatency,
3080                                                            desc->mFlags);
3081            if (status == NO_ERROR) {
3082                desc->mSamplingRate = config.sample_rate;
3083                desc->mChannelMask = config.channel_mask;
3084                desc->mFormat = config.format;
3085
3086                // Here is where the out_set_parameters() for card & device gets called
3087                if (!address.isEmpty()) {
3088                    char *param = audio_device_address_to_parameter(device, address);
3089                    mpClientInterface->setParameters(output, String8(param));
3090                    free(param);
3091                }
3092
3093                // Here is where we step through and resolve any "dynamic" fields
3094                String8 reply;
3095                char *value;
3096                if (profile->mSamplingRates[0] == 0) {
3097                    reply = mpClientInterface->getParameters(output,
3098                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3099                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3100                              reply.string());
3101                    value = strpbrk((char *)reply.string(), "=");
3102                    if (value != NULL) {
3103                        profile->loadSamplingRates(value + 1);
3104                    }
3105                }
3106                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3107                    reply = mpClientInterface->getParameters(output,
3108                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3109                    ALOGV("checkOutputsForDevice() supported formats %s",
3110                              reply.string());
3111                    value = strpbrk((char *)reply.string(), "=");
3112                    if (value != NULL) {
3113                        profile->loadFormats(value + 1);
3114                    }
3115                }
3116                if (profile->mChannelMasks[0] == 0) {
3117                    reply = mpClientInterface->getParameters(output,
3118                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3119                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3120                              reply.string());
3121                    value = strpbrk((char *)reply.string(), "=");
3122                    if (value != NULL) {
3123                        profile->loadOutChannels(value + 1);
3124                    }
3125                }
3126                if (((profile->mSamplingRates[0] == 0) &&
3127                         (profile->mSamplingRates.size() < 2)) ||
3128                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3129                         (profile->mFormats.size() < 2)) ||
3130                     ((profile->mChannelMasks[0] == 0) &&
3131                         (profile->mChannelMasks.size() < 2))) {
3132                    ALOGW("checkOutputsForDevice() missing param");
3133                    mpClientInterface->closeOutput(output);
3134                    output = AUDIO_IO_HANDLE_NONE;
3135                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3136                            profile->mChannelMasks[0] == 0) {
3137                    mpClientInterface->closeOutput(output);
3138                    config.sample_rate = profile->pickSamplingRate();
3139                    config.channel_mask = profile->pickChannelMask();
3140                    config.format = profile->pickFormat();
3141                    config.offload_info.sample_rate = config.sample_rate;
3142                    config.offload_info.channel_mask = config.channel_mask;
3143                    config.offload_info.format = config.format;
3144                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3145                                                           &output,
3146                                                           &config,
3147                                                           &desc->mDevice,
3148                                                           address,
3149                                                           &desc->mLatency,
3150                                                           desc->mFlags);
3151                    if (status == NO_ERROR) {
3152                        desc->mSamplingRate = config.sample_rate;
3153                        desc->mChannelMask = config.channel_mask;
3154                        desc->mFormat = config.format;
3155                    } else {
3156                        output = AUDIO_IO_HANDLE_NONE;
3157                    }
3158                }
3159
3160                if (output != AUDIO_IO_HANDLE_NONE) {
3161                    addOutput(output, desc);
3162                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3163                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3164
3165                        // set initial stream volume for device
3166                        applyStreamVolumes(output, device, 0, true);
3167
3168                        //TODO: configure audio effect output stage here
3169
3170                        // open a duplicating output thread for the new output and the primary output
3171                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3172                                                                                  mPrimaryOutput);
3173                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3174                            // add duplicated output descriptor
3175                            sp<AudioOutputDescriptor> dupOutputDesc =
3176                                    new AudioOutputDescriptor(NULL);
3177                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3178                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3179                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3180                            dupOutputDesc->mFormat = desc->mFormat;
3181                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3182                            dupOutputDesc->mLatency = desc->mLatency;
3183                            addOutput(duplicatedOutput, dupOutputDesc);
3184                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3185                        } else {
3186                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3187                                    mPrimaryOutput, output);
3188                            mpClientInterface->closeOutput(output);
3189                            mOutputs.removeItem(output);
3190                            nextAudioPortGeneration();
3191                            output = AUDIO_IO_HANDLE_NONE;
3192                        }
3193                    }
3194                }
3195            } else {
3196                output = AUDIO_IO_HANDLE_NONE;
3197            }
3198            if (output == AUDIO_IO_HANDLE_NONE) {
3199                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3200                profiles.removeAt(profile_index);
3201                profile_index--;
3202            } else {
3203                outputs.add(output);
3204                if (deviceDistinguishesOnAddress(device)) {
3205                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3206                            device, address.string());
3207                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3208                            NULL/*patch handle*/, address.string());
3209                }
3210                ALOGV("checkOutputsForDevice(): adding output %d", output);
3211            }
3212        }
3213
3214        if (profiles.isEmpty()) {
3215            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3216            return BAD_VALUE;
3217        }
3218    } else { // Disconnect
3219        // check if one opened output is not needed any more after disconnecting one device
3220        for (size_t i = 0; i < mOutputs.size(); i++) {
3221            desc = mOutputs.valueAt(i);
3222            if (!desc->isDuplicated()) {
3223                if  (!(desc->mProfile->mSupportedDevices.types()
3224                        & mAvailableOutputDevices.types())) {
3225                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3226                            mOutputs.keyAt(i));
3227                    outputs.add(mOutputs.keyAt(i));
3228                } else if (deviceDistinguishesOnAddress(device) &&
3229                        // exact match on device
3230                        (desc->mProfile->mSupportedDevices.types() == device)) {
3231                    findIoHandlesByAddress(desc, address, outputs);
3232                }
3233            }
3234        }
3235        // Clear any profiles associated with the disconnected device.
3236        for (size_t i = 0; i < mHwModules.size(); i++)
3237        {
3238            if (mHwModules[i]->mHandle == 0) {
3239                continue;
3240            }
3241            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3242            {
3243                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3244                if (profile->mSupportedDevices.types() & device) {
3245                    ALOGV("checkOutputsForDevice(): "
3246                            "clearing direct output profile %zu on module %zu", j, i);
3247                    if (profile->mSamplingRates[0] == 0) {
3248                        profile->mSamplingRates.clear();
3249                        profile->mSamplingRates.add(0);
3250                    }
3251                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3252                        profile->mFormats.clear();
3253                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3254                    }
3255                    if (profile->mChannelMasks[0] == 0) {
3256                        profile->mChannelMasks.clear();
3257                        profile->mChannelMasks.add(0);
3258                    }
3259                }
3260            }
3261        }
3262    }
3263    return NO_ERROR;
3264}
3265
3266status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3267                                                      audio_policy_dev_state_t state,
3268                                                      SortedVector<audio_io_handle_t>& inputs,
3269                                                      const String8 address)
3270{
3271    sp<AudioInputDescriptor> desc;
3272    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3273        // first list already open inputs that can be routed to this device
3274        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3275            desc = mInputs.valueAt(input_index);
3276            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3277                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3278               inputs.add(mInputs.keyAt(input_index));
3279            }
3280        }
3281
3282        // then look for input profiles that can be routed to this device
3283        SortedVector< sp<IOProfile> > profiles;
3284        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3285        {
3286            if (mHwModules[module_idx]->mHandle == 0) {
3287                continue;
3288            }
3289            for (size_t profile_index = 0;
3290                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3291                 profile_index++)
3292            {
3293                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3294                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3295                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3296                          profile_index, module_idx);
3297                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3298                }
3299            }
3300        }
3301
3302        if (profiles.isEmpty() && inputs.isEmpty()) {
3303            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3304            return BAD_VALUE;
3305        }
3306
3307        // open inputs for matching profiles if needed. Direct inputs are also opened to
3308        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3309        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3310
3311            sp<IOProfile> profile = profiles[profile_index];
3312            // nothing to do if one input is already opened for this profile
3313            size_t input_index;
3314            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3315                desc = mInputs.valueAt(input_index);
3316                if (desc->mProfile == profile) {
3317                    break;
3318                }
3319            }
3320            if (input_index != mInputs.size()) {
3321                continue;
3322            }
3323
3324            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3325            desc = new AudioInputDescriptor(profile);
3326            desc->mDevice = device;
3327            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3328            config.sample_rate = desc->mSamplingRate;
3329            config.channel_mask = desc->mChannelMask;
3330            config.format = desc->mFormat;
3331            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3332            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3333                                                           &input,
3334                                                           &config,
3335                                                           &desc->mDevice,
3336                                                           address,
3337                                                           AUDIO_SOURCE_MIC,
3338                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3339
3340            if (status == NO_ERROR) {
3341                desc->mSamplingRate = config.sample_rate;
3342                desc->mChannelMask = config.channel_mask;
3343                desc->mFormat = config.format;
3344
3345                if (!address.isEmpty()) {
3346                    char *param = audio_device_address_to_parameter(device, address);
3347                    mpClientInterface->setParameters(input, String8(param));
3348                    free(param);
3349                }
3350
3351                // Here is where we step through and resolve any "dynamic" fields
3352                String8 reply;
3353                char *value;
3354                if (profile->mSamplingRates[0] == 0) {
3355                    reply = mpClientInterface->getParameters(input,
3356                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3357                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3358                              reply.string());
3359                    value = strpbrk((char *)reply.string(), "=");
3360                    if (value != NULL) {
3361                        profile->loadSamplingRates(value + 1);
3362                    }
3363                }
3364                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3365                    reply = mpClientInterface->getParameters(input,
3366                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3367                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3368                    value = strpbrk((char *)reply.string(), "=");
3369                    if (value != NULL) {
3370                        profile->loadFormats(value + 1);
3371                    }
3372                }
3373                if (profile->mChannelMasks[0] == 0) {
3374                    reply = mpClientInterface->getParameters(input,
3375                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3376                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3377                              reply.string());
3378                    value = strpbrk((char *)reply.string(), "=");
3379                    if (value != NULL) {
3380                        profile->loadInChannels(value + 1);
3381                    }
3382                }
3383                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3384                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3385                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3386                    ALOGW("checkInputsForDevice() direct input missing param");
3387                    mpClientInterface->closeInput(input);
3388                    input = AUDIO_IO_HANDLE_NONE;
3389                }
3390
3391                if (input != 0) {
3392                    addInput(input, desc);
3393                }
3394            } // endif input != 0
3395
3396            if (input == AUDIO_IO_HANDLE_NONE) {
3397                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3398                profiles.removeAt(profile_index);
3399                profile_index--;
3400            } else {
3401                inputs.add(input);
3402                ALOGV("checkInputsForDevice(): adding input %d", input);
3403            }
3404        } // end scan profiles
3405
3406        if (profiles.isEmpty()) {
3407            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3408            return BAD_VALUE;
3409        }
3410    } else {
3411        // Disconnect
3412        // check if one opened input is not needed any more after disconnecting one device
3413        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3414            desc = mInputs.valueAt(input_index);
3415            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3416                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3417                      mInputs.keyAt(input_index));
3418                inputs.add(mInputs.keyAt(input_index));
3419            }
3420        }
3421        // Clear any profiles associated with the disconnected device.
3422        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3423            if (mHwModules[module_index]->mHandle == 0) {
3424                continue;
3425            }
3426            for (size_t profile_index = 0;
3427                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3428                 profile_index++) {
3429                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3430                if (profile->mSupportedDevices.types() & device) {
3431                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3432                          profile_index, module_index);
3433                    if (profile->mSamplingRates[0] == 0) {
3434                        profile->mSamplingRates.clear();
3435                        profile->mSamplingRates.add(0);
3436                    }
3437                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3438                        profile->mFormats.clear();
3439                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3440                    }
3441                    if (profile->mChannelMasks[0] == 0) {
3442                        profile->mChannelMasks.clear();
3443                        profile->mChannelMasks.add(0);
3444                    }
3445                }
3446            }
3447        }
3448    } // end disconnect
3449
3450    return NO_ERROR;
3451}
3452
3453
3454void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3455{
3456    ALOGV("closeOutput(%d)", output);
3457
3458    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3459    if (outputDesc == NULL) {
3460        ALOGW("closeOutput() unknown output %d", output);
3461        return;
3462    }
3463
3464    // look for duplicated outputs connected to the output being removed.
3465    for (size_t i = 0; i < mOutputs.size(); i++) {
3466        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3467        if (dupOutputDesc->isDuplicated() &&
3468                (dupOutputDesc->mOutput1 == outputDesc ||
3469                dupOutputDesc->mOutput2 == outputDesc)) {
3470            sp<AudioOutputDescriptor> outputDesc2;
3471            if (dupOutputDesc->mOutput1 == outputDesc) {
3472                outputDesc2 = dupOutputDesc->mOutput2;
3473            } else {
3474                outputDesc2 = dupOutputDesc->mOutput1;
3475            }
3476            // As all active tracks on duplicated output will be deleted,
3477            // and as they were also referenced on the other output, the reference
3478            // count for their stream type must be adjusted accordingly on
3479            // the other output.
3480            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3481                int refCount = dupOutputDesc->mRefCount[j];
3482                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3483            }
3484            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3485            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3486
3487            mpClientInterface->closeOutput(duplicatedOutput);
3488            mOutputs.removeItem(duplicatedOutput);
3489        }
3490    }
3491
3492    AudioParameter param;
3493    param.add(String8("closing"), String8("true"));
3494    mpClientInterface->setParameters(output, param.toString());
3495
3496    mpClientInterface->closeOutput(output);
3497    mOutputs.removeItem(output);
3498    mPreviousOutputs = mOutputs;
3499    nextAudioPortGeneration();
3500}
3501
3502SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3503                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3504{
3505    SortedVector<audio_io_handle_t> outputs;
3506
3507    ALOGVV("getOutputsForDevice() device %04x", device);
3508    for (size_t i = 0; i < openOutputs.size(); i++) {
3509        ALOGVV("output %d isDuplicated=%d device=%04x",
3510                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3511        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3512            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3513            outputs.add(openOutputs.keyAt(i));
3514        }
3515    }
3516    return outputs;
3517}
3518
3519bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3520                                   SortedVector<audio_io_handle_t>& outputs2)
3521{
3522    if (outputs1.size() != outputs2.size()) {
3523        return false;
3524    }
3525    for (size_t i = 0; i < outputs1.size(); i++) {
3526        if (outputs1[i] != outputs2[i]) {
3527            return false;
3528        }
3529    }
3530    return true;
3531}
3532
3533void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3534{
3535    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3536    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3537    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3538    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3539
3540    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3541        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3542              strategy, srcOutputs[0], dstOutputs[0]);
3543        // mute strategy while moving tracks from one output to another
3544        for (size_t i = 0; i < srcOutputs.size(); i++) {
3545            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3546            if (desc->isStrategyActive(strategy)) {
3547                setStrategyMute(strategy, true, srcOutputs[i]);
3548                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3549            }
3550        }
3551
3552        // Move effects associated to this strategy from previous output to new output
3553        if (strategy == STRATEGY_MEDIA) {
3554            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3555            SortedVector<audio_io_handle_t> moved;
3556            for (size_t i = 0; i < mEffects.size(); i++) {
3557                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3558                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3559                        effectDesc->mIo != fxOutput) {
3560                    if (moved.indexOf(effectDesc->mIo) < 0) {
3561                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3562                              mEffects.keyAt(i), fxOutput);
3563                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3564                                                       fxOutput);
3565                        moved.add(effectDesc->mIo);
3566                    }
3567                    effectDesc->mIo = fxOutput;
3568                }
3569            }
3570        }
3571        // Move tracks associated to this strategy from previous output to new output
3572        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3573            if (getStrategy((audio_stream_type_t)i) == strategy) {
3574                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3575            }
3576        }
3577    }
3578}
3579
3580void AudioPolicyManager::checkOutputForAllStrategies()
3581{
3582    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3583    checkOutputForStrategy(STRATEGY_PHONE);
3584    checkOutputForStrategy(STRATEGY_SONIFICATION);
3585    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3586    checkOutputForStrategy(STRATEGY_MEDIA);
3587    checkOutputForStrategy(STRATEGY_DTMF);
3588}
3589
3590audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3591{
3592    for (size_t i = 0; i < mOutputs.size(); i++) {
3593        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3594        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3595            return mOutputs.keyAt(i);
3596        }
3597    }
3598
3599    return 0;
3600}
3601
3602void AudioPolicyManager::checkA2dpSuspend()
3603{
3604    audio_io_handle_t a2dpOutput = getA2dpOutput();
3605    if (a2dpOutput == 0) {
3606        mA2dpSuspended = false;
3607        return;
3608    }
3609
3610    bool isScoConnected =
3611            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3612    // suspend A2DP output if:
3613    //      (NOT already suspended) &&
3614    //      ((SCO device is connected &&
3615    //       (forced usage for communication || for record is SCO))) ||
3616    //      (phone state is ringing || in call)
3617    //
3618    // restore A2DP output if:
3619    //      (Already suspended) &&
3620    //      ((SCO device is NOT connected ||
3621    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3622    //      (phone state is NOT ringing && NOT in call)
3623    //
3624    if (mA2dpSuspended) {
3625        if ((!isScoConnected ||
3626             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3627              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3628             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3629              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3630
3631            mpClientInterface->restoreOutput(a2dpOutput);
3632            mA2dpSuspended = false;
3633        }
3634    } else {
3635        if ((isScoConnected &&
3636             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3637              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3638             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3639              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3640
3641            mpClientInterface->suspendOutput(a2dpOutput);
3642            mA2dpSuspended = true;
3643        }
3644    }
3645}
3646
3647audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3648{
3649    audio_devices_t device = AUDIO_DEVICE_NONE;
3650
3651    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3652
3653    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3654    if (index >= 0) {
3655        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3656        if (patchDesc->mUid != mUidCached) {
3657            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3658                  outputDesc->device(), outputDesc->mPatchHandle);
3659            return outputDesc->device();
3660        }
3661    }
3662
3663    // check the following by order of priority to request a routing change if necessary:
3664    // 1: the strategy enforced audible is active on the output:
3665    //      use device for strategy enforced audible
3666    // 2: we are in call or the strategy phone is active on the output:
3667    //      use device for strategy phone
3668    // 3: the strategy sonification is active on the output:
3669    //      use device for strategy sonification
3670    // 4: the strategy "respectful" sonification is active on the output:
3671    //      use device for strategy "respectful" sonification
3672    // 5: the strategy media is active on the output:
3673    //      use device for strategy media
3674    // 6: the strategy DTMF is active on the output:
3675    //      use device for strategy DTMF
3676    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3677        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3678    } else if (isInCall() ||
3679                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3680        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3681    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3682        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3683    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3684        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3685    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3686        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3687    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3688        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3689    }
3690
3691    ALOGV("getNewOutputDevice() selected device %x", device);
3692    return device;
3693}
3694
3695audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3696{
3697    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3698
3699    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3700    if (index >= 0) {
3701        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3702        if (patchDesc->mUid != mUidCached) {
3703            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3704                  inputDesc->mDevice, inputDesc->mPatchHandle);
3705            return inputDesc->mDevice;
3706        }
3707    }
3708
3709    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3710
3711    ALOGV("getNewInputDevice() selected device %x", device);
3712    return device;
3713}
3714
3715uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3716    return (uint32_t)getStrategy(stream);
3717}
3718
3719audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3720    // By checking the range of stream before calling getStrategy, we avoid
3721    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3722    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3723    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3724        return AUDIO_DEVICE_NONE;
3725    }
3726    audio_devices_t devices;
3727    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3728    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3729    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3730    for (size_t i = 0; i < outputs.size(); i++) {
3731        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3732        if (outputDesc->isStrategyActive(strategy)) {
3733            devices = outputDesc->device();
3734            break;
3735        }
3736    }
3737    return devices;
3738}
3739
3740AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3741        audio_stream_type_t stream) {
3742    // stream to strategy mapping
3743    switch (stream) {
3744    case AUDIO_STREAM_VOICE_CALL:
3745    case AUDIO_STREAM_BLUETOOTH_SCO:
3746        return STRATEGY_PHONE;
3747    case AUDIO_STREAM_RING:
3748    case AUDIO_STREAM_ALARM:
3749        return STRATEGY_SONIFICATION;
3750    case AUDIO_STREAM_NOTIFICATION:
3751        return STRATEGY_SONIFICATION_RESPECTFUL;
3752    case AUDIO_STREAM_DTMF:
3753        return STRATEGY_DTMF;
3754    default:
3755        ALOGE("unknown stream type");
3756    case AUDIO_STREAM_SYSTEM:
3757        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3758        // while key clicks are played produces a poor result
3759    case AUDIO_STREAM_TTS:
3760    case AUDIO_STREAM_MUSIC:
3761        return STRATEGY_MEDIA;
3762    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3763        return STRATEGY_ENFORCED_AUDIBLE;
3764    }
3765}
3766
3767uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3768    // flags to strategy mapping
3769    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3770        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3771    }
3772
3773    // usage to strategy mapping
3774    switch (attr->usage) {
3775    case AUDIO_USAGE_MEDIA:
3776    case AUDIO_USAGE_GAME:
3777    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3778    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3779    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3780        return (uint32_t) STRATEGY_MEDIA;
3781
3782    case AUDIO_USAGE_VOICE_COMMUNICATION:
3783        return (uint32_t) STRATEGY_PHONE;
3784
3785    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3786        return (uint32_t) STRATEGY_DTMF;
3787
3788    case AUDIO_USAGE_ALARM:
3789    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3790        return (uint32_t) STRATEGY_SONIFICATION;
3791
3792    case AUDIO_USAGE_NOTIFICATION:
3793    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3794    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3795    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3796    case AUDIO_USAGE_NOTIFICATION_EVENT:
3797        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3798
3799    case AUDIO_USAGE_UNKNOWN:
3800    default:
3801        return (uint32_t) STRATEGY_MEDIA;
3802    }
3803}
3804
3805void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3806    switch(stream) {
3807    case AUDIO_STREAM_MUSIC:
3808        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3809        updateDevicesAndOutputs();
3810        break;
3811    default:
3812        break;
3813    }
3814}
3815
3816audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3817                                                             bool fromCache)
3818{
3819    uint32_t device = AUDIO_DEVICE_NONE;
3820
3821    if (fromCache) {
3822        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3823              strategy, mDeviceForStrategy[strategy]);
3824        return mDeviceForStrategy[strategy];
3825    }
3826    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3827    switch (strategy) {
3828
3829    case STRATEGY_SONIFICATION_RESPECTFUL:
3830        if (isInCall()) {
3831            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3832        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3833                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3834            // while media is playing on a remote device, use the the sonification behavior.
3835            // Note that we test this usecase before testing if media is playing because
3836            //   the isStreamActive() method only informs about the activity of a stream, not
3837            //   if it's for local playback. Note also that we use the same delay between both tests
3838            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3839        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3840            // while media is playing (or has recently played), use the same device
3841            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3842        } else {
3843            // when media is not playing anymore, fall back on the sonification behavior
3844            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3845        }
3846
3847        break;
3848
3849    case STRATEGY_DTMF:
3850        if (!isInCall()) {
3851            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3852            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3853            break;
3854        }
3855        // when in call, DTMF and PHONE strategies follow the same rules
3856        // FALL THROUGH
3857
3858    case STRATEGY_PHONE:
3859        // Force use of only devices on primary output if:
3860        // - in call AND
3861        //   - cannot route from voice call RX OR
3862        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
3863        if (mPhoneState == AUDIO_MODE_IN_CALL) {
3864            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
3865            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
3866            if (((mAvailableInputDevices.types() &
3867                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
3868                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
3869                         (hwOutputDesc->mAudioPort->mModule->mHalVersion <
3870                             AUDIO_DEVICE_API_VERSION_3_0))) {
3871                availableOutputDeviceTypes = availablePrimaryOutputDevices();
3872            }
3873        }
3874        // for phone strategy, we first consider the forced use and then the available devices by order
3875        // of priority
3876        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3877        case AUDIO_POLICY_FORCE_BT_SCO:
3878            if (!isInCall() || strategy != STRATEGY_DTMF) {
3879                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3880                if (device) break;
3881            }
3882            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3883            if (device) break;
3884            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3885            if (device) break;
3886            // if SCO device is requested but no SCO device is available, fall back to default case
3887            // FALL THROUGH
3888
3889        default:    // FORCE_NONE
3890            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3891            if (!isInCall() &&
3892                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3893                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3894                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3895                if (device) break;
3896                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3897                if (device) break;
3898            }
3899            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3900            if (device) break;
3901            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3902            if (device) break;
3903            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3904            if (device) break;
3905            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3906                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3907                if (device) break;
3908                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3909                if (device) break;
3910                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3911                if (device) break;
3912                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3913                if (device) break;
3914            }
3915            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3916            if (device) break;
3917            device = mDefaultOutputDevice->mDeviceType;
3918            if (device == AUDIO_DEVICE_NONE) {
3919                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3920            }
3921            break;
3922
3923        case AUDIO_POLICY_FORCE_SPEAKER:
3924            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3925            // A2DP speaker when forcing to speaker output
3926            if (!isInCall() &&
3927                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3928                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3929                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3930                if (device) break;
3931            }
3932            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3933                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3934                if (device) break;
3935                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3936                if (device) break;
3937                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3938                if (device) break;
3939                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3940                if (device) break;
3941                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3942                if (device) break;
3943            }
3944            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
3945            if (device) break;
3946            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3947            if (device) break;
3948            device = mDefaultOutputDevice->mDeviceType;
3949            if (device == AUDIO_DEVICE_NONE) {
3950                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
3951            }
3952            break;
3953        }
3954    break;
3955
3956    case STRATEGY_SONIFICATION:
3957
3958        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
3959        // handleIncallSonification().
3960        if (isInCall()) {
3961            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
3962            break;
3963        }
3964        // FALL THROUGH
3965
3966    case STRATEGY_ENFORCED_AUDIBLE:
3967        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
3968        // except:
3969        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
3970        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
3971
3972        if ((strategy == STRATEGY_SONIFICATION) ||
3973                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
3974            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3975            if (device == AUDIO_DEVICE_NONE) {
3976                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
3977            }
3978        }
3979        // The second device used for sonification is the same as the device used by media strategy
3980        // FALL THROUGH
3981
3982    case STRATEGY_MEDIA: {
3983        uint32_t device2 = AUDIO_DEVICE_NONE;
3984        if (strategy != STRATEGY_SONIFICATION) {
3985            // no sonification on remote submix (e.g. WFD)
3986            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
3987        }
3988        if ((device2 == AUDIO_DEVICE_NONE) &&
3989                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3990                (getA2dpOutput() != 0) && !mA2dpSuspended) {
3991            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3992            if (device2 == AUDIO_DEVICE_NONE) {
3993                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3994            }
3995            if (device2 == AUDIO_DEVICE_NONE) {
3996                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3997            }
3998        }
3999        if (device2 == AUDIO_DEVICE_NONE) {
4000            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4001        }
4002        if ((device2 == AUDIO_DEVICE_NONE)) {
4003            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4004        }
4005        if (device2 == AUDIO_DEVICE_NONE) {
4006            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4007        }
4008        if (device2 == AUDIO_DEVICE_NONE) {
4009            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4010        }
4011        if (device2 == AUDIO_DEVICE_NONE) {
4012            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4013        }
4014        if (device2 == AUDIO_DEVICE_NONE) {
4015            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4016        }
4017        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4018            // no sonification on aux digital (e.g. HDMI)
4019            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4020        }
4021        if ((device2 == AUDIO_DEVICE_NONE) &&
4022                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4023            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4024        }
4025        if (device2 == AUDIO_DEVICE_NONE) {
4026            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4027        }
4028        int device3 = AUDIO_DEVICE_NONE;
4029        if (strategy == STRATEGY_MEDIA) {
4030            // ARC, SPDIF and AUX_LINE can co-exist with others.
4031            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4032            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4033            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4034        }
4035
4036        device2 |= device3;
4037        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4038        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4039        device |= device2;
4040
4041        // If hdmi system audio mode is on, remove speaker out of output list.
4042        if ((strategy == STRATEGY_MEDIA) &&
4043            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4044                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4045            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4046        }
4047
4048        if (device) break;
4049        device = mDefaultOutputDevice->mDeviceType;
4050        if (device == AUDIO_DEVICE_NONE) {
4051            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4052        }
4053        } break;
4054
4055    default:
4056        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4057        break;
4058    }
4059
4060    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4061    return device;
4062}
4063
4064void AudioPolicyManager::updateDevicesAndOutputs()
4065{
4066    for (int i = 0; i < NUM_STRATEGIES; i++) {
4067        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4068    }
4069    mPreviousOutputs = mOutputs;
4070}
4071
4072uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4073                                                       audio_devices_t prevDevice,
4074                                                       uint32_t delayMs)
4075{
4076    // mute/unmute strategies using an incompatible device combination
4077    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4078    // if unmuting, unmute only after the specified delay
4079    if (outputDesc->isDuplicated()) {
4080        return 0;
4081    }
4082
4083    uint32_t muteWaitMs = 0;
4084    audio_devices_t device = outputDesc->device();
4085    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4086
4087    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4088        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4089        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4090        bool doMute = false;
4091
4092        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4093            doMute = true;
4094            outputDesc->mStrategyMutedByDevice[i] = true;
4095        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4096            doMute = true;
4097            outputDesc->mStrategyMutedByDevice[i] = false;
4098        }
4099        if (doMute) {
4100            for (size_t j = 0; j < mOutputs.size(); j++) {
4101                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4102                // skip output if it does not share any device with current output
4103                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4104                        == AUDIO_DEVICE_NONE) {
4105                    continue;
4106                }
4107                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4108                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4109                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4110                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4111                if (desc->isStrategyActive((routing_strategy)i)) {
4112                    if (mute) {
4113                        // FIXME: should not need to double latency if volume could be applied
4114                        // immediately by the audioflinger mixer. We must account for the delay
4115                        // between now and the next time the audioflinger thread for this output
4116                        // will process a buffer (which corresponds to one buffer size,
4117                        // usually 1/2 or 1/4 of the latency).
4118                        if (muteWaitMs < desc->latency() * 2) {
4119                            muteWaitMs = desc->latency() * 2;
4120                        }
4121                    }
4122                }
4123            }
4124        }
4125    }
4126
4127    // temporary mute output if device selection changes to avoid volume bursts due to
4128    // different per device volumes
4129    if (outputDesc->isActive() && (device != prevDevice)) {
4130        if (muteWaitMs < outputDesc->latency() * 2) {
4131            muteWaitMs = outputDesc->latency() * 2;
4132        }
4133        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4134            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4135                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4136                // do tempMute unmute after twice the mute wait time
4137                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4138                                muteWaitMs *2, device);
4139            }
4140        }
4141    }
4142
4143    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4144    if (muteWaitMs > delayMs) {
4145        muteWaitMs -= delayMs;
4146        usleep(muteWaitMs * 1000);
4147        return muteWaitMs;
4148    }
4149    return 0;
4150}
4151
4152uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4153                                             audio_devices_t device,
4154                                             bool force,
4155                                             int delayMs,
4156                                             audio_patch_handle_t *patchHandle,
4157                                             const char* address)
4158{
4159    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4160    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4161    AudioParameter param;
4162    uint32_t muteWaitMs;
4163
4164    if (outputDesc->isDuplicated()) {
4165        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4166        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4167        return muteWaitMs;
4168    }
4169    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4170    // output profile
4171    if ((device != AUDIO_DEVICE_NONE) &&
4172            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4173        return 0;
4174    }
4175
4176    // filter devices according to output selected
4177    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4178
4179    audio_devices_t prevDevice = outputDesc->mDevice;
4180
4181    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4182
4183    if (device != AUDIO_DEVICE_NONE) {
4184        outputDesc->mDevice = device;
4185    }
4186    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4187
4188    // Do not change the routing if:
4189    //  - the requested device is AUDIO_DEVICE_NONE
4190    //  - the requested device is the same as current device and force is not specified.
4191    // Doing this check here allows the caller to call setOutputDevice() without conditions
4192    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
4193        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
4194        return muteWaitMs;
4195    }
4196
4197    ALOGV("setOutputDevice() changing device");
4198
4199    // do the routing
4200    if (device == AUDIO_DEVICE_NONE) {
4201        resetOutputDevice(output, delayMs, NULL);
4202    } else {
4203        DeviceVector deviceList = (address == NULL) ?
4204                mAvailableOutputDevices.getDevicesFromType(device)
4205                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4206        if (!deviceList.isEmpty()) {
4207            struct audio_patch patch;
4208            outputDesc->toAudioPortConfig(&patch.sources[0]);
4209            patch.num_sources = 1;
4210            patch.num_sinks = 0;
4211            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4212                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4213                patch.num_sinks++;
4214            }
4215            ssize_t index;
4216            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4217                index = mAudioPatches.indexOfKey(*patchHandle);
4218            } else {
4219                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4220            }
4221            sp< AudioPatch> patchDesc;
4222            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4223            if (index >= 0) {
4224                patchDesc = mAudioPatches.valueAt(index);
4225                afPatchHandle = patchDesc->mAfPatchHandle;
4226            }
4227
4228            status_t status = mpClientInterface->createAudioPatch(&patch,
4229                                                                   &afPatchHandle,
4230                                                                   delayMs);
4231            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4232                    "num_sources %d num_sinks %d",
4233                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4234            if (status == NO_ERROR) {
4235                if (index < 0) {
4236                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4237                                               &patch, mUidCached);
4238                    addAudioPatch(patchDesc->mHandle, patchDesc);
4239                } else {
4240                    patchDesc->mPatch = patch;
4241                }
4242                patchDesc->mAfPatchHandle = afPatchHandle;
4243                patchDesc->mUid = mUidCached;
4244                if (patchHandle) {
4245                    *patchHandle = patchDesc->mHandle;
4246                }
4247                outputDesc->mPatchHandle = patchDesc->mHandle;
4248                nextAudioPortGeneration();
4249                mpClientInterface->onAudioPatchListUpdate();
4250            }
4251        }
4252    }
4253
4254    // update stream volumes according to new device
4255    applyStreamVolumes(output, device, delayMs);
4256
4257    return muteWaitMs;
4258}
4259
4260status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4261                                               int delayMs,
4262                                               audio_patch_handle_t *patchHandle)
4263{
4264    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4265    ssize_t index;
4266    if (patchHandle) {
4267        index = mAudioPatches.indexOfKey(*patchHandle);
4268    } else {
4269        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4270    }
4271    if (index < 0) {
4272        return INVALID_OPERATION;
4273    }
4274    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4275    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4276    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4277    outputDesc->mPatchHandle = 0;
4278    removeAudioPatch(patchDesc->mHandle);
4279    nextAudioPortGeneration();
4280    mpClientInterface->onAudioPatchListUpdate();
4281    return status;
4282}
4283
4284status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4285                                            audio_devices_t device,
4286                                            bool force,
4287                                            audio_patch_handle_t *patchHandle)
4288{
4289    status_t status = NO_ERROR;
4290
4291    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4292    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4293        inputDesc->mDevice = device;
4294
4295        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4296        if (!deviceList.isEmpty()) {
4297            struct audio_patch patch;
4298            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4299            // AUDIO_SOURCE_HOTWORD is for internal use only:
4300            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4301            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4302                    !inputDesc->mIsSoundTrigger) {
4303                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4304            }
4305            patch.num_sinks = 1;
4306            //only one input device for now
4307            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4308            patch.num_sources = 1;
4309            ssize_t index;
4310            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4311                index = mAudioPatches.indexOfKey(*patchHandle);
4312            } else {
4313                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4314            }
4315            sp< AudioPatch> patchDesc;
4316            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4317            if (index >= 0) {
4318                patchDesc = mAudioPatches.valueAt(index);
4319                afPatchHandle = patchDesc->mAfPatchHandle;
4320            }
4321
4322            status_t status = mpClientInterface->createAudioPatch(&patch,
4323                                                                  &afPatchHandle,
4324                                                                  0);
4325            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4326                                                                          status, afPatchHandle);
4327            if (status == NO_ERROR) {
4328                if (index < 0) {
4329                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4330                                               &patch, mUidCached);
4331                    addAudioPatch(patchDesc->mHandle, patchDesc);
4332                } else {
4333                    patchDesc->mPatch = patch;
4334                }
4335                patchDesc->mAfPatchHandle = afPatchHandle;
4336                patchDesc->mUid = mUidCached;
4337                if (patchHandle) {
4338                    *patchHandle = patchDesc->mHandle;
4339                }
4340                inputDesc->mPatchHandle = patchDesc->mHandle;
4341                nextAudioPortGeneration();
4342                mpClientInterface->onAudioPatchListUpdate();
4343            }
4344        }
4345    }
4346    return status;
4347}
4348
4349status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4350                                              audio_patch_handle_t *patchHandle)
4351{
4352    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4353    ssize_t index;
4354    if (patchHandle) {
4355        index = mAudioPatches.indexOfKey(*patchHandle);
4356    } else {
4357        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4358    }
4359    if (index < 0) {
4360        return INVALID_OPERATION;
4361    }
4362    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4363    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4364    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4365    inputDesc->mPatchHandle = 0;
4366    removeAudioPatch(patchDesc->mHandle);
4367    nextAudioPortGeneration();
4368    mpClientInterface->onAudioPatchListUpdate();
4369    return status;
4370}
4371
4372sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4373                                                   uint32_t& samplingRate,
4374                                                   audio_format_t format,
4375                                                   audio_channel_mask_t channelMask,
4376                                                   audio_input_flags_t flags)
4377{
4378    // Choose an input profile based on the requested capture parameters: select the first available
4379    // profile supporting all requested parameters.
4380
4381    for (size_t i = 0; i < mHwModules.size(); i++)
4382    {
4383        if (mHwModules[i]->mHandle == 0) {
4384            continue;
4385        }
4386        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4387        {
4388            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4389            // profile->log();
4390            if (profile->isCompatibleProfile(device, samplingRate,
4391                                             &samplingRate /*updatedSamplingRate*/,
4392                                             format, channelMask, (audio_output_flags_t) flags)) {
4393                return profile;
4394            }
4395        }
4396    }
4397    return NULL;
4398}
4399
4400audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4401{
4402    uint32_t device = AUDIO_DEVICE_NONE;
4403    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4404                                            ~AUDIO_DEVICE_BIT_IN;
4405    switch (inputSource) {
4406    case AUDIO_SOURCE_VOICE_UPLINK:
4407      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4408          device = AUDIO_DEVICE_IN_VOICE_CALL;
4409          break;
4410      }
4411      break;
4412
4413    case AUDIO_SOURCE_DEFAULT:
4414    case AUDIO_SOURCE_MIC:
4415    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4416        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4417    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4418        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4419    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4420        device = AUDIO_DEVICE_IN_USB_DEVICE;
4421    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4422        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4423    }
4424    break;
4425
4426    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4427        // Allow only use of devices on primary input if in call and HAL does not support routing
4428        // to voice call path.
4429        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4430                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4431            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4432        }
4433
4434        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4435        case AUDIO_POLICY_FORCE_BT_SCO:
4436            // if SCO device is requested but no SCO device is available, fall back to default case
4437            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4438                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4439                break;
4440            }
4441            // FALL THROUGH
4442
4443        default:    // FORCE_NONE
4444            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4445                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4446            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4447                device = AUDIO_DEVICE_IN_USB_DEVICE;
4448            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4449                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4450            }
4451            break;
4452
4453        case AUDIO_POLICY_FORCE_SPEAKER:
4454            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4455                device = AUDIO_DEVICE_IN_BACK_MIC;
4456            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4457                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4458            }
4459            break;
4460        }
4461        break;
4462
4463    case AUDIO_SOURCE_VOICE_RECOGNITION:
4464    case AUDIO_SOURCE_HOTWORD:
4465        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4466                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4467            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4468        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4469            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4470        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4471            device = AUDIO_DEVICE_IN_USB_DEVICE;
4472        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4473            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4474        }
4475        break;
4476    case AUDIO_SOURCE_CAMCORDER:
4477        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4478            device = AUDIO_DEVICE_IN_BACK_MIC;
4479        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4480            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4481        }
4482        break;
4483    case AUDIO_SOURCE_VOICE_DOWNLINK:
4484    case AUDIO_SOURCE_VOICE_CALL:
4485        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4486            device = AUDIO_DEVICE_IN_VOICE_CALL;
4487        }
4488        break;
4489    case AUDIO_SOURCE_REMOTE_SUBMIX:
4490        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4491            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4492        }
4493        break;
4494    default:
4495        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4496        break;
4497    }
4498    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4499    return device;
4500}
4501
4502bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4503{
4504    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4505        device &= ~AUDIO_DEVICE_BIT_IN;
4506        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4507            return true;
4508    }
4509    return false;
4510}
4511
4512bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4513    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4514}
4515
4516audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4517{
4518    for (size_t i = 0; i < mInputs.size(); i++) {
4519        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4520        if ((input_descriptor->mRefCount > 0)
4521                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4522            return mInputs.keyAt(i);
4523        }
4524    }
4525    return 0;
4526}
4527
4528uint32_t AudioPolicyManager::activeInputsCount() const
4529{
4530    uint32_t count = 0;
4531    for (size_t i = 0; i < mInputs.size(); i++) {
4532        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4533        if (desc->mRefCount > 0) {
4534            return count++;
4535        }
4536    }
4537    return count;
4538}
4539
4540
4541audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4542{
4543    if (device == AUDIO_DEVICE_NONE) {
4544        // this happens when forcing a route update and no track is active on an output.
4545        // In this case the returned category is not important.
4546        device =  AUDIO_DEVICE_OUT_SPEAKER;
4547    } else if (popcount(device) > 1) {
4548        // Multiple device selection is either:
4549        //  - speaker + one other device: give priority to speaker in this case.
4550        //  - one A2DP device + another device: happens with duplicated output. In this case
4551        // retain the device on the A2DP output as the other must not correspond to an active
4552        // selection if not the speaker.
4553        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4554            device = AUDIO_DEVICE_OUT_SPEAKER;
4555        } else {
4556            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4557        }
4558    }
4559
4560    ALOGW_IF(popcount(device) != 1,
4561            "getDeviceForVolume() invalid device combination: %08x",
4562            device);
4563
4564    return device;
4565}
4566
4567AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4568{
4569    switch(getDeviceForVolume(device)) {
4570        case AUDIO_DEVICE_OUT_EARPIECE:
4571            return DEVICE_CATEGORY_EARPIECE;
4572        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4573        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4574        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4575        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4576        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4577        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4578            return DEVICE_CATEGORY_HEADSET;
4579        case AUDIO_DEVICE_OUT_LINE:
4580        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4581        /*USB?  Remote submix?*/
4582            return DEVICE_CATEGORY_EXT_MEDIA;
4583        case AUDIO_DEVICE_OUT_SPEAKER:
4584        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4585        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4586        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4587        case AUDIO_DEVICE_OUT_USB_DEVICE:
4588        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4589        default:
4590            return DEVICE_CATEGORY_SPEAKER;
4591    }
4592}
4593
4594float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4595        int indexInUi)
4596{
4597    device_category deviceCategory = getDeviceCategory(device);
4598    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4599
4600    // the volume index in the UI is relative to the min and max volume indices for this stream type
4601    int nbSteps = 1 + curve[VOLMAX].mIndex -
4602            curve[VOLMIN].mIndex;
4603    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4604            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4605
4606    // find what part of the curve this index volume belongs to, or if it's out of bounds
4607    int segment = 0;
4608    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4609        return 0.0f;
4610    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4611        segment = 0;
4612    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4613        segment = 1;
4614    } else if (volIdx <= curve[VOLMAX].mIndex) {
4615        segment = 2;
4616    } else {                                                               // out of bounds
4617        return 1.0f;
4618    }
4619
4620    // linear interpolation in the attenuation table in dB
4621    float decibels = curve[segment].mDBAttenuation +
4622            ((float)(volIdx - curve[segment].mIndex)) *
4623                ( (curve[segment+1].mDBAttenuation -
4624                        curve[segment].mDBAttenuation) /
4625                    ((float)(curve[segment+1].mIndex -
4626                            curve[segment].mIndex)) );
4627
4628    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4629
4630    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4631            curve[segment].mIndex, volIdx,
4632            curve[segment+1].mIndex,
4633            curve[segment].mDBAttenuation,
4634            decibels,
4635            curve[segment+1].mDBAttenuation,
4636            amplification);
4637
4638    return amplification;
4639}
4640
4641const AudioPolicyManager::VolumeCurvePoint
4642    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4643    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4644};
4645
4646const AudioPolicyManager::VolumeCurvePoint
4647    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4648    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4649};
4650
4651const AudioPolicyManager::VolumeCurvePoint
4652    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4653    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
4654};
4655
4656const AudioPolicyManager::VolumeCurvePoint
4657    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4658    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4659};
4660
4661const AudioPolicyManager::VolumeCurvePoint
4662    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4663    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4664};
4665
4666const AudioPolicyManager::VolumeCurvePoint
4667    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4668    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4669};
4670
4671const AudioPolicyManager::VolumeCurvePoint
4672    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4673    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4674};
4675
4676// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4677// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4678// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4679// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4680
4681const AudioPolicyManager::VolumeCurvePoint
4682    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4683    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4684};
4685
4686const AudioPolicyManager::VolumeCurvePoint
4687    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4688    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4689};
4690
4691const AudioPolicyManager::VolumeCurvePoint
4692    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4693    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4694};
4695
4696const AudioPolicyManager::VolumeCurvePoint
4697    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4698    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4699};
4700
4701const AudioPolicyManager::VolumeCurvePoint
4702    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4703    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4704};
4705
4706const AudioPolicyManager::VolumeCurvePoint
4707            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4708                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4709    { // AUDIO_STREAM_VOICE_CALL
4710        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4711        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4712        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4713        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4714    },
4715    { // AUDIO_STREAM_SYSTEM
4716        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4717        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4718        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4719        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4720    },
4721    { // AUDIO_STREAM_RING
4722        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4723        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4724        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4725        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4726    },
4727    { // AUDIO_STREAM_MUSIC
4728        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4729        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4730        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4731        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4732    },
4733    { // AUDIO_STREAM_ALARM
4734        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4735        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4736        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4737        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4738    },
4739    { // AUDIO_STREAM_NOTIFICATION
4740        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4741        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4742        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
4743        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4744    },
4745    { // AUDIO_STREAM_BLUETOOTH_SCO
4746        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4747        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4748        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4749        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4750    },
4751    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4752        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4753        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4754        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4755        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4756    },
4757    {  // AUDIO_STREAM_DTMF
4758        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4759        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4760        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4761        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4762    },
4763    { // AUDIO_STREAM_TTS
4764        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4765        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4766        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
4767        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
4768    },
4769};
4770
4771void AudioPolicyManager::initializeVolumeCurves()
4772{
4773    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4774        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4775            mStreams[i].mVolumeCurve[j] =
4776                    sVolumeProfiles[i][j];
4777        }
4778    }
4779
4780    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4781    if (mSpeakerDrcEnabled) {
4782        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4783                sDefaultSystemVolumeCurveDrc;
4784        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4785                sSpeakerSonificationVolumeCurveDrc;
4786        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4787                sSpeakerSonificationVolumeCurveDrc;
4788        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4789                sSpeakerSonificationVolumeCurveDrc;
4790        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4791                sSpeakerMediaVolumeCurveDrc;
4792    }
4793}
4794
4795float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4796                                            int index,
4797                                            audio_io_handle_t output,
4798                                            audio_devices_t device)
4799{
4800    float volume = 1.0;
4801    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4802    StreamDescriptor &streamDesc = mStreams[stream];
4803
4804    if (device == AUDIO_DEVICE_NONE) {
4805        device = outputDesc->device();
4806    }
4807
4808    volume = volIndexToAmpl(device, streamDesc, index);
4809
4810    // if a headset is connected, apply the following rules to ring tones and notifications
4811    // to avoid sound level bursts in user's ears:
4812    // - always attenuate ring tones and notifications volume by 6dB
4813    // - if music is playing, always limit the volume to current music volume,
4814    // with a minimum threshold at -36dB so that notification is always perceived.
4815    const routing_strategy stream_strategy = getStrategy(stream);
4816    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4817            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4818            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4819            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4820        ((stream_strategy == STRATEGY_SONIFICATION)
4821                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4822                || (stream == AUDIO_STREAM_SYSTEM)
4823                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4824                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4825        streamDesc.mCanBeMuted) {
4826        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4827        // when the phone is ringing we must consider that music could have been paused just before
4828        // by the music application and behave as if music was active if the last music track was
4829        // just stopped
4830        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4831                mLimitRingtoneVolume) {
4832            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4833            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4834                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4835                               output,
4836                               musicDevice);
4837            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4838                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4839            if (volume > minVol) {
4840                volume = minVol;
4841                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4842            }
4843        }
4844    }
4845
4846    return volume;
4847}
4848
4849status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4850                                                   int index,
4851                                                   audio_io_handle_t output,
4852                                                   audio_devices_t device,
4853                                                   int delayMs,
4854                                                   bool force)
4855{
4856
4857    // do not change actual stream volume if the stream is muted
4858    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4859        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4860              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4861        return NO_ERROR;
4862    }
4863
4864    // do not change in call volume if bluetooth is connected and vice versa
4865    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4866            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4867        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4868                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4869        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4870             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4871        return INVALID_OPERATION;
4872    }
4873
4874    float volume = computeVolume(stream, index, output, device);
4875    // We actually change the volume if:
4876    // - the float value returned by computeVolume() changed
4877    // - the force flag is set
4878    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4879            force) {
4880        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4881        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4882        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4883        // enabled
4884        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4885            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4886        }
4887        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4888    }
4889
4890    if (stream == AUDIO_STREAM_VOICE_CALL ||
4891        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4892        float voiceVolume;
4893        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4894        if (stream == AUDIO_STREAM_VOICE_CALL) {
4895            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4896        } else {
4897            voiceVolume = 1.0;
4898        }
4899
4900        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4901            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4902            mLastVoiceVolume = voiceVolume;
4903        }
4904    }
4905
4906    return NO_ERROR;
4907}
4908
4909void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4910                                                audio_devices_t device,
4911                                                int delayMs,
4912                                                bool force)
4913{
4914    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4915
4916    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4917        checkAndSetVolume((audio_stream_type_t)stream,
4918                          mStreams[stream].getVolumeIndex(device),
4919                          output,
4920                          device,
4921                          delayMs,
4922                          force);
4923    }
4924}
4925
4926void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4927                                             bool on,
4928                                             audio_io_handle_t output,
4929                                             int delayMs,
4930                                             audio_devices_t device)
4931{
4932    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
4933    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4934        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4935            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
4936        }
4937    }
4938}
4939
4940void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4941                                           bool on,
4942                                           audio_io_handle_t output,
4943                                           int delayMs,
4944                                           audio_devices_t device)
4945{
4946    StreamDescriptor &streamDesc = mStreams[stream];
4947    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4948    if (device == AUDIO_DEVICE_NONE) {
4949        device = outputDesc->device();
4950    }
4951
4952    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
4953          stream, on, output, outputDesc->mMuteCount[stream], device);
4954
4955    if (on) {
4956        if (outputDesc->mMuteCount[stream] == 0) {
4957            if (streamDesc.mCanBeMuted &&
4958                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4959                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
4960                checkAndSetVolume(stream, 0, output, device, delayMs);
4961            }
4962        }
4963        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
4964        outputDesc->mMuteCount[stream]++;
4965    } else {
4966        if (outputDesc->mMuteCount[stream] == 0) {
4967            ALOGV("setStreamMute() unmuting non muted stream!");
4968            return;
4969        }
4970        if (--outputDesc->mMuteCount[stream] == 0) {
4971            checkAndSetVolume(stream,
4972                              streamDesc.getVolumeIndex(device),
4973                              output,
4974                              device,
4975                              delayMs);
4976        }
4977    }
4978}
4979
4980void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
4981                                                      bool starting, bool stateChange)
4982{
4983    // if the stream pertains to sonification strategy and we are in call we must
4984    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
4985    // in the device used for phone strategy and play the tone if the selected device does not
4986    // interfere with the device used for phone strategy
4987    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
4988    // many times as there are active tracks on the output
4989    const routing_strategy stream_strategy = getStrategy(stream);
4990    if ((stream_strategy == STRATEGY_SONIFICATION) ||
4991            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
4992        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
4993        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
4994                stream, starting, outputDesc->mDevice, stateChange);
4995        if (outputDesc->mRefCount[stream]) {
4996            int muteCount = 1;
4997            if (stateChange) {
4998                muteCount = outputDesc->mRefCount[stream];
4999            }
5000            if (audio_is_low_visibility(stream)) {
5001                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5002                for (int i = 0; i < muteCount; i++) {
5003                    setStreamMute(stream, starting, mPrimaryOutput);
5004                }
5005            } else {
5006                ALOGV("handleIncallSonification() high visibility");
5007                if (outputDesc->device() &
5008                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5009                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5010                    for (int i = 0; i < muteCount; i++) {
5011                        setStreamMute(stream, starting, mPrimaryOutput);
5012                    }
5013                }
5014                if (starting) {
5015                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5016                                                 AUDIO_STREAM_VOICE_CALL);
5017                } else {
5018                    mpClientInterface->stopTone();
5019                }
5020            }
5021        }
5022    }
5023}
5024
5025bool AudioPolicyManager::isInCall()
5026{
5027    return isStateInCall(mPhoneState);
5028}
5029
5030bool AudioPolicyManager::isStateInCall(int state) {
5031    return ((state == AUDIO_MODE_IN_CALL) ||
5032            (state == AUDIO_MODE_IN_COMMUNICATION));
5033}
5034
5035uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5036{
5037    return MAX_EFFECTS_CPU_LOAD;
5038}
5039
5040uint32_t AudioPolicyManager::getMaxEffectsMemory()
5041{
5042    return MAX_EFFECTS_MEMORY;
5043}
5044
5045
5046// --- AudioOutputDescriptor class implementation
5047
5048AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5049        const sp<IOProfile>& profile)
5050    : mId(0), mIoHandle(0), mLatency(0),
5051    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5052    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5053{
5054    // clear usage count for all stream types
5055    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5056        mRefCount[i] = 0;
5057        mCurVolume[i] = -1.0;
5058        mMuteCount[i] = 0;
5059        mStopTime[i] = 0;
5060    }
5061    for (int i = 0; i < NUM_STRATEGIES; i++) {
5062        mStrategyMutedByDevice[i] = false;
5063    }
5064    if (profile != NULL) {
5065        mAudioPort = profile;
5066        mFlags = profile->mFlags;
5067        mSamplingRate = profile->pickSamplingRate();
5068        mFormat = profile->pickFormat();
5069        mChannelMask = profile->pickChannelMask();
5070        if (profile->mGains.size() > 0) {
5071            profile->mGains[0]->getDefaultConfig(&mGain);
5072        }
5073    }
5074}
5075
5076audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5077{
5078    if (isDuplicated()) {
5079        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5080    } else {
5081        return mDevice;
5082    }
5083}
5084
5085uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5086{
5087    if (isDuplicated()) {
5088        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5089    } else {
5090        return mLatency;
5091    }
5092}
5093
5094bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5095        const sp<AudioOutputDescriptor> outputDesc)
5096{
5097    if (isDuplicated()) {
5098        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5099    } else if (outputDesc->isDuplicated()){
5100        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5101    } else {
5102        return (mProfile->mModule == outputDesc->mProfile->mModule);
5103    }
5104}
5105
5106void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5107                                                                   int delta)
5108{
5109    // forward usage count change to attached outputs
5110    if (isDuplicated()) {
5111        mOutput1->changeRefCount(stream, delta);
5112        mOutput2->changeRefCount(stream, delta);
5113    }
5114    if ((delta + (int)mRefCount[stream]) < 0) {
5115        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5116              delta, stream, mRefCount[stream]);
5117        mRefCount[stream] = 0;
5118        return;
5119    }
5120    mRefCount[stream] += delta;
5121    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5122}
5123
5124audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5125{
5126    if (isDuplicated()) {
5127        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5128    } else {
5129        return mProfile->mSupportedDevices.types() ;
5130    }
5131}
5132
5133bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5134{
5135    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5136}
5137
5138bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5139                                                                       uint32_t inPastMs,
5140                                                                       nsecs_t sysTime) const
5141{
5142    if ((sysTime == 0) && (inPastMs != 0)) {
5143        sysTime = systemTime();
5144    }
5145    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5146        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5147                (NUM_STRATEGIES == strategy)) &&
5148                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5149            return true;
5150        }
5151    }
5152    return false;
5153}
5154
5155bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5156                                                                       uint32_t inPastMs,
5157                                                                       nsecs_t sysTime) const
5158{
5159    if (mRefCount[stream] != 0) {
5160        return true;
5161    }
5162    if (inPastMs == 0) {
5163        return false;
5164    }
5165    if (sysTime == 0) {
5166        sysTime = systemTime();
5167    }
5168    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5169        return true;
5170    }
5171    return false;
5172}
5173
5174void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5175                                                 struct audio_port_config *dstConfig,
5176                                                 const struct audio_port_config *srcConfig) const
5177{
5178    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5179
5180    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5181                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5182    if (srcConfig != NULL) {
5183        dstConfig->config_mask |= srcConfig->config_mask;
5184    }
5185    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5186
5187    dstConfig->id = mId;
5188    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5189    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5190    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5191    dstConfig->ext.mix.handle = mIoHandle;
5192    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5193}
5194
5195void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5196                                                    struct audio_port *port) const
5197{
5198    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5199    mProfile->toAudioPort(port);
5200    port->id = mId;
5201    toAudioPortConfig(&port->active_config);
5202    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5203    port->ext.mix.handle = mIoHandle;
5204    port->ext.mix.latency_class =
5205            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5206}
5207
5208status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5209{
5210    const size_t SIZE = 256;
5211    char buffer[SIZE];
5212    String8 result;
5213
5214    snprintf(buffer, SIZE, " ID: %d\n", mId);
5215    result.append(buffer);
5216    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5217    result.append(buffer);
5218    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5219    result.append(buffer);
5220    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5221    result.append(buffer);
5222    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5223    result.append(buffer);
5224    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5225    result.append(buffer);
5226    snprintf(buffer, SIZE, " Devices %08x\n", device());
5227    result.append(buffer);
5228    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5229    result.append(buffer);
5230    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5231        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5232                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5233        result.append(buffer);
5234    }
5235    write(fd, result.string(), result.size());
5236
5237    return NO_ERROR;
5238}
5239
5240// --- AudioInputDescriptor class implementation
5241
5242AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5243    : mId(0), mIoHandle(0),
5244      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5245      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5246{
5247    if (profile != NULL) {
5248        mAudioPort = profile;
5249        mSamplingRate = profile->pickSamplingRate();
5250        mFormat = profile->pickFormat();
5251        mChannelMask = profile->pickChannelMask();
5252        if (profile->mGains.size() > 0) {
5253            profile->mGains[0]->getDefaultConfig(&mGain);
5254        }
5255    }
5256}
5257
5258void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5259                                                   struct audio_port_config *dstConfig,
5260                                                   const struct audio_port_config *srcConfig) const
5261{
5262    ALOG_ASSERT(mProfile != 0,
5263                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5264    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5265                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5266    if (srcConfig != NULL) {
5267        dstConfig->config_mask |= srcConfig->config_mask;
5268    }
5269
5270    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5271
5272    dstConfig->id = mId;
5273    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5274    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5275    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5276    dstConfig->ext.mix.handle = mIoHandle;
5277    dstConfig->ext.mix.usecase.source = mInputSource;
5278}
5279
5280void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5281                                                    struct audio_port *port) const
5282{
5283    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5284
5285    mProfile->toAudioPort(port);
5286    port->id = mId;
5287    toAudioPortConfig(&port->active_config);
5288    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5289    port->ext.mix.handle = mIoHandle;
5290    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5291}
5292
5293status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5294{
5295    const size_t SIZE = 256;
5296    char buffer[SIZE];
5297    String8 result;
5298
5299    snprintf(buffer, SIZE, " ID: %d\n", mId);
5300    result.append(buffer);
5301    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5302    result.append(buffer);
5303    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5304    result.append(buffer);
5305    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5306    result.append(buffer);
5307    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5308    result.append(buffer);
5309    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5310    result.append(buffer);
5311    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5312    result.append(buffer);
5313
5314    write(fd, result.string(), result.size());
5315
5316    return NO_ERROR;
5317}
5318
5319// --- StreamDescriptor class implementation
5320
5321AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5322    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5323{
5324    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5325}
5326
5327int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5328{
5329    device = AudioPolicyManager::getDeviceForVolume(device);
5330    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5331    if (mIndexCur.indexOfKey(device) < 0) {
5332        device = AUDIO_DEVICE_OUT_DEFAULT;
5333    }
5334    return mIndexCur.valueFor(device);
5335}
5336
5337void AudioPolicyManager::StreamDescriptor::dump(int fd)
5338{
5339    const size_t SIZE = 256;
5340    char buffer[SIZE];
5341    String8 result;
5342
5343    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5344             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5345    result.append(buffer);
5346    for (size_t i = 0; i < mIndexCur.size(); i++) {
5347        snprintf(buffer, SIZE, "%04x : %02d, ",
5348                 mIndexCur.keyAt(i),
5349                 mIndexCur.valueAt(i));
5350        result.append(buffer);
5351    }
5352    result.append("\n");
5353
5354    write(fd, result.string(), result.size());
5355}
5356
5357// --- EffectDescriptor class implementation
5358
5359status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5360{
5361    const size_t SIZE = 256;
5362    char buffer[SIZE];
5363    String8 result;
5364
5365    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5366    result.append(buffer);
5367    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5368    result.append(buffer);
5369    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5370    result.append(buffer);
5371    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5372    result.append(buffer);
5373    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5374    result.append(buffer);
5375    write(fd, result.string(), result.size());
5376
5377    return NO_ERROR;
5378}
5379
5380// --- HwModule class implementation
5381
5382AudioPolicyManager::HwModule::HwModule(const char *name)
5383    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5384      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5385{
5386}
5387
5388AudioPolicyManager::HwModule::~HwModule()
5389{
5390    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5391        mOutputProfiles[i]->mSupportedDevices.clear();
5392    }
5393    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5394        mInputProfiles[i]->mSupportedDevices.clear();
5395    }
5396    free((void *)mName);
5397}
5398
5399status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5400{
5401    cnode *node = root->first_child;
5402
5403    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5404
5405    while (node) {
5406        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5407            profile->loadSamplingRates((char *)node->value);
5408        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5409            profile->loadFormats((char *)node->value);
5410        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5411            profile->loadInChannels((char *)node->value);
5412        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5413            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5414                                                           mDeclaredDevices);
5415        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5416            profile->loadGains(node);
5417        }
5418        node = node->next;
5419    }
5420    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5421            "loadInput() invalid supported devices");
5422    ALOGW_IF(profile->mChannelMasks.size() == 0,
5423            "loadInput() invalid supported channel masks");
5424    ALOGW_IF(profile->mSamplingRates.size() == 0,
5425            "loadInput() invalid supported sampling rates");
5426    ALOGW_IF(profile->mFormats.size() == 0,
5427            "loadInput() invalid supported formats");
5428    if (!profile->mSupportedDevices.isEmpty() &&
5429            (profile->mChannelMasks.size() != 0) &&
5430            (profile->mSamplingRates.size() != 0) &&
5431            (profile->mFormats.size() != 0)) {
5432
5433        ALOGV("loadInput() adding input Supported Devices %04x",
5434              profile->mSupportedDevices.types());
5435
5436        mInputProfiles.add(profile);
5437        return NO_ERROR;
5438    } else {
5439        return BAD_VALUE;
5440    }
5441}
5442
5443status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5444{
5445    cnode *node = root->first_child;
5446
5447    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5448
5449    while (node) {
5450        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5451            profile->loadSamplingRates((char *)node->value);
5452        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5453            profile->loadFormats((char *)node->value);
5454        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5455            profile->loadOutChannels((char *)node->value);
5456        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5457            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5458                                                           mDeclaredDevices);
5459        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5460            profile->mFlags = parseFlagNames((char *)node->value);
5461        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5462            profile->loadGains(node);
5463        }
5464        node = node->next;
5465    }
5466    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5467            "loadOutput() invalid supported devices");
5468    ALOGW_IF(profile->mChannelMasks.size() == 0,
5469            "loadOutput() invalid supported channel masks");
5470    ALOGW_IF(profile->mSamplingRates.size() == 0,
5471            "loadOutput() invalid supported sampling rates");
5472    ALOGW_IF(profile->mFormats.size() == 0,
5473            "loadOutput() invalid supported formats");
5474    if (!profile->mSupportedDevices.isEmpty() &&
5475            (profile->mChannelMasks.size() != 0) &&
5476            (profile->mSamplingRates.size() != 0) &&
5477            (profile->mFormats.size() != 0)) {
5478
5479        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5480              profile->mSupportedDevices.types(), profile->mFlags);
5481
5482        mOutputProfiles.add(profile);
5483        return NO_ERROR;
5484    } else {
5485        return BAD_VALUE;
5486    }
5487}
5488
5489status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5490{
5491    cnode *node = root->first_child;
5492
5493    audio_devices_t type = AUDIO_DEVICE_NONE;
5494    while (node) {
5495        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5496            type = parseDeviceNames((char *)node->value);
5497            break;
5498        }
5499        node = node->next;
5500    }
5501    if (type == AUDIO_DEVICE_NONE ||
5502            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5503        ALOGW("loadDevice() bad type %08x", type);
5504        return BAD_VALUE;
5505    }
5506    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5507    deviceDesc->mModule = this;
5508
5509    node = root->first_child;
5510    while (node) {
5511        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5512            deviceDesc->mAddress = String8((char *)node->value);
5513        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5514            if (audio_is_input_device(type)) {
5515                deviceDesc->loadInChannels((char *)node->value);
5516            } else {
5517                deviceDesc->loadOutChannels((char *)node->value);
5518            }
5519        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5520            deviceDesc->loadGains(node);
5521        }
5522        node = node->next;
5523    }
5524
5525    ALOGV("loadDevice() adding device name %s type %08x address %s",
5526          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5527
5528    mDeclaredDevices.add(deviceDesc);
5529
5530    return NO_ERROR;
5531}
5532
5533void AudioPolicyManager::HwModule::dump(int fd)
5534{
5535    const size_t SIZE = 256;
5536    char buffer[SIZE];
5537    String8 result;
5538
5539    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5540    result.append(buffer);
5541    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5542    result.append(buffer);
5543    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5544    result.append(buffer);
5545    write(fd, result.string(), result.size());
5546    if (mOutputProfiles.size()) {
5547        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5548        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5549            snprintf(buffer, SIZE, "    output %zu:\n", i);
5550            write(fd, buffer, strlen(buffer));
5551            mOutputProfiles[i]->dump(fd);
5552        }
5553    }
5554    if (mInputProfiles.size()) {
5555        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5556        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5557            snprintf(buffer, SIZE, "    input %zu:\n", i);
5558            write(fd, buffer, strlen(buffer));
5559            mInputProfiles[i]->dump(fd);
5560        }
5561    }
5562    if (mDeclaredDevices.size()) {
5563        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5564        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5565            mDeclaredDevices[i]->dump(fd, 4, i);
5566        }
5567    }
5568}
5569
5570// --- AudioPort class implementation
5571
5572
5573AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5574          audio_port_role_t role, const sp<HwModule>& module) :
5575    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5576{
5577    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5578                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5579}
5580
5581void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5582{
5583    port->role = mRole;
5584    port->type = mType;
5585    unsigned int i;
5586    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5587        port->sample_rates[i] = mSamplingRates[i];
5588    }
5589    port->num_sample_rates = i;
5590    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5591        port->channel_masks[i] = mChannelMasks[i];
5592    }
5593    port->num_channel_masks = i;
5594    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5595        port->formats[i] = mFormats[i];
5596    }
5597    port->num_formats = i;
5598
5599    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5600
5601    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5602        port->gains[i] = mGains[i]->mGain;
5603    }
5604    port->num_gains = i;
5605}
5606
5607
5608void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5609{
5610    char *str = strtok(name, "|");
5611
5612    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5613    // rates should be read from the output stream after it is opened for the first time
5614    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5615        mSamplingRates.add(0);
5616        return;
5617    }
5618
5619    while (str != NULL) {
5620        uint32_t rate = atoi(str);
5621        if (rate != 0) {
5622            ALOGV("loadSamplingRates() adding rate %d", rate);
5623            mSamplingRates.add(rate);
5624        }
5625        str = strtok(NULL, "|");
5626    }
5627}
5628
5629void AudioPolicyManager::AudioPort::loadFormats(char *name)
5630{
5631    char *str = strtok(name, "|");
5632
5633    // by convention, "0' in the first entry in mFormats indicates the supported formats
5634    // should be read from the output stream after it is opened for the first time
5635    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5636        mFormats.add(AUDIO_FORMAT_DEFAULT);
5637        return;
5638    }
5639
5640    while (str != NULL) {
5641        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5642                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5643                                                             str);
5644        if (format != AUDIO_FORMAT_DEFAULT) {
5645            mFormats.add(format);
5646        }
5647        str = strtok(NULL, "|");
5648    }
5649}
5650
5651void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5652{
5653    const char *str = strtok(name, "|");
5654
5655    ALOGV("loadInChannels() %s", name);
5656
5657    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5658        mChannelMasks.add(0);
5659        return;
5660    }
5661
5662    while (str != NULL) {
5663        audio_channel_mask_t channelMask =
5664                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5665                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5666                                                   str);
5667        if (channelMask != 0) {
5668            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5669            mChannelMasks.add(channelMask);
5670        }
5671        str = strtok(NULL, "|");
5672    }
5673}
5674
5675void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5676{
5677    const char *str = strtok(name, "|");
5678
5679    ALOGV("loadOutChannels() %s", name);
5680
5681    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5682    // masks should be read from the output stream after it is opened for the first time
5683    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5684        mChannelMasks.add(0);
5685        return;
5686    }
5687
5688    while (str != NULL) {
5689        audio_channel_mask_t channelMask =
5690                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5691                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5692                                                   str);
5693        if (channelMask != 0) {
5694            mChannelMasks.add(channelMask);
5695        }
5696        str = strtok(NULL, "|");
5697    }
5698    return;
5699}
5700
5701audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5702{
5703    const char *str = strtok(name, "|");
5704
5705    ALOGV("loadGainMode() %s", name);
5706    audio_gain_mode_t mode = 0;
5707    while (str != NULL) {
5708        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5709                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5710                                                str);
5711        str = strtok(NULL, "|");
5712    }
5713    return mode;
5714}
5715
5716void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5717{
5718    cnode *node = root->first_child;
5719
5720    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5721
5722    while (node) {
5723        if (strcmp(node->name, GAIN_MODE) == 0) {
5724            gain->mGain.mode = loadGainMode((char *)node->value);
5725        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5726            if (mUseInChannelMask) {
5727                gain->mGain.channel_mask =
5728                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5729                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5730                                                           (char *)node->value);
5731            } else {
5732                gain->mGain.channel_mask =
5733                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5734                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5735                                                           (char *)node->value);
5736            }
5737        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5738            gain->mGain.min_value = atoi((char *)node->value);
5739        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5740            gain->mGain.max_value = atoi((char *)node->value);
5741        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5742            gain->mGain.default_value = atoi((char *)node->value);
5743        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5744            gain->mGain.step_value = atoi((char *)node->value);
5745        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5746            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5747        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5748            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5749        }
5750        node = node->next;
5751    }
5752
5753    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5754          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5755
5756    if (gain->mGain.mode == 0) {
5757        return;
5758    }
5759    mGains.add(gain);
5760}
5761
5762void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5763{
5764    cnode *node = root->first_child;
5765    int index = 0;
5766    while (node) {
5767        ALOGV("loadGains() loading gain %s", node->name);
5768        loadGain(node, index++);
5769        node = node->next;
5770    }
5771}
5772
5773status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5774{
5775    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5776        if (mSamplingRates[i] == samplingRate) {
5777            return NO_ERROR;
5778        }
5779    }
5780    return BAD_VALUE;
5781}
5782
5783status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5784        uint32_t *updatedSamplingRate) const
5785{
5786    // Search for the closest supported sampling rate that is above (preferred)
5787    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5788    // The sampling rates do not need to be sorted in ascending order.
5789    ssize_t maxBelow = -1;
5790    ssize_t minAbove = -1;
5791    uint32_t candidate;
5792    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5793        candidate = mSamplingRates[i];
5794        if (candidate == samplingRate) {
5795            if (updatedSamplingRate != NULL) {
5796                *updatedSamplingRate = candidate;
5797            }
5798            return NO_ERROR;
5799        }
5800        // candidate < desired
5801        if (candidate < samplingRate) {
5802            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5803                maxBelow = i;
5804            }
5805        // candidate > desired
5806        } else {
5807            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5808                minAbove = i;
5809            }
5810        }
5811    }
5812    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5813    // TODO Move these assumptions out.
5814    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5815    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5816                                                    // due to approximation by an int32_t of the
5817                                                    // phase increments
5818    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5819    if (minAbove >= 0) {
5820        candidate = mSamplingRates[minAbove];
5821        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5822            if (updatedSamplingRate != NULL) {
5823                *updatedSamplingRate = candidate;
5824            }
5825            return NO_ERROR;
5826        }
5827    }
5828    // But if we have to up-sample from a lower sampling rate, that's OK.
5829    if (maxBelow >= 0) {
5830        candidate = mSamplingRates[maxBelow];
5831        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5832            if (updatedSamplingRate != NULL) {
5833                *updatedSamplingRate = candidate;
5834            }
5835            return NO_ERROR;
5836        }
5837    }
5838    // leave updatedSamplingRate unmodified
5839    return BAD_VALUE;
5840}
5841
5842status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5843{
5844    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5845        if (mChannelMasks[i] == channelMask) {
5846            return NO_ERROR;
5847        }
5848    }
5849    return BAD_VALUE;
5850}
5851
5852status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5853        const
5854{
5855    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5856    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5857        // FIXME Does not handle multi-channel automatic conversions yet
5858        audio_channel_mask_t supported = mChannelMasks[i];
5859        if (supported == channelMask) {
5860            return NO_ERROR;
5861        }
5862        if (isRecordThread) {
5863            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5864            // FIXME Abstract this out to a table.
5865            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5866                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5867                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5868                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5869                return NO_ERROR;
5870            }
5871        }
5872    }
5873    return BAD_VALUE;
5874}
5875
5876status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
5877{
5878    for (size_t i = 0; i < mFormats.size(); i ++) {
5879        if (mFormats[i] == format) {
5880            return NO_ERROR;
5881        }
5882    }
5883    return BAD_VALUE;
5884}
5885
5886
5887uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
5888{
5889    // special case for uninitialized dynamic profile
5890    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
5891        return 0;
5892    }
5893
5894    uint32_t samplingRate = 0;
5895    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
5896
5897    // For mixed output and inputs, use max mixer sampling rates. Do not
5898    // limit sampling rate otherwise
5899    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5900            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5901            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5902        maxRate = UINT_MAX;
5903    }
5904    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5905        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
5906            samplingRate = mSamplingRates[i];
5907        }
5908    }
5909    return samplingRate;
5910}
5911
5912audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
5913{
5914    // special case for uninitialized dynamic profile
5915    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
5916        return AUDIO_CHANNEL_NONE;
5917    }
5918
5919    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
5920    uint32_t channelCount = 0;
5921    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
5922
5923    // For mixed output and inputs, use max mixer channel count. Do not
5924    // limit channel count otherwise
5925    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5926            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5927            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5928        maxCount = UINT_MAX;
5929    }
5930    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5931        uint32_t cnlCount;
5932        if (mUseInChannelMask) {
5933            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
5934        } else {
5935            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
5936        }
5937        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
5938            channelMask = mChannelMasks[i];
5939        }
5940    }
5941    return channelMask;
5942}
5943
5944/* format in order of increasing preference */
5945const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
5946        AUDIO_FORMAT_DEFAULT,
5947        AUDIO_FORMAT_PCM_16_BIT,
5948        AUDIO_FORMAT_PCM_8_24_BIT,
5949        AUDIO_FORMAT_PCM_24_BIT_PACKED,
5950        AUDIO_FORMAT_PCM_32_BIT,
5951        AUDIO_FORMAT_PCM_FLOAT,
5952};
5953
5954int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
5955                                                  audio_format_t format2)
5956{
5957    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
5958    // compressed format and better than any PCM format. This is by design of pickFormat()
5959    if (!audio_is_linear_pcm(format1)) {
5960        if (!audio_is_linear_pcm(format2)) {
5961            return 0;
5962        }
5963        return 1;
5964    }
5965    if (!audio_is_linear_pcm(format2)) {
5966        return -1;
5967    }
5968
5969    int index1 = -1, index2 = -1;
5970    for (size_t i = 0;
5971            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
5972            i ++) {
5973        if (sPcmFormatCompareTable[i] == format1) {
5974            index1 = i;
5975        }
5976        if (sPcmFormatCompareTable[i] == format2) {
5977            index2 = i;
5978        }
5979    }
5980    // format1 not found => index1 < 0 => format2 > format1
5981    // format2 not found => index2 < 0 => format2 < format1
5982    return index1 - index2;
5983}
5984
5985audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
5986{
5987    // special case for uninitialized dynamic profile
5988    if (mFormats.size() == 1 && mFormats[0] == 0) {
5989        return AUDIO_FORMAT_DEFAULT;
5990    }
5991
5992    audio_format_t format = AUDIO_FORMAT_DEFAULT;
5993    audio_format_t bestFormat =
5994            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
5995                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
5996    // For mixed output and inputs, use best mixer output format. Do not
5997    // limit format otherwise
5998    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5999            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6000             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6001        bestFormat = AUDIO_FORMAT_INVALID;
6002    }
6003
6004    for (size_t i = 0; i < mFormats.size(); i ++) {
6005        if ((compareFormats(mFormats[i], format) > 0) &&
6006                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6007            format = mFormats[i];
6008        }
6009    }
6010    return format;
6011}
6012
6013status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6014                                                  int index) const
6015{
6016    if (index < 0 || (size_t)index >= mGains.size()) {
6017        return BAD_VALUE;
6018    }
6019    return mGains[index]->checkConfig(gainConfig);
6020}
6021
6022void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6023{
6024    const size_t SIZE = 256;
6025    char buffer[SIZE];
6026    String8 result;
6027
6028    if (mName.size() != 0) {
6029        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6030        result.append(buffer);
6031    }
6032
6033    if (mSamplingRates.size() != 0) {
6034        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6035        result.append(buffer);
6036        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6037            if (i == 0 && mSamplingRates[i] == 0) {
6038                snprintf(buffer, SIZE, "Dynamic");
6039            } else {
6040                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6041            }
6042            result.append(buffer);
6043            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6044        }
6045        result.append("\n");
6046    }
6047
6048    if (mChannelMasks.size() != 0) {
6049        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6050        result.append(buffer);
6051        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6052            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6053
6054            if (i == 0 && mChannelMasks[i] == 0) {
6055                snprintf(buffer, SIZE, "Dynamic");
6056            } else {
6057                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6058            }
6059            result.append(buffer);
6060            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6061        }
6062        result.append("\n");
6063    }
6064
6065    if (mFormats.size() != 0) {
6066        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6067        result.append(buffer);
6068        for (size_t i = 0; i < mFormats.size(); i++) {
6069            const char *formatStr = enumToString(sFormatNameToEnumTable,
6070                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6071                                                 mFormats[i]);
6072            if (i == 0 && strcmp(formatStr, "") == 0) {
6073                snprintf(buffer, SIZE, "Dynamic");
6074            } else {
6075                snprintf(buffer, SIZE, "%s", formatStr);
6076            }
6077            result.append(buffer);
6078            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6079        }
6080        result.append("\n");
6081    }
6082    write(fd, result.string(), result.size());
6083    if (mGains.size() != 0) {
6084        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6085        write(fd, buffer, strlen(buffer) + 1);
6086        result.append(buffer);
6087        for (size_t i = 0; i < mGains.size(); i++) {
6088            mGains[i]->dump(fd, spaces + 2, i);
6089        }
6090    }
6091}
6092
6093// --- AudioGain class implementation
6094
6095AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6096{
6097    mIndex = index;
6098    mUseInChannelMask = useInChannelMask;
6099    memset(&mGain, 0, sizeof(struct audio_gain));
6100}
6101
6102void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6103{
6104    config->index = mIndex;
6105    config->mode = mGain.mode;
6106    config->channel_mask = mGain.channel_mask;
6107    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6108        config->values[0] = mGain.default_value;
6109    } else {
6110        uint32_t numValues;
6111        if (mUseInChannelMask) {
6112            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6113        } else {
6114            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6115        }
6116        for (size_t i = 0; i < numValues; i++) {
6117            config->values[i] = mGain.default_value;
6118        }
6119    }
6120    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6121        config->ramp_duration_ms = mGain.min_ramp_ms;
6122    }
6123}
6124
6125status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6126{
6127    if ((config->mode & ~mGain.mode) != 0) {
6128        return BAD_VALUE;
6129    }
6130    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6131        if ((config->values[0] < mGain.min_value) ||
6132                    (config->values[0] > mGain.max_value)) {
6133            return BAD_VALUE;
6134        }
6135    } else {
6136        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6137            return BAD_VALUE;
6138        }
6139        uint32_t numValues;
6140        if (mUseInChannelMask) {
6141            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6142        } else {
6143            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6144        }
6145        for (size_t i = 0; i < numValues; i++) {
6146            if ((config->values[i] < mGain.min_value) ||
6147                    (config->values[i] > mGain.max_value)) {
6148                return BAD_VALUE;
6149            }
6150        }
6151    }
6152    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6153        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6154                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6155            return BAD_VALUE;
6156        }
6157    }
6158    return NO_ERROR;
6159}
6160
6161void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6162{
6163    const size_t SIZE = 256;
6164    char buffer[SIZE];
6165    String8 result;
6166
6167    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6168    result.append(buffer);
6169    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6170    result.append(buffer);
6171    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6172    result.append(buffer);
6173    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6174    result.append(buffer);
6175    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6176    result.append(buffer);
6177    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6178    result.append(buffer);
6179    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6180    result.append(buffer);
6181    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6182    result.append(buffer);
6183    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6184    result.append(buffer);
6185
6186    write(fd, result.string(), result.size());
6187}
6188
6189// --- AudioPortConfig class implementation
6190
6191AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6192{
6193    mSamplingRate = 0;
6194    mChannelMask = AUDIO_CHANNEL_NONE;
6195    mFormat = AUDIO_FORMAT_INVALID;
6196    mGain.index = -1;
6197}
6198
6199status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6200                                                        const struct audio_port_config *config,
6201                                                        struct audio_port_config *backupConfig)
6202{
6203    struct audio_port_config localBackupConfig;
6204    status_t status = NO_ERROR;
6205
6206    localBackupConfig.config_mask = config->config_mask;
6207    toAudioPortConfig(&localBackupConfig);
6208
6209    if (mAudioPort == 0) {
6210        status = NO_INIT;
6211        goto exit;
6212    }
6213    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6214        status = mAudioPort->checkExactSamplingRate(config->sample_rate);
6215        if (status != NO_ERROR) {
6216            goto exit;
6217        }
6218        mSamplingRate = config->sample_rate;
6219    }
6220    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6221        status = mAudioPort->checkExactChannelMask(config->channel_mask);
6222        if (status != NO_ERROR) {
6223            goto exit;
6224        }
6225        mChannelMask = config->channel_mask;
6226    }
6227    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6228        status = mAudioPort->checkFormat(config->format);
6229        if (status != NO_ERROR) {
6230            goto exit;
6231        }
6232        mFormat = config->format;
6233    }
6234    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6235        status = mAudioPort->checkGain(&config->gain, config->gain.index);
6236        if (status != NO_ERROR) {
6237            goto exit;
6238        }
6239        mGain = config->gain;
6240    }
6241
6242exit:
6243    if (status != NO_ERROR) {
6244        applyAudioPortConfig(&localBackupConfig);
6245    }
6246    if (backupConfig != NULL) {
6247        *backupConfig = localBackupConfig;
6248    }
6249    return status;
6250}
6251
6252void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6253                                                    struct audio_port_config *dstConfig,
6254                                                    const struct audio_port_config *srcConfig) const
6255{
6256    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6257        dstConfig->sample_rate = mSamplingRate;
6258        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6259            dstConfig->sample_rate = srcConfig->sample_rate;
6260        }
6261    } else {
6262        dstConfig->sample_rate = 0;
6263    }
6264    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6265        dstConfig->channel_mask = mChannelMask;
6266        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6267            dstConfig->channel_mask = srcConfig->channel_mask;
6268        }
6269    } else {
6270        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6271    }
6272    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6273        dstConfig->format = mFormat;
6274        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6275            dstConfig->format = srcConfig->format;
6276        }
6277    } else {
6278        dstConfig->format = AUDIO_FORMAT_INVALID;
6279    }
6280    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6281        dstConfig->gain = mGain;
6282        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6283            dstConfig->gain = srcConfig->gain;
6284        }
6285    } else {
6286        dstConfig->gain.index = -1;
6287    }
6288    if (dstConfig->gain.index != -1) {
6289        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6290    } else {
6291        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6292    }
6293}
6294
6295// --- IOProfile class implementation
6296
6297AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6298                                         const sp<HwModule>& module)
6299    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6300{
6301}
6302
6303AudioPolicyManager::IOProfile::~IOProfile()
6304{
6305}
6306
6307// checks if the IO profile is compatible with specified parameters.
6308// Sampling rate, format and channel mask must be specified in order to
6309// get a valid a match
6310bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6311                                                            uint32_t samplingRate,
6312                                                            uint32_t *updatedSamplingRate,
6313                                                            audio_format_t format,
6314                                                            audio_channel_mask_t channelMask,
6315                                                            audio_output_flags_t flags) const
6316{
6317    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6318    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6319    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6320
6321    if ((mSupportedDevices.types() & device) != device) {
6322        return false;
6323    }
6324
6325    if (samplingRate == 0) {
6326         return false;
6327    }
6328    uint32_t myUpdatedSamplingRate = samplingRate;
6329    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6330         return false;
6331    }
6332    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6333            NO_ERROR) {
6334         return false;
6335    }
6336
6337    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6338        return false;
6339    }
6340
6341    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6342            checkExactChannelMask(channelMask) != NO_ERROR)) {
6343        return false;
6344    }
6345    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6346            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6347        return false;
6348    }
6349
6350    if (isPlaybackThread && (mFlags & flags) != flags) {
6351        return false;
6352    }
6353    // The only input flag that is allowed to be different is the fast flag.
6354    // An existing fast stream is compatible with a normal track request.
6355    // An existing normal stream is compatible with a fast track request,
6356    // but the fast request will be denied by AudioFlinger and converted to normal track.
6357    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
6358            ~AUDIO_INPUT_FLAG_FAST)) {
6359        return false;
6360    }
6361
6362    if (updatedSamplingRate != NULL) {
6363        *updatedSamplingRate = myUpdatedSamplingRate;
6364    }
6365    return true;
6366}
6367
6368void AudioPolicyManager::IOProfile::dump(int fd)
6369{
6370    const size_t SIZE = 256;
6371    char buffer[SIZE];
6372    String8 result;
6373
6374    AudioPort::dump(fd, 4);
6375
6376    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6377    result.append(buffer);
6378    snprintf(buffer, SIZE, "    - devices:\n");
6379    result.append(buffer);
6380    write(fd, result.string(), result.size());
6381    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6382        mSupportedDevices[i]->dump(fd, 6, i);
6383    }
6384}
6385
6386void AudioPolicyManager::IOProfile::log()
6387{
6388    const size_t SIZE = 256;
6389    char buffer[SIZE];
6390    String8 result;
6391
6392    ALOGV("    - sampling rates: ");
6393    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6394        ALOGV("  %d", mSamplingRates[i]);
6395    }
6396
6397    ALOGV("    - channel masks: ");
6398    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6399        ALOGV("  0x%04x", mChannelMasks[i]);
6400    }
6401
6402    ALOGV("    - formats: ");
6403    for (size_t i = 0; i < mFormats.size(); i++) {
6404        ALOGV("  0x%08x", mFormats[i]);
6405    }
6406
6407    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6408    ALOGV("    - flags: 0x%04x\n", mFlags);
6409}
6410
6411
6412// --- DeviceDescriptor implementation
6413
6414
6415AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6416                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6417                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6418                                                              AUDIO_PORT_ROLE_SOURCE,
6419                             NULL),
6420                     mDeviceType(type), mAddress(""), mId(0)
6421{
6422    mAudioPort = this;
6423    if (mGains.size() > 0) {
6424        mGains[0]->getDefaultConfig(&mGain);
6425    }
6426}
6427
6428bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6429{
6430    // Devices are considered equal if they:
6431    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6432    // - have the same address or one device does not specify the address
6433    // - have the same channel mask or one device does not specify the channel mask
6434    return (mDeviceType == other->mDeviceType) &&
6435           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6436           (mChannelMask == 0 || other->mChannelMask == 0 ||
6437                mChannelMask == other->mChannelMask);
6438}
6439
6440void AudioPolicyManager::DeviceVector::refreshTypes()
6441{
6442    mDeviceTypes = AUDIO_DEVICE_NONE;
6443    for(size_t i = 0; i < size(); i++) {
6444        mDeviceTypes |= itemAt(i)->mDeviceType;
6445    }
6446    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6447}
6448
6449ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6450{
6451    for(size_t i = 0; i < size(); i++) {
6452        if (item->equals(itemAt(i))) {
6453            return i;
6454        }
6455    }
6456    return -1;
6457}
6458
6459ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6460{
6461    ssize_t ret = indexOf(item);
6462
6463    if (ret < 0) {
6464        ret = SortedVector::add(item);
6465        if (ret >= 0) {
6466            refreshTypes();
6467        }
6468    } else {
6469        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6470        ret = -1;
6471    }
6472    return ret;
6473}
6474
6475ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6476{
6477    size_t i;
6478    ssize_t ret = indexOf(item);
6479
6480    if (ret < 0) {
6481        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6482    } else {
6483        ret = SortedVector::removeAt(ret);
6484        if (ret >= 0) {
6485            refreshTypes();
6486        }
6487    }
6488    return ret;
6489}
6490
6491void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6492{
6493    DeviceVector deviceList;
6494
6495    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6496    types &= ~role_bit;
6497
6498    while (types) {
6499        uint32_t i = 31 - __builtin_clz(types);
6500        uint32_t type = 1 << i;
6501        types &= ~type;
6502        add(new DeviceDescriptor(String8(""), type | role_bit));
6503    }
6504}
6505
6506void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6507                                                           const DeviceVector& declaredDevices)
6508{
6509    char *devName = strtok(name, "|");
6510    while (devName != NULL) {
6511        if (strlen(devName) != 0) {
6512            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6513                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6514                                 devName);
6515            if (type != AUDIO_DEVICE_NONE) {
6516                add(new DeviceDescriptor(String8(""), type));
6517            } else {
6518                sp<DeviceDescriptor> deviceDesc =
6519                        declaredDevices.getDeviceFromName(String8(devName));
6520                if (deviceDesc != 0) {
6521                    add(deviceDesc);
6522                }
6523            }
6524         }
6525        devName = strtok(NULL, "|");
6526     }
6527}
6528
6529sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6530                                                        audio_devices_t type, String8 address) const
6531{
6532    sp<DeviceDescriptor> device;
6533    for (size_t i = 0; i < size(); i++) {
6534        if (itemAt(i)->mDeviceType == type) {
6535            device = itemAt(i);
6536            if (itemAt(i)->mAddress = address) {
6537                break;
6538            }
6539        }
6540    }
6541    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6542          type, address.string(), device.get());
6543    return device;
6544}
6545
6546sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6547                                                                    audio_port_handle_t id) const
6548{
6549    sp<DeviceDescriptor> device;
6550    for (size_t i = 0; i < size(); i++) {
6551        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6552        if (itemAt(i)->mId == id) {
6553            device = itemAt(i);
6554            break;
6555        }
6556    }
6557    return device;
6558}
6559
6560AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6561                                                                        audio_devices_t type) const
6562{
6563    DeviceVector devices;
6564    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6565        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6566            devices.add(itemAt(i));
6567            type &= ~itemAt(i)->mDeviceType;
6568            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6569                  itemAt(i)->mDeviceType, itemAt(i).get());
6570        }
6571    }
6572    return devices;
6573}
6574
6575AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6576        audio_devices_t type, String8 address) const
6577{
6578    DeviceVector devices;
6579    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6580    for (size_t i = 0; i < size(); i++) {
6581        //ALOGV("     at i=%d: device=%x, addr=%s",
6582        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6583        if (itemAt(i)->mDeviceType == type) {
6584            if (itemAt(i)->mAddress == address) {
6585                //ALOGV("      found matching address %s", address.string());
6586                devices.add(itemAt(i));
6587            }
6588        }
6589    }
6590    return devices;
6591}
6592
6593sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6594        const String8& name) const
6595{
6596    sp<DeviceDescriptor> device;
6597    for (size_t i = 0; i < size(); i++) {
6598        if (itemAt(i)->mName == name) {
6599            device = itemAt(i);
6600            break;
6601        }
6602    }
6603    return device;
6604}
6605
6606void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6607                                                    struct audio_port_config *dstConfig,
6608                                                    const struct audio_port_config *srcConfig) const
6609{
6610    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6611    if (srcConfig != NULL) {
6612        dstConfig->config_mask |= srcConfig->config_mask;
6613    }
6614
6615    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6616
6617    dstConfig->id = mId;
6618    dstConfig->role = audio_is_output_device(mDeviceType) ?
6619                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6620    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6621    dstConfig->ext.device.type = mDeviceType;
6622    dstConfig->ext.device.hw_module = mModule->mHandle;
6623    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6624}
6625
6626void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6627{
6628    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6629    AudioPort::toAudioPort(port);
6630    port->id = mId;
6631    toAudioPortConfig(&port->active_config);
6632    port->ext.device.type = mDeviceType;
6633    port->ext.device.hw_module = mModule->mHandle;
6634    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6635}
6636
6637status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6638{
6639    const size_t SIZE = 256;
6640    char buffer[SIZE];
6641    String8 result;
6642
6643    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6644    result.append(buffer);
6645    if (mId != 0) {
6646        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6647        result.append(buffer);
6648    }
6649    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6650                                              enumToString(sDeviceNameToEnumTable,
6651                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6652                                                           mDeviceType));
6653    result.append(buffer);
6654    if (mAddress.size() != 0) {
6655        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6656        result.append(buffer);
6657    }
6658    write(fd, result.string(), result.size());
6659    AudioPort::dump(fd, spaces);
6660
6661    return NO_ERROR;
6662}
6663
6664status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
6665{
6666    const size_t SIZE = 256;
6667    char buffer[SIZE];
6668    String8 result;
6669
6670
6671    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
6672    result.append(buffer);
6673    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
6674    result.append(buffer);
6675    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
6676    result.append(buffer);
6677    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
6678    result.append(buffer);
6679    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
6680    result.append(buffer);
6681    for (size_t i = 0; i < mPatch.num_sources; i++) {
6682        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
6683            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6684                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
6685                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6686                                                        mPatch.sources[i].ext.device.type));
6687        } else {
6688            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6689                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
6690        }
6691        result.append(buffer);
6692    }
6693    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
6694    result.append(buffer);
6695    for (size_t i = 0; i < mPatch.num_sinks; i++) {
6696        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
6697            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
6698                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
6699                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
6700                                                        mPatch.sinks[i].ext.device.type));
6701        } else {
6702            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
6703                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
6704        }
6705        result.append(buffer);
6706    }
6707
6708    write(fd, result.string(), result.size());
6709    return NO_ERROR;
6710}
6711
6712// --- audio_policy.conf file parsing
6713
6714audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6715{
6716    uint32_t flag = 0;
6717
6718    // it is OK to cast name to non const here as we are not going to use it after
6719    // strtok() modifies it
6720    char *flagName = strtok(name, "|");
6721    while (flagName != NULL) {
6722        if (strlen(flagName) != 0) {
6723            flag |= stringToEnum(sFlagNameToEnumTable,
6724                               ARRAY_SIZE(sFlagNameToEnumTable),
6725                               flagName);
6726        }
6727        flagName = strtok(NULL, "|");
6728    }
6729    //force direct flag if offload flag is set: offloading implies a direct output stream
6730    // and all common behaviors are driven by checking only the direct flag
6731    // this should normally be set appropriately in the policy configuration file
6732    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6733        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6734    }
6735
6736    return (audio_output_flags_t)flag;
6737}
6738
6739audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6740{
6741    uint32_t device = 0;
6742
6743    char *devName = strtok(name, "|");
6744    while (devName != NULL) {
6745        if (strlen(devName) != 0) {
6746            device |= stringToEnum(sDeviceNameToEnumTable,
6747                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6748                                 devName);
6749         }
6750        devName = strtok(NULL, "|");
6751     }
6752    return device;
6753}
6754
6755void AudioPolicyManager::loadHwModule(cnode *root)
6756{
6757    status_t status = NAME_NOT_FOUND;
6758    cnode *node;
6759    sp<HwModule> module = new HwModule(root->name);
6760
6761    node = config_find(root, DEVICES_TAG);
6762    if (node != NULL) {
6763        node = node->first_child;
6764        while (node) {
6765            ALOGV("loadHwModule() loading device %s", node->name);
6766            status_t tmpStatus = module->loadDevice(node);
6767            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6768                status = tmpStatus;
6769            }
6770            node = node->next;
6771        }
6772    }
6773    node = config_find(root, OUTPUTS_TAG);
6774    if (node != NULL) {
6775        node = node->first_child;
6776        while (node) {
6777            ALOGV("loadHwModule() loading output %s", node->name);
6778            status_t tmpStatus = module->loadOutput(node);
6779            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6780                status = tmpStatus;
6781            }
6782            node = node->next;
6783        }
6784    }
6785    node = config_find(root, INPUTS_TAG);
6786    if (node != NULL) {
6787        node = node->first_child;
6788        while (node) {
6789            ALOGV("loadHwModule() loading input %s", node->name);
6790            status_t tmpStatus = module->loadInput(node);
6791            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6792                status = tmpStatus;
6793            }
6794            node = node->next;
6795        }
6796    }
6797    loadGlobalConfig(root, module);
6798
6799    if (status == NO_ERROR) {
6800        mHwModules.add(module);
6801    }
6802}
6803
6804void AudioPolicyManager::loadHwModules(cnode *root)
6805{
6806    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6807    if (node == NULL) {
6808        return;
6809    }
6810
6811    node = node->first_child;
6812    while (node) {
6813        ALOGV("loadHwModules() loading module %s", node->name);
6814        loadHwModule(node);
6815        node = node->next;
6816    }
6817}
6818
6819void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6820{
6821    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6822
6823    if (node == NULL) {
6824        return;
6825    }
6826    DeviceVector declaredDevices;
6827    if (module != NULL) {
6828        declaredDevices = module->mDeclaredDevices;
6829    }
6830
6831    node = node->first_child;
6832    while (node) {
6833        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6834            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6835                                                        declaredDevices);
6836            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6837                  mAvailableOutputDevices.types());
6838        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6839            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6840                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6841                                              (char *)node->value);
6842            if (device != AUDIO_DEVICE_NONE) {
6843                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6844            } else {
6845                ALOGW("loadGlobalConfig() default device not specified");
6846            }
6847            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6848        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6849            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6850                                                       declaredDevices);
6851            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6852        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6853            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6854            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6855        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6856            uint32_t major, minor;
6857            sscanf((char *)node->value, "%u.%u", &major, &minor);
6858            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6859            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6860                  module->mHalVersion, major, minor);
6861        }
6862        node = node->next;
6863    }
6864}
6865
6866status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6867{
6868    cnode *root;
6869    char *data;
6870
6871    data = (char *)load_file(path, NULL);
6872    if (data == NULL) {
6873        return -ENODEV;
6874    }
6875    root = config_node("", "");
6876    config_load(root, data);
6877
6878    loadHwModules(root);
6879    // legacy audio_policy.conf files have one global_configuration section
6880    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
6881    config_free(root);
6882    free(root);
6883    free(data);
6884
6885    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
6886
6887    return NO_ERROR;
6888}
6889
6890void AudioPolicyManager::defaultAudioPolicyConfig(void)
6891{
6892    sp<HwModule> module;
6893    sp<IOProfile> profile;
6894    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
6895                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
6896    mAvailableOutputDevices.add(mDefaultOutputDevice);
6897    mAvailableInputDevices.add(defaultInputDevice);
6898
6899    module = new HwModule("primary");
6900
6901    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
6902    profile->mSamplingRates.add(44100);
6903    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6904    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
6905    profile->mSupportedDevices.add(mDefaultOutputDevice);
6906    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
6907    module->mOutputProfiles.add(profile);
6908
6909    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
6910    profile->mSamplingRates.add(8000);
6911    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6912    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
6913    profile->mSupportedDevices.add(defaultInputDevice);
6914    module->mInputProfiles.add(profile);
6915
6916    mHwModules.add(module);
6917}
6918
6919audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
6920{
6921    // flags to stream type mapping
6922    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
6923        return AUDIO_STREAM_ENFORCED_AUDIBLE;
6924    }
6925    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
6926        return AUDIO_STREAM_BLUETOOTH_SCO;
6927    }
6928
6929    // usage to stream type mapping
6930    switch (attr->usage) {
6931    case AUDIO_USAGE_MEDIA:
6932    case AUDIO_USAGE_GAME:
6933    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
6934    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
6935        return AUDIO_STREAM_MUSIC;
6936    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
6937        return AUDIO_STREAM_SYSTEM;
6938    case AUDIO_USAGE_VOICE_COMMUNICATION:
6939        return AUDIO_STREAM_VOICE_CALL;
6940
6941    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
6942        return AUDIO_STREAM_DTMF;
6943
6944    case AUDIO_USAGE_ALARM:
6945        return AUDIO_STREAM_ALARM;
6946    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
6947        return AUDIO_STREAM_RING;
6948
6949    case AUDIO_USAGE_NOTIFICATION:
6950    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
6951    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
6952    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
6953    case AUDIO_USAGE_NOTIFICATION_EVENT:
6954        return AUDIO_STREAM_NOTIFICATION;
6955
6956    case AUDIO_USAGE_UNKNOWN:
6957    default:
6958        return AUDIO_STREAM_MUSIC;
6959    }
6960}
6961}; // namespace android
6962