AudioPolicyManager.cpp revision cbd48023d0a0e3fd59955011538c0087a439f905 
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 "AudioPolicyManager.h"
47#include "audio_policy_conf.h"
48
49namespace android {
50
51// ----------------------------------------------------------------------------
52// Definitions for audio_policy.conf file parsing
53// ----------------------------------------------------------------------------
54
55struct StringToEnum {
56    const char *name;
57    uint32_t value;
58};
59
60#define STRING_TO_ENUM(string) { #string, string }
61#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
62
63const StringToEnum sDeviceNameToEnumTable[] = {
64    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
65    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
66    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
67    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
68    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO),
69    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET),
70    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
71    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
72    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP),
73    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES),
74    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
75    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
76    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
77    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI),
78    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
79    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
80    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
81    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
82    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
83    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
84    STRING_TO_ENUM(AUDIO_DEVICE_OUT_TELEPHONY_TX),
85    STRING_TO_ENUM(AUDIO_DEVICE_OUT_LINE),
86    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI_ARC),
87    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPDIF),
88    STRING_TO_ENUM(AUDIO_DEVICE_OUT_FM),
89    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
90    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
91    STRING_TO_ENUM(AUDIO_DEVICE_IN_ALL_SCO),
92    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
93    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
94    STRING_TO_ENUM(AUDIO_DEVICE_IN_HDMI),
95    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
96    STRING_TO_ENUM(AUDIO_DEVICE_IN_TELEPHONY_RX),
97    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
98    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
99    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
100    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
101    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
102    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_DEVICE),
103    STRING_TO_ENUM(AUDIO_DEVICE_IN_FM_TUNER),
104    STRING_TO_ENUM(AUDIO_DEVICE_IN_TV_TUNER),
105    STRING_TO_ENUM(AUDIO_DEVICE_IN_LINE),
106    STRING_TO_ENUM(AUDIO_DEVICE_IN_SPDIF),
107    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_A2DP),
108    STRING_TO_ENUM(AUDIO_DEVICE_IN_LOOPBACK),
109};
110
111const StringToEnum sFlagNameToEnumTable[] = {
112    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
113    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
114    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
115    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
116    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
117    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
118};
119
120const StringToEnum sFormatNameToEnumTable[] = {
121    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
122    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
123    STRING_TO_ENUM(AUDIO_FORMAT_PCM_32_BIT),
124    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_24_BIT),
125    STRING_TO_ENUM(AUDIO_FORMAT_PCM_FLOAT),
126    STRING_TO_ENUM(AUDIO_FORMAT_PCM_24_BIT_PACKED),
127    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
128    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
129    STRING_TO_ENUM(AUDIO_FORMAT_AAC_MAIN),
130    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LC),
131    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SSR),
132    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LTP),
133    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V1),
134    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SCALABLE),
135    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ERLC),
136    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LD),
137    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V2),
138    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ELD),
139    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
140    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V1),
141    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V2),
142    STRING_TO_ENUM(AUDIO_FORMAT_OPUS),
143    STRING_TO_ENUM(AUDIO_FORMAT_AC3),
144    STRING_TO_ENUM(AUDIO_FORMAT_E_AC3),
145};
146
147const StringToEnum sOutChannelsNameToEnumTable[] = {
148    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
149    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
150    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
151    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
152};
153
154const StringToEnum sInChannelsNameToEnumTable[] = {
155    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
156    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
157    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
158};
159
160const StringToEnum sGainModeNameToEnumTable[] = {
161    STRING_TO_ENUM(AUDIO_GAIN_MODE_JOINT),
162    STRING_TO_ENUM(AUDIO_GAIN_MODE_CHANNELS),
163    STRING_TO_ENUM(AUDIO_GAIN_MODE_RAMP),
164};
165
166
167uint32_t AudioPolicyManager::stringToEnum(const struct StringToEnum *table,
168                                              size_t size,
169                                              const char *name)
170{
171    for (size_t i = 0; i < size; i++) {
172        if (strcmp(table[i].name, name) == 0) {
173            ALOGV("stringToEnum() found %s", table[i].name);
174            return table[i].value;
175        }
176    }
177    return 0;
178}
179
180const char *AudioPolicyManager::enumToString(const struct StringToEnum *table,
181                                              size_t size,
182                                              uint32_t value)
183{
184    for (size_t i = 0; i < size; i++) {
185        if (table[i].value == value) {
186            return table[i].name;
187        }
188    }
189    return "";
190}
191
192bool AudioPolicyManager::stringToBool(const char *value)
193{
194    return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0));
195}
196
197
198// ----------------------------------------------------------------------------
199// AudioPolicyInterface implementation
200// ----------------------------------------------------------------------------
201
202
203status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
204                                                          audio_policy_dev_state_t state,
205                                                  const char *device_address)
206{
207    String8 address = String8(device_address);
208
209    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s", device, state, device_address);
210
211    // connect/disconnect only 1 device at a time
212    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
213
214    // handle output devices
215    if (audio_is_output_device(device)) {
216        SortedVector <audio_io_handle_t> outputs;
217
218        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
219        devDesc->mAddress = address;
220        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
221
222        // save a copy of the opened output descriptors before any output is opened or closed
223        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
224        mPreviousOutputs = mOutputs;
225        switch (state)
226        {
227        // handle output device connection
228        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
229            if (index >= 0) {
230                ALOGW("setDeviceConnectionState() device already connected: %x", device);
231                return INVALID_OPERATION;
232            }
233            ALOGV("setDeviceConnectionState() connecting device %x", device);
234
235            // register new device as available
236            index = mAvailableOutputDevices.add(devDesc);
237            if (index >= 0) {
238                mAvailableOutputDevices[index]->mId = nextUniqueId();
239                sp<HwModule> module = getModuleForDevice(device);
240                ALOG_ASSERT(module != NULL, "setDeviceConnectionState():"
241                        "could not find HW module for device %08x", device);
242                mAvailableOutputDevices[index]->mModule = module;
243            } else {
244                return NO_MEMORY;
245            }
246
247            if (checkOutputsForDevice(device, state, outputs, address) != NO_ERROR) {
248                mAvailableOutputDevices.remove(devDesc);
249                return INVALID_OPERATION;
250            }
251            // outputs should never be empty here
252            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
253                    "checkOutputsForDevice() returned no outputs but status OK");
254            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
255                  outputs.size());
256            break;
257        // handle output device disconnection
258        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
259            if (index < 0) {
260                ALOGW("setDeviceConnectionState() device not connected: %x", device);
261                return INVALID_OPERATION;
262            }
263
264            ALOGV("setDeviceConnectionState() disconnecting device %x", device);
265            // remove device from available output devices
266            mAvailableOutputDevices.remove(devDesc);
267
268            checkOutputsForDevice(device, state, outputs, address);
269            } break;
270
271        default:
272            ALOGE("setDeviceConnectionState() invalid state: %x", state);
273            return BAD_VALUE;
274        }
275
276        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
277        // output is suspended before any tracks are moved to it
278        checkA2dpSuspend();
279        checkOutputForAllStrategies();
280        // outputs must be closed after checkOutputForAllStrategies() is executed
281        if (!outputs.isEmpty()) {
282            for (size_t i = 0; i < outputs.size(); i++) {
283                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
284                // close unused outputs after device disconnection or direct outputs that have been
285                // opened by checkOutputsForDevice() to query dynamic parameters
286                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
287                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
288                         (desc->mDirectOpenCount == 0))) {
289                    closeOutput(outputs[i]);
290                }
291            }
292            // check again after closing A2DP output to reset mA2dpSuspended if needed
293            checkA2dpSuspend();
294        }
295
296        updateDevicesAndOutputs();
297        for (size_t i = 0; i < mOutputs.size(); i++) {
298            // do not force device change on duplicated output because if device is 0, it will
299            // also force a device 0 for the two outputs it is duplicated to which may override
300            // a valid device selection on those outputs.
301            bool force = !mOutputs.valueAt(i)->isDuplicated()
302                    && (!deviceDistinguishesOnAddress(device)
303                            // always force when disconnecting (a non-duplicated device)
304                            || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
305            setOutputDevice(mOutputs.keyAt(i),
306                            getNewOutputDevice(mOutputs.keyAt(i), true /*fromCache*/),
307                            force, 0);
308        }
309
310        mpClientInterface->onAudioPortListUpdate();
311        return NO_ERROR;
312    }  // end if is output device
313
314    // handle input devices
315    if (audio_is_input_device(device)) {
316        SortedVector <audio_io_handle_t> inputs;
317
318        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
319        devDesc->mAddress = address;
320        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
321        switch (state)
322        {
323        // handle input device connection
324        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
325            if (index >= 0) {
326                ALOGW("setDeviceConnectionState() device already connected: %d", device);
327                return INVALID_OPERATION;
328            }
329            sp<HwModule> module = getModuleForDevice(device);
330            if (module == NULL) {
331                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
332                      device);
333                return INVALID_OPERATION;
334            }
335            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
336                return INVALID_OPERATION;
337            }
338
339            index = mAvailableInputDevices.add(devDesc);
340            if (index >= 0) {
341                mAvailableInputDevices[index]->mId = nextUniqueId();
342                mAvailableInputDevices[index]->mModule = module;
343            } else {
344                return NO_MEMORY;
345            }
346        } break;
347
348        // handle input device disconnection
349        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
350            if (index < 0) {
351                ALOGW("setDeviceConnectionState() device not connected: %d", device);
352                return INVALID_OPERATION;
353            }
354            checkInputsForDevice(device, state, inputs, address);
355            mAvailableInputDevices.remove(devDesc);
356        } break;
357
358        default:
359            ALOGE("setDeviceConnectionState() invalid state: %x", state);
360            return BAD_VALUE;
361        }
362
363        closeAllInputs();
364
365        mpClientInterface->onAudioPortListUpdate();
366        return NO_ERROR;
367    } // end if is input device
368
369    ALOGW("setDeviceConnectionState() invalid device: %x", device);
370    return BAD_VALUE;
371}
372
373audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
374                                                  const char *device_address)
375{
376    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
377    String8 address = String8(device_address);
378    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
379    devDesc->mAddress = String8(device_address);
380    ssize_t index;
381    DeviceVector *deviceVector;
382
383    if (audio_is_output_device(device)) {
384        deviceVector = &mAvailableOutputDevices;
385    } else if (audio_is_input_device(device)) {
386        deviceVector = &mAvailableInputDevices;
387    } else {
388        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
389        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
390    }
391
392    index = deviceVector->indexOf(devDesc);
393    if (index >= 0) {
394        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
395    } else {
396        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
397    }
398}
399
400void AudioPolicyManager::setPhoneState(audio_mode_t state)
401{
402    ALOGV("setPhoneState() state %d", state);
403    audio_devices_t newDevice = AUDIO_DEVICE_NONE;
404    if (state < 0 || state >= AUDIO_MODE_CNT) {
405        ALOGW("setPhoneState() invalid state %d", state);
406        return;
407    }
408
409    if (state == mPhoneState ) {
410        ALOGW("setPhoneState() setting same state %d", state);
411        return;
412    }
413
414    // if leaving call state, handle special case of active streams
415    // pertaining to sonification strategy see handleIncallSonification()
416    if (isInCall()) {
417        ALOGV("setPhoneState() in call state management: new state is %d", state);
418        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
419            handleIncallSonification((audio_stream_type_t)stream, false, true);
420        }
421    }
422
423    // store previous phone state for management of sonification strategy below
424    int oldState = mPhoneState;
425    mPhoneState = state;
426    bool force = false;
427
428    // are we entering or starting a call
429    if (!isStateInCall(oldState) && isStateInCall(state)) {
430        ALOGV("  Entering call in setPhoneState()");
431        // force routing command to audio hardware when starting a call
432        // even if no device change is needed
433        force = true;
434        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
435            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
436                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
437        }
438    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
439        ALOGV("  Exiting call in setPhoneState()");
440        // force routing command to audio hardware when exiting a call
441        // even if no device change is needed
442        force = true;
443        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
444            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
445                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
446        }
447    } else if (isStateInCall(state) && (state != oldState)) {
448        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
449        // force routing command to audio hardware when switching between telephony and VoIP
450        // even if no device change is needed
451        force = true;
452    }
453
454    // check for device and output changes triggered by new phone state
455    newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
456    checkA2dpSuspend();
457    checkOutputForAllStrategies();
458    updateDevicesAndOutputs();
459
460    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
461
462    // force routing command to audio hardware when ending call
463    // even if no device change is needed
464    if (isStateInCall(oldState) && newDevice == AUDIO_DEVICE_NONE) {
465        newDevice = hwOutputDesc->device();
466    }
467
468    int delayMs = 0;
469    if (isStateInCall(state)) {
470        nsecs_t sysTime = systemTime();
471        for (size_t i = 0; i < mOutputs.size(); i++) {
472            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
473            // mute media and sonification strategies and delay device switch by the largest
474            // latency of any output where either strategy is active.
475            // This avoid sending the ring tone or music tail into the earpiece or headset.
476            if ((desc->isStrategyActive(STRATEGY_MEDIA,
477                                     SONIFICATION_HEADSET_MUSIC_DELAY,
478                                     sysTime) ||
479                    desc->isStrategyActive(STRATEGY_SONIFICATION,
480                                         SONIFICATION_HEADSET_MUSIC_DELAY,
481                                         sysTime)) &&
482                    (delayMs < (int)desc->mLatency*2)) {
483                delayMs = desc->mLatency*2;
484            }
485            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
486            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
487                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
488            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
489            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
490                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
491        }
492    }
493
494    // change routing is necessary
495    setOutputDevice(mPrimaryOutput, newDevice, force, delayMs);
496
497    // if entering in call state, handle special case of active streams
498    // pertaining to sonification strategy see handleIncallSonification()
499    if (isStateInCall(state)) {
500        ALOGV("setPhoneState() in call state management: new state is %d", state);
501        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
502            handleIncallSonification((audio_stream_type_t)stream, true, true);
503        }
504    }
505
506    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
507    if (state == AUDIO_MODE_RINGTONE &&
508        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
509        mLimitRingtoneVolume = true;
510    } else {
511        mLimitRingtoneVolume = false;
512    }
513}
514
515void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
516                                         audio_policy_forced_cfg_t config)
517{
518    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
519
520    bool forceVolumeReeval = false;
521    switch(usage) {
522    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
523        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
524            config != AUDIO_POLICY_FORCE_NONE) {
525            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
526            return;
527        }
528        forceVolumeReeval = true;
529        mForceUse[usage] = config;
530        break;
531    case AUDIO_POLICY_FORCE_FOR_MEDIA:
532        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
533            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
534            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
535            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
536            config != AUDIO_POLICY_FORCE_NO_BT_A2DP) {
537            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
538            return;
539        }
540        mForceUse[usage] = config;
541        break;
542    case AUDIO_POLICY_FORCE_FOR_RECORD:
543        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
544            config != AUDIO_POLICY_FORCE_NONE) {
545            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
546            return;
547        }
548        mForceUse[usage] = config;
549        break;
550    case AUDIO_POLICY_FORCE_FOR_DOCK:
551        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
552            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
553            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
554            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
555            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
556            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
557        }
558        forceVolumeReeval = true;
559        mForceUse[usage] = config;
560        break;
561    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
562        if (config != AUDIO_POLICY_FORCE_NONE &&
563            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
564            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
565        }
566        forceVolumeReeval = true;
567        mForceUse[usage] = config;
568        break;
569    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
570        if (config != AUDIO_POLICY_FORCE_NONE &&
571            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
572            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
573        }
574        mForceUse[usage] = config;
575        break;
576    default:
577        ALOGW("setForceUse() invalid usage %d", usage);
578        break;
579    }
580
581    // check for device and output changes triggered by new force usage
582    checkA2dpSuspend();
583    checkOutputForAllStrategies();
584    updateDevicesAndOutputs();
585    for (size_t i = 0; i < mOutputs.size(); i++) {
586        audio_io_handle_t output = mOutputs.keyAt(i);
587        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
588        setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
589        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
590            applyStreamVolumes(output, newDevice, 0, true);
591        }
592    }
593
594    audio_io_handle_t activeInput = getActiveInput();
595    if (activeInput != 0) {
596        setInputDevice(activeInput, getNewInputDevice(activeInput));
597    }
598
599}
600
601audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
602{
603    return mForceUse[usage];
604}
605
606void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
607{
608    ALOGV("setSystemProperty() property %s, value %s", property, value);
609}
610
611// Find a direct output profile compatible with the parameters passed, even if the input flags do
612// not explicitly request a direct output
613sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
614                                                               audio_devices_t device,
615                                                               uint32_t samplingRate,
616                                                               audio_format_t format,
617                                                               audio_channel_mask_t channelMask,
618                                                               audio_output_flags_t flags)
619{
620    for (size_t i = 0; i < mHwModules.size(); i++) {
621        if (mHwModules[i]->mHandle == 0) {
622            continue;
623        }
624        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
625            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
626            bool found = profile->isCompatibleProfile(device, samplingRate,
627                    NULL /*updatedSamplingRate*/, format, channelMask,
628                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
629                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
630            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
631                return profile;
632            }
633        }
634    }
635    return 0;
636}
637
638audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
639                                    uint32_t samplingRate,
640                                    audio_format_t format,
641                                    audio_channel_mask_t channelMask,
642                                    audio_output_flags_t flags,
643                                    const audio_offload_info_t *offloadInfo)
644{
645
646    routing_strategy strategy = getStrategy(stream);
647    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
648    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
649          device, stream, samplingRate, format, channelMask, flags);
650
651    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
652            offloadInfo);
653}
654
655audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
656                                    uint32_t samplingRate,
657                                    audio_format_t format,
658                                    audio_channel_mask_t channelMask,
659                                    audio_output_flags_t flags,
660                                    const audio_offload_info_t *offloadInfo)
661{
662    if (attr == NULL) {
663        ALOGE("getOutputForAttr() called with NULL audio attributes");
664        return 0;
665    }
666    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s",
667            attr->usage, attr->content_type, attr->tags);
668
669    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
670    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
671    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
672    ALOGV("getOutputForAttr() device %d, samplingRate %d, format %x, channelMask %x, flags %x",
673          device, samplingRate, format, channelMask, flags);
674
675    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
676    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
677                offloadInfo);
678}
679
680audio_io_handle_t AudioPolicyManager::getOutputForDevice(
681        audio_devices_t device,
682        audio_stream_type_t stream,
683        uint32_t samplingRate,
684        audio_format_t format,
685        audio_channel_mask_t channelMask,
686        audio_output_flags_t flags,
687        const audio_offload_info_t *offloadInfo)
688{
689    audio_io_handle_t output = 0;
690    uint32_t latency = 0;
691
692#ifdef AUDIO_POLICY_TEST
693    if (mCurOutput != 0) {
694        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
695                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
696
697        if (mTestOutputs[mCurOutput] == 0) {
698            ALOGV("getOutput() opening test output");
699            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
700            outputDesc->mDevice = mTestDevice;
701            outputDesc->mSamplingRate = mTestSamplingRate;
702            outputDesc->mFormat = mTestFormat;
703            outputDesc->mChannelMask = mTestChannels;
704            outputDesc->mLatency = mTestLatencyMs;
705            outputDesc->mFlags =
706                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
707            outputDesc->mRefCount[stream] = 0;
708            mTestOutputs[mCurOutput] = mpClientInterface->openOutput(0, &outputDesc->mDevice,
709                                            &outputDesc->mSamplingRate,
710                                            &outputDesc->mFormat,
711                                            &outputDesc->mChannelMask,
712                                            &outputDesc->mLatency,
713                                            outputDesc->mFlags,
714                                            offloadInfo);
715            if (mTestOutputs[mCurOutput]) {
716                AudioParameter outputCmd = AudioParameter();
717                outputCmd.addInt(String8("set_id"),mCurOutput);
718                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
719                addOutput(mTestOutputs[mCurOutput], outputDesc);
720            }
721        }
722        return mTestOutputs[mCurOutput];
723    }
724#endif //AUDIO_POLICY_TEST
725
726    // open a direct output if required by specified parameters
727    //force direct flag if offload flag is set: offloading implies a direct output stream
728    // and all common behaviors are driven by checking only the direct flag
729    // this should normally be set appropriately in the policy configuration file
730    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
731        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
732    }
733
734    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
735    // creating an offloaded track and tearing it down immediately after start when audioflinger
736    // detects there is an active non offloadable effect.
737    // FIXME: We should check the audio session here but we do not have it in this context.
738    // This may prevent offloading in rare situations where effects are left active by apps
739    // in the background.
740    sp<IOProfile> profile;
741    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
742            !isNonOffloadableEffectEnabled()) {
743        profile = getProfileForDirectOutput(device,
744                                           samplingRate,
745                                           format,
746                                           channelMask,
747                                           (audio_output_flags_t)flags);
748    }
749
750    if (profile != 0) {
751        sp<AudioOutputDescriptor> outputDesc = NULL;
752
753        for (size_t i = 0; i < mOutputs.size(); i++) {
754            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
755            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
756                outputDesc = desc;
757                // reuse direct output if currently open and configured with same parameters
758                if ((samplingRate == outputDesc->mSamplingRate) &&
759                        (format == outputDesc->mFormat) &&
760                        (channelMask == outputDesc->mChannelMask)) {
761                    outputDesc->mDirectOpenCount++;
762                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
763                    return mOutputs.keyAt(i);
764                }
765            }
766        }
767        // close direct output if currently open and configured with different parameters
768        if (outputDesc != NULL) {
769            closeOutput(outputDesc->mIoHandle);
770        }
771        outputDesc = new AudioOutputDescriptor(profile);
772        outputDesc->mDevice = device;
773        outputDesc->mSamplingRate = samplingRate;
774        outputDesc->mFormat = format;
775        outputDesc->mChannelMask = channelMask;
776        outputDesc->mLatency = 0;
777        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
778        outputDesc->mRefCount[stream] = 0;
779        outputDesc->mStopTime[stream] = 0;
780        outputDesc->mDirectOpenCount = 1;
781        output = mpClientInterface->openOutput(profile->mModule->mHandle,
782                                        &outputDesc->mDevice,
783                                        &outputDesc->mSamplingRate,
784                                        &outputDesc->mFormat,
785                                        &outputDesc->mChannelMask,
786                                        &outputDesc->mLatency,
787                                        outputDesc->mFlags,
788                                        offloadInfo);
789
790        // only accept an output with the requested parameters
791        if (output == 0 ||
792            (samplingRate != 0 && samplingRate != outputDesc->mSamplingRate) ||
793            (format != AUDIO_FORMAT_DEFAULT && format != outputDesc->mFormat) ||
794            (channelMask != 0 && channelMask != outputDesc->mChannelMask)) {
795            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
796                    "format %d %d, channelMask %04x %04x", output, samplingRate,
797                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
798                    outputDesc->mChannelMask);
799            if (output != 0) {
800                mpClientInterface->closeOutput(output);
801            }
802            return 0;
803        }
804        audio_io_handle_t srcOutput = getOutputForEffect();
805        addOutput(output, outputDesc);
806        audio_io_handle_t dstOutput = getOutputForEffect();
807        if (dstOutput == output) {
808            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
809        }
810        mPreviousOutputs = mOutputs;
811        ALOGV("getOutput() returns new direct output %d", output);
812        mpClientInterface->onAudioPortListUpdate();
813        return output;
814    }
815
816    // ignoring channel mask due to downmix capability in mixer
817
818    // open a non direct output
819
820    // for non direct outputs, only PCM is supported
821    if (audio_is_linear_pcm(format)) {
822        // get which output is suitable for the specified stream. The actual
823        // routing change will happen when startOutput() will be called
824        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
825
826        output = selectOutput(outputs, flags);
827    }
828    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
829            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
830
831    ALOGV("getOutput() returns output %d", output);
832
833    return output;
834}
835
836audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
837                                                       audio_output_flags_t flags)
838{
839    // select one output among several that provide a path to a particular device or set of
840    // devices (the list was previously build by getOutputsForDevice()).
841    // The priority is as follows:
842    // 1: the output with the highest number of requested policy flags
843    // 2: the primary output
844    // 3: the first output in the list
845
846    if (outputs.size() == 0) {
847        return 0;
848    }
849    if (outputs.size() == 1) {
850        return outputs[0];
851    }
852
853    int maxCommonFlags = 0;
854    audio_io_handle_t outputFlags = 0;
855    audio_io_handle_t outputPrimary = 0;
856
857    for (size_t i = 0; i < outputs.size(); i++) {
858        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
859        if (!outputDesc->isDuplicated()) {
860            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
861            if (commonFlags > maxCommonFlags) {
862                outputFlags = outputs[i];
863                maxCommonFlags = commonFlags;
864                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
865            }
866            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
867                outputPrimary = outputs[i];
868            }
869        }
870    }
871
872    if (outputFlags != 0) {
873        return outputFlags;
874    }
875    if (outputPrimary != 0) {
876        return outputPrimary;
877    }
878
879    return outputs[0];
880}
881
882status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
883                                             audio_stream_type_t stream,
884                                             int session)
885{
886    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
887    ssize_t index = mOutputs.indexOfKey(output);
888    if (index < 0) {
889        ALOGW("startOutput() unknown output %d", output);
890        return BAD_VALUE;
891    }
892
893    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
894
895    // increment usage count for this stream on the requested output:
896    // NOTE that the usage count is the same for duplicated output and hardware output which is
897    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
898    outputDesc->changeRefCount(stream, 1);
899
900    if (outputDesc->mRefCount[stream] == 1) {
901        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
902        routing_strategy strategy = getStrategy(stream);
903        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
904                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
905        uint32_t waitMs = 0;
906        bool force = false;
907        for (size_t i = 0; i < mOutputs.size(); i++) {
908            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
909            if (desc != outputDesc) {
910                // force a device change if any other output is managed by the same hw
911                // module and has a current device selection that differs from selected device.
912                // In this case, the audio HAL must receive the new device selection so that it can
913                // change the device currently selected by the other active output.
914                if (outputDesc->sharesHwModuleWith(desc) &&
915                    desc->device() != newDevice) {
916                    force = true;
917                }
918                // wait for audio on other active outputs to be presented when starting
919                // a notification so that audio focus effect can propagate.
920                uint32_t latency = desc->latency();
921                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
922                    waitMs = latency;
923                }
924            }
925        }
926        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
927
928        // handle special case for sonification while in call
929        if (isInCall()) {
930            handleIncallSonification(stream, true, false);
931        }
932
933        // apply volume rules for current stream and device if necessary
934        checkAndSetVolume(stream,
935                          mStreams[stream].getVolumeIndex(newDevice),
936                          output,
937                          newDevice);
938
939        // update the outputs if starting an output with a stream that can affect notification
940        // routing
941        handleNotificationRoutingForStream(stream);
942        if (waitMs > muteWaitMs) {
943            usleep((waitMs - muteWaitMs) * 2 * 1000);
944        }
945    }
946    return NO_ERROR;
947}
948
949
950status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
951                                            audio_stream_type_t stream,
952                                            int session)
953{
954    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
955    ssize_t index = mOutputs.indexOfKey(output);
956    if (index < 0) {
957        ALOGW("stopOutput() unknown output %d", output);
958        return BAD_VALUE;
959    }
960
961    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
962
963    // handle special case for sonification while in call
964    if (isInCall()) {
965        handleIncallSonification(stream, false, false);
966    }
967
968    if (outputDesc->mRefCount[stream] > 0) {
969        // decrement usage count of this stream on the output
970        outputDesc->changeRefCount(stream, -1);
971        // store time at which the stream was stopped - see isStreamActive()
972        if (outputDesc->mRefCount[stream] == 0) {
973            outputDesc->mStopTime[stream] = systemTime();
974            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
975            // delay the device switch by twice the latency because stopOutput() is executed when
976            // the track stop() command is received and at that time the audio track buffer can
977            // still contain data that needs to be drained. The latency only covers the audio HAL
978            // and kernel buffers. Also the latency does not always include additional delay in the
979            // audio path (audio DSP, CODEC ...)
980            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
981
982            // force restoring the device selection on other active outputs if it differs from the
983            // one being selected for this output
984            for (size_t i = 0; i < mOutputs.size(); i++) {
985                audio_io_handle_t curOutput = mOutputs.keyAt(i);
986                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
987                if (curOutput != output &&
988                        desc->isActive() &&
989                        outputDesc->sharesHwModuleWith(desc) &&
990                        (newDevice != desc->device())) {
991                    setOutputDevice(curOutput,
992                                    getNewOutputDevice(curOutput, false /*fromCache*/),
993                                    true,
994                                    outputDesc->mLatency*2);
995                }
996            }
997            // update the outputs if stopping one with a stream that can affect notification routing
998            handleNotificationRoutingForStream(stream);
999        }
1000        return NO_ERROR;
1001    } else {
1002        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1003        return INVALID_OPERATION;
1004    }
1005}
1006
1007void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1008{
1009    ALOGV("releaseOutput() %d", output);
1010    ssize_t index = mOutputs.indexOfKey(output);
1011    if (index < 0) {
1012        ALOGW("releaseOutput() releasing unknown output %d", output);
1013        return;
1014    }
1015
1016#ifdef AUDIO_POLICY_TEST
1017    int testIndex = testOutputIndex(output);
1018    if (testIndex != 0) {
1019        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1020        if (outputDesc->isActive()) {
1021            mpClientInterface->closeOutput(output);
1022            mOutputs.removeItem(output);
1023            mTestOutputs[testIndex] = 0;
1024        }
1025        return;
1026    }
1027#endif //AUDIO_POLICY_TEST
1028
1029    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1030    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1031        if (desc->mDirectOpenCount <= 0) {
1032            ALOGW("releaseOutput() invalid open count %d for output %d",
1033                                                              desc->mDirectOpenCount, output);
1034            return;
1035        }
1036        if (--desc->mDirectOpenCount == 0) {
1037            closeOutput(output);
1038            // If effects where present on the output, audioflinger moved them to the primary
1039            // output by default: move them back to the appropriate output.
1040            audio_io_handle_t dstOutput = getOutputForEffect();
1041            if (dstOutput != mPrimaryOutput) {
1042                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1043            }
1044            mpClientInterface->onAudioPortListUpdate();
1045        }
1046    }
1047}
1048
1049
1050audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1051                                    uint32_t samplingRate,
1052                                    audio_format_t format,
1053                                    audio_channel_mask_t channelMask,
1054                                    audio_in_acoustics_t acoustics,
1055                                    audio_input_flags_t flags)
1056{
1057    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, acoustics %x, "
1058          "flags %#x",
1059          inputSource, samplingRate, format, channelMask, acoustics, flags);
1060
1061    audio_devices_t device = getDeviceForInputSource(inputSource);
1062
1063    if (device == AUDIO_DEVICE_NONE) {
1064        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1065        return 0;
1066    }
1067
1068    // adapt channel selection to input source
1069    switch (inputSource) {
1070    case AUDIO_SOURCE_VOICE_UPLINK:
1071        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1072        break;
1073    case AUDIO_SOURCE_VOICE_DOWNLINK:
1074        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1075        break;
1076    case AUDIO_SOURCE_VOICE_CALL:
1077        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1078        break;
1079    default:
1080        break;
1081    }
1082
1083    sp<IOProfile> profile = getInputProfile(device,
1084                                         samplingRate,
1085                                         format,
1086                                         channelMask,
1087                                         flags);
1088    if (profile == 0) {
1089        ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1090                "channelMask 0x%X, flags %#x",
1091                device, samplingRate, format, channelMask, flags);
1092        return 0;
1093    }
1094
1095    if (profile->mModule->mHandle == 0) {
1096        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1097        return 0;
1098    }
1099
1100    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1101
1102    inputDesc->mInputSource = inputSource;
1103    inputDesc->mDevice = device;
1104    inputDesc->mSamplingRate = samplingRate;
1105    inputDesc->mFormat = format;
1106    inputDesc->mChannelMask = channelMask;
1107    inputDesc->mRefCount = 0;
1108    inputDesc->mOpenRefCount = 1;
1109
1110    audio_io_handle_t input = mpClientInterface->openInput(profile->mModule->mHandle,
1111                                    &inputDesc->mDevice,
1112                                    &inputDesc->mSamplingRate,
1113                                    &inputDesc->mFormat,
1114                                    &inputDesc->mChannelMask,
1115                                    flags);
1116
1117    // only accept input with the exact requested set of parameters
1118    if (input == 0 ||
1119        (samplingRate != inputDesc->mSamplingRate) ||
1120        (format != inputDesc->mFormat) ||
1121        (channelMask != inputDesc->mChannelMask)) {
1122        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1123                samplingRate, format, channelMask);
1124        if (input != 0) {
1125            mpClientInterface->closeInput(input);
1126        }
1127        return 0;
1128    }
1129    addInput(input, inputDesc);
1130    mpClientInterface->onAudioPortListUpdate();
1131    return input;
1132}
1133
1134status_t AudioPolicyManager::startInput(audio_io_handle_t input)
1135{
1136    ALOGV("startInput() input %d", input);
1137    ssize_t index = mInputs.indexOfKey(input);
1138    if (index < 0) {
1139        ALOGW("startInput() unknown input %d", input);
1140        return BAD_VALUE;
1141    }
1142    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1143
1144    // virtual input devices are compatible with other input devices
1145    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1146
1147        // for a non-virtual input device, check if there is another (non-virtual) active input
1148        audio_io_handle_t activeInput = getActiveInput();
1149        if (activeInput != 0 && activeInput != input) {
1150
1151            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1152            // otherwise the active input continues and the new input cannot be started.
1153            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1154            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1155                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1156                stopInput(activeInput);
1157                releaseInput(activeInput);
1158            } else {
1159                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1160                return INVALID_OPERATION;
1161            }
1162        }
1163    }
1164
1165    if (inputDesc->mRefCount == 0) {
1166        setInputDevice(input, getNewInputDevice(input), true /* force */);
1167
1168        // Automatically enable the remote submix output when input is started.
1169        // For remote submix (a virtual device), we open only one input per capture request.
1170        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1171            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1172                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1173        }
1174    }
1175
1176    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1177
1178    inputDesc->mRefCount++;
1179    return NO_ERROR;
1180}
1181
1182status_t AudioPolicyManager::stopInput(audio_io_handle_t input)
1183{
1184    ALOGV("stopInput() input %d", input);
1185    ssize_t index = mInputs.indexOfKey(input);
1186    if (index < 0) {
1187        ALOGW("stopInput() unknown input %d", input);
1188        return BAD_VALUE;
1189    }
1190    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1191
1192    if (inputDesc->mRefCount == 0) {
1193        ALOGW("stopInput() input %d already stopped", input);
1194        return INVALID_OPERATION;
1195    }
1196
1197    inputDesc->mRefCount--;
1198    if (inputDesc->mRefCount == 0) {
1199
1200        // automatically disable the remote submix output when input is stopped
1201        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1202            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1203                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1204        }
1205
1206        resetInputDevice(input);
1207    }
1208    return NO_ERROR;
1209}
1210
1211void AudioPolicyManager::releaseInput(audio_io_handle_t input)
1212{
1213    ALOGV("releaseInput() %d", input);
1214    ssize_t index = mInputs.indexOfKey(input);
1215    if (index < 0) {
1216        ALOGW("releaseInput() releasing unknown input %d", input);
1217        return;
1218    }
1219    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1220    ALOG_ASSERT(inputDesc != 0);
1221    if (inputDesc->mOpenRefCount == 0) {
1222        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1223        return;
1224    }
1225    inputDesc->mOpenRefCount--;
1226    if (inputDesc->mOpenRefCount > 0) {
1227        ALOGV("releaseInput() exit > 0");
1228        return;
1229    }
1230
1231    mpClientInterface->closeInput(input);
1232    mInputs.removeItem(input);
1233    nextAudioPortGeneration();
1234    mpClientInterface->onAudioPortListUpdate();
1235    ALOGV("releaseInput() exit");
1236}
1237
1238void AudioPolicyManager::closeAllInputs() {
1239    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1240        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1241    }
1242    mInputs.clear();
1243    nextAudioPortGeneration();
1244}
1245
1246void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1247                                            int indexMin,
1248                                            int indexMax)
1249{
1250    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1251    if (indexMin < 0 || indexMin >= indexMax) {
1252        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1253        return;
1254    }
1255    mStreams[stream].mIndexMin = indexMin;
1256    mStreams[stream].mIndexMax = indexMax;
1257}
1258
1259status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1260                                                      int index,
1261                                                      audio_devices_t device)
1262{
1263
1264    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1265        return BAD_VALUE;
1266    }
1267    if (!audio_is_output_device(device)) {
1268        return BAD_VALUE;
1269    }
1270
1271    // Force max volume if stream cannot be muted
1272    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1273
1274    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1275          stream, device, index);
1276
1277    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1278    // clear all device specific values
1279    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1280        mStreams[stream].mIndexCur.clear();
1281    }
1282    mStreams[stream].mIndexCur.add(device, index);
1283
1284    // compute and apply stream volume on all outputs according to connected device
1285    status_t status = NO_ERROR;
1286    for (size_t i = 0; i < mOutputs.size(); i++) {
1287        audio_devices_t curDevice =
1288                getDeviceForVolume(mOutputs.valueAt(i)->device());
1289        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1290            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1291            if (volStatus != NO_ERROR) {
1292                status = volStatus;
1293            }
1294        }
1295    }
1296    return status;
1297}
1298
1299status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1300                                                      int *index,
1301                                                      audio_devices_t device)
1302{
1303    if (index == NULL) {
1304        return BAD_VALUE;
1305    }
1306    if (!audio_is_output_device(device)) {
1307        return BAD_VALUE;
1308    }
1309    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1310    // the strategy the stream belongs to.
1311    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1312        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1313    }
1314    device = getDeviceForVolume(device);
1315
1316    *index =  mStreams[stream].getVolumeIndex(device);
1317    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1318    return NO_ERROR;
1319}
1320
1321audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1322                                            const SortedVector<audio_io_handle_t>& outputs)
1323{
1324    // select one output among several suitable for global effects.
1325    // The priority is as follows:
1326    // 1: An offloaded output. If the effect ends up not being offloadable,
1327    //    AudioFlinger will invalidate the track and the offloaded output
1328    //    will be closed causing the effect to be moved to a PCM output.
1329    // 2: A deep buffer output
1330    // 3: the first output in the list
1331
1332    if (outputs.size() == 0) {
1333        return 0;
1334    }
1335
1336    audio_io_handle_t outputOffloaded = 0;
1337    audio_io_handle_t outputDeepBuffer = 0;
1338
1339    for (size_t i = 0; i < outputs.size(); i++) {
1340        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1341        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1342        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1343            outputOffloaded = outputs[i];
1344        }
1345        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1346            outputDeepBuffer = outputs[i];
1347        }
1348    }
1349
1350    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1351          outputOffloaded, outputDeepBuffer);
1352    if (outputOffloaded != 0) {
1353        return outputOffloaded;
1354    }
1355    if (outputDeepBuffer != 0) {
1356        return outputDeepBuffer;
1357    }
1358
1359    return outputs[0];
1360}
1361
1362audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1363{
1364    // apply simple rule where global effects are attached to the same output as MUSIC streams
1365
1366    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1367    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1368    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1369
1370    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1371    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1372          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1373
1374    return output;
1375}
1376
1377status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1378                                audio_io_handle_t io,
1379                                uint32_t strategy,
1380                                int session,
1381                                int id)
1382{
1383    ssize_t index = mOutputs.indexOfKey(io);
1384    if (index < 0) {
1385        index = mInputs.indexOfKey(io);
1386        if (index < 0) {
1387            ALOGW("registerEffect() unknown io %d", io);
1388            return INVALID_OPERATION;
1389        }
1390    }
1391
1392    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1393        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1394                desc->name, desc->memoryUsage);
1395        return INVALID_OPERATION;
1396    }
1397    mTotalEffectsMemory += desc->memoryUsage;
1398    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1399            desc->name, io, strategy, session, id);
1400    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1401
1402    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1403    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1404    effectDesc->mIo = io;
1405    effectDesc->mStrategy = (routing_strategy)strategy;
1406    effectDesc->mSession = session;
1407    effectDesc->mEnabled = false;
1408
1409    mEffects.add(id, effectDesc);
1410
1411    return NO_ERROR;
1412}
1413
1414status_t AudioPolicyManager::unregisterEffect(int id)
1415{
1416    ssize_t index = mEffects.indexOfKey(id);
1417    if (index < 0) {
1418        ALOGW("unregisterEffect() unknown effect ID %d", id);
1419        return INVALID_OPERATION;
1420    }
1421
1422    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1423
1424    setEffectEnabled(effectDesc, false);
1425
1426    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1427        ALOGW("unregisterEffect() memory %d too big for total %d",
1428                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1429        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1430    }
1431    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1432    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1433            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1434
1435    mEffects.removeItem(id);
1436
1437    return NO_ERROR;
1438}
1439
1440status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1441{
1442    ssize_t index = mEffects.indexOfKey(id);
1443    if (index < 0) {
1444        ALOGW("unregisterEffect() unknown effect ID %d", id);
1445        return INVALID_OPERATION;
1446    }
1447
1448    return setEffectEnabled(mEffects.valueAt(index), enabled);
1449}
1450
1451status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1452{
1453    if (enabled == effectDesc->mEnabled) {
1454        ALOGV("setEffectEnabled(%s) effect already %s",
1455             enabled?"true":"false", enabled?"enabled":"disabled");
1456        return INVALID_OPERATION;
1457    }
1458
1459    if (enabled) {
1460        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1461            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1462                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1463            return INVALID_OPERATION;
1464        }
1465        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1466        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1467    } else {
1468        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1469            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1470                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1471            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1472        }
1473        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1474        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1475    }
1476    effectDesc->mEnabled = enabled;
1477    return NO_ERROR;
1478}
1479
1480bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1481{
1482    for (size_t i = 0; i < mEffects.size(); i++) {
1483        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1484        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1485                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1486            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1487                  effectDesc->mDesc.name, effectDesc->mSession);
1488            return true;
1489        }
1490    }
1491    return false;
1492}
1493
1494bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1495{
1496    nsecs_t sysTime = systemTime();
1497    for (size_t i = 0; i < mOutputs.size(); i++) {
1498        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1499        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1500            return true;
1501        }
1502    }
1503    return false;
1504}
1505
1506bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1507                                                    uint32_t inPastMs) const
1508{
1509    nsecs_t sysTime = systemTime();
1510    for (size_t i = 0; i < mOutputs.size(); i++) {
1511        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1512        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1513                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1514            return true;
1515        }
1516    }
1517    return false;
1518}
1519
1520bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1521{
1522    for (size_t i = 0; i < mInputs.size(); i++) {
1523        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1524        if ((inputDescriptor->mInputSource == (int)source ||
1525                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1526                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1527             && (inputDescriptor->mRefCount > 0)) {
1528            return true;
1529        }
1530    }
1531    return false;
1532}
1533
1534
1535status_t AudioPolicyManager::dump(int fd)
1536{
1537    const size_t SIZE = 256;
1538    char buffer[SIZE];
1539    String8 result;
1540
1541    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1542    result.append(buffer);
1543
1544    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1545    result.append(buffer);
1546    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1547    result.append(buffer);
1548    snprintf(buffer, SIZE, " Force use for communications %d\n",
1549             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1550    result.append(buffer);
1551    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1552    result.append(buffer);
1553    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1554    result.append(buffer);
1555    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1556    result.append(buffer);
1557    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1558    result.append(buffer);
1559    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1560            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1561    result.append(buffer);
1562
1563    snprintf(buffer, SIZE, " Available output devices:\n");
1564    result.append(buffer);
1565    write(fd, result.string(), result.size());
1566    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1567        mAvailableOutputDevices[i]->dump(fd, 2, i);
1568    }
1569    snprintf(buffer, SIZE, "\n Available input devices:\n");
1570    write(fd, buffer, strlen(buffer));
1571    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1572        mAvailableInputDevices[i]->dump(fd, 2, i);
1573    }
1574
1575    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1576    write(fd, buffer, strlen(buffer));
1577    for (size_t i = 0; i < mHwModules.size(); i++) {
1578        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1579        write(fd, buffer, strlen(buffer));
1580        mHwModules[i]->dump(fd);
1581    }
1582
1583    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1584    write(fd, buffer, strlen(buffer));
1585    for (size_t i = 0; i < mOutputs.size(); i++) {
1586        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1587        write(fd, buffer, strlen(buffer));
1588        mOutputs.valueAt(i)->dump(fd);
1589    }
1590
1591    snprintf(buffer, SIZE, "\nInputs dump:\n");
1592    write(fd, buffer, strlen(buffer));
1593    for (size_t i = 0; i < mInputs.size(); i++) {
1594        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1595        write(fd, buffer, strlen(buffer));
1596        mInputs.valueAt(i)->dump(fd);
1597    }
1598
1599    snprintf(buffer, SIZE, "\nStreams dump:\n");
1600    write(fd, buffer, strlen(buffer));
1601    snprintf(buffer, SIZE,
1602             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1603    write(fd, buffer, strlen(buffer));
1604    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1605        snprintf(buffer, SIZE, " %02zu      ", i);
1606        write(fd, buffer, strlen(buffer));
1607        mStreams[i].dump(fd);
1608    }
1609
1610    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1611            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1612    write(fd, buffer, strlen(buffer));
1613
1614    snprintf(buffer, SIZE, "Registered effects:\n");
1615    write(fd, buffer, strlen(buffer));
1616    for (size_t i = 0; i < mEffects.size(); i++) {
1617        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1618        write(fd, buffer, strlen(buffer));
1619        mEffects.valueAt(i)->dump(fd);
1620    }
1621
1622
1623    return NO_ERROR;
1624}
1625
1626// This function checks for the parameters which can be offloaded.
1627// This can be enhanced depending on the capability of the DSP and policy
1628// of the system.
1629bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1630{
1631    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1632     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1633     offloadInfo.sample_rate, offloadInfo.channel_mask,
1634     offloadInfo.format,
1635     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1636     offloadInfo.has_video);
1637
1638    // Check if offload has been disabled
1639    char propValue[PROPERTY_VALUE_MAX];
1640    if (property_get("audio.offload.disable", propValue, "0")) {
1641        if (atoi(propValue) != 0) {
1642            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1643            return false;
1644        }
1645    }
1646
1647    // Check if stream type is music, then only allow offload as of now.
1648    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1649    {
1650        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1651        return false;
1652    }
1653
1654    //TODO: enable audio offloading with video when ready
1655    if (offloadInfo.has_video)
1656    {
1657        ALOGV("isOffloadSupported: has_video == true, returning false");
1658        return false;
1659    }
1660
1661    //If duration is less than minimum value defined in property, return false
1662    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1663        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1664            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1665            return false;
1666        }
1667    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1668        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1669        return false;
1670    }
1671
1672    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1673    // creating an offloaded track and tearing it down immediately after start when audioflinger
1674    // detects there is an active non offloadable effect.
1675    // FIXME: We should check the audio session here but we do not have it in this context.
1676    // This may prevent offloading in rare situations where effects are left active by apps
1677    // in the background.
1678    if (isNonOffloadableEffectEnabled()) {
1679        return false;
1680    }
1681
1682    // See if there is a profile to support this.
1683    // AUDIO_DEVICE_NONE
1684    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1685                                            offloadInfo.sample_rate,
1686                                            offloadInfo.format,
1687                                            offloadInfo.channel_mask,
1688                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1689    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1690    return (profile != 0);
1691}
1692
1693status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1694                                            audio_port_type_t type,
1695                                            unsigned int *num_ports,
1696                                            struct audio_port *ports,
1697                                            unsigned int *generation)
1698{
1699    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1700            generation == NULL) {
1701        return BAD_VALUE;
1702    }
1703    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1704    if (ports == NULL) {
1705        *num_ports = 0;
1706    }
1707
1708    size_t portsWritten = 0;
1709    size_t portsMax = *num_ports;
1710    *num_ports = 0;
1711    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1712        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1713            for (size_t i = 0;
1714                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1715                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1716            }
1717            *num_ports += mAvailableOutputDevices.size();
1718        }
1719        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1720            for (size_t i = 0;
1721                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1722                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1723            }
1724            *num_ports += mAvailableInputDevices.size();
1725        }
1726    }
1727    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1728        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1729            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1730                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1731            }
1732            *num_ports += mInputs.size();
1733        }
1734        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1735            size_t numOutputs = 0;
1736            for (size_t i = 0; i < mOutputs.size(); i++) {
1737                if (!mOutputs[i]->isDuplicated()) {
1738                    numOutputs++;
1739                    if (portsWritten < portsMax) {
1740                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
1741                    }
1742                }
1743            }
1744            *num_ports += numOutputs;
1745        }
1746    }
1747    *generation = curAudioPortGeneration();
1748    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
1749    return NO_ERROR;
1750}
1751
1752status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
1753{
1754    return NO_ERROR;
1755}
1756
1757sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
1758                                                                    audio_port_handle_t id) const
1759{
1760    sp<AudioOutputDescriptor> outputDesc = NULL;
1761    for (size_t i = 0; i < mOutputs.size(); i++) {
1762        outputDesc = mOutputs.valueAt(i);
1763        if (outputDesc->mId == id) {
1764            break;
1765        }
1766    }
1767    return outputDesc;
1768}
1769
1770sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
1771                                                                    audio_port_handle_t id) const
1772{
1773    sp<AudioInputDescriptor> inputDesc = NULL;
1774    for (size_t i = 0; i < mInputs.size(); i++) {
1775        inputDesc = mInputs.valueAt(i);
1776        if (inputDesc->mId == id) {
1777            break;
1778        }
1779    }
1780    return inputDesc;
1781}
1782
1783sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
1784                                                                    audio_devices_t device) const
1785{
1786    sp <HwModule> module;
1787
1788    for (size_t i = 0; i < mHwModules.size(); i++) {
1789        if (mHwModules[i]->mHandle == 0) {
1790            continue;
1791        }
1792        if (audio_is_output_device(device)) {
1793            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1794            {
1795                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
1796                    return mHwModules[i];
1797                }
1798            }
1799        } else {
1800            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
1801                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
1802                        device & ~AUDIO_DEVICE_BIT_IN) {
1803                    return mHwModules[i];
1804                }
1805            }
1806        }
1807    }
1808    return module;
1809}
1810
1811sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
1812{
1813    sp <HwModule> module;
1814
1815    for (size_t i = 0; i < mHwModules.size(); i++)
1816    {
1817        if (strcmp(mHwModules[i]->mName, name) == 0) {
1818            return mHwModules[i];
1819        }
1820    }
1821    return module;
1822}
1823
1824
1825status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
1826                                               audio_patch_handle_t *handle,
1827                                               uid_t uid)
1828{
1829    ALOGV("createAudioPatch()");
1830
1831    if (handle == NULL || patch == NULL) {
1832        return BAD_VALUE;
1833    }
1834    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
1835
1836    if (patch->num_sources > 1 || patch->num_sinks > 1) {
1837        return INVALID_OPERATION;
1838    }
1839    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE ||
1840            patch->sinks[0].role != AUDIO_PORT_ROLE_SINK) {
1841        return INVALID_OPERATION;
1842    }
1843
1844    sp<AudioPatch> patchDesc;
1845    ssize_t index = mAudioPatches.indexOfKey(*handle);
1846
1847    ALOGV("createAudioPatch sink id %d role %d type %d", patch->sinks[0].id, patch->sinks[0].role,
1848                                                         patch->sinks[0].type);
1849    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
1850                                                           patch->sources[0].role,
1851                                                           patch->sources[0].type);
1852
1853    if (index >= 0) {
1854        patchDesc = mAudioPatches.valueAt(index);
1855        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
1856                                                                  mUidCached, patchDesc->mUid, uid);
1857        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
1858            return INVALID_OPERATION;
1859        }
1860    } else {
1861        *handle = 0;
1862    }
1863
1864    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
1865        // TODO add support for mix to mix connection
1866        if (patch->sinks[0].type != AUDIO_PORT_TYPE_DEVICE) {
1867            ALOGV("createAudioPatch() source mix sink not device");
1868            return BAD_VALUE;
1869        }
1870        // output mix to output device connection
1871        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
1872        if (outputDesc == NULL) {
1873            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
1874            return BAD_VALUE;
1875        }
1876        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
1877                                                outputDesc->mIoHandle);
1878        if (patchDesc != 0) {
1879            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
1880                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
1881                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
1882                return BAD_VALUE;
1883            }
1884        }
1885        sp<DeviceDescriptor> devDesc =
1886                mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
1887        if (devDesc == 0) {
1888            ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[0].id);
1889            return BAD_VALUE;
1890        }
1891
1892        if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
1893                                                       patch->sources[0].sample_rate,
1894                                                     NULL,  // updatedSamplingRate
1895                                                     patch->sources[0].format,
1896                                                     patch->sources[0].channel_mask,
1897                                                     AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
1898            ALOGV("createAudioPatch() profile not supported");
1899            return INVALID_OPERATION;
1900        }
1901        // TODO: reconfigure output format and channels here
1902        ALOGV("createAudioPatch() setting device %08x on output %d",
1903                                              devDesc->mDeviceType, outputDesc->mIoHandle);
1904        setOutputDevice(outputDesc->mIoHandle,
1905                        devDesc->mDeviceType,
1906                       true,
1907                       0,
1908                       handle);
1909        index = mAudioPatches.indexOfKey(*handle);
1910        if (index >= 0) {
1911            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
1912                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
1913            }
1914            patchDesc = mAudioPatches.valueAt(index);
1915            patchDesc->mUid = uid;
1916            ALOGV("createAudioPatch() success");
1917        } else {
1918            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
1919            return INVALID_OPERATION;
1920        }
1921    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
1922        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
1923            // input device to input mix connection
1924            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
1925            if (inputDesc == NULL) {
1926                return BAD_VALUE;
1927            }
1928            if (patchDesc != 0) {
1929                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
1930                    return BAD_VALUE;
1931                }
1932            }
1933            sp<DeviceDescriptor> devDesc =
1934                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
1935            if (devDesc == 0) {
1936                return BAD_VALUE;
1937            }
1938
1939            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
1940                                                         patch->sinks[0].sample_rate,
1941                                                         NULL, /*updatedSampleRate*/
1942                                                         patch->sinks[0].format,
1943                                                         patch->sinks[0].channel_mask,
1944                                                         // FIXME for the parameter type,
1945                                                         // and the NONE
1946                                                         (audio_output_flags_t)
1947                                                            AUDIO_INPUT_FLAG_NONE)) {
1948                return INVALID_OPERATION;
1949            }
1950            // TODO: reconfigure output format and channels here
1951            ALOGV("createAudioPatch() setting device %08x on output %d",
1952                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
1953            setInputDevice(inputDesc->mIoHandle,
1954                           devDesc->mDeviceType,
1955                           true,
1956                           handle);
1957            index = mAudioPatches.indexOfKey(*handle);
1958            if (index >= 0) {
1959                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
1960                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
1961                }
1962                patchDesc = mAudioPatches.valueAt(index);
1963                patchDesc->mUid = uid;
1964                ALOGV("createAudioPatch() success");
1965            } else {
1966                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
1967                return INVALID_OPERATION;
1968            }
1969        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
1970            // device to device connection
1971            if (patchDesc != 0) {
1972                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id &&
1973                    patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
1974                    return BAD_VALUE;
1975                }
1976            }
1977
1978            sp<DeviceDescriptor> srcDeviceDesc =
1979                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
1980            sp<DeviceDescriptor> sinkDeviceDesc =
1981                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
1982            if (srcDeviceDesc == 0 || sinkDeviceDesc == 0) {
1983                return BAD_VALUE;
1984            }
1985            //update source and sink with our own data as the data passed in the patch may
1986            // be incomplete.
1987            struct audio_patch newPatch = *patch;
1988            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
1989            sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[0], &patch->sinks[0]);
1990
1991            if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
1992                SortedVector<audio_io_handle_t> outputs =
1993                                        getOutputsForDevice(sinkDeviceDesc->mDeviceType, mOutputs);
1994                // if the sink device is reachable via an opened output stream, request to go via
1995                // this output stream by adding a second source to the patch description
1996                audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
1997                if (output != AUDIO_IO_HANDLE_NONE) {
1998                    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
1999                    if (outputDesc->isDuplicated()) {
2000                        return INVALID_OPERATION;
2001                    }
2002                    outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2003                    newPatch.num_sources = 2;
2004                }
2005            }
2006            // TODO: check from routing capabilities in config file and other conflicting patches
2007
2008            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2009            if (index >= 0) {
2010                afPatchHandle = patchDesc->mAfPatchHandle;
2011            }
2012
2013            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2014                                                                  &afPatchHandle,
2015                                                                  0);
2016            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2017                                                                  status, afPatchHandle);
2018            if (status == NO_ERROR) {
2019                if (index < 0) {
2020                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2021                                               &newPatch, uid);
2022                    addAudioPatch(patchDesc->mHandle, patchDesc);
2023                } else {
2024                    patchDesc->mPatch = newPatch;
2025                }
2026                patchDesc->mAfPatchHandle = afPatchHandle;
2027                *handle = patchDesc->mHandle;
2028                nextAudioPortGeneration();
2029                mpClientInterface->onAudioPatchListUpdate();
2030            } else {
2031                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2032                status);
2033                return INVALID_OPERATION;
2034            }
2035        } else {
2036            return BAD_VALUE;
2037        }
2038    } else {
2039        return BAD_VALUE;
2040    }
2041    return NO_ERROR;
2042}
2043
2044status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2045                                                  uid_t uid)
2046{
2047    ALOGV("releaseAudioPatch() patch %d", handle);
2048
2049    ssize_t index = mAudioPatches.indexOfKey(handle);
2050
2051    if (index < 0) {
2052        return BAD_VALUE;
2053    }
2054    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2055    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2056          mUidCached, patchDesc->mUid, uid);
2057    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2058        return INVALID_OPERATION;
2059    }
2060
2061    struct audio_patch *patch = &patchDesc->mPatch;
2062    patchDesc->mUid = mUidCached;
2063    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2064        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2065        if (outputDesc == NULL) {
2066            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2067            return BAD_VALUE;
2068        }
2069
2070        setOutputDevice(outputDesc->mIoHandle,
2071                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2072                       true,
2073                       0,
2074                       NULL);
2075    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2076        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2077            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2078            if (inputDesc == NULL) {
2079                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2080                return BAD_VALUE;
2081            }
2082            setInputDevice(inputDesc->mIoHandle,
2083                           getNewInputDevice(inputDesc->mIoHandle),
2084                           true,
2085                           NULL);
2086        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2087            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2088            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2089            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2090                                                              status, patchDesc->mAfPatchHandle);
2091            removeAudioPatch(patchDesc->mHandle);
2092            nextAudioPortGeneration();
2093            mpClientInterface->onAudioPatchListUpdate();
2094        } else {
2095            return BAD_VALUE;
2096        }
2097    } else {
2098        return BAD_VALUE;
2099    }
2100    return NO_ERROR;
2101}
2102
2103status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2104                                              struct audio_patch *patches,
2105                                              unsigned int *generation)
2106{
2107    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2108            generation == NULL) {
2109        return BAD_VALUE;
2110    }
2111    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2112          *num_patches, patches, mAudioPatches.size());
2113    if (patches == NULL) {
2114        *num_patches = 0;
2115    }
2116
2117    size_t patchesWritten = 0;
2118    size_t patchesMax = *num_patches;
2119    for (size_t i = 0;
2120            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2121        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2122        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2123        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2124              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2125    }
2126    *num_patches = mAudioPatches.size();
2127
2128    *generation = curAudioPortGeneration();
2129    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2130    return NO_ERROR;
2131}
2132
2133status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2134{
2135    ALOGV("setAudioPortConfig()");
2136
2137    if (config == NULL) {
2138        return BAD_VALUE;
2139    }
2140    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2141    // Only support gain configuration for now
2142    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2143        return INVALID_OPERATION;
2144    }
2145
2146    sp<AudioPortConfig> audioPortConfig;
2147    if (config->type == AUDIO_PORT_TYPE_MIX) {
2148        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2149            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2150            if (outputDesc == NULL) {
2151                return BAD_VALUE;
2152            }
2153            ALOG_ASSERT(!outputDesc->isDuplicated(),
2154                        "setAudioPortConfig() called on duplicated output %d",
2155                        outputDesc->mIoHandle);
2156            audioPortConfig = outputDesc;
2157        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2158            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2159            if (inputDesc == NULL) {
2160                return BAD_VALUE;
2161            }
2162            audioPortConfig = inputDesc;
2163        } else {
2164            return BAD_VALUE;
2165        }
2166    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2167        sp<DeviceDescriptor> deviceDesc;
2168        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2169            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2170        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2171            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2172        } else {
2173            return BAD_VALUE;
2174        }
2175        if (deviceDesc == NULL) {
2176            return BAD_VALUE;
2177        }
2178        audioPortConfig = deviceDesc;
2179    } else {
2180        return BAD_VALUE;
2181    }
2182
2183    struct audio_port_config backupConfig;
2184    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2185    if (status == NO_ERROR) {
2186        struct audio_port_config newConfig;
2187        audioPortConfig->toAudioPortConfig(&newConfig, config);
2188        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2189    }
2190    if (status != NO_ERROR) {
2191        audioPortConfig->applyAudioPortConfig(&backupConfig);
2192    }
2193
2194    return status;
2195}
2196
2197void AudioPolicyManager::clearAudioPatches(uid_t uid)
2198{
2199    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2200        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2201        if (patchDesc->mUid == uid) {
2202            // releaseAudioPatch() removes the patch from mAudioPatches
2203            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2204                i--;
2205            }
2206        }
2207    }
2208}
2209
2210status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2211                                           const sp<AudioPatch>& patch)
2212{
2213    ssize_t index = mAudioPatches.indexOfKey(handle);
2214
2215    if (index >= 0) {
2216        ALOGW("addAudioPatch() patch %d already in", handle);
2217        return ALREADY_EXISTS;
2218    }
2219    mAudioPatches.add(handle, patch);
2220    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2221            "sink handle %d",
2222          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2223          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2224    return NO_ERROR;
2225}
2226
2227status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2228{
2229    ssize_t index = mAudioPatches.indexOfKey(handle);
2230
2231    if (index < 0) {
2232        ALOGW("removeAudioPatch() patch %d not in", handle);
2233        return ALREADY_EXISTS;
2234    }
2235    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2236                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2237    mAudioPatches.removeItemsAt(index);
2238    return NO_ERROR;
2239}
2240
2241// ----------------------------------------------------------------------------
2242// AudioPolicyManager
2243// ----------------------------------------------------------------------------
2244
2245uint32_t AudioPolicyManager::nextUniqueId()
2246{
2247    return android_atomic_inc(&mNextUniqueId);
2248}
2249
2250uint32_t AudioPolicyManager::nextAudioPortGeneration()
2251{
2252    return android_atomic_inc(&mAudioPortGeneration);
2253}
2254
2255AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2256    :
2257#ifdef AUDIO_POLICY_TEST
2258    Thread(false),
2259#endif //AUDIO_POLICY_TEST
2260    mPrimaryOutput((audio_io_handle_t)0),
2261    mPhoneState(AUDIO_MODE_NORMAL),
2262    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2263    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2264    mA2dpSuspended(false),
2265    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2266    mAudioPortGeneration(1)
2267{
2268    mUidCached = getuid();
2269    mpClientInterface = clientInterface;
2270
2271    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2272        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2273    }
2274
2275    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2276    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2277        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2278            ALOGE("could not load audio policy configuration file, setting defaults");
2279            defaultAudioPolicyConfig();
2280        }
2281    }
2282    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2283
2284    // must be done after reading the policy
2285    initializeVolumeCurves();
2286
2287    // open all output streams needed to access attached devices
2288    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2289    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2290    for (size_t i = 0; i < mHwModules.size(); i++) {
2291        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2292        if (mHwModules[i]->mHandle == 0) {
2293            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2294            continue;
2295        }
2296        // open all output streams needed to access attached devices
2297        // except for direct output streams that are only opened when they are actually
2298        // required by an app.
2299        // This also validates mAvailableOutputDevices list
2300        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2301        {
2302            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2303
2304            if (outProfile->mSupportedDevices.isEmpty()) {
2305                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2306                continue;
2307            }
2308
2309            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2310            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2311                profileType = mDefaultOutputDevice->mDeviceType;
2312            } else {
2313                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2314            }
2315            if ((profileType & outputDeviceTypes) &&
2316                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2317                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2318
2319                outputDesc->mDevice = profileType;
2320                audio_io_handle_t output = mpClientInterface->openOutput(
2321                                                outProfile->mModule->mHandle,
2322                                                &outputDesc->mDevice,
2323                                                &outputDesc->mSamplingRate,
2324                                                &outputDesc->mFormat,
2325                                                &outputDesc->mChannelMask,
2326                                                &outputDesc->mLatency,
2327                                                outputDesc->mFlags);
2328                if (output == 0) {
2329                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2330                          outputDesc->mDevice,
2331                          mHwModules[i]->mName);
2332                } else {
2333                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2334                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2335                        ssize_t index =
2336                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2337                        // give a valid ID to an attached device once confirmed it is reachable
2338                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2339                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2340                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2341                        }
2342                    }
2343                    if (mPrimaryOutput == 0 &&
2344                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2345                        mPrimaryOutput = output;
2346                    }
2347                    addOutput(output, outputDesc);
2348                    setOutputDevice(output,
2349                                    outputDesc->mDevice,
2350                                    true);
2351                }
2352            }
2353        }
2354        // open input streams needed to access attached devices to validate
2355        // mAvailableInputDevices list
2356        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2357        {
2358            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2359
2360            if (inProfile->mSupportedDevices.isEmpty()) {
2361                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2362                continue;
2363            }
2364
2365            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2366            if (profileType & inputDeviceTypes) {
2367                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2368
2369                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2370                inputDesc->mDevice = profileType;
2371                audio_io_handle_t input = mpClientInterface->openInput(
2372                                                    inProfile->mModule->mHandle,
2373                                                    &inputDesc->mDevice,
2374                                                    &inputDesc->mSamplingRate,
2375                                                    &inputDesc->mFormat,
2376                                                    &inputDesc->mChannelMask,
2377                                                    AUDIO_INPUT_FLAG_NONE /*FIXME*/);
2378
2379                if (input != 0) {
2380                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2381                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2382                        ssize_t index =
2383                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2384                        // give a valid ID to an attached device once confirmed it is reachable
2385                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2386                            mAvailableInputDevices[index]->mId = nextUniqueId();
2387                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2388                        }
2389                    }
2390                    mpClientInterface->closeInput(input);
2391                } else {
2392                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2393                          inputDesc->mDevice,
2394                          mHwModules[i]->mName);
2395                }
2396            }
2397        }
2398    }
2399    // make sure all attached devices have been allocated a unique ID
2400    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2401        if (mAvailableOutputDevices[i]->mId == 0) {
2402            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2403            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2404            continue;
2405        }
2406        i++;
2407    }
2408    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2409        if (mAvailableInputDevices[i]->mId == 0) {
2410            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2411            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2412            continue;
2413        }
2414        i++;
2415    }
2416    // make sure default device is reachable
2417    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2418        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2419    }
2420
2421    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2422
2423    updateDevicesAndOutputs();
2424
2425#ifdef AUDIO_POLICY_TEST
2426    if (mPrimaryOutput != 0) {
2427        AudioParameter outputCmd = AudioParameter();
2428        outputCmd.addInt(String8("set_id"), 0);
2429        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2430
2431        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2432        mTestSamplingRate = 44100;
2433        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2434        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2435        mTestLatencyMs = 0;
2436        mCurOutput = 0;
2437        mDirectOutput = false;
2438        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2439            mTestOutputs[i] = 0;
2440        }
2441
2442        const size_t SIZE = 256;
2443        char buffer[SIZE];
2444        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2445        run(buffer, ANDROID_PRIORITY_AUDIO);
2446    }
2447#endif //AUDIO_POLICY_TEST
2448}
2449
2450AudioPolicyManager::~AudioPolicyManager()
2451{
2452#ifdef AUDIO_POLICY_TEST
2453    exit();
2454#endif //AUDIO_POLICY_TEST
2455   for (size_t i = 0; i < mOutputs.size(); i++) {
2456        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2457   }
2458   for (size_t i = 0; i < mInputs.size(); i++) {
2459        mpClientInterface->closeInput(mInputs.keyAt(i));
2460   }
2461   mAvailableOutputDevices.clear();
2462   mAvailableInputDevices.clear();
2463   mOutputs.clear();
2464   mInputs.clear();
2465   mHwModules.clear();
2466}
2467
2468status_t AudioPolicyManager::initCheck()
2469{
2470    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2471}
2472
2473#ifdef AUDIO_POLICY_TEST
2474bool AudioPolicyManager::threadLoop()
2475{
2476    ALOGV("entering threadLoop()");
2477    while (!exitPending())
2478    {
2479        String8 command;
2480        int valueInt;
2481        String8 value;
2482
2483        Mutex::Autolock _l(mLock);
2484        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2485
2486        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2487        AudioParameter param = AudioParameter(command);
2488
2489        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2490            valueInt != 0) {
2491            ALOGV("Test command %s received", command.string());
2492            String8 target;
2493            if (param.get(String8("target"), target) != NO_ERROR) {
2494                target = "Manager";
2495            }
2496            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2497                param.remove(String8("test_cmd_policy_output"));
2498                mCurOutput = valueInt;
2499            }
2500            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2501                param.remove(String8("test_cmd_policy_direct"));
2502                if (value == "false") {
2503                    mDirectOutput = false;
2504                } else if (value == "true") {
2505                    mDirectOutput = true;
2506                }
2507            }
2508            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2509                param.remove(String8("test_cmd_policy_input"));
2510                mTestInput = valueInt;
2511            }
2512
2513            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2514                param.remove(String8("test_cmd_policy_format"));
2515                int format = AUDIO_FORMAT_INVALID;
2516                if (value == "PCM 16 bits") {
2517                    format = AUDIO_FORMAT_PCM_16_BIT;
2518                } else if (value == "PCM 8 bits") {
2519                    format = AUDIO_FORMAT_PCM_8_BIT;
2520                } else if (value == "Compressed MP3") {
2521                    format = AUDIO_FORMAT_MP3;
2522                }
2523                if (format != AUDIO_FORMAT_INVALID) {
2524                    if (target == "Manager") {
2525                        mTestFormat = format;
2526                    } else if (mTestOutputs[mCurOutput] != 0) {
2527                        AudioParameter outputParam = AudioParameter();
2528                        outputParam.addInt(String8("format"), format);
2529                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2530                    }
2531                }
2532            }
2533            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2534                param.remove(String8("test_cmd_policy_channels"));
2535                int channels = 0;
2536
2537                if (value == "Channels Stereo") {
2538                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2539                } else if (value == "Channels Mono") {
2540                    channels =  AUDIO_CHANNEL_OUT_MONO;
2541                }
2542                if (channels != 0) {
2543                    if (target == "Manager") {
2544                        mTestChannels = channels;
2545                    } else if (mTestOutputs[mCurOutput] != 0) {
2546                        AudioParameter outputParam = AudioParameter();
2547                        outputParam.addInt(String8("channels"), channels);
2548                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2549                    }
2550                }
2551            }
2552            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2553                param.remove(String8("test_cmd_policy_sampleRate"));
2554                if (valueInt >= 0 && valueInt <= 96000) {
2555                    int samplingRate = valueInt;
2556                    if (target == "Manager") {
2557                        mTestSamplingRate = samplingRate;
2558                    } else if (mTestOutputs[mCurOutput] != 0) {
2559                        AudioParameter outputParam = AudioParameter();
2560                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2561                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2562                    }
2563                }
2564            }
2565
2566            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2567                param.remove(String8("test_cmd_policy_reopen"));
2568
2569                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2570                mpClientInterface->closeOutput(mPrimaryOutput);
2571
2572                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2573
2574                mOutputs.removeItem(mPrimaryOutput);
2575
2576                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2577                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2578                mPrimaryOutput = mpClientInterface->openOutput(moduleHandle,
2579                                                &outputDesc->mDevice,
2580                                                &outputDesc->mSamplingRate,
2581                                                &outputDesc->mFormat,
2582                                                &outputDesc->mChannelMask,
2583                                                &outputDesc->mLatency,
2584                                                outputDesc->mFlags);
2585                if (mPrimaryOutput == 0) {
2586                    ALOGE("Failed to reopen hardware output stream, samplingRate: %d, format %d, channels %d",
2587                            outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2588                } else {
2589                    AudioParameter outputCmd = AudioParameter();
2590                    outputCmd.addInt(String8("set_id"), 0);
2591                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2592                    addOutput(mPrimaryOutput, outputDesc);
2593                }
2594            }
2595
2596
2597            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2598        }
2599    }
2600    return false;
2601}
2602
2603void AudioPolicyManager::exit()
2604{
2605    {
2606        AutoMutex _l(mLock);
2607        requestExit();
2608        mWaitWorkCV.signal();
2609    }
2610    requestExitAndWait();
2611}
2612
2613int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2614{
2615    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2616        if (output == mTestOutputs[i]) return i;
2617    }
2618    return 0;
2619}
2620#endif //AUDIO_POLICY_TEST
2621
2622// ---
2623
2624void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2625{
2626    outputDesc->mIoHandle = output;
2627    outputDesc->mId = nextUniqueId();
2628    mOutputs.add(output, outputDesc);
2629    nextAudioPortGeneration();
2630}
2631
2632void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2633{
2634    inputDesc->mIoHandle = input;
2635    inputDesc->mId = nextUniqueId();
2636    mInputs.add(input, inputDesc);
2637    nextAudioPortGeneration();
2638}
2639
2640String8 AudioPolicyManager::addressToParameter(audio_devices_t device, const String8 address)
2641{
2642    if (device & AUDIO_DEVICE_OUT_ALL_A2DP) {
2643        return String8("a2dp_sink_address=")+address;
2644    } else if (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX) {
2645        return String8("mix=")+address;
2646    }
2647    return address;
2648}
2649
2650void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
2651        const String8 address /*in*/,
2652        SortedVector<audio_io_handle_t>& outputs /*out*/) {
2653    // look for a match on the given address on the addresses of the outputs:
2654    // find the address by finding the patch that maps to this output
2655    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
2656    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
2657    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
2658    if (patchIdx >= 0) {
2659        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
2660        const int numSinks = patchDesc->mPatch.num_sinks;
2661        for (ssize_t j=0; j < numSinks; j++) {
2662            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
2663                const char* patchAddr =
2664                        patchDesc->mPatch.sinks[j].ext.device.address;
2665                if (strncmp(patchAddr,
2666                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
2667                    ALOGV("checkOutputsForDevice(): adding opened output %d on same address %s",
2668                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
2669                    outputs.add(desc->mIoHandle);
2670                    break;
2671                }
2672            }
2673        }
2674    }
2675}
2676
2677status_t AudioPolicyManager::checkOutputsForDevice(audio_devices_t device,
2678                                                       audio_policy_dev_state_t state,
2679                                                       SortedVector<audio_io_handle_t>& outputs,
2680                                                       const String8 address)
2681{
2682    sp<AudioOutputDescriptor> desc;
2683
2684    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
2685        // first list already open outputs that can be routed to this device
2686        for (size_t i = 0; i < mOutputs.size(); i++) {
2687            desc = mOutputs.valueAt(i);
2688            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
2689                if (!deviceDistinguishesOnAddress(device)) {
2690                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
2691                    outputs.add(mOutputs.keyAt(i));
2692                } else {
2693                    ALOGV("  checking address match due to device 0x%x", device);
2694                    findIoHandlesByAddress(desc, address, outputs);
2695                }
2696            }
2697        }
2698        // then look for output profiles that can be routed to this device
2699        SortedVector< sp<IOProfile> > profiles;
2700        for (size_t i = 0; i < mHwModules.size(); i++)
2701        {
2702            if (mHwModules[i]->mHandle == 0) {
2703                continue;
2704            }
2705            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2706            {
2707                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2708                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
2709                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
2710                }
2711            }
2712        }
2713
2714        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
2715
2716        if (profiles.isEmpty() && outputs.isEmpty()) {
2717            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
2718            return BAD_VALUE;
2719        }
2720
2721        // open outputs for matching profiles if needed. Direct outputs are also opened to
2722        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
2723        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
2724            sp<IOProfile> profile = profiles[profile_index];
2725
2726            // nothing to do if one output is already opened for this profile
2727            size_t j;
2728            for (j = 0; j < outputs.size(); j++) {
2729                desc = mOutputs.valueFor(outputs.itemAt(j));
2730                if (!desc->isDuplicated() && desc->mProfile == profile) {
2731                    break;
2732                }
2733            }
2734            if (j != outputs.size()) {
2735                continue;
2736            }
2737
2738            ALOGV("opening output for device %08x with params %s profile %p",
2739                                                      device, address.string(), profile.get());
2740            desc = new AudioOutputDescriptor(profile);
2741            desc->mDevice = device;
2742            audio_offload_info_t offloadInfo = AUDIO_INFO_INITIALIZER;
2743            offloadInfo.sample_rate = desc->mSamplingRate;
2744            offloadInfo.format = desc->mFormat;
2745            offloadInfo.channel_mask = desc->mChannelMask;
2746
2747            audio_io_handle_t output = mpClientInterface->openOutput(profile->mModule->mHandle,
2748                                                                       &desc->mDevice,
2749                                                                       &desc->mSamplingRate,
2750                                                                       &desc->mFormat,
2751                                                                       &desc->mChannelMask,
2752                                                                       &desc->mLatency,
2753                                                                       desc->mFlags,
2754                                                                       &offloadInfo);
2755            if (output != 0) {
2756                // Here is where the out_set_parameters() for card & device gets called
2757                if (!address.isEmpty()) {
2758                    mpClientInterface->setParameters(output, addressToParameter(device, address));
2759                }
2760
2761                // Here is where we step through and resolve any "dynamic" fields
2762                String8 reply;
2763                char *value;
2764                if (profile->mSamplingRates[0] == 0) {
2765                    reply = mpClientInterface->getParameters(output,
2766                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
2767                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
2768                              reply.string());
2769                    value = strpbrk((char *)reply.string(), "=");
2770                    if (value != NULL) {
2771                        profile->loadSamplingRates(value + 1);
2772                    }
2773                }
2774                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
2775                    reply = mpClientInterface->getParameters(output,
2776                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
2777                    ALOGV("checkOutputsForDevice() supported formats %s",
2778                              reply.string());
2779                    value = strpbrk((char *)reply.string(), "=");
2780                    if (value != NULL) {
2781                        profile->loadFormats(value + 1);
2782                    }
2783                }
2784                if (profile->mChannelMasks[0] == 0) {
2785                    reply = mpClientInterface->getParameters(output,
2786                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
2787                    ALOGV("checkOutputsForDevice() supported channel masks %s",
2788                              reply.string());
2789                    value = strpbrk((char *)reply.string(), "=");
2790                    if (value != NULL) {
2791                        profile->loadOutChannels(value + 1);
2792                    }
2793                }
2794                if (((profile->mSamplingRates[0] == 0) &&
2795                         (profile->mSamplingRates.size() < 2)) ||
2796                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
2797                         (profile->mFormats.size() < 2)) ||
2798                     ((profile->mChannelMasks[0] == 0) &&
2799                         (profile->mChannelMasks.size() < 2))) {
2800                    ALOGW("checkOutputsForDevice() missing param");
2801                    mpClientInterface->closeOutput(output);
2802                    output = 0;
2803                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
2804                            profile->mChannelMasks[0] == 0) {
2805                    mpClientInterface->closeOutput(output);
2806                    desc->mSamplingRate = profile->pickSamplingRate();
2807                    desc->mFormat = profile->pickFormat();
2808                    desc->mChannelMask = profile->pickChannelMask();
2809                    offloadInfo.sample_rate = desc->mSamplingRate;
2810                    offloadInfo.format = desc->mFormat;
2811                    offloadInfo.channel_mask = desc->mChannelMask;
2812                    output = mpClientInterface->openOutput(
2813                                                    profile->mModule->mHandle,
2814                                                    &desc->mDevice,
2815                                                    &desc->mSamplingRate,
2816                                                    &desc->mFormat,
2817                                                    &desc->mChannelMask,
2818                                                    &desc->mLatency,
2819                                                    desc->mFlags,
2820                                                    &offloadInfo);
2821                }
2822
2823                if (output != 0) {
2824                    addOutput(output, desc);
2825                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
2826                        audio_io_handle_t duplicatedOutput = 0;
2827
2828                        // set initial stream volume for device
2829                        applyStreamVolumes(output, device, 0, true);
2830
2831                        //TODO: configure audio effect output stage here
2832
2833                        // open a duplicating output thread for the new output and the primary output
2834                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
2835                                                                                  mPrimaryOutput);
2836                        if (duplicatedOutput != 0) {
2837                            // add duplicated output descriptor
2838                            sp<AudioOutputDescriptor> dupOutputDesc = new AudioOutputDescriptor(NULL);
2839                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
2840                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
2841                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
2842                            dupOutputDesc->mFormat = desc->mFormat;
2843                            dupOutputDesc->mChannelMask = desc->mChannelMask;
2844                            dupOutputDesc->mLatency = desc->mLatency;
2845                            addOutput(duplicatedOutput, dupOutputDesc);
2846                            applyStreamVolumes(duplicatedOutput, device, 0, true);
2847                        } else {
2848                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
2849                                    mPrimaryOutput, output);
2850                            mpClientInterface->closeOutput(output);
2851                            mOutputs.removeItem(output);
2852                            nextAudioPortGeneration();
2853                            output = 0;
2854                        }
2855                    }
2856                }
2857            }
2858            if (output == 0) {
2859                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
2860                profiles.removeAt(profile_index);
2861                profile_index--;
2862            } else {
2863                outputs.add(output);
2864                if (deviceDistinguishesOnAddress(device)) {
2865                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
2866                            device, address.string());
2867                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
2868                            NULL/*patch handle*/, address.string());
2869                }
2870                ALOGV("checkOutputsForDevice(): adding output %d", output);
2871            }
2872        }
2873
2874        if (profiles.isEmpty()) {
2875            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
2876            return BAD_VALUE;
2877        }
2878    } else { // Disconnect
2879        // check if one opened output is not needed any more after disconnecting one device
2880        for (size_t i = 0; i < mOutputs.size(); i++) {
2881            desc = mOutputs.valueAt(i);
2882            if (!desc->isDuplicated()) {
2883                if  (!(desc->mProfile->mSupportedDevices.types()
2884                        & mAvailableOutputDevices.types())) {
2885                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
2886                            mOutputs.keyAt(i));
2887                    outputs.add(mOutputs.keyAt(i));
2888                } else if (deviceDistinguishesOnAddress(device) &&
2889                        // exact match on device
2890                        (desc->mProfile->mSupportedDevices.types() == device)) {
2891                    findIoHandlesByAddress(desc, address, outputs);
2892                }
2893            }
2894        }
2895        // Clear any profiles associated with the disconnected device.
2896        for (size_t i = 0; i < mHwModules.size(); i++)
2897        {
2898            if (mHwModules[i]->mHandle == 0) {
2899                continue;
2900            }
2901            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2902            {
2903                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
2904                if (profile->mSupportedDevices.types() & device) {
2905                    ALOGV("checkOutputsForDevice(): "
2906                            "clearing direct output profile %zu on module %zu", j, i);
2907                    if (profile->mSamplingRates[0] == 0) {
2908                        profile->mSamplingRates.clear();
2909                        profile->mSamplingRates.add(0);
2910                    }
2911                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
2912                        profile->mFormats.clear();
2913                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
2914                    }
2915                    if (profile->mChannelMasks[0] == 0) {
2916                        profile->mChannelMasks.clear();
2917                        profile->mChannelMasks.add(0);
2918                    }
2919                }
2920            }
2921        }
2922    }
2923    return NO_ERROR;
2924}
2925
2926status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
2927                                                      audio_policy_dev_state_t state,
2928                                                      SortedVector<audio_io_handle_t>& inputs,
2929                                                      const String8 address)
2930{
2931    sp<AudioInputDescriptor> desc;
2932    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
2933        // first list already open inputs that can be routed to this device
2934        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
2935            desc = mInputs.valueAt(input_index);
2936            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
2937                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
2938               inputs.add(mInputs.keyAt(input_index));
2939            }
2940        }
2941
2942        // then look for input profiles that can be routed to this device
2943        SortedVector< sp<IOProfile> > profiles;
2944        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
2945        {
2946            if (mHwModules[module_idx]->mHandle == 0) {
2947                continue;
2948            }
2949            for (size_t profile_index = 0;
2950                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
2951                 profile_index++)
2952            {
2953                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
2954                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
2955                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
2956                          profile_index, module_idx);
2957                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
2958                }
2959            }
2960        }
2961
2962        if (profiles.isEmpty() && inputs.isEmpty()) {
2963            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
2964            return BAD_VALUE;
2965        }
2966
2967        // open inputs for matching profiles if needed. Direct inputs are also opened to
2968        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
2969        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
2970
2971            sp<IOProfile> profile = profiles[profile_index];
2972            // nothing to do if one input is already opened for this profile
2973            size_t input_index;
2974            for (input_index = 0; input_index < mInputs.size(); input_index++) {
2975                desc = mInputs.valueAt(input_index);
2976                if (desc->mProfile == profile) {
2977                    break;
2978                }
2979            }
2980            if (input_index != mInputs.size()) {
2981                continue;
2982            }
2983
2984            ALOGV("opening input for device 0x%X with params %s", device, address.string());
2985            desc = new AudioInputDescriptor(profile);
2986            desc->mDevice = device;
2987
2988            audio_io_handle_t input = mpClientInterface->openInput(profile->mModule->mHandle,
2989                                            &desc->mDevice,
2990                                            &desc->mSamplingRate,
2991                                            &desc->mFormat,
2992                                            &desc->mChannelMask,
2993                                            AUDIO_INPUT_FLAG_NONE /*FIXME*/);
2994
2995            if (input != 0) {
2996                if (!address.isEmpty()) {
2997                    mpClientInterface->setParameters(input, addressToParameter(device, address));
2998                }
2999
3000                // Here is where we step through and resolve any "dynamic" fields
3001                String8 reply;
3002                char *value;
3003                if (profile->mSamplingRates[0] == 0) {
3004                    reply = mpClientInterface->getParameters(input,
3005                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3006                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3007                              reply.string());
3008                    value = strpbrk((char *)reply.string(), "=");
3009                    if (value != NULL) {
3010                        profile->loadSamplingRates(value + 1);
3011                    }
3012                }
3013                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3014                    reply = mpClientInterface->getParameters(input,
3015                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3016                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3017                    value = strpbrk((char *)reply.string(), "=");
3018                    if (value != NULL) {
3019                        profile->loadFormats(value + 1);
3020                    }
3021                }
3022                if (profile->mChannelMasks[0] == 0) {
3023                    reply = mpClientInterface->getParameters(input,
3024                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3025                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3026                              reply.string());
3027                    value = strpbrk((char *)reply.string(), "=");
3028                    if (value != NULL) {
3029                        profile->loadInChannels(value + 1);
3030                    }
3031                }
3032                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3033                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3034                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3035                    ALOGW("checkInputsForDevice() direct input missing param");
3036                    mpClientInterface->closeInput(input);
3037                    input = 0;
3038                }
3039
3040                if (input != 0) {
3041                    addInput(input, desc);
3042                }
3043            } // endif input != 0
3044
3045            if (input == 0) {
3046                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3047                profiles.removeAt(profile_index);
3048                profile_index--;
3049            } else {
3050                inputs.add(input);
3051                ALOGV("checkInputsForDevice(): adding input %d", input);
3052            }
3053        } // end scan profiles
3054
3055        if (profiles.isEmpty()) {
3056            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3057            return BAD_VALUE;
3058        }
3059    } else {
3060        // Disconnect
3061        // check if one opened input is not needed any more after disconnecting one device
3062        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3063            desc = mInputs.valueAt(input_index);
3064            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3065                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3066                      mInputs.keyAt(input_index));
3067                inputs.add(mInputs.keyAt(input_index));
3068            }
3069        }
3070        // Clear any profiles associated with the disconnected device.
3071        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3072            if (mHwModules[module_index]->mHandle == 0) {
3073                continue;
3074            }
3075            for (size_t profile_index = 0;
3076                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3077                 profile_index++) {
3078                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3079                if (profile->mSupportedDevices.types() & device) {
3080                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3081                          profile_index, module_index);
3082                    if (profile->mSamplingRates[0] == 0) {
3083                        profile->mSamplingRates.clear();
3084                        profile->mSamplingRates.add(0);
3085                    }
3086                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3087                        profile->mFormats.clear();
3088                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3089                    }
3090                    if (profile->mChannelMasks[0] == 0) {
3091                        profile->mChannelMasks.clear();
3092                        profile->mChannelMasks.add(0);
3093                    }
3094                }
3095            }
3096        }
3097    } // end disconnect
3098
3099    return NO_ERROR;
3100}
3101
3102
3103void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3104{
3105    ALOGV("closeOutput(%d)", output);
3106
3107    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3108    if (outputDesc == NULL) {
3109        ALOGW("closeOutput() unknown output %d", output);
3110        return;
3111    }
3112
3113    // look for duplicated outputs connected to the output being removed.
3114    for (size_t i = 0; i < mOutputs.size(); i++) {
3115        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3116        if (dupOutputDesc->isDuplicated() &&
3117                (dupOutputDesc->mOutput1 == outputDesc ||
3118                dupOutputDesc->mOutput2 == outputDesc)) {
3119            sp<AudioOutputDescriptor> outputDesc2;
3120            if (dupOutputDesc->mOutput1 == outputDesc) {
3121                outputDesc2 = dupOutputDesc->mOutput2;
3122            } else {
3123                outputDesc2 = dupOutputDesc->mOutput1;
3124            }
3125            // As all active tracks on duplicated output will be deleted,
3126            // and as they were also referenced on the other output, the reference
3127            // count for their stream type must be adjusted accordingly on
3128            // the other output.
3129            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3130                int refCount = dupOutputDesc->mRefCount[j];
3131                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3132            }
3133            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3134            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3135
3136            mpClientInterface->closeOutput(duplicatedOutput);
3137            mOutputs.removeItem(duplicatedOutput);
3138        }
3139    }
3140
3141    AudioParameter param;
3142    param.add(String8("closing"), String8("true"));
3143    mpClientInterface->setParameters(output, param.toString());
3144
3145    mpClientInterface->closeOutput(output);
3146    mOutputs.removeItem(output);
3147    mPreviousOutputs = mOutputs;
3148    nextAudioPortGeneration();
3149}
3150
3151SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3152                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3153{
3154    SortedVector<audio_io_handle_t> outputs;
3155
3156    ALOGVV("getOutputsForDevice() device %04x", device);
3157    for (size_t i = 0; i < openOutputs.size(); i++) {
3158        ALOGVV("output %d isDuplicated=%d device=%04x",
3159                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3160        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3161            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3162            outputs.add(openOutputs.keyAt(i));
3163        }
3164    }
3165    return outputs;
3166}
3167
3168bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3169                                   SortedVector<audio_io_handle_t>& outputs2)
3170{
3171    if (outputs1.size() != outputs2.size()) {
3172        return false;
3173    }
3174    for (size_t i = 0; i < outputs1.size(); i++) {
3175        if (outputs1[i] != outputs2[i]) {
3176            return false;
3177        }
3178    }
3179    return true;
3180}
3181
3182void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3183{
3184    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3185    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3186    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3187    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3188
3189    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3190        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3191              strategy, srcOutputs[0], dstOutputs[0]);
3192        // mute strategy while moving tracks from one output to another
3193        for (size_t i = 0; i < srcOutputs.size(); i++) {
3194            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3195            if (desc->isStrategyActive(strategy)) {
3196                setStrategyMute(strategy, true, srcOutputs[i]);
3197                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3198            }
3199        }
3200
3201        // Move effects associated to this strategy from previous output to new output
3202        if (strategy == STRATEGY_MEDIA) {
3203            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3204            SortedVector<audio_io_handle_t> moved;
3205            for (size_t i = 0; i < mEffects.size(); i++) {
3206                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3207                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3208                        effectDesc->mIo != fxOutput) {
3209                    if (moved.indexOf(effectDesc->mIo) < 0) {
3210                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3211                              mEffects.keyAt(i), fxOutput);
3212                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3213                                                       fxOutput);
3214                        moved.add(effectDesc->mIo);
3215                    }
3216                    effectDesc->mIo = fxOutput;
3217                }
3218            }
3219        }
3220        // Move tracks associated to this strategy from previous output to new output
3221        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3222            if (getStrategy((audio_stream_type_t)i) == strategy) {
3223                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3224            }
3225        }
3226    }
3227}
3228
3229void AudioPolicyManager::checkOutputForAllStrategies()
3230{
3231    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3232    checkOutputForStrategy(STRATEGY_PHONE);
3233    checkOutputForStrategy(STRATEGY_SONIFICATION);
3234    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3235    checkOutputForStrategy(STRATEGY_MEDIA);
3236    checkOutputForStrategy(STRATEGY_DTMF);
3237}
3238
3239audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3240{
3241    for (size_t i = 0; i < mOutputs.size(); i++) {
3242        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3243        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3244            return mOutputs.keyAt(i);
3245        }
3246    }
3247
3248    return 0;
3249}
3250
3251void AudioPolicyManager::checkA2dpSuspend()
3252{
3253    audio_io_handle_t a2dpOutput = getA2dpOutput();
3254    if (a2dpOutput == 0) {
3255        mA2dpSuspended = false;
3256        return;
3257    }
3258
3259    bool isScoConnected =
3260            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3261    // suspend A2DP output if:
3262    //      (NOT already suspended) &&
3263    //      ((SCO device is connected &&
3264    //       (forced usage for communication || for record is SCO))) ||
3265    //      (phone state is ringing || in call)
3266    //
3267    // restore A2DP output if:
3268    //      (Already suspended) &&
3269    //      ((SCO device is NOT connected ||
3270    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3271    //      (phone state is NOT ringing && NOT in call)
3272    //
3273    if (mA2dpSuspended) {
3274        if ((!isScoConnected ||
3275             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3276              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3277             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3278              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3279
3280            mpClientInterface->restoreOutput(a2dpOutput);
3281            mA2dpSuspended = false;
3282        }
3283    } else {
3284        if ((isScoConnected &&
3285             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3286              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3287             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3288              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3289
3290            mpClientInterface->suspendOutput(a2dpOutput);
3291            mA2dpSuspended = true;
3292        }
3293    }
3294}
3295
3296audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3297{
3298    audio_devices_t device = AUDIO_DEVICE_NONE;
3299
3300    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3301
3302    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3303    if (index >= 0) {
3304        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3305        if (patchDesc->mUid != mUidCached) {
3306            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3307                  outputDesc->device(), outputDesc->mPatchHandle);
3308            return outputDesc->device();
3309        }
3310    }
3311
3312    // check the following by order of priority to request a routing change if necessary:
3313    // 1: the strategy enforced audible is active on the output:
3314    //      use device for strategy enforced audible
3315    // 2: we are in call or the strategy phone is active on the output:
3316    //      use device for strategy phone
3317    // 3: the strategy sonification is active on the output:
3318    //      use device for strategy sonification
3319    // 4: the strategy "respectful" sonification is active on the output:
3320    //      use device for strategy "respectful" sonification
3321    // 5: the strategy media is active on the output:
3322    //      use device for strategy media
3323    // 6: the strategy DTMF is active on the output:
3324    //      use device for strategy DTMF
3325    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3326        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3327    } else if (isInCall() ||
3328                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3329        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3330    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3331        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3332    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3333        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3334    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3335        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3336    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3337        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3338    }
3339
3340    ALOGV("getNewOutputDevice() selected device %x", device);
3341    return device;
3342}
3343
3344audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3345{
3346    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3347
3348    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3349    if (index >= 0) {
3350        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3351        if (patchDesc->mUid != mUidCached) {
3352            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3353                  inputDesc->mDevice, inputDesc->mPatchHandle);
3354            return inputDesc->mDevice;
3355        }
3356    }
3357
3358    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3359
3360    ALOGV("getNewInputDevice() selected device %x", device);
3361    return device;
3362}
3363
3364uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3365    return (uint32_t)getStrategy(stream);
3366}
3367
3368audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3369    // By checking the range of stream before calling getStrategy, we avoid
3370    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3371    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3372    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3373        return AUDIO_DEVICE_NONE;
3374    }
3375    audio_devices_t devices;
3376    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3377    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3378    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3379    for (size_t i = 0; i < outputs.size(); i++) {
3380        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3381        if (outputDesc->isStrategyActive(strategy)) {
3382            devices = outputDesc->device();
3383            break;
3384        }
3385    }
3386    return devices;
3387}
3388
3389AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3390        audio_stream_type_t stream) {
3391    // stream to strategy mapping
3392    switch (stream) {
3393    case AUDIO_STREAM_VOICE_CALL:
3394    case AUDIO_STREAM_BLUETOOTH_SCO:
3395        return STRATEGY_PHONE;
3396    case AUDIO_STREAM_RING:
3397    case AUDIO_STREAM_ALARM:
3398        return STRATEGY_SONIFICATION;
3399    case AUDIO_STREAM_NOTIFICATION:
3400        return STRATEGY_SONIFICATION_RESPECTFUL;
3401    case AUDIO_STREAM_DTMF:
3402        return STRATEGY_DTMF;
3403    default:
3404        ALOGE("unknown stream type");
3405    case AUDIO_STREAM_SYSTEM:
3406        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3407        // while key clicks are played produces a poor result
3408    case AUDIO_STREAM_TTS:
3409    case AUDIO_STREAM_MUSIC:
3410        return STRATEGY_MEDIA;
3411    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3412        return STRATEGY_ENFORCED_AUDIBLE;
3413    }
3414}
3415
3416uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3417    // flags to strategy mapping
3418    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3419        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3420    }
3421
3422    // usage to strategy mapping
3423    switch (attr->usage) {
3424    case AUDIO_USAGE_MEDIA:
3425    case AUDIO_USAGE_GAME:
3426    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3427    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3428    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3429        return (uint32_t) STRATEGY_MEDIA;
3430
3431    case AUDIO_USAGE_VOICE_COMMUNICATION:
3432        return (uint32_t) STRATEGY_PHONE;
3433
3434    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3435        return (uint32_t) STRATEGY_DTMF;
3436
3437    case AUDIO_USAGE_ALARM:
3438    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3439        return (uint32_t) STRATEGY_SONIFICATION;
3440
3441    case AUDIO_USAGE_NOTIFICATION:
3442    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3443    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3444    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3445    case AUDIO_USAGE_NOTIFICATION_EVENT:
3446        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3447
3448    case AUDIO_USAGE_UNKNOWN:
3449    default:
3450        return (uint32_t) STRATEGY_MEDIA;
3451    }
3452}
3453
3454void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3455    switch(stream) {
3456    case AUDIO_STREAM_MUSIC:
3457        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3458        updateDevicesAndOutputs();
3459        break;
3460    default:
3461        break;
3462    }
3463}
3464
3465audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3466                                                             bool fromCache)
3467{
3468    uint32_t device = AUDIO_DEVICE_NONE;
3469
3470    if (fromCache) {
3471        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3472              strategy, mDeviceForStrategy[strategy]);
3473        return mDeviceForStrategy[strategy];
3474    }
3475    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3476    switch (strategy) {
3477
3478    case STRATEGY_SONIFICATION_RESPECTFUL:
3479        if (isInCall()) {
3480            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3481        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3482                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3483            // while media is playing on a remote device, use the the sonification behavior.
3484            // Note that we test this usecase before testing if media is playing because
3485            //   the isStreamActive() method only informs about the activity of a stream, not
3486            //   if it's for local playback. Note also that we use the same delay between both tests
3487            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3488        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3489            // while media is playing (or has recently played), use the same device
3490            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3491        } else {
3492            // when media is not playing anymore, fall back on the sonification behavior
3493            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3494        }
3495
3496        break;
3497
3498    case STRATEGY_DTMF:
3499        if (!isInCall()) {
3500            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3501            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3502            break;
3503        }
3504        // when in call, DTMF and PHONE strategies follow the same rules
3505        // FALL THROUGH
3506
3507    case STRATEGY_PHONE:
3508        // for phone strategy, we first consider the forced use and then the available devices by order
3509        // of priority
3510        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3511        case AUDIO_POLICY_FORCE_BT_SCO:
3512            if (!isInCall() || strategy != STRATEGY_DTMF) {
3513                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3514                if (device) break;
3515            }
3516            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3517            if (device) break;
3518            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3519            if (device) break;
3520            // if SCO device is requested but no SCO device is available, fall back to default case
3521            // FALL THROUGH
3522
3523        default:    // FORCE_NONE
3524            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3525            if (!isInCall() &&
3526                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3527                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3528                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3529                if (device) break;
3530                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3531                if (device) break;
3532            }
3533            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3534            if (device) break;
3535            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3536            if (device) break;
3537            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3538                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3539                if (device) break;
3540                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3541                if (device) break;
3542                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3543                if (device) break;
3544                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3545                if (device) break;
3546                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3547                if (device) break;
3548            }
3549            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3550            if (device) break;
3551            device = mDefaultOutputDevice->mDeviceType;
3552            if (device == AUDIO_DEVICE_NONE) {
3553                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3554            }
3555            break;
3556
3557        case AUDIO_POLICY_FORCE_SPEAKER:
3558            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3559            // A2DP speaker when forcing to speaker output
3560            if (!isInCall() &&
3561                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3562                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3563                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3564                if (device) break;
3565            }
3566            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3567                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3568                if (device) break;
3569                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3570                if (device) break;
3571                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3572                if (device) break;
3573                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3574                if (device) break;
3575                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3576                if (device) break;
3577            }
3578            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3579            if (device) break;
3580            device = mDefaultOutputDevice->mDeviceType;
3581            if (device == AUDIO_DEVICE_NONE) {
3582                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
3583            }
3584            break;
3585        }
3586    break;
3587
3588    case STRATEGY_SONIFICATION:
3589
3590        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
3591        // handleIncallSonification().
3592        if (isInCall()) {
3593            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
3594            break;
3595        }
3596        // FALL THROUGH
3597
3598    case STRATEGY_ENFORCED_AUDIBLE:
3599        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
3600        // except:
3601        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
3602        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
3603
3604        if ((strategy == STRATEGY_SONIFICATION) ||
3605                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
3606            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3607            if (device == AUDIO_DEVICE_NONE) {
3608                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
3609            }
3610        }
3611        // The second device used for sonification is the same as the device used by media strategy
3612        // FALL THROUGH
3613
3614    case STRATEGY_MEDIA: {
3615        uint32_t device2 = AUDIO_DEVICE_NONE;
3616        if (strategy != STRATEGY_SONIFICATION) {
3617            // no sonification on remote submix (e.g. WFD)
3618            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
3619        }
3620        if ((device2 == AUDIO_DEVICE_NONE) &&
3621                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3622                (getA2dpOutput() != 0) && !mA2dpSuspended) {
3623            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3624            if (device2 == AUDIO_DEVICE_NONE) {
3625                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3626            }
3627            if (device2 == AUDIO_DEVICE_NONE) {
3628                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3629            }
3630        }
3631        if (device2 == AUDIO_DEVICE_NONE) {
3632            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3633        }
3634        if (device2 == AUDIO_DEVICE_NONE) {
3635            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3636        }
3637        if (device2 == AUDIO_DEVICE_NONE) {
3638            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3639        }
3640        if (device2 == AUDIO_DEVICE_NONE) {
3641            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3642        }
3643        if (device2 == AUDIO_DEVICE_NONE) {
3644            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3645        }
3646        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
3647            // no sonification on aux digital (e.g. HDMI)
3648            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3649        }
3650        if ((device2 == AUDIO_DEVICE_NONE) &&
3651                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
3652            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3653        }
3654        if (device2 == AUDIO_DEVICE_NONE) {
3655            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3656        }
3657        int device3 = AUDIO_DEVICE_NONE;
3658        if (strategy == STRATEGY_MEDIA) {
3659            // ARC, SPDIF and AUX_LINE can co-exist with others.
3660            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
3661            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
3662            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
3663        }
3664
3665        device2 |= device3;
3666        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
3667        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
3668        device |= device2;
3669
3670        // If hdmi system audio mode is on, remove speaker out of output list.
3671        if ((strategy == STRATEGY_MEDIA) &&
3672            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
3673                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
3674            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
3675        }
3676
3677        if (device) break;
3678        device = mDefaultOutputDevice->mDeviceType;
3679        if (device == AUDIO_DEVICE_NONE) {
3680            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
3681        }
3682        } break;
3683
3684    default:
3685        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
3686        break;
3687    }
3688
3689    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
3690    return device;
3691}
3692
3693void AudioPolicyManager::updateDevicesAndOutputs()
3694{
3695    for (int i = 0; i < NUM_STRATEGIES; i++) {
3696        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
3697    }
3698    mPreviousOutputs = mOutputs;
3699}
3700
3701uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
3702                                                       audio_devices_t prevDevice,
3703                                                       uint32_t delayMs)
3704{
3705    // mute/unmute strategies using an incompatible device combination
3706    // if muting, wait for the audio in pcm buffer to be drained before proceeding
3707    // if unmuting, unmute only after the specified delay
3708    if (outputDesc->isDuplicated()) {
3709        return 0;
3710    }
3711
3712    uint32_t muteWaitMs = 0;
3713    audio_devices_t device = outputDesc->device();
3714    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
3715
3716    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
3717        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
3718        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
3719        bool doMute = false;
3720
3721        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
3722            doMute = true;
3723            outputDesc->mStrategyMutedByDevice[i] = true;
3724        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
3725            doMute = true;
3726            outputDesc->mStrategyMutedByDevice[i] = false;
3727        }
3728        if (doMute) {
3729            for (size_t j = 0; j < mOutputs.size(); j++) {
3730                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
3731                // skip output if it does not share any device with current output
3732                if ((desc->supportedDevices() & outputDesc->supportedDevices())
3733                        == AUDIO_DEVICE_NONE) {
3734                    continue;
3735                }
3736                audio_io_handle_t curOutput = mOutputs.keyAt(j);
3737                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
3738                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
3739                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
3740                if (desc->isStrategyActive((routing_strategy)i)) {
3741                    if (mute) {
3742                        // FIXME: should not need to double latency if volume could be applied
3743                        // immediately by the audioflinger mixer. We must account for the delay
3744                        // between now and the next time the audioflinger thread for this output
3745                        // will process a buffer (which corresponds to one buffer size,
3746                        // usually 1/2 or 1/4 of the latency).
3747                        if (muteWaitMs < desc->latency() * 2) {
3748                            muteWaitMs = desc->latency() * 2;
3749                        }
3750                    }
3751                }
3752            }
3753        }
3754    }
3755
3756    // temporary mute output if device selection changes to avoid volume bursts due to
3757    // different per device volumes
3758    if (outputDesc->isActive() && (device != prevDevice)) {
3759        if (muteWaitMs < outputDesc->latency() * 2) {
3760            muteWaitMs = outputDesc->latency() * 2;
3761        }
3762        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
3763            if (outputDesc->isStrategyActive((routing_strategy)i)) {
3764                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
3765                // do tempMute unmute after twice the mute wait time
3766                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
3767                                muteWaitMs *2, device);
3768            }
3769        }
3770    }
3771
3772    // wait for the PCM output buffers to empty before proceeding with the rest of the command
3773    if (muteWaitMs > delayMs) {
3774        muteWaitMs -= delayMs;
3775        usleep(muteWaitMs * 1000);
3776        return muteWaitMs;
3777    }
3778    return 0;
3779}
3780
3781uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
3782                                             audio_devices_t device,
3783                                             bool force,
3784                                             int delayMs,
3785                                             audio_patch_handle_t *patchHandle,
3786                                             const char* address)
3787{
3788    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
3789    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3790    AudioParameter param;
3791    uint32_t muteWaitMs;
3792
3793    if (outputDesc->isDuplicated()) {
3794        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
3795        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
3796        return muteWaitMs;
3797    }
3798    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
3799    // output profile
3800    if ((device != AUDIO_DEVICE_NONE) &&
3801            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
3802        return 0;
3803    }
3804
3805    // filter devices according to output selected
3806    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
3807
3808    audio_devices_t prevDevice = outputDesc->mDevice;
3809
3810    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
3811
3812    if (device != AUDIO_DEVICE_NONE) {
3813        outputDesc->mDevice = device;
3814    }
3815    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
3816
3817    // Do not change the routing if:
3818    //  - the requested device is AUDIO_DEVICE_NONE
3819    //  - the requested device is the same as current device and force is not specified.
3820    // Doing this check here allows the caller to call setOutputDevice() without conditions
3821    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
3822        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
3823        return muteWaitMs;
3824    }
3825
3826    ALOGV("setOutputDevice() changing device");
3827
3828    // do the routing
3829    if (device == AUDIO_DEVICE_NONE) {
3830        resetOutputDevice(output, delayMs, NULL);
3831    } else {
3832        DeviceVector deviceList = (address == NULL) ?
3833                mAvailableOutputDevices.getDevicesFromType(device)
3834                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
3835        if (!deviceList.isEmpty()) {
3836            struct audio_patch patch;
3837            outputDesc->toAudioPortConfig(&patch.sources[0]);
3838            patch.num_sources = 1;
3839            patch.num_sinks = 0;
3840            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
3841                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
3842                patch.num_sinks++;
3843            }
3844            ssize_t index;
3845            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
3846                index = mAudioPatches.indexOfKey(*patchHandle);
3847            } else {
3848                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3849            }
3850            sp< AudioPatch> patchDesc;
3851            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
3852            if (index >= 0) {
3853                patchDesc = mAudioPatches.valueAt(index);
3854                afPatchHandle = patchDesc->mAfPatchHandle;
3855            }
3856
3857            status_t status = mpClientInterface->createAudioPatch(&patch,
3858                                                                   &afPatchHandle,
3859                                                                   delayMs);
3860            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
3861                    "num_sources %d num_sinks %d",
3862                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
3863            if (status == NO_ERROR) {
3864                if (index < 0) {
3865                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
3866                                               &patch, mUidCached);
3867                    addAudioPatch(patchDesc->mHandle, patchDesc);
3868                } else {
3869                    patchDesc->mPatch = patch;
3870                }
3871                patchDesc->mAfPatchHandle = afPatchHandle;
3872                patchDesc->mUid = mUidCached;
3873                if (patchHandle) {
3874                    *patchHandle = patchDesc->mHandle;
3875                }
3876                outputDesc->mPatchHandle = patchDesc->mHandle;
3877                nextAudioPortGeneration();
3878                mpClientInterface->onAudioPatchListUpdate();
3879            }
3880        }
3881    }
3882
3883    // update stream volumes according to new device
3884    applyStreamVolumes(output, device, delayMs);
3885
3886    return muteWaitMs;
3887}
3888
3889status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
3890                                               int delayMs,
3891                                               audio_patch_handle_t *patchHandle)
3892{
3893    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3894    ssize_t index;
3895    if (patchHandle) {
3896        index = mAudioPatches.indexOfKey(*patchHandle);
3897    } else {
3898        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3899    }
3900    if (index < 0) {
3901        return INVALID_OPERATION;
3902    }
3903    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3904    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
3905    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
3906    outputDesc->mPatchHandle = 0;
3907    removeAudioPatch(patchDesc->mHandle);
3908    nextAudioPortGeneration();
3909    mpClientInterface->onAudioPatchListUpdate();
3910    return status;
3911}
3912
3913status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
3914                                            audio_devices_t device,
3915                                            bool force,
3916                                            audio_patch_handle_t *patchHandle)
3917{
3918    status_t status = NO_ERROR;
3919
3920    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3921    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
3922        inputDesc->mDevice = device;
3923
3924        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
3925        if (!deviceList.isEmpty()) {
3926            struct audio_patch patch;
3927            inputDesc->toAudioPortConfig(&patch.sinks[0]);
3928            // AUDIO_SOURCE_HOTWORD is for internal use only:
3929            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
3930            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD) {
3931                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
3932            }
3933            patch.num_sinks = 1;
3934            //only one input device for now
3935            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
3936            patch.num_sources = 1;
3937            ssize_t index;
3938            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
3939                index = mAudioPatches.indexOfKey(*patchHandle);
3940            } else {
3941                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3942            }
3943            sp< AudioPatch> patchDesc;
3944            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
3945            if (index >= 0) {
3946                patchDesc = mAudioPatches.valueAt(index);
3947                afPatchHandle = patchDesc->mAfPatchHandle;
3948            }
3949
3950            status_t status = mpClientInterface->createAudioPatch(&patch,
3951                                                                  &afPatchHandle,
3952                                                                  0);
3953            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
3954                                                                          status, afPatchHandle);
3955            if (status == NO_ERROR) {
3956                if (index < 0) {
3957                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
3958                                               &patch, mUidCached);
3959                    addAudioPatch(patchDesc->mHandle, patchDesc);
3960                } else {
3961                    patchDesc->mPatch = patch;
3962                }
3963                patchDesc->mAfPatchHandle = afPatchHandle;
3964                patchDesc->mUid = mUidCached;
3965                if (patchHandle) {
3966                    *patchHandle = patchDesc->mHandle;
3967                }
3968                inputDesc->mPatchHandle = patchDesc->mHandle;
3969                nextAudioPortGeneration();
3970                mpClientInterface->onAudioPatchListUpdate();
3971            }
3972        }
3973    }
3974    return status;
3975}
3976
3977status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
3978                                              audio_patch_handle_t *patchHandle)
3979{
3980    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3981    ssize_t index;
3982    if (patchHandle) {
3983        index = mAudioPatches.indexOfKey(*patchHandle);
3984    } else {
3985        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3986    }
3987    if (index < 0) {
3988        return INVALID_OPERATION;
3989    }
3990    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3991    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3992    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
3993    inputDesc->mPatchHandle = 0;
3994    removeAudioPatch(patchDesc->mHandle);
3995    nextAudioPortGeneration();
3996    mpClientInterface->onAudioPatchListUpdate();
3997    return status;
3998}
3999
4000sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4001                                                   uint32_t& samplingRate,
4002                                                   audio_format_t format,
4003                                                   audio_channel_mask_t channelMask,
4004                                                   audio_input_flags_t flags)
4005{
4006    // Choose an input profile based on the requested capture parameters: select the first available
4007    // profile supporting all requested parameters.
4008
4009    for (size_t i = 0; i < mHwModules.size(); i++)
4010    {
4011        if (mHwModules[i]->mHandle == 0) {
4012            continue;
4013        }
4014        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4015        {
4016            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4017            // profile->log();
4018            if (profile->isCompatibleProfile(device, samplingRate,
4019                                             &samplingRate /*updatedSamplingRate*/,
4020                                             format, channelMask, (audio_output_flags_t) flags)) {
4021                return profile;
4022            }
4023        }
4024    }
4025    return NULL;
4026}
4027
4028audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4029{
4030    uint32_t device = AUDIO_DEVICE_NONE;
4031    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4032                                            ~AUDIO_DEVICE_BIT_IN;
4033    switch (inputSource) {
4034    case AUDIO_SOURCE_VOICE_UPLINK:
4035      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4036          device = AUDIO_DEVICE_IN_VOICE_CALL;
4037          break;
4038      }
4039      // FALL THROUGH
4040
4041    case AUDIO_SOURCE_DEFAULT:
4042    case AUDIO_SOURCE_MIC:
4043    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4044        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4045        break;
4046    }
4047    // FALL THROUGH
4048
4049    case AUDIO_SOURCE_VOICE_RECOGNITION:
4050    case AUDIO_SOURCE_HOTWORD:
4051    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4052        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4053                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4054            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4055        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4056            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4057        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4058            device = AUDIO_DEVICE_IN_USB_DEVICE;
4059        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4060            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4061        }
4062        break;
4063    case AUDIO_SOURCE_CAMCORDER:
4064        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4065            device = AUDIO_DEVICE_IN_BACK_MIC;
4066        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4067            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4068        }
4069        break;
4070    case AUDIO_SOURCE_VOICE_DOWNLINK:
4071    case AUDIO_SOURCE_VOICE_CALL:
4072        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4073            device = AUDIO_DEVICE_IN_VOICE_CALL;
4074        }
4075        break;
4076    case AUDIO_SOURCE_REMOTE_SUBMIX:
4077        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4078            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4079        }
4080        break;
4081    default:
4082        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4083        break;
4084    }
4085    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4086    return device;
4087}
4088
4089bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4090{
4091    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4092        device &= ~AUDIO_DEVICE_BIT_IN;
4093        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4094            return true;
4095    }
4096    return false;
4097}
4098
4099bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4100    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4101}
4102
4103audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4104{
4105    for (size_t i = 0; i < mInputs.size(); i++) {
4106        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4107        if ((input_descriptor->mRefCount > 0)
4108                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4109            return mInputs.keyAt(i);
4110        }
4111    }
4112    return 0;
4113}
4114
4115
4116audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4117{
4118    if (device == AUDIO_DEVICE_NONE) {
4119        // this happens when forcing a route update and no track is active on an output.
4120        // In this case the returned category is not important.
4121        device =  AUDIO_DEVICE_OUT_SPEAKER;
4122    } else if (popcount(device) > 1) {
4123        // Multiple device selection is either:
4124        //  - speaker + one other device: give priority to speaker in this case.
4125        //  - one A2DP device + another device: happens with duplicated output. In this case
4126        // retain the device on the A2DP output as the other must not correspond to an active
4127        // selection if not the speaker.
4128        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4129            device = AUDIO_DEVICE_OUT_SPEAKER;
4130        } else {
4131            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4132        }
4133    }
4134
4135    ALOGW_IF(popcount(device) != 1,
4136            "getDeviceForVolume() invalid device combination: %08x",
4137            device);
4138
4139    return device;
4140}
4141
4142AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4143{
4144    switch(getDeviceForVolume(device)) {
4145        case AUDIO_DEVICE_OUT_EARPIECE:
4146            return DEVICE_CATEGORY_EARPIECE;
4147        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4148        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4149        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4150        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4151        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4152        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4153            return DEVICE_CATEGORY_HEADSET;
4154        case AUDIO_DEVICE_OUT_SPEAKER:
4155        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4156        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4157        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4158        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4159        case AUDIO_DEVICE_OUT_USB_DEVICE:
4160        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4161        default:
4162            return DEVICE_CATEGORY_SPEAKER;
4163    }
4164}
4165
4166float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4167        int indexInUi)
4168{
4169    device_category deviceCategory = getDeviceCategory(device);
4170    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4171
4172    // the volume index in the UI is relative to the min and max volume indices for this stream type
4173    int nbSteps = 1 + curve[VOLMAX].mIndex -
4174            curve[VOLMIN].mIndex;
4175    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4176            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4177
4178    // find what part of the curve this index volume belongs to, or if it's out of bounds
4179    int segment = 0;
4180    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4181        return 0.0f;
4182    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4183        segment = 0;
4184    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4185        segment = 1;
4186    } else if (volIdx <= curve[VOLMAX].mIndex) {
4187        segment = 2;
4188    } else {                                                               // out of bounds
4189        return 1.0f;
4190    }
4191
4192    // linear interpolation in the attenuation table in dB
4193    float decibels = curve[segment].mDBAttenuation +
4194            ((float)(volIdx - curve[segment].mIndex)) *
4195                ( (curve[segment+1].mDBAttenuation -
4196                        curve[segment].mDBAttenuation) /
4197                    ((float)(curve[segment+1].mIndex -
4198                            curve[segment].mIndex)) );
4199
4200    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4201
4202    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4203            curve[segment].mIndex, volIdx,
4204            curve[segment+1].mIndex,
4205            curve[segment].mDBAttenuation,
4206            decibels,
4207            curve[segment+1].mDBAttenuation,
4208            amplification);
4209
4210    return amplification;
4211}
4212
4213const AudioPolicyManager::VolumeCurvePoint
4214    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4215    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4216};
4217
4218const AudioPolicyManager::VolumeCurvePoint
4219    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4220    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4221};
4222
4223const AudioPolicyManager::VolumeCurvePoint
4224    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4225    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4226};
4227
4228const AudioPolicyManager::VolumeCurvePoint
4229    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4230    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4231};
4232
4233const AudioPolicyManager::VolumeCurvePoint
4234    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4235    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4236};
4237
4238const AudioPolicyManager::VolumeCurvePoint
4239    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4240    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4241};
4242
4243// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4244// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4245// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4246// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4247
4248const AudioPolicyManager::VolumeCurvePoint
4249    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4250    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4251};
4252
4253const AudioPolicyManager::VolumeCurvePoint
4254    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4255    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4256};
4257
4258const AudioPolicyManager::VolumeCurvePoint
4259    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4260    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4261};
4262
4263const AudioPolicyManager::VolumeCurvePoint
4264    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4265    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4266};
4267
4268const AudioPolicyManager::VolumeCurvePoint
4269    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4270    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4271};
4272
4273const AudioPolicyManager::VolumeCurvePoint
4274            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4275                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4276    { // AUDIO_STREAM_VOICE_CALL
4277        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4278        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4279        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4280    },
4281    { // AUDIO_STREAM_SYSTEM
4282        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4283        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4284        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4285    },
4286    { // AUDIO_STREAM_RING
4287        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4288        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4289        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4290    },
4291    { // AUDIO_STREAM_MUSIC
4292        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4293        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4294        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4295    },
4296    { // AUDIO_STREAM_ALARM
4297        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4298        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4299        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4300    },
4301    { // AUDIO_STREAM_NOTIFICATION
4302        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4303        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4304        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4305    },
4306    { // AUDIO_STREAM_BLUETOOTH_SCO
4307        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4308        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4309        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4310    },
4311    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4312        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4313        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4314        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4315    },
4316    {  // AUDIO_STREAM_DTMF
4317        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4318        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4319        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4320    },
4321    { // AUDIO_STREAM_TTS
4322        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4323        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4324        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4325    },
4326};
4327
4328void AudioPolicyManager::initializeVolumeCurves()
4329{
4330    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4331        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4332            mStreams[i].mVolumeCurve[j] =
4333                    sVolumeProfiles[i][j];
4334        }
4335    }
4336
4337    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4338    if (mSpeakerDrcEnabled) {
4339        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4340                sDefaultSystemVolumeCurveDrc;
4341        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4342                sSpeakerSonificationVolumeCurveDrc;
4343        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4344                sSpeakerSonificationVolumeCurveDrc;
4345        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4346                sSpeakerSonificationVolumeCurveDrc;
4347        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4348                sSpeakerMediaVolumeCurveDrc;
4349    }
4350}
4351
4352float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4353                                            int index,
4354                                            audio_io_handle_t output,
4355                                            audio_devices_t device)
4356{
4357    float volume = 1.0;
4358    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4359    StreamDescriptor &streamDesc = mStreams[stream];
4360
4361    if (device == AUDIO_DEVICE_NONE) {
4362        device = outputDesc->device();
4363    }
4364
4365    volume = volIndexToAmpl(device, streamDesc, index);
4366
4367    // if a headset is connected, apply the following rules to ring tones and notifications
4368    // to avoid sound level bursts in user's ears:
4369    // - always attenuate ring tones and notifications volume by 6dB
4370    // - if music is playing, always limit the volume to current music volume,
4371    // with a minimum threshold at -36dB so that notification is always perceived.
4372    const routing_strategy stream_strategy = getStrategy(stream);
4373    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4374            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4375            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4376            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4377        ((stream_strategy == STRATEGY_SONIFICATION)
4378                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4379                || (stream == AUDIO_STREAM_SYSTEM)
4380                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4381                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4382        streamDesc.mCanBeMuted) {
4383        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4384        // when the phone is ringing we must consider that music could have been paused just before
4385        // by the music application and behave as if music was active if the last music track was
4386        // just stopped
4387        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4388                mLimitRingtoneVolume) {
4389            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4390            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4391                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4392                               output,
4393                               musicDevice);
4394            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4395                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4396            if (volume > minVol) {
4397                volume = minVol;
4398                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4399            }
4400        }
4401    }
4402
4403    return volume;
4404}
4405
4406status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4407                                                   int index,
4408                                                   audio_io_handle_t output,
4409                                                   audio_devices_t device,
4410                                                   int delayMs,
4411                                                   bool force)
4412{
4413
4414    // do not change actual stream volume if the stream is muted
4415    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4416        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4417              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4418        return NO_ERROR;
4419    }
4420
4421    // do not change in call volume if bluetooth is connected and vice versa
4422    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4423            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4424        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4425                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4426        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4427             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4428        return INVALID_OPERATION;
4429    }
4430
4431    float volume = computeVolume(stream, index, output, device);
4432    // We actually change the volume if:
4433    // - the float value returned by computeVolume() changed
4434    // - the force flag is set
4435    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4436            force) {
4437        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4438        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4439        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4440        // enabled
4441        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4442            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4443        }
4444        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4445    }
4446
4447    if (stream == AUDIO_STREAM_VOICE_CALL ||
4448        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4449        float voiceVolume;
4450        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4451        if (stream == AUDIO_STREAM_VOICE_CALL) {
4452            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4453        } else {
4454            voiceVolume = 1.0;
4455        }
4456
4457        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4458            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4459            mLastVoiceVolume = voiceVolume;
4460        }
4461    }
4462
4463    return NO_ERROR;
4464}
4465
4466void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4467                                                audio_devices_t device,
4468                                                int delayMs,
4469                                                bool force)
4470{
4471    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4472
4473    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4474        checkAndSetVolume((audio_stream_type_t)stream,
4475                          mStreams[stream].getVolumeIndex(device),
4476                          output,
4477                          device,
4478                          delayMs,
4479                          force);
4480    }
4481}
4482
4483void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4484                                             bool on,
4485                                             audio_io_handle_t output,
4486                                             int delayMs,
4487                                             audio_devices_t device)
4488{
4489    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
4490    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4491        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4492            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
4493        }
4494    }
4495}
4496
4497void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4498                                           bool on,
4499                                           audio_io_handle_t output,
4500                                           int delayMs,
4501                                           audio_devices_t device)
4502{
4503    StreamDescriptor &streamDesc = mStreams[stream];
4504    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4505    if (device == AUDIO_DEVICE_NONE) {
4506        device = outputDesc->device();
4507    }
4508
4509    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
4510          stream, on, output, outputDesc->mMuteCount[stream], device);
4511
4512    if (on) {
4513        if (outputDesc->mMuteCount[stream] == 0) {
4514            if (streamDesc.mCanBeMuted &&
4515                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4516                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
4517                checkAndSetVolume(stream, 0, output, device, delayMs);
4518            }
4519        }
4520        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
4521        outputDesc->mMuteCount[stream]++;
4522    } else {
4523        if (outputDesc->mMuteCount[stream] == 0) {
4524            ALOGV("setStreamMute() unmuting non muted stream!");
4525            return;
4526        }
4527        if (--outputDesc->mMuteCount[stream] == 0) {
4528            checkAndSetVolume(stream,
4529                              streamDesc.getVolumeIndex(device),
4530                              output,
4531                              device,
4532                              delayMs);
4533        }
4534    }
4535}
4536
4537void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
4538                                                      bool starting, bool stateChange)
4539{
4540    // if the stream pertains to sonification strategy and we are in call we must
4541    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
4542    // in the device used for phone strategy and play the tone if the selected device does not
4543    // interfere with the device used for phone strategy
4544    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
4545    // many times as there are active tracks on the output
4546    const routing_strategy stream_strategy = getStrategy(stream);
4547    if ((stream_strategy == STRATEGY_SONIFICATION) ||
4548            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
4549        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
4550        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
4551                stream, starting, outputDesc->mDevice, stateChange);
4552        if (outputDesc->mRefCount[stream]) {
4553            int muteCount = 1;
4554            if (stateChange) {
4555                muteCount = outputDesc->mRefCount[stream];
4556            }
4557            if (audio_is_low_visibility(stream)) {
4558                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
4559                for (int i = 0; i < muteCount; i++) {
4560                    setStreamMute(stream, starting, mPrimaryOutput);
4561                }
4562            } else {
4563                ALOGV("handleIncallSonification() high visibility");
4564                if (outputDesc->device() &
4565                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
4566                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
4567                    for (int i = 0; i < muteCount; i++) {
4568                        setStreamMute(stream, starting, mPrimaryOutput);
4569                    }
4570                }
4571                if (starting) {
4572                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
4573                                                 AUDIO_STREAM_VOICE_CALL);
4574                } else {
4575                    mpClientInterface->stopTone();
4576                }
4577            }
4578        }
4579    }
4580}
4581
4582bool AudioPolicyManager::isInCall()
4583{
4584    return isStateInCall(mPhoneState);
4585}
4586
4587bool AudioPolicyManager::isStateInCall(int state) {
4588    return ((state == AUDIO_MODE_IN_CALL) ||
4589            (state == AUDIO_MODE_IN_COMMUNICATION));
4590}
4591
4592uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
4593{
4594    return MAX_EFFECTS_CPU_LOAD;
4595}
4596
4597uint32_t AudioPolicyManager::getMaxEffectsMemory()
4598{
4599    return MAX_EFFECTS_MEMORY;
4600}
4601
4602
4603// --- AudioOutputDescriptor class implementation
4604
4605AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
4606        const sp<IOProfile>& profile)
4607    : mId(0), mIoHandle(0), mLatency(0),
4608    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
4609    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
4610{
4611    // clear usage count for all stream types
4612    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4613        mRefCount[i] = 0;
4614        mCurVolume[i] = -1.0;
4615        mMuteCount[i] = 0;
4616        mStopTime[i] = 0;
4617    }
4618    for (int i = 0; i < NUM_STRATEGIES; i++) {
4619        mStrategyMutedByDevice[i] = false;
4620    }
4621    if (profile != NULL) {
4622        mAudioPort = profile;
4623        mSamplingRate = profile->pickSamplingRate();
4624        mFormat = profile->pickFormat();
4625        mChannelMask = profile->pickChannelMask();
4626        if (profile->mGains.size() > 0) {
4627            profile->mGains[0]->getDefaultConfig(&mGain);
4628        }
4629        mFlags = profile->mFlags;
4630    }
4631}
4632
4633audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
4634{
4635    if (isDuplicated()) {
4636        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
4637    } else {
4638        return mDevice;
4639    }
4640}
4641
4642uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
4643{
4644    if (isDuplicated()) {
4645        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
4646    } else {
4647        return mLatency;
4648    }
4649}
4650
4651bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
4652        const sp<AudioOutputDescriptor> outputDesc)
4653{
4654    if (isDuplicated()) {
4655        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
4656    } else if (outputDesc->isDuplicated()){
4657        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
4658    } else {
4659        return (mProfile->mModule == outputDesc->mProfile->mModule);
4660    }
4661}
4662
4663void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
4664                                                                   int delta)
4665{
4666    // forward usage count change to attached outputs
4667    if (isDuplicated()) {
4668        mOutput1->changeRefCount(stream, delta);
4669        mOutput2->changeRefCount(stream, delta);
4670    }
4671    if ((delta + (int)mRefCount[stream]) < 0) {
4672        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
4673              delta, stream, mRefCount[stream]);
4674        mRefCount[stream] = 0;
4675        return;
4676    }
4677    mRefCount[stream] += delta;
4678    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
4679}
4680
4681audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
4682{
4683    if (isDuplicated()) {
4684        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
4685    } else {
4686        return mProfile->mSupportedDevices.types() ;
4687    }
4688}
4689
4690bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
4691{
4692    return isStrategyActive(NUM_STRATEGIES, inPastMs);
4693}
4694
4695bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
4696                                                                       uint32_t inPastMs,
4697                                                                       nsecs_t sysTime) const
4698{
4699    if ((sysTime == 0) && (inPastMs != 0)) {
4700        sysTime = systemTime();
4701    }
4702    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
4703        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
4704                (NUM_STRATEGIES == strategy)) &&
4705                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
4706            return true;
4707        }
4708    }
4709    return false;
4710}
4711
4712bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
4713                                                                       uint32_t inPastMs,
4714                                                                       nsecs_t sysTime) const
4715{
4716    if (mRefCount[stream] != 0) {
4717        return true;
4718    }
4719    if (inPastMs == 0) {
4720        return false;
4721    }
4722    if (sysTime == 0) {
4723        sysTime = systemTime();
4724    }
4725    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
4726        return true;
4727    }
4728    return false;
4729}
4730
4731void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
4732                                                 struct audio_port_config *dstConfig,
4733                                                 const struct audio_port_config *srcConfig) const
4734{
4735    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
4736
4737    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
4738                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
4739    if (srcConfig != NULL) {
4740        dstConfig->config_mask |= srcConfig->config_mask;
4741    }
4742    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
4743
4744    dstConfig->id = mId;
4745    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
4746    dstConfig->type = AUDIO_PORT_TYPE_MIX;
4747    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
4748    dstConfig->ext.mix.handle = mIoHandle;
4749    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
4750}
4751
4752void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
4753                                                    struct audio_port *port) const
4754{
4755    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
4756    mProfile->toAudioPort(port);
4757    port->id = mId;
4758    toAudioPortConfig(&port->active_config);
4759    port->ext.mix.hw_module = mProfile->mModule->mHandle;
4760    port->ext.mix.handle = mIoHandle;
4761    port->ext.mix.latency_class =
4762            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
4763}
4764
4765status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
4766{
4767    const size_t SIZE = 256;
4768    char buffer[SIZE];
4769    String8 result;
4770
4771    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
4772    result.append(buffer);
4773    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
4774    result.append(buffer);
4775    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
4776    result.append(buffer);
4777    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
4778    result.append(buffer);
4779    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
4780    result.append(buffer);
4781    snprintf(buffer, SIZE, " Devices %08x\n", device());
4782    result.append(buffer);
4783    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
4784    result.append(buffer);
4785    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
4786        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
4787                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
4788        result.append(buffer);
4789    }
4790    write(fd, result.string(), result.size());
4791
4792    return NO_ERROR;
4793}
4794
4795// --- AudioInputDescriptor class implementation
4796
4797AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
4798    : mId(0), mIoHandle(0),
4799      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
4800      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile)
4801{
4802    if (profile != NULL) {
4803        mAudioPort = profile;
4804        mSamplingRate = profile->pickSamplingRate();
4805        mFormat = profile->pickFormat();
4806        mChannelMask = profile->pickChannelMask();
4807        if (profile->mGains.size() > 0) {
4808            profile->mGains[0]->getDefaultConfig(&mGain);
4809        }
4810    }
4811}
4812
4813void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
4814                                                   struct audio_port_config *dstConfig,
4815                                                   const struct audio_port_config *srcConfig) const
4816{
4817    ALOG_ASSERT(mProfile != 0,
4818                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
4819    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
4820                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
4821    if (srcConfig != NULL) {
4822        dstConfig->config_mask |= srcConfig->config_mask;
4823    }
4824
4825    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
4826
4827    dstConfig->id = mId;
4828    dstConfig->role = AUDIO_PORT_ROLE_SINK;
4829    dstConfig->type = AUDIO_PORT_TYPE_MIX;
4830    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
4831    dstConfig->ext.mix.handle = mIoHandle;
4832    dstConfig->ext.mix.usecase.source = mInputSource;
4833}
4834
4835void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
4836                                                    struct audio_port *port) const
4837{
4838    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
4839
4840    mProfile->toAudioPort(port);
4841    port->id = mId;
4842    toAudioPortConfig(&port->active_config);
4843    port->ext.mix.hw_module = mProfile->mModule->mHandle;
4844    port->ext.mix.handle = mIoHandle;
4845    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
4846}
4847
4848status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
4849{
4850    const size_t SIZE = 256;
4851    char buffer[SIZE];
4852    String8 result;
4853
4854    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
4855    result.append(buffer);
4856    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
4857    result.append(buffer);
4858    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
4859    result.append(buffer);
4860    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
4861    result.append(buffer);
4862    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
4863    result.append(buffer);
4864    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
4865    result.append(buffer);
4866
4867    write(fd, result.string(), result.size());
4868
4869    return NO_ERROR;
4870}
4871
4872// --- StreamDescriptor class implementation
4873
4874AudioPolicyManager::StreamDescriptor::StreamDescriptor()
4875    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
4876{
4877    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
4878}
4879
4880int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
4881{
4882    device = AudioPolicyManager::getDeviceForVolume(device);
4883    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
4884    if (mIndexCur.indexOfKey(device) < 0) {
4885        device = AUDIO_DEVICE_OUT_DEFAULT;
4886    }
4887    return mIndexCur.valueFor(device);
4888}
4889
4890void AudioPolicyManager::StreamDescriptor::dump(int fd)
4891{
4892    const size_t SIZE = 256;
4893    char buffer[SIZE];
4894    String8 result;
4895
4896    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
4897             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
4898    result.append(buffer);
4899    for (size_t i = 0; i < mIndexCur.size(); i++) {
4900        snprintf(buffer, SIZE, "%04x : %02d, ",
4901                 mIndexCur.keyAt(i),
4902                 mIndexCur.valueAt(i));
4903        result.append(buffer);
4904    }
4905    result.append("\n");
4906
4907    write(fd, result.string(), result.size());
4908}
4909
4910// --- EffectDescriptor class implementation
4911
4912status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
4913{
4914    const size_t SIZE = 256;
4915    char buffer[SIZE];
4916    String8 result;
4917
4918    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
4919    result.append(buffer);
4920    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
4921    result.append(buffer);
4922    snprintf(buffer, SIZE, " Session: %d\n", mSession);
4923    result.append(buffer);
4924    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
4925    result.append(buffer);
4926    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
4927    result.append(buffer);
4928    write(fd, result.string(), result.size());
4929
4930    return NO_ERROR;
4931}
4932
4933// --- HwModule class implementation
4934
4935AudioPolicyManager::HwModule::HwModule(const char *name)
4936    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
4937      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
4938{
4939}
4940
4941AudioPolicyManager::HwModule::~HwModule()
4942{
4943    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
4944        mOutputProfiles[i]->mSupportedDevices.clear();
4945    }
4946    for (size_t i = 0; i < mInputProfiles.size(); i++) {
4947        mInputProfiles[i]->mSupportedDevices.clear();
4948    }
4949    free((void *)mName);
4950}
4951
4952status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
4953{
4954    cnode *node = root->first_child;
4955
4956    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
4957
4958    while (node) {
4959        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
4960            profile->loadSamplingRates((char *)node->value);
4961        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
4962            profile->loadFormats((char *)node->value);
4963        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
4964            profile->loadInChannels((char *)node->value);
4965        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
4966            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
4967                                                           mDeclaredDevices);
4968        } else if (strcmp(node->name, GAINS_TAG) == 0) {
4969            profile->loadGains(node);
4970        }
4971        node = node->next;
4972    }
4973    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
4974            "loadInput() invalid supported devices");
4975    ALOGW_IF(profile->mChannelMasks.size() == 0,
4976            "loadInput() invalid supported channel masks");
4977    ALOGW_IF(profile->mSamplingRates.size() == 0,
4978            "loadInput() invalid supported sampling rates");
4979    ALOGW_IF(profile->mFormats.size() == 0,
4980            "loadInput() invalid supported formats");
4981    if (!profile->mSupportedDevices.isEmpty() &&
4982            (profile->mChannelMasks.size() != 0) &&
4983            (profile->mSamplingRates.size() != 0) &&
4984            (profile->mFormats.size() != 0)) {
4985
4986        ALOGV("loadInput() adding input Supported Devices %04x",
4987              profile->mSupportedDevices.types());
4988
4989        mInputProfiles.add(profile);
4990        return NO_ERROR;
4991    } else {
4992        return BAD_VALUE;
4993    }
4994}
4995
4996status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
4997{
4998    cnode *node = root->first_child;
4999
5000    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5001
5002    while (node) {
5003        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5004            profile->loadSamplingRates((char *)node->value);
5005        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5006            profile->loadFormats((char *)node->value);
5007        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5008            profile->loadOutChannels((char *)node->value);
5009        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5010            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5011                                                           mDeclaredDevices);
5012        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5013            profile->mFlags = parseFlagNames((char *)node->value);
5014        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5015            profile->loadGains(node);
5016        }
5017        node = node->next;
5018    }
5019    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5020            "loadOutput() invalid supported devices");
5021    ALOGW_IF(profile->mChannelMasks.size() == 0,
5022            "loadOutput() invalid supported channel masks");
5023    ALOGW_IF(profile->mSamplingRates.size() == 0,
5024            "loadOutput() invalid supported sampling rates");
5025    ALOGW_IF(profile->mFormats.size() == 0,
5026            "loadOutput() invalid supported formats");
5027    if (!profile->mSupportedDevices.isEmpty() &&
5028            (profile->mChannelMasks.size() != 0) &&
5029            (profile->mSamplingRates.size() != 0) &&
5030            (profile->mFormats.size() != 0)) {
5031
5032        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5033              profile->mSupportedDevices.types(), profile->mFlags);
5034
5035        mOutputProfiles.add(profile);
5036        return NO_ERROR;
5037    } else {
5038        return BAD_VALUE;
5039    }
5040}
5041
5042status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5043{
5044    cnode *node = root->first_child;
5045
5046    audio_devices_t type = AUDIO_DEVICE_NONE;
5047    while (node) {
5048        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5049            type = parseDeviceNames((char *)node->value);
5050            break;
5051        }
5052        node = node->next;
5053    }
5054    if (type == AUDIO_DEVICE_NONE ||
5055            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5056        ALOGW("loadDevice() bad type %08x", type);
5057        return BAD_VALUE;
5058    }
5059    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5060    deviceDesc->mModule = this;
5061
5062    node = root->first_child;
5063    while (node) {
5064        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5065            deviceDesc->mAddress = String8((char *)node->value);
5066        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5067            if (audio_is_input_device(type)) {
5068                deviceDesc->loadInChannels((char *)node->value);
5069            } else {
5070                deviceDesc->loadOutChannels((char *)node->value);
5071            }
5072        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5073            deviceDesc->loadGains(node);
5074        }
5075        node = node->next;
5076    }
5077
5078    ALOGV("loadDevice() adding device name %s type %08x address %s",
5079          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5080
5081    mDeclaredDevices.add(deviceDesc);
5082
5083    return NO_ERROR;
5084}
5085
5086void AudioPolicyManager::HwModule::dump(int fd)
5087{
5088    const size_t SIZE = 256;
5089    char buffer[SIZE];
5090    String8 result;
5091
5092    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5093    result.append(buffer);
5094    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5095    result.append(buffer);
5096    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5097    result.append(buffer);
5098    write(fd, result.string(), result.size());
5099    if (mOutputProfiles.size()) {
5100        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5101        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5102            snprintf(buffer, SIZE, "    output %zu:\n", i);
5103            write(fd, buffer, strlen(buffer));
5104            mOutputProfiles[i]->dump(fd);
5105        }
5106    }
5107    if (mInputProfiles.size()) {
5108        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5109        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5110            snprintf(buffer, SIZE, "    input %zu:\n", i);
5111            write(fd, buffer, strlen(buffer));
5112            mInputProfiles[i]->dump(fd);
5113        }
5114    }
5115    if (mDeclaredDevices.size()) {
5116        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5117        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5118            mDeclaredDevices[i]->dump(fd, 4, i);
5119        }
5120    }
5121}
5122
5123// --- AudioPort class implementation
5124
5125
5126AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5127          audio_port_role_t role, const sp<HwModule>& module) :
5128    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5129{
5130    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5131                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5132}
5133
5134void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5135{
5136    port->role = mRole;
5137    port->type = mType;
5138    unsigned int i;
5139    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5140        port->sample_rates[i] = mSamplingRates[i];
5141    }
5142    port->num_sample_rates = i;
5143    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5144        port->channel_masks[i] = mChannelMasks[i];
5145    }
5146    port->num_channel_masks = i;
5147    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5148        port->formats[i] = mFormats[i];
5149    }
5150    port->num_formats = i;
5151
5152    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5153
5154    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5155        port->gains[i] = mGains[i]->mGain;
5156    }
5157    port->num_gains = i;
5158}
5159
5160
5161void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5162{
5163    char *str = strtok(name, "|");
5164
5165    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5166    // rates should be read from the output stream after it is opened for the first time
5167    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5168        mSamplingRates.add(0);
5169        return;
5170    }
5171
5172    while (str != NULL) {
5173        uint32_t rate = atoi(str);
5174        if (rate != 0) {
5175            ALOGV("loadSamplingRates() adding rate %d", rate);
5176            mSamplingRates.add(rate);
5177        }
5178        str = strtok(NULL, "|");
5179    }
5180}
5181
5182void AudioPolicyManager::AudioPort::loadFormats(char *name)
5183{
5184    char *str = strtok(name, "|");
5185
5186    // by convention, "0' in the first entry in mFormats indicates the supported formats
5187    // should be read from the output stream after it is opened for the first time
5188    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5189        mFormats.add(AUDIO_FORMAT_DEFAULT);
5190        return;
5191    }
5192
5193    while (str != NULL) {
5194        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5195                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5196                                                             str);
5197        if (format != AUDIO_FORMAT_DEFAULT) {
5198            mFormats.add(format);
5199        }
5200        str = strtok(NULL, "|");
5201    }
5202}
5203
5204void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5205{
5206    const char *str = strtok(name, "|");
5207
5208    ALOGV("loadInChannels() %s", name);
5209
5210    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5211        mChannelMasks.add(0);
5212        return;
5213    }
5214
5215    while (str != NULL) {
5216        audio_channel_mask_t channelMask =
5217                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5218                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5219                                                   str);
5220        if (channelMask != 0) {
5221            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5222            mChannelMasks.add(channelMask);
5223        }
5224        str = strtok(NULL, "|");
5225    }
5226}
5227
5228void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5229{
5230    const char *str = strtok(name, "|");
5231
5232    ALOGV("loadOutChannels() %s", name);
5233
5234    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5235    // masks should be read from the output stream after it is opened for the first time
5236    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5237        mChannelMasks.add(0);
5238        return;
5239    }
5240
5241    while (str != NULL) {
5242        audio_channel_mask_t channelMask =
5243                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5244                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5245                                                   str);
5246        if (channelMask != 0) {
5247            mChannelMasks.add(channelMask);
5248        }
5249        str = strtok(NULL, "|");
5250    }
5251    return;
5252}
5253
5254audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5255{
5256    const char *str = strtok(name, "|");
5257
5258    ALOGV("loadGainMode() %s", name);
5259    audio_gain_mode_t mode = 0;
5260    while (str != NULL) {
5261        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5262                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5263                                                str);
5264        str = strtok(NULL, "|");
5265    }
5266    return mode;
5267}
5268
5269void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5270{
5271    cnode *node = root->first_child;
5272
5273    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5274
5275    while (node) {
5276        if (strcmp(node->name, GAIN_MODE) == 0) {
5277            gain->mGain.mode = loadGainMode((char *)node->value);
5278        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5279            if (mUseInChannelMask) {
5280                gain->mGain.channel_mask =
5281                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5282                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5283                                                           (char *)node->value);
5284            } else {
5285                gain->mGain.channel_mask =
5286                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5287                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5288                                                           (char *)node->value);
5289            }
5290        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5291            gain->mGain.min_value = atoi((char *)node->value);
5292        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5293            gain->mGain.max_value = atoi((char *)node->value);
5294        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5295            gain->mGain.default_value = atoi((char *)node->value);
5296        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5297            gain->mGain.step_value = atoi((char *)node->value);
5298        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5299            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5300        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5301            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5302        }
5303        node = node->next;
5304    }
5305
5306    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5307          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5308
5309    if (gain->mGain.mode == 0) {
5310        return;
5311    }
5312    mGains.add(gain);
5313}
5314
5315void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5316{
5317    cnode *node = root->first_child;
5318    int index = 0;
5319    while (node) {
5320        ALOGV("loadGains() loading gain %s", node->name);
5321        loadGain(node, index++);
5322        node = node->next;
5323    }
5324}
5325
5326status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5327{
5328    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5329        if (mSamplingRates[i] == samplingRate) {
5330            return NO_ERROR;
5331        }
5332    }
5333    return BAD_VALUE;
5334}
5335
5336status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5337        uint32_t *updatedSamplingRate) const
5338{
5339    // Search for the closest supported sampling rate that is above (preferred)
5340    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5341    // The sampling rates do not need to be sorted in ascending order.
5342    ssize_t maxBelow = -1;
5343    ssize_t minAbove = -1;
5344    uint32_t candidate;
5345    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5346        candidate = mSamplingRates[i];
5347        if (candidate == samplingRate) {
5348            if (updatedSamplingRate != NULL) {
5349                *updatedSamplingRate = candidate;
5350            }
5351            return NO_ERROR;
5352        }
5353        // candidate < desired
5354        if (candidate < samplingRate) {
5355            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5356                maxBelow = i;
5357            }
5358        // candidate > desired
5359        } else {
5360            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5361                minAbove = i;
5362            }
5363        }
5364    }
5365    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5366    // TODO Move these assumptions out.
5367    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5368    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5369                                                    // due to approximation by an int32_t of the
5370                                                    // phase increments
5371    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5372    if (minAbove >= 0) {
5373        candidate = mSamplingRates[minAbove];
5374        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5375            if (updatedSamplingRate != NULL) {
5376                *updatedSamplingRate = candidate;
5377            }
5378            return NO_ERROR;
5379        }
5380    }
5381    // But if we have to up-sample from a lower sampling rate, that's OK.
5382    if (maxBelow >= 0) {
5383        candidate = mSamplingRates[maxBelow];
5384        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5385            if (updatedSamplingRate != NULL) {
5386                *updatedSamplingRate = candidate;
5387            }
5388            return NO_ERROR;
5389        }
5390    }
5391    // leave updatedSamplingRate unmodified
5392    return BAD_VALUE;
5393}
5394
5395status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5396{
5397    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5398        if (mChannelMasks[i] == channelMask) {
5399            return NO_ERROR;
5400        }
5401    }
5402    return BAD_VALUE;
5403}
5404
5405status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5406        const
5407{
5408    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5409    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5410        // FIXME Does not handle multi-channel automatic conversions yet
5411        audio_channel_mask_t supported = mChannelMasks[i];
5412        if (supported == channelMask) {
5413            return NO_ERROR;
5414        }
5415        if (isRecordThread) {
5416            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5417            // FIXME Abstract this out to a table.
5418            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5419                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5420                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5421                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5422                return NO_ERROR;
5423            }
5424        }
5425    }
5426    return BAD_VALUE;
5427}
5428
5429status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
5430{
5431    for (size_t i = 0; i < mFormats.size(); i ++) {
5432        if (mFormats[i] == format) {
5433            return NO_ERROR;
5434        }
5435    }
5436    return BAD_VALUE;
5437}
5438
5439
5440uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
5441{
5442    // special case for uninitialized dynamic profile
5443    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
5444        return 0;
5445    }
5446
5447    uint32_t samplingRate = 0;
5448    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
5449
5450    // For mixed output and inputs, use max mixer sampling rates. Do not
5451    // limit sampling rate otherwise
5452    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5453            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5454            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5455        maxRate = UINT_MAX;
5456    }
5457    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5458        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
5459            samplingRate = mSamplingRates[i];
5460        }
5461    }
5462    return samplingRate;
5463}
5464
5465audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
5466{
5467    // special case for uninitialized dynamic profile
5468    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
5469        return AUDIO_CHANNEL_NONE;
5470    }
5471
5472    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
5473    uint32_t channelCount = 0;
5474    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
5475
5476    // For mixed output and inputs, use max mixer channel count. Do not
5477    // limit channel count otherwise
5478    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5479            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5480            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5481        maxCount = UINT_MAX;
5482    }
5483    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5484        uint32_t cnlCount;
5485        if (mUseInChannelMask) {
5486            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
5487        } else {
5488            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
5489        }
5490        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
5491            channelMask = mChannelMasks[i];
5492        }
5493    }
5494    return channelMask;
5495}
5496
5497const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
5498        AUDIO_FORMAT_DEFAULT,
5499        AUDIO_FORMAT_PCM_16_BIT,
5500        AUDIO_FORMAT_PCM_8_24_BIT,
5501        AUDIO_FORMAT_PCM_24_BIT_PACKED,
5502        AUDIO_FORMAT_PCM_32_BIT,
5503};
5504
5505int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
5506                                                  audio_format_t format2)
5507{
5508    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
5509    // compressed format and better than any PCM format. This is by design of pickFormat()
5510    if (!audio_is_linear_pcm(format1)) {
5511        if (!audio_is_linear_pcm(format2)) {
5512            return 0;
5513        }
5514        return 1;
5515    }
5516    if (!audio_is_linear_pcm(format2)) {
5517        return -1;
5518    }
5519
5520    int index1 = -1, index2 = -1;
5521    for (size_t i = 0;
5522            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
5523            i ++) {
5524        if (sPcmFormatCompareTable[i] == format1) {
5525            index1 = i;
5526        }
5527        if (sPcmFormatCompareTable[i] == format2) {
5528            index2 = i;
5529        }
5530    }
5531    // format1 not found => index1 < 0 => format2 > format1
5532    // format2 not found => index2 < 0 => format2 < format1
5533    return index1 - index2;
5534}
5535
5536audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
5537{
5538    // special case for uninitialized dynamic profile
5539    if (mFormats.size() == 1 && mFormats[0] == 0) {
5540        return AUDIO_FORMAT_DEFAULT;
5541    }
5542
5543    audio_format_t format = AUDIO_FORMAT_DEFAULT;
5544    audio_format_t bestFormat = BEST_MIXER_FORMAT;
5545    // For mixed output and inputs, use best mixer output format. Do not
5546    // limit format otherwise
5547    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5548            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5549             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) == 0)))) {
5550        bestFormat = AUDIO_FORMAT_INVALID;
5551    }
5552
5553    for (size_t i = 0; i < mFormats.size(); i ++) {
5554        if ((compareFormats(mFormats[i], format) > 0) &&
5555                (compareFormats(mFormats[i], bestFormat) <= 0)) {
5556            format = mFormats[i];
5557        }
5558    }
5559    return format;
5560}
5561
5562status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
5563                                                  int index) const
5564{
5565    if (index < 0 || (size_t)index >= mGains.size()) {
5566        return BAD_VALUE;
5567    }
5568    return mGains[index]->checkConfig(gainConfig);
5569}
5570
5571void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
5572{
5573    const size_t SIZE = 256;
5574    char buffer[SIZE];
5575    String8 result;
5576
5577    if (mName.size() != 0) {
5578        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
5579        result.append(buffer);
5580    }
5581
5582    if (mSamplingRates.size() != 0) {
5583        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
5584        result.append(buffer);
5585        for (size_t i = 0; i < mSamplingRates.size(); i++) {
5586            if (i == 0 && mSamplingRates[i] == 0) {
5587                snprintf(buffer, SIZE, "Dynamic");
5588            } else {
5589                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
5590            }
5591            result.append(buffer);
5592            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
5593        }
5594        result.append("\n");
5595    }
5596
5597    if (mChannelMasks.size() != 0) {
5598        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
5599        result.append(buffer);
5600        for (size_t i = 0; i < mChannelMasks.size(); i++) {
5601            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
5602
5603            if (i == 0 && mChannelMasks[i] == 0) {
5604                snprintf(buffer, SIZE, "Dynamic");
5605            } else {
5606                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
5607            }
5608            result.append(buffer);
5609            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
5610        }
5611        result.append("\n");
5612    }
5613
5614    if (mFormats.size() != 0) {
5615        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
5616        result.append(buffer);
5617        for (size_t i = 0; i < mFormats.size(); i++) {
5618            const char *formatStr = enumToString(sFormatNameToEnumTable,
5619                                                 ARRAY_SIZE(sFormatNameToEnumTable),
5620                                                 mFormats[i]);
5621            if (i == 0 && strcmp(formatStr, "") == 0) {
5622                snprintf(buffer, SIZE, "Dynamic");
5623            } else {
5624                snprintf(buffer, SIZE, "%-48s", formatStr);
5625            }
5626            result.append(buffer);
5627            result.append(i == (mFormats.size() - 1) ? "" : ", ");
5628        }
5629        result.append("\n");
5630    }
5631    write(fd, result.string(), result.size());
5632    if (mGains.size() != 0) {
5633        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
5634        write(fd, buffer, strlen(buffer) + 1);
5635        result.append(buffer);
5636        for (size_t i = 0; i < mGains.size(); i++) {
5637            mGains[i]->dump(fd, spaces + 2, i);
5638        }
5639    }
5640}
5641
5642// --- AudioGain class implementation
5643
5644AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
5645{
5646    mIndex = index;
5647    mUseInChannelMask = useInChannelMask;
5648    memset(&mGain, 0, sizeof(struct audio_gain));
5649}
5650
5651void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
5652{
5653    config->index = mIndex;
5654    config->mode = mGain.mode;
5655    config->channel_mask = mGain.channel_mask;
5656    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
5657        config->values[0] = mGain.default_value;
5658    } else {
5659        uint32_t numValues;
5660        if (mUseInChannelMask) {
5661            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
5662        } else {
5663            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
5664        }
5665        for (size_t i = 0; i < numValues; i++) {
5666            config->values[i] = mGain.default_value;
5667        }
5668    }
5669    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
5670        config->ramp_duration_ms = mGain.min_ramp_ms;
5671    }
5672}
5673
5674status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
5675{
5676    if ((config->mode & ~mGain.mode) != 0) {
5677        return BAD_VALUE;
5678    }
5679    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
5680        if ((config->values[0] < mGain.min_value) ||
5681                    (config->values[0] > mGain.max_value)) {
5682            return BAD_VALUE;
5683        }
5684    } else {
5685        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
5686            return BAD_VALUE;
5687        }
5688        uint32_t numValues;
5689        if (mUseInChannelMask) {
5690            numValues = audio_channel_count_from_in_mask(config->channel_mask);
5691        } else {
5692            numValues = audio_channel_count_from_out_mask(config->channel_mask);
5693        }
5694        for (size_t i = 0; i < numValues; i++) {
5695            if ((config->values[i] < mGain.min_value) ||
5696                    (config->values[i] > mGain.max_value)) {
5697                return BAD_VALUE;
5698            }
5699        }
5700    }
5701    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
5702        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
5703                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
5704            return BAD_VALUE;
5705        }
5706    }
5707    return NO_ERROR;
5708}
5709
5710void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
5711{
5712    const size_t SIZE = 256;
5713    char buffer[SIZE];
5714    String8 result;
5715
5716    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
5717    result.append(buffer);
5718    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
5719    result.append(buffer);
5720    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
5721    result.append(buffer);
5722    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
5723    result.append(buffer);
5724    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
5725    result.append(buffer);
5726    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
5727    result.append(buffer);
5728    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
5729    result.append(buffer);
5730    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
5731    result.append(buffer);
5732    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
5733    result.append(buffer);
5734
5735    write(fd, result.string(), result.size());
5736}
5737
5738// --- AudioPortConfig class implementation
5739
5740AudioPolicyManager::AudioPortConfig::AudioPortConfig()
5741{
5742    mSamplingRate = 0;
5743    mChannelMask = AUDIO_CHANNEL_NONE;
5744    mFormat = AUDIO_FORMAT_INVALID;
5745    mGain.index = -1;
5746}
5747
5748status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
5749                                                        const struct audio_port_config *config,
5750                                                        struct audio_port_config *backupConfig)
5751{
5752    struct audio_port_config localBackupConfig;
5753    status_t status = NO_ERROR;
5754
5755    localBackupConfig.config_mask = config->config_mask;
5756    toAudioPortConfig(&localBackupConfig);
5757
5758    if (mAudioPort == 0) {
5759        status = NO_INIT;
5760        goto exit;
5761    }
5762    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
5763        status = mAudioPort->checkExactSamplingRate(config->sample_rate);
5764        if (status != NO_ERROR) {
5765            goto exit;
5766        }
5767        mSamplingRate = config->sample_rate;
5768    }
5769    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
5770        status = mAudioPort->checkExactChannelMask(config->channel_mask);
5771        if (status != NO_ERROR) {
5772            goto exit;
5773        }
5774        mChannelMask = config->channel_mask;
5775    }
5776    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
5777        status = mAudioPort->checkFormat(config->format);
5778        if (status != NO_ERROR) {
5779            goto exit;
5780        }
5781        mFormat = config->format;
5782    }
5783    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
5784        status = mAudioPort->checkGain(&config->gain, config->gain.index);
5785        if (status != NO_ERROR) {
5786            goto exit;
5787        }
5788        mGain = config->gain;
5789    }
5790
5791exit:
5792    if (status != NO_ERROR) {
5793        applyAudioPortConfig(&localBackupConfig);
5794    }
5795    if (backupConfig != NULL) {
5796        *backupConfig = localBackupConfig;
5797    }
5798    return status;
5799}
5800
5801void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
5802                                                    struct audio_port_config *dstConfig,
5803                                                    const struct audio_port_config *srcConfig) const
5804{
5805    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
5806        dstConfig->sample_rate = mSamplingRate;
5807        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
5808            dstConfig->sample_rate = srcConfig->sample_rate;
5809        }
5810    } else {
5811        dstConfig->sample_rate = 0;
5812    }
5813    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
5814        dstConfig->channel_mask = mChannelMask;
5815        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
5816            dstConfig->channel_mask = srcConfig->channel_mask;
5817        }
5818    } else {
5819        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
5820    }
5821    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
5822        dstConfig->format = mFormat;
5823        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
5824            dstConfig->format = srcConfig->format;
5825        }
5826    } else {
5827        dstConfig->format = AUDIO_FORMAT_INVALID;
5828    }
5829    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
5830        dstConfig->gain = mGain;
5831        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
5832            dstConfig->gain = srcConfig->gain;
5833        }
5834    } else {
5835        dstConfig->gain.index = -1;
5836    }
5837    if (dstConfig->gain.index != -1) {
5838        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
5839    } else {
5840        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
5841    }
5842}
5843
5844// --- IOProfile class implementation
5845
5846AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
5847                                         const sp<HwModule>& module)
5848    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
5849{
5850}
5851
5852AudioPolicyManager::IOProfile::~IOProfile()
5853{
5854}
5855
5856// checks if the IO profile is compatible with specified parameters.
5857// Sampling rate, format and channel mask must be specified in order to
5858// get a valid a match
5859bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
5860                                                            uint32_t samplingRate,
5861                                                            uint32_t *updatedSamplingRate,
5862                                                            audio_format_t format,
5863                                                            audio_channel_mask_t channelMask,
5864                                                            audio_output_flags_t flags) const
5865{
5866    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
5867    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5868    ALOG_ASSERT(isPlaybackThread != isRecordThread);
5869
5870    if ((mSupportedDevices.types() & device) != device) {
5871        return false;
5872    }
5873
5874    if (samplingRate == 0) {
5875         return false;
5876    }
5877    uint32_t myUpdatedSamplingRate = samplingRate;
5878    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
5879         return false;
5880    }
5881    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
5882            NO_ERROR) {
5883         return false;
5884    }
5885
5886    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
5887        return false;
5888    }
5889
5890    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
5891            checkExactChannelMask(channelMask) != NO_ERROR)) {
5892        return false;
5893    }
5894    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
5895            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
5896        return false;
5897    }
5898
5899    if (isPlaybackThread && (mFlags & flags) != flags) {
5900        return false;
5901    }
5902    // The only input flag that is allowed to be different is the fast flag.
5903    // An existing fast stream is compatible with a normal track request.
5904    // An existing normal stream is compatible with a fast track request,
5905    // but the fast request will be denied by AudioFlinger and converted to normal track.
5906    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
5907            ~AUDIO_INPUT_FLAG_FAST)) {
5908        return false;
5909    }
5910
5911    if (updatedSamplingRate != NULL) {
5912        *updatedSamplingRate = myUpdatedSamplingRate;
5913    }
5914    return true;
5915}
5916
5917void AudioPolicyManager::IOProfile::dump(int fd)
5918{
5919    const size_t SIZE = 256;
5920    char buffer[SIZE];
5921    String8 result;
5922
5923    AudioPort::dump(fd, 4);
5924
5925    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
5926    result.append(buffer);
5927    snprintf(buffer, SIZE, "    - devices:\n");
5928    result.append(buffer);
5929    write(fd, result.string(), result.size());
5930    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
5931        mSupportedDevices[i]->dump(fd, 6, i);
5932    }
5933}
5934
5935void AudioPolicyManager::IOProfile::log()
5936{
5937    const size_t SIZE = 256;
5938    char buffer[SIZE];
5939    String8 result;
5940
5941    ALOGV("    - sampling rates: ");
5942    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5943        ALOGV("  %d", mSamplingRates[i]);
5944    }
5945
5946    ALOGV("    - channel masks: ");
5947    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5948        ALOGV("  0x%04x", mChannelMasks[i]);
5949    }
5950
5951    ALOGV("    - formats: ");
5952    for (size_t i = 0; i < mFormats.size(); i++) {
5953        ALOGV("  0x%08x", mFormats[i]);
5954    }
5955
5956    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
5957    ALOGV("    - flags: 0x%04x\n", mFlags);
5958}
5959
5960
5961// --- DeviceDescriptor implementation
5962
5963
5964AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
5965                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
5966                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
5967                                                              AUDIO_PORT_ROLE_SOURCE,
5968                             NULL),
5969                     mDeviceType(type), mAddress(""), mId(0)
5970{
5971    mAudioPort = this;
5972    if (mGains.size() > 0) {
5973        mGains[0]->getDefaultConfig(&mGain);
5974    }
5975}
5976
5977bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
5978{
5979    // Devices are considered equal if they:
5980    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
5981    // - have the same address or one device does not specify the address
5982    // - have the same channel mask or one device does not specify the channel mask
5983    return (mDeviceType == other->mDeviceType) &&
5984           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
5985           (mChannelMask == 0 || other->mChannelMask == 0 ||
5986                mChannelMask == other->mChannelMask);
5987}
5988
5989void AudioPolicyManager::DeviceVector::refreshTypes()
5990{
5991    mDeviceTypes = AUDIO_DEVICE_NONE;
5992    for(size_t i = 0; i < size(); i++) {
5993        mDeviceTypes |= itemAt(i)->mDeviceType;
5994    }
5995    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
5996}
5997
5998ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
5999{
6000    for(size_t i = 0; i < size(); i++) {
6001        if (item->equals(itemAt(i))) {
6002            return i;
6003        }
6004    }
6005    return -1;
6006}
6007
6008ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6009{
6010    ssize_t ret = indexOf(item);
6011
6012    if (ret < 0) {
6013        ret = SortedVector::add(item);
6014        if (ret >= 0) {
6015            refreshTypes();
6016        }
6017    } else {
6018        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6019        ret = -1;
6020    }
6021    return ret;
6022}
6023
6024ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6025{
6026    size_t i;
6027    ssize_t ret = indexOf(item);
6028
6029    if (ret < 0) {
6030        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6031    } else {
6032        ret = SortedVector::removeAt(ret);
6033        if (ret >= 0) {
6034            refreshTypes();
6035        }
6036    }
6037    return ret;
6038}
6039
6040void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6041{
6042    DeviceVector deviceList;
6043
6044    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6045    types &= ~role_bit;
6046
6047    while (types) {
6048        uint32_t i = 31 - __builtin_clz(types);
6049        uint32_t type = 1 << i;
6050        types &= ~type;
6051        add(new DeviceDescriptor(String8(""), type | role_bit));
6052    }
6053}
6054
6055void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6056                                                           const DeviceVector& declaredDevices)
6057{
6058    char *devName = strtok(name, "|");
6059    while (devName != NULL) {
6060        if (strlen(devName) != 0) {
6061            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6062                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6063                                 devName);
6064            if (type != AUDIO_DEVICE_NONE) {
6065                add(new DeviceDescriptor(String8(""), type));
6066            } else {
6067                sp<DeviceDescriptor> deviceDesc =
6068                        declaredDevices.getDeviceFromName(String8(devName));
6069                if (deviceDesc != 0) {
6070                    add(deviceDesc);
6071                }
6072            }
6073         }
6074        devName = strtok(NULL, "|");
6075     }
6076}
6077
6078sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6079                                                        audio_devices_t type, String8 address) const
6080{
6081    sp<DeviceDescriptor> device;
6082    for (size_t i = 0; i < size(); i++) {
6083        if (itemAt(i)->mDeviceType == type) {
6084            device = itemAt(i);
6085            if (itemAt(i)->mAddress = address) {
6086                break;
6087            }
6088        }
6089    }
6090    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6091          type, address.string(), device.get());
6092    return device;
6093}
6094
6095sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6096                                                                    audio_port_handle_t id) const
6097{
6098    sp<DeviceDescriptor> device;
6099    for (size_t i = 0; i < size(); i++) {
6100        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6101        if (itemAt(i)->mId == id) {
6102            device = itemAt(i);
6103            break;
6104        }
6105    }
6106    return device;
6107}
6108
6109AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6110                                                                        audio_devices_t type) const
6111{
6112    DeviceVector devices;
6113    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6114        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6115            devices.add(itemAt(i));
6116            type &= ~itemAt(i)->mDeviceType;
6117            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6118                  itemAt(i)->mDeviceType, itemAt(i).get());
6119        }
6120    }
6121    return devices;
6122}
6123
6124AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6125        audio_devices_t type, String8 address) const
6126{
6127    DeviceVector devices;
6128    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6129    for (size_t i = 0; i < size(); i++) {
6130        //ALOGV("     at i=%d: device=%x, addr=%s",
6131        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6132        if (itemAt(i)->mDeviceType == type) {
6133            if (itemAt(i)->mAddress == address) {
6134                //ALOGV("      found matching address %s", address.string());
6135                devices.add(itemAt(i));
6136            }
6137        }
6138    }
6139    return devices;
6140}
6141
6142sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6143        const String8& name) const
6144{
6145    sp<DeviceDescriptor> device;
6146    for (size_t i = 0; i < size(); i++) {
6147        if (itemAt(i)->mName == name) {
6148            device = itemAt(i);
6149            break;
6150        }
6151    }
6152    return device;
6153}
6154
6155void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6156                                                    struct audio_port_config *dstConfig,
6157                                                    const struct audio_port_config *srcConfig) const
6158{
6159    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6160    if (srcConfig != NULL) {
6161        dstConfig->config_mask |= srcConfig->config_mask;
6162    }
6163
6164    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6165
6166    dstConfig->id = mId;
6167    dstConfig->role = audio_is_output_device(mDeviceType) ?
6168                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6169    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6170    dstConfig->ext.device.type = mDeviceType;
6171    dstConfig->ext.device.hw_module = mModule->mHandle;
6172    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6173}
6174
6175void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6176{
6177    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6178    AudioPort::toAudioPort(port);
6179    port->id = mId;
6180    toAudioPortConfig(&port->active_config);
6181    port->ext.device.type = mDeviceType;
6182    port->ext.device.hw_module = mModule->mHandle;
6183    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6184}
6185
6186status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6187{
6188    const size_t SIZE = 256;
6189    char buffer[SIZE];
6190    String8 result;
6191
6192    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6193    result.append(buffer);
6194    if (mId != 0) {
6195        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6196        result.append(buffer);
6197    }
6198    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6199                                              enumToString(sDeviceNameToEnumTable,
6200                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6201                                                           mDeviceType));
6202    result.append(buffer);
6203    if (mAddress.size() != 0) {
6204        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6205        result.append(buffer);
6206    }
6207    write(fd, result.string(), result.size());
6208    AudioPort::dump(fd, spaces);
6209
6210    return NO_ERROR;
6211}
6212
6213
6214// --- audio_policy.conf file parsing
6215
6216audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6217{
6218    uint32_t flag = 0;
6219
6220    // it is OK to cast name to non const here as we are not going to use it after
6221    // strtok() modifies it
6222    char *flagName = strtok(name, "|");
6223    while (flagName != NULL) {
6224        if (strlen(flagName) != 0) {
6225            flag |= stringToEnum(sFlagNameToEnumTable,
6226                               ARRAY_SIZE(sFlagNameToEnumTable),
6227                               flagName);
6228        }
6229        flagName = strtok(NULL, "|");
6230    }
6231    //force direct flag if offload flag is set: offloading implies a direct output stream
6232    // and all common behaviors are driven by checking only the direct flag
6233    // this should normally be set appropriately in the policy configuration file
6234    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6235        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6236    }
6237
6238    return (audio_output_flags_t)flag;
6239}
6240
6241audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6242{
6243    uint32_t device = 0;
6244
6245    char *devName = strtok(name, "|");
6246    while (devName != NULL) {
6247        if (strlen(devName) != 0) {
6248            device |= stringToEnum(sDeviceNameToEnumTable,
6249                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6250                                 devName);
6251         }
6252        devName = strtok(NULL, "|");
6253     }
6254    return device;
6255}
6256
6257void AudioPolicyManager::loadHwModule(cnode *root)
6258{
6259    status_t status = NAME_NOT_FOUND;
6260    cnode *node;
6261    sp<HwModule> module = new HwModule(root->name);
6262
6263    node = config_find(root, DEVICES_TAG);
6264    if (node != NULL) {
6265        node = node->first_child;
6266        while (node) {
6267            ALOGV("loadHwModule() loading device %s", node->name);
6268            status_t tmpStatus = module->loadDevice(node);
6269            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6270                status = tmpStatus;
6271            }
6272            node = node->next;
6273        }
6274    }
6275    node = config_find(root, OUTPUTS_TAG);
6276    if (node != NULL) {
6277        node = node->first_child;
6278        while (node) {
6279            ALOGV("loadHwModule() loading output %s", node->name);
6280            status_t tmpStatus = module->loadOutput(node);
6281            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6282                status = tmpStatus;
6283            }
6284            node = node->next;
6285        }
6286    }
6287    node = config_find(root, INPUTS_TAG);
6288    if (node != NULL) {
6289        node = node->first_child;
6290        while (node) {
6291            ALOGV("loadHwModule() loading input %s", node->name);
6292            status_t tmpStatus = module->loadInput(node);
6293            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6294                status = tmpStatus;
6295            }
6296            node = node->next;
6297        }
6298    }
6299    loadGlobalConfig(root, module);
6300
6301    if (status == NO_ERROR) {
6302        mHwModules.add(module);
6303    }
6304}
6305
6306void AudioPolicyManager::loadHwModules(cnode *root)
6307{
6308    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6309    if (node == NULL) {
6310        return;
6311    }
6312
6313    node = node->first_child;
6314    while (node) {
6315        ALOGV("loadHwModules() loading module %s", node->name);
6316        loadHwModule(node);
6317        node = node->next;
6318    }
6319}
6320
6321void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6322{
6323    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6324
6325    if (node == NULL) {
6326        return;
6327    }
6328    DeviceVector declaredDevices;
6329    if (module != NULL) {
6330        declaredDevices = module->mDeclaredDevices;
6331    }
6332
6333    node = node->first_child;
6334    while (node) {
6335        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6336            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6337                                                        declaredDevices);
6338            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6339                  mAvailableOutputDevices.types());
6340        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6341            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6342                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6343                                              (char *)node->value);
6344            if (device != AUDIO_DEVICE_NONE) {
6345                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6346            } else {
6347                ALOGW("loadGlobalConfig() default device not specified");
6348            }
6349            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6350        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6351            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6352                                                       declaredDevices);
6353            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6354        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6355            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6356            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6357        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6358            uint32_t major, minor;
6359            sscanf((char *)node->value, "%u.%u", &major, &minor);
6360            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6361            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6362                  module->mHalVersion, major, minor);
6363        }
6364        node = node->next;
6365    }
6366}
6367
6368status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6369{
6370    cnode *root;
6371    char *data;
6372
6373    data = (char *)load_file(path, NULL);
6374    if (data == NULL) {
6375        return -ENODEV;
6376    }
6377    root = config_node("", "");
6378    config_load(root, data);
6379
6380    loadHwModules(root);
6381    // legacy audio_policy.conf files have one global_configuration section
6382    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
6383    config_free(root);
6384    free(root);
6385    free(data);
6386
6387    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
6388
6389    return NO_ERROR;
6390}
6391
6392void AudioPolicyManager::defaultAudioPolicyConfig(void)
6393{
6394    sp<HwModule> module;
6395    sp<IOProfile> profile;
6396    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
6397                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
6398    mAvailableOutputDevices.add(mDefaultOutputDevice);
6399    mAvailableInputDevices.add(defaultInputDevice);
6400
6401    module = new HwModule("primary");
6402
6403    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
6404    profile->mSamplingRates.add(44100);
6405    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6406    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
6407    profile->mSupportedDevices.add(mDefaultOutputDevice);
6408    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
6409    module->mOutputProfiles.add(profile);
6410
6411    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
6412    profile->mSamplingRates.add(8000);
6413    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6414    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
6415    profile->mSupportedDevices.add(defaultInputDevice);
6416    module->mInputProfiles.add(profile);
6417
6418    mHwModules.add(module);
6419}
6420
6421audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
6422{
6423    // flags to stream type mapping
6424    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
6425        return AUDIO_STREAM_ENFORCED_AUDIBLE;
6426    }
6427    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
6428        return AUDIO_STREAM_BLUETOOTH_SCO;
6429    }
6430
6431    // usage to stream type mapping
6432    switch (attr->usage) {
6433    case AUDIO_USAGE_MEDIA:
6434    case AUDIO_USAGE_GAME:
6435    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
6436    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
6437        return AUDIO_STREAM_MUSIC;
6438    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
6439        return AUDIO_STREAM_SYSTEM;
6440    case AUDIO_USAGE_VOICE_COMMUNICATION:
6441        return AUDIO_STREAM_VOICE_CALL;
6442
6443    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
6444        return AUDIO_STREAM_DTMF;
6445
6446    case AUDIO_USAGE_ALARM:
6447        return AUDIO_STREAM_ALARM;
6448    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
6449        return AUDIO_STREAM_RING;
6450
6451    case AUDIO_USAGE_NOTIFICATION:
6452    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
6453    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
6454    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
6455    case AUDIO_USAGE_NOTIFICATION_EVENT:
6456        return AUDIO_STREAM_NOTIFICATION;
6457
6458    case AUDIO_USAGE_UNKNOWN:
6459    default:
6460        return AUDIO_STREAM_MUSIC;
6461    }
6462}
6463}; // namespace android
6464