AudioPolicyManager.cpp revision 3a0fe12fbd08b13e9f57d79b0391186be05072f5 
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_QUAD),
151    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
152    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
153};
154
155const StringToEnum sInChannelsNameToEnumTable[] = {
156    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
157    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
158    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
159};
160
161const StringToEnum sGainModeNameToEnumTable[] = {
162    STRING_TO_ENUM(AUDIO_GAIN_MODE_JOINT),
163    STRING_TO_ENUM(AUDIO_GAIN_MODE_CHANNELS),
164    STRING_TO_ENUM(AUDIO_GAIN_MODE_RAMP),
165};
166
167
168uint32_t AudioPolicyManager::stringToEnum(const struct StringToEnum *table,
169                                              size_t size,
170                                              const char *name)
171{
172    for (size_t i = 0; i < size; i++) {
173        if (strcmp(table[i].name, name) == 0) {
174            ALOGV("stringToEnum() found %s", table[i].name);
175            return table[i].value;
176        }
177    }
178    return 0;
179}
180
181const char *AudioPolicyManager::enumToString(const struct StringToEnum *table,
182                                              size_t size,
183                                              uint32_t value)
184{
185    for (size_t i = 0; i < size; i++) {
186        if (table[i].value == value) {
187            return table[i].name;
188        }
189    }
190    return "";
191}
192
193bool AudioPolicyManager::stringToBool(const char *value)
194{
195    return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0));
196}
197
198
199// ----------------------------------------------------------------------------
200// AudioPolicyInterface implementation
201// ----------------------------------------------------------------------------
202
203
204status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
205                                                          audio_policy_dev_state_t state,
206                                                  const char *device_address)
207{
208    String8 address = String8(device_address);
209
210    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s", device, state, device_address);
211
212    // connect/disconnect only 1 device at a time
213    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
214
215    // handle output devices
216    if (audio_is_output_device(device)) {
217        SortedVector <audio_io_handle_t> outputs;
218
219        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
220        devDesc->mAddress = address;
221        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
222
223        // save a copy of the opened output descriptors before any output is opened or closed
224        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
225        mPreviousOutputs = mOutputs;
226        switch (state)
227        {
228        // handle output device connection
229        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
230            if (index >= 0) {
231                ALOGW("setDeviceConnectionState() device already connected: %x", device);
232                return INVALID_OPERATION;
233            }
234            ALOGV("setDeviceConnectionState() connecting device %x", device);
235
236            // register new device as available
237            index = mAvailableOutputDevices.add(devDesc);
238            if (index >= 0) {
239                mAvailableOutputDevices[index]->mId = nextUniqueId();
240                sp<HwModule> module = getModuleForDevice(device);
241                ALOG_ASSERT(module != NULL, "setDeviceConnectionState():"
242                        "could not find HW module for device %08x", device);
243                mAvailableOutputDevices[index]->mModule = module;
244            } else {
245                return NO_MEMORY;
246            }
247
248            if (checkOutputsForDevice(device, state, outputs, address) != NO_ERROR) {
249                mAvailableOutputDevices.remove(devDesc);
250                return INVALID_OPERATION;
251            }
252            // outputs should never be empty here
253            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
254                    "checkOutputsForDevice() returned no outputs but status OK");
255            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
256                  outputs.size());
257            break;
258        // handle output device disconnection
259        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
260            if (index < 0) {
261                ALOGW("setDeviceConnectionState() device not connected: %x", device);
262                return INVALID_OPERATION;
263            }
264
265            ALOGV("setDeviceConnectionState() disconnecting device %x", device);
266            // remove device from available output devices
267            mAvailableOutputDevices.remove(devDesc);
268
269            checkOutputsForDevice(device, state, outputs, address);
270            } break;
271
272        default:
273            ALOGE("setDeviceConnectionState() invalid state: %x", state);
274            return BAD_VALUE;
275        }
276
277        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
278        // output is suspended before any tracks are moved to it
279        checkA2dpSuspend();
280        checkOutputForAllStrategies();
281        // outputs must be closed after checkOutputForAllStrategies() is executed
282        if (!outputs.isEmpty()) {
283            for (size_t i = 0; i < outputs.size(); i++) {
284                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
285                // close unused outputs after device disconnection or direct outputs that have been
286                // opened by checkOutputsForDevice() to query dynamic parameters
287                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
288                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
289                         (desc->mDirectOpenCount == 0))) {
290                    closeOutput(outputs[i]);
291                }
292            }
293            // check again after closing A2DP output to reset mA2dpSuspended if needed
294            checkA2dpSuspend();
295        }
296
297        updateDevicesAndOutputs();
298        for (size_t i = 0; i < mOutputs.size(); i++) {
299            // do not force device change on duplicated output because if device is 0, it will
300            // also force a device 0 for the two outputs it is duplicated to which may override
301            // a valid device selection on those outputs.
302            bool force = !mOutputs.valueAt(i)->isDuplicated()
303                    && (!deviceDistinguishesOnAddress(device)
304                            // always force when disconnecting (a non-duplicated device)
305                            || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
306            setOutputDevice(mOutputs.keyAt(i),
307                            getNewOutputDevice(mOutputs.keyAt(i), true /*fromCache*/),
308                            force, 0);
309        }
310
311        mpClientInterface->onAudioPortListUpdate();
312        return NO_ERROR;
313    }  // end if is output device
314
315    // handle input devices
316    if (audio_is_input_device(device)) {
317        SortedVector <audio_io_handle_t> inputs;
318
319        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
320        devDesc->mAddress = address;
321        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
322        switch (state)
323        {
324        // handle input device connection
325        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
326            if (index >= 0) {
327                ALOGW("setDeviceConnectionState() device already connected: %d", device);
328                return INVALID_OPERATION;
329            }
330            sp<HwModule> module = getModuleForDevice(device);
331            if (module == NULL) {
332                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
333                      device);
334                return INVALID_OPERATION;
335            }
336            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
337                return INVALID_OPERATION;
338            }
339
340            index = mAvailableInputDevices.add(devDesc);
341            if (index >= 0) {
342                mAvailableInputDevices[index]->mId = nextUniqueId();
343                mAvailableInputDevices[index]->mModule = module;
344            } else {
345                return NO_MEMORY;
346            }
347        } break;
348
349        // handle input device disconnection
350        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
351            if (index < 0) {
352                ALOGW("setDeviceConnectionState() device not connected: %d", device);
353                return INVALID_OPERATION;
354            }
355            checkInputsForDevice(device, state, inputs, address);
356            mAvailableInputDevices.remove(devDesc);
357        } break;
358
359        default:
360            ALOGE("setDeviceConnectionState() invalid state: %x", state);
361            return BAD_VALUE;
362        }
363
364        closeAllInputs();
365
366        mpClientInterface->onAudioPortListUpdate();
367        return NO_ERROR;
368    } // end if is input device
369
370    ALOGW("setDeviceConnectionState() invalid device: %x", device);
371    return BAD_VALUE;
372}
373
374audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
375                                                  const char *device_address)
376{
377    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
378    String8 address = String8(device_address);
379    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
380    devDesc->mAddress = String8(device_address);
381    ssize_t index;
382    DeviceVector *deviceVector;
383
384    if (audio_is_output_device(device)) {
385        deviceVector = &mAvailableOutputDevices;
386    } else if (audio_is_input_device(device)) {
387        deviceVector = &mAvailableInputDevices;
388    } else {
389        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
390        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
391    }
392
393    index = deviceVector->indexOf(devDesc);
394    if (index >= 0) {
395        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
396    } else {
397        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
398    }
399}
400
401void AudioPolicyManager::setPhoneState(audio_mode_t state)
402{
403    ALOGV("setPhoneState() state %d", state);
404    audio_devices_t newDevice = AUDIO_DEVICE_NONE;
405    if (state < 0 || state >= AUDIO_MODE_CNT) {
406        ALOGW("setPhoneState() invalid state %d", state);
407        return;
408    }
409
410    if (state == mPhoneState ) {
411        ALOGW("setPhoneState() setting same state %d", state);
412        return;
413    }
414
415    // if leaving call state, handle special case of active streams
416    // pertaining to sonification strategy see handleIncallSonification()
417    if (isInCall()) {
418        ALOGV("setPhoneState() in call state management: new state is %d", state);
419        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
420            handleIncallSonification((audio_stream_type_t)stream, false, true);
421        }
422    }
423
424    // store previous phone state for management of sonification strategy below
425    int oldState = mPhoneState;
426    mPhoneState = state;
427    bool force = false;
428
429    // are we entering or starting a call
430    if (!isStateInCall(oldState) && isStateInCall(state)) {
431        ALOGV("  Entering call in setPhoneState()");
432        // force routing command to audio hardware when starting a call
433        // even if no device change is needed
434        force = true;
435        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
436            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
437                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
438        }
439    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
440        ALOGV("  Exiting call in setPhoneState()");
441        // force routing command to audio hardware when exiting a call
442        // even if no device change is needed
443        force = true;
444        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
445            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
446                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
447        }
448    } else if (isStateInCall(state) && (state != oldState)) {
449        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
450        // force routing command to audio hardware when switching between telephony and VoIP
451        // even if no device change is needed
452        force = true;
453    }
454
455    // check for device and output changes triggered by new phone state
456    newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
457    checkA2dpSuspend();
458    checkOutputForAllStrategies();
459    updateDevicesAndOutputs();
460
461    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
462
463    // force routing command to audio hardware when ending call
464    // even if no device change is needed
465    if (isStateInCall(oldState) && newDevice == AUDIO_DEVICE_NONE) {
466        newDevice = hwOutputDesc->device();
467    }
468
469    int delayMs = 0;
470    if (isStateInCall(state)) {
471        nsecs_t sysTime = systemTime();
472        for (size_t i = 0; i < mOutputs.size(); i++) {
473            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
474            // mute media and sonification strategies and delay device switch by the largest
475            // latency of any output where either strategy is active.
476            // This avoid sending the ring tone or music tail into the earpiece or headset.
477            if ((desc->isStrategyActive(STRATEGY_MEDIA,
478                                     SONIFICATION_HEADSET_MUSIC_DELAY,
479                                     sysTime) ||
480                    desc->isStrategyActive(STRATEGY_SONIFICATION,
481                                         SONIFICATION_HEADSET_MUSIC_DELAY,
482                                         sysTime)) &&
483                    (delayMs < (int)desc->mLatency*2)) {
484                delayMs = desc->mLatency*2;
485            }
486            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
487            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
488                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
489            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
490            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
491                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
492        }
493    }
494
495    // change routing is necessary
496    setOutputDevice(mPrimaryOutput, newDevice, force, delayMs);
497
498    // if entering in call state, handle special case of active streams
499    // pertaining to sonification strategy see handleIncallSonification()
500    if (isStateInCall(state)) {
501        ALOGV("setPhoneState() in call state management: new state is %d", state);
502        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
503            handleIncallSonification((audio_stream_type_t)stream, true, true);
504        }
505    }
506
507    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
508    if (state == AUDIO_MODE_RINGTONE &&
509        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
510        mLimitRingtoneVolume = true;
511    } else {
512        mLimitRingtoneVolume = false;
513    }
514}
515
516void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
517                                         audio_policy_forced_cfg_t config)
518{
519    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
520
521    bool forceVolumeReeval = false;
522    switch(usage) {
523    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
524        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
525            config != AUDIO_POLICY_FORCE_NONE) {
526            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
527            return;
528        }
529        forceVolumeReeval = true;
530        mForceUse[usage] = config;
531        break;
532    case AUDIO_POLICY_FORCE_FOR_MEDIA:
533        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
534            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
535            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
536            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
537            config != AUDIO_POLICY_FORCE_NO_BT_A2DP) {
538            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
539            return;
540        }
541        mForceUse[usage] = config;
542        break;
543    case AUDIO_POLICY_FORCE_FOR_RECORD:
544        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
545            config != AUDIO_POLICY_FORCE_NONE) {
546            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
547            return;
548        }
549        mForceUse[usage] = config;
550        break;
551    case AUDIO_POLICY_FORCE_FOR_DOCK:
552        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
553            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
554            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
555            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
556            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
557            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
558        }
559        forceVolumeReeval = true;
560        mForceUse[usage] = config;
561        break;
562    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
563        if (config != AUDIO_POLICY_FORCE_NONE &&
564            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
565            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
566        }
567        forceVolumeReeval = true;
568        mForceUse[usage] = config;
569        break;
570    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
571        if (config != AUDIO_POLICY_FORCE_NONE &&
572            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
573            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
574        }
575        mForceUse[usage] = config;
576        break;
577    default:
578        ALOGW("setForceUse() invalid usage %d", usage);
579        break;
580    }
581
582    // check for device and output changes triggered by new force usage
583    checkA2dpSuspend();
584    checkOutputForAllStrategies();
585    updateDevicesAndOutputs();
586    for (size_t i = 0; i < mOutputs.size(); i++) {
587        audio_io_handle_t output = mOutputs.keyAt(i);
588        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
589        setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
590        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
591            applyStreamVolumes(output, newDevice, 0, true);
592        }
593    }
594
595    audio_io_handle_t activeInput = getActiveInput();
596    if (activeInput != 0) {
597        setInputDevice(activeInput, getNewInputDevice(activeInput));
598    }
599
600}
601
602audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
603{
604    return mForceUse[usage];
605}
606
607void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
608{
609    ALOGV("setSystemProperty() property %s, value %s", property, value);
610}
611
612// Find a direct output profile compatible with the parameters passed, even if the input flags do
613// not explicitly request a direct output
614sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
615                                                               audio_devices_t device,
616                                                               uint32_t samplingRate,
617                                                               audio_format_t format,
618                                                               audio_channel_mask_t channelMask,
619                                                               audio_output_flags_t flags)
620{
621    for (size_t i = 0; i < mHwModules.size(); i++) {
622        if (mHwModules[i]->mHandle == 0) {
623            continue;
624        }
625        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
626            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
627            bool found = profile->isCompatibleProfile(device, samplingRate,
628                    NULL /*updatedSamplingRate*/, format, channelMask,
629                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
630                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
631            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
632                return profile;
633            }
634        }
635    }
636    return 0;
637}
638
639audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
640                                    uint32_t samplingRate,
641                                    audio_format_t format,
642                                    audio_channel_mask_t channelMask,
643                                    audio_output_flags_t flags,
644                                    const audio_offload_info_t *offloadInfo)
645{
646
647    routing_strategy strategy = getStrategy(stream);
648    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
649    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
650          device, stream, samplingRate, format, channelMask, flags);
651
652    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
653            offloadInfo);
654}
655
656audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
657                                    uint32_t samplingRate,
658                                    audio_format_t format,
659                                    audio_channel_mask_t channelMask,
660                                    audio_output_flags_t flags,
661                                    const audio_offload_info_t *offloadInfo)
662{
663    if (attr == NULL) {
664        ALOGE("getOutputForAttr() called with NULL audio attributes");
665        return 0;
666    }
667    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s",
668            attr->usage, attr->content_type, attr->tags);
669
670    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
671    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
672    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
673    ALOGV("getOutputForAttr() device %d, samplingRate %d, format %x, channelMask %x, flags %x",
674          device, samplingRate, format, channelMask, flags);
675
676    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
677    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
678                offloadInfo);
679}
680
681audio_io_handle_t AudioPolicyManager::getOutputForDevice(
682        audio_devices_t device,
683        audio_stream_type_t stream,
684        uint32_t samplingRate,
685        audio_format_t format,
686        audio_channel_mask_t channelMask,
687        audio_output_flags_t flags,
688        const audio_offload_info_t *offloadInfo)
689{
690    audio_io_handle_t output = 0;
691    uint32_t latency = 0;
692
693#ifdef AUDIO_POLICY_TEST
694    if (mCurOutput != 0) {
695        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
696                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
697
698        if (mTestOutputs[mCurOutput] == 0) {
699            ALOGV("getOutput() opening test output");
700            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
701            outputDesc->mDevice = mTestDevice;
702            outputDesc->mSamplingRate = mTestSamplingRate;
703            outputDesc->mFormat = mTestFormat;
704            outputDesc->mChannelMask = mTestChannels;
705            outputDesc->mLatency = mTestLatencyMs;
706            outputDesc->mFlags =
707                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
708            outputDesc->mRefCount[stream] = 0;
709            mTestOutputs[mCurOutput] = mpClientInterface->openOutput(0, &outputDesc->mDevice,
710                                            &outputDesc->mSamplingRate,
711                                            &outputDesc->mFormat,
712                                            &outputDesc->mChannelMask,
713                                            &outputDesc->mLatency,
714                                            outputDesc->mFlags,
715                                            offloadInfo);
716            if (mTestOutputs[mCurOutput]) {
717                AudioParameter outputCmd = AudioParameter();
718                outputCmd.addInt(String8("set_id"),mCurOutput);
719                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
720                addOutput(mTestOutputs[mCurOutput], outputDesc);
721            }
722        }
723        return mTestOutputs[mCurOutput];
724    }
725#endif //AUDIO_POLICY_TEST
726
727    // open a direct output if required by specified parameters
728    //force direct flag if offload flag is set: offloading implies a direct output stream
729    // and all common behaviors are driven by checking only the direct flag
730    // this should normally be set appropriately in the policy configuration file
731    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
732        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
733    }
734
735    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
736    // creating an offloaded track and tearing it down immediately after start when audioflinger
737    // detects there is an active non offloadable effect.
738    // FIXME: We should check the audio session here but we do not have it in this context.
739    // This may prevent offloading in rare situations where effects are left active by apps
740    // in the background.
741    sp<IOProfile> profile;
742    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
743            !isNonOffloadableEffectEnabled()) {
744        profile = getProfileForDirectOutput(device,
745                                           samplingRate,
746                                           format,
747                                           channelMask,
748                                           (audio_output_flags_t)flags);
749    }
750
751    if (profile != 0) {
752        sp<AudioOutputDescriptor> outputDesc = NULL;
753
754        for (size_t i = 0; i < mOutputs.size(); i++) {
755            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
756            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
757                outputDesc = desc;
758                // reuse direct output if currently open and configured with same parameters
759                if ((samplingRate == outputDesc->mSamplingRate) &&
760                        (format == outputDesc->mFormat) &&
761                        (channelMask == outputDesc->mChannelMask)) {
762                    outputDesc->mDirectOpenCount++;
763                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
764                    return mOutputs.keyAt(i);
765                }
766            }
767        }
768        // close direct output if currently open and configured with different parameters
769        if (outputDesc != NULL) {
770            closeOutput(outputDesc->mIoHandle);
771        }
772        outputDesc = new AudioOutputDescriptor(profile);
773        outputDesc->mDevice = device;
774        outputDesc->mSamplingRate = samplingRate;
775        outputDesc->mFormat = format;
776        outputDesc->mChannelMask = channelMask;
777        outputDesc->mLatency = 0;
778        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
779        outputDesc->mRefCount[stream] = 0;
780        outputDesc->mStopTime[stream] = 0;
781        outputDesc->mDirectOpenCount = 1;
782        output = mpClientInterface->openOutput(profile->mModule->mHandle,
783                                        &outputDesc->mDevice,
784                                        &outputDesc->mSamplingRate,
785                                        &outputDesc->mFormat,
786                                        &outputDesc->mChannelMask,
787                                        &outputDesc->mLatency,
788                                        outputDesc->mFlags,
789                                        offloadInfo);
790
791        // only accept an output with the requested parameters
792        if (output == 0 ||
793            (samplingRate != 0 && samplingRate != outputDesc->mSamplingRate) ||
794            (format != AUDIO_FORMAT_DEFAULT && format != outputDesc->mFormat) ||
795            (channelMask != 0 && channelMask != outputDesc->mChannelMask)) {
796            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
797                    "format %d %d, channelMask %04x %04x", output, samplingRate,
798                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
799                    outputDesc->mChannelMask);
800            if (output != 0) {
801                mpClientInterface->closeOutput(output);
802            }
803            return 0;
804        }
805        audio_io_handle_t srcOutput = getOutputForEffect();
806        addOutput(output, outputDesc);
807        audio_io_handle_t dstOutput = getOutputForEffect();
808        if (dstOutput == output) {
809            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
810        }
811        mPreviousOutputs = mOutputs;
812        ALOGV("getOutput() returns new direct output %d", output);
813        mpClientInterface->onAudioPortListUpdate();
814        return output;
815    }
816
817    // ignoring channel mask due to downmix capability in mixer
818
819    // open a non direct output
820
821    // for non direct outputs, only PCM is supported
822    if (audio_is_linear_pcm(format)) {
823        // get which output is suitable for the specified stream. The actual
824        // routing change will happen when startOutput() will be called
825        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
826
827        output = selectOutput(outputs, flags);
828    }
829    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
830            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
831
832    ALOGV("getOutput() returns output %d", output);
833
834    return output;
835}
836
837audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
838                                                       audio_output_flags_t flags)
839{
840    // select one output among several that provide a path to a particular device or set of
841    // devices (the list was previously build by getOutputsForDevice()).
842    // The priority is as follows:
843    // 1: the output with the highest number of requested policy flags
844    // 2: the primary output
845    // 3: the first output in the list
846
847    if (outputs.size() == 0) {
848        return 0;
849    }
850    if (outputs.size() == 1) {
851        return outputs[0];
852    }
853
854    int maxCommonFlags = 0;
855    audio_io_handle_t outputFlags = 0;
856    audio_io_handle_t outputPrimary = 0;
857
858    for (size_t i = 0; i < outputs.size(); i++) {
859        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
860        if (!outputDesc->isDuplicated()) {
861            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
862            if (commonFlags > maxCommonFlags) {
863                outputFlags = outputs[i];
864                maxCommonFlags = commonFlags;
865                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
866            }
867            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
868                outputPrimary = outputs[i];
869            }
870        }
871    }
872
873    if (outputFlags != 0) {
874        return outputFlags;
875    }
876    if (outputPrimary != 0) {
877        return outputPrimary;
878    }
879
880    return outputs[0];
881}
882
883status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
884                                             audio_stream_type_t stream,
885                                             int session)
886{
887    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
888    ssize_t index = mOutputs.indexOfKey(output);
889    if (index < 0) {
890        ALOGW("startOutput() unknown output %d", output);
891        return BAD_VALUE;
892    }
893
894    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
895
896    // increment usage count for this stream on the requested output:
897    // NOTE that the usage count is the same for duplicated output and hardware output which is
898    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
899    outputDesc->changeRefCount(stream, 1);
900
901    if (outputDesc->mRefCount[stream] == 1) {
902        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
903        routing_strategy strategy = getStrategy(stream);
904        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
905                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
906        uint32_t waitMs = 0;
907        bool force = false;
908        for (size_t i = 0; i < mOutputs.size(); i++) {
909            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
910            if (desc != outputDesc) {
911                // force a device change if any other output is managed by the same hw
912                // module and has a current device selection that differs from selected device.
913                // In this case, the audio HAL must receive the new device selection so that it can
914                // change the device currently selected by the other active output.
915                if (outputDesc->sharesHwModuleWith(desc) &&
916                    desc->device() != newDevice) {
917                    force = true;
918                }
919                // wait for audio on other active outputs to be presented when starting
920                // a notification so that audio focus effect can propagate.
921                uint32_t latency = desc->latency();
922                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
923                    waitMs = latency;
924                }
925            }
926        }
927        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
928
929        // handle special case for sonification while in call
930        if (isInCall()) {
931            handleIncallSonification(stream, true, false);
932        }
933
934        // apply volume rules for current stream and device if necessary
935        checkAndSetVolume(stream,
936                          mStreams[stream].getVolumeIndex(newDevice),
937                          output,
938                          newDevice);
939
940        // update the outputs if starting an output with a stream that can affect notification
941        // routing
942        handleNotificationRoutingForStream(stream);
943        if (waitMs > muteWaitMs) {
944            usleep((waitMs - muteWaitMs) * 2 * 1000);
945        }
946    }
947    return NO_ERROR;
948}
949
950
951status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
952                                            audio_stream_type_t stream,
953                                            int session)
954{
955    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
956    ssize_t index = mOutputs.indexOfKey(output);
957    if (index < 0) {
958        ALOGW("stopOutput() unknown output %d", output);
959        return BAD_VALUE;
960    }
961
962    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
963
964    // handle special case for sonification while in call
965    if (isInCall()) {
966        handleIncallSonification(stream, false, false);
967    }
968
969    if (outputDesc->mRefCount[stream] > 0) {
970        // decrement usage count of this stream on the output
971        outputDesc->changeRefCount(stream, -1);
972        // store time at which the stream was stopped - see isStreamActive()
973        if (outputDesc->mRefCount[stream] == 0) {
974            outputDesc->mStopTime[stream] = systemTime();
975            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
976            // delay the device switch by twice the latency because stopOutput() is executed when
977            // the track stop() command is received and at that time the audio track buffer can
978            // still contain data that needs to be drained. The latency only covers the audio HAL
979            // and kernel buffers. Also the latency does not always include additional delay in the
980            // audio path (audio DSP, CODEC ...)
981            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
982
983            // force restoring the device selection on other active outputs if it differs from the
984            // one being selected for this output
985            for (size_t i = 0; i < mOutputs.size(); i++) {
986                audio_io_handle_t curOutput = mOutputs.keyAt(i);
987                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
988                if (curOutput != output &&
989                        desc->isActive() &&
990                        outputDesc->sharesHwModuleWith(desc) &&
991                        (newDevice != desc->device())) {
992                    setOutputDevice(curOutput,
993                                    getNewOutputDevice(curOutput, false /*fromCache*/),
994                                    true,
995                                    outputDesc->mLatency*2);
996                }
997            }
998            // update the outputs if stopping one with a stream that can affect notification routing
999            handleNotificationRoutingForStream(stream);
1000        }
1001        return NO_ERROR;
1002    } else {
1003        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1004        return INVALID_OPERATION;
1005    }
1006}
1007
1008void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1009{
1010    ALOGV("releaseOutput() %d", output);
1011    ssize_t index = mOutputs.indexOfKey(output);
1012    if (index < 0) {
1013        ALOGW("releaseOutput() releasing unknown output %d", output);
1014        return;
1015    }
1016
1017#ifdef AUDIO_POLICY_TEST
1018    int testIndex = testOutputIndex(output);
1019    if (testIndex != 0) {
1020        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1021        if (outputDesc->isActive()) {
1022            mpClientInterface->closeOutput(output);
1023            mOutputs.removeItem(output);
1024            mTestOutputs[testIndex] = 0;
1025        }
1026        return;
1027    }
1028#endif //AUDIO_POLICY_TEST
1029
1030    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1031    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1032        if (desc->mDirectOpenCount <= 0) {
1033            ALOGW("releaseOutput() invalid open count %d for output %d",
1034                                                              desc->mDirectOpenCount, output);
1035            return;
1036        }
1037        if (--desc->mDirectOpenCount == 0) {
1038            closeOutput(output);
1039            // If effects where present on the output, audioflinger moved them to the primary
1040            // output by default: move them back to the appropriate output.
1041            audio_io_handle_t dstOutput = getOutputForEffect();
1042            if (dstOutput != mPrimaryOutput) {
1043                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1044            }
1045            mpClientInterface->onAudioPortListUpdate();
1046        }
1047    }
1048}
1049
1050
1051audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1052                                    uint32_t samplingRate,
1053                                    audio_format_t format,
1054                                    audio_channel_mask_t channelMask,
1055                                    audio_in_acoustics_t acoustics,
1056                                    audio_input_flags_t flags)
1057{
1058    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, acoustics %x, "
1059          "flags %#x",
1060          inputSource, samplingRate, format, channelMask, acoustics, flags);
1061
1062    audio_devices_t device = getDeviceForInputSource(inputSource);
1063
1064    if (device == AUDIO_DEVICE_NONE) {
1065        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1066        return 0;
1067    }
1068
1069    // adapt channel selection to input source
1070    switch (inputSource) {
1071    case AUDIO_SOURCE_VOICE_UPLINK:
1072        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1073        break;
1074    case AUDIO_SOURCE_VOICE_DOWNLINK:
1075        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1076        break;
1077    case AUDIO_SOURCE_VOICE_CALL:
1078        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1079        break;
1080    default:
1081        break;
1082    }
1083
1084    sp<IOProfile> profile = getInputProfile(device,
1085                                         samplingRate,
1086                                         format,
1087                                         channelMask,
1088                                         flags);
1089    if (profile == 0) {
1090        ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1091                "channelMask 0x%X, flags %#x",
1092                device, samplingRate, format, channelMask, flags);
1093        return 0;
1094    }
1095
1096    if (profile->mModule->mHandle == 0) {
1097        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1098        return 0;
1099    }
1100
1101    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1102
1103    inputDesc->mInputSource = inputSource;
1104    inputDesc->mDevice = device;
1105    inputDesc->mSamplingRate = samplingRate;
1106    inputDesc->mFormat = format;
1107    inputDesc->mChannelMask = channelMask;
1108    inputDesc->mRefCount = 0;
1109    inputDesc->mOpenRefCount = 1;
1110
1111    audio_io_handle_t input = mpClientInterface->openInput(profile->mModule->mHandle,
1112                                    &inputDesc->mDevice,
1113                                    &inputDesc->mSamplingRate,
1114                                    &inputDesc->mFormat,
1115                                    &inputDesc->mChannelMask,
1116                                    flags);
1117
1118    // only accept input with the exact requested set of parameters
1119    if (input == 0 ||
1120        (samplingRate != inputDesc->mSamplingRate) ||
1121        (format != inputDesc->mFormat) ||
1122        (channelMask != inputDesc->mChannelMask)) {
1123        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1124                samplingRate, format, channelMask);
1125        if (input != 0) {
1126            mpClientInterface->closeInput(input);
1127        }
1128        return 0;
1129    }
1130    addInput(input, inputDesc);
1131    mpClientInterface->onAudioPortListUpdate();
1132    return input;
1133}
1134
1135status_t AudioPolicyManager::startInput(audio_io_handle_t input)
1136{
1137    ALOGV("startInput() input %d", input);
1138    ssize_t index = mInputs.indexOfKey(input);
1139    if (index < 0) {
1140        ALOGW("startInput() unknown input %d", input);
1141        return BAD_VALUE;
1142    }
1143    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1144
1145    // virtual input devices are compatible with other input devices
1146    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1147
1148        // for a non-virtual input device, check if there is another (non-virtual) active input
1149        audio_io_handle_t activeInput = getActiveInput();
1150        if (activeInput != 0 && activeInput != input) {
1151
1152            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1153            // otherwise the active input continues and the new input cannot be started.
1154            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1155            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1156                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1157                stopInput(activeInput);
1158                releaseInput(activeInput);
1159            } else {
1160                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1161                return INVALID_OPERATION;
1162            }
1163        }
1164    }
1165
1166    if (inputDesc->mRefCount == 0) {
1167        setInputDevice(input, getNewInputDevice(input), true /* force */);
1168
1169        // Automatically enable the remote submix output when input is started.
1170        // For remote submix (a virtual device), we open only one input per capture request.
1171        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1172            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1173                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1174        }
1175    }
1176
1177    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1178
1179    inputDesc->mRefCount++;
1180    return NO_ERROR;
1181}
1182
1183status_t AudioPolicyManager::stopInput(audio_io_handle_t input)
1184{
1185    ALOGV("stopInput() input %d", input);
1186    ssize_t index = mInputs.indexOfKey(input);
1187    if (index < 0) {
1188        ALOGW("stopInput() unknown input %d", input);
1189        return BAD_VALUE;
1190    }
1191    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1192
1193    if (inputDesc->mRefCount == 0) {
1194        ALOGW("stopInput() input %d already stopped", input);
1195        return INVALID_OPERATION;
1196    }
1197
1198    inputDesc->mRefCount--;
1199    if (inputDesc->mRefCount == 0) {
1200
1201        // automatically disable the remote submix output when input is stopped
1202        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1203            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1204                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1205        }
1206
1207        resetInputDevice(input);
1208    }
1209    return NO_ERROR;
1210}
1211
1212void AudioPolicyManager::releaseInput(audio_io_handle_t input)
1213{
1214    ALOGV("releaseInput() %d", input);
1215    ssize_t index = mInputs.indexOfKey(input);
1216    if (index < 0) {
1217        ALOGW("releaseInput() releasing unknown input %d", input);
1218        return;
1219    }
1220    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1221    ALOG_ASSERT(inputDesc != 0);
1222    if (inputDesc->mOpenRefCount == 0) {
1223        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1224        return;
1225    }
1226    inputDesc->mOpenRefCount--;
1227    if (inputDesc->mOpenRefCount > 0) {
1228        ALOGV("releaseInput() exit > 0");
1229        return;
1230    }
1231
1232    mpClientInterface->closeInput(input);
1233    mInputs.removeItem(input);
1234    nextAudioPortGeneration();
1235    mpClientInterface->onAudioPortListUpdate();
1236    ALOGV("releaseInput() exit");
1237}
1238
1239void AudioPolicyManager::closeAllInputs() {
1240    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1241        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1242    }
1243    mInputs.clear();
1244    nextAudioPortGeneration();
1245}
1246
1247void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1248                                            int indexMin,
1249                                            int indexMax)
1250{
1251    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1252    if (indexMin < 0 || indexMin >= indexMax) {
1253        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1254        return;
1255    }
1256    mStreams[stream].mIndexMin = indexMin;
1257    mStreams[stream].mIndexMax = indexMax;
1258}
1259
1260status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1261                                                      int index,
1262                                                      audio_devices_t device)
1263{
1264
1265    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1266        return BAD_VALUE;
1267    }
1268    if (!audio_is_output_device(device)) {
1269        return BAD_VALUE;
1270    }
1271
1272    // Force max volume if stream cannot be muted
1273    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1274
1275    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1276          stream, device, index);
1277
1278    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1279    // clear all device specific values
1280    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1281        mStreams[stream].mIndexCur.clear();
1282    }
1283    mStreams[stream].mIndexCur.add(device, index);
1284
1285    // compute and apply stream volume on all outputs according to connected device
1286    status_t status = NO_ERROR;
1287    for (size_t i = 0; i < mOutputs.size(); i++) {
1288        audio_devices_t curDevice =
1289                getDeviceForVolume(mOutputs.valueAt(i)->device());
1290        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1291            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1292            if (volStatus != NO_ERROR) {
1293                status = volStatus;
1294            }
1295        }
1296    }
1297    return status;
1298}
1299
1300status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1301                                                      int *index,
1302                                                      audio_devices_t device)
1303{
1304    if (index == NULL) {
1305        return BAD_VALUE;
1306    }
1307    if (!audio_is_output_device(device)) {
1308        return BAD_VALUE;
1309    }
1310    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1311    // the strategy the stream belongs to.
1312    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1313        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1314    }
1315    device = getDeviceForVolume(device);
1316
1317    *index =  mStreams[stream].getVolumeIndex(device);
1318    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1319    return NO_ERROR;
1320}
1321
1322audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1323                                            const SortedVector<audio_io_handle_t>& outputs)
1324{
1325    // select one output among several suitable for global effects.
1326    // The priority is as follows:
1327    // 1: An offloaded output. If the effect ends up not being offloadable,
1328    //    AudioFlinger will invalidate the track and the offloaded output
1329    //    will be closed causing the effect to be moved to a PCM output.
1330    // 2: A deep buffer output
1331    // 3: the first output in the list
1332
1333    if (outputs.size() == 0) {
1334        return 0;
1335    }
1336
1337    audio_io_handle_t outputOffloaded = 0;
1338    audio_io_handle_t outputDeepBuffer = 0;
1339
1340    for (size_t i = 0; i < outputs.size(); i++) {
1341        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1342        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1343        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1344            outputOffloaded = outputs[i];
1345        }
1346        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1347            outputDeepBuffer = outputs[i];
1348        }
1349    }
1350
1351    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1352          outputOffloaded, outputDeepBuffer);
1353    if (outputOffloaded != 0) {
1354        return outputOffloaded;
1355    }
1356    if (outputDeepBuffer != 0) {
1357        return outputDeepBuffer;
1358    }
1359
1360    return outputs[0];
1361}
1362
1363audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1364{
1365    // apply simple rule where global effects are attached to the same output as MUSIC streams
1366
1367    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1368    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1369    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1370
1371    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1372    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1373          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1374
1375    return output;
1376}
1377
1378status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1379                                audio_io_handle_t io,
1380                                uint32_t strategy,
1381                                int session,
1382                                int id)
1383{
1384    ssize_t index = mOutputs.indexOfKey(io);
1385    if (index < 0) {
1386        index = mInputs.indexOfKey(io);
1387        if (index < 0) {
1388            ALOGW("registerEffect() unknown io %d", io);
1389            return INVALID_OPERATION;
1390        }
1391    }
1392
1393    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1394        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1395                desc->name, desc->memoryUsage);
1396        return INVALID_OPERATION;
1397    }
1398    mTotalEffectsMemory += desc->memoryUsage;
1399    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1400            desc->name, io, strategy, session, id);
1401    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1402
1403    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1404    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1405    effectDesc->mIo = io;
1406    effectDesc->mStrategy = (routing_strategy)strategy;
1407    effectDesc->mSession = session;
1408    effectDesc->mEnabled = false;
1409
1410    mEffects.add(id, effectDesc);
1411
1412    return NO_ERROR;
1413}
1414
1415status_t AudioPolicyManager::unregisterEffect(int id)
1416{
1417    ssize_t index = mEffects.indexOfKey(id);
1418    if (index < 0) {
1419        ALOGW("unregisterEffect() unknown effect ID %d", id);
1420        return INVALID_OPERATION;
1421    }
1422
1423    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1424
1425    setEffectEnabled(effectDesc, false);
1426
1427    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1428        ALOGW("unregisterEffect() memory %d too big for total %d",
1429                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1430        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1431    }
1432    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1433    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1434            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1435
1436    mEffects.removeItem(id);
1437
1438    return NO_ERROR;
1439}
1440
1441status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1442{
1443    ssize_t index = mEffects.indexOfKey(id);
1444    if (index < 0) {
1445        ALOGW("unregisterEffect() unknown effect ID %d", id);
1446        return INVALID_OPERATION;
1447    }
1448
1449    return setEffectEnabled(mEffects.valueAt(index), enabled);
1450}
1451
1452status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1453{
1454    if (enabled == effectDesc->mEnabled) {
1455        ALOGV("setEffectEnabled(%s) effect already %s",
1456             enabled?"true":"false", enabled?"enabled":"disabled");
1457        return INVALID_OPERATION;
1458    }
1459
1460    if (enabled) {
1461        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1462            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1463                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1464            return INVALID_OPERATION;
1465        }
1466        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1467        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1468    } else {
1469        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1470            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1471                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1472            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1473        }
1474        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1475        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1476    }
1477    effectDesc->mEnabled = enabled;
1478    return NO_ERROR;
1479}
1480
1481bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1482{
1483    for (size_t i = 0; i < mEffects.size(); i++) {
1484        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1485        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1486                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1487            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1488                  effectDesc->mDesc.name, effectDesc->mSession);
1489            return true;
1490        }
1491    }
1492    return false;
1493}
1494
1495bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1496{
1497    nsecs_t sysTime = systemTime();
1498    for (size_t i = 0; i < mOutputs.size(); i++) {
1499        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1500        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1501            return true;
1502        }
1503    }
1504    return false;
1505}
1506
1507bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1508                                                    uint32_t inPastMs) const
1509{
1510    nsecs_t sysTime = systemTime();
1511    for (size_t i = 0; i < mOutputs.size(); i++) {
1512        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1513        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1514                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1515            return true;
1516        }
1517    }
1518    return false;
1519}
1520
1521bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1522{
1523    for (size_t i = 0; i < mInputs.size(); i++) {
1524        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1525        if ((inputDescriptor->mInputSource == (int)source ||
1526                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1527                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1528             && (inputDescriptor->mRefCount > 0)) {
1529            return true;
1530        }
1531    }
1532    return false;
1533}
1534
1535
1536status_t AudioPolicyManager::dump(int fd)
1537{
1538    const size_t SIZE = 256;
1539    char buffer[SIZE];
1540    String8 result;
1541
1542    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1543    result.append(buffer);
1544
1545    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1546    result.append(buffer);
1547    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1548    result.append(buffer);
1549    snprintf(buffer, SIZE, " Force use for communications %d\n",
1550             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1551    result.append(buffer);
1552    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1553    result.append(buffer);
1554    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1555    result.append(buffer);
1556    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1557    result.append(buffer);
1558    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1559    result.append(buffer);
1560    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1561            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1562    result.append(buffer);
1563
1564    snprintf(buffer, SIZE, " Available output devices:\n");
1565    result.append(buffer);
1566    write(fd, result.string(), result.size());
1567    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1568        mAvailableOutputDevices[i]->dump(fd, 2, i);
1569    }
1570    snprintf(buffer, SIZE, "\n Available input devices:\n");
1571    write(fd, buffer, strlen(buffer));
1572    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1573        mAvailableInputDevices[i]->dump(fd, 2, i);
1574    }
1575
1576    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1577    write(fd, buffer, strlen(buffer));
1578    for (size_t i = 0; i < mHwModules.size(); i++) {
1579        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1580        write(fd, buffer, strlen(buffer));
1581        mHwModules[i]->dump(fd);
1582    }
1583
1584    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1585    write(fd, buffer, strlen(buffer));
1586    for (size_t i = 0; i < mOutputs.size(); i++) {
1587        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1588        write(fd, buffer, strlen(buffer));
1589        mOutputs.valueAt(i)->dump(fd);
1590    }
1591
1592    snprintf(buffer, SIZE, "\nInputs dump:\n");
1593    write(fd, buffer, strlen(buffer));
1594    for (size_t i = 0; i < mInputs.size(); i++) {
1595        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1596        write(fd, buffer, strlen(buffer));
1597        mInputs.valueAt(i)->dump(fd);
1598    }
1599
1600    snprintf(buffer, SIZE, "\nStreams dump:\n");
1601    write(fd, buffer, strlen(buffer));
1602    snprintf(buffer, SIZE,
1603             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1604    write(fd, buffer, strlen(buffer));
1605    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1606        snprintf(buffer, SIZE, " %02zu      ", i);
1607        write(fd, buffer, strlen(buffer));
1608        mStreams[i].dump(fd);
1609    }
1610
1611    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1612            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1613    write(fd, buffer, strlen(buffer));
1614
1615    snprintf(buffer, SIZE, "Registered effects:\n");
1616    write(fd, buffer, strlen(buffer));
1617    for (size_t i = 0; i < mEffects.size(); i++) {
1618        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1619        write(fd, buffer, strlen(buffer));
1620        mEffects.valueAt(i)->dump(fd);
1621    }
1622
1623
1624    return NO_ERROR;
1625}
1626
1627// This function checks for the parameters which can be offloaded.
1628// This can be enhanced depending on the capability of the DSP and policy
1629// of the system.
1630bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1631{
1632    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1633     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1634     offloadInfo.sample_rate, offloadInfo.channel_mask,
1635     offloadInfo.format,
1636     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1637     offloadInfo.has_video);
1638
1639    // Check if offload has been disabled
1640    char propValue[PROPERTY_VALUE_MAX];
1641    if (property_get("audio.offload.disable", propValue, "0")) {
1642        if (atoi(propValue) != 0) {
1643            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1644            return false;
1645        }
1646    }
1647
1648    // Check if stream type is music, then only allow offload as of now.
1649    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1650    {
1651        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1652        return false;
1653    }
1654
1655    //TODO: enable audio offloading with video when ready
1656    if (offloadInfo.has_video)
1657    {
1658        ALOGV("isOffloadSupported: has_video == true, returning false");
1659        return false;
1660    }
1661
1662    //If duration is less than minimum value defined in property, return false
1663    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1664        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1665            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1666            return false;
1667        }
1668    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1669        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1670        return false;
1671    }
1672
1673    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1674    // creating an offloaded track and tearing it down immediately after start when audioflinger
1675    // detects there is an active non offloadable effect.
1676    // FIXME: We should check the audio session here but we do not have it in this context.
1677    // This may prevent offloading in rare situations where effects are left active by apps
1678    // in the background.
1679    if (isNonOffloadableEffectEnabled()) {
1680        return false;
1681    }
1682
1683    // See if there is a profile to support this.
1684    // AUDIO_DEVICE_NONE
1685    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1686                                            offloadInfo.sample_rate,
1687                                            offloadInfo.format,
1688                                            offloadInfo.channel_mask,
1689                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1690    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1691    return (profile != 0);
1692}
1693
1694status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1695                                            audio_port_type_t type,
1696                                            unsigned int *num_ports,
1697                                            struct audio_port *ports,
1698                                            unsigned int *generation)
1699{
1700    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1701            generation == NULL) {
1702        return BAD_VALUE;
1703    }
1704    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1705    if (ports == NULL) {
1706        *num_ports = 0;
1707    }
1708
1709    size_t portsWritten = 0;
1710    size_t portsMax = *num_ports;
1711    *num_ports = 0;
1712    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1713        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1714            for (size_t i = 0;
1715                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1716                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1717            }
1718            *num_ports += mAvailableOutputDevices.size();
1719        }
1720        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1721            for (size_t i = 0;
1722                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1723                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1724            }
1725            *num_ports += mAvailableInputDevices.size();
1726        }
1727    }
1728    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1729        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1730            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1731                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1732            }
1733            *num_ports += mInputs.size();
1734        }
1735        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1736            size_t numOutputs = 0;
1737            for (size_t i = 0; i < mOutputs.size(); i++) {
1738                if (!mOutputs[i]->isDuplicated()) {
1739                    numOutputs++;
1740                    if (portsWritten < portsMax) {
1741                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
1742                    }
1743                }
1744            }
1745            *num_ports += numOutputs;
1746        }
1747    }
1748    *generation = curAudioPortGeneration();
1749    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
1750    return NO_ERROR;
1751}
1752
1753status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
1754{
1755    return NO_ERROR;
1756}
1757
1758sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
1759                                                                    audio_port_handle_t id) const
1760{
1761    sp<AudioOutputDescriptor> outputDesc = NULL;
1762    for (size_t i = 0; i < mOutputs.size(); i++) {
1763        outputDesc = mOutputs.valueAt(i);
1764        if (outputDesc->mId == id) {
1765            break;
1766        }
1767    }
1768    return outputDesc;
1769}
1770
1771sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
1772                                                                    audio_port_handle_t id) const
1773{
1774    sp<AudioInputDescriptor> inputDesc = NULL;
1775    for (size_t i = 0; i < mInputs.size(); i++) {
1776        inputDesc = mInputs.valueAt(i);
1777        if (inputDesc->mId == id) {
1778            break;
1779        }
1780    }
1781    return inputDesc;
1782}
1783
1784sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
1785                                                                    audio_devices_t device) const
1786{
1787    sp <HwModule> module;
1788
1789    for (size_t i = 0; i < mHwModules.size(); i++) {
1790        if (mHwModules[i]->mHandle == 0) {
1791            continue;
1792        }
1793        if (audio_is_output_device(device)) {
1794            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1795            {
1796                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
1797                    return mHwModules[i];
1798                }
1799            }
1800        } else {
1801            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
1802                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
1803                        device & ~AUDIO_DEVICE_BIT_IN) {
1804                    return mHwModules[i];
1805                }
1806            }
1807        }
1808    }
1809    return module;
1810}
1811
1812sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
1813{
1814    sp <HwModule> module;
1815
1816    for (size_t i = 0; i < mHwModules.size(); i++)
1817    {
1818        if (strcmp(mHwModules[i]->mName, name) == 0) {
1819            return mHwModules[i];
1820        }
1821    }
1822    return module;
1823}
1824
1825
1826status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
1827                                               audio_patch_handle_t *handle,
1828                                               uid_t uid)
1829{
1830    ALOGV("createAudioPatch()");
1831
1832    if (handle == NULL || patch == NULL) {
1833        return BAD_VALUE;
1834    }
1835    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
1836
1837    if (patch->num_sources > 1 || patch->num_sinks > 1) {
1838        return INVALID_OPERATION;
1839    }
1840    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE ||
1841            patch->sinks[0].role != AUDIO_PORT_ROLE_SINK) {
1842        return INVALID_OPERATION;
1843    }
1844
1845    sp<AudioPatch> patchDesc;
1846    ssize_t index = mAudioPatches.indexOfKey(*handle);
1847
1848    ALOGV("createAudioPatch sink id %d role %d type %d", patch->sinks[0].id, patch->sinks[0].role,
1849                                                         patch->sinks[0].type);
1850    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
1851                                                           patch->sources[0].role,
1852                                                           patch->sources[0].type);
1853
1854    if (index >= 0) {
1855        patchDesc = mAudioPatches.valueAt(index);
1856        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
1857                                                                  mUidCached, patchDesc->mUid, uid);
1858        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
1859            return INVALID_OPERATION;
1860        }
1861    } else {
1862        *handle = 0;
1863    }
1864
1865    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
1866        // TODO add support for mix to mix connection
1867        if (patch->sinks[0].type != AUDIO_PORT_TYPE_DEVICE) {
1868            ALOGV("createAudioPatch() source mix sink not device");
1869            return BAD_VALUE;
1870        }
1871        // output mix to output device connection
1872        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
1873        if (outputDesc == NULL) {
1874            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
1875            return BAD_VALUE;
1876        }
1877        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
1878                                                outputDesc->mIoHandle);
1879        if (patchDesc != 0) {
1880            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
1881                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
1882                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
1883                return BAD_VALUE;
1884            }
1885        }
1886        sp<DeviceDescriptor> devDesc =
1887                mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
1888        if (devDesc == 0) {
1889            ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[0].id);
1890            return BAD_VALUE;
1891        }
1892
1893        if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
1894                                                       patch->sources[0].sample_rate,
1895                                                     NULL,  // updatedSamplingRate
1896                                                     patch->sources[0].format,
1897                                                     patch->sources[0].channel_mask,
1898                                                     AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
1899            ALOGV("createAudioPatch() profile not supported");
1900            return INVALID_OPERATION;
1901        }
1902        // TODO: reconfigure output format and channels here
1903        ALOGV("createAudioPatch() setting device %08x on output %d",
1904                                              devDesc->mDeviceType, outputDesc->mIoHandle);
1905        setOutputDevice(outputDesc->mIoHandle,
1906                        devDesc->mDeviceType,
1907                       true,
1908                       0,
1909                       handle);
1910        index = mAudioPatches.indexOfKey(*handle);
1911        if (index >= 0) {
1912            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
1913                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
1914            }
1915            patchDesc = mAudioPatches.valueAt(index);
1916            patchDesc->mUid = uid;
1917            ALOGV("createAudioPatch() success");
1918        } else {
1919            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
1920            return INVALID_OPERATION;
1921        }
1922    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
1923        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
1924            // input device to input mix connection
1925            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
1926            if (inputDesc == NULL) {
1927                return BAD_VALUE;
1928            }
1929            if (patchDesc != 0) {
1930                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
1931                    return BAD_VALUE;
1932                }
1933            }
1934            sp<DeviceDescriptor> devDesc =
1935                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
1936            if (devDesc == 0) {
1937                return BAD_VALUE;
1938            }
1939
1940            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
1941                                                         patch->sinks[0].sample_rate,
1942                                                         NULL, /*updatedSampleRate*/
1943                                                         patch->sinks[0].format,
1944                                                         patch->sinks[0].channel_mask,
1945                                                         // FIXME for the parameter type,
1946                                                         // and the NONE
1947                                                         (audio_output_flags_t)
1948                                                            AUDIO_INPUT_FLAG_NONE)) {
1949                return INVALID_OPERATION;
1950            }
1951            // TODO: reconfigure output format and channels here
1952            ALOGV("createAudioPatch() setting device %08x on output %d",
1953                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
1954            setInputDevice(inputDesc->mIoHandle,
1955                           devDesc->mDeviceType,
1956                           true,
1957                           handle);
1958            index = mAudioPatches.indexOfKey(*handle);
1959            if (index >= 0) {
1960                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
1961                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
1962                }
1963                patchDesc = mAudioPatches.valueAt(index);
1964                patchDesc->mUid = uid;
1965                ALOGV("createAudioPatch() success");
1966            } else {
1967                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
1968                return INVALID_OPERATION;
1969            }
1970        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
1971            // device to device connection
1972            if (patchDesc != 0) {
1973                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id &&
1974                    patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
1975                    return BAD_VALUE;
1976                }
1977            }
1978
1979            sp<DeviceDescriptor> srcDeviceDesc =
1980                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
1981            sp<DeviceDescriptor> sinkDeviceDesc =
1982                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
1983            if (srcDeviceDesc == 0 || sinkDeviceDesc == 0) {
1984                return BAD_VALUE;
1985            }
1986            //update source and sink with our own data as the data passed in the patch may
1987            // be incomplete.
1988            struct audio_patch newPatch = *patch;
1989            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
1990            sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[0], &patch->sinks[0]);
1991
1992            if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
1993                SortedVector<audio_io_handle_t> outputs =
1994                                        getOutputsForDevice(sinkDeviceDesc->mDeviceType, mOutputs);
1995                // if the sink device is reachable via an opened output stream, request to go via
1996                // this output stream by adding a second source to the patch description
1997                audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
1998                if (output != AUDIO_IO_HANDLE_NONE) {
1999                    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2000                    if (outputDesc->isDuplicated()) {
2001                        return INVALID_OPERATION;
2002                    }
2003                    outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2004                    newPatch.num_sources = 2;
2005                }
2006            }
2007            // TODO: check from routing capabilities in config file and other conflicting patches
2008
2009            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2010            if (index >= 0) {
2011                afPatchHandle = patchDesc->mAfPatchHandle;
2012            }
2013
2014            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2015                                                                  &afPatchHandle,
2016                                                                  0);
2017            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2018                                                                  status, afPatchHandle);
2019            if (status == NO_ERROR) {
2020                if (index < 0) {
2021                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2022                                               &newPatch, uid);
2023                    addAudioPatch(patchDesc->mHandle, patchDesc);
2024                } else {
2025                    patchDesc->mPatch = newPatch;
2026                }
2027                patchDesc->mAfPatchHandle = afPatchHandle;
2028                *handle = patchDesc->mHandle;
2029                nextAudioPortGeneration();
2030                mpClientInterface->onAudioPatchListUpdate();
2031            } else {
2032                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2033                status);
2034                return INVALID_OPERATION;
2035            }
2036        } else {
2037            return BAD_VALUE;
2038        }
2039    } else {
2040        return BAD_VALUE;
2041    }
2042    return NO_ERROR;
2043}
2044
2045status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2046                                                  uid_t uid)
2047{
2048    ALOGV("releaseAudioPatch() patch %d", handle);
2049
2050    ssize_t index = mAudioPatches.indexOfKey(handle);
2051
2052    if (index < 0) {
2053        return BAD_VALUE;
2054    }
2055    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2056    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2057          mUidCached, patchDesc->mUid, uid);
2058    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2059        return INVALID_OPERATION;
2060    }
2061
2062    struct audio_patch *patch = &patchDesc->mPatch;
2063    patchDesc->mUid = mUidCached;
2064    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2065        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2066        if (outputDesc == NULL) {
2067            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2068            return BAD_VALUE;
2069        }
2070
2071        setOutputDevice(outputDesc->mIoHandle,
2072                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2073                       true,
2074                       0,
2075                       NULL);
2076    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2077        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2078            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2079            if (inputDesc == NULL) {
2080                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2081                return BAD_VALUE;
2082            }
2083            setInputDevice(inputDesc->mIoHandle,
2084                           getNewInputDevice(inputDesc->mIoHandle),
2085                           true,
2086                           NULL);
2087        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2088            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2089            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2090            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2091                                                              status, patchDesc->mAfPatchHandle);
2092            removeAudioPatch(patchDesc->mHandle);
2093            nextAudioPortGeneration();
2094            mpClientInterface->onAudioPatchListUpdate();
2095        } else {
2096            return BAD_VALUE;
2097        }
2098    } else {
2099        return BAD_VALUE;
2100    }
2101    return NO_ERROR;
2102}
2103
2104status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2105                                              struct audio_patch *patches,
2106                                              unsigned int *generation)
2107{
2108    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2109            generation == NULL) {
2110        return BAD_VALUE;
2111    }
2112    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2113          *num_patches, patches, mAudioPatches.size());
2114    if (patches == NULL) {
2115        *num_patches = 0;
2116    }
2117
2118    size_t patchesWritten = 0;
2119    size_t patchesMax = *num_patches;
2120    for (size_t i = 0;
2121            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2122        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2123        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2124        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2125              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2126    }
2127    *num_patches = mAudioPatches.size();
2128
2129    *generation = curAudioPortGeneration();
2130    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2131    return NO_ERROR;
2132}
2133
2134status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2135{
2136    ALOGV("setAudioPortConfig()");
2137
2138    if (config == NULL) {
2139        return BAD_VALUE;
2140    }
2141    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2142    // Only support gain configuration for now
2143    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2144        return INVALID_OPERATION;
2145    }
2146
2147    sp<AudioPortConfig> audioPortConfig;
2148    if (config->type == AUDIO_PORT_TYPE_MIX) {
2149        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2150            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2151            if (outputDesc == NULL) {
2152                return BAD_VALUE;
2153            }
2154            ALOG_ASSERT(!outputDesc->isDuplicated(),
2155                        "setAudioPortConfig() called on duplicated output %d",
2156                        outputDesc->mIoHandle);
2157            audioPortConfig = outputDesc;
2158        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2159            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2160            if (inputDesc == NULL) {
2161                return BAD_VALUE;
2162            }
2163            audioPortConfig = inputDesc;
2164        } else {
2165            return BAD_VALUE;
2166        }
2167    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2168        sp<DeviceDescriptor> deviceDesc;
2169        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2170            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2171        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2172            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2173        } else {
2174            return BAD_VALUE;
2175        }
2176        if (deviceDesc == NULL) {
2177            return BAD_VALUE;
2178        }
2179        audioPortConfig = deviceDesc;
2180    } else {
2181        return BAD_VALUE;
2182    }
2183
2184    struct audio_port_config backupConfig;
2185    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2186    if (status == NO_ERROR) {
2187        struct audio_port_config newConfig;
2188        audioPortConfig->toAudioPortConfig(&newConfig, config);
2189        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2190    }
2191    if (status != NO_ERROR) {
2192        audioPortConfig->applyAudioPortConfig(&backupConfig);
2193    }
2194
2195    return status;
2196}
2197
2198void AudioPolicyManager::clearAudioPatches(uid_t uid)
2199{
2200    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2201        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2202        if (patchDesc->mUid == uid) {
2203            // releaseAudioPatch() removes the patch from mAudioPatches
2204            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2205                i--;
2206            }
2207        }
2208    }
2209}
2210
2211status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2212                                           const sp<AudioPatch>& patch)
2213{
2214    ssize_t index = mAudioPatches.indexOfKey(handle);
2215
2216    if (index >= 0) {
2217        ALOGW("addAudioPatch() patch %d already in", handle);
2218        return ALREADY_EXISTS;
2219    }
2220    mAudioPatches.add(handle, patch);
2221    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2222            "sink handle %d",
2223          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2224          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2225    return NO_ERROR;
2226}
2227
2228status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2229{
2230    ssize_t index = mAudioPatches.indexOfKey(handle);
2231
2232    if (index < 0) {
2233        ALOGW("removeAudioPatch() patch %d not in", handle);
2234        return ALREADY_EXISTS;
2235    }
2236    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2237                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2238    mAudioPatches.removeItemsAt(index);
2239    return NO_ERROR;
2240}
2241
2242// ----------------------------------------------------------------------------
2243// AudioPolicyManager
2244// ----------------------------------------------------------------------------
2245
2246uint32_t AudioPolicyManager::nextUniqueId()
2247{
2248    return android_atomic_inc(&mNextUniqueId);
2249}
2250
2251uint32_t AudioPolicyManager::nextAudioPortGeneration()
2252{
2253    return android_atomic_inc(&mAudioPortGeneration);
2254}
2255
2256AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2257    :
2258#ifdef AUDIO_POLICY_TEST
2259    Thread(false),
2260#endif //AUDIO_POLICY_TEST
2261    mPrimaryOutput((audio_io_handle_t)0),
2262    mPhoneState(AUDIO_MODE_NORMAL),
2263    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2264    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2265    mA2dpSuspended(false),
2266    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2267    mAudioPortGeneration(1)
2268{
2269    mUidCached = getuid();
2270    mpClientInterface = clientInterface;
2271
2272    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2273        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2274    }
2275
2276    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2277    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2278        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2279            ALOGE("could not load audio policy configuration file, setting defaults");
2280            defaultAudioPolicyConfig();
2281        }
2282    }
2283    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2284
2285    // must be done after reading the policy
2286    initializeVolumeCurves();
2287
2288    // open all output streams needed to access attached devices
2289    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2290    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2291    for (size_t i = 0; i < mHwModules.size(); i++) {
2292        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2293        if (mHwModules[i]->mHandle == 0) {
2294            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2295            continue;
2296        }
2297        // open all output streams needed to access attached devices
2298        // except for direct output streams that are only opened when they are actually
2299        // required by an app.
2300        // This also validates mAvailableOutputDevices list
2301        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2302        {
2303            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2304
2305            if (outProfile->mSupportedDevices.isEmpty()) {
2306                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2307                continue;
2308            }
2309
2310            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2311            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2312                profileType = mDefaultOutputDevice->mDeviceType;
2313            } else {
2314                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2315            }
2316            if ((profileType & outputDeviceTypes) &&
2317                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2318                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2319
2320                outputDesc->mDevice = profileType;
2321                audio_io_handle_t output = mpClientInterface->openOutput(
2322                                                outProfile->mModule->mHandle,
2323                                                &outputDesc->mDevice,
2324                                                &outputDesc->mSamplingRate,
2325                                                &outputDesc->mFormat,
2326                                                &outputDesc->mChannelMask,
2327                                                &outputDesc->mLatency,
2328                                                outputDesc->mFlags);
2329                if (output == 0) {
2330                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2331                          outputDesc->mDevice,
2332                          mHwModules[i]->mName);
2333                } else {
2334                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2335                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2336                        ssize_t index =
2337                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2338                        // give a valid ID to an attached device once confirmed it is reachable
2339                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2340                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2341                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2342                        }
2343                    }
2344                    if (mPrimaryOutput == 0 &&
2345                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2346                        mPrimaryOutput = output;
2347                    }
2348                    addOutput(output, outputDesc);
2349                    setOutputDevice(output,
2350                                    outputDesc->mDevice,
2351                                    true);
2352                }
2353            }
2354        }
2355        // open input streams needed to access attached devices to validate
2356        // mAvailableInputDevices list
2357        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2358        {
2359            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2360
2361            if (inProfile->mSupportedDevices.isEmpty()) {
2362                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2363                continue;
2364            }
2365
2366            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2367            if (profileType & inputDeviceTypes) {
2368                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2369
2370                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2371                inputDesc->mDevice = profileType;
2372                audio_io_handle_t input = mpClientInterface->openInput(
2373                                                    inProfile->mModule->mHandle,
2374                                                    &inputDesc->mDevice,
2375                                                    &inputDesc->mSamplingRate,
2376                                                    &inputDesc->mFormat,
2377                                                    &inputDesc->mChannelMask,
2378                                                    AUDIO_INPUT_FLAG_NONE /*FIXME*/);
2379
2380                if (input != 0) {
2381                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2382                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2383                        ssize_t index =
2384                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2385                        // give a valid ID to an attached device once confirmed it is reachable
2386                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2387                            mAvailableInputDevices[index]->mId = nextUniqueId();
2388                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2389                        }
2390                    }
2391                    mpClientInterface->closeInput(input);
2392                } else {
2393                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2394                          inputDesc->mDevice,
2395                          mHwModules[i]->mName);
2396                }
2397            }
2398        }
2399    }
2400    // make sure all attached devices have been allocated a unique ID
2401    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2402        if (mAvailableOutputDevices[i]->mId == 0) {
2403            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2404            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2405            continue;
2406        }
2407        i++;
2408    }
2409    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2410        if (mAvailableInputDevices[i]->mId == 0) {
2411            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2412            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2413            continue;
2414        }
2415        i++;
2416    }
2417    // make sure default device is reachable
2418    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2419        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2420    }
2421
2422    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2423
2424    updateDevicesAndOutputs();
2425
2426#ifdef AUDIO_POLICY_TEST
2427    if (mPrimaryOutput != 0) {
2428        AudioParameter outputCmd = AudioParameter();
2429        outputCmd.addInt(String8("set_id"), 0);
2430        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2431
2432        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2433        mTestSamplingRate = 44100;
2434        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2435        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2436        mTestLatencyMs = 0;
2437        mCurOutput = 0;
2438        mDirectOutput = false;
2439        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2440            mTestOutputs[i] = 0;
2441        }
2442
2443        const size_t SIZE = 256;
2444        char buffer[SIZE];
2445        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2446        run(buffer, ANDROID_PRIORITY_AUDIO);
2447    }
2448#endif //AUDIO_POLICY_TEST
2449}
2450
2451AudioPolicyManager::~AudioPolicyManager()
2452{
2453#ifdef AUDIO_POLICY_TEST
2454    exit();
2455#endif //AUDIO_POLICY_TEST
2456   for (size_t i = 0; i < mOutputs.size(); i++) {
2457        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2458   }
2459   for (size_t i = 0; i < mInputs.size(); i++) {
2460        mpClientInterface->closeInput(mInputs.keyAt(i));
2461   }
2462   mAvailableOutputDevices.clear();
2463   mAvailableInputDevices.clear();
2464   mOutputs.clear();
2465   mInputs.clear();
2466   mHwModules.clear();
2467}
2468
2469status_t AudioPolicyManager::initCheck()
2470{
2471    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2472}
2473
2474#ifdef AUDIO_POLICY_TEST
2475bool AudioPolicyManager::threadLoop()
2476{
2477    ALOGV("entering threadLoop()");
2478    while (!exitPending())
2479    {
2480        String8 command;
2481        int valueInt;
2482        String8 value;
2483
2484        Mutex::Autolock _l(mLock);
2485        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2486
2487        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2488        AudioParameter param = AudioParameter(command);
2489
2490        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2491            valueInt != 0) {
2492            ALOGV("Test command %s received", command.string());
2493            String8 target;
2494            if (param.get(String8("target"), target) != NO_ERROR) {
2495                target = "Manager";
2496            }
2497            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2498                param.remove(String8("test_cmd_policy_output"));
2499                mCurOutput = valueInt;
2500            }
2501            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2502                param.remove(String8("test_cmd_policy_direct"));
2503                if (value == "false") {
2504                    mDirectOutput = false;
2505                } else if (value == "true") {
2506                    mDirectOutput = true;
2507                }
2508            }
2509            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2510                param.remove(String8("test_cmd_policy_input"));
2511                mTestInput = valueInt;
2512            }
2513
2514            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2515                param.remove(String8("test_cmd_policy_format"));
2516                int format = AUDIO_FORMAT_INVALID;
2517                if (value == "PCM 16 bits") {
2518                    format = AUDIO_FORMAT_PCM_16_BIT;
2519                } else if (value == "PCM 8 bits") {
2520                    format = AUDIO_FORMAT_PCM_8_BIT;
2521                } else if (value == "Compressed MP3") {
2522                    format = AUDIO_FORMAT_MP3;
2523                }
2524                if (format != AUDIO_FORMAT_INVALID) {
2525                    if (target == "Manager") {
2526                        mTestFormat = format;
2527                    } else if (mTestOutputs[mCurOutput] != 0) {
2528                        AudioParameter outputParam = AudioParameter();
2529                        outputParam.addInt(String8("format"), format);
2530                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2531                    }
2532                }
2533            }
2534            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2535                param.remove(String8("test_cmd_policy_channels"));
2536                int channels = 0;
2537
2538                if (value == "Channels Stereo") {
2539                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2540                } else if (value == "Channels Mono") {
2541                    channels =  AUDIO_CHANNEL_OUT_MONO;
2542                }
2543                if (channels != 0) {
2544                    if (target == "Manager") {
2545                        mTestChannels = channels;
2546                    } else if (mTestOutputs[mCurOutput] != 0) {
2547                        AudioParameter outputParam = AudioParameter();
2548                        outputParam.addInt(String8("channels"), channels);
2549                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2550                    }
2551                }
2552            }
2553            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2554                param.remove(String8("test_cmd_policy_sampleRate"));
2555                if (valueInt >= 0 && valueInt <= 96000) {
2556                    int samplingRate = valueInt;
2557                    if (target == "Manager") {
2558                        mTestSamplingRate = samplingRate;
2559                    } else if (mTestOutputs[mCurOutput] != 0) {
2560                        AudioParameter outputParam = AudioParameter();
2561                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2562                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2563                    }
2564                }
2565            }
2566
2567            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2568                param.remove(String8("test_cmd_policy_reopen"));
2569
2570                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2571                mpClientInterface->closeOutput(mPrimaryOutput);
2572
2573                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2574
2575                mOutputs.removeItem(mPrimaryOutput);
2576
2577                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2578                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2579                mPrimaryOutput = mpClientInterface->openOutput(moduleHandle,
2580                                                &outputDesc->mDevice,
2581                                                &outputDesc->mSamplingRate,
2582                                                &outputDesc->mFormat,
2583                                                &outputDesc->mChannelMask,
2584                                                &outputDesc->mLatency,
2585                                                outputDesc->mFlags);
2586                if (mPrimaryOutput == 0) {
2587                    ALOGE("Failed to reopen hardware output stream, samplingRate: %d, format %d, channels %d",
2588                            outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2589                } else {
2590                    AudioParameter outputCmd = AudioParameter();
2591                    outputCmd.addInt(String8("set_id"), 0);
2592                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2593                    addOutput(mPrimaryOutput, outputDesc);
2594                }
2595            }
2596
2597
2598            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2599        }
2600    }
2601    return false;
2602}
2603
2604void AudioPolicyManager::exit()
2605{
2606    {
2607        AutoMutex _l(mLock);
2608        requestExit();
2609        mWaitWorkCV.signal();
2610    }
2611    requestExitAndWait();
2612}
2613
2614int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2615{
2616    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2617        if (output == mTestOutputs[i]) return i;
2618    }
2619    return 0;
2620}
2621#endif //AUDIO_POLICY_TEST
2622
2623// ---
2624
2625void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2626{
2627    outputDesc->mIoHandle = output;
2628    outputDesc->mId = nextUniqueId();
2629    mOutputs.add(output, outputDesc);
2630    nextAudioPortGeneration();
2631}
2632
2633void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2634{
2635    inputDesc->mIoHandle = input;
2636    inputDesc->mId = nextUniqueId();
2637    mInputs.add(input, inputDesc);
2638    nextAudioPortGeneration();
2639}
2640
2641String8 AudioPolicyManager::addressToParameter(audio_devices_t device, const String8 address)
2642{
2643    if (device & AUDIO_DEVICE_OUT_ALL_A2DP) {
2644        return String8("a2dp_sink_address=")+address;
2645    } else if (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX) {
2646        return String8("mix=")+address;
2647    }
2648    return address;
2649}
2650
2651void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
2652        const String8 address /*in*/,
2653        SortedVector<audio_io_handle_t>& outputs /*out*/) {
2654    // look for a match on the given address on the addresses of the outputs:
2655    // find the address by finding the patch that maps to this output
2656    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
2657    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
2658    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
2659    if (patchIdx >= 0) {
2660        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
2661        const int numSinks = patchDesc->mPatch.num_sinks;
2662        for (ssize_t j=0; j < numSinks; j++) {
2663            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
2664                const char* patchAddr =
2665                        patchDesc->mPatch.sinks[j].ext.device.address;
2666                if (strncmp(patchAddr,
2667                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
2668                    ALOGV("checkOutputsForDevice(): adding opened output %d on same address %s",
2669                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
2670                    outputs.add(desc->mIoHandle);
2671                    break;
2672                }
2673            }
2674        }
2675    }
2676}
2677
2678status_t AudioPolicyManager::checkOutputsForDevice(audio_devices_t device,
2679                                                       audio_policy_dev_state_t state,
2680                                                       SortedVector<audio_io_handle_t>& outputs,
2681                                                       const String8 address)
2682{
2683    sp<AudioOutputDescriptor> desc;
2684
2685    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
2686        // first list already open outputs that can be routed to this device
2687        for (size_t i = 0; i < mOutputs.size(); i++) {
2688            desc = mOutputs.valueAt(i);
2689            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
2690                if (!deviceDistinguishesOnAddress(device)) {
2691                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
2692                    outputs.add(mOutputs.keyAt(i));
2693                } else {
2694                    ALOGV("  checking address match due to device 0x%x", device);
2695                    findIoHandlesByAddress(desc, address, outputs);
2696                }
2697            }
2698        }
2699        // then look for output profiles that can be routed to this device
2700        SortedVector< sp<IOProfile> > profiles;
2701        for (size_t i = 0; i < mHwModules.size(); i++)
2702        {
2703            if (mHwModules[i]->mHandle == 0) {
2704                continue;
2705            }
2706            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2707            {
2708                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2709                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
2710                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
2711                }
2712            }
2713        }
2714
2715        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
2716
2717        if (profiles.isEmpty() && outputs.isEmpty()) {
2718            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
2719            return BAD_VALUE;
2720        }
2721
2722        // open outputs for matching profiles if needed. Direct outputs are also opened to
2723        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
2724        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
2725            sp<IOProfile> profile = profiles[profile_index];
2726
2727            // nothing to do if one output is already opened for this profile
2728            size_t j;
2729            for (j = 0; j < outputs.size(); j++) {
2730                desc = mOutputs.valueFor(outputs.itemAt(j));
2731                if (!desc->isDuplicated() && desc->mProfile == profile) {
2732                    break;
2733                }
2734            }
2735            if (j != outputs.size()) {
2736                continue;
2737            }
2738
2739            ALOGV("opening output for device %08x with params %s profile %p",
2740                                                      device, address.string(), profile.get());
2741            desc = new AudioOutputDescriptor(profile);
2742            desc->mDevice = device;
2743            audio_offload_info_t offloadInfo = AUDIO_INFO_INITIALIZER;
2744            offloadInfo.sample_rate = desc->mSamplingRate;
2745            offloadInfo.format = desc->mFormat;
2746            offloadInfo.channel_mask = desc->mChannelMask;
2747
2748            audio_io_handle_t output = mpClientInterface->openOutput(profile->mModule->mHandle,
2749                                                                       &desc->mDevice,
2750                                                                       &desc->mSamplingRate,
2751                                                                       &desc->mFormat,
2752                                                                       &desc->mChannelMask,
2753                                                                       &desc->mLatency,
2754                                                                       desc->mFlags,
2755                                                                       &offloadInfo);
2756            if (output != 0) {
2757                // Here is where the out_set_parameters() for card & device gets called
2758                if (!address.isEmpty()) {
2759                    mpClientInterface->setParameters(output, addressToParameter(device, address));
2760                }
2761
2762                // Here is where we step through and resolve any "dynamic" fields
2763                String8 reply;
2764                char *value;
2765                if (profile->mSamplingRates[0] == 0) {
2766                    reply = mpClientInterface->getParameters(output,
2767                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
2768                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
2769                              reply.string());
2770                    value = strpbrk((char *)reply.string(), "=");
2771                    if (value != NULL) {
2772                        profile->loadSamplingRates(value + 1);
2773                    }
2774                }
2775                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
2776                    reply = mpClientInterface->getParameters(output,
2777                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
2778                    ALOGV("checkOutputsForDevice() supported formats %s",
2779                              reply.string());
2780                    value = strpbrk((char *)reply.string(), "=");
2781                    if (value != NULL) {
2782                        profile->loadFormats(value + 1);
2783                    }
2784                }
2785                if (profile->mChannelMasks[0] == 0) {
2786                    reply = mpClientInterface->getParameters(output,
2787                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
2788                    ALOGV("checkOutputsForDevice() supported channel masks %s",
2789                              reply.string());
2790                    value = strpbrk((char *)reply.string(), "=");
2791                    if (value != NULL) {
2792                        profile->loadOutChannels(value + 1);
2793                    }
2794                }
2795                if (((profile->mSamplingRates[0] == 0) &&
2796                         (profile->mSamplingRates.size() < 2)) ||
2797                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
2798                         (profile->mFormats.size() < 2)) ||
2799                     ((profile->mChannelMasks[0] == 0) &&
2800                         (profile->mChannelMasks.size() < 2))) {
2801                    ALOGW("checkOutputsForDevice() missing param");
2802                    mpClientInterface->closeOutput(output);
2803                    output = 0;
2804                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
2805                            profile->mChannelMasks[0] == 0) {
2806                    mpClientInterface->closeOutput(output);
2807                    desc->mSamplingRate = profile->pickSamplingRate();
2808                    desc->mFormat = profile->pickFormat();
2809                    desc->mChannelMask = profile->pickChannelMask();
2810                    offloadInfo.sample_rate = desc->mSamplingRate;
2811                    offloadInfo.format = desc->mFormat;
2812                    offloadInfo.channel_mask = desc->mChannelMask;
2813                    output = mpClientInterface->openOutput(
2814                                                    profile->mModule->mHandle,
2815                                                    &desc->mDevice,
2816                                                    &desc->mSamplingRate,
2817                                                    &desc->mFormat,
2818                                                    &desc->mChannelMask,
2819                                                    &desc->mLatency,
2820                                                    desc->mFlags,
2821                                                    &offloadInfo);
2822                }
2823
2824                if (output != 0) {
2825                    addOutput(output, desc);
2826                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
2827                        audio_io_handle_t duplicatedOutput = 0;
2828
2829                        // set initial stream volume for device
2830                        applyStreamVolumes(output, device, 0, true);
2831
2832                        //TODO: configure audio effect output stage here
2833
2834                        // open a duplicating output thread for the new output and the primary output
2835                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
2836                                                                                  mPrimaryOutput);
2837                        if (duplicatedOutput != 0) {
2838                            // add duplicated output descriptor
2839                            sp<AudioOutputDescriptor> dupOutputDesc = new AudioOutputDescriptor(NULL);
2840                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
2841                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
2842                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
2843                            dupOutputDesc->mFormat = desc->mFormat;
2844                            dupOutputDesc->mChannelMask = desc->mChannelMask;
2845                            dupOutputDesc->mLatency = desc->mLatency;
2846                            addOutput(duplicatedOutput, dupOutputDesc);
2847                            applyStreamVolumes(duplicatedOutput, device, 0, true);
2848                        } else {
2849                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
2850                                    mPrimaryOutput, output);
2851                            mpClientInterface->closeOutput(output);
2852                            mOutputs.removeItem(output);
2853                            nextAudioPortGeneration();
2854                            output = 0;
2855                        }
2856                    }
2857                }
2858            }
2859            if (output == 0) {
2860                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
2861                profiles.removeAt(profile_index);
2862                profile_index--;
2863            } else {
2864                outputs.add(output);
2865                if (deviceDistinguishesOnAddress(device)) {
2866                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
2867                            device, address.string());
2868                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
2869                            NULL/*patch handle*/, address.string());
2870                }
2871                ALOGV("checkOutputsForDevice(): adding output %d", output);
2872            }
2873        }
2874
2875        if (profiles.isEmpty()) {
2876            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
2877            return BAD_VALUE;
2878        }
2879    } else { // Disconnect
2880        // check if one opened output is not needed any more after disconnecting one device
2881        for (size_t i = 0; i < mOutputs.size(); i++) {
2882            desc = mOutputs.valueAt(i);
2883            if (!desc->isDuplicated()) {
2884                if  (!(desc->mProfile->mSupportedDevices.types()
2885                        & mAvailableOutputDevices.types())) {
2886                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
2887                            mOutputs.keyAt(i));
2888                    outputs.add(mOutputs.keyAt(i));
2889                } else if (deviceDistinguishesOnAddress(device) &&
2890                        // exact match on device
2891                        (desc->mProfile->mSupportedDevices.types() == device)) {
2892                    findIoHandlesByAddress(desc, address, outputs);
2893                }
2894            }
2895        }
2896        // Clear any profiles associated with the disconnected device.
2897        for (size_t i = 0; i < mHwModules.size(); i++)
2898        {
2899            if (mHwModules[i]->mHandle == 0) {
2900                continue;
2901            }
2902            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2903            {
2904                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
2905                if (profile->mSupportedDevices.types() & device) {
2906                    ALOGV("checkOutputsForDevice(): "
2907                            "clearing direct output profile %zu on module %zu", j, i);
2908                    if (profile->mSamplingRates[0] == 0) {
2909                        profile->mSamplingRates.clear();
2910                        profile->mSamplingRates.add(0);
2911                    }
2912                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
2913                        profile->mFormats.clear();
2914                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
2915                    }
2916                    if (profile->mChannelMasks[0] == 0) {
2917                        profile->mChannelMasks.clear();
2918                        profile->mChannelMasks.add(0);
2919                    }
2920                }
2921            }
2922        }
2923    }
2924    return NO_ERROR;
2925}
2926
2927status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
2928                                                      audio_policy_dev_state_t state,
2929                                                      SortedVector<audio_io_handle_t>& inputs,
2930                                                      const String8 address)
2931{
2932    sp<AudioInputDescriptor> desc;
2933    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
2934        // first list already open inputs that can be routed to this device
2935        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
2936            desc = mInputs.valueAt(input_index);
2937            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
2938                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
2939               inputs.add(mInputs.keyAt(input_index));
2940            }
2941        }
2942
2943        // then look for input profiles that can be routed to this device
2944        SortedVector< sp<IOProfile> > profiles;
2945        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
2946        {
2947            if (mHwModules[module_idx]->mHandle == 0) {
2948                continue;
2949            }
2950            for (size_t profile_index = 0;
2951                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
2952                 profile_index++)
2953            {
2954                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
2955                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
2956                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
2957                          profile_index, module_idx);
2958                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
2959                }
2960            }
2961        }
2962
2963        if (profiles.isEmpty() && inputs.isEmpty()) {
2964            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
2965            return BAD_VALUE;
2966        }
2967
2968        // open inputs for matching profiles if needed. Direct inputs are also opened to
2969        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
2970        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
2971
2972            sp<IOProfile> profile = profiles[profile_index];
2973            // nothing to do if one input is already opened for this profile
2974            size_t input_index;
2975            for (input_index = 0; input_index < mInputs.size(); input_index++) {
2976                desc = mInputs.valueAt(input_index);
2977                if (desc->mProfile == profile) {
2978                    break;
2979                }
2980            }
2981            if (input_index != mInputs.size()) {
2982                continue;
2983            }
2984
2985            ALOGV("opening input for device 0x%X with params %s", device, address.string());
2986            desc = new AudioInputDescriptor(profile);
2987            desc->mDevice = device;
2988
2989            audio_io_handle_t input = mpClientInterface->openInput(profile->mModule->mHandle,
2990                                            &desc->mDevice,
2991                                            &desc->mSamplingRate,
2992                                            &desc->mFormat,
2993                                            &desc->mChannelMask,
2994                                            AUDIO_INPUT_FLAG_NONE /*FIXME*/);
2995
2996            if (input != 0) {
2997                if (!address.isEmpty()) {
2998                    mpClientInterface->setParameters(input, addressToParameter(device, address));
2999                }
3000
3001                // Here is where we step through and resolve any "dynamic" fields
3002                String8 reply;
3003                char *value;
3004                if (profile->mSamplingRates[0] == 0) {
3005                    reply = mpClientInterface->getParameters(input,
3006                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3007                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3008                              reply.string());
3009                    value = strpbrk((char *)reply.string(), "=");
3010                    if (value != NULL) {
3011                        profile->loadSamplingRates(value + 1);
3012                    }
3013                }
3014                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3015                    reply = mpClientInterface->getParameters(input,
3016                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3017                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3018                    value = strpbrk((char *)reply.string(), "=");
3019                    if (value != NULL) {
3020                        profile->loadFormats(value + 1);
3021                    }
3022                }
3023                if (profile->mChannelMasks[0] == 0) {
3024                    reply = mpClientInterface->getParameters(input,
3025                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3026                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3027                              reply.string());
3028                    value = strpbrk((char *)reply.string(), "=");
3029                    if (value != NULL) {
3030                        profile->loadInChannels(value + 1);
3031                    }
3032                }
3033                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3034                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3035                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3036                    ALOGW("checkInputsForDevice() direct input missing param");
3037                    mpClientInterface->closeInput(input);
3038                    input = 0;
3039                }
3040
3041                if (input != 0) {
3042                    addInput(input, desc);
3043                }
3044            } // endif input != 0
3045
3046            if (input == 0) {
3047                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3048                profiles.removeAt(profile_index);
3049                profile_index--;
3050            } else {
3051                inputs.add(input);
3052                ALOGV("checkInputsForDevice(): adding input %d", input);
3053            }
3054        } // end scan profiles
3055
3056        if (profiles.isEmpty()) {
3057            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3058            return BAD_VALUE;
3059        }
3060    } else {
3061        // Disconnect
3062        // check if one opened input is not needed any more after disconnecting one device
3063        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3064            desc = mInputs.valueAt(input_index);
3065            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3066                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3067                      mInputs.keyAt(input_index));
3068                inputs.add(mInputs.keyAt(input_index));
3069            }
3070        }
3071        // Clear any profiles associated with the disconnected device.
3072        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3073            if (mHwModules[module_index]->mHandle == 0) {
3074                continue;
3075            }
3076            for (size_t profile_index = 0;
3077                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3078                 profile_index++) {
3079                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3080                if (profile->mSupportedDevices.types() & device) {
3081                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3082                          profile_index, module_index);
3083                    if (profile->mSamplingRates[0] == 0) {
3084                        profile->mSamplingRates.clear();
3085                        profile->mSamplingRates.add(0);
3086                    }
3087                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3088                        profile->mFormats.clear();
3089                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3090                    }
3091                    if (profile->mChannelMasks[0] == 0) {
3092                        profile->mChannelMasks.clear();
3093                        profile->mChannelMasks.add(0);
3094                    }
3095                }
3096            }
3097        }
3098    } // end disconnect
3099
3100    return NO_ERROR;
3101}
3102
3103
3104void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3105{
3106    ALOGV("closeOutput(%d)", output);
3107
3108    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3109    if (outputDesc == NULL) {
3110        ALOGW("closeOutput() unknown output %d", output);
3111        return;
3112    }
3113
3114    // look for duplicated outputs connected to the output being removed.
3115    for (size_t i = 0; i < mOutputs.size(); i++) {
3116        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3117        if (dupOutputDesc->isDuplicated() &&
3118                (dupOutputDesc->mOutput1 == outputDesc ||
3119                dupOutputDesc->mOutput2 == outputDesc)) {
3120            sp<AudioOutputDescriptor> outputDesc2;
3121            if (dupOutputDesc->mOutput1 == outputDesc) {
3122                outputDesc2 = dupOutputDesc->mOutput2;
3123            } else {
3124                outputDesc2 = dupOutputDesc->mOutput1;
3125            }
3126            // As all active tracks on duplicated output will be deleted,
3127            // and as they were also referenced on the other output, the reference
3128            // count for their stream type must be adjusted accordingly on
3129            // the other output.
3130            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3131                int refCount = dupOutputDesc->mRefCount[j];
3132                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3133            }
3134            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3135            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3136
3137            mpClientInterface->closeOutput(duplicatedOutput);
3138            mOutputs.removeItem(duplicatedOutput);
3139        }
3140    }
3141
3142    AudioParameter param;
3143    param.add(String8("closing"), String8("true"));
3144    mpClientInterface->setParameters(output, param.toString());
3145
3146    mpClientInterface->closeOutput(output);
3147    mOutputs.removeItem(output);
3148    mPreviousOutputs = mOutputs;
3149    nextAudioPortGeneration();
3150}
3151
3152SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3153                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3154{
3155    SortedVector<audio_io_handle_t> outputs;
3156
3157    ALOGVV("getOutputsForDevice() device %04x", device);
3158    for (size_t i = 0; i < openOutputs.size(); i++) {
3159        ALOGVV("output %d isDuplicated=%d device=%04x",
3160                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3161        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3162            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3163            outputs.add(openOutputs.keyAt(i));
3164        }
3165    }
3166    return outputs;
3167}
3168
3169bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3170                                   SortedVector<audio_io_handle_t>& outputs2)
3171{
3172    if (outputs1.size() != outputs2.size()) {
3173        return false;
3174    }
3175    for (size_t i = 0; i < outputs1.size(); i++) {
3176        if (outputs1[i] != outputs2[i]) {
3177            return false;
3178        }
3179    }
3180    return true;
3181}
3182
3183void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3184{
3185    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3186    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3187    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3188    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3189
3190    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3191        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3192              strategy, srcOutputs[0], dstOutputs[0]);
3193        // mute strategy while moving tracks from one output to another
3194        for (size_t i = 0; i < srcOutputs.size(); i++) {
3195            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3196            if (desc->isStrategyActive(strategy)) {
3197                setStrategyMute(strategy, true, srcOutputs[i]);
3198                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3199            }
3200        }
3201
3202        // Move effects associated to this strategy from previous output to new output
3203        if (strategy == STRATEGY_MEDIA) {
3204            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3205            SortedVector<audio_io_handle_t> moved;
3206            for (size_t i = 0; i < mEffects.size(); i++) {
3207                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3208                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3209                        effectDesc->mIo != fxOutput) {
3210                    if (moved.indexOf(effectDesc->mIo) < 0) {
3211                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3212                              mEffects.keyAt(i), fxOutput);
3213                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3214                                                       fxOutput);
3215                        moved.add(effectDesc->mIo);
3216                    }
3217                    effectDesc->mIo = fxOutput;
3218                }
3219            }
3220        }
3221        // Move tracks associated to this strategy from previous output to new output
3222        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3223            if (getStrategy((audio_stream_type_t)i) == strategy) {
3224                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3225            }
3226        }
3227    }
3228}
3229
3230void AudioPolicyManager::checkOutputForAllStrategies()
3231{
3232    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3233    checkOutputForStrategy(STRATEGY_PHONE);
3234    checkOutputForStrategy(STRATEGY_SONIFICATION);
3235    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3236    checkOutputForStrategy(STRATEGY_MEDIA);
3237    checkOutputForStrategy(STRATEGY_DTMF);
3238}
3239
3240audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3241{
3242    for (size_t i = 0; i < mOutputs.size(); i++) {
3243        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3244        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3245            return mOutputs.keyAt(i);
3246        }
3247    }
3248
3249    return 0;
3250}
3251
3252void AudioPolicyManager::checkA2dpSuspend()
3253{
3254    audio_io_handle_t a2dpOutput = getA2dpOutput();
3255    if (a2dpOutput == 0) {
3256        mA2dpSuspended = false;
3257        return;
3258    }
3259
3260    bool isScoConnected =
3261            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3262    // suspend A2DP output if:
3263    //      (NOT already suspended) &&
3264    //      ((SCO device is connected &&
3265    //       (forced usage for communication || for record is SCO))) ||
3266    //      (phone state is ringing || in call)
3267    //
3268    // restore A2DP output if:
3269    //      (Already suspended) &&
3270    //      ((SCO device is NOT connected ||
3271    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3272    //      (phone state is NOT ringing && NOT in call)
3273    //
3274    if (mA2dpSuspended) {
3275        if ((!isScoConnected ||
3276             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3277              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3278             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3279              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3280
3281            mpClientInterface->restoreOutput(a2dpOutput);
3282            mA2dpSuspended = false;
3283        }
3284    } else {
3285        if ((isScoConnected &&
3286             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3287              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3288             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3289              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3290
3291            mpClientInterface->suspendOutput(a2dpOutput);
3292            mA2dpSuspended = true;
3293        }
3294    }
3295}
3296
3297audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3298{
3299    audio_devices_t device = AUDIO_DEVICE_NONE;
3300
3301    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3302
3303    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3304    if (index >= 0) {
3305        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3306        if (patchDesc->mUid != mUidCached) {
3307            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3308                  outputDesc->device(), outputDesc->mPatchHandle);
3309            return outputDesc->device();
3310        }
3311    }
3312
3313    // check the following by order of priority to request a routing change if necessary:
3314    // 1: the strategy enforced audible is active on the output:
3315    //      use device for strategy enforced audible
3316    // 2: we are in call or the strategy phone is active on the output:
3317    //      use device for strategy phone
3318    // 3: the strategy sonification is active on the output:
3319    //      use device for strategy sonification
3320    // 4: the strategy "respectful" sonification is active on the output:
3321    //      use device for strategy "respectful" sonification
3322    // 5: the strategy media is active on the output:
3323    //      use device for strategy media
3324    // 6: the strategy DTMF is active on the output:
3325    //      use device for strategy DTMF
3326    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3327        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3328    } else if (isInCall() ||
3329                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3330        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3331    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3332        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3333    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3334        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3335    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3336        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3337    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3338        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3339    }
3340
3341    ALOGV("getNewOutputDevice() selected device %x", device);
3342    return device;
3343}
3344
3345audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3346{
3347    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3348
3349    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3350    if (index >= 0) {
3351        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3352        if (patchDesc->mUid != mUidCached) {
3353            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3354                  inputDesc->mDevice, inputDesc->mPatchHandle);
3355            return inputDesc->mDevice;
3356        }
3357    }
3358
3359    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3360
3361    ALOGV("getNewInputDevice() selected device %x", device);
3362    return device;
3363}
3364
3365uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3366    return (uint32_t)getStrategy(stream);
3367}
3368
3369audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3370    // By checking the range of stream before calling getStrategy, we avoid
3371    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3372    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3373    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3374        return AUDIO_DEVICE_NONE;
3375    }
3376    audio_devices_t devices;
3377    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3378    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3379    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3380    for (size_t i = 0; i < outputs.size(); i++) {
3381        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3382        if (outputDesc->isStrategyActive(strategy)) {
3383            devices = outputDesc->device();
3384            break;
3385        }
3386    }
3387    return devices;
3388}
3389
3390AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3391        audio_stream_type_t stream) {
3392    // stream to strategy mapping
3393    switch (stream) {
3394    case AUDIO_STREAM_VOICE_CALL:
3395    case AUDIO_STREAM_BLUETOOTH_SCO:
3396        return STRATEGY_PHONE;
3397    case AUDIO_STREAM_RING:
3398    case AUDIO_STREAM_ALARM:
3399        return STRATEGY_SONIFICATION;
3400    case AUDIO_STREAM_NOTIFICATION:
3401        return STRATEGY_SONIFICATION_RESPECTFUL;
3402    case AUDIO_STREAM_DTMF:
3403        return STRATEGY_DTMF;
3404    default:
3405        ALOGE("unknown stream type");
3406    case AUDIO_STREAM_SYSTEM:
3407        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3408        // while key clicks are played produces a poor result
3409    case AUDIO_STREAM_TTS:
3410    case AUDIO_STREAM_MUSIC:
3411        return STRATEGY_MEDIA;
3412    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3413        return STRATEGY_ENFORCED_AUDIBLE;
3414    }
3415}
3416
3417uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3418    // flags to strategy mapping
3419    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3420        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3421    }
3422
3423    // usage to strategy mapping
3424    switch (attr->usage) {
3425    case AUDIO_USAGE_MEDIA:
3426    case AUDIO_USAGE_GAME:
3427    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3428    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3429    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3430        return (uint32_t) STRATEGY_MEDIA;
3431
3432    case AUDIO_USAGE_VOICE_COMMUNICATION:
3433        return (uint32_t) STRATEGY_PHONE;
3434
3435    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3436        return (uint32_t) STRATEGY_DTMF;
3437
3438    case AUDIO_USAGE_ALARM:
3439    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3440        return (uint32_t) STRATEGY_SONIFICATION;
3441
3442    case AUDIO_USAGE_NOTIFICATION:
3443    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3444    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3445    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3446    case AUDIO_USAGE_NOTIFICATION_EVENT:
3447        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3448
3449    case AUDIO_USAGE_UNKNOWN:
3450    default:
3451        return (uint32_t) STRATEGY_MEDIA;
3452    }
3453}
3454
3455void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3456    switch(stream) {
3457    case AUDIO_STREAM_MUSIC:
3458        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3459        updateDevicesAndOutputs();
3460        break;
3461    default:
3462        break;
3463    }
3464}
3465
3466audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3467                                                             bool fromCache)
3468{
3469    uint32_t device = AUDIO_DEVICE_NONE;
3470
3471    if (fromCache) {
3472        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3473              strategy, mDeviceForStrategy[strategy]);
3474        return mDeviceForStrategy[strategy];
3475    }
3476    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3477    switch (strategy) {
3478
3479    case STRATEGY_SONIFICATION_RESPECTFUL:
3480        if (isInCall()) {
3481            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3482        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3483                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3484            // while media is playing on a remote device, use the the sonification behavior.
3485            // Note that we test this usecase before testing if media is playing because
3486            //   the isStreamActive() method only informs about the activity of a stream, not
3487            //   if it's for local playback. Note also that we use the same delay between both tests
3488            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3489        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3490            // while media is playing (or has recently played), use the same device
3491            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3492        } else {
3493            // when media is not playing anymore, fall back on the sonification behavior
3494            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3495        }
3496
3497        break;
3498
3499    case STRATEGY_DTMF:
3500        if (!isInCall()) {
3501            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3502            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3503            break;
3504        }
3505        // when in call, DTMF and PHONE strategies follow the same rules
3506        // FALL THROUGH
3507
3508    case STRATEGY_PHONE:
3509        // for phone strategy, we first consider the forced use and then the available devices by order
3510        // of priority
3511        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3512        case AUDIO_POLICY_FORCE_BT_SCO:
3513            if (!isInCall() || strategy != STRATEGY_DTMF) {
3514                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3515                if (device) break;
3516            }
3517            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3518            if (device) break;
3519            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3520            if (device) break;
3521            // if SCO device is requested but no SCO device is available, fall back to default case
3522            // FALL THROUGH
3523
3524        default:    // FORCE_NONE
3525            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3526            if (!isInCall() &&
3527                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3528                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3529                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3530                if (device) break;
3531                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3532                if (device) break;
3533            }
3534            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3535            if (device) break;
3536            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3537            if (device) break;
3538            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3539                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3540                if (device) break;
3541                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3542                if (device) break;
3543                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3544                if (device) break;
3545                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3546                if (device) break;
3547                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3548                if (device) break;
3549            }
3550            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3551            if (device) break;
3552            device = mDefaultOutputDevice->mDeviceType;
3553            if (device == AUDIO_DEVICE_NONE) {
3554                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3555            }
3556            break;
3557
3558        case AUDIO_POLICY_FORCE_SPEAKER:
3559            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3560            // A2DP speaker when forcing to speaker output
3561            if (!isInCall() &&
3562                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3563                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3564                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3565                if (device) break;
3566            }
3567            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3568                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3569                if (device) break;
3570                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3571                if (device) break;
3572                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3573                if (device) break;
3574                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3575                if (device) break;
3576                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3577                if (device) break;
3578            }
3579            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3580            if (device) break;
3581            device = mDefaultOutputDevice->mDeviceType;
3582            if (device == AUDIO_DEVICE_NONE) {
3583                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
3584            }
3585            break;
3586        }
3587    break;
3588
3589    case STRATEGY_SONIFICATION:
3590
3591        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
3592        // handleIncallSonification().
3593        if (isInCall()) {
3594            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
3595            break;
3596        }
3597        // FALL THROUGH
3598
3599    case STRATEGY_ENFORCED_AUDIBLE:
3600        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
3601        // except:
3602        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
3603        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
3604
3605        if ((strategy == STRATEGY_SONIFICATION) ||
3606                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
3607            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3608            if (device == AUDIO_DEVICE_NONE) {
3609                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
3610            }
3611        }
3612        // The second device used for sonification is the same as the device used by media strategy
3613        // FALL THROUGH
3614
3615    case STRATEGY_MEDIA: {
3616        uint32_t device2 = AUDIO_DEVICE_NONE;
3617        if (strategy != STRATEGY_SONIFICATION) {
3618            // no sonification on remote submix (e.g. WFD)
3619            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
3620        }
3621        if ((device2 == AUDIO_DEVICE_NONE) &&
3622                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3623                (getA2dpOutput() != 0) && !mA2dpSuspended) {
3624            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3625            if (device2 == AUDIO_DEVICE_NONE) {
3626                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3627            }
3628            if (device2 == AUDIO_DEVICE_NONE) {
3629                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3630            }
3631        }
3632        if (device2 == AUDIO_DEVICE_NONE) {
3633            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3634        }
3635        if (device2 == AUDIO_DEVICE_NONE) {
3636            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3637        }
3638        if (device2 == AUDIO_DEVICE_NONE) {
3639            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3640        }
3641        if (device2 == AUDIO_DEVICE_NONE) {
3642            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3643        }
3644        if (device2 == AUDIO_DEVICE_NONE) {
3645            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3646        }
3647        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
3648            // no sonification on aux digital (e.g. HDMI)
3649            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3650        }
3651        if ((device2 == AUDIO_DEVICE_NONE) &&
3652                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
3653            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3654        }
3655        if (device2 == AUDIO_DEVICE_NONE) {
3656            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3657        }
3658        int device3 = AUDIO_DEVICE_NONE;
3659        if (strategy == STRATEGY_MEDIA) {
3660            // ARC, SPDIF and AUX_LINE can co-exist with others.
3661            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
3662            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
3663            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
3664        }
3665
3666        device2 |= device3;
3667        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
3668        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
3669        device |= device2;
3670
3671        // If hdmi system audio mode is on, remove speaker out of output list.
3672        if ((strategy == STRATEGY_MEDIA) &&
3673            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
3674                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
3675            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
3676        }
3677
3678        if (device) break;
3679        device = mDefaultOutputDevice->mDeviceType;
3680        if (device == AUDIO_DEVICE_NONE) {
3681            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
3682        }
3683        } break;
3684
3685    default:
3686        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
3687        break;
3688    }
3689
3690    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
3691    return device;
3692}
3693
3694void AudioPolicyManager::updateDevicesAndOutputs()
3695{
3696    for (int i = 0; i < NUM_STRATEGIES; i++) {
3697        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
3698    }
3699    mPreviousOutputs = mOutputs;
3700}
3701
3702uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
3703                                                       audio_devices_t prevDevice,
3704                                                       uint32_t delayMs)
3705{
3706    // mute/unmute strategies using an incompatible device combination
3707    // if muting, wait for the audio in pcm buffer to be drained before proceeding
3708    // if unmuting, unmute only after the specified delay
3709    if (outputDesc->isDuplicated()) {
3710        return 0;
3711    }
3712
3713    uint32_t muteWaitMs = 0;
3714    audio_devices_t device = outputDesc->device();
3715    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
3716
3717    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
3718        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
3719        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
3720        bool doMute = false;
3721
3722        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
3723            doMute = true;
3724            outputDesc->mStrategyMutedByDevice[i] = true;
3725        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
3726            doMute = true;
3727            outputDesc->mStrategyMutedByDevice[i] = false;
3728        }
3729        if (doMute) {
3730            for (size_t j = 0; j < mOutputs.size(); j++) {
3731                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
3732                // skip output if it does not share any device with current output
3733                if ((desc->supportedDevices() & outputDesc->supportedDevices())
3734                        == AUDIO_DEVICE_NONE) {
3735                    continue;
3736                }
3737                audio_io_handle_t curOutput = mOutputs.keyAt(j);
3738                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
3739                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
3740                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
3741                if (desc->isStrategyActive((routing_strategy)i)) {
3742                    if (mute) {
3743                        // FIXME: should not need to double latency if volume could be applied
3744                        // immediately by the audioflinger mixer. We must account for the delay
3745                        // between now and the next time the audioflinger thread for this output
3746                        // will process a buffer (which corresponds to one buffer size,
3747                        // usually 1/2 or 1/4 of the latency).
3748                        if (muteWaitMs < desc->latency() * 2) {
3749                            muteWaitMs = desc->latency() * 2;
3750                        }
3751                    }
3752                }
3753            }
3754        }
3755    }
3756
3757    // temporary mute output if device selection changes to avoid volume bursts due to
3758    // different per device volumes
3759    if (outputDesc->isActive() && (device != prevDevice)) {
3760        if (muteWaitMs < outputDesc->latency() * 2) {
3761            muteWaitMs = outputDesc->latency() * 2;
3762        }
3763        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
3764            if (outputDesc->isStrategyActive((routing_strategy)i)) {
3765                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
3766                // do tempMute unmute after twice the mute wait time
3767                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
3768                                muteWaitMs *2, device);
3769            }
3770        }
3771    }
3772
3773    // wait for the PCM output buffers to empty before proceeding with the rest of the command
3774    if (muteWaitMs > delayMs) {
3775        muteWaitMs -= delayMs;
3776        usleep(muteWaitMs * 1000);
3777        return muteWaitMs;
3778    }
3779    return 0;
3780}
3781
3782uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
3783                                             audio_devices_t device,
3784                                             bool force,
3785                                             int delayMs,
3786                                             audio_patch_handle_t *patchHandle,
3787                                             const char* address)
3788{
3789    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
3790    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3791    AudioParameter param;
3792    uint32_t muteWaitMs;
3793
3794    if (outputDesc->isDuplicated()) {
3795        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
3796        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
3797        return muteWaitMs;
3798    }
3799    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
3800    // output profile
3801    if ((device != AUDIO_DEVICE_NONE) &&
3802            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
3803        return 0;
3804    }
3805
3806    // filter devices according to output selected
3807    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
3808
3809    audio_devices_t prevDevice = outputDesc->mDevice;
3810
3811    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
3812
3813    if (device != AUDIO_DEVICE_NONE) {
3814        outputDesc->mDevice = device;
3815    }
3816    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
3817
3818    // Do not change the routing if:
3819    //  - the requested device is AUDIO_DEVICE_NONE
3820    //  - the requested device is the same as current device and force is not specified.
3821    // Doing this check here allows the caller to call setOutputDevice() without conditions
3822    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
3823        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
3824        return muteWaitMs;
3825    }
3826
3827    ALOGV("setOutputDevice() changing device");
3828
3829    // do the routing
3830    if (device == AUDIO_DEVICE_NONE) {
3831        resetOutputDevice(output, delayMs, NULL);
3832    } else {
3833        DeviceVector deviceList = (address == NULL) ?
3834                mAvailableOutputDevices.getDevicesFromType(device)
3835                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
3836        if (!deviceList.isEmpty()) {
3837            struct audio_patch patch;
3838            outputDesc->toAudioPortConfig(&patch.sources[0]);
3839            patch.num_sources = 1;
3840            patch.num_sinks = 0;
3841            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
3842                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
3843                patch.num_sinks++;
3844            }
3845            ssize_t index;
3846            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
3847                index = mAudioPatches.indexOfKey(*patchHandle);
3848            } else {
3849                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3850            }
3851            sp< AudioPatch> patchDesc;
3852            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
3853            if (index >= 0) {
3854                patchDesc = mAudioPatches.valueAt(index);
3855                afPatchHandle = patchDesc->mAfPatchHandle;
3856            }
3857
3858            status_t status = mpClientInterface->createAudioPatch(&patch,
3859                                                                   &afPatchHandle,
3860                                                                   delayMs);
3861            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
3862                    "num_sources %d num_sinks %d",
3863                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
3864            if (status == NO_ERROR) {
3865                if (index < 0) {
3866                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
3867                                               &patch, mUidCached);
3868                    addAudioPatch(patchDesc->mHandle, patchDesc);
3869                } else {
3870                    patchDesc->mPatch = patch;
3871                }
3872                patchDesc->mAfPatchHandle = afPatchHandle;
3873                patchDesc->mUid = mUidCached;
3874                if (patchHandle) {
3875                    *patchHandle = patchDesc->mHandle;
3876                }
3877                outputDesc->mPatchHandle = patchDesc->mHandle;
3878                nextAudioPortGeneration();
3879                mpClientInterface->onAudioPatchListUpdate();
3880            }
3881        }
3882    }
3883
3884    // update stream volumes according to new device
3885    applyStreamVolumes(output, device, delayMs);
3886
3887    return muteWaitMs;
3888}
3889
3890status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
3891                                               int delayMs,
3892                                               audio_patch_handle_t *patchHandle)
3893{
3894    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3895    ssize_t index;
3896    if (patchHandle) {
3897        index = mAudioPatches.indexOfKey(*patchHandle);
3898    } else {
3899        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3900    }
3901    if (index < 0) {
3902        return INVALID_OPERATION;
3903    }
3904    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3905    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
3906    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
3907    outputDesc->mPatchHandle = 0;
3908    removeAudioPatch(patchDesc->mHandle);
3909    nextAudioPortGeneration();
3910    mpClientInterface->onAudioPatchListUpdate();
3911    return status;
3912}
3913
3914status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
3915                                            audio_devices_t device,
3916                                            bool force,
3917                                            audio_patch_handle_t *patchHandle)
3918{
3919    status_t status = NO_ERROR;
3920
3921    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3922    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
3923        inputDesc->mDevice = device;
3924
3925        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
3926        if (!deviceList.isEmpty()) {
3927            struct audio_patch patch;
3928            inputDesc->toAudioPortConfig(&patch.sinks[0]);
3929            // AUDIO_SOURCE_HOTWORD is for internal use only:
3930            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
3931            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD) {
3932                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
3933            }
3934            patch.num_sinks = 1;
3935            //only one input device for now
3936            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
3937            patch.num_sources = 1;
3938            ssize_t index;
3939            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
3940                index = mAudioPatches.indexOfKey(*patchHandle);
3941            } else {
3942                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3943            }
3944            sp< AudioPatch> patchDesc;
3945            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
3946            if (index >= 0) {
3947                patchDesc = mAudioPatches.valueAt(index);
3948                afPatchHandle = patchDesc->mAfPatchHandle;
3949            }
3950
3951            status_t status = mpClientInterface->createAudioPatch(&patch,
3952                                                                  &afPatchHandle,
3953                                                                  0);
3954            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
3955                                                                          status, afPatchHandle);
3956            if (status == NO_ERROR) {
3957                if (index < 0) {
3958                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
3959                                               &patch, mUidCached);
3960                    addAudioPatch(patchDesc->mHandle, patchDesc);
3961                } else {
3962                    patchDesc->mPatch = patch;
3963                }
3964                patchDesc->mAfPatchHandle = afPatchHandle;
3965                patchDesc->mUid = mUidCached;
3966                if (patchHandle) {
3967                    *patchHandle = patchDesc->mHandle;
3968                }
3969                inputDesc->mPatchHandle = patchDesc->mHandle;
3970                nextAudioPortGeneration();
3971                mpClientInterface->onAudioPatchListUpdate();
3972            }
3973        }
3974    }
3975    return status;
3976}
3977
3978status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
3979                                              audio_patch_handle_t *patchHandle)
3980{
3981    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3982    ssize_t index;
3983    if (patchHandle) {
3984        index = mAudioPatches.indexOfKey(*patchHandle);
3985    } else {
3986        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3987    }
3988    if (index < 0) {
3989        return INVALID_OPERATION;
3990    }
3991    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3992    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3993    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
3994    inputDesc->mPatchHandle = 0;
3995    removeAudioPatch(patchDesc->mHandle);
3996    nextAudioPortGeneration();
3997    mpClientInterface->onAudioPatchListUpdate();
3998    return status;
3999}
4000
4001sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4002                                                   uint32_t& samplingRate,
4003                                                   audio_format_t format,
4004                                                   audio_channel_mask_t channelMask,
4005                                                   audio_input_flags_t flags)
4006{
4007    // Choose an input profile based on the requested capture parameters: select the first available
4008    // profile supporting all requested parameters.
4009
4010    for (size_t i = 0; i < mHwModules.size(); i++)
4011    {
4012        if (mHwModules[i]->mHandle == 0) {
4013            continue;
4014        }
4015        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4016        {
4017            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4018            // profile->log();
4019            if (profile->isCompatibleProfile(device, samplingRate,
4020                                             &samplingRate /*updatedSamplingRate*/,
4021                                             format, channelMask, (audio_output_flags_t) flags)) {
4022                return profile;
4023            }
4024        }
4025    }
4026    return NULL;
4027}
4028
4029audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4030{
4031    uint32_t device = AUDIO_DEVICE_NONE;
4032    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4033                                            ~AUDIO_DEVICE_BIT_IN;
4034    switch (inputSource) {
4035    case AUDIO_SOURCE_VOICE_UPLINK:
4036      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4037          device = AUDIO_DEVICE_IN_VOICE_CALL;
4038          break;
4039      }
4040      // FALL THROUGH
4041
4042    case AUDIO_SOURCE_DEFAULT:
4043    case AUDIO_SOURCE_MIC:
4044    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4045        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4046        break;
4047    }
4048    // FALL THROUGH
4049
4050    case AUDIO_SOURCE_VOICE_RECOGNITION:
4051    case AUDIO_SOURCE_HOTWORD:
4052    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4053        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4054                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4055            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4056        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4057            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4058        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4059            device = AUDIO_DEVICE_IN_USB_DEVICE;
4060        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4061            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4062        }
4063        break;
4064    case AUDIO_SOURCE_CAMCORDER:
4065        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4066            device = AUDIO_DEVICE_IN_BACK_MIC;
4067        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4068            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4069        }
4070        break;
4071    case AUDIO_SOURCE_VOICE_DOWNLINK:
4072    case AUDIO_SOURCE_VOICE_CALL:
4073        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4074            device = AUDIO_DEVICE_IN_VOICE_CALL;
4075        }
4076        break;
4077    case AUDIO_SOURCE_REMOTE_SUBMIX:
4078        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4079            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4080        }
4081        break;
4082    default:
4083        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4084        break;
4085    }
4086    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4087    return device;
4088}
4089
4090bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4091{
4092    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4093        device &= ~AUDIO_DEVICE_BIT_IN;
4094        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4095            return true;
4096    }
4097    return false;
4098}
4099
4100bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4101    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4102}
4103
4104audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4105{
4106    for (size_t i = 0; i < mInputs.size(); i++) {
4107        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4108        if ((input_descriptor->mRefCount > 0)
4109                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4110            return mInputs.keyAt(i);
4111        }
4112    }
4113    return 0;
4114}
4115
4116
4117audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4118{
4119    if (device == AUDIO_DEVICE_NONE) {
4120        // this happens when forcing a route update and no track is active on an output.
4121        // In this case the returned category is not important.
4122        device =  AUDIO_DEVICE_OUT_SPEAKER;
4123    } else if (popcount(device) > 1) {
4124        // Multiple device selection is either:
4125        //  - speaker + one other device: give priority to speaker in this case.
4126        //  - one A2DP device + another device: happens with duplicated output. In this case
4127        // retain the device on the A2DP output as the other must not correspond to an active
4128        // selection if not the speaker.
4129        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4130            device = AUDIO_DEVICE_OUT_SPEAKER;
4131        } else {
4132            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4133        }
4134    }
4135
4136    ALOGW_IF(popcount(device) != 1,
4137            "getDeviceForVolume() invalid device combination: %08x",
4138            device);
4139
4140    return device;
4141}
4142
4143AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4144{
4145    switch(getDeviceForVolume(device)) {
4146        case AUDIO_DEVICE_OUT_EARPIECE:
4147            return DEVICE_CATEGORY_EARPIECE;
4148        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4149        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4150        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4151        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4152        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4153        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4154            return DEVICE_CATEGORY_HEADSET;
4155        case AUDIO_DEVICE_OUT_SPEAKER:
4156        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4157        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4158        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4159        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4160        case AUDIO_DEVICE_OUT_USB_DEVICE:
4161        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4162        default:
4163            return DEVICE_CATEGORY_SPEAKER;
4164    }
4165}
4166
4167float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4168        int indexInUi)
4169{
4170    device_category deviceCategory = getDeviceCategory(device);
4171    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4172
4173    // the volume index in the UI is relative to the min and max volume indices for this stream type
4174    int nbSteps = 1 + curve[VOLMAX].mIndex -
4175            curve[VOLMIN].mIndex;
4176    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4177            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4178
4179    // find what part of the curve this index volume belongs to, or if it's out of bounds
4180    int segment = 0;
4181    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4182        return 0.0f;
4183    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4184        segment = 0;
4185    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4186        segment = 1;
4187    } else if (volIdx <= curve[VOLMAX].mIndex) {
4188        segment = 2;
4189    } else {                                                               // out of bounds
4190        return 1.0f;
4191    }
4192
4193    // linear interpolation in the attenuation table in dB
4194    float decibels = curve[segment].mDBAttenuation +
4195            ((float)(volIdx - curve[segment].mIndex)) *
4196                ( (curve[segment+1].mDBAttenuation -
4197                        curve[segment].mDBAttenuation) /
4198                    ((float)(curve[segment+1].mIndex -
4199                            curve[segment].mIndex)) );
4200
4201    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4202
4203    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4204            curve[segment].mIndex, volIdx,
4205            curve[segment+1].mIndex,
4206            curve[segment].mDBAttenuation,
4207            decibels,
4208            curve[segment+1].mDBAttenuation,
4209            amplification);
4210
4211    return amplification;
4212}
4213
4214const AudioPolicyManager::VolumeCurvePoint
4215    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4216    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4217};
4218
4219const AudioPolicyManager::VolumeCurvePoint
4220    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4221    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4222};
4223
4224const AudioPolicyManager::VolumeCurvePoint
4225    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4226    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4227};
4228
4229const AudioPolicyManager::VolumeCurvePoint
4230    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4231    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4232};
4233
4234const AudioPolicyManager::VolumeCurvePoint
4235    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4236    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4237};
4238
4239const AudioPolicyManager::VolumeCurvePoint
4240    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4241    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4242};
4243
4244// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4245// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4246// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4247// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4248
4249const AudioPolicyManager::VolumeCurvePoint
4250    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4251    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4252};
4253
4254const AudioPolicyManager::VolumeCurvePoint
4255    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4256    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4257};
4258
4259const AudioPolicyManager::VolumeCurvePoint
4260    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4261    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4262};
4263
4264const AudioPolicyManager::VolumeCurvePoint
4265    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4266    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4267};
4268
4269const AudioPolicyManager::VolumeCurvePoint
4270    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4271    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4272};
4273
4274const AudioPolicyManager::VolumeCurvePoint
4275            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4276                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4277    { // AUDIO_STREAM_VOICE_CALL
4278        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4279        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4280        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4281    },
4282    { // AUDIO_STREAM_SYSTEM
4283        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4284        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4285        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4286    },
4287    { // AUDIO_STREAM_RING
4288        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4289        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4290        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4291    },
4292    { // AUDIO_STREAM_MUSIC
4293        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4294        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4295        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4296    },
4297    { // AUDIO_STREAM_ALARM
4298        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4299        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4300        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4301    },
4302    { // AUDIO_STREAM_NOTIFICATION
4303        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4304        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4305        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4306    },
4307    { // AUDIO_STREAM_BLUETOOTH_SCO
4308        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4309        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4310        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4311    },
4312    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4313        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4314        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4315        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4316    },
4317    {  // AUDIO_STREAM_DTMF
4318        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4319        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4320        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4321    },
4322    { // AUDIO_STREAM_TTS
4323        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4324        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4325        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4326    },
4327};
4328
4329void AudioPolicyManager::initializeVolumeCurves()
4330{
4331    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4332        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4333            mStreams[i].mVolumeCurve[j] =
4334                    sVolumeProfiles[i][j];
4335        }
4336    }
4337
4338    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4339    if (mSpeakerDrcEnabled) {
4340        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4341                sDefaultSystemVolumeCurveDrc;
4342        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4343                sSpeakerSonificationVolumeCurveDrc;
4344        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4345                sSpeakerSonificationVolumeCurveDrc;
4346        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4347                sSpeakerSonificationVolumeCurveDrc;
4348        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4349                sSpeakerMediaVolumeCurveDrc;
4350    }
4351}
4352
4353float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4354                                            int index,
4355                                            audio_io_handle_t output,
4356                                            audio_devices_t device)
4357{
4358    float volume = 1.0;
4359    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4360    StreamDescriptor &streamDesc = mStreams[stream];
4361
4362    if (device == AUDIO_DEVICE_NONE) {
4363        device = outputDesc->device();
4364    }
4365
4366    volume = volIndexToAmpl(device, streamDesc, index);
4367
4368    // if a headset is connected, apply the following rules to ring tones and notifications
4369    // to avoid sound level bursts in user's ears:
4370    // - always attenuate ring tones and notifications volume by 6dB
4371    // - if music is playing, always limit the volume to current music volume,
4372    // with a minimum threshold at -36dB so that notification is always perceived.
4373    const routing_strategy stream_strategy = getStrategy(stream);
4374    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4375            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4376            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4377            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4378        ((stream_strategy == STRATEGY_SONIFICATION)
4379                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4380                || (stream == AUDIO_STREAM_SYSTEM)
4381                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4382                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4383        streamDesc.mCanBeMuted) {
4384        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4385        // when the phone is ringing we must consider that music could have been paused just before
4386        // by the music application and behave as if music was active if the last music track was
4387        // just stopped
4388        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4389                mLimitRingtoneVolume) {
4390            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4391            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4392                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4393                               output,
4394                               musicDevice);
4395            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4396                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4397            if (volume > minVol) {
4398                volume = minVol;
4399                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4400            }
4401        }
4402    }
4403
4404    return volume;
4405}
4406
4407status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4408                                                   int index,
4409                                                   audio_io_handle_t output,
4410                                                   audio_devices_t device,
4411                                                   int delayMs,
4412                                                   bool force)
4413{
4414
4415    // do not change actual stream volume if the stream is muted
4416    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4417        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4418              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4419        return NO_ERROR;
4420    }
4421
4422    // do not change in call volume if bluetooth is connected and vice versa
4423    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4424            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4425        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4426                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4427        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4428             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4429        return INVALID_OPERATION;
4430    }
4431
4432    float volume = computeVolume(stream, index, output, device);
4433    // We actually change the volume if:
4434    // - the float value returned by computeVolume() changed
4435    // - the force flag is set
4436    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4437            force) {
4438        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4439        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4440        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4441        // enabled
4442        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4443            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4444        }
4445        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4446    }
4447
4448    if (stream == AUDIO_STREAM_VOICE_CALL ||
4449        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4450        float voiceVolume;
4451        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4452        if (stream == AUDIO_STREAM_VOICE_CALL) {
4453            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4454        } else {
4455            voiceVolume = 1.0;
4456        }
4457
4458        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4459            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4460            mLastVoiceVolume = voiceVolume;
4461        }
4462    }
4463
4464    return NO_ERROR;
4465}
4466
4467void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4468                                                audio_devices_t device,
4469                                                int delayMs,
4470                                                bool force)
4471{
4472    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4473
4474    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4475        checkAndSetVolume((audio_stream_type_t)stream,
4476                          mStreams[stream].getVolumeIndex(device),
4477                          output,
4478                          device,
4479                          delayMs,
4480                          force);
4481    }
4482}
4483
4484void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4485                                             bool on,
4486                                             audio_io_handle_t output,
4487                                             int delayMs,
4488                                             audio_devices_t device)
4489{
4490    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
4491    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4492        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4493            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
4494        }
4495    }
4496}
4497
4498void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4499                                           bool on,
4500                                           audio_io_handle_t output,
4501                                           int delayMs,
4502                                           audio_devices_t device)
4503{
4504    StreamDescriptor &streamDesc = mStreams[stream];
4505    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4506    if (device == AUDIO_DEVICE_NONE) {
4507        device = outputDesc->device();
4508    }
4509
4510    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
4511          stream, on, output, outputDesc->mMuteCount[stream], device);
4512
4513    if (on) {
4514        if (outputDesc->mMuteCount[stream] == 0) {
4515            if (streamDesc.mCanBeMuted &&
4516                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4517                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
4518                checkAndSetVolume(stream, 0, output, device, delayMs);
4519            }
4520        }
4521        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
4522        outputDesc->mMuteCount[stream]++;
4523    } else {
4524        if (outputDesc->mMuteCount[stream] == 0) {
4525            ALOGV("setStreamMute() unmuting non muted stream!");
4526            return;
4527        }
4528        if (--outputDesc->mMuteCount[stream] == 0) {
4529            checkAndSetVolume(stream,
4530                              streamDesc.getVolumeIndex(device),
4531                              output,
4532                              device,
4533                              delayMs);
4534        }
4535    }
4536}
4537
4538void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
4539                                                      bool starting, bool stateChange)
4540{
4541    // if the stream pertains to sonification strategy and we are in call we must
4542    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
4543    // in the device used for phone strategy and play the tone if the selected device does not
4544    // interfere with the device used for phone strategy
4545    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
4546    // many times as there are active tracks on the output
4547    const routing_strategy stream_strategy = getStrategy(stream);
4548    if ((stream_strategy == STRATEGY_SONIFICATION) ||
4549            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
4550        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
4551        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
4552                stream, starting, outputDesc->mDevice, stateChange);
4553        if (outputDesc->mRefCount[stream]) {
4554            int muteCount = 1;
4555            if (stateChange) {
4556                muteCount = outputDesc->mRefCount[stream];
4557            }
4558            if (audio_is_low_visibility(stream)) {
4559                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
4560                for (int i = 0; i < muteCount; i++) {
4561                    setStreamMute(stream, starting, mPrimaryOutput);
4562                }
4563            } else {
4564                ALOGV("handleIncallSonification() high visibility");
4565                if (outputDesc->device() &
4566                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
4567                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
4568                    for (int i = 0; i < muteCount; i++) {
4569                        setStreamMute(stream, starting, mPrimaryOutput);
4570                    }
4571                }
4572                if (starting) {
4573                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
4574                                                 AUDIO_STREAM_VOICE_CALL);
4575                } else {
4576                    mpClientInterface->stopTone();
4577                }
4578            }
4579        }
4580    }
4581}
4582
4583bool AudioPolicyManager::isInCall()
4584{
4585    return isStateInCall(mPhoneState);
4586}
4587
4588bool AudioPolicyManager::isStateInCall(int state) {
4589    return ((state == AUDIO_MODE_IN_CALL) ||
4590            (state == AUDIO_MODE_IN_COMMUNICATION));
4591}
4592
4593uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
4594{
4595    return MAX_EFFECTS_CPU_LOAD;
4596}
4597
4598uint32_t AudioPolicyManager::getMaxEffectsMemory()
4599{
4600    return MAX_EFFECTS_MEMORY;
4601}
4602
4603
4604// --- AudioOutputDescriptor class implementation
4605
4606AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
4607        const sp<IOProfile>& profile)
4608    : mId(0), mIoHandle(0), mLatency(0),
4609    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
4610    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
4611{
4612    // clear usage count for all stream types
4613    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4614        mRefCount[i] = 0;
4615        mCurVolume[i] = -1.0;
4616        mMuteCount[i] = 0;
4617        mStopTime[i] = 0;
4618    }
4619    for (int i = 0; i < NUM_STRATEGIES; i++) {
4620        mStrategyMutedByDevice[i] = false;
4621    }
4622    if (profile != NULL) {
4623        mAudioPort = profile;
4624        mFlags = profile->mFlags;
4625        mSamplingRate = profile->pickSamplingRate();
4626        mFormat = profile->pickFormat();
4627        mChannelMask = profile->pickChannelMask();
4628        if (profile->mGains.size() > 0) {
4629            profile->mGains[0]->getDefaultConfig(&mGain);
4630        }
4631    }
4632}
4633
4634audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
4635{
4636    if (isDuplicated()) {
4637        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
4638    } else {
4639        return mDevice;
4640    }
4641}
4642
4643uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
4644{
4645    if (isDuplicated()) {
4646        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
4647    } else {
4648        return mLatency;
4649    }
4650}
4651
4652bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
4653        const sp<AudioOutputDescriptor> outputDesc)
4654{
4655    if (isDuplicated()) {
4656        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
4657    } else if (outputDesc->isDuplicated()){
4658        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
4659    } else {
4660        return (mProfile->mModule == outputDesc->mProfile->mModule);
4661    }
4662}
4663
4664void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
4665                                                                   int delta)
4666{
4667    // forward usage count change to attached outputs
4668    if (isDuplicated()) {
4669        mOutput1->changeRefCount(stream, delta);
4670        mOutput2->changeRefCount(stream, delta);
4671    }
4672    if ((delta + (int)mRefCount[stream]) < 0) {
4673        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
4674              delta, stream, mRefCount[stream]);
4675        mRefCount[stream] = 0;
4676        return;
4677    }
4678    mRefCount[stream] += delta;
4679    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
4680}
4681
4682audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
4683{
4684    if (isDuplicated()) {
4685        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
4686    } else {
4687        return mProfile->mSupportedDevices.types() ;
4688    }
4689}
4690
4691bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
4692{
4693    return isStrategyActive(NUM_STRATEGIES, inPastMs);
4694}
4695
4696bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
4697                                                                       uint32_t inPastMs,
4698                                                                       nsecs_t sysTime) const
4699{
4700    if ((sysTime == 0) && (inPastMs != 0)) {
4701        sysTime = systemTime();
4702    }
4703    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
4704        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
4705                (NUM_STRATEGIES == strategy)) &&
4706                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
4707            return true;
4708        }
4709    }
4710    return false;
4711}
4712
4713bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
4714                                                                       uint32_t inPastMs,
4715                                                                       nsecs_t sysTime) const
4716{
4717    if (mRefCount[stream] != 0) {
4718        return true;
4719    }
4720    if (inPastMs == 0) {
4721        return false;
4722    }
4723    if (sysTime == 0) {
4724        sysTime = systemTime();
4725    }
4726    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
4727        return true;
4728    }
4729    return false;
4730}
4731
4732void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
4733                                                 struct audio_port_config *dstConfig,
4734                                                 const struct audio_port_config *srcConfig) const
4735{
4736    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
4737
4738    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
4739                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
4740    if (srcConfig != NULL) {
4741        dstConfig->config_mask |= srcConfig->config_mask;
4742    }
4743    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
4744
4745    dstConfig->id = mId;
4746    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
4747    dstConfig->type = AUDIO_PORT_TYPE_MIX;
4748    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
4749    dstConfig->ext.mix.handle = mIoHandle;
4750    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
4751}
4752
4753void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
4754                                                    struct audio_port *port) const
4755{
4756    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
4757    mProfile->toAudioPort(port);
4758    port->id = mId;
4759    toAudioPortConfig(&port->active_config);
4760    port->ext.mix.hw_module = mProfile->mModule->mHandle;
4761    port->ext.mix.handle = mIoHandle;
4762    port->ext.mix.latency_class =
4763            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
4764}
4765
4766status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
4767{
4768    const size_t SIZE = 256;
4769    char buffer[SIZE];
4770    String8 result;
4771
4772    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
4773    result.append(buffer);
4774    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
4775    result.append(buffer);
4776    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
4777    result.append(buffer);
4778    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
4779    result.append(buffer);
4780    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
4781    result.append(buffer);
4782    snprintf(buffer, SIZE, " Devices %08x\n", device());
4783    result.append(buffer);
4784    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
4785    result.append(buffer);
4786    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
4787        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
4788                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
4789        result.append(buffer);
4790    }
4791    write(fd, result.string(), result.size());
4792
4793    return NO_ERROR;
4794}
4795
4796// --- AudioInputDescriptor class implementation
4797
4798AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
4799    : mId(0), mIoHandle(0),
4800      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
4801      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile)
4802{
4803    if (profile != NULL) {
4804        mAudioPort = profile;
4805        mSamplingRate = profile->pickSamplingRate();
4806        mFormat = profile->pickFormat();
4807        mChannelMask = profile->pickChannelMask();
4808        if (profile->mGains.size() > 0) {
4809            profile->mGains[0]->getDefaultConfig(&mGain);
4810        }
4811    }
4812}
4813
4814void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
4815                                                   struct audio_port_config *dstConfig,
4816                                                   const struct audio_port_config *srcConfig) const
4817{
4818    ALOG_ASSERT(mProfile != 0,
4819                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
4820    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
4821                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
4822    if (srcConfig != NULL) {
4823        dstConfig->config_mask |= srcConfig->config_mask;
4824    }
4825
4826    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
4827
4828    dstConfig->id = mId;
4829    dstConfig->role = AUDIO_PORT_ROLE_SINK;
4830    dstConfig->type = AUDIO_PORT_TYPE_MIX;
4831    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
4832    dstConfig->ext.mix.handle = mIoHandle;
4833    dstConfig->ext.mix.usecase.source = mInputSource;
4834}
4835
4836void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
4837                                                    struct audio_port *port) const
4838{
4839    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
4840
4841    mProfile->toAudioPort(port);
4842    port->id = mId;
4843    toAudioPortConfig(&port->active_config);
4844    port->ext.mix.hw_module = mProfile->mModule->mHandle;
4845    port->ext.mix.handle = mIoHandle;
4846    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
4847}
4848
4849status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
4850{
4851    const size_t SIZE = 256;
4852    char buffer[SIZE];
4853    String8 result;
4854
4855    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
4856    result.append(buffer);
4857    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
4858    result.append(buffer);
4859    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
4860    result.append(buffer);
4861    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
4862    result.append(buffer);
4863    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
4864    result.append(buffer);
4865    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
4866    result.append(buffer);
4867
4868    write(fd, result.string(), result.size());
4869
4870    return NO_ERROR;
4871}
4872
4873// --- StreamDescriptor class implementation
4874
4875AudioPolicyManager::StreamDescriptor::StreamDescriptor()
4876    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
4877{
4878    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
4879}
4880
4881int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
4882{
4883    device = AudioPolicyManager::getDeviceForVolume(device);
4884    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
4885    if (mIndexCur.indexOfKey(device) < 0) {
4886        device = AUDIO_DEVICE_OUT_DEFAULT;
4887    }
4888    return mIndexCur.valueFor(device);
4889}
4890
4891void AudioPolicyManager::StreamDescriptor::dump(int fd)
4892{
4893    const size_t SIZE = 256;
4894    char buffer[SIZE];
4895    String8 result;
4896
4897    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
4898             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
4899    result.append(buffer);
4900    for (size_t i = 0; i < mIndexCur.size(); i++) {
4901        snprintf(buffer, SIZE, "%04x : %02d, ",
4902                 mIndexCur.keyAt(i),
4903                 mIndexCur.valueAt(i));
4904        result.append(buffer);
4905    }
4906    result.append("\n");
4907
4908    write(fd, result.string(), result.size());
4909}
4910
4911// --- EffectDescriptor class implementation
4912
4913status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
4914{
4915    const size_t SIZE = 256;
4916    char buffer[SIZE];
4917    String8 result;
4918
4919    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
4920    result.append(buffer);
4921    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
4922    result.append(buffer);
4923    snprintf(buffer, SIZE, " Session: %d\n", mSession);
4924    result.append(buffer);
4925    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
4926    result.append(buffer);
4927    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
4928    result.append(buffer);
4929    write(fd, result.string(), result.size());
4930
4931    return NO_ERROR;
4932}
4933
4934// --- HwModule class implementation
4935
4936AudioPolicyManager::HwModule::HwModule(const char *name)
4937    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
4938      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
4939{
4940}
4941
4942AudioPolicyManager::HwModule::~HwModule()
4943{
4944    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
4945        mOutputProfiles[i]->mSupportedDevices.clear();
4946    }
4947    for (size_t i = 0; i < mInputProfiles.size(); i++) {
4948        mInputProfiles[i]->mSupportedDevices.clear();
4949    }
4950    free((void *)mName);
4951}
4952
4953status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
4954{
4955    cnode *node = root->first_child;
4956
4957    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
4958
4959    while (node) {
4960        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
4961            profile->loadSamplingRates((char *)node->value);
4962        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
4963            profile->loadFormats((char *)node->value);
4964        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
4965            profile->loadInChannels((char *)node->value);
4966        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
4967            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
4968                                                           mDeclaredDevices);
4969        } else if (strcmp(node->name, GAINS_TAG) == 0) {
4970            profile->loadGains(node);
4971        }
4972        node = node->next;
4973    }
4974    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
4975            "loadInput() invalid supported devices");
4976    ALOGW_IF(profile->mChannelMasks.size() == 0,
4977            "loadInput() invalid supported channel masks");
4978    ALOGW_IF(profile->mSamplingRates.size() == 0,
4979            "loadInput() invalid supported sampling rates");
4980    ALOGW_IF(profile->mFormats.size() == 0,
4981            "loadInput() invalid supported formats");
4982    if (!profile->mSupportedDevices.isEmpty() &&
4983            (profile->mChannelMasks.size() != 0) &&
4984            (profile->mSamplingRates.size() != 0) &&
4985            (profile->mFormats.size() != 0)) {
4986
4987        ALOGV("loadInput() adding input Supported Devices %04x",
4988              profile->mSupportedDevices.types());
4989
4990        mInputProfiles.add(profile);
4991        return NO_ERROR;
4992    } else {
4993        return BAD_VALUE;
4994    }
4995}
4996
4997status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
4998{
4999    cnode *node = root->first_child;
5000
5001    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5002
5003    while (node) {
5004        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5005            profile->loadSamplingRates((char *)node->value);
5006        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5007            profile->loadFormats((char *)node->value);
5008        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5009            profile->loadOutChannels((char *)node->value);
5010        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5011            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5012                                                           mDeclaredDevices);
5013        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5014            profile->mFlags = parseFlagNames((char *)node->value);
5015        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5016            profile->loadGains(node);
5017        }
5018        node = node->next;
5019    }
5020    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5021            "loadOutput() invalid supported devices");
5022    ALOGW_IF(profile->mChannelMasks.size() == 0,
5023            "loadOutput() invalid supported channel masks");
5024    ALOGW_IF(profile->mSamplingRates.size() == 0,
5025            "loadOutput() invalid supported sampling rates");
5026    ALOGW_IF(profile->mFormats.size() == 0,
5027            "loadOutput() invalid supported formats");
5028    if (!profile->mSupportedDevices.isEmpty() &&
5029            (profile->mChannelMasks.size() != 0) &&
5030            (profile->mSamplingRates.size() != 0) &&
5031            (profile->mFormats.size() != 0)) {
5032
5033        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5034              profile->mSupportedDevices.types(), profile->mFlags);
5035
5036        mOutputProfiles.add(profile);
5037        return NO_ERROR;
5038    } else {
5039        return BAD_VALUE;
5040    }
5041}
5042
5043status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5044{
5045    cnode *node = root->first_child;
5046
5047    audio_devices_t type = AUDIO_DEVICE_NONE;
5048    while (node) {
5049        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5050            type = parseDeviceNames((char *)node->value);
5051            break;
5052        }
5053        node = node->next;
5054    }
5055    if (type == AUDIO_DEVICE_NONE ||
5056            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5057        ALOGW("loadDevice() bad type %08x", type);
5058        return BAD_VALUE;
5059    }
5060    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5061    deviceDesc->mModule = this;
5062
5063    node = root->first_child;
5064    while (node) {
5065        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5066            deviceDesc->mAddress = String8((char *)node->value);
5067        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5068            if (audio_is_input_device(type)) {
5069                deviceDesc->loadInChannels((char *)node->value);
5070            } else {
5071                deviceDesc->loadOutChannels((char *)node->value);
5072            }
5073        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5074            deviceDesc->loadGains(node);
5075        }
5076        node = node->next;
5077    }
5078
5079    ALOGV("loadDevice() adding device name %s type %08x address %s",
5080          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5081
5082    mDeclaredDevices.add(deviceDesc);
5083
5084    return NO_ERROR;
5085}
5086
5087void AudioPolicyManager::HwModule::dump(int fd)
5088{
5089    const size_t SIZE = 256;
5090    char buffer[SIZE];
5091    String8 result;
5092
5093    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5094    result.append(buffer);
5095    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5096    result.append(buffer);
5097    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5098    result.append(buffer);
5099    write(fd, result.string(), result.size());
5100    if (mOutputProfiles.size()) {
5101        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5102        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5103            snprintf(buffer, SIZE, "    output %zu:\n", i);
5104            write(fd, buffer, strlen(buffer));
5105            mOutputProfiles[i]->dump(fd);
5106        }
5107    }
5108    if (mInputProfiles.size()) {
5109        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5110        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5111            snprintf(buffer, SIZE, "    input %zu:\n", i);
5112            write(fd, buffer, strlen(buffer));
5113            mInputProfiles[i]->dump(fd);
5114        }
5115    }
5116    if (mDeclaredDevices.size()) {
5117        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5118        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5119            mDeclaredDevices[i]->dump(fd, 4, i);
5120        }
5121    }
5122}
5123
5124// --- AudioPort class implementation
5125
5126
5127AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5128          audio_port_role_t role, const sp<HwModule>& module) :
5129    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5130{
5131    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5132                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5133}
5134
5135void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5136{
5137    port->role = mRole;
5138    port->type = mType;
5139    unsigned int i;
5140    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5141        port->sample_rates[i] = mSamplingRates[i];
5142    }
5143    port->num_sample_rates = i;
5144    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5145        port->channel_masks[i] = mChannelMasks[i];
5146    }
5147    port->num_channel_masks = i;
5148    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5149        port->formats[i] = mFormats[i];
5150    }
5151    port->num_formats = i;
5152
5153    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5154
5155    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5156        port->gains[i] = mGains[i]->mGain;
5157    }
5158    port->num_gains = i;
5159}
5160
5161
5162void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5163{
5164    char *str = strtok(name, "|");
5165
5166    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5167    // rates should be read from the output stream after it is opened for the first time
5168    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5169        mSamplingRates.add(0);
5170        return;
5171    }
5172
5173    while (str != NULL) {
5174        uint32_t rate = atoi(str);
5175        if (rate != 0) {
5176            ALOGV("loadSamplingRates() adding rate %d", rate);
5177            mSamplingRates.add(rate);
5178        }
5179        str = strtok(NULL, "|");
5180    }
5181}
5182
5183void AudioPolicyManager::AudioPort::loadFormats(char *name)
5184{
5185    char *str = strtok(name, "|");
5186
5187    // by convention, "0' in the first entry in mFormats indicates the supported formats
5188    // should be read from the output stream after it is opened for the first time
5189    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5190        mFormats.add(AUDIO_FORMAT_DEFAULT);
5191        return;
5192    }
5193
5194    while (str != NULL) {
5195        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5196                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5197                                                             str);
5198        if (format != AUDIO_FORMAT_DEFAULT) {
5199            mFormats.add(format);
5200        }
5201        str = strtok(NULL, "|");
5202    }
5203}
5204
5205void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5206{
5207    const char *str = strtok(name, "|");
5208
5209    ALOGV("loadInChannels() %s", name);
5210
5211    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5212        mChannelMasks.add(0);
5213        return;
5214    }
5215
5216    while (str != NULL) {
5217        audio_channel_mask_t channelMask =
5218                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5219                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5220                                                   str);
5221        if (channelMask != 0) {
5222            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5223            mChannelMasks.add(channelMask);
5224        }
5225        str = strtok(NULL, "|");
5226    }
5227}
5228
5229void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5230{
5231    const char *str = strtok(name, "|");
5232
5233    ALOGV("loadOutChannels() %s", name);
5234
5235    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5236    // masks should be read from the output stream after it is opened for the first time
5237    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5238        mChannelMasks.add(0);
5239        return;
5240    }
5241
5242    while (str != NULL) {
5243        audio_channel_mask_t channelMask =
5244                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5245                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5246                                                   str);
5247        if (channelMask != 0) {
5248            mChannelMasks.add(channelMask);
5249        }
5250        str = strtok(NULL, "|");
5251    }
5252    return;
5253}
5254
5255audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5256{
5257    const char *str = strtok(name, "|");
5258
5259    ALOGV("loadGainMode() %s", name);
5260    audio_gain_mode_t mode = 0;
5261    while (str != NULL) {
5262        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5263                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5264                                                str);
5265        str = strtok(NULL, "|");
5266    }
5267    return mode;
5268}
5269
5270void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5271{
5272    cnode *node = root->first_child;
5273
5274    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5275
5276    while (node) {
5277        if (strcmp(node->name, GAIN_MODE) == 0) {
5278            gain->mGain.mode = loadGainMode((char *)node->value);
5279        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5280            if (mUseInChannelMask) {
5281                gain->mGain.channel_mask =
5282                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5283                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5284                                                           (char *)node->value);
5285            } else {
5286                gain->mGain.channel_mask =
5287                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5288                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5289                                                           (char *)node->value);
5290            }
5291        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5292            gain->mGain.min_value = atoi((char *)node->value);
5293        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5294            gain->mGain.max_value = atoi((char *)node->value);
5295        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5296            gain->mGain.default_value = atoi((char *)node->value);
5297        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5298            gain->mGain.step_value = atoi((char *)node->value);
5299        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5300            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5301        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5302            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5303        }
5304        node = node->next;
5305    }
5306
5307    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5308          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5309
5310    if (gain->mGain.mode == 0) {
5311        return;
5312    }
5313    mGains.add(gain);
5314}
5315
5316void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5317{
5318    cnode *node = root->first_child;
5319    int index = 0;
5320    while (node) {
5321        ALOGV("loadGains() loading gain %s", node->name);
5322        loadGain(node, index++);
5323        node = node->next;
5324    }
5325}
5326
5327status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5328{
5329    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5330        if (mSamplingRates[i] == samplingRate) {
5331            return NO_ERROR;
5332        }
5333    }
5334    return BAD_VALUE;
5335}
5336
5337status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5338        uint32_t *updatedSamplingRate) const
5339{
5340    // Search for the closest supported sampling rate that is above (preferred)
5341    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5342    // The sampling rates do not need to be sorted in ascending order.
5343    ssize_t maxBelow = -1;
5344    ssize_t minAbove = -1;
5345    uint32_t candidate;
5346    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5347        candidate = mSamplingRates[i];
5348        if (candidate == samplingRate) {
5349            if (updatedSamplingRate != NULL) {
5350                *updatedSamplingRate = candidate;
5351            }
5352            return NO_ERROR;
5353        }
5354        // candidate < desired
5355        if (candidate < samplingRate) {
5356            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5357                maxBelow = i;
5358            }
5359        // candidate > desired
5360        } else {
5361            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5362                minAbove = i;
5363            }
5364        }
5365    }
5366    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5367    // TODO Move these assumptions out.
5368    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5369    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5370                                                    // due to approximation by an int32_t of the
5371                                                    // phase increments
5372    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5373    if (minAbove >= 0) {
5374        candidate = mSamplingRates[minAbove];
5375        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5376            if (updatedSamplingRate != NULL) {
5377                *updatedSamplingRate = candidate;
5378            }
5379            return NO_ERROR;
5380        }
5381    }
5382    // But if we have to up-sample from a lower sampling rate, that's OK.
5383    if (maxBelow >= 0) {
5384        candidate = mSamplingRates[maxBelow];
5385        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5386            if (updatedSamplingRate != NULL) {
5387                *updatedSamplingRate = candidate;
5388            }
5389            return NO_ERROR;
5390        }
5391    }
5392    // leave updatedSamplingRate unmodified
5393    return BAD_VALUE;
5394}
5395
5396status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5397{
5398    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5399        if (mChannelMasks[i] == channelMask) {
5400            return NO_ERROR;
5401        }
5402    }
5403    return BAD_VALUE;
5404}
5405
5406status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5407        const
5408{
5409    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5410    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5411        // FIXME Does not handle multi-channel automatic conversions yet
5412        audio_channel_mask_t supported = mChannelMasks[i];
5413        if (supported == channelMask) {
5414            return NO_ERROR;
5415        }
5416        if (isRecordThread) {
5417            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5418            // FIXME Abstract this out to a table.
5419            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5420                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5421                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5422                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5423                return NO_ERROR;
5424            }
5425        }
5426    }
5427    return BAD_VALUE;
5428}
5429
5430status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
5431{
5432    for (size_t i = 0; i < mFormats.size(); i ++) {
5433        if (mFormats[i] == format) {
5434            return NO_ERROR;
5435        }
5436    }
5437    return BAD_VALUE;
5438}
5439
5440
5441uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
5442{
5443    // special case for uninitialized dynamic profile
5444    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
5445        return 0;
5446    }
5447
5448    uint32_t samplingRate = 0;
5449    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
5450
5451    // For mixed output and inputs, use max mixer sampling rates. Do not
5452    // limit sampling rate otherwise
5453    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5454            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5455            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5456        maxRate = UINT_MAX;
5457    }
5458    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5459        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
5460            samplingRate = mSamplingRates[i];
5461        }
5462    }
5463    return samplingRate;
5464}
5465
5466audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
5467{
5468    // special case for uninitialized dynamic profile
5469    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
5470        return AUDIO_CHANNEL_NONE;
5471    }
5472
5473    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
5474    uint32_t channelCount = 0;
5475    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
5476
5477    // For mixed output and inputs, use max mixer channel count. Do not
5478    // limit channel count otherwise
5479    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5480            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5481            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5482        maxCount = UINT_MAX;
5483    }
5484    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5485        uint32_t cnlCount;
5486        if (mUseInChannelMask) {
5487            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
5488        } else {
5489            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
5490        }
5491        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
5492            channelMask = mChannelMasks[i];
5493        }
5494    }
5495    return channelMask;
5496}
5497
5498const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
5499        AUDIO_FORMAT_DEFAULT,
5500        AUDIO_FORMAT_PCM_16_BIT,
5501        AUDIO_FORMAT_PCM_8_24_BIT,
5502        AUDIO_FORMAT_PCM_24_BIT_PACKED,
5503        AUDIO_FORMAT_PCM_32_BIT,
5504};
5505
5506int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
5507                                                  audio_format_t format2)
5508{
5509    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
5510    // compressed format and better than any PCM format. This is by design of pickFormat()
5511    if (!audio_is_linear_pcm(format1)) {
5512        if (!audio_is_linear_pcm(format2)) {
5513            return 0;
5514        }
5515        return 1;
5516    }
5517    if (!audio_is_linear_pcm(format2)) {
5518        return -1;
5519    }
5520
5521    int index1 = -1, index2 = -1;
5522    for (size_t i = 0;
5523            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
5524            i ++) {
5525        if (sPcmFormatCompareTable[i] == format1) {
5526            index1 = i;
5527        }
5528        if (sPcmFormatCompareTable[i] == format2) {
5529            index2 = i;
5530        }
5531    }
5532    // format1 not found => index1 < 0 => format2 > format1
5533    // format2 not found => index2 < 0 => format2 < format1
5534    return index1 - index2;
5535}
5536
5537audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
5538{
5539    // special case for uninitialized dynamic profile
5540    if (mFormats.size() == 1 && mFormats[0] == 0) {
5541        return AUDIO_FORMAT_DEFAULT;
5542    }
5543
5544    audio_format_t format = AUDIO_FORMAT_DEFAULT;
5545    audio_format_t bestFormat = BEST_MIXER_FORMAT;
5546    // For mixed output and inputs, use best mixer output format. Do not
5547    // limit format otherwise
5548    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5549            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5550             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
5551        bestFormat = AUDIO_FORMAT_INVALID;
5552    }
5553
5554    for (size_t i = 0; i < mFormats.size(); i ++) {
5555        if ((compareFormats(mFormats[i], format) > 0) &&
5556                (compareFormats(mFormats[i], bestFormat) <= 0)) {
5557            format = mFormats[i];
5558        }
5559    }
5560    return format;
5561}
5562
5563status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
5564                                                  int index) const
5565{
5566    if (index < 0 || (size_t)index >= mGains.size()) {
5567        return BAD_VALUE;
5568    }
5569    return mGains[index]->checkConfig(gainConfig);
5570}
5571
5572void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
5573{
5574    const size_t SIZE = 256;
5575    char buffer[SIZE];
5576    String8 result;
5577
5578    if (mName.size() != 0) {
5579        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
5580        result.append(buffer);
5581    }
5582
5583    if (mSamplingRates.size() != 0) {
5584        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
5585        result.append(buffer);
5586        for (size_t i = 0; i < mSamplingRates.size(); i++) {
5587            if (i == 0 && mSamplingRates[i] == 0) {
5588                snprintf(buffer, SIZE, "Dynamic");
5589            } else {
5590                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
5591            }
5592            result.append(buffer);
5593            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
5594        }
5595        result.append("\n");
5596    }
5597
5598    if (mChannelMasks.size() != 0) {
5599        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
5600        result.append(buffer);
5601        for (size_t i = 0; i < mChannelMasks.size(); i++) {
5602            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
5603
5604            if (i == 0 && mChannelMasks[i] == 0) {
5605                snprintf(buffer, SIZE, "Dynamic");
5606            } else {
5607                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
5608            }
5609            result.append(buffer);
5610            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
5611        }
5612        result.append("\n");
5613    }
5614
5615    if (mFormats.size() != 0) {
5616        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
5617        result.append(buffer);
5618        for (size_t i = 0; i < mFormats.size(); i++) {
5619            const char *formatStr = enumToString(sFormatNameToEnumTable,
5620                                                 ARRAY_SIZE(sFormatNameToEnumTable),
5621                                                 mFormats[i]);
5622            if (i == 0 && strcmp(formatStr, "") == 0) {
5623                snprintf(buffer, SIZE, "Dynamic");
5624            } else {
5625                snprintf(buffer, SIZE, "%-48s", formatStr);
5626            }
5627            result.append(buffer);
5628            result.append(i == (mFormats.size() - 1) ? "" : ", ");
5629        }
5630        result.append("\n");
5631    }
5632    write(fd, result.string(), result.size());
5633    if (mGains.size() != 0) {
5634        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
5635        write(fd, buffer, strlen(buffer) + 1);
5636        result.append(buffer);
5637        for (size_t i = 0; i < mGains.size(); i++) {
5638            mGains[i]->dump(fd, spaces + 2, i);
5639        }
5640    }
5641}
5642
5643// --- AudioGain class implementation
5644
5645AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
5646{
5647    mIndex = index;
5648    mUseInChannelMask = useInChannelMask;
5649    memset(&mGain, 0, sizeof(struct audio_gain));
5650}
5651
5652void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
5653{
5654    config->index = mIndex;
5655    config->mode = mGain.mode;
5656    config->channel_mask = mGain.channel_mask;
5657    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
5658        config->values[0] = mGain.default_value;
5659    } else {
5660        uint32_t numValues;
5661        if (mUseInChannelMask) {
5662            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
5663        } else {
5664            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
5665        }
5666        for (size_t i = 0; i < numValues; i++) {
5667            config->values[i] = mGain.default_value;
5668        }
5669    }
5670    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
5671        config->ramp_duration_ms = mGain.min_ramp_ms;
5672    }
5673}
5674
5675status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
5676{
5677    if ((config->mode & ~mGain.mode) != 0) {
5678        return BAD_VALUE;
5679    }
5680    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
5681        if ((config->values[0] < mGain.min_value) ||
5682                    (config->values[0] > mGain.max_value)) {
5683            return BAD_VALUE;
5684        }
5685    } else {
5686        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
5687            return BAD_VALUE;
5688        }
5689        uint32_t numValues;
5690        if (mUseInChannelMask) {
5691            numValues = audio_channel_count_from_in_mask(config->channel_mask);
5692        } else {
5693            numValues = audio_channel_count_from_out_mask(config->channel_mask);
5694        }
5695        for (size_t i = 0; i < numValues; i++) {
5696            if ((config->values[i] < mGain.min_value) ||
5697                    (config->values[i] > mGain.max_value)) {
5698                return BAD_VALUE;
5699            }
5700        }
5701    }
5702    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
5703        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
5704                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
5705            return BAD_VALUE;
5706        }
5707    }
5708    return NO_ERROR;
5709}
5710
5711void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
5712{
5713    const size_t SIZE = 256;
5714    char buffer[SIZE];
5715    String8 result;
5716
5717    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
5718    result.append(buffer);
5719    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
5720    result.append(buffer);
5721    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
5722    result.append(buffer);
5723    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
5724    result.append(buffer);
5725    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
5726    result.append(buffer);
5727    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
5728    result.append(buffer);
5729    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
5730    result.append(buffer);
5731    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
5732    result.append(buffer);
5733    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
5734    result.append(buffer);
5735
5736    write(fd, result.string(), result.size());
5737}
5738
5739// --- AudioPortConfig class implementation
5740
5741AudioPolicyManager::AudioPortConfig::AudioPortConfig()
5742{
5743    mSamplingRate = 0;
5744    mChannelMask = AUDIO_CHANNEL_NONE;
5745    mFormat = AUDIO_FORMAT_INVALID;
5746    mGain.index = -1;
5747}
5748
5749status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
5750                                                        const struct audio_port_config *config,
5751                                                        struct audio_port_config *backupConfig)
5752{
5753    struct audio_port_config localBackupConfig;
5754    status_t status = NO_ERROR;
5755
5756    localBackupConfig.config_mask = config->config_mask;
5757    toAudioPortConfig(&localBackupConfig);
5758
5759    if (mAudioPort == 0) {
5760        status = NO_INIT;
5761        goto exit;
5762    }
5763    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
5764        status = mAudioPort->checkExactSamplingRate(config->sample_rate);
5765        if (status != NO_ERROR) {
5766            goto exit;
5767        }
5768        mSamplingRate = config->sample_rate;
5769    }
5770    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
5771        status = mAudioPort->checkExactChannelMask(config->channel_mask);
5772        if (status != NO_ERROR) {
5773            goto exit;
5774        }
5775        mChannelMask = config->channel_mask;
5776    }
5777    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
5778        status = mAudioPort->checkFormat(config->format);
5779        if (status != NO_ERROR) {
5780            goto exit;
5781        }
5782        mFormat = config->format;
5783    }
5784    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
5785        status = mAudioPort->checkGain(&config->gain, config->gain.index);
5786        if (status != NO_ERROR) {
5787            goto exit;
5788        }
5789        mGain = config->gain;
5790    }
5791
5792exit:
5793    if (status != NO_ERROR) {
5794        applyAudioPortConfig(&localBackupConfig);
5795    }
5796    if (backupConfig != NULL) {
5797        *backupConfig = localBackupConfig;
5798    }
5799    return status;
5800}
5801
5802void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
5803                                                    struct audio_port_config *dstConfig,
5804                                                    const struct audio_port_config *srcConfig) const
5805{
5806    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
5807        dstConfig->sample_rate = mSamplingRate;
5808        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
5809            dstConfig->sample_rate = srcConfig->sample_rate;
5810        }
5811    } else {
5812        dstConfig->sample_rate = 0;
5813    }
5814    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
5815        dstConfig->channel_mask = mChannelMask;
5816        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
5817            dstConfig->channel_mask = srcConfig->channel_mask;
5818        }
5819    } else {
5820        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
5821    }
5822    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
5823        dstConfig->format = mFormat;
5824        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
5825            dstConfig->format = srcConfig->format;
5826        }
5827    } else {
5828        dstConfig->format = AUDIO_FORMAT_INVALID;
5829    }
5830    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
5831        dstConfig->gain = mGain;
5832        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
5833            dstConfig->gain = srcConfig->gain;
5834        }
5835    } else {
5836        dstConfig->gain.index = -1;
5837    }
5838    if (dstConfig->gain.index != -1) {
5839        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
5840    } else {
5841        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
5842    }
5843}
5844
5845// --- IOProfile class implementation
5846
5847AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
5848                                         const sp<HwModule>& module)
5849    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
5850{
5851}
5852
5853AudioPolicyManager::IOProfile::~IOProfile()
5854{
5855}
5856
5857// checks if the IO profile is compatible with specified parameters.
5858// Sampling rate, format and channel mask must be specified in order to
5859// get a valid a match
5860bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
5861                                                            uint32_t samplingRate,
5862                                                            uint32_t *updatedSamplingRate,
5863                                                            audio_format_t format,
5864                                                            audio_channel_mask_t channelMask,
5865                                                            audio_output_flags_t flags) const
5866{
5867    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
5868    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5869    ALOG_ASSERT(isPlaybackThread != isRecordThread);
5870
5871    if ((mSupportedDevices.types() & device) != device) {
5872        return false;
5873    }
5874
5875    if (samplingRate == 0) {
5876         return false;
5877    }
5878    uint32_t myUpdatedSamplingRate = samplingRate;
5879    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
5880         return false;
5881    }
5882    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
5883            NO_ERROR) {
5884         return false;
5885    }
5886
5887    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
5888        return false;
5889    }
5890
5891    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
5892            checkExactChannelMask(channelMask) != NO_ERROR)) {
5893        return false;
5894    }
5895    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
5896            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
5897        return false;
5898    }
5899
5900    if (isPlaybackThread && (mFlags & flags) != flags) {
5901        return false;
5902    }
5903    // The only input flag that is allowed to be different is the fast flag.
5904    // An existing fast stream is compatible with a normal track request.
5905    // An existing normal stream is compatible with a fast track request,
5906    // but the fast request will be denied by AudioFlinger and converted to normal track.
5907    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
5908            ~AUDIO_INPUT_FLAG_FAST)) {
5909        return false;
5910    }
5911
5912    if (updatedSamplingRate != NULL) {
5913        *updatedSamplingRate = myUpdatedSamplingRate;
5914    }
5915    return true;
5916}
5917
5918void AudioPolicyManager::IOProfile::dump(int fd)
5919{
5920    const size_t SIZE = 256;
5921    char buffer[SIZE];
5922    String8 result;
5923
5924    AudioPort::dump(fd, 4);
5925
5926    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
5927    result.append(buffer);
5928    snprintf(buffer, SIZE, "    - devices:\n");
5929    result.append(buffer);
5930    write(fd, result.string(), result.size());
5931    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
5932        mSupportedDevices[i]->dump(fd, 6, i);
5933    }
5934}
5935
5936void AudioPolicyManager::IOProfile::log()
5937{
5938    const size_t SIZE = 256;
5939    char buffer[SIZE];
5940    String8 result;
5941
5942    ALOGV("    - sampling rates: ");
5943    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5944        ALOGV("  %d", mSamplingRates[i]);
5945    }
5946
5947    ALOGV("    - channel masks: ");
5948    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5949        ALOGV("  0x%04x", mChannelMasks[i]);
5950    }
5951
5952    ALOGV("    - formats: ");
5953    for (size_t i = 0; i < mFormats.size(); i++) {
5954        ALOGV("  0x%08x", mFormats[i]);
5955    }
5956
5957    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
5958    ALOGV("    - flags: 0x%04x\n", mFlags);
5959}
5960
5961
5962// --- DeviceDescriptor implementation
5963
5964
5965AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
5966                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
5967                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
5968                                                              AUDIO_PORT_ROLE_SOURCE,
5969                             NULL),
5970                     mDeviceType(type), mAddress(""), mId(0)
5971{
5972    mAudioPort = this;
5973    if (mGains.size() > 0) {
5974        mGains[0]->getDefaultConfig(&mGain);
5975    }
5976}
5977
5978bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
5979{
5980    // Devices are considered equal if they:
5981    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
5982    // - have the same address or one device does not specify the address
5983    // - have the same channel mask or one device does not specify the channel mask
5984    return (mDeviceType == other->mDeviceType) &&
5985           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
5986           (mChannelMask == 0 || other->mChannelMask == 0 ||
5987                mChannelMask == other->mChannelMask);
5988}
5989
5990void AudioPolicyManager::DeviceVector::refreshTypes()
5991{
5992    mDeviceTypes = AUDIO_DEVICE_NONE;
5993    for(size_t i = 0; i < size(); i++) {
5994        mDeviceTypes |= itemAt(i)->mDeviceType;
5995    }
5996    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
5997}
5998
5999ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6000{
6001    for(size_t i = 0; i < size(); i++) {
6002        if (item->equals(itemAt(i))) {
6003            return i;
6004        }
6005    }
6006    return -1;
6007}
6008
6009ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6010{
6011    ssize_t ret = indexOf(item);
6012
6013    if (ret < 0) {
6014        ret = SortedVector::add(item);
6015        if (ret >= 0) {
6016            refreshTypes();
6017        }
6018    } else {
6019        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6020        ret = -1;
6021    }
6022    return ret;
6023}
6024
6025ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6026{
6027    size_t i;
6028    ssize_t ret = indexOf(item);
6029
6030    if (ret < 0) {
6031        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6032    } else {
6033        ret = SortedVector::removeAt(ret);
6034        if (ret >= 0) {
6035            refreshTypes();
6036        }
6037    }
6038    return ret;
6039}
6040
6041void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6042{
6043    DeviceVector deviceList;
6044
6045    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6046    types &= ~role_bit;
6047
6048    while (types) {
6049        uint32_t i = 31 - __builtin_clz(types);
6050        uint32_t type = 1 << i;
6051        types &= ~type;
6052        add(new DeviceDescriptor(String8(""), type | role_bit));
6053    }
6054}
6055
6056void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6057                                                           const DeviceVector& declaredDevices)
6058{
6059    char *devName = strtok(name, "|");
6060    while (devName != NULL) {
6061        if (strlen(devName) != 0) {
6062            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6063                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6064                                 devName);
6065            if (type != AUDIO_DEVICE_NONE) {
6066                add(new DeviceDescriptor(String8(""), type));
6067            } else {
6068                sp<DeviceDescriptor> deviceDesc =
6069                        declaredDevices.getDeviceFromName(String8(devName));
6070                if (deviceDesc != 0) {
6071                    add(deviceDesc);
6072                }
6073            }
6074         }
6075        devName = strtok(NULL, "|");
6076     }
6077}
6078
6079sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6080                                                        audio_devices_t type, String8 address) const
6081{
6082    sp<DeviceDescriptor> device;
6083    for (size_t i = 0; i < size(); i++) {
6084        if (itemAt(i)->mDeviceType == type) {
6085            device = itemAt(i);
6086            if (itemAt(i)->mAddress = address) {
6087                break;
6088            }
6089        }
6090    }
6091    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6092          type, address.string(), device.get());
6093    return device;
6094}
6095
6096sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6097                                                                    audio_port_handle_t id) const
6098{
6099    sp<DeviceDescriptor> device;
6100    for (size_t i = 0; i < size(); i++) {
6101        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6102        if (itemAt(i)->mId == id) {
6103            device = itemAt(i);
6104            break;
6105        }
6106    }
6107    return device;
6108}
6109
6110AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6111                                                                        audio_devices_t type) const
6112{
6113    DeviceVector devices;
6114    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6115        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6116            devices.add(itemAt(i));
6117            type &= ~itemAt(i)->mDeviceType;
6118            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6119                  itemAt(i)->mDeviceType, itemAt(i).get());
6120        }
6121    }
6122    return devices;
6123}
6124
6125AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6126        audio_devices_t type, String8 address) const
6127{
6128    DeviceVector devices;
6129    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6130    for (size_t i = 0; i < size(); i++) {
6131        //ALOGV("     at i=%d: device=%x, addr=%s",
6132        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6133        if (itemAt(i)->mDeviceType == type) {
6134            if (itemAt(i)->mAddress == address) {
6135                //ALOGV("      found matching address %s", address.string());
6136                devices.add(itemAt(i));
6137            }
6138        }
6139    }
6140    return devices;
6141}
6142
6143sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6144        const String8& name) const
6145{
6146    sp<DeviceDescriptor> device;
6147    for (size_t i = 0; i < size(); i++) {
6148        if (itemAt(i)->mName == name) {
6149            device = itemAt(i);
6150            break;
6151        }
6152    }
6153    return device;
6154}
6155
6156void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6157                                                    struct audio_port_config *dstConfig,
6158                                                    const struct audio_port_config *srcConfig) const
6159{
6160    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6161    if (srcConfig != NULL) {
6162        dstConfig->config_mask |= srcConfig->config_mask;
6163    }
6164
6165    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6166
6167    dstConfig->id = mId;
6168    dstConfig->role = audio_is_output_device(mDeviceType) ?
6169                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6170    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6171    dstConfig->ext.device.type = mDeviceType;
6172    dstConfig->ext.device.hw_module = mModule->mHandle;
6173    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6174}
6175
6176void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6177{
6178    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6179    AudioPort::toAudioPort(port);
6180    port->id = mId;
6181    toAudioPortConfig(&port->active_config);
6182    port->ext.device.type = mDeviceType;
6183    port->ext.device.hw_module = mModule->mHandle;
6184    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6185}
6186
6187status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6188{
6189    const size_t SIZE = 256;
6190    char buffer[SIZE];
6191    String8 result;
6192
6193    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6194    result.append(buffer);
6195    if (mId != 0) {
6196        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6197        result.append(buffer);
6198    }
6199    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6200                                              enumToString(sDeviceNameToEnumTable,
6201                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6202                                                           mDeviceType));
6203    result.append(buffer);
6204    if (mAddress.size() != 0) {
6205        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6206        result.append(buffer);
6207    }
6208    write(fd, result.string(), result.size());
6209    AudioPort::dump(fd, spaces);
6210
6211    return NO_ERROR;
6212}
6213
6214
6215// --- audio_policy.conf file parsing
6216
6217audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6218{
6219    uint32_t flag = 0;
6220
6221    // it is OK to cast name to non const here as we are not going to use it after
6222    // strtok() modifies it
6223    char *flagName = strtok(name, "|");
6224    while (flagName != NULL) {
6225        if (strlen(flagName) != 0) {
6226            flag |= stringToEnum(sFlagNameToEnumTable,
6227                               ARRAY_SIZE(sFlagNameToEnumTable),
6228                               flagName);
6229        }
6230        flagName = strtok(NULL, "|");
6231    }
6232    //force direct flag if offload flag is set: offloading implies a direct output stream
6233    // and all common behaviors are driven by checking only the direct flag
6234    // this should normally be set appropriately in the policy configuration file
6235    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6236        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6237    }
6238
6239    return (audio_output_flags_t)flag;
6240}
6241
6242audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6243{
6244    uint32_t device = 0;
6245
6246    char *devName = strtok(name, "|");
6247    while (devName != NULL) {
6248        if (strlen(devName) != 0) {
6249            device |= stringToEnum(sDeviceNameToEnumTable,
6250                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6251                                 devName);
6252         }
6253        devName = strtok(NULL, "|");
6254     }
6255    return device;
6256}
6257
6258void AudioPolicyManager::loadHwModule(cnode *root)
6259{
6260    status_t status = NAME_NOT_FOUND;
6261    cnode *node;
6262    sp<HwModule> module = new HwModule(root->name);
6263
6264    node = config_find(root, DEVICES_TAG);
6265    if (node != NULL) {
6266        node = node->first_child;
6267        while (node) {
6268            ALOGV("loadHwModule() loading device %s", node->name);
6269            status_t tmpStatus = module->loadDevice(node);
6270            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6271                status = tmpStatus;
6272            }
6273            node = node->next;
6274        }
6275    }
6276    node = config_find(root, OUTPUTS_TAG);
6277    if (node != NULL) {
6278        node = node->first_child;
6279        while (node) {
6280            ALOGV("loadHwModule() loading output %s", node->name);
6281            status_t tmpStatus = module->loadOutput(node);
6282            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6283                status = tmpStatus;
6284            }
6285            node = node->next;
6286        }
6287    }
6288    node = config_find(root, INPUTS_TAG);
6289    if (node != NULL) {
6290        node = node->first_child;
6291        while (node) {
6292            ALOGV("loadHwModule() loading input %s", node->name);
6293            status_t tmpStatus = module->loadInput(node);
6294            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6295                status = tmpStatus;
6296            }
6297            node = node->next;
6298        }
6299    }
6300    loadGlobalConfig(root, module);
6301
6302    if (status == NO_ERROR) {
6303        mHwModules.add(module);
6304    }
6305}
6306
6307void AudioPolicyManager::loadHwModules(cnode *root)
6308{
6309    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6310    if (node == NULL) {
6311        return;
6312    }
6313
6314    node = node->first_child;
6315    while (node) {
6316        ALOGV("loadHwModules() loading module %s", node->name);
6317        loadHwModule(node);
6318        node = node->next;
6319    }
6320}
6321
6322void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6323{
6324    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6325
6326    if (node == NULL) {
6327        return;
6328    }
6329    DeviceVector declaredDevices;
6330    if (module != NULL) {
6331        declaredDevices = module->mDeclaredDevices;
6332    }
6333
6334    node = node->first_child;
6335    while (node) {
6336        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6337            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6338                                                        declaredDevices);
6339            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6340                  mAvailableOutputDevices.types());
6341        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6342            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6343                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6344                                              (char *)node->value);
6345            if (device != AUDIO_DEVICE_NONE) {
6346                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6347            } else {
6348                ALOGW("loadGlobalConfig() default device not specified");
6349            }
6350            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6351        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6352            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6353                                                       declaredDevices);
6354            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6355        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6356            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6357            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6358        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6359            uint32_t major, minor;
6360            sscanf((char *)node->value, "%u.%u", &major, &minor);
6361            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6362            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6363                  module->mHalVersion, major, minor);
6364        }
6365        node = node->next;
6366    }
6367}
6368
6369status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6370{
6371    cnode *root;
6372    char *data;
6373
6374    data = (char *)load_file(path, NULL);
6375    if (data == NULL) {
6376        return -ENODEV;
6377    }
6378    root = config_node("", "");
6379    config_load(root, data);
6380
6381    loadHwModules(root);
6382    // legacy audio_policy.conf files have one global_configuration section
6383    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
6384    config_free(root);
6385    free(root);
6386    free(data);
6387
6388    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
6389
6390    return NO_ERROR;
6391}
6392
6393void AudioPolicyManager::defaultAudioPolicyConfig(void)
6394{
6395    sp<HwModule> module;
6396    sp<IOProfile> profile;
6397    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
6398                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
6399    mAvailableOutputDevices.add(mDefaultOutputDevice);
6400    mAvailableInputDevices.add(defaultInputDevice);
6401
6402    module = new HwModule("primary");
6403
6404    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
6405    profile->mSamplingRates.add(44100);
6406    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6407    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
6408    profile->mSupportedDevices.add(mDefaultOutputDevice);
6409    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
6410    module->mOutputProfiles.add(profile);
6411
6412    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
6413    profile->mSamplingRates.add(8000);
6414    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6415    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
6416    profile->mSupportedDevices.add(defaultInputDevice);
6417    module->mInputProfiles.add(profile);
6418
6419    mHwModules.add(module);
6420}
6421
6422audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
6423{
6424    // flags to stream type mapping
6425    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
6426        return AUDIO_STREAM_ENFORCED_AUDIBLE;
6427    }
6428    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
6429        return AUDIO_STREAM_BLUETOOTH_SCO;
6430    }
6431
6432    // usage to stream type mapping
6433    switch (attr->usage) {
6434    case AUDIO_USAGE_MEDIA:
6435    case AUDIO_USAGE_GAME:
6436    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
6437    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
6438        return AUDIO_STREAM_MUSIC;
6439    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
6440        return AUDIO_STREAM_SYSTEM;
6441    case AUDIO_USAGE_VOICE_COMMUNICATION:
6442        return AUDIO_STREAM_VOICE_CALL;
6443
6444    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
6445        return AUDIO_STREAM_DTMF;
6446
6447    case AUDIO_USAGE_ALARM:
6448        return AUDIO_STREAM_ALARM;
6449    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
6450        return AUDIO_STREAM_RING;
6451
6452    case AUDIO_USAGE_NOTIFICATION:
6453    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
6454    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
6455    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
6456    case AUDIO_USAGE_NOTIFICATION_EVENT:
6457        return AUDIO_STREAM_NOTIFICATION;
6458
6459    case AUDIO_USAGE_UNKNOWN:
6460    default:
6461        return AUDIO_STREAM_MUSIC;
6462    }
6463}
6464}; // namespace android
6465