AudioSystem.cpp revision 2dadcda205d995f7094b7569b076921872505143 
1/*
2 * Copyright (C) 2006-2007 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 "AudioSystem"
18//#define LOG_NDEBUG 0
19
20#include <utils/Log.h>
21#include <binder/IServiceManager.h>
22#include <media/AudioSystem.h>
23#include <media/IAudioPolicyService.h>
24#include <math.h>
25
26// ----------------------------------------------------------------------------
27// the sim build doesn't have gettid
28
29#ifndef HAVE_GETTID
30# define gettid getpid
31#endif
32
33// ----------------------------------------------------------------------------
34
35namespace android {
36
37// client singleton for AudioFlinger binder interface
38Mutex AudioSystem::gLock;
39sp<IAudioFlinger> AudioSystem::gAudioFlinger;
40sp<AudioSystem::AudioFlingerClient> AudioSystem::gAudioFlingerClient;
41audio_error_callback AudioSystem::gAudioErrorCallback = NULL;
42// Cached values
43DefaultKeyedVector<int, audio_io_handle_t> AudioSystem::gStreamOutputMap(0);
44DefaultKeyedVector<audio_io_handle_t, AudioSystem::OutputDescriptor *> AudioSystem::gOutputs(0);
45
46// Cached values for recording queries
47uint32_t AudioSystem::gPrevInSamplingRate = 16000;
48int AudioSystem::gPrevInFormat = AudioSystem::PCM_16_BIT;
49int AudioSystem::gPrevInChannelCount = 1;
50size_t AudioSystem::gInBuffSize = 0;
51
52
53// establish binder interface to AudioFlinger service
54const sp<IAudioFlinger>& AudioSystem::get_audio_flinger()
55{
56    Mutex::Autolock _l(gLock);
57    if (gAudioFlinger.get() == 0) {
58        sp<IServiceManager> sm = defaultServiceManager();
59        sp<IBinder> binder;
60        do {
61            binder = sm->getService(String16("media.audio_flinger"));
62            if (binder != 0)
63                break;
64            LOGW("AudioFlinger not published, waiting...");
65            usleep(500000); // 0.5 s
66        } while(true);
67        if (gAudioFlingerClient == NULL) {
68            gAudioFlingerClient = new AudioFlingerClient();
69        } else {
70            if (gAudioErrorCallback) {
71                gAudioErrorCallback(NO_ERROR);
72            }
73         }
74        binder->linkToDeath(gAudioFlingerClient);
75        gAudioFlinger = interface_cast<IAudioFlinger>(binder);
76        gAudioFlinger->registerClient(gAudioFlingerClient);
77    }
78    LOGE_IF(gAudioFlinger==0, "no AudioFlinger!?");
79
80    return gAudioFlinger;
81}
82
83status_t AudioSystem::muteMicrophone(bool state) {
84    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
85    if (af == 0) return PERMISSION_DENIED;
86    return af->setMicMute(state);
87}
88
89status_t AudioSystem::isMicrophoneMuted(bool* state) {
90    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
91    if (af == 0) return PERMISSION_DENIED;
92    *state = af->getMicMute();
93    return NO_ERROR;
94}
95
96status_t AudioSystem::setMasterVolume(float value)
97{
98    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
99    if (af == 0) return PERMISSION_DENIED;
100    af->setMasterVolume(value);
101    return NO_ERROR;
102}
103
104status_t AudioSystem::setMasterMute(bool mute)
105{
106    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
107    if (af == 0) return PERMISSION_DENIED;
108    af->setMasterMute(mute);
109    return NO_ERROR;
110}
111
112status_t AudioSystem::getMasterVolume(float* volume)
113{
114    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
115    if (af == 0) return PERMISSION_DENIED;
116    *volume = af->masterVolume();
117    return NO_ERROR;
118}
119
120status_t AudioSystem::getMasterMute(bool* mute)
121{
122    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
123    if (af == 0) return PERMISSION_DENIED;
124    *mute = af->masterMute();
125    return NO_ERROR;
126}
127
128status_t AudioSystem::setStreamVolume(int stream, float value, int output)
129{
130    if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
131    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
132    if (af == 0) return PERMISSION_DENIED;
133    af->setStreamVolume(stream, value, output);
134    return NO_ERROR;
135}
136
137status_t AudioSystem::setStreamMute(int stream, bool mute)
138{
139    if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
140    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
141    if (af == 0) return PERMISSION_DENIED;
142    af->setStreamMute(stream, mute);
143    return NO_ERROR;
144}
145
146status_t AudioSystem::getStreamVolume(int stream, float* volume, int output)
147{
148    if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
149    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
150    if (af == 0) return PERMISSION_DENIED;
151    *volume = af->streamVolume(stream, output);
152    return NO_ERROR;
153}
154
155status_t AudioSystem::getStreamMute(int stream, bool* mute)
156{
157    if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
158    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
159    if (af == 0) return PERMISSION_DENIED;
160    *mute = af->streamMute(stream);
161    return NO_ERROR;
162}
163
164status_t AudioSystem::setMode(int mode)
165{
166    if (mode >= NUM_MODES) return BAD_VALUE;
167    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
168    if (af == 0) return PERMISSION_DENIED;
169    return af->setMode(mode);
170}
171
172
173status_t AudioSystem::isStreamActive(int stream, bool* state) {
174    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
175    if (af == 0) return PERMISSION_DENIED;
176    *state = af->isStreamActive(stream);
177    return NO_ERROR;
178}
179
180
181status_t AudioSystem::setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs) {
182    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
183    if (af == 0) return PERMISSION_DENIED;
184    return af->setParameters(ioHandle, keyValuePairs);
185}
186
187String8 AudioSystem::getParameters(audio_io_handle_t ioHandle, const String8& keys) {
188    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
189    String8 result = String8("");
190    if (af == 0) return result;
191
192    result = af->getParameters(ioHandle, keys);
193    return result;
194}
195
196// convert volume steps to natural log scale
197
198// change this value to change volume scaling
199static const float dBPerStep = 0.5f;
200// shouldn't need to touch these
201static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f;
202static const float dBConvertInverse = 1.0f / dBConvert;
203
204float AudioSystem::linearToLog(int volume)
205{
206    // float v = volume ? exp(float(100 - volume) * dBConvert) : 0;
207    // LOGD("linearToLog(%d)=%f", volume, v);
208    // return v;
209    return volume ? exp(float(100 - volume) * dBConvert) : 0;
210}
211
212int AudioSystem::logToLinear(float volume)
213{
214    // int v = volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
215    // LOGD("logTolinear(%d)=%f", v, volume);
216    // return v;
217    return volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
218}
219
220status_t AudioSystem::getOutputSamplingRate(int* samplingRate, int streamType)
221{
222    OutputDescriptor *outputDesc;
223    audio_io_handle_t output;
224
225    if (streamType == DEFAULT) {
226        streamType = MUSIC;
227    }
228
229    output = getOutput((stream_type)streamType);
230    if (output == 0) {
231        return PERMISSION_DENIED;
232    }
233
234    gLock.lock();
235    outputDesc = AudioSystem::gOutputs.valueFor(output);
236    if (outputDesc == 0) {
237        LOGV("getOutputSamplingRate() no output descriptor for output %d in gOutputs", output);
238        gLock.unlock();
239        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
240        if (af == 0) return PERMISSION_DENIED;
241        *samplingRate = af->sampleRate(output);
242    } else {
243        LOGV("getOutputSamplingRate() reading from output desc");
244        *samplingRate = outputDesc->samplingRate;
245        gLock.unlock();
246    }
247
248    LOGV("getOutputSamplingRate() streamType %d, output %d, sampling rate %d", streamType, output, *samplingRate);
249
250    return NO_ERROR;
251}
252
253status_t AudioSystem::getOutputFrameCount(int* frameCount, int streamType)
254{
255    OutputDescriptor *outputDesc;
256    audio_io_handle_t output;
257
258    if (streamType == DEFAULT) {
259        streamType = MUSIC;
260    }
261
262    output = getOutput((stream_type)streamType);
263    if (output == 0) {
264        return PERMISSION_DENIED;
265    }
266
267    gLock.lock();
268    outputDesc = AudioSystem::gOutputs.valueFor(output);
269    if (outputDesc == 0) {
270        gLock.unlock();
271        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
272        if (af == 0) return PERMISSION_DENIED;
273        *frameCount = af->frameCount(output);
274    } else {
275        *frameCount = outputDesc->frameCount;
276        gLock.unlock();
277    }
278
279    LOGV("getOutputFrameCount() streamType %d, output %d, frameCount %d", streamType, output, *frameCount);
280
281    return NO_ERROR;
282}
283
284status_t AudioSystem::getOutputLatency(uint32_t* latency, int streamType)
285{
286    OutputDescriptor *outputDesc;
287    audio_io_handle_t output;
288
289    if (streamType == DEFAULT) {
290        streamType = MUSIC;
291    }
292
293    output = getOutput((stream_type)streamType);
294    if (output == 0) {
295        return PERMISSION_DENIED;
296    }
297
298    gLock.lock();
299    outputDesc = AudioSystem::gOutputs.valueFor(output);
300    if (outputDesc == 0) {
301        gLock.unlock();
302        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
303        if (af == 0) return PERMISSION_DENIED;
304        *latency = af->latency(output);
305    } else {
306        *latency = outputDesc->latency;
307        gLock.unlock();
308    }
309
310    LOGV("getOutputLatency() streamType %d, output %d, latency %d", streamType, output, *latency);
311
312    return NO_ERROR;
313}
314
315status_t AudioSystem::getInputBufferSize(uint32_t sampleRate, int format, int channelCount,
316    size_t* buffSize)
317{
318    // Do we have a stale gInBufferSize or are we requesting the input buffer size for new values
319    if ((gInBuffSize == 0) || (sampleRate != gPrevInSamplingRate) || (format != gPrevInFormat)
320        || (channelCount != gPrevInChannelCount)) {
321        // save the request params
322        gPrevInSamplingRate = sampleRate;
323        gPrevInFormat = format;
324        gPrevInChannelCount = channelCount;
325
326        gInBuffSize = 0;
327        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
328        if (af == 0) {
329            return PERMISSION_DENIED;
330        }
331        gInBuffSize = af->getInputBufferSize(sampleRate, format, channelCount);
332    }
333    *buffSize = gInBuffSize;
334
335    return NO_ERROR;
336}
337
338status_t AudioSystem::setVoiceVolume(float value)
339{
340    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
341    if (af == 0) return PERMISSION_DENIED;
342    return af->setVoiceVolume(value);
343}
344
345status_t AudioSystem::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream)
346{
347    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
348    if (af == 0) return PERMISSION_DENIED;
349
350    if (stream == DEFAULT) {
351        stream = MUSIC;
352    }
353
354    return af->getRenderPosition(halFrames, dspFrames, getOutput((stream_type)stream));
355}
356
357unsigned int AudioSystem::getInputFramesLost(audio_io_handle_t ioHandle) {
358    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
359    unsigned int result = 0;
360    if (af == 0) return result;
361    if (ioHandle == 0) return result;
362
363    result = af->getInputFramesLost(ioHandle);
364    return result;
365}
366
367// ---------------------------------------------------------------------------
368
369void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) {
370    Mutex::Autolock _l(AudioSystem::gLock);
371
372    AudioSystem::gAudioFlinger.clear();
373    // clear output handles and stream to output map caches
374    AudioSystem::gStreamOutputMap.clear();
375    AudioSystem::gOutputs.clear();
376
377    if (gAudioErrorCallback) {
378        gAudioErrorCallback(DEAD_OBJECT);
379    }
380    LOGW("AudioFlinger server died!");
381}
382
383void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, int ioHandle, void *param2) {
384    LOGV("ioConfigChanged() event %d", event);
385    OutputDescriptor *desc;
386    uint32_t stream;
387
388    if (ioHandle == 0) return;
389
390    Mutex::Autolock _l(AudioSystem::gLock);
391
392    switch (event) {
393    case STREAM_CONFIG_CHANGED:
394        if (param2 == 0) break;
395        stream = *(uint32_t *)param2;
396        LOGV("ioConfigChanged() STREAM_CONFIG_CHANGED stream %d, output %d", stream, ioHandle);
397        if (gStreamOutputMap.indexOfKey(stream) >= 0) {
398            gStreamOutputMap.replaceValueFor(stream, ioHandle);
399        }
400        break;
401    case OUTPUT_OPENED: {
402        if (gOutputs.indexOfKey(ioHandle) >= 0) {
403            LOGV("ioConfigChanged() opening already existing output! %d", ioHandle);
404            break;
405        }
406        if (param2 == 0) break;
407        desc = (OutputDescriptor *)param2;
408
409        OutputDescriptor *outputDesc =  new OutputDescriptor(*desc);
410        gOutputs.add(ioHandle, outputDesc);
411        LOGV("ioConfigChanged() new output samplingRate %d, format %d channels %d frameCount %d latency %d",
412                outputDesc->samplingRate, outputDesc->format, outputDesc->channels, outputDesc->frameCount, outputDesc->latency);
413        } break;
414    case OUTPUT_CLOSED: {
415        if (gOutputs.indexOfKey(ioHandle) < 0) {
416            LOGW("ioConfigChanged() closing unknow output! %d", ioHandle);
417            break;
418        }
419        LOGV("ioConfigChanged() output %d closed", ioHandle);
420
421        gOutputs.removeItem(ioHandle);
422        for (int i = gStreamOutputMap.size() - 1; i >= 0 ; i--) {
423            if (gStreamOutputMap.valueAt(i) == ioHandle) {
424                gStreamOutputMap.removeItemsAt(i);
425            }
426        }
427        } break;
428
429    case OUTPUT_CONFIG_CHANGED: {
430        int index = gOutputs.indexOfKey(ioHandle);
431        if (index < 0) {
432            LOGW("ioConfigChanged() modifying unknow output! %d", ioHandle);
433            break;
434        }
435        if (param2 == 0) break;
436        desc = (OutputDescriptor *)param2;
437
438        LOGV("ioConfigChanged() new config for output %d samplingRate %d, format %d channels %d frameCount %d latency %d",
439                ioHandle, desc->samplingRate, desc->format,
440                desc->channels, desc->frameCount, desc->latency);
441        OutputDescriptor *outputDesc = gOutputs.valueAt(index);
442        delete outputDesc;
443        outputDesc =  new OutputDescriptor(*desc);
444        gOutputs.replaceValueFor(ioHandle, outputDesc);
445    } break;
446    case INPUT_OPENED:
447    case INPUT_CLOSED:
448    case INPUT_CONFIG_CHANGED:
449        break;
450
451    }
452}
453
454void AudioSystem::setErrorCallback(audio_error_callback cb) {
455    Mutex::Autolock _l(gLock);
456    gAudioErrorCallback = cb;
457}
458
459bool AudioSystem::routedToA2dpOutput(int streamType) {
460    switch(streamType) {
461    case MUSIC:
462    case VOICE_CALL:
463    case BLUETOOTH_SCO:
464    case SYSTEM:
465        return true;
466    default:
467        return false;
468    }
469}
470
471
472// client singleton for AudioPolicyService binder interface
473sp<IAudioPolicyService> AudioSystem::gAudioPolicyService;
474sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient;
475
476
477// establish binder interface to AudioFlinger service
478const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service()
479{
480    gLock.lock();
481    if (gAudioPolicyService.get() == 0) {
482        sp<IServiceManager> sm = defaultServiceManager();
483        sp<IBinder> binder;
484        do {
485            binder = sm->getService(String16("media.audio_policy"));
486            if (binder != 0)
487                break;
488            LOGW("AudioPolicyService not published, waiting...");
489            usleep(500000); // 0.5 s
490        } while(true);
491        if (gAudioPolicyServiceClient == NULL) {
492            gAudioPolicyServiceClient = new AudioPolicyServiceClient();
493        }
494        binder->linkToDeath(gAudioPolicyServiceClient);
495        gAudioPolicyService = interface_cast<IAudioPolicyService>(binder);
496        gLock.unlock();
497    } else {
498        gLock.unlock();
499    }
500    return gAudioPolicyService;
501}
502
503status_t AudioSystem::setDeviceConnectionState(audio_devices device,
504                                                  device_connection_state state,
505                                                  const char *device_address)
506{
507    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
508    if (aps == 0) return PERMISSION_DENIED;
509
510    return aps->setDeviceConnectionState(device, state, device_address);
511}
512
513AudioSystem::device_connection_state AudioSystem::getDeviceConnectionState(audio_devices device,
514                                                  const char *device_address)
515{
516    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
517    if (aps == 0) return DEVICE_STATE_UNAVAILABLE;
518
519    return aps->getDeviceConnectionState(device, device_address);
520}
521
522status_t AudioSystem::setPhoneState(int state)
523{
524    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
525    if (aps == 0) return PERMISSION_DENIED;
526
527    return aps->setPhoneState(state);
528}
529
530status_t AudioSystem::setRingerMode(uint32_t mode, uint32_t mask)
531{
532    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
533    if (aps == 0) return PERMISSION_DENIED;
534    return aps->setRingerMode(mode, mask);
535}
536
537status_t AudioSystem::setForceUse(force_use usage, forced_config config)
538{
539    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
540    if (aps == 0) return PERMISSION_DENIED;
541    return aps->setForceUse(usage, config);
542}
543
544AudioSystem::forced_config AudioSystem::getForceUse(force_use usage)
545{
546    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
547    if (aps == 0) return FORCE_NONE;
548    return aps->getForceUse(usage);
549}
550
551
552audio_io_handle_t AudioSystem::getOutput(stream_type stream,
553                                    uint32_t samplingRate,
554                                    uint32_t format,
555                                    uint32_t channels,
556                                    output_flags flags)
557{
558    audio_io_handle_t output = 0;
559    // Do not use stream to output map cache if the direct output
560    // flag is set or if we are likely to use a direct output
561    // (e.g voice call stream @ 8kHz could use BT SCO device and be routed to
562    // a direct output on some platforms).
563    // TODO: the output cache and stream to output mapping implementation needs to
564    // be reworked for proper operation with direct outputs. This code is too specific
565    // to the first use case we want to cover (Voice Recognition and Voice Dialer over
566    // Bluetooth SCO
567    if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0 &&
568        ((stream != AudioSystem::VOICE_CALL && stream != AudioSystem::BLUETOOTH_SCO) ||
569         channels != AudioSystem::CHANNEL_OUT_MONO ||
570         (samplingRate != 8000 && samplingRate != 16000))) {
571        Mutex::Autolock _l(gLock);
572        output = AudioSystem::gStreamOutputMap.valueFor(stream);
573        LOGV_IF((output != 0), "getOutput() read %d from cache for stream %d", output, stream);
574    }
575    if (output == 0) {
576        const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
577        if (aps == 0) return 0;
578        output = aps->getOutput(stream, samplingRate, format, channels, flags);
579        if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) {
580            Mutex::Autolock _l(gLock);
581            AudioSystem::gStreamOutputMap.add(stream, output);
582        }
583    }
584    return output;
585}
586
587status_t AudioSystem::startOutput(audio_io_handle_t output, AudioSystem::stream_type stream)
588{
589    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
590    if (aps == 0) return PERMISSION_DENIED;
591    return aps->startOutput(output, stream);
592}
593
594status_t AudioSystem::stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream)
595{
596    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
597    if (aps == 0) return PERMISSION_DENIED;
598    return aps->stopOutput(output, stream);
599}
600
601void AudioSystem::releaseOutput(audio_io_handle_t output)
602{
603    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
604    if (aps == 0) return;
605    aps->releaseOutput(output);
606}
607
608audio_io_handle_t AudioSystem::getInput(int inputSource,
609                                    uint32_t samplingRate,
610                                    uint32_t format,
611                                    uint32_t channels,
612                                    audio_in_acoustics acoustics)
613{
614    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
615    if (aps == 0) return 0;
616    return aps->getInput(inputSource, samplingRate, format, channels, acoustics);
617}
618
619status_t AudioSystem::startInput(audio_io_handle_t input)
620{
621    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
622    if (aps == 0) return PERMISSION_DENIED;
623    return aps->startInput(input);
624}
625
626status_t AudioSystem::stopInput(audio_io_handle_t input)
627{
628    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
629    if (aps == 0) return PERMISSION_DENIED;
630    return aps->stopInput(input);
631}
632
633void AudioSystem::releaseInput(audio_io_handle_t input)
634{
635    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
636    if (aps == 0) return;
637    aps->releaseInput(input);
638}
639
640status_t AudioSystem::initStreamVolume(stream_type stream,
641                                    int indexMin,
642                                    int indexMax)
643{
644    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
645    if (aps == 0) return PERMISSION_DENIED;
646    return aps->initStreamVolume(stream, indexMin, indexMax);
647}
648
649status_t AudioSystem::setStreamVolumeIndex(stream_type stream, int index)
650{
651    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
652    if (aps == 0) return PERMISSION_DENIED;
653    return aps->setStreamVolumeIndex(stream, index);
654}
655
656status_t AudioSystem::getStreamVolumeIndex(stream_type stream, int *index)
657{
658    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
659    if (aps == 0) return PERMISSION_DENIED;
660    return aps->getStreamVolumeIndex(stream, index);
661}
662
663// ---------------------------------------------------------------------------
664
665void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) {
666    Mutex::Autolock _l(AudioSystem::gLock);
667    AudioSystem::gAudioPolicyService.clear();
668
669    LOGW("AudioPolicyService server died!");
670}
671
672// ---------------------------------------------------------------------------
673
674
675// use emulated popcount optimization
676// http://www.df.lth.se/~john_e/gems/gem002d.html
677uint32_t AudioSystem::popCount(uint32_t u)
678{
679    u = ((u&0x55555555) + ((u>>1)&0x55555555));
680    u = ((u&0x33333333) + ((u>>2)&0x33333333));
681    u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
682    u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
683    u = ( u&0x0000ffff) + (u>>16);
684    return u;
685}
686
687bool AudioSystem::isOutputDevice(audio_devices device)
688{
689    if ((popCount(device) == 1 ) &&
690        ((device & ~AudioSystem::DEVICE_OUT_ALL) == 0)) {
691        return true;
692    } else {
693        return false;
694    }
695}
696
697bool AudioSystem::isInputDevice(audio_devices device)
698{
699    if ((popCount(device) == 1 ) &&
700        ((device & ~AudioSystem::DEVICE_IN_ALL) == 0)) {
701        return true;
702    } else {
703        return false;
704    }
705}
706
707bool AudioSystem::isA2dpDevice(audio_devices device)
708{
709    if ((popCount(device) == 1 ) &&
710        (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP |
711                   AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
712                   AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER))) {
713        return true;
714    } else {
715        return false;
716    }
717}
718
719bool AudioSystem::isBluetoothScoDevice(audio_devices device)
720{
721    if ((popCount(device) == 1 ) &&
722        (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_SCO |
723                   AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET |
724                   AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT |
725                   AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET))) {
726        return true;
727    } else {
728        return false;
729    }
730}
731
732bool AudioSystem::isLowVisibility(stream_type stream)
733{
734    if (stream == AudioSystem::SYSTEM ||
735        stream == AudioSystem::NOTIFICATION ||
736        stream == AudioSystem::RING) {
737        return true;
738    } else {
739        return false;
740    }
741}
742
743bool AudioSystem::isInputChannel(uint32_t channel)
744{
745    if ((channel & ~AudioSystem::CHANNEL_IN_ALL) == 0) {
746        return true;
747    } else {
748        return false;
749    }
750}
751
752bool AudioSystem::isOutputChannel(uint32_t channel)
753{
754    if ((channel & ~AudioSystem::CHANNEL_OUT_ALL) == 0) {
755        return true;
756    } else {
757        return false;
758    }
759}
760
761bool AudioSystem::isValidFormat(uint32_t format)
762{
763    switch (format & MAIN_FORMAT_MASK) {
764    case         PCM:
765    case         MP3:
766    case         AMR_NB:
767    case         AMR_WB:
768    case         AAC:
769    case         HE_AAC_V1:
770    case         HE_AAC_V2:
771    case         VORBIS:
772        return true;
773    default:
774        return false;
775    }
776}
777
778bool AudioSystem::isLinearPCM(uint32_t format)
779{
780    switch (format) {
781    case         PCM_16_BIT:
782    case         PCM_8_BIT:
783        return true;
784    default:
785        return false;
786    }
787}
788
789//------------------------- AudioParameter class implementation ---------------
790
791const char *AudioParameter::keyRouting = "routing";
792const char *AudioParameter::keySamplingRate = "sampling_rate";
793const char *AudioParameter::keyFormat = "format";
794const char *AudioParameter::keyChannels = "channels";
795const char *AudioParameter::keyFrameCount = "frame_count";
796
797AudioParameter::AudioParameter(const String8& keyValuePairs)
798{
799    char *str = new char[keyValuePairs.length()+1];
800    mKeyValuePairs = keyValuePairs;
801
802    strcpy(str, keyValuePairs.string());
803    char *pair = strtok(str, ";");
804    while (pair != NULL) {
805        if (strlen(pair) != 0) {
806            size_t eqIdx = strcspn(pair, "=");
807            String8 key = String8(pair, eqIdx);
808            String8 value;
809            if (eqIdx == strlen(pair)) {
810                value = String8("");
811            } else {
812                value = String8(pair + eqIdx + 1);
813            }
814            if (mParameters.indexOfKey(key) < 0) {
815                mParameters.add(key, value);
816            } else {
817                mParameters.replaceValueFor(key, value);
818            }
819        } else {
820            LOGV("AudioParameter() cstor empty key value pair");
821        }
822        pair = strtok(NULL, ";");
823    }
824
825    delete[] str;
826}
827
828AudioParameter::~AudioParameter()
829{
830    mParameters.clear();
831}
832
833String8 AudioParameter::toString()
834{
835    String8 str = String8("");
836
837    size_t size = mParameters.size();
838    for (size_t i = 0; i < size; i++) {
839        str += mParameters.keyAt(i);
840        str += "=";
841        str += mParameters.valueAt(i);
842        if (i < (size - 1)) str += ";";
843    }
844    return str;
845}
846
847status_t AudioParameter::add(const String8& key, const String8& value)
848{
849    if (mParameters.indexOfKey(key) < 0) {
850        mParameters.add(key, value);
851        return NO_ERROR;
852    } else {
853        mParameters.replaceValueFor(key, value);
854        return ALREADY_EXISTS;
855    }
856}
857
858status_t AudioParameter::addInt(const String8& key, const int value)
859{
860    char str[12];
861    if (snprintf(str, 12, "%d", value) > 0) {
862        String8 str8 = String8(str);
863        return add(key, str8);
864    } else {
865        return BAD_VALUE;
866    }
867}
868
869status_t AudioParameter::addFloat(const String8& key, const float value)
870{
871    char str[23];
872    if (snprintf(str, 23, "%.10f", value) > 0) {
873        String8 str8 = String8(str);
874        return add(key, str8);
875    } else {
876        return BAD_VALUE;
877    }
878}
879
880status_t AudioParameter::remove(const String8& key)
881{
882    if (mParameters.indexOfKey(key) >= 0) {
883        mParameters.removeItem(key);
884        return NO_ERROR;
885    } else {
886        return BAD_VALUE;
887    }
888}
889
890status_t AudioParameter::get(const String8& key, String8& value)
891{
892    if (mParameters.indexOfKey(key) >= 0) {
893        value = mParameters.valueFor(key);
894        return NO_ERROR;
895    } else {
896        return BAD_VALUE;
897    }
898}
899
900status_t AudioParameter::getInt(const String8& key, int& value)
901{
902    String8 str8;
903    status_t result = get(key, str8);
904    value = 0;
905    if (result == NO_ERROR) {
906        int val;
907        if (sscanf(str8.string(), "%d", &val) == 1) {
908            value = val;
909        } else {
910            result = INVALID_OPERATION;
911        }
912    }
913    return result;
914}
915
916status_t AudioParameter::getFloat(const String8& key, float& value)
917{
918    String8 str8;
919    status_t result = get(key, str8);
920    value = 0;
921    if (result == NO_ERROR) {
922        float val;
923        if (sscanf(str8.string(), "%f", &val) == 1) {
924            value = val;
925        } else {
926            result = INVALID_OPERATION;
927        }
928    }
929    return result;
930}
931
932status_t AudioParameter::getAt(size_t index, String8& key, String8& value)
933{
934    if (mParameters.size() > index) {
935        key = mParameters.keyAt(index);
936        value = mParameters.valueAt(index);
937        return NO_ERROR;
938    } else {
939        return BAD_VALUE;
940    }
941}
942}; // namespace android
943
944