AudioSystem.cpp revision df49e8926e85088bc7d1dc7905362437c9806b69 
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
357// ---------------------------------------------------------------------------
358
359void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) {
360    Mutex::Autolock _l(AudioSystem::gLock);
361
362    AudioSystem::gAudioFlinger.clear();
363    // clear output handles and stream to output map caches
364    AudioSystem::gStreamOutputMap.clear();
365    AudioSystem::gOutputs.clear();
366
367    if (gAudioErrorCallback) {
368        gAudioErrorCallback(DEAD_OBJECT);
369    }
370    LOGW("AudioFlinger server died!");
371}
372
373void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, int ioHandle, void *param2) {
374    LOGV("ioConfigChanged() event %d", event);
375    OutputDescriptor *desc;
376    uint32_t stream;
377
378    if (ioHandle == 0) return;
379
380    Mutex::Autolock _l(AudioSystem::gLock);
381
382    switch (event) {
383    case STREAM_CONFIG_CHANGED:
384        if (param2 == 0) break;
385        stream = *(uint32_t *)param2;
386        LOGV("ioConfigChanged() STREAM_CONFIG_CHANGED stream %d, output %d", stream, ioHandle);
387        if (gStreamOutputMap.indexOfKey(stream) >= 0) {
388            gStreamOutputMap.replaceValueFor(stream, ioHandle);
389        }
390        break;
391    case OUTPUT_OPENED: {
392        if (gOutputs.indexOfKey(ioHandle) >= 0) {
393            LOGV("ioConfigChanged() opening already existing output! %d", ioHandle);
394            break;
395        }
396        if (param2 == 0) break;
397        desc = (OutputDescriptor *)param2;
398
399        OutputDescriptor *outputDesc =  new OutputDescriptor(*desc);
400        gOutputs.add(ioHandle, outputDesc);
401        LOGV("ioConfigChanged() new output samplingRate %d, format %d channels %d frameCount %d latency %d",
402                outputDesc->samplingRate, outputDesc->format, outputDesc->channels, outputDesc->frameCount, outputDesc->latency);
403        } break;
404    case OUTPUT_CLOSED: {
405        if (gOutputs.indexOfKey(ioHandle) < 0) {
406            LOGW("ioConfigChanged() closing unknow output! %d", ioHandle);
407            break;
408        }
409        LOGV("ioConfigChanged() output %d closed", ioHandle);
410
411        gOutputs.removeItem(ioHandle);
412        for (int i = gStreamOutputMap.size() - 1; i >= 0 ; i--) {
413            if (gStreamOutputMap.valueAt(i) == ioHandle) {
414                gStreamOutputMap.removeItemsAt(i);
415            }
416        }
417        } break;
418
419    case OUTPUT_CONFIG_CHANGED: {
420        int index = gOutputs.indexOfKey(ioHandle);
421        if (index < 0) {
422            LOGW("ioConfigChanged() modifying unknow output! %d", ioHandle);
423            break;
424        }
425        if (param2 == 0) break;
426        desc = (OutputDescriptor *)param2;
427
428        LOGV("ioConfigChanged() new config for output %d samplingRate %d, format %d channels %d frameCount %d latency %d",
429                ioHandle, desc->samplingRate, desc->format,
430                desc->channels, desc->frameCount, desc->latency);
431        OutputDescriptor *outputDesc = gOutputs.valueAt(index);
432        delete outputDesc;
433        outputDesc =  new OutputDescriptor(*desc);
434        gOutputs.replaceValueFor(ioHandle, outputDesc);
435    } break;
436    case INPUT_OPENED:
437    case INPUT_CLOSED:
438    case INPUT_CONFIG_CHANGED:
439        break;
440
441    }
442}
443
444void AudioSystem::setErrorCallback(audio_error_callback cb) {
445    Mutex::Autolock _l(gLock);
446    gAudioErrorCallback = cb;
447}
448
449bool AudioSystem::routedToA2dpOutput(int streamType) {
450    switch(streamType) {
451    case MUSIC:
452    case VOICE_CALL:
453    case BLUETOOTH_SCO:
454    case SYSTEM:
455        return true;
456    default:
457        return false;
458    }
459}
460
461
462// client singleton for AudioPolicyService binder interface
463sp<IAudioPolicyService> AudioSystem::gAudioPolicyService;
464sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient;
465
466
467// establish binder interface to AudioFlinger service
468const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service()
469{
470    gLock.lock();
471    if (gAudioPolicyService.get() == 0) {
472        sp<IServiceManager> sm = defaultServiceManager();
473        sp<IBinder> binder;
474        do {
475            binder = sm->getService(String16("media.audio_policy"));
476            if (binder != 0)
477                break;
478            LOGW("AudioPolicyService not published, waiting...");
479            usleep(500000); // 0.5 s
480        } while(true);
481        if (gAudioPolicyServiceClient == NULL) {
482            gAudioPolicyServiceClient = new AudioPolicyServiceClient();
483        }
484        binder->linkToDeath(gAudioPolicyServiceClient);
485        gAudioPolicyService = interface_cast<IAudioPolicyService>(binder);
486        gLock.unlock();
487    } else {
488        gLock.unlock();
489    }
490    return gAudioPolicyService;
491}
492
493status_t AudioSystem::setDeviceConnectionState(audio_devices device,
494                                                  device_connection_state state,
495                                                  const char *device_address)
496{
497    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
498    if (aps == 0) return PERMISSION_DENIED;
499
500    return aps->setDeviceConnectionState(device, state, device_address);
501}
502
503AudioSystem::device_connection_state AudioSystem::getDeviceConnectionState(audio_devices device,
504                                                  const char *device_address)
505{
506    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
507    if (aps == 0) return DEVICE_STATE_UNAVAILABLE;
508
509    return aps->getDeviceConnectionState(device, device_address);
510}
511
512status_t AudioSystem::setPhoneState(int state)
513{
514    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
515    if (aps == 0) return PERMISSION_DENIED;
516
517    return aps->setPhoneState(state);
518}
519
520status_t AudioSystem::setRingerMode(uint32_t mode, uint32_t mask)
521{
522    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
523    if (aps == 0) return PERMISSION_DENIED;
524    return aps->setRingerMode(mode, mask);
525}
526
527status_t AudioSystem::setForceUse(force_use usage, forced_config config)
528{
529    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
530    if (aps == 0) return PERMISSION_DENIED;
531    return aps->setForceUse(usage, config);
532}
533
534AudioSystem::forced_config AudioSystem::getForceUse(force_use usage)
535{
536    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
537    if (aps == 0) return FORCE_NONE;
538    return aps->getForceUse(usage);
539}
540
541
542audio_io_handle_t AudioSystem::getOutput(stream_type stream,
543                                    uint32_t samplingRate,
544                                    uint32_t format,
545                                    uint32_t channels,
546                                    output_flags flags)
547{
548    audio_io_handle_t output = 0;
549    if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) {
550        Mutex::Autolock _l(gLock);
551        output = AudioSystem::gStreamOutputMap.valueFor(stream);
552        LOGV_IF((output != 0), "getOutput() read %d from cache for stream %d", output, stream);
553    }
554    if (output == 0) {
555        const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
556        if (aps == 0) return 0;
557        output = aps->getOutput(stream, samplingRate, format, channels, flags);
558        if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) {
559            Mutex::Autolock _l(gLock);
560            AudioSystem::gStreamOutputMap.add(stream, output);
561        }
562    }
563    return output;
564}
565
566status_t AudioSystem::startOutput(audio_io_handle_t output, AudioSystem::stream_type stream)
567{
568    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
569    if (aps == 0) return PERMISSION_DENIED;
570    return aps->startOutput(output, stream);
571}
572
573status_t AudioSystem::stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream)
574{
575    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
576    if (aps == 0) return PERMISSION_DENIED;
577    return aps->stopOutput(output, stream);
578}
579
580void AudioSystem::releaseOutput(audio_io_handle_t output)
581{
582    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
583    if (aps == 0) return;
584    aps->releaseOutput(output);
585}
586
587audio_io_handle_t AudioSystem::getInput(int inputSource,
588                                    uint32_t samplingRate,
589                                    uint32_t format,
590                                    uint32_t channels,
591                                    audio_in_acoustics acoustics)
592{
593    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
594    if (aps == 0) return 0;
595    return aps->getInput(inputSource, samplingRate, format, channels, acoustics);
596}
597
598status_t AudioSystem::startInput(audio_io_handle_t input)
599{
600    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
601    if (aps == 0) return PERMISSION_DENIED;
602    return aps->startInput(input);
603}
604
605status_t AudioSystem::stopInput(audio_io_handle_t input)
606{
607    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
608    if (aps == 0) return PERMISSION_DENIED;
609    return aps->stopInput(input);
610}
611
612void AudioSystem::releaseInput(audio_io_handle_t input)
613{
614    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
615    if (aps == 0) return;
616    aps->releaseInput(input);
617}
618
619status_t AudioSystem::initStreamVolume(stream_type stream,
620                                    int indexMin,
621                                    int indexMax)
622{
623    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
624    if (aps == 0) return PERMISSION_DENIED;
625    return aps->initStreamVolume(stream, indexMin, indexMax);
626}
627
628status_t AudioSystem::setStreamVolumeIndex(stream_type stream, int index)
629{
630    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
631    if (aps == 0) return PERMISSION_DENIED;
632    return aps->setStreamVolumeIndex(stream, index);
633}
634
635status_t AudioSystem::getStreamVolumeIndex(stream_type stream, int *index)
636{
637    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
638    if (aps == 0) return PERMISSION_DENIED;
639    return aps->getStreamVolumeIndex(stream, index);
640}
641
642// ---------------------------------------------------------------------------
643
644void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) {
645    Mutex::Autolock _l(AudioSystem::gLock);
646    AudioSystem::gAudioPolicyService.clear();
647
648    LOGW("AudioPolicyService server died!");
649}
650
651// ---------------------------------------------------------------------------
652
653
654// use emulated popcount optimization
655// http://www.df.lth.se/~john_e/gems/gem002d.html
656uint32_t AudioSystem::popCount(uint32_t u)
657{
658    u = ((u&0x55555555) + ((u>>1)&0x55555555));
659    u = ((u&0x33333333) + ((u>>2)&0x33333333));
660    u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
661    u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
662    u = ( u&0x0000ffff) + (u>>16);
663    return u;
664}
665
666bool AudioSystem::isOutputDevice(audio_devices device)
667{
668    if ((popCount(device) == 1 ) &&
669        ((device & ~AudioSystem::DEVICE_OUT_ALL) == 0)) {
670        return true;
671    } else {
672        return false;
673    }
674}
675
676bool AudioSystem::isInputDevice(audio_devices device)
677{
678    if ((popCount(device) == 1 ) &&
679        ((device & ~AudioSystem::DEVICE_IN_ALL) == 0)) {
680        return true;
681    } else {
682        return false;
683    }
684}
685
686bool AudioSystem::isA2dpDevice(audio_devices device)
687{
688    if ((popCount(device) == 1 ) &&
689        (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP |
690                   AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
691                   AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER))) {
692        return true;
693    } else {
694        return false;
695    }
696}
697
698bool AudioSystem::isBluetoothScoDevice(audio_devices device)
699{
700    if ((popCount(device) == 1 ) &&
701        (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_SCO |
702                   AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET |
703                   AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT))) {
704        return true;
705    } else {
706        return false;
707    }
708}
709
710bool AudioSystem::isLowVisibility(stream_type stream)
711{
712    if (stream == AudioSystem::SYSTEM ||
713        stream == AudioSystem::NOTIFICATION ||
714        stream == AudioSystem::RING) {
715        return true;
716    } else {
717        return false;
718    }
719}
720
721bool AudioSystem::isInputChannel(uint32_t channel)
722{
723    if ((channel & ~AudioSystem::CHANNEL_IN_ALL) == 0) {
724        return true;
725    } else {
726        return false;
727    }
728}
729
730bool AudioSystem::isOutputChannel(uint32_t channel)
731{
732    if ((channel & ~AudioSystem::CHANNEL_OUT_ALL) == 0) {
733        return true;
734    } else {
735        return false;
736    }
737}
738
739bool AudioSystem::isValidFormat(uint32_t format)
740{
741    switch (format & MAIN_FORMAT_MASK) {
742    case         PCM:
743    case         MP3:
744    case         AMR_NB:
745    case         AMR_WB:
746    case         AAC:
747    case         HE_AAC_V1:
748    case         HE_AAC_V2:
749    case         VORBIS:
750        return true;
751    default:
752        return false;
753    }
754}
755
756bool AudioSystem::isLinearPCM(uint32_t format)
757{
758    switch (format) {
759    case         PCM_16_BIT:
760    case         PCM_8_BIT:
761        return true;
762    default:
763        return false;
764    }
765}
766
767//------------------------- AudioParameter class implementation ---------------
768
769const char *AudioParameter::keyRouting = "routing";
770const char *AudioParameter::keySamplingRate = "sampling_rate";
771const char *AudioParameter::keyFormat = "format";
772const char *AudioParameter::keyChannels = "channels";
773const char *AudioParameter::keyFrameCount = "frame_count";
774
775AudioParameter::AudioParameter(const String8& keyValuePairs)
776{
777    char *str = new char[keyValuePairs.length()+1];
778    mKeyValuePairs = keyValuePairs;
779
780    strcpy(str, keyValuePairs.string());
781    char *pair = strtok(str, ";");
782    while (pair != NULL) {
783        if (strlen(pair) != 0) {
784            size_t eqIdx = strcspn(pair, "=");
785            String8 key = String8(pair, eqIdx);
786            String8 value;
787            if (eqIdx == strlen(pair)) {
788                value = String8("");
789            } else {
790                value = String8(pair + eqIdx + 1);
791            }
792            if (mParameters.indexOfKey(key) < 0) {
793                mParameters.add(key, value);
794            } else {
795                mParameters.replaceValueFor(key, value);
796            }
797        } else {
798            LOGV("AudioParameter() cstor empty key value pair");
799        }
800        pair = strtok(NULL, ";");
801    }
802
803    delete[] str;
804}
805
806AudioParameter::~AudioParameter()
807{
808    mParameters.clear();
809}
810
811String8 AudioParameter::toString()
812{
813    String8 str = String8("");
814
815    size_t size = mParameters.size();
816    for (size_t i = 0; i < size; i++) {
817        str += mParameters.keyAt(i);
818        str += "=";
819        str += mParameters.valueAt(i);
820        if (i < (size - 1)) str += ";";
821    }
822    return str;
823}
824
825status_t AudioParameter::add(const String8& key, const String8& value)
826{
827    if (mParameters.indexOfKey(key) < 0) {
828        mParameters.add(key, value);
829        return NO_ERROR;
830    } else {
831        mParameters.replaceValueFor(key, value);
832        return ALREADY_EXISTS;
833    }
834}
835
836status_t AudioParameter::addInt(const String8& key, const int value)
837{
838    char str[12];
839    if (snprintf(str, 12, "%d", value) > 0) {
840        String8 str8 = String8(str);
841        return add(key, str8);
842    } else {
843        return BAD_VALUE;
844    }
845}
846
847status_t AudioParameter::addFloat(const String8& key, const float value)
848{
849    char str[23];
850    if (snprintf(str, 23, "%.10f", value) > 0) {
851        String8 str8 = String8(str);
852        return add(key, str8);
853    } else {
854        return BAD_VALUE;
855    }
856}
857
858status_t AudioParameter::remove(const String8& key)
859{
860    if (mParameters.indexOfKey(key) >= 0) {
861        mParameters.removeItem(key);
862        return NO_ERROR;
863    } else {
864        return BAD_VALUE;
865    }
866}
867
868status_t AudioParameter::get(const String8& key, String8& value)
869{
870    if (mParameters.indexOfKey(key) >= 0) {
871        value = mParameters.valueFor(key);
872        return NO_ERROR;
873    } else {
874        return BAD_VALUE;
875    }
876}
877
878status_t AudioParameter::getInt(const String8& key, int& value)
879{
880    String8 str8;
881    status_t result = get(key, str8);
882    value = 0;
883    if (result == NO_ERROR) {
884        int val;
885        if (sscanf(str8.string(), "%d", &val) == 1) {
886            value = val;
887        } else {
888            result = INVALID_OPERATION;
889        }
890    }
891    return result;
892}
893
894status_t AudioParameter::getFloat(const String8& key, float& value)
895{
896    String8 str8;
897    status_t result = get(key, str8);
898    value = 0;
899    if (result == NO_ERROR) {
900        float val;
901        if (sscanf(str8.string(), "%f", &val) == 1) {
902            value = val;
903        } else {
904            result = INVALID_OPERATION;
905        }
906    }
907    return result;
908}
909
910status_t AudioParameter::getAt(size_t index, String8& key, String8& value)
911{
912    if (mParameters.size() > index) {
913        key = mParameters.keyAt(index);
914        value = mParameters.valueAt(index);
915        return NO_ERROR;
916    } else {
917        return BAD_VALUE;
918    }
919}
920}; // namespace android
921
922