Android7.1 Audio Debug相关方法

1. Audio的FW和HAL层dump PCM数据(非offload的场景，对应offload，dump出来的还是原数据)

1.抓取Systrace<1>怎么加参考：frameworks/av/services/audioflinger/Threads.cpp#define ATRACE_TAG ATRACE_TAG_AUDIOATRACE_BEGIN("write");//代码。。。ATRACE_END();<2>怎么使用Systrace参考：https://maoao530.github.io/2017/02/06/systrace/
2.混音之前dump PCM数据frameworks/av/media/libmedia/AudioTrack.cpp#include <fcntl.h>nsecs_t AudioTrack::processAudioBuffer(){{//add beginint tmpFd =::open("/data/local/test/dumpAudioTrack.pcm", O_CREAT | O_WRONLY | O_APPEND , 0777);if(tmpFd < 0){ALOGE("Fail to open dumpTrack file");}else{::write(tmpFd, audioBuffer.raw, audioBuffer.frameCount * 2/* ChannelCount*/ * 2); //第1个2：双声道 1:单声道::close(tmpFd);}}//add endreleaseBuffer(&audioBuffer);}
3、混音之后dump PCM数据frameworks/av/services/audioflinger/Tracks.cpp#include <fcntl.h>status_t AudioFlinger::PlaybackThread::Track::getNextBuffer(AudioBufferProvider::Buffer* buffer, int64_t pts __unused){{//add beginint tmpFd =::open("/data/local/test/dumpTracks.pcm", O_CREAT | O_WRONLY | O_APPEND , 0777);if(tmpFd < 0){ALOGE("Fail to open dumpTrack file");}else{::write(tmpFd, audioBuffer.raw, audioBuffer.size); }}//add endreturn status;}
注意：以上只是抓的AudioTrack播放的，AudioRecord录音的也是在nsecs_t AudioRecord::processAudioBuffer()里抓pcm录音数据。4、HAL层dump数据hardware/xxx平台/audio/tinyalsa_hal/audio_hw.c//dump PCM数据函数
<1>static void dump_out_data(const void* buffer,size_t bytes, int *size){ALOGD("dump pcm file.");static FILE* fd;static int offset = 0;if(fd == NULL) {fd=fopen("/data/local/test/dumpaudio_hw.pcm","wb+");if(fd == NULL) {ALOGD("DEBUG open /data/debug.pcm error =%d ,errno = %d",fd,errno);offset = 0;}}fwrite(buffer,bytes,1,fd);offset += bytes;fflush(fd);if(offset >= (500*1024*1024))/*大于500M停止写入*/ {*size = 0;fclose(fd);offset = 0;system("setprop media.audio.record 0");ALOGD("TEST playback pcmfile end");}}
<2>添加位置
static ssize_t out_write(struct audio_stream_out *stream, const void* buffer, size_t bytes){//add begindump_out_data(buffer, bytes, &prop_pcm);//add endchar value[PROPERTY_VALUE_MAX];property_get("media.audio.debug",value, NULL);
}

2. 如何获取当前GenericSource选中的媒体抽取器的类型(mp3,aac等)

dumpsys media.extractor

Recent extractors, most recent first:MP3Extractor for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/data/app/com.sunmi.audio-1/base.apk), 1186524, 9423124)))), pid 750: deletedtrack {srte: (int32_t) 44100, mime: (char*) audio/mpeg, encp: (int32_t) 1236, encd: (int32_t) 576, dura: (int64_t) 235546122, brte: (int32_t) 320000, #chn: (int32_t) 2} : active<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/KeypressInvalid.ogg), 0, 9847)))), pid 1556: activetrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 114), vboo: (unknown type 0, size 4038), srte: (int32_t) 44100, mxBr: (int32_t) 0, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 182000, brte: (int32_t) 239920, #chn: (int32_t) 1} : active<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/KeypressReturn.ogg), 0, 6246)))), pid 1556: deletedtrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 3920), srte: (int32_t) 48000, mxBr: (int32_t) -1, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 108000, brte: (int32_t) 140000, #chn: (int32_t) 1} : deleted<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/KeypressDelete.ogg), 0, 5832)))), pid 1556: deletedtrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 3920), srte: (int32_t) 48000, mxBr: (int32_t) -1, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 108000, brte: (int32_t) 140000, #chn: (int32_t) 1} : deleted<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/Trusted.ogg), 0, 5713)))), pid 1881: activetrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 4225), srte: (int32_t) 48000, mxBr: (int32_t) 0, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 80000, brte: (int32_t) 160000, #chn: (int32_t) 2} : active<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/KeypressSpacebar.ogg), 0, 5952)))), pid 1556: deletedtrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 3920), srte: (int32_t) 48000, mxBr: (int32_t) -1, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 108000, brte: (int32_t) 140000, #chn: (int32_t) 1} : deleted<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/Unlock.ogg), 0, 7853)))), pid 1881: deletedtrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 4225), srte: (int32_t) 44100, mxBr: (int32_t) -1, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 188000, brte: (int32_t) 160000, #chn: (int32_t) 2} : deleted<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/KeypressStandard.ogg), 0, 5837)))), pid 1556: deletedtrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 3920), srte: (int32_t) 48000, mxBr: (int32_t) -1, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 108000, brte: (int32_t) 140000, #chn: (int32_t) 1} : deleted<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/Lock.ogg), 0, 8308)))), pid 1881: deletedtrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 4225), srte: (int32_t) 44100, mxBr: (int32_t) -1, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 226000, brte: (int32_t) 160000, #chn: (int32_t) 2} : deleted<unspecified> for mime NULL, source TinyCacheSource(CallbackDataSource(RemoteDataSource(FileSource(fd(/system/media/audio/ui/Effect_Tick.ogg), 0, 5136)))), pid 1556: deletedtrack {vinf: (unknown type 0, size 30), vdat: (unknown type 0, size 45), vboo: (unknown type 0, size 3796), srte: (int32_t) 48000, mxBr: (int32_t) 0, mime: (char*) audio/vorbis, lang: (char*) , inpS: (int32_t) 65307, ffmt: (char*) application/ogg, dura: (int64_t) 94000, brte: (int32_t) 96000, #chn: (int32_t) 2} : deleted

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