android 录制系统内置声音 android remote submix audio.r_submix.default.so

核心模块：

/system/lib/hw/audio.r_submix.default.so    hardware/libhardware/modules/audio_remote_submix

核心关键词 remote submix

我将audio.r_submix.default.so  没有重命名的时候，APK能够正常录制，但重命名之后，再重启设置，APK启动就出错了

W/AudioPolicyManager(  171): getInput() could not find device for inputSource 8

E/AudioRecord( 2439): Could not get audio input for record source 8, sample rate 44100, format 0x1, channel mask 0xc, session 13, flags 0

E/AudioRecord-JNI( 2439): Error creating AudioRecord instance: initialization check failed with status -22.

E/android.media.AudioRecord( 2439): Error code -20 when initializing native AudioRecord object.

D/OpenGLRenderer( 2439): Render dirty regions requested: true

--------- beginning of crash

E/AndroidRuntime( 2439): FATAL EXCEPTION: Thread-284

E/AndroidRuntime( 2439): Process: com.hp.androidremotesubmix, PID: 2439

E/AndroidRuntime( 2439): java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord.

E/AndroidRuntime( 2439):     at android.media.AudioRecord.startRecording(AudioRecord.java:603)

E/AndroidRuntime( 2439):     at com.hp.androidremotesubmix.MainActivity.recordAndPlay(MainActivity.java:49)

E/AndroidRuntime( 2439):     at com.hp.androidremotesubmix.MainActivity.access$0(MainActivity.java:47)

E/AndroidRuntime( 2439):     at com.hp.androidremotesubmix.MainActivity$1.run(MainActivity.java:28)

 

正常的log

I/ActivityManager(  462): Start proc com.hp.androidremotesubmix for activity com.hp.androidremotesubmix/.MainActivity: pid=3731 uid=10127 gids={50127, 9997, 1028, 1015, 1023} abi=armeabi-v7a

D/r_submix(  170): adev_open_input_stream()

D/r_submix(  170): submix_audio_device_create_pipe()

I/AudioFlinger(  170): AudioFlinger's thread 0xb4a98008 ready to run

I/r_submix(  170): in_standby()

I/r_submix(  170): in_standby()

D/r_submix(  170): adev_open_output_stream()

D/r_submix(  170): submix_audio_device_create_pipe()

I/AudioFlinger(  170): HAL output buffer size 2048 frames, normal sink buffer size 2048 frames

I/AudioFlinger(  170): AudioFlinger's thread 0xb1841008 ready to run

I/r_submix(  170): out_standby()

I/AudioFlinger(  170): HAL output buffer size 2048 frames, normal sink buffer size 2048 frames

I/AudioFlinger(  170): AudioFlinger's thread 0xb1702008 ready to run

D/OpenGLRenderer( 3731): Render dirty regions requested: true

D/Atlas   ( 3731): Validating map...

W/AudioTrack(  170): dead IAudioTrack, PCM, creating a new one from obtainBuffer()

W/Atlas   ( 3731): Pointer 0x0, not in getPreloadedDrawables?

W/Atlas   ( 3731): Pointer 0x0, not in getPreloadedDrawables?

W/Atlas   ( 3731): Pointer 0x0, not in getPreloadedDrawables?

E/AudioTrack(  170): detected illegal retrograde motion by the server: mServer advanced by –1381094

【关闭，退出】

E/audio_a2dp_hw(  170): adev_set_parameters: ERROR: set param called even when stream out is null

W/AudioTrack(  170): dead IAudioTrack, PCM, creating a new one from obtainBuffer()

W/AudioSystem(  170): ioConfigChanged() closing unknown output! 29

D/r_submix(  170): out_set_parameters(): shutting down MonoPipe sink

I/r_submix(  170): in_standby()

W/AudioSystem(  170): ioConfigChanged() closing unknown output! 28

D/r_submix(  170): out_set_parameters(): shutting down MonoPipe sink

I/r_submix(  170): out_standby()

D/r_submix(  170): adev_close_output_stream()

E/AudioTrack(  170): detected illegal retrograde motion by the server: mServer advanced by -2841216

W/AudioPolicyManager(  170): releaseOutput() releasing unknown output 28

D/r_submix(  170): adev_close_input_stream()

D/r_submix(  170): submix_audio_device_release_pipe()

D/r_submix(  170): submix_audio_device_destroy_pipe(): pipe destroyed

【切换MIC播放】

D/AudioHardware(  170): AudioHardware pcm playback is exiting standby.

D/AudioHardware(  170): openPcmOut_l() mPcmOpenCnt: 0

D/alsa_route(  170): route_info->sound_card 0, route_info->devices 0 

D/alsa_pcm(  170): pcm_open(0x0011f000)

D/alsa_pcm(  170): pcm_open() card 0, device 0, Playback

D/alsa_pcm(  170): set audio rate 48KHz

D/alsa_route(  170): route_set_controls() set route 0

W/MediaPlayer( 3602): info/warning (3, 0)

W/MediaPlayer( 3602): info/warning (702, 0)

W/AudioFlinger(  170): write blocked for 411 msecs, 4 delayed writes, thread 0xb58e2008