// Enabling post processing in AUDIO_SESSION_OUTPUT_STAGE session does not affect // global effects if ((sessionId != AUDIO_SESSION_OUTPUT_MIX) && (sessionId != AUDIO_SESSION_OUTPUT_STAGE)) { setEffectSuspended_l(NULL, enabled, AUDIO_SESSION_OUTPUT_MIX); ...
在这里我们所有的音效都是全局的,即创建音效时指定的sessionId为AUDIO_SESSION_OUTPUT_MIX 这样系统创建一次音效,音效链将会一直绑定在audioflinger上,整个系统将一直有音效作用,而不必像一般内度应用那样创建的时候获取mediaplayer或是audiotrack的sessionId 参数audioSession,相同audioSession ID的AudioTrack和MediaPlayer共享...
mRecorder为MediaRecorderBase实例,StagefrightRecorder继承于MediaRecorderBase,这里继续看StagefrightRecorder frameworks/av/media/libmediaplayerservice/StagefrightRecorder.cpp struct StagefrightRecorder : public MediaRecorderBase { status_t StagefrightRecorder::setAudioSource(audio_source_t as) { if (as == AUDI...
--- // Session AudioSystem::SESSION_OUTPUT_STAGE is reservedfor output stage effects // can only be created by audio policy manager (running in same ) if (sessionId == AudioSystem::SESSION_OUTPUT_STAGE && getpid() != pid) { lStatus = PERMISSION_DENIED; goto Exit; } //...
protocol AVAudioSessionSpatialExperience A protocol that defines types of spatial audio experiences that the system supports. struct HeadTrackedSpatialExperience An experience where the sound a size dictated by its sound stage and location dictated by its anchoring strategy. struct FixedSpatialExperience An...
output: 输出通道output句柄,空指针,最后确定好输出通道时,会将通道写入这个指针并返回回去 session: 与客户端会话的值,在AudioFlinger时就创建好得到具体值,并传递到这里,最终输出通道确定后会保存这个session,后续就可以使用这个session来确定连接关系 attr: 来自应用层传递的usage、contentType、flag等参数 ...
But, a good music session can take away all this and deliver solace to them. It's like having a trusty sidekick that's comfortable, lasts the long haul, and lets you hear clearly, no matter how loud that engine gets. So, we've done the homework for you and rounded up the Top 10...
Audio Session If your app is going to use a more sophisticated way of producing sound, such as an audio player (discussed in the next section), it must specify a policy regarding that sound. This policy will answer such questions as: should sound stop when the screen is locked? Should ...
Focusrite Control 2 is a powerful app for your Scarlett to make session setup painless, so you can focus on what matters — capturing great performances. Quickly configure routings, set up monitor mixes, save presets, and manage levels straight from your desktop computer. Available for PC and...
Focusrite Control 2 is a powerful app for your Scarlett to make session setup painless, so you can focus on what matters — capturing great performances. Quickly configure routings, set up monitor mixes, save presets, and manage levels straight from your desktop computer. Available for PC and...