From 3f9eb321481de3e118632a594bf1b0c9001c281c Mon Sep 17 00:00:00 2001 From: Steve Kondik Date: Fri, 22 Apr 2016 18:32:39 -0700 Subject: audiopolicy: Add AudioSessionInfo API * This patch introduces a new API which allows applications to query the state of the audio effects system, and receive callbacks with the necessary information to attach effects to any stream. * In the future, this may come as part of the AudioPort system, but since that's an active area of development by Google, we will dodge it for now. * The policy now simply keeps a refcounted list of objects which hold various bits of stream metadata. Callbacks are sent on stream open/close to applications which might be listening for them. Change-Id: I2d554d36e1378f4eb7b276010a3bfe8345c22ecd --- include/media/AudioSystem.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/media/AudioSystem.h') diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h index 26a0bb2..3f4a610 100644 --- a/include/media/AudioSystem.h +++ b/include/media/AudioSystem.h @@ -31,6 +31,8 @@ namespace android { typedef void (*audio_error_callback)(status_t err); typedef void (*dynamic_policy_callback)(int event, String8 regId, int val); +typedef void (*audio_session_callback)(int event, + sp& session, bool added); class IAudioFlinger; class IAudioPolicyService; @@ -92,6 +94,7 @@ public: static void setErrorCallback(audio_error_callback cb); static void setDynPolicyCallback(dynamic_policy_callback cb); + static status_t setAudioSessionCallback(audio_session_callback cb); // helper function to obtain AudioFlinger service handle static const sp get_audio_flinger(); @@ -319,6 +322,8 @@ public: audio_io_handle_t *handle); static status_t stopAudioSource(audio_io_handle_t handle); + static status_t listAudioSessions(audio_stream_type_t streams, + Vector< sp> &sessions); // ---------------------------------------------------------------------------- @@ -419,6 +424,7 @@ private: virtual void onAudioPortListUpdate(); virtual void onAudioPatchListUpdate(); virtual void onDynamicPolicyMixStateUpdate(String8 regId, int32_t state); + virtual void onOutputSessionEffectsUpdate(sp& info, bool added); private: Mutex mLock; @@ -438,6 +444,7 @@ private: static sp gAudioFlinger; static audio_error_callback gAudioErrorCallback; static dynamic_policy_callback gDynPolicyCallback; + static audio_session_callback gAudioSessionCallback; static size_t gInBuffSize; // previous parameters for recording buffer size queries -- cgit v1.1