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/AudioPolicy.h | 2 + include/media/AudioSession.h | 71 +++++++++++++++++++++++++++++++ include/media/AudioSystem.h | 7 +++ include/media/IAudioPolicyService.h | 3 ++ include/media/IAudioPolicyServiceClient.h | 3 ++ 5 files changed, 86 insertions(+) create mode 100644 include/media/AudioSession.h (limited to 'include/media') diff --git a/include/media/AudioPolicy.h b/include/media/AudioPolicy.h index feed402..7e33df7 100644 --- a/include/media/AudioPolicy.h +++ b/include/media/AudioPolicy.h @@ -23,6 +23,7 @@ #include #include #include +#include namespace android { @@ -42,6 +43,7 @@ namespace android { // AudioSystem's implementation of the AudioPolicyClient interface // keep in sync with AudioSystem.java #define DYNAMIC_POLICY_EVENT_MIX_STATE_UPDATE 0 +#define AUDIO_OUTPUT_SESSION_EFFECTS_UPDATE 10 #define MIX_STATE_DISABLED -1 #define MIX_STATE_IDLE 0 diff --git a/include/media/AudioSession.h b/include/media/AudioSession.h new file mode 100644 index 0000000..d9658cc --- /dev/null +++ b/include/media/AudioSession.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2016 The CyanogenMod Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ANDROID_AUDIOSESSION_H +#define ANDROID_AUDIOSESSION_H + +#include +#include + +#include + +#include +#include +#include + +namespace android { + +// class to store streaminfo +class AudioSessionInfo : public RefBase { +public: + AudioSessionInfo(int session, audio_stream_type_t stream, audio_output_flags_t flags, + audio_channel_mask_t channelMask, uid_t uid) : + mSessionId(session), mStream(stream), mFlags(flags), mChannelMask(channelMask), + mUid(uid), mRefCount(0) {} + + AudioSessionInfo() : mSessionId(0), mStream(AUDIO_STREAM_DEFAULT), mFlags(AUDIO_OUTPUT_FLAG_NONE), mChannelMask(AUDIO_CHANNEL_NONE), mUid(0) {} + + /*virtual*/ ~AudioSessionInfo() {} + + int mSessionId; + audio_stream_type_t mStream; + audio_output_flags_t mFlags; + audio_channel_mask_t mChannelMask; + uid_t mUid; + + // AudioPolicyManager keeps mLock, no need for lock on reference count here + int mRefCount; + + void readFromParcel(const Parcel &parcel) { + mSessionId = parcel.readInt32(); + mStream = static_cast(parcel.readInt32()); + mFlags = static_cast(parcel.readInt32()); + mChannelMask = static_cast(parcel.readInt32()); + mUid = static_cast(parcel.readInt32()); + } + + void writeToParcel(Parcel *parcel) const { + parcel->writeInt32(mSessionId); + parcel->writeInt32(mStream); + parcel->writeInt32(mFlags); + parcel->writeInt32(mChannelMask); + parcel->writeInt32(mUid); + } +}; + +}; // namespace android + +#endif // ANDROID_AUDIOSESSION_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 diff --git a/include/media/IAudioPolicyService.h b/include/media/IAudioPolicyService.h index 6b93f6f..1df91ee 100644 --- a/include/media/IAudioPolicyService.h +++ b/include/media/IAudioPolicyService.h @@ -165,6 +165,9 @@ public: const audio_attributes_t *attributes, audio_io_handle_t *handle) = 0; virtual status_t stopAudioSource(audio_io_handle_t handle) = 0; + + virtual status_t listAudioSessions(audio_stream_type_t streams, + Vector< sp> &sessions) = 0; }; diff --git a/include/media/IAudioPolicyServiceClient.h b/include/media/IAudioPolicyServiceClient.h index a7f2cc3..ec38157 100644 --- a/include/media/IAudioPolicyServiceClient.h +++ b/include/media/IAudioPolicyServiceClient.h @@ -21,6 +21,7 @@ #include #include #include +#include namespace android { @@ -37,6 +38,8 @@ public: virtual void onAudioPatchListUpdate() = 0; // Notifies a change in the mixing state of a specific mix in a dynamic audio policy virtual void onDynamicPolicyMixStateUpdate(String8 regId, int32_t state) = 0; + // Notifies when a default effect set is attached to a session/stream + virtual void onOutputSessionEffectsUpdate(sp& info, bool added) = 0; }; -- cgit v1.1