1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_AUDIO_FAST_MIXER_H 18 #define ANDROID_AUDIO_FAST_MIXER_H 19 20 #include <atomic> 21 #include "FastThread.h" 22 #include "StateQueue.h" 23 #include "FastMixerState.h" 24 #include "FastMixerDumpState.h" 25 26 namespace android { 27 28 class AudioMixer; 29 30 typedef StateQueue<FastMixerState> FastMixerStateQueue; 31 32 class FastMixer : public FastThread { 33 34 public: 35 FastMixer(); 36 virtual ~FastMixer(); 37 38 FastMixerStateQueue* sq(); 39 setMasterMono(bool mono)40 virtual void setMasterMono(bool mono) { mMasterMono.store(mono); /* memory_order_seq_cst */ } setBoottimeOffset(int64_t boottimeOffset)41 virtual void setBoottimeOffset(int64_t boottimeOffset) { 42 mBoottimeOffset.store(boottimeOffset); /* memory_order_seq_cst */ 43 } 44 private: 45 FastMixerStateQueue mSQ; 46 47 // callouts 48 virtual const FastThreadState *poll(); 49 virtual void setNBLogWriter(NBLog::Writer *logWriter); 50 virtual void onIdle(); 51 virtual void onExit(); 52 virtual bool isSubClassCommand(FastThreadState::Command command); 53 virtual void onStateChange(); 54 virtual void onWork(); 55 56 // FIXME these former local variables need comments 57 static const FastMixerState sInitial; 58 59 FastMixerState mPreIdle; // copy of state before we went into idle 60 int mFastTrackNames[FastMixerState::kMaxFastTracks]; 61 // handles used by mixer to identify tracks 62 int mGenerations[FastMixerState::kMaxFastTracks]; 63 // last observed mFastTracks[i].mGeneration 64 NBAIO_Sink* mOutputSink; 65 int mOutputSinkGen; 66 AudioMixer* mMixer; 67 68 // mSinkBuffer audio format is stored in format.mFormat. 69 void* mSinkBuffer; // used for mixer output format translation 70 // if sink format is different than mixer output. 71 size_t mSinkBufferSize; 72 uint32_t mSinkChannelCount; 73 audio_channel_mask_t mSinkChannelMask; 74 void* mMixerBuffer; // mixer output buffer. 75 size_t mMixerBufferSize; 76 audio_format_t mMixerBufferFormat; // mixer output format: AUDIO_FORMAT_PCM_(16_BIT|FLOAT). 77 78 enum {UNDEFINED, MIXED, ZEROED} mMixerBufferState; 79 NBAIO_Format mFormat; 80 unsigned mSampleRate; 81 int mFastTracksGen; 82 FastMixerDumpState mDummyFastMixerDumpState; 83 int64_t mTotalNativeFramesWritten; // copied to dumpState->mFramesWritten 84 85 // next 2 fields are valid only when timestampStatus == NO_ERROR 86 ExtendedTimestamp mTimestamp; 87 int64_t mNativeFramesWrittenButNotPresented; 88 89 // accessed without lock between multiple threads. 90 std::atomic_bool mMasterMono; 91 std::atomic_int_fast64_t mBoottimeOffset; 92 }; // class FastMixer 93 94 } // namespace android 95 96 #endif // ANDROID_AUDIO_FAST_MIXER_H 97