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 mGenerations[FastMixerState::kMaxFastTracks]; 61 // last observed mFastTracks[i].mGeneration 62 NBAIO_Sink* mOutputSink; 63 int mOutputSinkGen; 64 AudioMixer* mMixer; 65 66 // mSinkBuffer audio format is stored in format.mFormat. 67 void* mSinkBuffer; // used for mixer output format translation 68 // if sink format is different than mixer output. 69 size_t mSinkBufferSize; 70 uint32_t mSinkChannelCount; 71 audio_channel_mask_t mSinkChannelMask; 72 void* mMixerBuffer; // mixer output buffer. 73 size_t mMixerBufferSize; 74 audio_format_t mMixerBufferFormat; // mixer output format: AUDIO_FORMAT_PCM_(16_BIT|FLOAT). 75 76 enum {UNDEFINED, MIXED, ZEROED} mMixerBufferState; 77 NBAIO_Format mFormat; 78 unsigned mSampleRate; 79 int mFastTracksGen; 80 FastMixerDumpState mDummyFastMixerDumpState; 81 int64_t mTotalNativeFramesWritten; // copied to dumpState->mFramesWritten 82 83 // next 2 fields are valid only when timestampStatus == NO_ERROR 84 ExtendedTimestamp mTimestamp; 85 int64_t mNativeFramesWrittenButNotPresented; 86 87 // accessed without lock between multiple threads. 88 std::atomic_bool mMasterMono; 89 std::atomic_int_fast64_t mBoottimeOffset; 90 }; // class FastMixer 91 92 } // namespace android 93 94 #endif // ANDROID_AUDIO_FAST_MIXER_H 95