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/*
* Copyright (C) 2012 The Android Open Source 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_AUDIO_FAST_MIXER_H
#define ANDROID_AUDIO_FAST_MIXER_H
#include "FastThread.h"
#include "StateQueue.h"
#include "FastMixerState.h"
#include "FastMixerDumpState.h"
namespace android {
class AudioMixer;
typedef StateQueue<FastMixerState> FastMixerStateQueue;
class FastMixer : public FastThread {
public:
FastMixer();
virtual ~FastMixer();
FastMixerStateQueue* sq();
private:
FastMixerStateQueue mSQ;
// callouts
virtual const FastThreadState *poll();
virtual void setLog(NBLog::Writer *logWriter);
virtual void onIdle();
virtual void onExit();
virtual bool isSubClassCommand(FastThreadState::Command command);
virtual void onStateChange();
virtual void onWork();
// FIXME these former local variables need comments and to be renamed to have "m" prefix
static const FastMixerState initial;
FastMixerState preIdle; // copy of state before we went into idle
long slopNs; // accumulated time we've woken up too early (> 0) or too late (< 0)
int fastTrackNames[FastMixerState::kMaxFastTracks]; // handles used by mixer to identify tracks
int generations[FastMixerState::kMaxFastTracks]; // last observed mFastTracks[i].mGeneration
NBAIO_Sink *outputSink;
int outputSinkGen;
AudioMixer* mixer;
// mSinkBuffer audio format is stored in format.mFormat.
void* mSinkBuffer; // used for mixer output format translation
// if sink format is different than mixer output.
size_t mSinkBufferSize;
uint32_t mSinkChannelCount;
audio_channel_mask_t mSinkChannelMask;
void* mMixerBuffer; // mixer output buffer.
size_t mMixerBufferSize;
audio_format_t mMixerBufferFormat; // mixer output format: AUDIO_FORMAT_PCM_(16_BIT|FLOAT).
enum {UNDEFINED, MIXED, ZEROED} mMixerBufferState;
NBAIO_Format format;
unsigned sampleRate;
int fastTracksGen;
FastMixerDumpState dummyDumpState;
uint32_t totalNativeFramesWritten; // copied to dumpState->mFramesWritten
// next 2 fields are valid only when timestampStatus == NO_ERROR
AudioTimestamp timestamp;
uint32_t nativeFramesWrittenButNotPresented;
}; // class FastMixer
} // namespace android
#endif // ANDROID_AUDIO_FAST_MIXER_H
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