60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose: Mixer for ADPCM encoded audio
|
|
//
|
|
//=============================================================================//
|
|
|
|
#ifndef SND_WAVE_MIXER_MP3_H
|
|
#define SND_WAVE_MIXER_MP3_H
|
|
#pragma once
|
|
|
|
#include "vaudio/ivaudio.h"
|
|
|
|
static const int MP3_BUFFER_SIZE = 16384;
|
|
|
|
class CAudioMixerWaveMP3 : public CAudioMixerWave, public IAudioStreamEvent
|
|
{
|
|
public:
|
|
CAudioMixerWaveMP3( IWaveData *data );
|
|
~CAudioMixerWaveMP3( void );
|
|
|
|
virtual void Mix( IAudioDevice *pDevice, channel_t *pChannel, void *pData, int outputOffset, int inputOffset, fixedint fracRate, int outCount, int timecompress );
|
|
virtual int GetOutputData( void **pData, int sampleCount, char copyBuf[AUDIOSOURCE_COPYBUF_SIZE] );
|
|
|
|
// need to override this to fixup blocks
|
|
// UNDONE: This doesn't quite work with MP3 - we need a MP3 position, not a sample position
|
|
void SetSampleStart( int newPosition );
|
|
|
|
int GetPositionForSave() { return GetStream() ? GetStream()->GetPosition() : 0; }
|
|
void SetPositionFromSaved(int position) { if ( GetStream() ) GetStream()->SetPosition(position); }
|
|
|
|
// IAudioStreamEvent
|
|
virtual int StreamRequestData( void *pBuffer, int bytesRequested, int offset );
|
|
|
|
virtual void SetStartupDelaySamples( int delaySamples );
|
|
virtual int GetMixSampleSize() { return CalcSampleSize( 16, m_channelCount ); }
|
|
|
|
virtual int GetStreamOutputRate() { return GetStream() ? GetStream()->GetOutputRate() : 0; }
|
|
|
|
private:
|
|
IAudioStream *GetStream();
|
|
bool DecodeBlock( void );
|
|
void GetID3HeaderOffset();
|
|
|
|
// Lazily initialized, use GetStream
|
|
IAudioStream *m_pStream;
|
|
bool m_bStreamInit;
|
|
|
|
char m_samples[MP3_BUFFER_SIZE];
|
|
int m_sampleCount;
|
|
int m_samplePosition;
|
|
int m_channelCount;
|
|
int m_offset;
|
|
int m_delaySamples;
|
|
int m_headerOffset;
|
|
};
|
|
|
|
CAudioMixerWaveMP3 *CreateMP3Mixer( IWaveData *data );
|
|
|
|
#endif // SND_WAVE_MIXER_MP3_H
|