You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
119 lines
4.4 KiB
119 lines
4.4 KiB
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
// $Workfile: $
|
|
// $Date: $
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
// $Log: $
|
|
//
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
|
|
#ifndef SND_AUDIO_SOURCE_H
|
|
#define SND_AUDIO_SOURCE_H
|
|
#pragma once
|
|
|
|
|
|
// fixed point stuff for real-time resampling
|
|
#define FIX_BITS 28
|
|
#define FIX_SCALE (1 << FIX_BITS)
|
|
#define FIX_MASK ((1 << FIX_BITS)-1)
|
|
#define FIX_FLOAT(a) ((int)((a) * FIX_SCALE))
|
|
#define FIX(a) (((int)(a)) << FIX_BITS)
|
|
#define FIX_INTPART(a) (((int)(a)) >> FIX_BITS)
|
|
#define FIX_FRACTION(a,b) (FIX(a)/(b))
|
|
#define FIX_FRACPART(a) ((a) & FIX_MASK)
|
|
|
|
typedef unsigned int fixedint;
|
|
|
|
typedef struct channel_s channel_t;
|
|
|
|
class CAudioSource;
|
|
|
|
class IAudioDevice
|
|
{
|
|
public:
|
|
// Add a virtual destructor to silence the clang warning.
|
|
// This is harmless but not important since the only derived class
|
|
// doesn't have a destructor.
|
|
virtual ~IAudioDevice() {}
|
|
|
|
virtual void MixBegin( void ) = 0;
|
|
virtual void Mix8Mono( channel_t *pChannel, char *pData, int outputOffset, int inputOffset, int rateScaleFix, int outCount, int timecompress, bool forward = true ) = 0;
|
|
virtual void Mix8Stereo( channel_t *pChannel, char *pData, int outputOffset, int inputOffset, int rateScaleFix, int outCount, int timecompress, bool forward = true ) = 0;
|
|
virtual void Mix16Mono( channel_t *pChannel, short *pData, int outputOffset, int inputOffset, int rateScaleFix, int outCount, int timecompress, bool forward = true ) = 0;
|
|
virtual void Mix16Stereo( channel_t *pChannel, short *pData, int outputOffset, int inputOffset, int rateScaleFix, int outCount, int timecompress, bool forward = true ) = 0;
|
|
virtual int MaxSampleCount( void ) = 0;
|
|
};
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: This is an instance of an audio source.
|
|
// Mixers are attached to channels and reference an audio source.
|
|
// Mixers are specific to the sample format and source format.
|
|
// Mixers are never re-used, so they can track instance data like
|
|
// sample position, fractional sample, stream cache, faders, etc.
|
|
//-----------------------------------------------------------------------------
|
|
class CAudioMixer
|
|
{
|
|
public:
|
|
virtual ~CAudioMixer( void ) {}
|
|
|
|
// UNDONE: time compress
|
|
virtual bool MixDataToDevice( IAudioDevice *pDevice, channel_t *pChannel, int startSample, int sampleCount, int outputRate, bool forward = true ) = 0;
|
|
virtual void IncrementSamples( channel_t *pChannel, int startSample, int sampleCount,int outputRate, bool forward = true ) = 0;
|
|
virtual bool SkipSamples( channel_t *pChannel, int startSample, int sampleCount, int outputRate, bool forward = true ) = 0;
|
|
|
|
virtual CAudioSource *GetSource( void ) = 0;
|
|
|
|
virtual int GetSamplePosition( void ) = 0;
|
|
|
|
virtual bool SetSamplePosition( int position ) = 0;
|
|
virtual void SetLoopPosition( int position ) = 0;
|
|
virtual int GetStartPosition( void ) = 0;
|
|
|
|
virtual bool GetActive( void ) = 0;
|
|
virtual void SetActive( bool active ) = 0;
|
|
|
|
virtual void SetModelIndex( int index ) = 0;
|
|
virtual int GetModelIndex( void ) const = 0;
|
|
|
|
virtual void SetDirection( bool forward ) = 0;
|
|
virtual bool GetDirection( void ) const = 0;
|
|
|
|
virtual void SetAutoDelete( bool autodelete ) = 0;
|
|
virtual bool GetAutoDelete( void ) const = 0;
|
|
};
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: A source is an abstraction for a stream, cached file, or procedural
|
|
// source of audio.
|
|
//-----------------------------------------------------------------------------
|
|
class CSentence;
|
|
|
|
class CAudioSource
|
|
{
|
|
public:
|
|
CAudioSource( void );
|
|
virtual ~CAudioSource( void );
|
|
|
|
// Create an instance (mixer) of this audio source
|
|
virtual CAudioMixer *CreateMixer( void ) = 0;
|
|
virtual int GetOutputData( void **pData, int samplePosition, int sampleCount, bool forward = true ) = 0;
|
|
virtual int SampleRate( void ) = 0;
|
|
virtual int SampleSize( void ) = 0;
|
|
virtual int SampleCount( void ) = 0;
|
|
virtual float TrueSampleSize( void ) = 0;
|
|
virtual bool IsLooped( void ) = 0;
|
|
virtual bool IsStreaming( void ) = 0;
|
|
virtual float GetRunningLength( void ) = 0;
|
|
|
|
virtual CSentence *GetSentence( void ) { return NULL; };
|
|
|
|
};
|
|
|
|
|
|
extern CAudioSource *AudioSource_Create( const char *pName );
|
|
|
|
#endif // SND_AUDIO_SOURCE_H
|