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Diffstat (limited to 'utils/hlfaceposer/snd_audio_source.h')
| -rw-r--r-- | utils/hlfaceposer/snd_audio_source.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/utils/hlfaceposer/snd_audio_source.h b/utils/hlfaceposer/snd_audio_source.h new file mode 100644 index 0000000..a60f14b --- /dev/null +++ b/utils/hlfaceposer/snd_audio_source.h @@ -0,0 +1,124 @@ +//========= 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 int GetScrubPosition( void ) = 0; + + virtual bool SetSamplePosition( int position, bool scrubbing = false ) = 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; + + virtual void SetVolume( float volume ) = 0; + virtual channel_t *GetChannel() = 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 int GetNumChannels() = 0; + virtual bool IsStereoWav( void ) = 0; + + virtual CSentence *GetSentence( void ) { return NULL; }; +}; + + +extern CAudioSource *AudioSource_Create( const char *pName ); + +#endif // SND_AUDIO_SOURCE_H |