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.
61 lines
2.2 KiB
61 lines
2.2 KiB
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose: Define the IVoiceCodec interface.
|
|
//
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
|
|
#ifndef IVOICECODEC_H
|
|
#define IVOICECODEC_H
|
|
#pragma once
|
|
|
|
|
|
#include "interface.h"
|
|
|
|
|
|
#define BYTES_PER_SAMPLE 2
|
|
|
|
|
|
// This interface is for voice codecs to implement.
|
|
|
|
// Codecs are guaranteed to be called with the exact output from Compress into Decompress (ie:
|
|
// data won't be stuck together and sent to Decompress).
|
|
|
|
// Decompress is not guaranteed to be called in any specific order relative to Compress, but
|
|
// Codecs maintain state between calls, so it is best to call Compress with consecutive voice data
|
|
// and decompress likewise. If you call it out of order, it will sound wierd.
|
|
|
|
// In the same vein, calling Decompress twice with the same data is a bad idea since the state will be
|
|
// expecting the next block of data, not the same block.
|
|
|
|
class IVoiceCodec
|
|
{
|
|
protected:
|
|
virtual ~IVoiceCodec() {}
|
|
|
|
public:
|
|
// Initialize the object. The uncompressed format is always 8-bit signed mono.
|
|
virtual bool Init( int quality )=0;
|
|
|
|
// Use this to delete the object.
|
|
virtual void Release()=0;
|
|
|
|
|
|
// Compress the voice data.
|
|
// pUncompressed - 16-bit signed mono voice data.
|
|
// maxCompressedBytes - The length of the pCompressed buffer. Don't exceed this.
|
|
// bFinal - Set to true on the last call to Compress (the user stopped talking).
|
|
// Some codecs like big block sizes and will hang onto data you give them in Compress calls.
|
|
// When you call with bFinal, the codec will give you compressed data no matter what.
|
|
// Return the number of bytes you filled into pCompressed.
|
|
virtual int Compress(const char *pUncompressed, int nSamples, char *pCompressed, int maxCompressedBytes, bool bFinal)=0;
|
|
|
|
// Decompress voice data. pUncompressed is 16-bit signed mono.
|
|
virtual int Decompress(const char *pCompressed, int compressedBytes, char *pUncompressed, int maxUncompressedBytes)=0;
|
|
|
|
// Some codecs maintain state between Compress and Decompress calls. This should clear that state.
|
|
virtual bool ResetState()=0;
|
|
};
|
|
|
|
|
|
#endif // IVOICECODEC_H
|