121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
|
//==========================================================================;
|
||
|
|
//
|
||
|
|
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||
|
|
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||
|
|
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
|
||
|
|
// PURPOSE.
|
||
|
|
//
|
||
|
|
// Copyright (c) 1993-1996 Microsoft Corporation
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------------;
|
||
|
|
//
|
||
|
|
// g711.h
|
||
|
|
//
|
||
|
|
// Description:
|
||
|
|
// This file contains prototypes for the filtering routines.
|
||
|
|
//
|
||
|
|
//
|
||
|
|
//==========================================================================;
|
||
|
|
|
||
|
|
#ifndef _INC_G711
|
||
|
|
#define _INC_G711 // #defined if g711.h has been included
|
||
|
|
|
||
|
|
#ifndef RC_INVOKED
|
||
|
|
#pragma pack(1) // assume byte packing throughout
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef EXTERN_C
|
||
|
|
#ifdef __cplusplus
|
||
|
|
#define EXTERN_C extern "C"
|
||
|
|
#else
|
||
|
|
#define EXTERN_C extern
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" // assume C declarations for C++
|
||
|
|
{
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
//
|
||
|
|
//
|
||
|
|
#define G711_MAX_CHANNELS 2
|
||
|
|
#define G711_BITS_PER_SAMPLE 8
|
||
|
|
#define G711_WFX_EXTRA_BYTES 0
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// macros to compute block alignment and convert between samples and bytes
|
||
|
|
// of G711 data. note that these macros assume:
|
||
|
|
//
|
||
|
|
// wBitsPerSample = 8
|
||
|
|
// nChannels = 1 or 2
|
||
|
|
//
|
||
|
|
// the pwfx argument is a pointer to a WAVEFORMATEX structure.
|
||
|
|
//
|
||
|
|
#define G711_BLOCKALIGNMENT(pwfx) (UINT)(pwfx->nChannels)
|
||
|
|
#define G711_AVGBYTESPERSEC(pwfx) (DWORD)((pwfx)->nSamplesPerSec * (pwfx)->nChannels)
|
||
|
|
#define G711_BYTESTOSAMPLES(pwfx, dw) (DWORD)(dw / G711_BLOCKALIGNMENT(pwfx))
|
||
|
|
#define G711_SAMPLESTOBYTES(pwfx, dw) (DWORD)(dw * G711_BLOCKALIGNMENT(pwfx))
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// function prototypes from G711.C
|
||
|
|
//
|
||
|
|
//
|
||
|
|
LRESULT FNGLOBAL AlawToPcm
|
||
|
|
(
|
||
|
|
LPACMDRVSTREAMINSTANCE padsi,
|
||
|
|
LPACMDRVSTREAMHEADER padsh
|
||
|
|
);
|
||
|
|
|
||
|
|
LRESULT FNGLOBAL PcmToAlaw
|
||
|
|
(
|
||
|
|
LPACMDRVSTREAMINSTANCE padsi,
|
||
|
|
LPACMDRVSTREAMHEADER padsh
|
||
|
|
);
|
||
|
|
|
||
|
|
LRESULT FNGLOBAL UlawToPcm
|
||
|
|
(
|
||
|
|
LPACMDRVSTREAMINSTANCE padsi,
|
||
|
|
LPACMDRVSTREAMHEADER padsh
|
||
|
|
);
|
||
|
|
|
||
|
|
LRESULT FNGLOBAL PcmToUlaw
|
||
|
|
(
|
||
|
|
LPACMDRVSTREAMINSTANCE padsi,
|
||
|
|
LPACMDRVSTREAMHEADER padsh
|
||
|
|
);
|
||
|
|
|
||
|
|
LRESULT FNGLOBAL AlawToUlaw
|
||
|
|
(
|
||
|
|
LPACMDRVSTREAMINSTANCE padsi,
|
||
|
|
LPACMDRVSTREAMHEADER padsh
|
||
|
|
);
|
||
|
|
|
||
|
|
LRESULT FNGLOBAL UlawToAlaw
|
||
|
|
(
|
||
|
|
LPACMDRVSTREAMINSTANCE padsi,
|
||
|
|
LPACMDRVSTREAMHEADER padsh
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
|
||
|
|
//
|
||
|
|
//
|
||
|
|
//
|
||
|
|
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
|
||
|
|
|
||
|
|
#ifndef RC_INVOKED
|
||
|
|
#pragma pack() // revert to default packing
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
} // end of extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // _INC_G711
|