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114 lines
3.8 KiB
114 lines
3.8 KiB
/////////////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 1998 Active Voice Corporation. All Rights Reserved.
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//
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// Active Agent(r) and Unified Communications(tm) are trademarks of Active Voice Corporation.
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//
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// Other brand and product names used herein are trademarks of their respective owners.
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//
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// The entire program and user interface including the structure, sequence, selection,
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// and arrangement of the dialog, the exclusively "yes" and "no" choices represented
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// by "1" and "2," and each dialog message are protected by copyrights registered in
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// the United States and by international treaties.
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//
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// Protected by one or more of the following United States patents: 5,070,526, 5,488,650,
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// 5,434,906, 5,581,604, 5,533,102, 5,568,540, 5,625,676, 5,651,054.
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//
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// Active Voice Corporation
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// Seattle, Washington
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// USA
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//
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/////////////////////////////////////////////////////////////////////////////////////////
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////
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// mulaw.h - interface to mulaw functions in mulaw.c
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////
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#ifndef __MULAW_H__
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#define __MULAW_H__
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#include "winlocal.h"
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#include "wavfmt.h"
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#define MULAW_VERSION 0x00000108
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// handle to a mulaw engine instance
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//
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DECLARE_HANDLE32(HMULAW);
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#ifdef __cplusplus
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extern "C" {
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#endif
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// these macros for compatibility with old code
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//
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#define MulawFormat(lpwfx, nSamplesPerSec) \
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WavFormatMulaw(lpwfx, nSamplesPerSec)
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// MulawInit - initialize mulaw engine
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// <dwVersion> (i) must be MULAW_VERSION
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// <hInst> (i) instance handle of calling module
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// <dwFlags> (i) reserved; must be 0
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// return handle (NULL if error)
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//
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HMULAW DLLEXPORT WINAPI MulawInit(DWORD dwVersion, HINSTANCE hInst, DWORD dwFlags);
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// MulawTerm - shut down mulaw engine
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// <hMulaw> (i) handle returned from MulawInit
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// return 0 if success
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//
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int DLLEXPORT WINAPI MulawTerm(HMULAW hMulaw);
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// MulawReset - reset mulaw engine
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// <hMulaw> (i) handle returned from MulawInit
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// return 0 if success
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//
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int DLLEXPORT WINAPI MulawReset(HMULAW hMulaw);
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// MulawDecode - decode mulaw samples
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// <hMulaw> (i) handle returned from MulawInit
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// <lpabMulaw> (i) array of encoded samples
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// <lpaiPcm> (o) array of decoded samples
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// <uSamples> (i) number of samples to decode
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// return 0 if success
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//
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// NOTE: each BYTE in <lpabMulaw> contains 1 8-bit encoded sample
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// in Mulaw format.
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// Each PCM16 in <lpaiPcm> contains 1 16-bit decoded sample
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// in standard PCM format.
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//
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int DLLEXPORT WINAPI MulawDecode(HMULAW hMulaw, LPBYTE lpabMulaw, LPPCM16 lpaiPcm, UINT uSamples);
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// MulawEncode - encode mulaw samples
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// <hMulaw> (i) handle returned from MulawInit
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// <lpaiPcm> (i) array of decoded samples
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// <lpabMulaw> (o) array of encoded samples
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// <uSamples> (i) number of samples to encode
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// return 0 if success
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//
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// NOTE: each BYTE in <lpabMulaw> contains 1 8-bit encoded sample
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// in Mulaw format.
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// Each PCM16 in <lpaiPcm> contains 1 16-bit decoded sample
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// in standard PCM format.
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//
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int DLLEXPORT WINAPI MulawEncode(HMULAW hMulaw, LPPCM16 lpaiPcm, LPBYTE lpabMulaw, UINT uSamples);
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// MulawIOProc - i/o procedure for mulaw format file data
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// <lpmmioinfo> (i/o) information about open file
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// <uMessage> (i) message indicating the requested I/O operation
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// <lParam1> (i) message specific parameter
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// <lParam2> (i) message specific parameter
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// returns 0 if message not recognized, otherwise message specific value
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//
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// NOTE: the address of this function should be passed to the WavOpen()
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// or mmioInstallIOProc() functions for accessing mulaw format file data.
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//
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LRESULT DLLEXPORT CALLBACK MulawIOProc(LPTSTR lpmmioinfo,
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UINT uMessage, LPARAM lParam1, LPARAM lParam2);
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#ifdef __cplusplus
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}
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#endif
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#endif // __MULAW_H__
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