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https://gitlab.linphone.org/BC/public/linphone-iphone.git
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2b8200409c
git-svn-id: svn+ssh://svn.savannah.nongnu.org/linphone/trunk@1 3f6dc0c8-ddfe-455d-9043-3cd528dc4637
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
#ifndef _WIN32CODEC_H_
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#define _WIN32CODEC_H_
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/*
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Copyright 2003 Robert W. Brewer <rbrewer at op.net>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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Wrapper for Windows ACM functions mainly designed to make it easier
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to write Linphone codecs, but may be useful in other applications
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too.
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*/
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#include "wine/msacm.h"
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#include "wineacm.h"
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typedef struct _Win32Codec
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{
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HACMSTREAM handle;
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unsigned int min_insize;
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unsigned int min_outsize;
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} Win32Codec;
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typedef struct _Win32CodecDriver
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{
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PWINE_ACMDRIVERID id;
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} Win32CodecDriver;
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/* Register an ACM DLL for the corresponding formatTag.
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This should be called twice for each type of codec
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needed, once with the encode flag set to encoding
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and once for decoding (assuming both will be used).
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Under the hood a PCM registration is made when encoding
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is requested. Many instances
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of a Win32Codec in the corresponding encode/decode mode can
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be created after the DLL is registered with this call.
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Returns 0 if driver could not be created.
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*/
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Win32CodecDriver* win32codec_create_driver(const char* dllName,
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short formatTag,
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int encodeFlag);
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void win32codec_destroy_driver(Win32CodecDriver* d);
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/* Create a codec that can handle 1 stream of data
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in a single direction only. If encode is 1, the
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data will originate in 16-bit signed linear PCM format at the
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sampling rate and number of channels given in wf and be converted to wf.
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If encode is 0, it will originate in the codec specified
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by wf and be converted to 16-bit signed linear PCM at the same
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sampling rate and number of channels.
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Returns 0 if codec cannot be created correctly.
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*/
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Win32Codec* win32codec_create(const WAVEFORMATEX* wf,
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int encodeFlag);
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void win32codec_destroy(Win32Codec* c);
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/* Best to use a multiple of min_insize and min_outsize
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for inlen and outlen.
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Returns:
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-1: conversion failure
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>= 0: number of bytes used in outbuf
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*/
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signed long win32codec_convert(Win32Codec* c, const void* inbuf, long inlen,
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void* outbuf, long outlen);
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#endif /* _WIN32CODEC_H_ */
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