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/*
* tcaudio.h - include file for audio processing library for transcode
* Written by Andrew Church <achurch@achurch.org>
*
* This file is part of transcode, a video stream processing tool.
* transcode is free software, distributable under the terms of the GNU
* General Public License (version 2 or later). See the file COPYING
* for details.
*/
#ifndef LIBTCAUDIO_TCAUDIO_H
#define LIBTCAUDIO_TCAUDIO_H
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/*************************************************************************/
/* Handle for calling tcaudio functions, allocated by tca_init() and passed
* to all other functions to hold internal state information. Opaque to
* the caller. */
typedef struct tcahandle_ *TCAHandle;
/* Audio sample formats, used by tca_convert(). */
typedef enum {
TCA_S8 = 1,
TCA_U8,
TCA_S16BE,
TCA_S16LE,
TCA_U16BE,
TCA_U16LE,
} AudioFormat;
typedef enum {
TCA_S8_MAX = 0x7F,
TCA_U8_MAX = 0xFF,
TCA_S16BE_MAX = 0x7FFF,
TCA_S16LE_MAX = 0x7FFF,
TCA_U16BE_MAX = 0xFFFF,
TCA_U16LE_MAX = 0xFFFF,
} AudioSampleMax;
/*************************************************************************/
TCAHandle tca_init(AudioFormat format);
void tca_free(TCAHandle handle);
int tca_convert_from(TCAHandle handle, void *buf, int len, AudioFormat srcfmt);
int tca_convert_to(TCAHandle handle, void *buf, int len, AudioFormat destfmt);
int tca_amplify(TCAHandle handle, void *buf, int len, double scale,
int *nclip_ret);
int tca_mono_to_stereo(TCAHandle handle, void *buf, int len);
int tca_stereo_to_mono(TCAHandle handle, void *buf, int len);
/*************************************************************************/
#endif /* LIBTCAUDIO_TCAUDIO_H */
/*
* Local variables:
* c-file-style: "stroustrup"
* c-file-offsets: ((case-label . *) (statement-case-intro . *))
* indent-tabs-mode: nil
* End:
*
* vim: expandtab shiftwidth=4:
*/
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