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