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/* Codecs handling */
/*
* This file is part of gapk (GSM Audio Pocket Knife).
*
* gapk is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gapk is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with gapk. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GAPK_CODECS_H__
#define __GAPK_CODECS_H__
#include <stdint.h>
#define FR_CANON_LEN 33
#define HR_CANON_LEN 14
#define EFR_CANON_LEN 31
#define PCM_CANON_LEN (160*sizeof(uint16_t))
enum codec_type {
CODEC_INVALID = 0,
CODEC_PCM, /* 16 bits PCM samples */
CODEC_HR, /* GSM Half Rate codec GSM 06.20 */
CODEC_FR, /* GSM Full Rate codec GSM 06.10 */
CODEC_EFR, /* GSM Enhanced Full Rate codec GSM 06.60 */
_CODEC_MAX,
};
#include <gapk/formats.h> /* need to import here because or enum interdep */
typedef int (*codec_conv_cb_t)(void *state, uint8_t *dst, const uint8_t *src);
struct codec_desc {
enum codec_type type;
const char * name;
const char * description;
unsigned int canon_frame_len;
enum format_type codec_enc_format_type; /* what the encoder provides */
enum format_type codec_dec_format_type; /* what to give the decoder */
void * (*codec_init)(void);
void (*codec_exit)(void *state);
codec_conv_cb_t codec_encode;
codec_conv_cb_t codec_decode;
};
const struct codec_desc *codec_get_from_type(enum codec_type type);
#endif /* __GAPK_CODECS_H__ */
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