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/* FR (GSM 06.10) codec */
/*
* 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/>.
*/
#include <gapk/codecs.h>
#include "config.h"
#ifdef HAVE_LIBGSM
/* Find header */
#ifdef HAVE_GSM_H
# include <gsm.h>
#elif HAVE_GSM_GSM_H
# include <gsm/gsm.h>
#else
# error "Can't find gsm.h header anywhere ..."
#endif
#include <string.h>
static void *
codec_fr_init(void)
{
return (void *)gsm_create();
}
static void
codec_fr_exit(void *state)
{
gsm_destroy( (gsm)state );
}
static int
codec_fr_encode(void *state, uint8_t *cod, const uint8_t *pcm)
{
gsm gh = (gsm)state;
uint8_t pcm_b[2*160]; /* local copy as libgsm src isn't const ! */
memcpy(pcm_b, pcm, 2*160);
gsm_encode(gh, (gsm_signal*)pcm, (gsm_byte*)cod);
return 0;
}
static int
codec_fr_decode(void *state, uint8_t *pcm, const uint8_t *cod)
{
gsm gh = (gsm)state;
uint8_t cod_b[33]; /* local copy as libgsm src isn't const ! */
memcpy(cod_b, cod, 33);
return gsm_decode(gh, (gsm_byte*)cod_b, (gsm_signal*)pcm);
}
#endif /* HAVE_LIBGSM */
const struct codec_desc codec_fr_desc = {
.type = CODEC_FR,
.name = "fr",
.description = "GSM 06.10 Full Rate codec (classic gsm codec)",
.canon_frame_len = 33,
#ifdef HAVE_LIBGSM
.codec_enc_format_type = FMT_GSM,
.codec_dec_format_type = FMT_GSM,
.codec_init = codec_fr_init,
.codec_exit = codec_fr_exit,
.codec_encode = codec_fr_encode,
.codec_decode = codec_fr_decode,
#endif
};
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