mirror of https://gerrit.osmocom.org/gapk
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/* FR (GSM 06.10) codec */
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/*
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* This file is part of gapk (GSM Audio Pocket Knife).
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*
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* gapk is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* gapk 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with gapk. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <osmocom/gapk/codecs.h>
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#include <osmocom/gapk/benchmark.h>
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#include <osmocom/gapk/bench.h>
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#include "config.h"
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#ifdef HAVE_LIBGSM
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/* Find header */
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#ifdef HAVE_GSM_H
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# include <gsm.h>
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#elif HAVE_GSM_GSM_H
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# include <gsm/gsm.h>
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#else
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# error "Can't find gsm.h header anywhere ..."
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#endif
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#include <string.h>
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static void *
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codec_fr_init(void)
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{
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return (void *)gsm_create();
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}
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static void
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codec_fr_exit(void *state)
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{
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gsm_destroy( (gsm)state );
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}
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static int
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codec_fr_encode(void *state, uint8_t *cod, const uint8_t *pcm, unsigned int pcm_len)
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{
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gsm gh = (gsm)state;
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uint8_t pcm_b[PCM_CANON_LEN]; /* local copy as libgsm src isn't const ! */
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assert(pcm_len == PCM_CANON_LEN);
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memcpy(pcm_b, pcm, PCM_CANON_LEN);
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BENCHMARK_START;
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gsm_encode(gh, (gsm_signal*)pcm, (gsm_byte*)cod);
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BENCHMARK_STOP(CODEC_FR, 1);
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return FR_CANON_LEN;
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}
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static int
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codec_fr_decode(void *state, uint8_t *pcm, const uint8_t *cod, unsigned int cod_len)
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{
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gsm gh = (gsm)state;
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uint8_t cod_b[FR_CANON_LEN]; /* local copy as libgsm src isn't const ! */
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int rc;
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assert(cod_len == FR_CANON_LEN);
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memcpy(cod_b, cod, FR_CANON_LEN);
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BENCHMARK_START;
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rc = gsm_decode(gh, (gsm_byte*)cod_b, (gsm_signal*)pcm);
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BENCHMARK_STOP(CODEC_FR, 0);
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if (rc < 0)
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return rc;
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return PCM_CANON_LEN;
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}
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#endif /* HAVE_LIBGSM */
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/* Forward declaration of ECU (Error Concealment Unit) function */
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int ecu_proc_fr(void *state, uint8_t *out, const uint8_t *in, unsigned int in_len);
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const struct osmo_gapk_codec_desc codec_fr_desc = {
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.type = CODEC_FR,
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.name = "fr",
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.description = "GSM 06.10 Full Rate codec (classic gsm codec)",
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.canon_frame_len = FR_CANON_LEN,
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#ifdef HAVE_LIBGSM
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.codec_enc_format_type = FMT_GSM,
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.codec_dec_format_type = FMT_GSM,
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.codec_init = codec_fr_init,
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.codec_exit = codec_fr_exit,
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.codec_encode = codec_fr_encode,
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.codec_decode = codec_fr_decode,
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#endif
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.ecu_proc = ecu_proc_fr,
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};
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