mirror of https://gerrit.osmocom.org/gapk
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
/* AMR (GSM 06.90) codec */
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/* (C) 2017 Harald Welte <laforge@gnumonks.org> */
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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 <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_OPENCORE_AMRNB
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#include <talloc.h>
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#include <opencore-amrnb/interf_dec.h>
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#include <opencore-amrnb/interf_enc.h>
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/* Internal root talloc context */
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extern TALLOC_CTX *gapk_root_ctx;
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struct codec_amr_state {
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void *encoder;
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void *decoder;
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};
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static void *
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codec_amr_init(void)
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{
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struct codec_amr_state *st;
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st = talloc_zero(gapk_root_ctx, struct codec_amr_state);
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if (!st)
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return NULL;
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st->encoder = Encoder_Interface_init(0);
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st->decoder = Decoder_Interface_init();
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return (void *)st;
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}
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static void
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codec_amr_exit(void *state)
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{
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struct codec_amr_state *st = state;
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Decoder_Interface_exit(st->decoder);
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Encoder_Interface_exit(st->encoder);
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talloc_free(st);
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return;
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}
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static int
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codec_amr_encode(void *state, uint8_t *cod, const uint8_t *pcm, unsigned int pcm_len)
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{
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struct codec_amr_state *st = state;
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int rv;
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BENCHMARK_START;
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rv = Encoder_Interface_Encode(
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st->encoder,
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MR122,
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(const short*) pcm,
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(unsigned char*) cod,
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1
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);
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BENCHMARK_STOP(CODEC_AMR, 1);
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return rv;
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}
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static int
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codec_amr_decode(void *state, uint8_t *pcm, const uint8_t *cod, unsigned int cod_len)
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{
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struct codec_amr_state *st = state;
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BENCHMARK_START;
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Decoder_Interface_Decode(
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st->decoder,
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(const unsigned char*) cod,
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(short *) pcm,
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0
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);
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BENCHMARK_STOP(CODEC_AMR, 0);
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return PCM_CANON_LEN;
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}
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#endif /* HAVE_OPENCORE_AMRNB */
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const struct osmo_gapk_codec_desc codec_amr_desc = {
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.type = CODEC_AMR,
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.name = "amr",
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.description = "GSM 26.071 Adaptive Multi Rate codec",
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.canon_frame_len = 0,
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#ifdef HAVE_OPENCORE_AMRNB
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.codec_enc_format_type = FMT_AMR_OPENCORE,
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.codec_dec_format_type = FMT_AMR_OPENCORE,
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.codec_init = codec_amr_init,
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.codec_exit = codec_amr_exit,
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.codec_encode = codec_amr_encode,
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.codec_decode = codec_amr_decode,
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#endif
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};
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