b70d7a4ac7
Initial implementation by Andrew D'Addesio <modchipv12@gmail.com> during GSoC 2012. Completion by Anton Khirnov <anton@khirnov.net>, sponsored by the Mozilla Corporation. Further contributions by: Christophe Gisquet <christophe.gisquet@gmail.com> Janne Grunau <janne-libav@jannau.net> Luca Barbato <lu_zero@gentoo.org>
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/*
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* Copyright (c) 2013-2014 Mozilla Corporation
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Opus parser
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*
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* Determines the duration for each packet.
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*/
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#include "avcodec.h"
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#include "opus.h"
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typedef struct OpusParseContext {
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OpusContext ctx;
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OpusPacket pkt;
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int extradata_parsed;
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} OpusParseContext;
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static int opus_parse(AVCodecParserContext *ctx, AVCodecContext *avctx,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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OpusParseContext *s = ctx->priv_data;
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int ret;
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if (!buf_size)
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return 0;
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if (avctx->extradata && !s->extradata_parsed) {
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ret = ff_opus_parse_extradata(avctx, &s->ctx);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error parsing Ogg extradata.\n");
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goto fail;
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}
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av_freep(&s->ctx.channel_maps);
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s->extradata_parsed = 1;
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}
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ret = ff_opus_parse_packet(&s->pkt, buf, buf_size, s->ctx.nb_streams > 1);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error parsing Opus packet header.\n");
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goto fail;
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}
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ctx->duration = s->pkt.frame_count * s->pkt.frame_duration;
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fail:
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*poutbuf = buf;
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*poutbuf_size = buf_size;
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return buf_size;
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}
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AVCodecParser ff_opus_parser = {
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.codec_ids = { AV_CODEC_ID_OPUS },
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.priv_data_size = sizeof(OpusParseContext),
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.parser_parse = opus_parse,
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};
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