diff options
author | Anton Khirnov <anton@khirnov.net> | 2014-04-17 14:51:03 +0400 |
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committer | Anton Khirnov <anton@khirnov.net> | 2014-05-15 08:49:34 +0400 |
commit | b70d7a4ac72d23f3448f3b08b770fdf5f57de222 (patch) | |
tree | 5227a8698a1499744632d0c029d91200f5007520 /libavcodec/opus_parser.c | |
parent | 7e90133f6420b1c53652f972b9561600822881ee (diff) |
lavc: add a native Opus decoder.
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>
Diffstat (limited to 'libavcodec/opus_parser.c')
-rw-r--r-- | libavcodec/opus_parser.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/libavcodec/opus_parser.c b/libavcodec/opus_parser.c new file mode 100644 index 0000000000..8a2bc22043 --- /dev/null +++ b/libavcodec/opus_parser.c @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2013-2014 Mozilla Corporation + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Opus parser + * + * Determines the duration for each packet. + */ + +#include "avcodec.h" +#include "opus.h" + +typedef struct OpusParseContext { + OpusContext ctx; + OpusPacket pkt; + int extradata_parsed; +} OpusParseContext; + +static int opus_parse(AVCodecParserContext *ctx, AVCodecContext *avctx, + const uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size) +{ + OpusParseContext *s = ctx->priv_data; + int ret; + + if (!buf_size) + return 0; + + if (avctx->extradata && !s->extradata_parsed) { + ret = ff_opus_parse_extradata(avctx, &s->ctx); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "Error parsing Ogg extradata.\n"); + goto fail; + } + av_freep(&s->ctx.channel_maps); + s->extradata_parsed = 1; + } + + ret = ff_opus_parse_packet(&s->pkt, buf, buf_size, s->ctx.nb_streams > 1); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "Error parsing Opus packet header.\n"); + goto fail; + } + + ctx->duration = s->pkt.frame_count * s->pkt.frame_duration; + +fail: + *poutbuf = buf; + *poutbuf_size = buf_size; + return buf_size; +} + +AVCodecParser ff_opus_parser = { + .codec_ids = { AV_CODEC_ID_OPUS }, + .priv_data_size = sizeof(OpusParseContext), + .parser_parse = opus_parse, +}; |