| /* |
| * Copyright (c) 2013-2014 Mozilla Corporation |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; 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, |
| }; |