| 1 | /* |
| 2 | * Copyright (c) 2013-2014 Mozilla Corporation |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * @file |
| 23 | * Opus parser |
| 24 | * |
| 25 | * Determines the duration for each packet. |
| 26 | */ |
| 27 | |
| 28 | #include "avcodec.h" |
| 29 | #include "opus.h" |
| 30 | |
| 31 | typedef struct OpusParseContext { |
| 32 | OpusContext ctx; |
| 33 | OpusPacket pkt; |
| 34 | int extradata_parsed; |
| 35 | } OpusParseContext; |
| 36 | |
| 37 | static int opus_parse(AVCodecParserContext *ctx, AVCodecContext *avctx, |
| 38 | const uint8_t **poutbuf, int *poutbuf_size, |
| 39 | const uint8_t *buf, int buf_size) |
| 40 | { |
| 41 | OpusParseContext *s = ctx->priv_data; |
| 42 | int ret; |
| 43 | |
| 44 | if (!buf_size) |
| 45 | return 0; |
| 46 | |
| 47 | if (avctx->extradata && !s->extradata_parsed) { |
| 48 | ret = ff_opus_parse_extradata(avctx, &s->ctx); |
| 49 | if (ret < 0) { |
| 50 | av_log(avctx, AV_LOG_ERROR, "Error parsing Ogg extradata.\n"); |
| 51 | goto fail; |
| 52 | } |
| 53 | av_freep(&s->ctx.channel_maps); |
| 54 | s->extradata_parsed = 1; |
| 55 | } |
| 56 | |
| 57 | ret = ff_opus_parse_packet(&s->pkt, buf, buf_size, s->ctx.nb_streams > 1); |
| 58 | if (ret < 0) { |
| 59 | av_log(avctx, AV_LOG_ERROR, "Error parsing Opus packet header.\n"); |
| 60 | goto fail; |
| 61 | } |
| 62 | |
| 63 | ctx->duration = s->pkt.frame_count * s->pkt.frame_duration; |
| 64 | |
| 65 | fail: |
| 66 | *poutbuf = buf; |
| 67 | *poutbuf_size = buf_size; |
| 68 | return buf_size; |
| 69 | } |
| 70 | |
| 71 | AVCodecParser ff_opus_parser = { |
| 72 | .codec_ids = { AV_CODEC_ID_OPUS }, |
| 73 | .priv_data_size = sizeof(OpusParseContext), |
| 74 | .parser_parse = opus_parse, |
| 75 | }; |