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2ba45a60 DM |
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 | }; |