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2ba45a60 DM |
1 | /* |
2 | * id RoQ (.roq) File muxer | |
3 | * Copyright (c) 2007 Vitor Sessak | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include "avformat.h" | |
23 | #include "rawenc.h" | |
24 | ||
25 | ||
26 | static int roq_write_header(struct AVFormatContext *s) | |
27 | { | |
28 | uint8_t header[] = { | |
29 | 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, /* fps: */ 0x1E, 0x00 | |
30 | }; | |
31 | int n; | |
32 | AVCodecContext *avctx; | |
33 | ||
34 | // set the actual fps | |
35 | for(n=0;n<s->nb_streams;n++) { | |
36 | if ((avctx=s->streams[n]->codec)->codec_type == AVMEDIA_TYPE_VIDEO) { | |
37 | unsigned int fps; | |
38 | ||
39 | if (avctx->time_base.num != 1) { | |
40 | av_log(avctx, AV_LOG_ERROR, "Frame rate must be integer\n"); | |
41 | return AVERROR(EINVAL); | |
42 | } | |
43 | ||
44 | if ((fps=avctx->time_base.den) > 255) { | |
45 | av_log(avctx, AV_LOG_ERROR, "Frame rate may not exceed 255fps\n"); | |
46 | return AVERROR(EINVAL); | |
47 | } | |
48 | ||
49 | if (fps != 30) { | |
50 | av_log(avctx, AV_LOG_WARNING, "For vintage compatibility fps must be 30\n"); | |
51 | } | |
52 | ||
53 | header[6] = fps; | |
54 | break; | |
55 | } | |
56 | } | |
57 | ||
58 | avio_write(s->pb, header, 8); | |
59 | avio_flush(s->pb); | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | AVOutputFormat ff_roq_muxer = { | |
65 | .name = "roq", | |
66 | .long_name = NULL_IF_CONFIG_SMALL("raw id RoQ"), | |
67 | .extensions = "roq", | |
68 | .audio_codec = AV_CODEC_ID_ROQ_DPCM, | |
69 | .video_codec = AV_CODEC_ID_ROQ, | |
70 | .write_header = roq_write_header, | |
71 | .write_packet = ff_raw_write_packet, | |
72 | }; |