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
roq_write_header(struct AVFormatContext * s)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
33 // set the actual fps
34 for(n=0;n<s->nb_streams;n++) {
35 if (s->streams[n]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
36 unsigned int fps;
37
38 if (s->streams[n]->avg_frame_rate.den != 1) {
39 av_log(s, AV_LOG_ERROR, "Frame rate must be integer\n");
40 return AVERROR(EINVAL);
41 }
42
43 if ((fps=s->streams[n]->avg_frame_rate.num) > 255) {
44 av_log(s, AV_LOG_ERROR, "Frame rate may not exceed 255fps\n");
45 return AVERROR(EINVAL);
46 }
47
48 if (fps != 30) {
49 av_log(s, AV_LOG_WARNING, "For vintage compatibility fps must be 30\n");
50 }
51
52 header[6] = fps;
53 break;
54 }
55 }
56
57 avio_write(s->pb, header, 8);
58
59 return 0;
60 }
61
62 AVOutputFormat ff_roq_muxer = {
63 .name = "roq",
64 .long_name = NULL_IF_CONFIG_SMALL("raw id RoQ"),
65 .extensions = "roq",
66 .audio_codec = AV_CODEC_ID_ROQ_DPCM,
67 .video_codec = AV_CODEC_ID_ROQ,
68 .write_header = roq_write_header,
69 .write_packet = ff_raw_write_packet,
70 };
71