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
26static 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
64AVOutputFormat 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};
73