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  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. };
  73.