Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Adobe Filmstrip muxer
  3.  * Copyright (c) 2010 Peter Ross
  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. /**
  23.  * @file
  24.  * Adobe Filmstrip muxer
  25.  */
  26.  
  27. #include "libavutil/intreadwrite.h"
  28. #include "avformat.h"
  29.  
  30. #define RAND_TAG MKBETAG('R','a','n','d')
  31.  
  32. typedef struct {
  33.     int nb_frames;
  34. } FilmstripMuxContext;
  35.  
  36. static int write_header(AVFormatContext *s)
  37. {
  38.     if (s->streams[0]->codec->pix_fmt != AV_PIX_FMT_RGBA) {
  39.         av_log(s, AV_LOG_ERROR, "only AV_PIX_FMT_RGBA is supported\n");
  40.         return AVERROR_INVALIDDATA;
  41.     }
  42.     return 0;
  43. }
  44.  
  45. static int write_packet(AVFormatContext *s, AVPacket *pkt)
  46. {
  47.     FilmstripMuxContext *film = s->priv_data;
  48.     avio_write(s->pb, pkt->data, pkt->size);
  49.     film->nb_frames++;
  50.     return 0;
  51. }
  52.  
  53. static int write_trailer(AVFormatContext *s)
  54. {
  55.     FilmstripMuxContext *film = s->priv_data;
  56.     AVIOContext *pb = s->pb;
  57.     AVStream *st = s->streams[0];
  58.     int i;
  59.  
  60.     avio_wb32(pb, RAND_TAG);
  61.     avio_wb32(pb, film->nb_frames);
  62.     avio_wb16(pb, 0);  // packing method
  63.     avio_wb16(pb, 0);  // reserved
  64.     avio_wb16(pb, st->codec->width);
  65.     avio_wb16(pb, st->codec->height);
  66.     avio_wb16(pb, 0);  // leading
  67.     avio_wb16(pb, st->codec->time_base.den / st->codec->time_base.num);
  68.     for (i = 0; i < 16; i++)
  69.         avio_w8(pb, 0x00);  // reserved
  70.  
  71.     return 0;
  72. }
  73.  
  74. AVOutputFormat ff_filmstrip_muxer = {
  75.     .name              = "filmstrip",
  76.     .long_name         = NULL_IF_CONFIG_SMALL("Adobe Filmstrip"),
  77.     .extensions        = "flm",
  78.     .priv_data_size    = sizeof(FilmstripMuxContext),
  79.     .audio_codec       = AV_CODEC_ID_NONE,
  80.     .video_codec       = AV_CODEC_ID_RAWVIDEO,
  81.     .write_header      = write_header,
  82.     .write_packet      = write_packet,
  83.     .write_trailer     = write_trailer,
  84. };
  85.