Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Renderware TeXture Dictionary (.txd) demuxer
  3.  * Copyright (c) 2007 Ivo van Poorten
  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 "libavutil/intreadwrite.h"
  23. #include "avformat.h"
  24. #include "internal.h"
  25.  
  26. #define TXD_FILE            0x16
  27. #define TXD_INFO            0x01
  28. #define TXD_EXTRA           0x03
  29. #define TXD_TEXTURE         0x15
  30. #define TXD_TEXTURE_DATA    0x01
  31. #define TXD_MARKER          0x1803ffff
  32. #define TXD_MARKER2         0x1003ffff
  33.  
  34. static int txd_probe(AVProbeData * pd) {
  35.     if (AV_RL32(pd->buf  ) == TXD_FILE &&
  36.        (AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
  37.         return AVPROBE_SCORE_MAX;
  38.     return 0;
  39. }
  40.  
  41. static int txd_read_header(AVFormatContext *s) {
  42.     AVStream *st;
  43.  
  44.     st = avformat_new_stream(s, NULL);
  45.     if (!st)
  46.         return AVERROR(ENOMEM);
  47.     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
  48.     st->codec->codec_id = AV_CODEC_ID_TXD;
  49.     avpriv_set_pts_info(st, 64, 1, 5);
  50.     st->avg_frame_rate = av_inv_q(st->time_base);
  51.     /* the parameters will be extracted from the compressed bitstream */
  52.  
  53.     return 0;
  54. }
  55.  
  56. static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
  57.     AVIOContext *pb = s->pb;
  58.     unsigned int id, chunk_size, marker;
  59.     int ret;
  60.  
  61. next_chunk:
  62.     id         = avio_rl32(pb);
  63.     chunk_size = avio_rl32(pb);
  64.     marker     = avio_rl32(pb);
  65.  
  66.     if (avio_feof(s->pb))
  67.         return AVERROR_EOF;
  68.     if (marker != TXD_MARKER && marker != TXD_MARKER2) {
  69.         av_log(s, AV_LOG_ERROR, "marker does not match\n");
  70.         return AVERROR_INVALIDDATA;
  71.     }
  72.  
  73.     switch (id) {
  74.     case TXD_INFO:
  75.         if (chunk_size > 100)
  76.             break;
  77.     case TXD_EXTRA:
  78.         avio_skip(s->pb, chunk_size);
  79.     case TXD_FILE:
  80.     case TXD_TEXTURE:
  81.         goto next_chunk;
  82.     default:
  83.         av_log(s, AV_LOG_ERROR, "unknown chunk id %i\n", id);
  84.         return AVERROR_INVALIDDATA;
  85.     }
  86.  
  87.     ret = av_get_packet(s->pb, pkt, chunk_size);
  88.     if (ret < 0)
  89.         return ret;
  90.     pkt->stream_index = 0;
  91.  
  92.     return 0;
  93. }
  94.  
  95. AVInputFormat ff_txd_demuxer = {
  96.     .name        = "txd",
  97.     .long_name   = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
  98.     .read_probe  = txd_probe,
  99.     .read_header = txd_read_header,
  100.     .read_packet = txd_read_packet,
  101. };
  102.