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 34static 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 41static 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 56static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) { 57 AVIOContext *pb = s->pb; 58 unsigned int id, chunk_size, marker; 59 int ret; 60 61next_chunk: 62 id = avio_rl32(pb); 63 chunk_size = avio_rl32(pb); 64 marker = avio_rl32(pb); 65 66 if (url_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 95AVInputFormat 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