yading@11: /*
yading@11:  * Renderware TeXture Dictionary (.txd) demuxer
yading@11:  * Copyright (c) 2007 Ivo van Poorten
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/intreadwrite.h"
yading@11: #include "avformat.h"
yading@11: 
yading@11: #define TXD_FILE            0x16
yading@11: #define TXD_INFO            0x01
yading@11: #define TXD_EXTRA           0x03
yading@11: #define TXD_TEXTURE         0x15
yading@11: #define TXD_TEXTURE_DATA    0x01
yading@11: #define TXD_MARKER          0x1803ffff
yading@11: #define TXD_MARKER2         0x1003ffff
yading@11: 
yading@11: static int txd_probe(AVProbeData * pd) {
yading@11:     if (AV_RL32(pd->buf  ) == TXD_FILE &&
yading@11:        (AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
yading@11:         return AVPROBE_SCORE_MAX;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int txd_read_header(AVFormatContext *s) {
yading@11:     AVStream *st;
yading@11: 
yading@11:     st = avformat_new_stream(s, NULL);
yading@11:     if (!st)
yading@11:         return AVERROR(ENOMEM);
yading@11:     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
yading@11:     st->codec->codec_id = AV_CODEC_ID_TXD;
yading@11:     st->codec->time_base.den = 5;
yading@11:     st->codec->time_base.num = 1;
yading@11:     /* the parameters will be extracted from the compressed bitstream */
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     unsigned int id, chunk_size, marker;
yading@11:     int ret;
yading@11: 
yading@11: next_chunk:
yading@11:     id         = avio_rl32(pb);
yading@11:     chunk_size = avio_rl32(pb);
yading@11:     marker     = avio_rl32(pb);
yading@11: 
yading@11:     if (url_feof(s->pb))
yading@11:         return AVERROR_EOF;
yading@11:     if (marker != TXD_MARKER && marker != TXD_MARKER2) {
yading@11:         av_log(s, AV_LOG_ERROR, "marker does not match\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11: 
yading@11:     switch (id) {
yading@11:     case TXD_INFO:
yading@11:         if (chunk_size > 100)
yading@11:             break;
yading@11:     case TXD_EXTRA:
yading@11:         avio_skip(s->pb, chunk_size);
yading@11:     case TXD_FILE:
yading@11:     case TXD_TEXTURE:
yading@11:         goto next_chunk;
yading@11:     default:
yading@11:         av_log(s, AV_LOG_ERROR, "unknown chunk id %i\n", id);
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11: 
yading@11:     ret = av_get_packet(s->pb, pkt, chunk_size);
yading@11:     if (ret < 0)
yading@11:         return ret;
yading@11:     pkt->stream_index = 0;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVInputFormat ff_txd_demuxer = {
yading@11:     .name        = "txd",
yading@11:     .long_name   = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
yading@11:     .read_probe  = txd_probe,
yading@11:     .read_header = txd_read_header,
yading@11:     .read_packet = txd_read_packet,
yading@11: };