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