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https://git.ffmpeg.org/ffmpeg.git
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100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/*
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* Renderware TeXture Dictionary (.txd) demuxer
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* Copyright (c) 2007 Ivo van Poorten
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#define TXD_FILE 0x16
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#define TXD_INFO 0x01
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#define TXD_EXTRA 0x03
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#define TXD_TEXTURE 0x15
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#define TXD_TEXTURE_DATA 0x01
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#define TXD_MARKER 0x1803ffff
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#define TXD_MARKER2 0x1003ffff
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static int txd_probe(AVProbeData * pd) {
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if (AV_RL32(pd->buf ) == TXD_FILE &&
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(AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int txd_read_header(AVFormatContext *s, AVFormatParameters *ap) {
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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st->codec->codec_id = CODEC_ID_TXD;
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st->codec->time_base.den = 5;
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st->codec->time_base.num = 1;
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/* the parameters will be extracted from the compressed bitstream */
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return 0;
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}
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static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
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ByteIOContext *pb = s->pb;
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unsigned int id, chunk_size, marker;
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int ret;
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next_chunk:
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id = get_le32(pb);
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chunk_size = get_le32(pb);
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marker = get_le32(pb);
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if (url_feof(s->pb))
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return AVERROR(EIO);
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if (marker != TXD_MARKER && marker != TXD_MARKER2) {
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av_log(NULL, AV_LOG_ERROR, "marker does not match\n");
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return AVERROR(EIO);
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}
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switch (id) {
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case TXD_INFO:
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if (chunk_size > 100)
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break;
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case TXD_EXTRA:
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url_fskip(s->pb, chunk_size);
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case TXD_FILE:
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case TXD_TEXTURE:
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goto next_chunk;
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default:
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av_log(NULL, AV_LOG_ERROR, "unknown chunk id %i\n", id);
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return AVERROR(EIO);
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}
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ret = av_get_packet(s->pb, pkt, chunk_size);
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pkt->stream_index = 0;
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return ret <= 0 ? AVERROR(EIO) : ret;
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}
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AVInputFormat txd_demuxer =
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{
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"txd",
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NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
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0,
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txd_probe,
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txd_read_header,
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txd_read_packet,
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};
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