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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
*/
|
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#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;
}
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static int txd_read_header(AVFormatContext *s) { |
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AVStream *st;
|
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st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = AV_CODEC_ID_TXD; |
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avpriv_set_pts_info(st, 64, 1, 5);
st->avg_frame_rate = av_inv_q(st->time_base); |
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/* the parameters will be extracted from the compressed bitstream */ |
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|
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return 0;
}
static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) { |
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AVIOContext *pb = s->pb; |
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unsigned int id, chunk_size, marker;
int ret;
next_chunk: |
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id = avio_rl32(pb);
chunk_size = avio_rl32(pb);
marker = avio_rl32(pb); |
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|
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if (avio_feof(s->pb)) |
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return AVERROR_EOF; |
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if (marker != TXD_MARKER && marker != TXD_MARKER2) { |
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av_log(s, AV_LOG_ERROR, "marker does not match\n"); |
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return AVERROR_INVALIDDATA; |
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}
switch (id) { |
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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; |
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}
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ret = av_get_packet(s->pb, pkt, chunk_size); |
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if (ret < 0)
return ret; |
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pkt->stream_index = 0;
|
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return 0; |
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}
|
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AVInputFormat ff_txd_demuxer = {
.name = "txd",
.long_name = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
.read_probe = txd_probe,
.read_header = txd_read_header,
.read_packet = txd_read_packet, |
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}; |