0,0 → 1,100 |
/* |
* 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) { |
AVStream *st; |
|
st = avformat_new_stream(s, NULL); |
if (!st) |
return AVERROR(ENOMEM); |
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
st->codec->codec_id = AV_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 = { |
.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, |
}; |