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100 lines
2.9 KiB
100 lines
2.9 KiB
/* |
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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) { |
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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->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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st->codec->codec_id = AV_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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AVIOContext *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 = avio_rl32(pb); |
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chunk_size = avio_rl32(pb); |
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marker = avio_rl32(pb); |
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if (url_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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} |
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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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avio_skip(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(s, AV_LOG_ERROR, "unknown chunk id %i\n", id); |
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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) |
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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 = { |
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.name = "txd", |
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.long_name = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"), |
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.read_probe = txd_probe, |
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.read_header = txd_read_header, |
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.read_packet = txd_read_packet, |
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};
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