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https://github.com/FFmpeg/FFmpeg.git
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b800327f4c
This commit does for AVInputFormat what commit59c9dc82f4did for AVOutputFormat: It adds a new type FFInputFormat, moves all the internals of AVInputFormat to it and adds a now reduced AVInputFormat as first member. This does not affect/improve extensibility of both public or private fields for demuxers (it is still a mess due to lavd). This is possible since50f34172e0(which removed the last usage of an internal field of AVInputFormat in fftools). (Hint: tools/probetest.c accesses the internals of FFInputFormat as well, but given that it is a testing tool this is not considered a problem.) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
103 lines
2.9 KiB
C
103 lines
2.9 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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#include "demux.h"
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#include "internal.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(const 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->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_TXD;
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avpriv_set_pts_info(st, 64, 1, 5);
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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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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 (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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}
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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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const FFInputFormat ff_txd_demuxer = {
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.p.name = "txd",
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.p.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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