LCOV - code coverage report
Current view: top level - libavformat - txd.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 33 40 82.5 %
Date: 2017-12-14 01:15:32 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Renderware TeXture Dictionary (.txd) demuxer
       3             :  * Copyright (c) 2007 Ivo van Poorten
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/intreadwrite.h"
      23             : #include "avformat.h"
      24             : #include "internal.h"
      25             : 
      26             : #define TXD_FILE            0x16
      27             : #define TXD_INFO            0x01
      28             : #define TXD_EXTRA           0x03
      29             : #define TXD_TEXTURE         0x15
      30             : #define TXD_TEXTURE_DATA    0x01
      31             : #define TXD_MARKER          0x1803ffff
      32             : #define TXD_MARKER2         0x1003ffff
      33             : 
      34        6130 : static int txd_probe(AVProbeData * pd) {
      35        6133 :     if (AV_RL32(pd->buf  ) == TXD_FILE &&
      36           4 :        (AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
      37           3 :         return AVPROBE_SCORE_MAX;
      38        6127 :     return 0;
      39             : }
      40             : 
      41           3 : static int txd_read_header(AVFormatContext *s) {
      42             :     AVStream *st;
      43             : 
      44           3 :     st = avformat_new_stream(s, NULL);
      45           3 :     if (!st)
      46           0 :         return AVERROR(ENOMEM);
      47           3 :     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
      48           3 :     st->codecpar->codec_id = AV_CODEC_ID_TXD;
      49           3 :     avpriv_set_pts_info(st, 64, 1, 5);
      50           3 :     st->avg_frame_rate = av_inv_q(st->time_base);
      51             :     /* the parameters will be extracted from the compressed bitstream */
      52             : 
      53           3 :     return 0;
      54             : }
      55             : 
      56          19 : static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
      57          19 :     AVIOContext *pb = s->pb;
      58             :     unsigned int id, chunk_size, marker;
      59             :     int ret;
      60             : 
      61          54 : next_chunk:
      62          54 :     id         = avio_rl32(pb);
      63          54 :     chunk_size = avio_rl32(pb);
      64          54 :     marker     = avio_rl32(pb);
      65             : 
      66          54 :     if (avio_feof(s->pb))
      67           6 :         return AVERROR_EOF;
      68          48 :     if (marker != TXD_MARKER && marker != TXD_MARKER2) {
      69           0 :         av_log(s, AV_LOG_ERROR, "marker does not match\n");
      70           0 :         return AVERROR_INVALIDDATA;
      71             :     }
      72             : 
      73          48 :     switch (id) {
      74          16 :     case TXD_INFO:
      75          16 :         if (chunk_size > 100)
      76          13 :             break;
      77             :     case TXD_EXTRA:
      78          19 :         avio_skip(s->pb, chunk_size);
      79          35 :     case TXD_FILE:
      80             :     case TXD_TEXTURE:
      81          35 :         goto next_chunk;
      82           0 :     default:
      83           0 :         av_log(s, AV_LOG_ERROR, "unknown chunk id %i\n", id);
      84           0 :         return AVERROR_INVALIDDATA;
      85             :     }
      86             : 
      87          13 :     ret = av_get_packet(s->pb, pkt, chunk_size);
      88          13 :     if (ret < 0)
      89           0 :         return ret;
      90          13 :     pkt->stream_index = 0;
      91             : 
      92          13 :     return 0;
      93             : }
      94             : 
      95             : AVInputFormat ff_txd_demuxer = {
      96             :     .name        = "txd",
      97             :     .long_name   = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
      98             :     .read_probe  = txd_probe,
      99             :     .read_header = txd_read_header,
     100             :     .read_packet = txd_read_packet,
     101             : };

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