LCOV - code coverage report
Current view: top level - libavformat - mtaf.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 28 17.9 %
Date: 2017-12-11 04:34:20 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * MTAF demuxer
       3             :  * Copyright (c) 2016 Paul B Mahol
       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/channel_layout.h"
      23             : #include "libavutil/intreadwrite.h"
      24             : #include "avformat.h"
      25             : #include "internal.h"
      26             : 
      27        6130 : static int mtaf_probe(AVProbeData *p)
      28             : {
      29        6130 :     if (p->buf_size < 0x44)
      30           2 :         return 0;
      31             : 
      32        6128 :     if (AV_RL32(p->buf) != MKTAG('M','T','A','F') ||
      33           0 :         AV_RL32(p->buf + 0x40) != MKTAG('H','E','A','D'))
      34        6128 :         return 0;
      35             : 
      36           0 :     return AVPROBE_SCORE_MAX;
      37             : }
      38             : 
      39           0 : static int mtaf_read_header(AVFormatContext *s)
      40             : {
      41             :     int stream_count;
      42             :     AVStream *st;
      43             : 
      44           0 :     st = avformat_new_stream(s, NULL);
      45           0 :     if (!st)
      46           0 :         return AVERROR(ENOMEM);
      47             : 
      48           0 :     avio_skip(s->pb, 0x5c);
      49           0 :     st->duration = avio_rl32(s->pb);
      50           0 :     avio_skip(s->pb, 1);
      51           0 :     stream_count = avio_r8(s->pb);
      52           0 :     if (!stream_count)
      53           0 :         return AVERROR_INVALIDDATA;
      54             : 
      55           0 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      56           0 :     st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_MTAF;
      57           0 :     st->codecpar->channels    = 2 * stream_count;
      58           0 :     st->codecpar->sample_rate = 48000;
      59           0 :     st->codecpar->block_align = 0x110 * st->codecpar->channels / 2;
      60           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      61             : 
      62           0 :     avio_seek(s->pb, 0x800, SEEK_SET);
      63             : 
      64           0 :     return 0;
      65             : }
      66             : 
      67           0 : static int mtaf_read_packet(AVFormatContext *s, AVPacket *pkt)
      68             : {
      69           0 :     AVCodecParameters *par = s->streams[0]->codecpar;
      70             : 
      71           0 :     return av_get_packet(s->pb, pkt, par->block_align);
      72             : }
      73             : 
      74             : AVInputFormat ff_mtaf_demuxer = {
      75             :     .name           = "mtaf",
      76             :     .long_name      = NULL_IF_CONFIG_SMALL("Konami PS2 MTAF"),
      77             :     .read_probe     = mtaf_probe,
      78             :     .read_header    = mtaf_read_header,
      79             :     .read_packet    = mtaf_read_packet,
      80             :     .extensions     = "mtaf",
      81             : };

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