LCOV - code coverage report
Current view: top level - libavformat - vag.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 31 9.7 %
Date: 2017-12-15 11:05:35 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * VAG demuxer
       3             :  * Copyright (c) 2015 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 "avformat.h"
      24             : #include "internal.h"
      25             : 
      26        6130 : static int vag_probe(AVProbeData *p)
      27             : {
      28        6130 :     if (memcmp(p->buf, "VAGp\0\0\0", 7))
      29        6130 :         return 0;
      30             : 
      31           0 :     return AVPROBE_SCORE_MAX;
      32             : }
      33             : 
      34           0 : static int vag_read_header(AVFormatContext *s)
      35             : {
      36             :     AVStream *st;
      37             : 
      38           0 :     st = avformat_new_stream(s, NULL);
      39           0 :     if (!st)
      40           0 :         return AVERROR(ENOMEM);
      41             : 
      42           0 :     avio_skip(s->pb, 4);
      43           0 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      44           0 :     st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_PSX;
      45           0 :     st->codecpar->channels    = 1 + (avio_rb32(s->pb) == 0x00000004);
      46           0 :     avio_skip(s->pb, 4);
      47           0 :     if (st->codecpar->channels > 1) {
      48           0 :         st->duration       = avio_rb32(s->pb);
      49             :     } else {
      50           0 :         st->duration       = avio_rb32(s->pb) / 16 * 28;
      51             :     }
      52           0 :     st->codecpar->sample_rate = avio_rb32(s->pb);
      53           0 :     if (st->codecpar->sample_rate <= 0)
      54           0 :         return AVERROR_INVALIDDATA;
      55           0 :     avio_seek(s->pb, 0x1000, SEEK_SET);
      56           0 :     if (avio_rl32(s->pb) == MKTAG('V','A','G','p')) {
      57           0 :         st->codecpar->block_align = 0x1000 * st->codecpar->channels;
      58           0 :         avio_seek(s->pb, 0, SEEK_SET);
      59           0 :         st->duration = st->duration / 16 * 28;
      60             :     } else {
      61           0 :         st->codecpar->block_align = 16 * st->codecpar->channels;
      62           0 :         avio_seek(s->pb, st->codecpar->channels > 1 ? 0x80 : 0x30, SEEK_SET);
      63             :     }
      64           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      65             : 
      66           0 :     return 0;
      67             : }
      68             : 
      69           0 : static int vag_read_packet(AVFormatContext *s, AVPacket *pkt)
      70             : {
      71           0 :     AVCodecParameters *par = s->streams[0]->codecpar;
      72             : 
      73           0 :     return av_get_packet(s->pb, pkt, par->block_align);
      74             : }
      75             : 
      76             : AVInputFormat ff_vag_demuxer = {
      77             :     .name           = "vag",
      78             :     .long_name      = NULL_IF_CONFIG_SMALL("Sony PS2 VAG"),
      79             :     .read_probe     = vag_probe,
      80             :     .read_header    = vag_read_header,
      81             :     .read_packet    = vag_read_packet,
      82             :     .extensions     = "vag",
      83             : };

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