LCOV - code coverage report
Current view: top level - libavformat - xvag.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 52 5.8 %
Date: 2017-12-12 11:08:38 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * XVAG 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/bswap.h"
      23             : #include "libavcodec/internal.h"
      24             : #include "avformat.h"
      25             : #include "internal.h"
      26             : 
      27        6130 : static int xvag_probe(AVProbeData *p)
      28             : {
      29        6130 :     if (memcmp(p->buf, "XVAG", 4) ||
      30           0 :         memcmp(p->buf+32, "fmat", 4))
      31        6130 :         return 0;
      32             : 
      33           0 :     return AVPROBE_SCORE_MAX;
      34             : }
      35             : 
      36           0 : static int xvag_read_header(AVFormatContext *s)
      37             : {
      38             :     unsigned offset, big_endian, codec;
      39             :     AVStream *st;
      40             : 
      41           0 :     avio_skip(s->pb, 4);
      42             : 
      43           0 :     st = avformat_new_stream(s, NULL);
      44           0 :     if (!st)
      45           0 :         return AVERROR(ENOMEM);
      46             : 
      47           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      48             : 
      49           0 :     offset     = avio_rl32(s->pb);
      50           0 :     big_endian = offset > av_bswap32(offset);
      51           0 :     if (big_endian) {
      52           0 :         offset                 = av_bswap32(offset);
      53           0 :         avio_skip(s->pb, 28);
      54           0 :         codec                  = avio_rb32(s->pb);
      55           0 :         st->codecpar->channels = avio_rb32(s->pb);
      56           0 :         avio_skip(s->pb, 4);
      57           0 :         st->duration           = avio_rb32(s->pb);
      58           0 :         avio_skip(s->pb, 8);
      59           0 :         st->codecpar->sample_rate = avio_rb32(s->pb);
      60             :     } else {
      61           0 :         avio_skip(s->pb, 28);
      62           0 :         codec                  = avio_rl32(s->pb);
      63           0 :         st->codecpar->channels = avio_rl32(s->pb);
      64           0 :         avio_skip(s->pb, 4);
      65           0 :         st->duration           = avio_rl32(s->pb);
      66           0 :         avio_skip(s->pb, 8);
      67           0 :         st->codecpar->sample_rate = avio_rl32(s->pb);
      68             :     }
      69             : 
      70           0 :     if (st->codecpar->sample_rate <= 0)
      71           0 :         return AVERROR_INVALIDDATA;
      72           0 :     if (st->codecpar->channels <= 0 || st->codecpar->channels > FF_SANE_NB_CHANNELS)
      73           0 :         return AVERROR_INVALIDDATA;
      74             : 
      75           0 :     switch (codec) {
      76           0 :     case 0x1c:
      77           0 :         st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_PSX;
      78           0 :         st->codecpar->block_align = 16 * st->codecpar->channels;
      79           0 :         break;
      80           0 :     default:
      81           0 :         avpriv_request_sample(s, "codec %X", codec);
      82           0 :         return AVERROR_PATCHWELCOME;
      83             :     };
      84             : 
      85           0 :     avio_skip(s->pb, offset - avio_tell(s->pb));
      86             : 
      87           0 :     if (avio_rb16(s->pb) == 0xFFFB) {
      88           0 :         st->codecpar->codec_id    = AV_CODEC_ID_MP3;
      89           0 :         st->codecpar->block_align = 0x1000;
      90           0 :         st->need_parsing       = AVSTREAM_PARSE_FULL_RAW;
      91             :     }
      92             : 
      93           0 :     avio_skip(s->pb, -2);
      94           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      95             : 
      96           0 :     return 0;
      97             : }
      98             : 
      99           0 : static int xvag_read_packet(AVFormatContext *s, AVPacket *pkt)
     100             : {
     101           0 :     AVCodecParameters *par = s->streams[0]->codecpar;
     102             : 
     103           0 :     return av_get_packet(s->pb, pkt, par->block_align);
     104             : }
     105             : 
     106             : AVInputFormat ff_xvag_demuxer = {
     107             :     .name           = "xvag",
     108             :     .long_name      = NULL_IF_CONFIG_SMALL("Sony PS3 XVAG"),
     109             :     .read_probe     = xvag_probe,
     110             :     .read_header    = xvag_read_header,
     111             :     .read_packet    = xvag_read_packet,
     112             :     .extensions     = "xvag",
     113             : };

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