LCOV - code coverage report
Current view: top level - libavformat - musx.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 116 2.6 %
Date: 2017-12-12 03:56:30 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * MUSX 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/avassert.h"
      23             : #include "avformat.h"
      24             : #include "internal.h"
      25             : 
      26        6130 : static int musx_probe(AVProbeData *p)
      27             : {
      28        6130 :     if (memcmp(p->buf, "MUSX", 4))
      29        6130 :         return 0;
      30             : 
      31           0 :     return AVPROBE_SCORE_MAX / 5 * 2;
      32             : }
      33             : 
      34           0 : static int musx_read_header(AVFormatContext *s)
      35             : {
      36             :     unsigned type, version, coding, offset;
      37             :     AVStream *st;
      38             : 
      39           0 :     avio_skip(s->pb, 8);
      40           0 :     version = avio_rl32(s->pb);
      41           0 :     if (version != 10 &&
      42           0 :         version != 6 &&
      43           0 :         version != 5 &&
      44           0 :         version != 4 &&
      45             :         version != 201) {
      46           0 :         avpriv_request_sample(s, "Unsupported version: %d", version);
      47           0 :         return AVERROR_PATCHWELCOME;
      48             :     }
      49           0 :     avio_skip(s->pb, 4);
      50             : 
      51           0 :     st = avformat_new_stream(s, NULL);
      52           0 :     if (!st)
      53           0 :         return AVERROR(ENOMEM);
      54             : 
      55           0 :     if (version == 201) {
      56           0 :         avio_skip(s->pb, 8);
      57           0 :         offset = avio_rl32(s->pb);
      58           0 :         st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      59           0 :         st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_PSX;
      60           0 :         st->codecpar->channels    = 2;
      61           0 :         st->codecpar->sample_rate = 32000;
      62           0 :         st->codecpar->block_align = 0x80 * st->codecpar->channels;
      63           0 :     }  else if (version == 10) {
      64           0 :         type = avio_rl32(s->pb);
      65           0 :         st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      66           0 :         offset = 0x800;
      67           0 :         switch (type) {
      68           0 :         case MKTAG('P', 'S', '3', '_'):
      69           0 :             st->codecpar->channels    = 2;
      70           0 :             st->codecpar->sample_rate = 44100;
      71           0 :             avio_skip(s->pb, 44);
      72           0 :             coding = avio_rl32(s->pb);
      73           0 :             if (coding == MKTAG('D', 'A', 'T', '4') ||
      74             :                 coding == MKTAG('D', 'A', 'T', '8')) {
      75           0 :                 avio_skip(s->pb, 4);
      76           0 :                 st->codecpar->channels   = avio_rl32(s->pb);
      77           0 :                 if (st->codecpar->channels <= 0 ||
      78           0 :                     st->codecpar->channels > INT_MAX / 0x20)
      79           0 :                     return AVERROR_INVALIDDATA;
      80           0 :                 st->codecpar->sample_rate = avio_rl32(s->pb);
      81             :             }
      82           0 :             st->codecpar->codec_id   = AV_CODEC_ID_ADPCM_IMA_DAT4;
      83           0 :             st->codecpar->block_align = 0x20 * st->codecpar->channels;
      84           0 :             break;
      85           0 :         case MKTAG('W', 'I', 'I', '_'):
      86           0 :             avio_skip(s->pb, 44);
      87           0 :             coding = avio_rl32(s->pb);
      88           0 :             if (coding != MKTAG('D', 'A', 'T', '4') &&
      89             :                 coding != MKTAG('D', 'A', 'T', '8')) {
      90           0 :                 avpriv_request_sample(s, "Unsupported coding: %X", coding);
      91           0 :                 return AVERROR_PATCHWELCOME;
      92             :             }
      93           0 :             avio_skip(s->pb, 4);
      94           0 :             st->codecpar->codec_id   = AV_CODEC_ID_ADPCM_IMA_DAT4;
      95           0 :             st->codecpar->channels   = avio_rl32(s->pb);
      96           0 :             if (st->codecpar->channels <= 0 ||
      97           0 :                 st->codecpar->channels > INT_MAX / 0x20)
      98           0 :                 return AVERROR_INVALIDDATA;
      99           0 :             st->codecpar->sample_rate = avio_rl32(s->pb);
     100           0 :             st->codecpar->block_align = 0x20 * st->codecpar->channels;
     101           0 :             break;
     102           0 :         case MKTAG('X', 'E', '_', '_'):
     103           0 :             st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_IMA_DAT4;
     104           0 :             st->codecpar->channels    = 2;
     105           0 :             st->codecpar->sample_rate = 32000;
     106           0 :             st->codecpar->block_align = 0x20 * st->codecpar->channels;
     107           0 :             break;
     108           0 :         case MKTAG('P', 'S', 'P', '_'):
     109           0 :             st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_PSX;
     110           0 :             st->codecpar->channels    = 2;
     111           0 :             st->codecpar->sample_rate = 32768;
     112           0 :             st->codecpar->block_align = 0x80 * st->codecpar->channels;
     113           0 :             break;
     114           0 :         case MKTAG('P', 'S', '2', '_'):
     115           0 :             st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_PSX;
     116           0 :             st->codecpar->channels    = 2;
     117           0 :             st->codecpar->sample_rate = 32000;
     118           0 :             st->codecpar->block_align = 0x80 * st->codecpar->channels;
     119           0 :             break;
     120           0 :         default:
     121           0 :             avpriv_request_sample(s, "Unsupported type: %X", type);
     122           0 :             return AVERROR_PATCHWELCOME;
     123             :         }
     124           0 :     } else if (version == 6 || version == 5 || version == 4) {
     125           0 :         type = avio_rl32(s->pb);
     126           0 :         avio_skip(s->pb, 20);
     127           0 :         st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
     128           0 :         st->codecpar->channels    = 2;
     129           0 :         switch (type) {
     130           0 :         case MKTAG('G', 'C', '_', '_'):
     131           0 :             st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_IMA_DAT4;
     132           0 :             st->codecpar->block_align = 0x20 * st->codecpar->channels;
     133           0 :             st->codecpar->sample_rate = 32000;
     134           0 :             offset = avio_rb32(s->pb);
     135           0 :             break;
     136           0 :         case MKTAG('P', 'S', '2', '_'):
     137           0 :             st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_PSX;
     138           0 :             st->codecpar->block_align = 0x80 * st->codecpar->channels;
     139           0 :             st->codecpar->sample_rate = 32000;
     140           0 :             offset = avio_rl32(s->pb);
     141           0 :             break;
     142           0 :         case MKTAG('X', 'B', '_', '_'):
     143           0 :             st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_IMA_DAT4;
     144           0 :             st->codecpar->block_align = 0x20 * st->codecpar->channels;
     145           0 :             st->codecpar->sample_rate = 44100;
     146           0 :             offset = avio_rl32(s->pb);
     147           0 :             break;
     148           0 :         default:
     149           0 :             avpriv_request_sample(s, "Unsupported type: %X", type);
     150           0 :             return AVERROR_PATCHWELCOME;
     151             :         }
     152           0 :     } else {
     153           0 :         av_assert0(0);
     154             :     }
     155             : 
     156           0 :     avio_seek(s->pb, offset, SEEK_SET);
     157             : 
     158           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
     159             : 
     160           0 :     return 0;
     161             : }
     162             : 
     163           0 : static int musx_read_packet(AVFormatContext *s, AVPacket *pkt)
     164             : {
     165           0 :     AVCodecParameters *par = s->streams[0]->codecpar;
     166             : 
     167           0 :     return av_get_packet(s->pb, pkt, par->block_align);
     168             : }
     169             : 
     170             : AVInputFormat ff_musx_demuxer = {
     171             :     .name           = "musx",
     172             :     .long_name      = NULL_IF_CONFIG_SMALL("Eurocom MUSX"),
     173             :     .read_probe     = musx_probe,
     174             :     .read_header    = musx_read_header,
     175             :     .read_packet    = musx_read_packet,
     176             :     .extensions     = "musx",
     177             : };

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