LCOV - code coverage report
Current view: top level - src/libavformat - epafdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 48 10.4 %
Date: 2017-07-21 15:41:20 Functions: 1 2 50.0 %

          Line data    Source code
       1             : /*
       2             :  * Ensoniq Paris Audio File demuxer
       3             :  * Copyright (c) 2012 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/intreadwrite.h"
      23             : #include "libavcodec/internal.h"
      24             : #include "avformat.h"
      25             : #include "internal.h"
      26             : #include "pcm.h"
      27             : 
      28        5967 : static int epaf_probe(AVProbeData *p)
      29             : {
      30        5967 :     if (((AV_RL32(p->buf) == MKTAG('f','a','p',' ') &&
      31        5967 :           AV_RL32(p->buf + 8) == 1) ||
      32        5967 :          (AV_RL32(p->buf) == MKTAG(' ','p','a','f') &&
      33           0 :           AV_RN32(p->buf + 8) == 0)) &&
      34           0 :        !AV_RN32(p->buf +  4) && AV_RN32(p->buf + 12) &&
      35           0 :         AV_RN32(p->buf + 20))
      36           0 :         return AVPROBE_SCORE_MAX / 4 * 3;
      37        5967 :     return 0;
      38             : }
      39             : 
      40           0 : static int epaf_read_header(AVFormatContext *s)
      41             : {
      42             :     int le, sample_rate, codec, channels;
      43             :     AVStream *st;
      44             : 
      45           0 :     avio_skip(s->pb, 4);
      46           0 :     if (avio_rl32(s->pb))
      47           0 :         return AVERROR_INVALIDDATA;
      48             : 
      49           0 :     le = avio_rl32(s->pb);
      50           0 :     if (le && le != 1)
      51           0 :         return AVERROR_INVALIDDATA;
      52             : 
      53           0 :     if (le) {
      54           0 :         sample_rate = avio_rl32(s->pb);
      55           0 :         codec       = avio_rl32(s->pb);
      56           0 :         channels    = avio_rl32(s->pb);
      57             :     } else {
      58           0 :         sample_rate = avio_rb32(s->pb);
      59           0 :         codec       = avio_rb32(s->pb);
      60           0 :         channels    = avio_rb32(s->pb);
      61             :     }
      62             : 
      63           0 :     if (channels <= 0 || channels > FF_SANE_NB_CHANNELS || sample_rate <= 0)
      64           0 :         return AVERROR_INVALIDDATA;
      65             : 
      66           0 :     st = avformat_new_stream(s, NULL);
      67           0 :     if (!st)
      68           0 :         return AVERROR(ENOMEM);
      69             : 
      70           0 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      71           0 :     st->codecpar->channels    = channels;
      72           0 :     st->codecpar->sample_rate = sample_rate;
      73           0 :     switch (codec) {
      74           0 :     case 0:
      75           0 :         st->codecpar->codec_id = le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE;
      76           0 :         break;
      77           0 :     case 2:
      78           0 :         st->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
      79           0 :         break;
      80           0 :     case 1:
      81           0 :         avpriv_request_sample(s, "24-bit Paris PCM format");
      82           0 :     default:
      83           0 :         return AVERROR_INVALIDDATA;
      84             :     }
      85             : 
      86           0 :     st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
      87           0 :     st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
      88             : 
      89           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      90             : 
      91           0 :     if (avio_skip(s->pb, 2024) < 0)
      92           0 :         return AVERROR_INVALIDDATA;
      93           0 :     return 0;
      94             : }
      95             : 
      96             : AVInputFormat ff_epaf_demuxer = {
      97             :     .name           = "epaf",
      98             :     .long_name      = NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"),
      99             :     .read_probe     = epaf_probe,
     100             :     .read_header    = epaf_read_header,
     101             :     .read_packet    = ff_pcm_read_packet,
     102             :     .read_seek      = ff_pcm_read_seek,
     103             :     .extensions     = "paf,fap",
     104             :     .flags          = AVFMT_GENERIC_INDEX,
     105             : };

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