LCOV - code coverage report
Current view: top level - libavformat - soxdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 33 55 60.0 %
Date: 2017-12-15 11:05:35 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * SoX native format demuxer
       3             :  * Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu>
       4             :  *
       5             :  * Based on libSoX sox-fmt.c
       6             :  * Copyright (c) 2008 robs@users.sourceforge.net
       7             :  *
       8             :  * This file is part of FFmpeg.
       9             :  *
      10             :  * FFmpeg is free software; you can redistribute it and/or
      11             :  * modify it under the terms of the GNU Lesser General Public
      12             :  * License as published by the Free Software Foundation; either
      13             :  * version 2.1 of the License, or (at your option) any later version.
      14             :  *
      15             :  * FFmpeg is distributed in the hope that it will be useful,
      16             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      17             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      18             :  * Lesser General Public License for more details.
      19             :  *
      20             :  * You should have received a copy of the GNU Lesser General Public
      21             :  * License along with FFmpeg; if not, write to the Free Software
      22             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      23             :  */
      24             : 
      25             : /**
      26             :  * @file
      27             :  * SoX native format demuxer
      28             :  * @author Daniel Verkamp
      29             :  * @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format
      30             :  */
      31             : 
      32             : #include "libavutil/intreadwrite.h"
      33             : #include "libavutil/intfloat.h"
      34             : #include "libavutil/dict.h"
      35             : #include "avformat.h"
      36             : #include "internal.h"
      37             : #include "pcm.h"
      38             : #include "sox.h"
      39             : 
      40        6130 : static int sox_probe(AVProbeData *p)
      41             : {
      42        6130 :     if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG)
      43           1 :         return AVPROBE_SCORE_MAX;
      44        6129 :     return 0;
      45             : }
      46             : 
      47           1 : static int sox_read_header(AVFormatContext *s)
      48             : {
      49           1 :     AVIOContext *pb = s->pb;
      50             :     unsigned header_size, comment_size;
      51             :     double sample_rate, sample_rate_frac;
      52             :     AVStream *st;
      53             : 
      54           1 :     st = avformat_new_stream(s, NULL);
      55           1 :     if (!st)
      56           0 :         return AVERROR(ENOMEM);
      57             : 
      58           1 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      59             : 
      60           1 :     if (avio_rl32(pb) == SOX_TAG) {
      61           1 :         st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
      62           1 :         header_size         = avio_rl32(pb);
      63           1 :         avio_skip(pb, 8); /* sample count */
      64           1 :         sample_rate         = av_int2double(avio_rl64(pb));
      65           1 :         st->codecpar->channels = avio_rl32(pb);
      66           1 :         comment_size        = avio_rl32(pb);
      67             :     } else {
      68           0 :         st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
      69           0 :         header_size         = avio_rb32(pb);
      70           0 :         avio_skip(pb, 8); /* sample count */
      71           0 :         sample_rate         = av_int2double(avio_rb64(pb));
      72           0 :         st->codecpar->channels = avio_rb32(pb);
      73           0 :         comment_size        = avio_rb32(pb);
      74             :     }
      75             : 
      76           1 :     if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) {
      77           0 :         av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size);
      78           0 :         return AVERROR_INVALIDDATA;
      79             :     }
      80             : 
      81           1 :     if (sample_rate <= 0 || sample_rate > INT_MAX) {
      82           0 :         av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate);
      83           0 :         return AVERROR_INVALIDDATA;
      84             :     }
      85             : 
      86           1 :     sample_rate_frac = sample_rate - floor(sample_rate);
      87           1 :     if (sample_rate_frac)
      88           0 :         av_log(s, AV_LOG_WARNING,
      89             :                "truncating fractional part of sample rate (%f)\n",
      90             :                sample_rate_frac);
      91             : 
      92           1 :     if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size
      93           1 :         || st->codecpar->channels > 65535) /* Reserve top 16 bits */ {
      94           0 :         av_log(s, AV_LOG_ERROR, "invalid header\n");
      95           0 :         return AVERROR_INVALIDDATA;
      96             :     }
      97             : 
      98           1 :     if (comment_size && comment_size < UINT_MAX) {
      99           0 :         char *comment = av_malloc(comment_size+1);
     100           0 :         if(!comment)
     101           0 :             return AVERROR(ENOMEM);
     102           0 :         if (avio_read(pb, comment, comment_size) != comment_size) {
     103           0 :             av_freep(&comment);
     104           0 :             return AVERROR(EIO);
     105             :         }
     106           0 :         comment[comment_size] = 0;
     107             : 
     108           0 :         av_dict_set(&s->metadata, "comment", comment,
     109             :                                AV_DICT_DONT_STRDUP_VAL);
     110             :     }
     111             : 
     112           1 :     avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size);
     113             : 
     114           1 :     st->codecpar->sample_rate           = sample_rate;
     115           1 :     st->codecpar->bits_per_coded_sample = 32;
     116           4 :     st->codecpar->bit_rate              = (int64_t)st->codecpar->sample_rate *
     117           2 :                                           st->codecpar->bits_per_coded_sample *
     118           1 :                                           st->codecpar->channels;
     119           3 :     st->codecpar->block_align           = st->codecpar->bits_per_coded_sample *
     120           2 :                                           st->codecpar->channels / 8;
     121             : 
     122           1 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
     123             : 
     124           1 :     return 0;
     125             : }
     126             : 
     127             : AVInputFormat ff_sox_demuxer = {
     128             :     .name           = "sox",
     129             :     .long_name      = NULL_IF_CONFIG_SMALL("SoX native"),
     130             :     .read_probe     = sox_probe,
     131             :     .read_header    = sox_read_header,
     132             :     .read_packet    = ff_pcm_read_packet,
     133             :     .read_seek      = ff_pcm_read_seek,
     134             : };

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