LCOV - code coverage report
Current view: top level - libavformat - nspdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 4 44 9.1 %
Date: 2018-04-21 10:11:13 Functions: 1 2 50.0 %

          Line data    Source code
       1             : /*
       2             :  * NSP demuxer
       3             :  * Copyright (c) 2017 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/avstring.h"
      23             : #include "libavutil/intreadwrite.h"
      24             : #include "avformat.h"
      25             : #include "internal.h"
      26             : #include "pcm.h"
      27             : 
      28        6201 : static int nsp_probe(AVProbeData *p)
      29             : {
      30        6215 :     if (AV_RB32(p->buf) == AV_RB32("FORM") &&
      31          14 :         AV_RB32(p->buf + 4) == AV_RB32("DS16"))
      32           0 :         return AVPROBE_SCORE_MAX;
      33        6201 :     return 0;
      34             : }
      35             : 
      36           0 : static int nsp_read_header(AVFormatContext *s)
      37             : {
      38           0 :     int channels = 0, rate = 0;
      39             :     uint32_t chunk, size;
      40             :     AVStream *st;
      41             :     int64_t pos;
      42             : 
      43           0 :     avio_skip(s->pb, 12);
      44           0 :     st = avformat_new_stream(s, NULL);
      45           0 :     if (!st)
      46           0 :         return AVERROR(ENOMEM);
      47             : 
      48           0 :     while (!avio_feof(s->pb)) {
      49             :         char value[1024];
      50             : 
      51           0 :         chunk = avio_rb32(s->pb);
      52           0 :         size  = avio_rl32(s->pb);
      53           0 :         pos   = avio_tell(s->pb);
      54             : 
      55           0 :         switch (chunk) {
      56           0 :         case MKBETAG('H', 'E', 'D', 'R'):
      57             :         case MKBETAG('H', 'D', 'R', '8'):
      58           0 :             if (size < 32)
      59           0 :                 return AVERROR_INVALIDDATA;
      60           0 :             avio_skip(s->pb, 20);
      61           0 :             rate = avio_rl32(s->pb);
      62           0 :             avio_skip(s->pb, size - (avio_tell(s->pb) - pos));
      63           0 :             break;
      64           0 :         case MKBETAG('N', 'O', 'T', 'E'):
      65           0 :             avio_get_str(s->pb, size, value, sizeof(value));
      66           0 :             av_dict_set(&s->metadata, "Comment", value, 0);
      67           0 :             avio_skip(s->pb, size & 1);
      68           0 :             break;
      69           0 :         case MKBETAG('S', 'D', 'A', 'B'):
      70           0 :             channels = 2;
      71           0 :             break;
      72           0 :         case MKBETAG('S', 'D', '_', '2'):
      73             :         case MKBETAG('S', 'D', '_', '3'):
      74             :         case MKBETAG('S', 'D', '_', '4'):
      75             :         case MKBETAG('S', 'D', '_', '5'):
      76             :         case MKBETAG('S', 'D', '_', '6'):
      77             :         case MKBETAG('S', 'D', '_', '7'):
      78             :         case MKBETAG('S', 'D', '_', '8'):
      79           0 :             av_log(s, AV_LOG_WARNING, "Unsupported chunk!\n");
      80           0 :         case MKBETAG('S', 'D', 'A', '_'):
      81             :         case MKBETAG('S', 'D', '_', 'A'):
      82           0 :             channels = 1;
      83           0 :             break;
      84             :         }
      85             : 
      86           0 :         if (channels)
      87           0 :             break;
      88             :     }
      89             : 
      90           0 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      91           0 :     st->codecpar->channels    = channels;
      92           0 :     st->codecpar->sample_rate = rate;
      93           0 :     st->codecpar->codec_id    = AV_CODEC_ID_PCM_S16LE;
      94           0 :     st->codecpar->block_align = 2 * channels;
      95             : 
      96           0 :     return 0;
      97             : }
      98             : 
      99             : AVInputFormat ff_nsp_demuxer = {
     100             :     .name           = "nsp",
     101             :     .long_name      = NULL_IF_CONFIG_SMALL("Computerized Speech Lab NSP"),
     102             :     .read_probe     = nsp_probe,
     103             :     .read_header    = nsp_read_header,
     104             :     .read_packet    = ff_pcm_read_packet,
     105             :     .read_seek      = ff_pcm_read_seek,
     106             :     .extensions     = "nsp",
     107             :     .flags          = AVFMT_GENERIC_INDEX,
     108             : };

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