LCOV - code coverage report
Current view: top level - libavformat - sdxdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 39 7.7 %
Date: 2017-12-16 13:57:32 Functions: 1 2 50.0 %

          Line data    Source code
       1             : /*
       2             :  * SDX 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        6130 : static int sdx_probe(AVProbeData *p)
      29             : {
      30        6130 :     if (AV_RB32(p->buf) == AV_RB32("SDX:"))
      31           0 :         return AVPROBE_SCORE_EXTENSION;
      32        6130 :     return 0;
      33             : }
      34             : 
      35           0 : static int sdx_read_header(AVFormatContext *s)
      36             : {
      37             :     AVStream *st;
      38             :     int depth, length;
      39             : 
      40           0 :     avio_skip(s->pb, 4);
      41           0 :     while (!avio_feof(s->pb)) {
      42           0 :         if (avio_r8(s->pb) == 0x1a)
      43           0 :             break;
      44             :     }
      45           0 :     if (avio_r8(s->pb) != 1)
      46           0 :         return AVERROR_INVALIDDATA;
      47           0 :     length = avio_r8(s->pb);
      48           0 :     avio_skip(s->pb, length);
      49           0 :     avio_skip(s->pb, 4);
      50           0 :     depth = avio_r8(s->pb);
      51             : 
      52           0 :     st = avformat_new_stream(s, NULL);
      53           0 :     if (!st)
      54           0 :         return AVERROR(ENOMEM);
      55             : 
      56           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      57           0 :     st->codecpar->channels = 1;
      58           0 :     st->codecpar->sample_rate = avio_rl32(s->pb);
      59           0 :     switch (depth) {
      60           0 :     case 8:
      61           0 :         st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
      62           0 :         break;
      63           0 :     case 16:
      64           0 :         st->codecpar->codec_id = AV_CODEC_ID_PCM_U16LE;
      65           0 :         break;
      66           0 :     case 24:
      67           0 :         st->codecpar->codec_id = AV_CODEC_ID_PCM_U24LE;
      68           0 :         break;
      69           0 :     case 32:
      70           0 :         st->codecpar->codec_id = AV_CODEC_ID_PCM_U32LE;
      71           0 :         break;
      72           0 :     default:
      73           0 :         return AVERROR_INVALIDDATA;
      74             :     }
      75           0 :     avio_skip(s->pb, 16);
      76           0 :     st->codecpar->block_align = depth / 8;
      77             : 
      78           0 :     return 0;
      79             : }
      80             : 
      81             : AVInputFormat ff_sdx_demuxer = {
      82             :     .name           = "sdx",
      83             :     .long_name      = NULL_IF_CONFIG_SMALL("Sample Dump eXchange"),
      84             :     .read_probe     = sdx_probe,
      85             :     .read_header    = sdx_read_header,
      86             :     .read_packet    = ff_pcm_read_packet,
      87             :     .read_seek      = ff_pcm_read_seek,
      88             :     .extensions     = "sdx",
      89             :     .flags          = AVFMT_GENERIC_INDEX,
      90             : };

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