LCOV - code coverage report
Current view: top level - libavformat - boadec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 35 14.3 %
Date: 2017-12-16 21:16:39 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * Black ops audio demuxer
       3             :  * Copyright (c) 2013 Michael Niedermayer
       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             : 
      27        6130 : static int probe(AVProbeData *p)
      28             : {
      29        6130 :     if (p->buf_size < 2096)
      30        3069 :         return 0;
      31        3061 :     if (   AV_RL32(p->buf     ) != 1
      32           0 :         || AV_RL32(p->buf +  8) > 100000
      33           0 :         || AV_RL32(p->buf + 12) > 8
      34           0 :         || AV_RL32(p->buf + 16) != 2096
      35           0 :         ||!AV_RL32(p->buf + 21)
      36           0 :         || AV_RL16(p->buf + 25) != 2096
      37           0 :         || AV_RL32(p->buf + 48) % AV_RL32(p->buf + 21)
      38             :         )
      39        3061 :         return 0;
      40           0 :     return AVPROBE_SCORE_EXTENSION;
      41             : }
      42             : 
      43             : 
      44           0 : static int read_header(AVFormatContext *s)
      45             : {
      46           0 :     AVStream *st = avformat_new_stream(s, NULL);
      47           0 :     if (!st)
      48           0 :         return AVERROR(ENOMEM);
      49             : 
      50           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      51           0 :     st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MS;
      52             : 
      53           0 :     avio_rl32(s->pb);
      54           0 :     avio_rl32(s->pb);
      55           0 :     st->codecpar->sample_rate = avio_rl32(s->pb);
      56           0 :     st->codecpar->channels    = avio_rl32(s->pb);
      57           0 :     if (st->codecpar->channels > FF_SANE_NB_CHANNELS)
      58           0 :         return AVERROR(ENOSYS);
      59           0 :     s->internal->data_offset = avio_rl32(s->pb);
      60           0 :     avio_r8(s->pb);
      61           0 :     st->codecpar->block_align = avio_rl32(s->pb);
      62           0 :     if (st->codecpar->block_align > INT_MAX / FF_SANE_NB_CHANNELS)
      63           0 :         return AVERROR_INVALIDDATA;
      64           0 :     st->codecpar->block_align *= st->codecpar->channels;
      65             : 
      66           0 :     avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
      67             : 
      68           0 :     return 0;
      69             : }
      70             : 
      71           0 : static int read_packet(AVFormatContext *s, AVPacket *pkt)
      72             : {
      73           0 :     AVStream *st = s->streams[0];
      74             : 
      75           0 :     return av_get_packet(s->pb, pkt, st->codecpar->block_align);
      76             : }
      77             : 
      78             : AVInputFormat ff_boa_demuxer = {
      79             :     .name           = "boa",
      80             :     .long_name      = NULL_IF_CONFIG_SMALL("Black Ops Audio"),
      81             :     .read_probe     = probe,
      82             :     .read_header    = read_header,
      83             :     .read_packet    = read_packet,
      84             :     .flags          = AVFMT_GENERIC_INDEX,
      85             : };

Generated by: LCOV version 1.13