LCOV - code coverage report
Current view: top level - src/libavformat - boadec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 30 16.7 %
Date: 2017-01-24 04:42:20 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 "avformat.h"
      24             : #include "internal.h"
      25             : 
      26        5563 : static int probe(AVProbeData *p)
      27             : {
      28        5563 :     if (p->buf_size < 2096)
      29        2856 :         return 0;
      30        2707 :     if (   AV_RL32(p->buf     ) != 1
      31           0 :         || AV_RL32(p->buf +  8) > 100000
      32           0 :         || AV_RL32(p->buf + 12) > 8
      33           0 :         || AV_RL32(p->buf + 16) != 2096
      34           0 :         ||!AV_RL32(p->buf + 21)
      35           0 :         || AV_RL16(p->buf + 25) != 2096
      36           0 :         || AV_RL32(p->buf + 48) % AV_RL32(p->buf + 21)
      37             :         )
      38        2707 :         return 0;
      39           0 :     return AVPROBE_SCORE_EXTENSION;
      40             : }
      41             : 
      42             : 
      43           0 : static int read_header(AVFormatContext *s)
      44             : {
      45           0 :     AVStream *st = avformat_new_stream(s, NULL);
      46           0 :     if (!st)
      47           0 :         return AVERROR(ENOMEM);
      48             : 
      49           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      50           0 :     st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MS;
      51             : 
      52           0 :     avio_rl32(s->pb);
      53           0 :     avio_rl32(s->pb);
      54           0 :     st->codecpar->sample_rate = avio_rl32(s->pb);
      55           0 :     st->codecpar->channels    = avio_rl32(s->pb);
      56           0 :     s->internal->data_offset = avio_rl32(s->pb);
      57           0 :     avio_r8(s->pb);
      58           0 :     st->codecpar->block_align = st->codecpar->channels * avio_rl32(s->pb);
      59             : 
      60           0 :     avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
      61             : 
      62           0 :     return 0;
      63             : }
      64             : 
      65           0 : static int read_packet(AVFormatContext *s, AVPacket *pkt)
      66             : {
      67           0 :     AVStream *st = s->streams[0];
      68             : 
      69           0 :     return av_get_packet(s->pb, pkt, st->codecpar->block_align);
      70             : }
      71             : 
      72             : AVInputFormat ff_boa_demuxer = {
      73             :     .name           = "boa",
      74             :     .long_name      = NULL_IF_CONFIG_SMALL("Black Ops Audio"),
      75             :     .read_probe     = probe,
      76             :     .read_header    = read_header,
      77             :     .read_packet    = read_packet,
      78             :     .flags          = AVFMT_GENERIC_INDEX,
      79             : };

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