LCOV - code coverage report
Current view: top level - libavformat - acm.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 25 12.0 %
Date: 2017-12-12 11:08:38 Functions: 1 2 50.0 %

          Line data    Source code
       1             : /*
       2             :  * ACM demuxer
       3             :  * Copyright (c) 2015 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/intreadwrite.h"
      23             : #include "avformat.h"
      24             : #include "rawdec.h"
      25             : #include "internal.h"
      26             : 
      27        6130 : static int acm_probe(AVProbeData *p)
      28             : {
      29        6130 :     if (AV_RB32(p->buf) != 0x97280301)
      30        6130 :         return 0;
      31             : 
      32           0 :     return AVPROBE_SCORE_MAX / 3 * 2;
      33             : }
      34             : 
      35           0 : static int acm_read_header(AVFormatContext *s)
      36             : {
      37             :     AVStream *st;
      38             :     int ret;
      39             : 
      40           0 :     st = avformat_new_stream(s, NULL);
      41           0 :     if (!st)
      42           0 :         return AVERROR(ENOMEM);
      43             : 
      44           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      45           0 :     st->codecpar->codec_id   = AV_CODEC_ID_INTERPLAY_ACM;
      46             : 
      47           0 :     ff_alloc_extradata(st->codecpar, 14);
      48           0 :     if (!st->codecpar->extradata)
      49           0 :         return AVERROR(ENOMEM);
      50           0 :     ret = avio_read(s->pb, st->codecpar->extradata, 14);
      51           0 :     if (ret < 10)
      52           0 :         return ret < 0 ? ret : AVERROR_EOF;
      53             : 
      54           0 :     st->codecpar->channels    = AV_RL16(st->codecpar->extradata +  8);
      55           0 :     st->codecpar->sample_rate = AV_RL16(st->codecpar->extradata + 10);
      56           0 :     if (st->codecpar->channels <= 0 || st->codecpar->sample_rate <= 0)
      57           0 :         return AVERROR_INVALIDDATA;
      58           0 :     st->start_time         = 0;
      59           0 :     st->duration           = AV_RL32(st->codecpar->extradata +  4) / st->codecpar->channels;
      60           0 :     st->need_parsing       = AVSTREAM_PARSE_FULL_RAW;
      61           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      62             : 
      63           0 :     return 0;
      64             : }
      65             : 
      66             : AVInputFormat ff_acm_demuxer = {
      67             :     .name           = "acm",
      68             :     .long_name      = NULL_IF_CONFIG_SMALL("Interplay ACM"),
      69             :     .read_probe     = acm_probe,
      70             :     .read_header    = acm_read_header,
      71             :     .read_packet    = ff_raw_read_partial_packet,
      72             :     .flags          = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,
      73             :     .extensions     = "acm",
      74             :     .raw_codec_id   = AV_CODEC_ID_INTERPLAY_ACM,
      75             : };

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