LCOV - code coverage report
Current view: top level - libavformat - ircamdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 32 45 71.1 %
Date: 2017-12-15 11:05:35 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * IRCAM demuxer
       3             :  * Copyright (c) 2012 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 "libavcodec/internal.h"
      24             : #include "avformat.h"
      25             : #include "internal.h"
      26             : #include "pcm.h"
      27             : #include "ircam.h"
      28             : 
      29        6130 : static int ircam_probe(AVProbeData *p)
      30             : {
      31        6131 :     if ((p->buf[0] == 0x64 && p->buf[1] == 0xA3 && p->buf[3] == 0x00 &&
      32        6131 :          p->buf[2] >=    1 && p->buf[2] <= 4) ||
      33        6138 :         (p->buf[3] == 0x64 && p->buf[2] == 0xA3 && p->buf[0] == 0x00 &&
      34           0 :          p->buf[1] >=    1 && p->buf[1] <= 3) &&
      35           0 :         AV_RN32(p->buf + 4) && AV_RN32(p->buf + 8))
      36           1 :         return AVPROBE_SCORE_MAX / 4 * 3;
      37        6129 :     return 0;
      38             : }
      39             : 
      40             : static const struct endianess {
      41             :     uint32_t magic;
      42             :     int      is_le;
      43             : } table[] = {
      44             :   { 0x64A30100, 0 },
      45             :   { 0x64A30200, 1 },
      46             :   { 0x64A30300, 0 },
      47             :   { 0x64A30400, 1 },
      48             :   { 0x0001A364, 1 },
      49             :   { 0x0002A364, 0 },
      50             :   { 0x0003A364, 1 },
      51             : };
      52             : 
      53           1 : static int ircam_read_header(AVFormatContext *s)
      54             : {
      55             :     uint32_t magic, sample_rate, channels, tag;
      56             :     const AVCodecTag *tags;
      57           1 :     int le = -1, i;
      58             :     AVStream *st;
      59             : 
      60           1 :     magic = avio_rl32(s->pb);
      61           5 :     for (i = 0; i < 7; i++) {
      62           5 :         if (magic == table[i].magic) {
      63           1 :             le = table[i].is_le;
      64           1 :             break;
      65             :         }
      66             :     }
      67             : 
      68           1 :     if (le == 1) {
      69           1 :         sample_rate = av_int2float(avio_rl32(s->pb));
      70           1 :         channels    = avio_rl32(s->pb);
      71           1 :         tag         = avio_rl32(s->pb);
      72           1 :         tags        = ff_codec_ircam_le_tags;
      73           0 :     } else if (le == 0) {
      74           0 :         sample_rate = av_int2float(avio_rb32(s->pb));
      75           0 :         channels    = avio_rb32(s->pb);
      76           0 :         tag         = avio_rb32(s->pb);
      77           0 :         tags        = ff_codec_ircam_be_tags;
      78             :     } else {
      79           0 :         return AVERROR_INVALIDDATA;
      80             :     }
      81             : 
      82           1 :     if (!channels || !sample_rate)
      83           0 :         return AVERROR_INVALIDDATA;
      84             : 
      85           1 :     st = avformat_new_stream(s, NULL);
      86           1 :     if (!st)
      87           0 :         return AVERROR(ENOMEM);
      88             : 
      89           1 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      90           1 :     st->codecpar->channels    = channels;
      91           1 :     if (st->codecpar->channels > FF_SANE_NB_CHANNELS)
      92           0 :         return AVERROR(ENOSYS);
      93           1 :     st->codecpar->sample_rate = sample_rate;
      94             : 
      95           1 :     st->codecpar->codec_id = ff_codec_get_id(tags, tag);
      96           1 :     if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
      97           0 :         av_log(s, AV_LOG_ERROR, "unknown tag %"PRIx32"\n", tag);
      98           0 :         return AVERROR_INVALIDDATA;
      99             :     }
     100             : 
     101           1 :     st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
     102           1 :     st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
     103           1 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
     104           1 :     avio_skip(s->pb, 1008);
     105             : 
     106           1 :     return 0;
     107             : }
     108             : 
     109             : AVInputFormat ff_ircam_demuxer = {
     110             :     .name           = "ircam",
     111             :     .long_name      = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
     112             :     .read_probe     = ircam_probe,
     113             :     .read_header    = ircam_read_header,
     114             :     .read_packet    = ff_pcm_read_packet,
     115             :     .read_seek      = ff_pcm_read_seek,
     116             :     .extensions     = "sf,ircam",
     117             :     .flags          = AVFMT_GENERIC_INDEX,
     118             : };

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