LCOV - code coverage report
Current view: top level - libavformat - msf.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 53 5.7 %
Date: 2017-12-12 11:08:38 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * MSF 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 "internal.h"
      25             : 
      26        6130 : static int msf_probe(AVProbeData *p)
      27             : {
      28        6130 :     if (memcmp(p->buf, "MSF", 3))
      29        6130 :         return 0;
      30             : 
      31           0 :     if (AV_RB32(p->buf+8) <= 0)
      32           0 :         return 0;
      33             : 
      34           0 :     if (AV_RB32(p->buf+16) <= 0)
      35           0 :         return 0;
      36             : 
      37           0 :     if (AV_RB32(p->buf+4) > 16)
      38           0 :         return AVPROBE_SCORE_MAX / 5; //unsupported / unknown codec
      39             : 
      40           0 :     return AVPROBE_SCORE_MAX / 3 * 2;
      41             : }
      42             : 
      43           0 : static int msf_read_header(AVFormatContext *s)
      44             : {
      45             :     unsigned codec, size;
      46             :     AVStream *st;
      47             :     int ret;
      48             : 
      49           0 :     avio_skip(s->pb, 4);
      50             : 
      51           0 :     st = avformat_new_stream(s, NULL);
      52           0 :     if (!st)
      53           0 :         return AVERROR(ENOMEM);
      54             : 
      55           0 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      56           0 :     codec                  = avio_rb32(s->pb);
      57           0 :     st->codecpar->channels    = avio_rb32(s->pb);
      58           0 :     if (st->codecpar->channels <= 0 || st->codecpar->channels >= INT_MAX / 1024)
      59           0 :         return AVERROR_INVALIDDATA;
      60           0 :     size = avio_rb32(s->pb);
      61           0 :     st->codecpar->sample_rate = avio_rb32(s->pb);
      62           0 :     if (st->codecpar->sample_rate <= 0)
      63           0 :         return AVERROR_INVALIDDATA;
      64             :     // avio_rb32(s->pb); /* byte flags with encoder info */
      65           0 :     switch (codec) {
      66           0 :     case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break;
      67           0 :     case 1: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break;
      68           0 :     case 3: st->codecpar->block_align = 16 * st->codecpar->channels;
      69           0 :             st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
      70           0 :     case 4:
      71             :     case 5:
      72           0 :     case 6: st->codecpar->block_align = (codec == 4 ? 96 : codec == 5 ? 152 : 192) * st->codecpar->channels;
      73           0 :             ret = ff_alloc_extradata(st->codecpar, 14);
      74           0 :             if (ret < 0)
      75           0 :                 return ret;
      76           0 :             memset(st->codecpar->extradata, 0, st->codecpar->extradata_size);
      77           0 :             AV_WL16(st->codecpar->extradata, 1); /* version */
      78           0 :             AV_WL16(st->codecpar->extradata+2, 2048 * st->codecpar->channels); /* unknown size */
      79           0 :             AV_WL16(st->codecpar->extradata+6, codec == 4 ? 1 : 0); /* joint stereo */
      80           0 :             AV_WL16(st->codecpar->extradata+8, codec == 4 ? 1 : 0); /* joint stereo (repeat?) */
      81           0 :             AV_WL16(st->codecpar->extradata+10, 1);
      82           0 :             st->codecpar->codec_id = AV_CODEC_ID_ATRAC3;    break;
      83           0 :     case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
      84           0 :             st->codecpar->codec_id = AV_CODEC_ID_MP3;       break;
      85           0 :     default:
      86           0 :             avpriv_request_sample(s, "Codec %d", codec);
      87           0 :             return AVERROR_PATCHWELCOME;
      88             :     }
      89           0 :     st->duration = av_get_audio_frame_duration2(st->codecpar, size);
      90           0 :     avio_skip(s->pb, 0x40 - avio_tell(s->pb));
      91           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      92             : 
      93           0 :     return 0;
      94             : }
      95             : 
      96           0 : static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
      97             : {
      98           0 :     AVCodecParameters *par = s->streams[0]->codecpar;
      99             : 
     100           0 :     return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels);
     101             : }
     102             : 
     103             : AVInputFormat ff_msf_demuxer = {
     104             :     .name           = "msf",
     105             :     .long_name      = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
     106             :     .read_probe     = msf_probe,
     107             :     .read_header    = msf_read_header,
     108             :     .read_packet    = msf_read_packet,
     109             :     .extensions     = "msf",
     110             : };

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