LCOV - code coverage report
Current view: top level - libavformat - dcstr.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 34 8.8 %
Date: 2017-12-17 04:34:43 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * DC STR 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 "avformat.h"
      23             : #include "internal.h"
      24             : 
      25        6130 : static int dcstr_probe(AVProbeData *p)
      26             : {
      27        6130 :     if (p->buf_size < 224 || memcmp(p->buf + 213, "Sega Stream", 11))
      28        6130 :         return 0;
      29             : 
      30           0 :     return AVPROBE_SCORE_MAX;
      31             : }
      32             : 
      33           0 : static int dcstr_read_header(AVFormatContext *s)
      34             : {
      35             :     unsigned codec, align;
      36             :     int mult;
      37             :     AVStream *st;
      38             : 
      39           0 :     st = avformat_new_stream(s, NULL);
      40           0 :     if (!st)
      41           0 :         return AVERROR(ENOMEM);
      42             : 
      43           0 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      44           0 :     st->codecpar->channels    = avio_rl32(s->pb);
      45           0 :     st->codecpar->sample_rate = avio_rl32(s->pb);
      46           0 :     codec                  = avio_rl32(s->pb);
      47           0 :     align                  = avio_rl32(s->pb);
      48           0 :     avio_skip(s->pb, 4);
      49           0 :     st->duration           = avio_rl32(s->pb);
      50           0 :     mult                   = avio_rl32(s->pb);
      51           0 :     if (st->codecpar->channels <= 0 || mult <= 0 || mult > INT_MAX / st->codecpar->channels) {
      52           0 :         av_log(s, AV_LOG_ERROR, "invalid number of channels %d x %d\n", st->codecpar->channels, mult);
      53           0 :         return AVERROR_INVALIDDATA;
      54             :     }
      55           0 :     st->codecpar->channels *= mult;
      56           0 :     if (!align || align > INT_MAX / st->codecpar->channels)
      57           0 :         return AVERROR_INVALIDDATA;
      58           0 :     st->codecpar->block_align = align * st->codecpar->channels;
      59             : 
      60           0 :     switch (codec) {
      61           0 :     case  4: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_AICA;       break;
      62           0 :     case 16: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE_PLANAR; break;
      63           0 :     default: avpriv_request_sample(s, "codec %X", codec);
      64           0 :              return AVERROR_PATCHWELCOME;
      65             :     }
      66             : 
      67           0 :     avio_skip(s->pb, 0x800 - avio_tell(s->pb));
      68           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      69             : 
      70           0 :     return 0;
      71             : }
      72             : 
      73           0 : static int dcstr_read_packet(AVFormatContext *s, AVPacket *pkt)
      74             : {
      75           0 :     AVCodecParameters *par    = s->streams[0]->codecpar;
      76           0 :     return av_get_packet(s->pb, pkt, par->block_align);
      77             : }
      78             : 
      79             : AVInputFormat ff_dcstr_demuxer = {
      80             :     .name           = "dcstr",
      81             :     .long_name      = NULL_IF_CONFIG_SMALL("Sega DC STR"),
      82             :     .read_probe     = dcstr_probe,
      83             :     .read_header    = dcstr_read_header,
      84             :     .read_packet    = dcstr_read_packet,
      85             :     .extensions     = "str",
      86             :     .flags          = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK | AVFMT_NOBINSEARCH,
      87             : };

Generated by: LCOV version 1.13