LCOV - code coverage report
Current view: top level - libavformat - vocdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 39 45 86.7 %
Date: 2017-12-15 11:05:35 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Creative Voice File demuxer.
       3             :  * Copyright (c) 2006  Aurelien Jacobs <aurel@gnuage.org>
       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 "voc.h"
      24             : #include "internal.h"
      25             : 
      26        6130 : static int voc_probe(AVProbeData *p)
      27             : {
      28             :     int version, check;
      29             : 
      30        6130 :     if (memcmp(p->buf, ff_voc_magic, sizeof(ff_voc_magic) - 1))
      31        6124 :         return 0;
      32           6 :     version = AV_RL16(p->buf + 22);
      33           6 :     check = AV_RL16(p->buf + 24);
      34           6 :     if (~version + 0x1234 != check)
      35           0 :         return 10;
      36             : 
      37           6 :     return AVPROBE_SCORE_MAX;
      38             : }
      39             : 
      40           6 : static int voc_read_header(AVFormatContext *s)
      41             : {
      42           6 :     VocDecContext *voc = s->priv_data;
      43           6 :     AVIOContext *pb = s->pb;
      44             :     int header_size;
      45             : 
      46           6 :     avio_skip(pb, 20);
      47           6 :     header_size = avio_rl16(pb) - 22;
      48           6 :     if (header_size != 4) {
      49           0 :         av_log(s, AV_LOG_ERROR, "unknown header size: %d\n", header_size);
      50           0 :         return AVERROR(ENOSYS);
      51             :     }
      52           6 :     avio_skip(pb, header_size);
      53             : 
      54           6 :     s->ctx_flags |= AVFMTCTX_NOHEADER;
      55             : 
      56           6 :     voc->remaining_size = 0;
      57           6 :     return 0;
      58             : }
      59             : 
      60         272 : static int voc_read_packet(AVFormatContext *s, AVPacket *pkt)
      61             : {
      62         272 :     if (!s->nb_streams) {
      63           6 :         AVStream *st = avformat_new_stream(s, NULL);
      64           6 :         if (!st)
      65           0 :             return AVERROR(ENOMEM);
      66           6 :         st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      67             :     }
      68         272 :     return ff_voc_get_packet(s, pkt, s->streams[0], 0);
      69             : }
      70             : 
      71          33 : static int voc_read_seek(AVFormatContext *s, int stream_index,
      72             :                          int64_t timestamp, int flags)
      73             : {
      74          33 :     VocDecContext *voc = s->priv_data;
      75             :     AVStream *st;
      76             :     int index;
      77             : 
      78          33 :     if (s->nb_streams < 1) {
      79           0 :         av_log(s, AV_LOG_ERROR, "cannot seek while no stream was found yet\n");
      80           0 :         return AVERROR(EINVAL);
      81             :     }
      82             : 
      83          33 :     st = s->streams[stream_index];
      84          33 :     index = av_index_search_timestamp(st, timestamp, flags);
      85             : 
      86          33 :     if (index >= 0 && index < st->nb_index_entries - 1) {
      87          10 :         AVIndexEntry *e = &st->index_entries[index];
      88          10 :         avio_seek(s->pb, e->pos, SEEK_SET);
      89          10 :         voc->pts = e->timestamp;
      90          10 :         voc->remaining_size = e->size;
      91          10 :         return 0;
      92          23 :     } else if (st->nb_index_entries && st->index_entries[0].timestamp <= timestamp) {
      93          19 :         AVIndexEntry *e = &st->index_entries[st->nb_index_entries - 1];
      94             :         // prepare context for seek_frame_generic()
      95          19 :         voc->pts = e->timestamp;
      96          19 :         voc->remaining_size = e->size;
      97             :     }
      98          23 :     return -1;
      99             : }
     100             : 
     101             : AVInputFormat ff_voc_demuxer = {
     102             :     .name           = "voc",
     103             :     .long_name      = NULL_IF_CONFIG_SMALL("Creative Voice"),
     104             :     .priv_data_size = sizeof(VocDecContext),
     105             :     .read_probe     = voc_probe,
     106             :     .read_header    = voc_read_header,
     107             :     .read_packet    = voc_read_packet,
     108             :     .read_seek      = voc_read_seek,
     109             :     .codec_tag      = (const AVCodecTag* const []){ ff_voc_codec_tags, 0 },
     110             : };

Generated by: LCOV version 1.13