LCOV - code coverage report
Current view: top level - libavformat - oggparsecelt.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 38 0.0 %
Date: 2017-12-15 11:05:35 Functions: 0 1 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Xiph CELT parser for Ogg
       3             :  * Copyright (c) 2011 Nicolas George
       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 <string.h>
      23             : 
      24             : #include "libavutil/intreadwrite.h"
      25             : #include "avformat.h"
      26             : #include "internal.h"
      27             : #include "oggdec.h"
      28             : 
      29             : struct oggcelt_private {
      30             :     int extra_headers_left;
      31             : };
      32             : 
      33           0 : static int celt_header(AVFormatContext *s, int idx)
      34             : {
      35           0 :     struct ogg *ogg = s->priv_data;
      36           0 :     struct ogg_stream *os = ogg->streams + idx;
      37           0 :     AVStream *st = s->streams[idx];
      38           0 :     struct oggcelt_private *priv = os->private;
      39           0 :     uint8_t *p = os->buf + os->pstart;
      40             : 
      41           0 :     if (os->psize == 60 &&
      42           0 :         !memcmp(p, ff_celt_codec.magic, ff_celt_codec.magicsize)) {
      43             :         /* Main header */
      44             : 
      45             :         uint32_t version, sample_rate, nb_channels;
      46             :         uint32_t overlap, extra_headers;
      47             : 
      48           0 :         priv = av_malloc(sizeof(struct oggcelt_private));
      49           0 :         if (!priv)
      50           0 :             return AVERROR(ENOMEM);
      51           0 :         if (ff_alloc_extradata(st->codecpar, 2 * sizeof(uint32_t)) < 0) {
      52           0 :             av_free(priv);
      53           0 :             return AVERROR(ENOMEM);
      54             :         }
      55           0 :         version          = AV_RL32(p + 28);
      56             :         /* unused header size field skipped */
      57           0 :         sample_rate      = AV_RL32(p + 36);
      58           0 :         nb_channels      = AV_RL32(p + 40);
      59           0 :         overlap          = AV_RL32(p + 48);
      60             :         /* unused bytes per packet field skipped */
      61           0 :         extra_headers    = AV_RL32(p + 56);
      62           0 :         st->codecpar->codec_type     = AVMEDIA_TYPE_AUDIO;
      63           0 :         st->codecpar->codec_id       = AV_CODEC_ID_CELT;
      64           0 :         st->codecpar->sample_rate    = sample_rate;
      65           0 :         st->codecpar->channels       = nb_channels;
      66           0 :         if (sample_rate)
      67           0 :             avpriv_set_pts_info(st, 64, 1, sample_rate);
      68             : 
      69           0 :         if (os->private) {
      70           0 :             av_free(priv);
      71           0 :             priv = os->private;
      72             :         }
      73           0 :         os->private = priv;
      74           0 :         priv->extra_headers_left  = 1 + extra_headers;
      75             : 
      76           0 :         AV_WL32(st->codecpar->extradata + 0, overlap);
      77           0 :         AV_WL32(st->codecpar->extradata + 4, version);
      78           0 :         return 1;
      79           0 :     } else if (priv && priv->extra_headers_left) {
      80             :         /* Extra headers (vorbiscomment) */
      81             : 
      82           0 :         ff_vorbis_stream_comment(s, st, p, os->psize);
      83           0 :         priv->extra_headers_left--;
      84           0 :         return 1;
      85             :     } else {
      86           0 :         return 0;
      87             :     }
      88             : }
      89             : 
      90             : const struct ogg_codec ff_celt_codec = {
      91             :     .magic     = "CELT    ",
      92             :     .magicsize = 8,
      93             :     .header    = celt_header,
      94             :     .nb_header = 2,
      95             : };

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