Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * PVF 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 "avformat.h"
  23. #include "internal.h"
  24. #include "pcm.h"
  25.  
  26. static int pvf_probe(AVProbeData *p)
  27. {
  28.     if (!memcmp(p->buf, "PVF1\n", 5))
  29.         return AVPROBE_SCORE_MAX;
  30.     return 0;
  31. }
  32.  
  33. static int pvf_read_header(AVFormatContext *s)
  34. {
  35.     char buffer[32];
  36.     AVStream *st;
  37.     int bps, channels, sample_rate;
  38.  
  39.     avio_skip(s->pb, 5);
  40.     ff_get_line(s->pb, buffer, sizeof(buffer));
  41.     if (sscanf(buffer, "%d %d %d",
  42.                &channels,
  43.                &sample_rate,
  44.                &bps) != 3)
  45.         return AVERROR_INVALIDDATA;
  46.  
  47.     if (channels <= 0 || bps <= 0 || sample_rate <= 0)
  48.         return AVERROR_INVALIDDATA;
  49.  
  50.     st = avformat_new_stream(s, NULL);
  51.     if (!st)
  52.         return AVERROR(ENOMEM);
  53.  
  54.     st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
  55.     st->codec->channels    = channels;
  56.     st->codec->sample_rate = sample_rate;
  57.     st->codec->codec_id    = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF);
  58.     st->codec->bits_per_coded_sample = bps;
  59.     st->codec->block_align = bps * st->codec->channels / 8;
  60.  
  61.     avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
  62.  
  63.     return 0;
  64. }
  65.  
  66. AVInputFormat ff_pvf_demuxer = {
  67.     .name           = "pvf",
  68.     .long_name      = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"),
  69.     .read_probe     = pvf_probe,
  70.     .read_header    = pvf_read_header,
  71.     .read_packet    = ff_pcm_read_packet,
  72.     .read_seek      = ff_pcm_read_seek,
  73.     .extensions     = "pvf",
  74.     .flags          = AVFMT_GENERIC_INDEX,
  75. };
  76.