qmmp - Qmmp with Jyrki's patches

path: root/src/plugins/Ui/skinned/togglebutton.cpp

diff options

Diffstat (limited to 'src/plugins/Ui/skinned/togglebutton.cpp')

0 files changed, 0 insertions, 0 deletions

='n31' href='#n31'>31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161

/***************************************************************************
    copyright            : (C) 2012 by Lukáš Lalinský
    email                : lalinsky@gmail.com

    copyright            : (C) 2002 - 2008 by Scott Wheeler
    email                : wheeler@kde.org
                           (original Vorbis implementation)
 ***************************************************************************/

/***************************************************************************
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License version   *
 *   2.1 as published by the Free Software Foundation.                     *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful, but   *
 *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the Free Software   *
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA         *
 *   02110-1301  USA                                                       *
 *                                                                         *
 *   Alternatively, this file is available under the Mozilla Public        *
 *   License Version 1.1.  You may obtain a copy of the License at         *
 *   http://www.mozilla.org/MPL/                                           *
 ***************************************************************************/

#include <taglib/tstring.h>
#include "tdebug.h"

#include <taglib/oggpageheader.h>

#include "opusproperties.h"
#include "opusfile.h"

using namespace TagLib;
using namespace TagLib::Ogg;

class Opus::Properties::PropertiesPrivate
{
public:
  PropertiesPrivate(File *f, ReadStyle s) :
    file(f),
    style(s),
    length(0),
    inputSampleRate(0),
    channels(0),
    opusVersion(0) {}

  File *file;
  ReadStyle style;
  int length;
  int inputSampleRate;
  int channels;
  int opusVersion;
};

////////////////////////////////////////////////////////////////////////////////
// public members
////////////////////////////////////////////////////////////////////////////////

Opus::Properties::Properties(File *file, ReadStyle style) : AudioProperties(style)
{
  d = new PropertiesPrivate(file, style);
  read();
}

Opus::Properties::~Properties()
{
  delete d;
}

int Opus::Properties::length() const
{
  return d->length;
}

int Opus::Properties::bitrate() const
{
  return 0;
}

int Opus::Properties::sampleRate() const
{
  // Opus can decode any stream at a sample rate of 8, 12, 16, 24, or 48 kHz,
  // so there is no single sample rate. Let's assume it's the highest
  // possible.
  return 48000;
}

int Opus::Properties::channels() const
{
  return d->channels;
}

int Opus::Properties::inputSampleRate() const
{
  return d->inputSampleRate;
}

int Opus::Properties::opusVersion() const
{
  return d->opusVersion;
}

////////////////////////////////////////////////////////////////////////////////
// private members
////////////////////////////////////////////////////////////////////////////////

void Opus::Properties::read()
{
  // Get the identification header from the Ogg implementation.

  // http://tools.ietf.org/html/draft-terriberry-oggopus-01#section-5.1

  ByteVector data = d->file->packet(0);

  // *Magic Signature*
  int pos = 8;

  // *Version* (8 bits, unsigned)
  d->opusVersion = uchar(data.at(pos));
  pos += 1;

  // *Output Channel Count* 'C' (8 bits, unsigned)
  d->channels = uchar(data.at(pos));
  pos += 1;

  // *Pre-skip* (16 bits, unsigned, little endian)
  ushort preSkip = data.mid(pos, 2).toUShort(false);
  pos += 2;

  // *Input Sample Rate* (32 bits, unsigned, little endian)
  d->inputSampleRate = data.mid(pos, 4).toUInt(false);
  pos += 4;

  // *Output Gain* (16 bits, signed, little endian)
  pos += 2;

  // *Channel Mapping Family* (8 bits, unsigned)
  pos += 1;

  const Ogg::PageHeader *first = d->file->firstPageHeader();
  const Ogg::PageHeader *last = d->file->lastPageHeader();

  if(first && last) {
    long long start = first->absoluteGranularPosition();
    long long end = last->absoluteGranularPosition();

    if(start >= 0 && end >= 0)
      d->length = (int) ((end - start - preSkip) / 48000);
    else {
      debug("Opus::Properties::read() -- The PCM values for the start or "
            "end of this file was incorrect.");
    }
  }
  else
    debug("Opus::Properties::read() -- Could not find valid first and last Ogg pages.");
}


context:
space:
mode: