src/Encoder_Abstract.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2018 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 2 of the License, or
   8 // (at your option) any later version, but always including the *additional*
   9 // restrictions defined in the "License.txt" file.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this program; if not, write to the Free Software Foundation, Inc.,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 // http://www.gnu.org/licenses/gpl-2.0.txt
  21 ///////////////////////////////////////////////////////////////////////////////
  22
  23 #include "Encoder_Abstract.h"
  24
  25 //Internal
  26 #include "Global.h"
  27
  28 //MUtils
  29 #include <MUtils/Global.h>
  30
  31 AbstractEncoder::AbstractEncoder(void)
  32 {
  33         m_configBitrate = 0;
  34         m_configRCMode = 0;
  35         m_configCustomParams.clear();
  36         m_configSamplingRate = 0;
  37 }
  38
  39 AbstractEncoder::~AbstractEncoder(void)
  40 {
  41 }
  42
  43
  44 /*
  45  * Setters
  46  */
  47
  48 void AbstractEncoder::setRCMode(const int &mode)
  49 {
  50         if (!toEncoderInfo()->isModeSupported(qMax(0, mode)))
  51         {
  52                 MUTILS_THROW("This RC mode is not supported by the encoder!");
  53         }
  54         m_configRCMode = qMax(0, mode);
  55         m_configBitrate = qBound(0, m_configBitrate, toEncoderInfo()->valueCount(m_configRCMode) - 1);
  56 }
  57
  58 void AbstractEncoder::setBitrate(const int &bitrate)
  59 {
  60         const int valueCount = toEncoderInfo()->valueCount(m_configRCMode);
  61         if ((valueCount > 0) && (qMax(0, bitrate) >= valueCount))
  62         {
  63                 MUTILS_THROW("The specified bitrate/quality is out of range!");
  64         }
  65         m_configBitrate = qMax(0, bitrate);
  66 }
  67
  68 void AbstractEncoder::setCustomParams(const QString &customParams)
  69 {
  70         m_configCustomParams = customParams.trimmed();
  71 }
  72
  73 void AbstractEncoder::setSamplingRate(const int &value)
  74 {
  75         if (!toEncoderInfo()->isResamplingSupported())
  76         {
  77                 MUTILS_THROW("This encoder does *not* support native resampling!");
  78         }
  79         m_configSamplingRate = qBound(0, value, 48000);
  80 };
  81
  82
  83 /*
  84  * Default implementation
  85  */
  86
  87 // Does encoder require the input to be downmixed to stereo?
  88 const unsigned int *AbstractEncoder::supportedChannelCount(void)
  89 {
  90         return NULL;
  91 }
  92
  93 // Does encoder require the input to be downsampled? (NULL-terminated array of supported sampling rates)
  94 const unsigned int *AbstractEncoder::supportedSamplerates(void)
  95 {
  96         return NULL;
  97 }
  98
  99 // What bitdepths does the encoder support as input? (NULL-terminated array of supported bits per sample)
 100 const unsigned int *AbstractEncoder::supportedBitdepths(void)
 101 {
 102         return NULL;
 103 }
 104
 105 //Does the encoder need the exact duration of the source?
 106 const bool AbstractEncoder::needsTimingInfo(void)
 107 {
 108         return false;
 109 }
 110
 111
 112 /*
 113  * Helper functions
 114  */
 115
 116 //Does this text contain Non-ASCII characters?
 117 bool AbstractEncoder::isUnicode(const QString &original)
 118 {
 119         if(!original.isEmpty())
 120         {
 121                 QString asLatin1 = QString::fromLatin1(original.toLatin1().constData());
 122                 return (wcscmp(MUTILS_WCHR(original), MUTILS_WCHR(asLatin1)) != 0);
 123         }
 124         return false;
 125 }
 126
 127 //Remove "problematic" characters from tag
 128 QString AbstractEncoder::cleanTag(const QString &text)
 129 {
 130         QString result(text);
 131         result.replace(QChar('"'), "'");
 132         result.replace(QChar('\\'), "/");
 133         return result;
 134 }