libmedia/AudioResampler.h

   1 // AudioResampler.h -- custom audio resampler
   2 //
   3 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
   4 //   Free Software Foundation, Inc
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 3 of the License, or
   9 // (at your option) any later version.
  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
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19
  20
  21 #ifndef __GNASH_UTIL_H
  22 #define __GNASH_UTIL_H
  23
  24 #include <boost/cstdint.hpp> // for boost::int16_t
  25
  26 namespace gnash {
  27 namespace media {
  28
  29
  30 /// VERY crude audio resampler
  31 class AudioResampler {
  32
  33 public:
  34
  35         /// VERY crude sample-rate and stereo conversion.
  36         //
  37         /// Converts input data to output format.
  38         //
  39         /// @param adjusted_data
  40         /// Where the converted data is placed (output). WARNING: even though
  41         /// the type of the output data is int16, the adjusted_size output
  42         /// parameter is in bytes.
  43         ///
  44         /// @param adjusted_size
  45         /// The size of the converted data (output) in bytes.
  46         ///
  47         /// @param data
  48         /// Data that needs to be converted (input).
  49         ///
  50         /// @param sample_count
  51         /// The datas current sample count (input).
  52         ///
  53         /// @param sample_size
  54         /// The datas current sample size (input) in bytes.
  55         ///
  56         /// @param sample_rate
  57         /// The datas current sample rate (input).
  58         ///
  59         /// @param stereo
  60         /// Whether the current data is in stereo (input).
  61         ///
  62         /// @param m_sample_rate
  63         /// The samplerate we which to convert to (output).
  64         ///
  65         /// @param m_stereo
  66         /// Do we want the output data to be in stereo (output)?
  67         static void convert_raw_data(boost::int16_t** adjusted_data,
  68                   int* adjusted_size, void* data, int sample_count,
  69                   int sample_size, int sample_rate, bool stereo,
  70                   int m_sample_rate, bool m_stereo);
  71 };
  72
  73 } // namespace media
  74 } // namespace gnash
  75
  76 #endif // __GNASH_UTIL_H
  77
  78
  79 // Local Variables:
  80 // mode: C++
  81 // c-basic-offset: 8
  82 // tab-width: 8
  83 // indent-tabs-mode: t
  84 // End: