libmedia/AudioDecoderSimple.h

   1 // AudioDecoderSimple.h: Audio decoding using "simple" internal decoders.
   2 //
   3 //   Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   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 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18
  19
  20 #ifndef GNASH_AUDIODECODERSIMPLE_H
  21 #define GNASH_AUDIODECODERSIMPLE_H
  22
  23 #include "AudioDecoder.h" // for inheritance
  24 #include "MediaParser.h" // for audioCodecType enum (composition)
  25
  26 // Forward declarations
  27 namespace gnash {
  28     namespace media {
  29         class SoundInfo;
  30         class AudioInfo;
  31     }
  32 }
  33
  34 namespace gnash {
  35 namespace media {
  36
  37 /// Audio decoding using "simple" internal decoders.
  38 class AudioDecoderSimple : public AudioDecoder {
  39
  40 public:
  41
  42         /// @param info
  43         ///     AudioInfo class with all the info needed to decode
  44         ///     the sound correctly. Throws a MediaException on fatal
  45         ///     error.
  46     ///
  47     /// @throws MediaException on failure
  48     ///
  49         AudioDecoderSimple(const AudioInfo& info);
  50
  51         /// @param info
  52         ///     SoundInfo class with all the info needed to decode
  53         ///     the sound correctly. Throws a MediaException on fatal
  54         ///     error.
  55     ///
  56     /// @throws MediaException on failure
  57     ///
  58         AudioDecoderSimple(const SoundInfo& info);
  59
  60         ~AudioDecoderSimple();
  61
  62     // See dox in AudioDecoder.h
  63         boost::uint8_t* decode(const boost::uint8_t* input, boost::uint32_t inputSize, boost::uint32_t& outputSize, boost::uint32_t& decodedBytes, bool parse);
  64
  65 private:
  66
  67     // throws MediaException on failure
  68         void setup(const AudioInfo& info);
  69
  70     // throws MediaException on failure
  71         void setup(const SoundInfo& info);
  72
  73         // codec
  74         audioCodecType _codec;
  75
  76         // samplerate
  77         boost::uint16_t _sampleRate;
  78
  79         // sampleCount
  80         boost::uint32_t _sampleCount;
  81
  82         // stereo
  83         bool _stereo;
  84
  85         // samplesize: 8 or 16 bit
  86         bool _is16bit;
  87
  88
  89         //
  90 };
  91
  92 } // gnash.media namespace
  93 } // gnash namespace
  94
  95 #endif // __AUDIODECODERSIMPLE_H__
  96