libmedia/AudioDecoderSpeex.h

   1 //
   2 //   Copyright (C) 2008, 2009, 2010, 2011, 2012
   3 //   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 #include "AudioDecoder.h"
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "gnashconfig.h"
  23 #endif
  24 #include <speex/speex.h>
  25
  26 #ifdef RESAMPLING_SPEEX
  27 # include <speex/speex_resampler.h>
  28 #endif
  29
  30 #ifndef GNASH_MEDIA_DECODER_SPEEX
  31 #define GNASH_MEDIA_DECODER_SPEEX
  32
  33 namespace gnash {
  34 namespace media {
  35
  36 /// Audio decoder for the speex codec
  37 //
  38 /// This class will use the speex resampler if available
  39 ///
  40 class AudioDecoderSpeex : public AudioDecoder
  41 {
  42 public:
  43     AudioDecoderSpeex();
  44     ~AudioDecoderSpeex();
  45
  46     boost::uint8_t* decode(const EncodedAudioFrame& input,
  47         boost::uint32_t& outputSize);
  48
  49 private:
  50
  51     SpeexBits _speex_bits;
  52     void* _speex_dec_state;
  53     int _speex_framesize;
  54
  55 #ifdef RESAMPLING_SPEEX
  56     SpeexResamplerState* _resampler;
  57     /// Number of samples in a resampled 44kHz stereo frame.
  58     boost::uint32_t _target_frame_size;
  59 #endif
  60 };
  61
  62 } // namespace media
  63 } // namespace gnash
  64
  65 #endif // GNASH_MEDIA_DECODER_SPEEX