libmedia/AudioDecoderSpeex.h

   1 //   Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
   2 //
   3 // This program is free software; you can redistribute it and/or modify
   4 // it under the terms of the GNU General Public License as published by
   5 // the Free Software Foundation; either version 3 of the License, or
   6 // (at your option) any later version.
   7 //
   8 // This program is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 // GNU General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  16
  17 #include "AudioDecoder.h"
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include "gnashconfig.h"
  21 #endif
  22 #include <speex/speex.h>
  23
  24 #ifdef RESAMPLING_SPEEX
  25 # include <speex/speex_resampler.h>
  26 #endif
  27
  28 #ifndef GNASH_MEDIA_DECODER_SPEEX
  29 #define GNASH_MEDIA_DECODER_SPEEX
  30
  31 namespace gnash {
  32 namespace media {
  33
  34 /// Audio decoder for the speex codec
  35 //
  36 /// This class will use the speex resampler if available
  37 ///
  38 class AudioDecoderSpeex : public AudioDecoder
  39 {
  40 public:
  41     AudioDecoderSpeex();
  42     ~AudioDecoderSpeex();
  43
  44     boost::uint8_t* decode(const EncodedAudioFrame& input,
  45         boost::uint32_t& outputSize);
  46
  47 private:
  48
  49     SpeexBits _speex_bits;
  50     void* _speex_dec_state;
  51     int _speex_framesize;
  52
  53 #ifdef RESAMPLING_SPEEX
  54     SpeexResamplerState* _resampler;
  55     /// Number of samples in a resampled 44kHz stereo frame.
  56     boost::uint32_t _target_frame_size;
  57 #endif
  58 };
  59
  60 } // namespace media
  61 } // namespace gnash
  62
  63 #endif // GNASH_MEDIA_DECODER_SPEEX