libsound/AuxStream.h

   1 // AuxStream.h - external sound input stream
   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 #ifndef SOUND_AUXSTREAM_H
  21 #define SOUND_AUXSTREAM_H
  22
  23 #include "InputStream.h" // for inheritance
  24
  25 #include <cstdint> // For C99 int types
  26
  27 namespace gnash {
  28 namespace sound {
  29
  30 /// @see sound_handler::attach_aux_streamer
  31 typedef unsigned int (*aux_streamer_ptr)(void *udata,
  32         std::int16_t* samples, unsigned int nSamples, bool& eof);
  33
  34 class AuxStream : public InputStream {
  35 public:
  36     AuxStream(aux_streamer_ptr cb, void* arg)
  37         :
  38         _samplesFetched(0),
  39         _eof(false),
  40         _cb(cb),
  41         _cbArg(arg)
  42     {}
  43
  44     // See dox in InputStream.h
  45     unsigned int fetchSamples(std::int16_t* to, unsigned int nSamples)
  46     {
  47         unsigned int wrote = _cb(_cbArg, to, nSamples, _eof);
  48         _samplesFetched += wrote;
  49         return wrote;
  50     }
  51
  52     // See dox in InputStream.h
  53     unsigned int samplesFetched() const
  54     {
  55         return _samplesFetched;
  56     }
  57
  58     // See dox in InputStream.h
  59     bool eof() const
  60     {
  61         return _eof;
  62     }
  63
  64 private:
  65     unsigned int _samplesFetched;
  66     bool _eof;
  67     aux_streamer_ptr _cb;
  68     void* _cbArg;
  69 };
  70
  71 } // gnash.sound namespace
  72 } // namespace gnash
  73
  74 #endif // SOUND_AUXSTREAM_H