source/sounddecoder.cpp

   1 #include <msp/core/refptr.h>
   2 #include <msp/io/file.h>
   3 #include <msp/strings/format.h>
   4 #include "oggdecoder.h"
   5 #include "sounddecoder.h"
   6
   7 using namespace std;
   8
   9 namespace Msp {
  10 namespace AL {
  11
  12 unsupported_sound::unsupported_sound(const string &w):
  13         runtime_error(w)
  14 { }
  15
  16
  17 SoundDecoder::SoundDecoder():
  18         source(0),
  19         freq(0),
  20         size(0),
  21         format(MONO8),
  22         eof_flag(false)
  23 { }
  24
  25 SoundDecoder::~SoundDecoder()
  26 {
  27         delete source;
  28 }
  29
  30 SoundDecoder *SoundDecoder::open_file(const string &fn)
  31 {
  32         RefPtr<IO::BufferedFile> file = new IO::BufferedFile(fn);
  33         SoundDecoder *decoder = open_io(*file);
  34         decoder->source = file.release();
  35         return decoder;
  36 }
  37
  38 SoundDecoder *SoundDecoder::open_io(IO::Seekable &io)
  39 {
  40         char sig_buf[8];
  41         io.read(sig_buf, sizeof(sig_buf));
  42         string signature(sig_buf, sizeof(sig_buf));
  43         if(OggDecoder::detect(signature))
  44                 return new OggDecoder(io);
  45         else
  46         {
  47                 string sig_hex;
  48                 for(unsigned i=0; i<sizeof(sig_buf); ++i)
  49                 {
  50                         if(i)
  51                                 sig_hex += ' ';
  52                         sig_hex += Msp::format("%02X", static_cast<unsigned char>(sig_buf[i]));
  53                 }
  54                 throw unsupported_sound(sig_hex);
  55         }
  56 }
  57
  58 } // namespace AL
  59 } // namespace Msp