source/sounddecoder.cpp

   1 #include <msp/core/refptr.h>
   2 #include <msp/io/file.h>
   3 #include <msp/strings/format.h>
   4 #include "mp3decoder.h"
   5 #include "oggdecoder.h"
   6 #include "sounddecoder.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace AL {
  12
  13 unsupported_sound::unsupported_sound(const string &w):
  14         runtime_error(w)
  15 { }
  16
  17
  18 SoundDecoder::SoundDecoder():
  19         source(0),
  20         freq(0),
  21         size(0),
  22         format(MONO8),
  23         eof_flag(false)
  24 { }
  25
  26 SoundDecoder::~SoundDecoder()
  27 {
  28         delete source;
  29 }
  30
  31 SoundDecoder *SoundDecoder::open_file(const string &fn)
  32 {
  33         RefPtr<IO::BufferedFile> file = new IO::BufferedFile(fn);
  34         SoundDecoder *decoder = open_io(*file);
  35         decoder->source = file.release();
  36         return decoder;
  37 }
  38
  39 SoundDecoder *SoundDecoder::open_io(IO::Seekable &io)
  40 {
  41         char sig_buf[8];
  42         io.read(sig_buf, sizeof(sig_buf));
  43         io.seek(0, IO::S_BEG);
  44         string signature(sig_buf, sizeof(sig_buf));
  45         if(OggDecoder::detect(signature))
  46                 return new OggDecoder(io);
  47         else if(Mp3Decoder::detect(signature))
  48                 return new Mp3Decoder(io);
  49         else
  50         {
  51                 string sig_hex;
  52                 for(unsigned i=0; i<sizeof(sig_buf); ++i)
  53                 {
  54                         if(i)
  55                                 sig_hex += ' ';
  56                         sig_hex += Msp::format("%02X", static_cast<unsigned char>(sig_buf[i]));
  57                 }
  58                 throw unsupported_sound(sig_hex);
  59         }
  60 }
  61
  62 } // namespace AL
  63 } // namespace Msp