source/sounddecoder.cpp

   1 #include <msp/core/refptr.h>
   2 #include <msp/io/file.h>
   3 #include <msp/strings/format.h>
   4 #ifdef WITH_LIBMAD
   5 #include "mad/mp3decoder.h"
   6 #endif
   7 #ifdef WITH_LIBVORBIS
   8 #include "vorbis/oggdecoder.h"
   9 #endif
  10 #include "sounddecoder.h"
  11
  12 using namespace std;
  13
  14 namespace Msp {
  15 namespace AL {
  16
  17 unsupported_sound::unsupported_sound(const string &w):
  18         runtime_error(w)
  19 { }
  20
  21
  22 SoundDecoder::SoundDecoder():
  23         source(0),
  24         freq(0),
  25         size(0),
  26         format(MONO8),
  27         eof_flag(false)
  28 { }
  29
  30 SoundDecoder::~SoundDecoder()
  31 {
  32         delete source;
  33 }
  34
  35 SoundDecoder *SoundDecoder::open_file(const string &fn)
  36 {
  37         RefPtr<IO::BufferedFile> file = new IO::BufferedFile(fn);
  38         SoundDecoder *decoder = open_io(*file);
  39         decoder->source = file.release();
  40         return decoder;
  41 }
  42
  43 SoundDecoder *SoundDecoder::open_io(IO::Seekable &io)
  44 {
  45         char sig_buf[8];
  46         io.read(sig_buf, sizeof(sig_buf));
  47         io.seek(0, IO::S_BEG);
  48         string signature(sig_buf, sizeof(sig_buf));
  49
  50 #ifdef WITH_LIBVORBIS
  51         if(OggDecoder::detect(signature))
  52                 return new OggDecoder(io);
  53 #endif
  54
  55 #ifdef WITH_LIBMAD
  56         if(Mp3Decoder::detect(signature))
  57                 return new Mp3Decoder(io);
  58 #endif
  59
  60         string sig_hex;
  61         for(unsigned i=0; i<sizeof(sig_buf); ++i)
  62         {
  63                 if(i)
  64                         sig_hex += ' ';
  65                 sig_hex += Msp::format("%02X", static_cast<unsigned char>(sig_buf[i]));
  66         }
  67         throw unsupported_sound(sig_hex);
  68 }
  69
  70 } // namespace AL
  71 } // namespace Msp