source/jukebox.cpp

   1 #include <algorithm>
   2 #include <cstdlib>
   3 #include <stdexcept>
   4 #include "jukebox.h"
   5 #include "playlist.h"
   6 #include "sounddecoder.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace AL {
  12
  13 Jukebox::Jukebox():
  14         streamer(source),
  15         in(0),
  16         decoder(0),
  17         playlist(0),
  18         current(0)
  19 { }
  20
  21 Jukebox::~Jukebox()
  22 {
  23         streamer.stop();
  24         delete decoder;
  25         delete in;
  26 }
  27
  28 void Jukebox::set_playlist(const Playlist *p)
  29 {
  30         bool was_playing = decoder;
  31         stop();
  32         playlist = p;
  33         if(playlist && was_playing)
  34                 play();
  35 }
  36
  37 void Jukebox::play()
  38 {
  39         if(!playlist || playlist->empty() || decoder)
  40                 return;
  41
  42         in = playlist->open(current);
  43         decoder = SoundDecoder::open_io(*in);
  44         streamer.play(*decoder);
  45 }
  46
  47 void Jukebox::next()
  48 {
  49         if(!playlist || playlist->empty())
  50                 return;
  51
  52         stop();
  53         current = playlist->advance(current, 1);
  54         signal_track_changed.emit(current);
  55         play();
  56 }
  57
  58 void Jukebox::previous()
  59 {
  60         if(!playlist || playlist->empty())
  61                 return;
  62
  63         stop();
  64         current = playlist->advance(current, -1);
  65         signal_track_changed.emit(current);
  66         play();
  67 }
  68
  69 void Jukebox::stop()
  70 {
  71         streamer.stop();
  72         delete decoder;
  73         decoder = 0;
  74         delete in;
  75         in = 0;
  76 }
  77
  78 void Jukebox::tick()
  79 {
  80         streamer.tick();
  81         if(decoder && decoder->eof())
  82                 next();
  83 }
  84
  85 } // namespace AL
  86 } // namespace Msp