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 }
  26
  27 void Jukebox::set_playlist(const Playlist *p)
  28 {
  29         bool was_playing = decoder;
  30         stop();
  31         playlist = p;
  32         if(playlist && was_playing)
  33                 play();
  34 }
  35
  36 void Jukebox::play()
  37 {
  38         if(!playlist || playlist->empty() || decoder)
  39                 return;
  40
  41         in = playlist->open(current);
  42         decoder = SoundDecoder::open_io(*in);
  43         streamer.play(*decoder);
  44 }
  45
  46 void Jukebox::next()
  47 {
  48         if(!playlist || playlist->empty())
  49                 return;
  50
  51         stop();
  52         current = playlist->advance(current, 1);
  53         signal_track_changed.emit(current);
  54         play();
  55 }
  56
  57 void Jukebox::previous()
  58 {
  59         if(!playlist || playlist->empty())
  60                 return;
  61
  62         stop();
  63         current = playlist->advance(current, -1);
  64         signal_track_changed.emit(current);
  65         play();
  66 }
  67
  68 void Jukebox::stop()
  69 {
  70         streamer.stop();
  71         delete decoder;
  72         decoder = 0;
  73         delete in;
  74         in = 0;
  75 }
  76
  77 void Jukebox::tick()
  78 {
  79         streamer.tick();
  80         if(decoder && decoder->eof())
  81                 next();
  82 }
  83
  84 } // namespace AL
  85 } // namespace Msp