music.cpp

00001 #include "music.h"
00002 
00003 //NOTE:
00004 //starting a thread inside of a class is apparently really hard to do in RTOS
00005 //since the function you pass to the thread should be static...
00006 //As a workaround I simply create a static thread_helper method
00007 //that launches the thread on behalf of the calling class.
00008 //
00009 //More info here: https://developer.mbed.org/forum/mbed/topic/4388/
00010 
00011 
00012 Music::Music(wave_player &speaker_arg)
00013 {
00014     speaker = &speaker_arg;
00015 }
00016 
00017 void Music::playMainMusic()
00018 {
00019     main_music_thread = new Thread(thread_helper, this);
00020 }
00021 
00022 void Music::stopMainMusic()
00023 {
00024     main_music_thread->terminate();
00025 }
00026 
00027 void Music::main_music()
00028 {   
00029     while(true)
00030     { 
00031         FILE *main_music_file = fopen("/sd/titlemusic.wav", "r");
00032         
00033         if(main_music_file == NULL)
00034         {
00035             while(true)
00036             {
00037                 //display error somehow. I'm having trouble definring LED
00038                 //digital out's here, but that'd be the easiest way to display it
00039             }
00040         }
00041         speaker->play(main_music_file);
00042         fclose(main_music_file);
00043     }
00044 }
00045 
00046 void Music::thread_helper(const void *arg)
00047 {    
00048     //Cast the argument to a Music instance pointer
00049     Music* instancePtr = (Music*)arg;
00050  
00051     //Call the thread method for the Music instance
00052     instancePtr->main_music();
00053 }