diff options
| -rw-r--r-- | apps/plugins/chip8.c | 55 |
1 files changed, 51 insertions, 4 deletions
diff --git a/apps/plugins/chip8.c b/apps/plugins/chip8.c index d19e03d762..c08079584e 100644 --- a/apps/plugins/chip8.c +++ b/apps/plugins/chip8.c @@ -61,15 +61,46 @@ static byte chip8_running; /* Flag for End-of-Emulation */ typedef void (*opcode_fn) (word opcode); typedef void (*math_fn) (byte *reg1,byte reg2); +static bool is_playing; + +/* one frame of bitswapped mp3 data */ +static unsigned char beep[]={255, +223, 28, 35, 0,192,210, 35,226, 72,188,242, 1,128,166, 16, 68,146,252,151, 19, + 10,180,245,127, 96,184, 3,184, 30, 0,118, 59,128,121,102, 6,212, 0, 97, 6, + 42, 65, 28,134,192,145, 57, 38,136, 73, 29, 38,132, 15, 21, 70, 91,185, 99,198, + 15,192, 83, 6, 33,129, 20, 6, 97, 33, 4, 6,245,128, 92, 6, 24, 0, 86, 6, + 56,129, 44, 24,224, 25, 13, 48, 50, 82,180, 11,251,106,249, 59, 24, 82,175,223, +252,119, 76,134,120,236,149,250,247,115,254,145,173,174,168,180,255,107,195, 89, + 24, 25, 48,131,192, 61, 48, 64, 10,176, 49, 64, 1,152, 50, 32, 8,140, 48, 16, + 5,129, 51,196,187, 41,177, 23,138, 70, 50, 8, 10,242, 48,192, 3,248,226, 0, + 20,100, 18, 96, 41, 96, 78,102, 7,201,122, 76,119, 20,137, 37,177, 15,132,224, + 20, 17,191, 67,147,187,116,211, 41,169, 63,172,182,186,217,155,111,140,104,254, +111,181,184,144, 17,148, 21,101,166,227,100, 86, 85, 85, 85}; + +/* callback to request more mp3 data */ +void callback(unsigned char** start, int* size) +{ + *start = beep; /* give it the same frame again */ + *size = sizeof(beep); +} + /****************************************************************************/ /* Turn sound on */ /****************************************************************************/ -static void chip8_sound_on (void) { } +static void chip8_sound_on (void) +{ + if (!is_playing) + rb->mp3_play_pause(true); /* kickoff audio */ +} /****************************************************************************/ /* Turn sound off */ /****************************************************************************/ -static void chip8_sound_off (void) { } +static void chip8_sound_off (void) +{ + if (!is_playing) + rb->mp3_play_pause(false); /* pause audio */ +} static void op_call (word opcode) { @@ -430,8 +461,9 @@ static void chip8_execute(void) --chip8_regs.delay; if (chip8_regs.sound) - --chip8_regs.sound; /* How could we make sound on the archos? */ - /* Update the machine status */ + if (--chip8_regs.sound == 0) /* Update the machine status */ + chip8_sound_off(); + chip8_update_display(); chip8_keyboard(); rb->yield(); /* we should regulate the speed by timer query, sleep/yield */ @@ -517,9 +549,24 @@ bool chip8_run(char* file) rb->lcd_clear_display(); rb->lcd_drawrect(23,0,66,64); rb->lcd_update(); + + /* init sound */ + is_playing = rb->mp3_is_playing(); /* would we disturb playback? */ + if (!is_playing) /* no? then we can make sound */ + { /* prepare */ + rb->mp3_play_init(); + rb->mp3_play_data(beep, sizeof(beep), callback); + rb->mpeg_sound_set(SOUND_VOLUME, rb->global_settings->volume); + } + chip8_reset(); while (chip8_running) chip8_execute(); + if (!is_playing) + { /* stop it if we used audio */ + rb->mp3_play_stop(); // stop audio ISR + } + return true; } |