Rev | Line | |
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[169] | 1 | //midi.c: |
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| 2 | |
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| 3 | #include "roard.h" |
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| 4 | |
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[185] | 5 | int midi_init (void) { |
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| 6 | int i; |
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| 7 | char * files[] = { |
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| 8 | "/dev/console", |
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| 9 | #ifdef __linux__ |
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| 10 | "/dev/tty0", |
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| 11 | "/dev/vc/0", |
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| 12 | #endif |
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| 13 | NULL |
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| 14 | }; |
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| 15 | |
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| 16 | g_console = -1; |
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| 17 | |
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| 18 | for (i = 0; files[i] != NULL; i++) { |
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| 19 | if ( (g_console = open(files[i], O_WRONLY|O_NOCTTY, 0)) != -1 ) |
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| 20 | break; |
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| 21 | } |
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| 22 | |
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[187] | 23 | if ( g_console != -1 ) { |
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| 24 | return 0; |
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| 25 | } else { |
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| 26 | return -1; |
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| 27 | } |
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[185] | 28 | } |
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| 29 | |
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| 30 | int midi_free (void) { |
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| 31 | if ( g_console != -1 ) |
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| 32 | close(g_console); |
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| 33 | return 0; |
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| 34 | } |
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| 35 | |
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| 36 | int midi_cb_play(float t, float freq, int override) { |
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[189] | 37 | /* |
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| 38 | #define MIDI_CB_NOOVERRIDE 0 |
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| 39 | #define MIDI_CB_OVERRIDE 1 |
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| 40 | */ |
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[185] | 41 | return -1; |
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| 42 | } |
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| 43 | |
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[189] | 44 | int midi_cb_update (uint32_t pos) { |
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| 45 | if ( g_midi_cb_stoptime <= pos ) |
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| 46 | midi_cb_stop(); |
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| 47 | |
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| 48 | return 0; |
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| 49 | } |
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| 50 | |
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[185] | 51 | int midi_cb_start(float freq) { |
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| 52 | // On linux this uses ioctl KIOCSOUND |
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[188] | 53 | #ifdef __linux__ |
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| 54 | if ( g_console == -1 ) |
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| 55 | return -1; |
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| 56 | |
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| 57 | if ( ioctl(g_console, KIOCSOUND, (int)(1193180.0/freq)) == -1 ) |
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| 58 | return -1; |
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| 59 | |
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| 60 | return 0; |
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| 61 | #else |
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[185] | 62 | return -1; |
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[188] | 63 | #endif |
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[185] | 64 | } |
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| 65 | |
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| 66 | int midi_cb_stop (void) { |
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| 67 | #ifdef __linux__ |
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| 68 | return midi_cb_start(0); |
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| 69 | #else |
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| 70 | return -1; |
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| 71 | #endif |
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| 72 | } |
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| 73 | |
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[169] | 74 | //ll |
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