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xmas-egg

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This commit is contained in:
Robin Gareus 2013-12-13 20:26:30 +01:00
parent fd1d2d804f
commit c43a1f39a6
2 changed files with 59 additions and 1 deletions
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18
libs/plugins/reasonablesynth.lv2/lv2.c
View File

@ -22,6 +22,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <time.h>
/* LV2 */
#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
@ -56,6 +57,7 @@ typedef struct {
double SampleRateD;
void *synth;
bool xmas;
} RSynth;
/* main LV2 */
@ -98,6 +100,16 @@ instantiate(const LV2_Descriptor* descriptor,
self->synth = synth_alloc();
synth_init(self->synth, rate);
struct tm date;
time_t now;
time(&now);
localtime_r(&now, &date);
if (getenv("ITSXMAS") || (date.tm_mon == 11 /*dec*/ && date.tm_mday == 25)) {
printf("reasonable synth.lv2 says: happy holidays!\n");
self->xmas = true;
}
return (LV2_Handle)self;
}
@ -146,7 +158,11 @@ run(LV2_Handle handle, uint32_t n_samples)
written = synth_sound(self->synth, written, ev->time.frames, audio);
}
/* send midi message to synth */
synth_parse_midi(self->synth, (const uint8_t*)(ev+1), ev->body.size);
if (self->xmas) {
synth_parse_xmas(self->synth, (const uint8_t*)(ev+1), ev->body.size);
} else {
synth_parse_midi(self->synth, (const uint8_t*)(ev+1), ev->body.size);
}
}
ev = (LV2_Atom_Event const*) // lv2_atom_sequence_next()
((const uint8_t*)ev + sizeof(LV2_Atom_Event) + ((ev->body.size + 7) & ~7));

42
libs/plugins/reasonablesynth.lv2/rsynth.c
View File

@ -89,6 +89,8 @@ typedef struct {
float kcgain;
float kcfilt;
double rate;
uint32_t xmas_on;
uint32_t xmas_off;
} RSSynthesizer;
@ -446,6 +448,44 @@ static void synth_parse_midi(void *synth, const uint8_t *data, const size_t size
synth_process_midi_event(synth, &ev);
}
static const uint8_t jingle[] = { 71 ,71 ,71 ,71 ,71 ,71 ,71 ,74 ,67 ,69 ,71 ,72 ,72 ,72 ,72 ,72 ,71 ,71 ,71 ,71 ,71 ,69 ,69 ,71 ,69 ,74 ,71 ,71 ,71 ,71 ,71 ,71 ,71 ,74 ,67 ,69 ,71 ,72 ,72 ,72 ,72 ,72 ,71 ,71 ,71 ,71 ,74 ,74 ,72 ,69 ,67 ,62 ,62 ,71 ,69 ,67 ,62 ,62 ,62 ,62 ,71 ,69 ,67 ,64 ,64 ,64 ,72 ,71 ,69 ,66 ,74 ,76 ,74 ,72 ,69 ,71 ,62 ,62 ,71 ,69 ,67 ,62 ,62 ,62 ,62 ,71 ,69 ,67 ,64 ,64 ,64 ,72 ,71 ,69 ,74 ,74 ,74 ,74 ,76 ,74 ,72 ,69 ,67 ,74 ,71 ,71 ,71 ,71 ,71 ,71 ,71 ,74 ,67 ,69 ,71 ,72 ,72 ,72 ,72 ,72 ,71 ,71 ,71 ,71 ,71 ,69 ,69 ,71 ,69 ,74 ,71 ,71 ,71 ,71 ,71 ,71 ,71 ,74 ,67 ,69 ,71 ,72 ,72 ,72 ,72 ,72 ,71 ,71 ,71 ,71 ,74 ,74 ,72 ,69 ,67 };
static void synth_parse_xmas(void *synth, const uint8_t *data, const size_t size) {
RSSynthesizer* rs = (RSSynthesizer*)synth;
if (size < 2 || size > 3) return;
// All messages need to be 3 bytes; except program-changes: 2bytes.
if (size == 2 && (data[0] & 0xf0) != 0xC0) return;
struct rmidi_event_t ev;
ev.channel = data[0]&0x0f;
switch (data[0] & 0xf0) {
case 0x80:
ev.type=NOTE_OFF;
ev.d.tone.note=jingle[rs->xmas_off++];
ev.d.tone.velocity=data[2]&0x7f;
if (rs->xmas_off >= sizeof(jingle)) rs->xmas_off = 0;
break;
case 0x90:
ev.type=NOTE_ON;
ev.d.tone.note=jingle[rs->xmas_on++];
ev.d.tone.velocity=data[2]&0x7f;
if (rs->xmas_on >= sizeof(jingle)) rs->xmas_on = 0;
break;
case 0xB0:
ev.type=CONTROL_CHANGE;
ev.d.control.param=data[1]&0x7f;
ev.d.control.value=data[2]&0x7f;
break;
case 0xC0:
ev.type=PROGRAM_CHANGE;
ev.d.control.value=data[1]&0x7f;
break;
default:
return;
}
synth_process_midi_event(synth, &ev);
}
/**
* initialize the synth
* This should be called after synth_alloc()
@ -470,6 +510,8 @@ static void synth_init(void *synth, double rate) {
for (c=0; c < 16; c++) {
synth_load(&rs->sc[c], rate, &synthesize_sineP, &piano_adsr);
}
rs->xmas_on = 0;
rs->xmas_off = 0;
}
/**