bytemedia

commit: 976d5ec2ed3371dcbfb4849f88d7ac30f6f09672
parent dcb0df488d5f9eb90a881f6842f470b2b4821be6
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Tue, 22 Mar 2022 22:55:37 +0100

battery_low: Use clarinet

Diffstat:
M
C/Makefile
2
+-
M
C/battery_low.c
38
+++++++++++++++++++++++++++++---------

2 files changed, 30 insertions(+), 10 deletions(-)
diff --git a/C/Makefile b/C/Makefile
@@ -3,7 +3,7 @@ WAYLAND_SCANNER=`pkg-config --variable=wayland_scanner wayland-scanner`
 
 .SUFFIXES: .au
 
-all: au8b_8kHz au8b_44.1kHz SDL_YUV_visualisation wayland kagome_kagome.au
+all: au8b_8kHz au8b_44.1kHz SDL_YUV_visualisation wayland kagome_kagome.au battery_low.au
 
 SDL_YUV_visualisation: SDL_YUV_visualisation.c
 	$(CC) $(CFLAGS) SDL_YUV_visualisation.c -o SDL_YUV_visualisation `sdl2-config --cflags --libs`
diff --git a/C/battery_low.c b/C/battery_low.c
@@ -1,29 +1,49 @@
-#define _POSIX_C_SOURCE 200809L
+#define _XOPEN_SOURCE 700
 #include <stdio.h>
 #include <inttypes.h> // uint32_t
 
 #include "au.h"
+#include "misc.h"
+#include "instruments.h"
+#include "effects.h"
+
+void
+note(int dur, struct au_header *header, int hertz, float volume) {
+	char buf[4];
+
+	for(int t = 0;t<dur;t++) {
+		//float tune = pure_sin(header, hertz, t);
+		float tune = clarinet(header, hertz, t);
+		float vol = crossfade(dur, t, volume);
+
+		putchar((uint8_t)(tune * vol));
+	}
+}
+
 int
 main(void)
 {
 	// Use AU defaults
 	struct au_header header = {
 		.offset = 24, // no-annotation, in octets
-		.lenght = 0xFFFFFFFF, // unknown data size
-		.encoding = 02, // unsigned 8-bit linear PCM
-		.samplerate = 8000, // Hz
+		.length = 0xFFFFFFFF, // unknown data size
+		.encoding = AU_ENCODING_8B_LPCM,
+		.samplerate = 48000, // Hz
 		.channels = 1
 	};
 
+	header.length = header.samplerate;
+
 	// fd 1 is stdout
 	write_au_header(1, &header);
 
-	for(int t = 0;t<1600;t++)putchar( t++*1 );
-	for(int t = 0;t<1600;t++)putchar( t++*3 );
-	for(int t = 0;t<2000;t++)putchar( t++*2 );
+	int volume = 60;
+	int ref_tune = 440;
 
-	// Padding to make it 2s long
-	for(int t = 0;t<2800;t++)putchar( 0 );
+	note(header.samplerate/4, &header, note_to_hertz(ref_tune, 1-8), volume);
+	note(header.samplerate/4, &header, note_to_hertz(ref_tune, 3-8), volume);
+	note(header.samplerate/4, &header, note_to_hertz(ref_tune, 2-8), volume);
+	silence(header.samplerate/4);
 
 	return 0;
 }