visualiser now runns on defaut input device

.gitignore

@@ -3,3 +3,5 @@
 *.dll
 reload-trigger
 *.wav
+*.so
+core

ampler.c

@@ -6,10 +6,10 @@
 #include "draw.c"
 
 Ampler_state *init() {
-	Ampler_state *state = malloc(sizeof Ampler_state);
+	Ampler_state *state = malloc(sizeof (Ampler_state));
-	SDL_memset(state, 0, sizeof Ampler_state);
+	SDL_memset(state, 0, sizeof (Ampler_state));
 
-	state -> size = sizeof Ampler_state;
+	state -> size = sizeof (Ampler_state);
 
 	SDL_AudioSpec want = { 0 }, have = { 0 };
 	want.freq = SAMPLE_RATE;
@@ -29,11 +29,21 @@ Ampler_state *init() {
 	if !(state -> playdev) do
 		puts(SDL_GetError());
 
+	state -> recdev = SDL_OpenAudioDevice(
+		NULL, // default device
+		1, // is capture
+		&want,
+		&have,
+		0 // no changes allowed
+	);
+	if !(state -> playdev) do
+		puts(SDL_GetError());
+
 	// TODO: iterate a directory to load samples
-	//load_sample(state, "mix.wav");
+	//load_sample(state, "./mix.wav");
-	//load_sample(state, "loop2.wav");
+	//load_sample(state, "./loop2.wav");
-	//load_sample(state, "loop.wav");
+	//load_sample(state, "./loop.wav");
-	//load_sample(state, "chord.wav");
+	//load_sample(state, "./chord.wav");
 
 	puts("init.");
 	return state;
@@ -42,7 +52,7 @@ Ampler_state *init() {
 int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
 	if *u_data == NULL do *u_data = init();
 
-	u32 old_size = (*u_data) -> size, new_size = sizeof Ampler_state;
+	u32 old_size = (*u_data) -> size, new_size = sizeof(Ampler_state);
 	if old_size < new_size do {
 		printf("increasing size. %i to %i\n", old_size, new_size);
 		Ampler_state *nu = malloc(new_size);
@@ -60,6 +70,7 @@ int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
 	// put results in state for last frame's perf, so that we can draw it
 	SDL_SetWindowTitle(w, "ampler");
 	SDL_PauseAudioDevice(state -> playdev, 0); // unpause audio
+	SDL_PauseAudioDevice(state -> recdev, 0); // unpause audio
 	udp_init(state);
 	while 1 do {
 		SDL_Event e;
@@ -80,6 +91,7 @@ int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
 
 		if !remove("reload-trigger") do {
 			SDL_PauseAudioDevice(state -> playdev, 1); // pause audio
+			SDL_PauseAudioDevice(state -> recdev, 1); // pause audio
 			udp_quit(state);
 			puts("removed reload-trigger, reloading...");
 			return 0;

ampler.h

@@ -63,10 +63,12 @@ typedef struct Ampler_state Ampler_state;
 struct Ampler_state {
 	u32 size; // in bytes, off this struct
 	SDL_AudioDeviceID playdev;
+	SDL_AudioDeviceID recdev;
 	Sound_src sounds[64];
 	s32 played_audio_last_frame;
 	Udp_msg messages[64];
 	s8 frame_mix[CHANNELS][FRAME_SAMPLES];
+	s8 frame_rec[CHANNELS][FRAME_SAMPLES];
 };
 
 

audio.c

@@ -60,9 +60,33 @@ void sound_src_frame(Sound_src *s, s8 *mix[]) {
 	}
 }
 
+void rec_frame(Ampler_state *state) {
+	// const int frame_bytes = FRAME_SAMPLES * CHANNELS * sizeof(s16);
+	static s16 buf[FRAME_SAMPLES * CHANNELS * sizeof(s16)];
+
+	u32 samps = SDL_GetQueuedAudioSize(state->recdev) / sizeof(s16);
+
+	// TODO: this introduces a frame of lag, but should make sure we always
+	// deque a full frame, maybe find a less laggy way ?
+	if samps > FRAME_SAMPLES * CHANNELS * 2 do {
+		u32 bytes = SDL_DequeueAudio(state->recdev, buf, sizeof(buf));
+		// printf("%i %i %i samples\n", samps, bytes / sizeof(s16), sizeof(buf) / 2);
+	}
+
+	// TODO: test with stero recording input to make sure this works
+	for int i = 0; i < FRAME_SAMPLES; i += 1 do
+		for int c = 0; c < CHANNELS; c += 1 do {
+			state->frame_rec[c][i] = buf[i * CHANNELS + c] >> 8;
+		}
+}
+
 int audio_frame(Ampler_state *state) {
+	// TODO: it's unlikely but possible that we can miss recorded data because
+	// gur rec buffer was filled on a frame where we didn't play anything
+	rec_frame(state);
+
 	int queued = SDL_GetQueuedAudioSize(state -> playdev);
-	queued /= sizeof s16; // queued is in bytes
+	queued /= sizeof (s16); // queued is in bytes
 
 	if queued > FRAME_SAMPLES * CHANNELS * 2 do return 0;
 	// else puts("queued audio.");
@@ -72,8 +96,8 @@ int audio_frame(Ampler_state *state) {
 	// TODO: We should use CHANNELS here
 	// static s8 mix_l[FRAME_SAMPLES] = { 0 }, mix_r[FRAME_SAMPLES] = { 0 };
 	s8 *mix_l = state->frame_mix[0], *mix_r = state->frame_mix[1];
-	SDL_memset(mix_l, 0, FRAME_SAMPLES / sizeof s8);
+	SDL_memset(mix_l, 0, FRAME_SAMPLES / sizeof (s8));
-	SDL_memset(mix_r, 0, FRAME_SAMPLES / sizeof s8);
+	SDL_memset(mix_r, 0, FRAME_SAMPLES / sizeof (s8));
 
 	s8 *mix[] = { mix_l, mix_r };
 	foreach_ptr(Sound_src, snd, state -> sounds)
@@ -85,7 +109,7 @@ int audio_frame(Ampler_state *state) {
 		for int t = 0; t < CHANNELS; t += 1 do
 			frame[i * CHANNELS + t] = ((s16) (mix[t][i])) * vol;
 
-	if SDL_QueueAudio(state -> playdev, frame, sizeof frame) do
+	if SDL_QueueAudio(state -> playdev, frame, sizeof (frame)) do
 		puts(SDL_GetError());
 
 	return 1; // audio was qued
@@ -107,7 +131,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
 	s16 *buffer = NULL;
 	u32 bytes = 0;
 
-	SDL_LoadWAV(file_name, &spec, &buffer, &bytes);
+	SDL_LoadWAV(file_name, &spec, (u8 **) &buffer, &bytes);
 
 	if spec.format != AUDIO_S16 do {
 		puts("error: sample.wav is not s16");
@@ -115,7 +139,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
 	}
 
 	const int chans = spec.channels;
-	const int length = (bytes / sizeof s16) / chans;
+	const int length = (bytes / sizeof (s16)) / chans;
 
 	snd -> track_len = length;
 	snd -> speed = 1.0f;
@@ -124,7 +148,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
 	snd -> end = snd->track_len;
 	snd -> state = SND_STOPPED;
 	snd -> note_speed = 1.0f; // TODO: Look up a note ?
-	SDL_memset(snd->name, 0, sizeof snd->name);
+	SDL_memset(snd->name, 0, sizeof (snd->name));
 	for int i = 0; i < arraylen(snd->name) - 1; i += 1 do
 		if file_name[i] == '\0' or file_name[i] == '.' do break;
 		else snd->name[i] = file_name[i];

compile-ampler.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+gcc ampler.c udp.c -o ampler.so -shared -lSDL2 -g --std c99 && echo > reload-trigger

compile-core.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+gcc core.c -o core -lSDL2 -g

core.c

@@ -6,11 +6,30 @@
 #define SDL_MAIN_HANDLED
 #include <SDL2/SDL.h>
 
-#define SHARED_OBJECT "ampler.dll"
+#ifdef __WIN32__
+# define SHARED_OBJECT "ampler.dll"
+# define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
+#else
+# define SHARED_OBJECT "./ampler.so"
+# define SHARED_OBJECT_ACTIVE SHARED_OBJECT
+#endif
+
 #define SHARED_MAIN "ampler_main"
 
-
+#ifdef __WIN32__
-#define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
+int copy_shared_object() {
+	if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
+		puts("failed copying to " SHARED_OBJECT_ACTIVE);
+		// puts(SDL_GetError());
+		return 1;
+	}
+	return 0;
+}
+#else
+int copy_shared_object() {
+	return 0;
+}
+#endif
 
 int main(int argc, char **argv) {
 	puts("start.");
@@ -25,16 +44,10 @@ int main(int argc, char **argv) {
 	r = SDL_CreateRenderer(w, -1,
 		SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE);
 
-	//SDL_CreateWindowAndRenderer(
-	//	1080, 480, SDL_WINDOW_RESIZABLE, &w, &r);
-
 	void *u_data = NULL;
 	while (1) {
-		if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
+		if (copy_shared_object())
-			puts("failed copying to " SHARED_OBJECT_ACTIVE);
-			// puts(SDL_GetError());
 			break;
-		}
 
 		void *so = SDL_LoadObject(SHARED_OBJECT_ACTIVE);
 		if (so == 0) {

draw.c

@@ -13,7 +13,7 @@ void draw_frame(SDL_Window *w, SDL_Renderer *r, Ampler_state *state) {
 	// TODO: DRAW WITH X SCALE FACTOR
 	// TODO: DRAW SMOLER
 	SDL_SetRenderDrawColor(r, 0xFF, 0x00, 0x4D, 255);
-	const space = (44100 * 8) / 512;
+	const int space = (44100 * 8) / 512;
 	const int t = 0; // TODO: DRAW L / R OVERLAPPED IN DIFF COLORS ?
 	const int wav_h = 128;
 	if 0 do
@@ -40,6 +40,10 @@ void draw_frame(SDL_Window *w, SDL_Renderer *r, Ampler_state *state) {
 	for int x = 0; x < FRAME_SAMPLES - 1; x += 1 do {
 		u8 cur = state->frame_mix[0][x] + 128;
 		u8 next = state->frame_mix[0][x + 1] + 128;
+
+		cur = state->frame_rec[0][x] + 128;
+		next = state->frame_rec[0][x + 1] + 128;
+
 		markov[cur][next] += 1;
 	}
 

udp.c

@@ -8,7 +8,14 @@
  * store from ip + port in message ?
 */
 
+#ifdef __WIN32__
 #include <winsock2.h>
+#else
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <unistd.h>
+#endif
 
 #include "ampler.h"
 
@@ -19,8 +26,13 @@
 #undef while
 
 // G l o b a L  E v i L //
+#ifdef __WIN32__
 static SOCKET udp_sock;
+#else
+static int udp_sock;
+#endif
 
+#ifdef __WIN32__
 void udp_init(Ampler_state *state) {
 	// https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsastartup
 	WSADATA wsa;
@@ -53,12 +65,24 @@ void udp_init(Ampler_state *state) {
 	if (bind_result == SOCKET_ERROR)
 		printf("error: bind returned SOCKET_ERROR, WSAGetLastError() = %i\n" , WSAGetLastError());
 }
+#else
+void udp_init(Ampler_state *state) {
+	//
+}
+#endif
 
+#ifdef __WIN32__
 void udp_quit(Ampler_state *state) {
 	closesocket(udp_sock);
 	WSACleanup();
 }
+#else
+void udp_quit(Ampler_state *state) {
+	// close(udp_sock);
+}
+#endif
 
+#ifdef __WIN32__
 void recv_packet(Ampler_state *state) {
 	char discard_buf[32] = { 0 }; // for dropped packets
 	char *buf = discard_buf;
@@ -98,7 +122,13 @@ void recv_packet(Ampler_state *state) {
 	if (0) // FOR DEBUGGING
 		printf("%s:%d\t%s\n", from_ip_str, from_port, buf);
 }
+#else
+void recv_packet(Ampler_state *state) {
+	//
+}
+#endif
 
+#ifdef __WIN32__
 void udp_frame(Ampler_state *state) {
 	// https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-select
 	fd_set recv_fd_set;
@@ -133,6 +163,11 @@ void udp_frame(Ampler_state *state) {
 		recv_packet(state);
 	}
 }
+#else
+void udp_frame(Ampler_state *state) {
+	//
+}
+#endif