Add audio support

main.c

@@ -94,3 +94,88 @@ void unigi_ext_rect_dimensions(
 	*height = abs(bounds.y2 - bounds.y1);
 }
 
+unigi_ext_type_sound_sample * unigi_ext_sound_open(char * path) {
+	unigi_ext_type_sound_sample * sample = malloc(sizeof(unigi_ext_type_sound_sample));
+	if (sample == NULL) { goto fail; }
+	int fd = open(path,O_RDONLY);
+	if (fd == -1) { goto fail; }
+	size_t size = lseek(fd, 0, SEEK_END);
+	lseek(fd, 0, SEEK_SET);
+	uint8_t * data = malloc(size);
+	if (data == NULL) { goto fail_sample; }
+	if (read(fd,data,size) != size) { goto fail_data; }
+	close(fd);
+	sample->size = size;
+	sample->data = data;
+	return sample;
+	
+	fail_data:;
+	free(data);
+	fail_sample:;
+	free(sample);
+	close(fd);
+	fail:;
+	return NULL;
+}
+
+// TODO: add channel cap (+ static stack allocation, instead of dynamic malloc?)
+unigi_ext_type_sound_channel * unigi_ext_sound_channel_create(unigi_ext_type_sound_sample * sample) {
+	size_t i = 0;
+	unigi_ext_type_sound_channel * channel = NULL;
+	while (i < unigi_ext_sound_channels_size) {
+		if (unigi_ext_sound_channels[i].sound == NULL) {
+			channel = &unigi_ext_sound_channels[i];
+		}
+		++i;
+	}
+	
+	if (channel == NULL) {
+		unigi_ext_type_sound_channel * newchannels = realloc(unigi_ext_sound_channels,(unigi_ext_sound_channels_size + 1) * sizeof(unigi_ext_type_sound_channel));
+		if (newchannels == NULL) { goto fail; }
+		unigi_ext_sound_channels = newchannels;
+		channel = &unigi_ext_sound_channels[unigi_ext_sound_channels_size];
+		++unigi_ext_sound_channels_size;
+	}
+	
+	channel->sound = sample;
+	channel->volume = 1.0;
+	channel->start = 0;
+	channel->stop = sample->size;
+	channel->progress = 0;
+	channel->loop = 1;
+	return channel;
+	fail:;
+	return NULL;
+}
+
+void unigi_ext_sound_channel_play(unigi_ext_type_sound_channel * channel, uint8_t * buffer, size_t size) {
+	size_t i = 0;
+	while (i < size) { // TODO: make proper for loop
+		buffer[i] += (channel->sound->data[channel->progress] * (channel->volume / 2)); // TODO: cap volume (?) + remove the "/ 2" (SDL specific)
+		channel->progress += 1;
+		if (channel->progress >= channel->stop) {
+			if (channel->loop == 0) {
+				channel->sound = NULL;
+				return;
+			} else {
+				channel->progress = channel->start;
+			}
+		}
+		++i;
+	}
+}
+
+void unigi_ext_sound_handle(uint8_t * buffer, size_t size) {
+	memset(buffer, 0, size);
+	size_t i = 0;
+	while (i < unigi_ext_sound_channels_size) { // TODO: make proper for loop
+		if (unigi_ext_sound_channels[i].sound != NULL) {
+			unigi_ext_sound_channel_play(&unigi_ext_sound_channels[i],buffer,size);
+		}
+		++i;
+	}
+}
+
+void unigi_ext_sound_init() {
+	unigi_sound_init(unigi_ext_sound_handle);
+}

main.h

@@ -14,5 +14,11 @@ void unigi_ext_rect_dimensions(unigi_ext_type_rect bounds, unigi_ext_type_2d_coo
 unigi_ext_type_texture * unigi_ext_texture_create(unigi_type_resolution_2d_coord width, unigi_type_resolution_2d_coord height);
 void unigi_ext_texture_destroy(unigi_ext_type_texture * texture);
 unigi_ext_type_texture * unigi_ext_texture_open(char * path);
-
+unigi_ext_type_sound_sample * unigi_ext_sound_open(char * path);
+unigi_ext_type_sound_channel * unigi_ext_sound_channels;
+size_t unigi_ext_sound_channels_size = 0;
+unigi_ext_type_sound_channel * unigi_ext_sound_channel_create(unigi_ext_type_sound_sample * sample);
+void unigi_ext_sound_channel_play(unigi_ext_type_sound_channel * channel, uint8_t * buffer, size_t size);
+void unigi_ext_sound_handle(uint8_t * buffer, size_t size);
+void unigi_ext_sound_init();
 #endif

structs.h

@@ -16,4 +16,20 @@ struct unigi_ext_type_rect {
 	unigi_ext_type_2d_coord y2;
 };
 typedef struct unigi_ext_type_rect unigi_ext_type_rect;
+
+struct unigi_ext_type_sound_sample {
+	size_t size;
+	uint8_t * data;
+};
+typedef struct unigi_ext_type_sound_sample unigi_ext_type_sound_sample;
+
+struct unigi_ext_type_sound_channel {
+	unigi_ext_type_sound_sample * sound;
+	float volume;
+	size_t start;
+	size_t stop;
+	size_t progress;
+	unigi_type_bool loop;
+};
+typedef struct unigi_ext_type_sound_channel unigi_ext_type_sound_channel;
 #endif