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feat: playing full notes with ring buffer

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HiveBeats
2023-06-18 02:31:45 +04:00
parent 0eb203f9f4
commit 1ac275906f
1 changed files with 219 additions and 23 deletions
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240
main.c
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@@ -12,10 +12,118 @@
#define PITCH_STANDARD 440.f
#define VOLUME 0.5f
#define ATTACK_MS 100.f
#define STREAM_BUFFER_SIZE 2048
#define SYNTH_PI 3.1415926535f
#define SYNTH_VOLUME 0.5f
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
//------------------------------------------------------------------------------------
// Ring Buffer
//------------------------------------------------------------------------------------
typedef struct RingBuffer {
float* items;
size_t head;
size_t tail;
int is_full;
int is_empty;
size_t size;
} RingBuffer;
RingBuffer ring_buffer_init(size_t buffer_size) {
RingBuffer buffer = {
.items = calloc(buffer_size, sizeof(float)),
.head = 0,
.tail = 0,
.is_full = 0,
.is_empty = 1,
.size = buffer_size
};
return buffer;
}
void ring_buffer_reset(RingBuffer* me) {
me->head = 0;
me->tail = 0;
me->is_full = 0;
}
// +
static void advance_pointer(RingBuffer* me) {
if(me->is_full) {
me->tail++;
if (me->tail == me->size) {
me->tail = 0;
}
}
me->head++;
if (me->head == me->size) {
me->head = 0;
}
size_t is_full = me->head == me->tail ? 1 : 0;
me->is_full = is_full;
}
// -
static void retreat_pointer(RingBuffer* me) {
me->is_full = 0;
me->tail++;
if (me->tail == me->size) {
me->tail = 0;
}
}
void ring_buffer_write(RingBuffer* buffer, float* data, size_t count) {
if (buffer->is_full || buffer->head + count > buffer->size) {
printf("[WARN] Trying to overfill the ring buffer: \n\tIsFull:%d\n\tHead:%zu\n\tCount:%zu\n\t",
buffer->is_full,
buffer->head,
count);
return;
}
buffer->is_empty = 0;
for (size_t i = 0; i < count; i++) {
buffer->items[buffer->head] = data[i];
advance_pointer(buffer);
}
//me->is_empty = is_full && (me->head == me->tail);
}
int ring_buffer_read(RingBuffer* buffer, float* output, size_t count) {
if (buffer->is_empty) {
printf("[WARN] Trying to read empty buffer");
return 0;
}
for (size_t i = 0; i < count; i++) {
output[i] = buffer->items[buffer->tail];
retreat_pointer(buffer);
}
buffer->is_empty = !buffer->is_full && (buffer->head == buffer->tail);
return 1;
}
size_t ring_buffer_size(RingBuffer* buffer) {
size_t size = buffer->size;
if(!buffer->is_full) {
if(buffer->head >= buffer->tail) {
size = (buffer->head - buffer->tail);
}
else {
size = (buffer->size + buffer->head - buffer->tail);
}
}
return size;
}
//------------------------------------------------------------------------------------
// General SynthSound
//------------------------------------------------------------------------------------
@@ -25,9 +133,6 @@ typedef struct SynthSound {
size_t sample_count;
} SynthSound;
float synth_buffer[1024];
SynthSound synth_sound;
// frees the original sounds
SynthSound concat_sounds(SynthSound* sounds, size_t count) {
size_t total_count = 0;
@@ -291,7 +396,7 @@ SynthSound note(int semitone, float beats) {
float duration = beats * BEAT_DURATION;
OscillatorParameter first = {
.osc = Saw,
.osc = Square,
.freq = hz
};
@@ -428,15 +533,48 @@ size_t detect_note_pressed(Note* note) {
return is_pressed;
}
//------------------------------------------------------------------------------------
// UI
//------------------------------------------------------------------------------------
/*
int get_zero_crossing(SynthSound* sound) {
int zero_crossing_index = 0;
for (size_t i = 1; i < sound->sample_count; i++)
{
if (sound->samples[i] >= 0.0f && sound->samples[i-1] < 0.0f) // zero-crossing
{
zero_crossing_index = i;
break;
}
}
return zero_crossing_index;
}
Vector2* GetVisualSignal(SynthSound* sound, int zero_crossing_index)
{
const int signal_amp = 300;
Vector2* signal_points = malloc(sizeof(Vector2) * STREAM_BUFFER_SIZE);
const float screen_vertical_midpoint = (WINDOW_HEIGHT/2);
for (size_t point_idx = 0; point_idx < sound->sample_count; point_idx++)
{
const int signal_idx = (point_idx + zero_crossing_index) % STREAM_BUFFER_SIZE;
signal_points[point_idx].x = (float)point_idx + WINDOW_WIDTH;
signal_points[point_idx].y = screen_vertical_midpoint + (int)(sound->samples[signal_idx] * 300);
}
return signal_points;
}
*/
//------------------------------------------------------------------------------------
// Main
//------------------------------------------------------------------------------------
int main(int argc, char **argv) {
const size_t width = 640;
const size_t height = 480;
InitWindow(width, height, "SeeSynth - v0.1");
InitWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "SeeSynth - v0.1");
SetTargetFPS(120);
Note current_note = {
@@ -444,34 +582,89 @@ int main(int argc, char **argv) {
.name = malloc(sizeof(char) * 3)
};
synth_sound = (SynthSound){.sample_count = 1024, .samples = synth_buffer};
SynthSound sound = {
.sample_count = 0
};
int sound_played_count = 0;
float temp_buffer[STREAM_BUFFER_SIZE];
RingBuffer ring_buffer = ring_buffer_init(STREAM_BUFFER_SIZE);
InitAudioDevice();
SetMasterVolume(SYNTH_VOLUME);
SetAudioStreamBufferSizeDefault(STREAM_BUFFER_SIZE);
AudioStream synth_stream = LoadAudioStream(SAMPLE_RATE, sizeof(float) * 8, 1);//float*8
SetAudioStreamVolume(synth_stream, 0.5f);
PlayAudioStream(synth_stream);
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
// Update Audio states
//----------------------------------------------------------------------------------
// Fill ring buffer from current sound
size_t size_for_buffer = 0;
if (!ring_buffer.is_full && sound.sample_count != sound_played_count) {
printf("[INFO] IsFull:%d Samples:%zu Played:%zu\n",
ring_buffer.is_full,
sound.sample_count,
sound_played_count);
size_t buffer_write_size = ring_buffer.size - ring_buffer_size(&ring_buffer);
// how many samples need write
size_t size_to_fill = 0;
if ((sound.sample_count - sound_played_count) > ring_buffer.size) {
//filling_counter = ring_buffer.size;//sound.sample_count - ring_buffer.size;
size_to_fill = ring_buffer.size;
} else {
size_to_fill = sound.sample_count - sound_played_count;
}
printf("[INFO] SizeToFill:%zu\n", size_to_fill);
for (size_t i = 0; i < size_to_fill; i++) {
temp_buffer[i] = sound.samples[i];
}
ring_buffer_write(&ring_buffer, temp_buffer, size_to_fill);
sound_played_count += size_to_fill;
size_for_buffer = size_to_fill;
// printf("[INFO] The ring buffer: \n\tIsFull:%d\n\tIsEmpty:%d\n\tHead:%zu\n\tTail:%zu\n\t",
// ring_buffer.is_full,
// ring_buffer.is_empty,
// ring_buffer.head,
// ring_buffer.tail);
}
// Play ring-buffered audio
if (IsAudioStreamProcessed(synth_stream)
&& !ring_buffer.is_empty) {
size_t size_to_read = ring_buffer_size(&ring_buffer);
printf("Samples to play:%zu \n", size_to_read);
printf("Samples will be played:%zu\n", size_for_buffer);
for (size_t i=0;i< STREAM_BUFFER_SIZE; i++) {
temp_buffer[i] = 0;
}
ring_buffer_read(&ring_buffer, temp_buffer, size_for_buffer);
UpdateAudioStream(synth_stream, temp_buffer, size_for_buffer);
if (sound.sample_count == sound_played_count) {
ring_buffer_reset(&ring_buffer);
}
}
//----------------------------------------------------------------------------------
// Update On Input
//----------------------------------------------------------------------------------
if (detect_note_pressed(&current_note)) {
//get_note_sound(current_note);
SynthSound sound = get_note_sound(current_note);
//sound_buffer.sample_count = sound.sample_count;
//memcpy(sound_buffer.samples, sound.samples, sound.sample_count);
if (IsAudioStreamReady(synth_stream)) {
if (IsAudioStreamProcessed(synth_stream)) {
printf("Samples to play:%zu \n", sound.sample_count);
UpdateAudioStream(synth_stream, sound.samples, sound.sample_count);
}
}
//}
sound = get_note_sound(current_note);
sound_played_count = 0;
printf("Note played: %s\n", current_note.name);
}
//UpdateAudioStream(synth_stream, synth_sound.samples, synth_sound.sample_count);
//----------------------------------------------------------------------------------
// Draw
@@ -479,6 +672,9 @@ int main(int argc, char **argv) {
BeginDrawing();
ClearBackground(RAYWHITE);
// int zero_crossing = get_zero_crossing(&sound);
// Vector2* visual_signal = GetVisualSignal(&sound, zero_crossing);
// DrawLineStrip(visual_signal, STREAM_BUFFER_SIZE - zero_crossing, RED);
DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);