fix(code): rearrange code
This commit is contained in:
241
main.c
241
main.c
@@ -13,112 +13,45 @@
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#define PI 3.1415926535f
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//------------------------------------------------------------------------------------
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// General Sound
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//------------------------------------------------------------------------------------
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typedef struct Sound {
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float* samples;
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size_t sample_count;
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} Sound;
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/*
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static void reverse_array(float arr[], size_t start, size_t end)
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{
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float temp;
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while (start < end)
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{
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temp = arr[start];
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arr[start] = arr[end];
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arr[end] = temp;
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start++;
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end--;
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// frees the original sounds
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Sound concat_sounds(Sound* sounds, size_t count) {
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size_t total_count = 0;
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for (size_t i = 0; i < count; i++) {
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total_count += sounds[i].sample_count;
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}
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}
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*/
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// array to hold the result
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float* total = malloc(total_count * sizeof(float));
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static size_t get_semitone_shift_internal(char* root_note, char* target_note) {
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char* pitch_classes[12] =
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{ "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B" };
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size_t current_count = 0;
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for (size_t i = 0; i < count; i++) {
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memcpy(total + current_count,
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sounds[i].samples,
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sounds[i].sample_count * sizeof(float));
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current_count += sounds[i].sample_count;
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// Extract the note number and pitch class for the root note
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int root_note_num = (int)root_note[strlen(root_note) - 1] - '0';
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char* root_pitch_class_str = malloc((strlen(root_note) - 1) * sizeof(char));
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strncpy(root_pitch_class_str, root_note, strlen(root_note) - 1);
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int root_pitch_class = -1;
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for (int i = 0; i < 12; i++) {
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if (strcmp(pitch_classes[i], root_pitch_class_str) == 0) {
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root_pitch_class = i;
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break;
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}
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free(sounds[i].samples);
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}
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free(root_pitch_class_str);
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// Extract the note number and pitch class for the target note
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int target_note_num = (int)target_note[strlen(target_note) - 1] - '0';
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char* target_pitch_class_str =
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malloc((strlen(target_note) - 1) * sizeof(char));
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strncpy(target_pitch_class_str, target_note, strlen(target_note) - 1);
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int target_pitch_class = -1;
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for (int i = 0; i < 12; i++) {
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if (strcmp(pitch_classes[i], target_pitch_class_str) == 0) {
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target_pitch_class = i;
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break;
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}
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}
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free(target_pitch_class_str);
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// Calculate the semitone shift using the formula
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return (target_note_num - root_note_num) * 12 +
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(target_pitch_class - root_pitch_class);
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}
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static float get_hz_by_semitone(size_t semitone) {
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return PITCH_STANDARD * powf(powf(2.f, (1.f / 12.f)), semitone);
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}
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static Sound get_init_samples(float duration) {
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size_t sample_count = (size_t)(duration * SAMPLE_RATE);
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float* samples = malloc(sizeof(float) * sample_count);
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for (double i = 0.0; i < duration * SAMPLE_RATE; i++) {
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samples[(int)i] = i;
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}
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Sound res = {
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.samples = samples,
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.sample_count = sample_count
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Sound result = {
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.samples = total,
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.sample_count = total_count
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};
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return res;
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return result;
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}
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/*
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static Sound get_attack_samples() {
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float attack_time = 0.001 * ATTACK_MS;
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size_t sample_count = (size_t)(attack_time * SAMPLE_RATE);
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float* attack = malloc(sizeof(float) * sample_count);
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float samples_to_rise = SAMPLE_RATE * attack_time;
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float rising_delta = 1.0 / samples_to_rise;
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float i = 0.0;
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for (int j = 0; j < sample_count; j++) {
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i += rising_delta;
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attack[j] = fmin(i, 1.0);
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}
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Sound res = {
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.samples = attack,
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.sample_count = sample_count
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};
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return res;
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}
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*/
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//------------------------------------------------------------------------------------
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// Oscillator
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//------------------------------------------------------------------------------------
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typedef enum {
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Sine,
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@@ -142,6 +75,22 @@ typedef struct OscillatorGenerationParameter {
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float sample;
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} OscillatorGenerationParameter;
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static Sound get_init_samples(float duration) {
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size_t sample_count = (size_t)(duration * SAMPLE_RATE);
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float* samples = malloc(sizeof(float) * sample_count);
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for (double i = 0.0; i < duration * SAMPLE_RATE; i++) {
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samples[(int)i] = i;
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}
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Sound res = {
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.samples = samples,
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.sample_count = sample_count
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};
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return res;
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}
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static float pos(float hz, float x) {
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return fmodf(hz * x / SAMPLE_RATE, 1);
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}
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@@ -238,6 +187,81 @@ static Sound freq(float duration, OscillatorParameterList osc) {
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return res;
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}
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/*
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static Sound get_attack_samples() {
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float attack_time = 0.001 * ATTACK_MS;
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size_t sample_count = (size_t)(attack_time * SAMPLE_RATE);
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float* attack = malloc(sizeof(float) * sample_count);
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float samples_to_rise = SAMPLE_RATE * attack_time;
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float rising_delta = 1.0 / samples_to_rise;
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float i = 0.0;
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for (int j = 0; j < sample_count; j++) {
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i += rising_delta;
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attack[j] = fmin(i, 1.0);
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}
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Sound res = {
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.samples = attack,
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.sample_count = sample_count
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};
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return res;
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}
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*/
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//------------------------------------------------------------------------------------
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// Synth
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//------------------------------------------------------------------------------------
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static size_t get_semitone_shift_internal(char* root_note, char* target_note) {
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char* pitch_classes[12] =
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{ "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B" };
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// Extract the note number and pitch class for the root note
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int root_note_num = (int)root_note[strlen(root_note) - 1] - '0';
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char* root_pitch_class_str = malloc((strlen(root_note) - 1) * sizeof(char));
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strncpy(root_pitch_class_str, root_note, strlen(root_note) - 1);
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int root_pitch_class = -1;
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for (int i = 0; i < 12; i++) {
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if (strcmp(pitch_classes[i], root_pitch_class_str) == 0) {
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root_pitch_class = i;
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break;
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}
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}
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free(root_pitch_class_str);
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// Extract the note number and pitch class for the target note
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int target_note_num = (int)target_note[strlen(target_note) - 1] - '0';
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char* target_pitch_class_str =
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malloc((strlen(target_note) - 1) * sizeof(char));
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strncpy(target_pitch_class_str, target_note, strlen(target_note) - 1);
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int target_pitch_class = -1;
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for (int i = 0; i < 12; i++) {
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if (strcmp(pitch_classes[i], target_pitch_class_str) == 0) {
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target_pitch_class = i;
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break;
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}
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}
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free(target_pitch_class_str);
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// Calculate the semitone shift using the formula
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return (target_note_num - root_note_num) * 12 +
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(target_pitch_class - root_pitch_class);
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}
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static float get_hz_by_semitone(size_t semitone) {
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return PITCH_STANDARD * powf(powf(2.f, (1.f / 12.f)), semitone);
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}
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size_t get_semitone_shift(char* target_note) {
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return get_semitone_shift_internal("A4", target_note);
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}
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@@ -276,32 +300,10 @@ Sound get_note_sound(Note input) {
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return note(semitone_shift, length);
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}
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// frees the original sounds
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Sound concat_sounds(Sound* sounds, size_t count) {
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size_t total_count = 0;
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for (size_t i = 0; i < count; i++) {
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total_count += sounds[i].sample_count;
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}
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// array to hold the result
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float* total = malloc(total_count * sizeof(float));
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size_t current_count = 0;
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for (size_t i = 0; i < count; i++) {
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memcpy(total + current_count,
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sounds[i].samples,
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sounds[i].sample_count * sizeof(float));
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current_count += sounds[i].sample_count;
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free(sounds[i].samples);
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}
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Sound result = {
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.samples = total,
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.sample_count = total_count
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};
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return result;
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}
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//------------------------------------------------------------------------------------
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// Wav File
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//------------------------------------------------------------------------------------
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static uint16_t toInt16Sample(float sample) {
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return (uint16_t)(sample * 32767.f);
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@@ -319,7 +321,6 @@ static void write_file(char* filename, void* data, int size) {
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fclose(fp); // close file
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}
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void pack(uint16_t* d, size_t length) {
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size_t dataLength = length * 2;
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@@ -373,7 +374,9 @@ void pack(uint16_t* d, size_t length) {
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write_file("output.wav", buffer, fileSize);
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}
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//------------------------------------------------------------------------------------
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// Main
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//------------------------------------------------------------------------------------
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int main(int argc, char **argv) {
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char* input = "A4-4 A4-4 A4-4 A4-4 A4-2 A4-4 A4-4 A4-4 A4-4 A4-4 A4-2 D5-4 D5-4 D5-4 D5-4 D5-4 D5-4 D5-2 C5-4 C5-4 C5-4 C5-4 C5-4 C5-4 C5-2 G4-2 ";
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