feat: explicit export wav functions

.vscode/tasks.json

@@ -13,6 +13,7 @@
                 "${fileDirname}/ring_buffer.c",
                 "${fileDirname}/oscillator.c",
                 "${fileDirname}/parser.c",
+                "${fileDirname}/export.c",
                 "-lm",
                 "-lraylib",
                 "-o",

build.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 CC="${CXX:-cc}"
-$CC -Wall -std=c11 ./main.c ./utils.c ./ring_buffer.c ./oscillator.c ./parser.c -lm -lraylib -o ./bin/main
+$CC -Wall -std=c11 ./main.c ./utils.c ./ring_buffer.c ./oscillator.c ./parser.c ./export.c -lm -lraylib -o ./bin/main

export.c

@@ -0,0 +1,74 @@
+#include "export.h"
+
+#include "stdio.h"
+#include "string.h"
+#include "settings.h"
+
+uint16_t toInt16Sample(float sample) {
+    return (uint16_t)(sample * 32767.f);
+}
+
+static void write_file(char* filename, void* data, int size) {
+    FILE* fp = fopen(filename, "wb");  // open file for writing in binary mode
+    if (fp == NULL) {
+        fprintf(stderr, "Cannot open file: %s\n", filename);
+        exit(1);
+    }
+
+    fwrite(data, size, 1, fp);  // write data to file
+
+    fclose(fp);  // close file
+}
+
+void pack(uint16_t* d, size_t length) {
+    size_t dataLength = length * 2;
+
+    int bytesPerSample = 2;
+    int byteRate = SAMPLE_RATE * bytesPerSample;
+
+    size_t fileSize = 36 + dataLength;
+
+    uint8_t* buffer = (uint8_t*)malloc(fileSize);
+
+    int i = 0;
+
+    // RIFF header
+    memcpy(buffer + i, "RIFF", 4);
+    i += 4;
+    memcpy(buffer + i, &fileSize, 4);
+    i += 4;
+    memcpy(buffer + i, "WAVE", 4);
+    i += 4;
+
+    // fmt subchunk
+    memcpy(buffer + i, "fmt ", 4);
+    i += 4;
+    int fmtSize = 16;
+    memcpy(buffer + i, &fmtSize, 4);
+    i += 4;
+    uint16_t audioFormat = 1;
+    memcpy(buffer + i, &audioFormat, 2);
+    i += 2;
+    uint16_t numChannels = 1;
+    memcpy(buffer + i, &numChannels, 2);
+    i += 2;
+    int sampleRate = (int)SAMPLE_RATE;
+    memcpy(buffer + i, &sampleRate, 4);
+    i += 4;
+    memcpy(buffer + i, &byteRate, 4);
+    i += 4;
+    memcpy(buffer + i, &bytesPerSample, 2);
+    i += 2;
+    int bitsPerSample = bytesPerSample * 8;
+    memcpy(buffer + i, &bitsPerSample, 2);
+    i += 2;
+
+    // data subchunk
+    memcpy(buffer + i, "data", 4);
+    i += 4;
+    memcpy(buffer + i, &dataLength, 4);
+    i += 4;
+    memcpy(buffer + i, d, dataLength);
+
+    write_file("output.wav", buffer, fileSize);
+}

export.h

@@ -0,0 +1,9 @@
+#ifndef EXPORT_H
+#define EXPORT_H
+
+#include "stdlib.h"
+
+uint16_t toInt16Sample(float sample);
+void pack(uint16_t* d, size_t length);
+
+#endif

main.c

@@ -8,6 +8,7 @@
 #include "ring_buffer.h"
 #include "settings.h"
 #include "oscillator.h"
+#include "export.h"
 
 #include "raylib.h"
 
@@ -100,80 +101,7 @@ SynthSound get_note_sound(Note input) {
     int semitone_shift = get_semitone_shift(input.name);
     return note(semitone_shift, length);
 }
-
-
-//------------------------------------------------------------------------------------
-// Wav File 
-//------------------------------------------------------------------------------------
-
-static uint16_t toInt16Sample(float sample) {
-    return (uint16_t)(sample * 32767.f);
-}
-
-static void write_file(char* filename, void* data, int size) {
-    FILE* fp = fopen(filename, "wb");  // open file for writing in binary mode
-    if (fp == NULL) {
-        fprintf(stderr, "Cannot open file: %s\n", filename);
-        exit(1);
-    }
-
-    fwrite(data, size, 1, fp);  // write data to file
-
-    fclose(fp);  // close file
-}
-
-void pack(uint16_t* d, size_t length) {
-    size_t dataLength = length * 2;
-
-    int bytesPerSample = 2;
-    int byteRate = SAMPLE_RATE * bytesPerSample;
-
-    size_t fileSize = 36 + dataLength;
-
-    uint8_t* buffer = (uint8_t*)malloc(fileSize);
-
-    int i = 0;
-
-    // RIFF header
-    memcpy(buffer + i, "RIFF", 4);
-    i += 4;
-    memcpy(buffer + i, &fileSize, 4);
-    i += 4;
-    memcpy(buffer + i, "WAVE", 4);
-    i += 4;
-
-    // fmt subchunk
-    memcpy(buffer + i, "fmt ", 4);
-    i += 4;
-    int fmtSize = 16;
-    memcpy(buffer + i, &fmtSize, 4);
-    i += 4;
-    uint16_t audioFormat = 1;
-    memcpy(buffer + i, &audioFormat, 2);
-    i += 2;
-    uint16_t numChannels = 1;
-    memcpy(buffer + i, &numChannels, 2);
-    i += 2;
-    int sampleRate = (int)SAMPLE_RATE;
-    memcpy(buffer + i, &sampleRate, 4);
-    i += 4;
-    memcpy(buffer + i, &byteRate, 4);
-    i += 4;
-    memcpy(buffer + i, &bytesPerSample, 2);
-    i += 2;
-    int bitsPerSample = bytesPerSample * 8;
-    memcpy(buffer + i, &bitsPerSample, 2);
-    i += 2;
-
-    // data subchunk
-    memcpy(buffer + i, "data", 4);
-    i += 4;
-    memcpy(buffer + i, &dataLength, 4);
-    i += 4;
-    memcpy(buffer + i, d, dataLength);
-
-    write_file("output.wav", buffer, fileSize);
-}
+//-------------------------------------------------------
 
 size_t detect_note_pressed(Note* note) {
     size_t is_pressed = 0;