wew

my

waif/main.c

@@ -9,7 +9,7 @@
 #define FALSE 0
 
 #define SAMPLE_RATE	48000
-#define BYTE_RATE 800
+#define BYTE_RATE 1000
 
 /* CMD LINE ARG STRUCT */
 struct {
@@ -21,8 +21,12 @@ struct {
 FILE *inFile, *outFile;
 void writeWavHeader(uint32_t inputFileSize);
 void writeBytes(uint64_t bytes, int byteCount) {
-	for (int i = 0; i < byteCount; ++i)
-		fputc(((char*)bytes)[7-byteCount+i+1], outFile);
+	for (int i = 0; i < byteCount; ++i) {
+		int offset = 8 * (byteCount - i - 1);
+		uint64_t byte	= bytes & (0xFFll << offset);
+		uint8_t bytesh	= byte >> offset;
+		fputc(bytesh, outFile);
+	}
 }
 
 /* MATH */
@@ -38,15 +42,12 @@ int samplesPerByte() {
 	return SAMPLE_RATE / BYTE_RATE;
 }
 
-uint32_t audioFileSize(uint32_t inputFileSize) {
-	return samplesPerByte() * inputFileSize * 2;
-}
-
 /* MISC */
 void printHelp();
 
 int main(int argc, char *argv[]) {
 	if (argc < 2 || argc > 4) {
+		printf("a\n");
 		printHelp();
 		return -1;
 	}
@@ -54,13 +55,14 @@ int main(int argc, char *argv[]) {
 	args.source = NULL;
 	args.destination = "wout.raw";
 	args.encoding = TRUE;
-	for (int i = 0; i < argc; ++i) {
+	for (int i = 1; i < argc; ++i) {
 		switch (i) {
-		case 0:
+		case 1:
 			if (strlen(argv[i]) == 2 && argv[i][0] == '/') {
 				if (argv[i][1] == 'D' || argv[i][1] == 'd')
 					args.encoding = FALSE;
 				else if (argv[i][1] != 'E' && argv[i][1] != 'e') {
+					printf("b\n");
 					printHelp();
 					return -1;
 				}
@@ -69,23 +71,19 @@ int main(int argc, char *argv[]) {
 		default:
 			if (args.source == NULL)
 				args.source = argv[i];
-			else if (args.destination == NULL)
+			else
 				args.destination = argv[i];
-			else {
-				printHelp();
-				return -1;
-			}
 			break;
 		}
 	}
 
 	if ((inFile = fopen(args.source, "rb")) == NULL) {
-		printf("Source file does not exist or cannot be accessed.");
+		printf("Source file does not exist or cannot be accessed.\n");
 		return -1;
 	}
 
 	if ((outFile = fopen(args.destination, "wb+")) == NULL) {
-		printf("Destination file cannot be written to.");
+		printf("Destination file cannot be written to.\n");
 		return -1;
 	}
 
@@ -95,10 +93,56 @@ int main(int argc, char *argv[]) {
 		rewind(inFile);
 
 		writeWavHeader(fileSize);
+		double t = 0;
 		double dt = samplePeriod();
 		int spb = samplesPerByte();
 		for(;;) {
+			uint8_t byte = fgetc(inFile);
+			if (feof(inFile))
+				break;
 
+			double amplitude = byte == 0 ? 0 : 128 * byte - 64;
+			for (int i = 0; i < spb; ++i) {
+				int pt = i < spb/2 ? amplitude : -amplitude;//(int)round(amplitude * sin(2.f*3.14159*BYTE_RATE * t));
+				writeBytes(pt, 2);
+				t += dt;
+			}
+		}
+	}
+	else {
+		int spb = samplesPerByte();
+		fseek(inFile, 36, SEEK_SET);
+
+		for (;;) {
+			int16_t max = 0;
+			for (int i = 0; i < spb; ++i) {
+				uint8_t msb = fgetc(inFile);
+				uint8_t lsb = fgetc(inFile);
+				if (feof(inFile))
+					break;
+
+				int16_t inval = (msb << 8) | lsb;
+				max = inval > max ? inval : max;
+			}
+
+			int value;
+			for (value = 0; value < 256; ++value) {
+				if (value == 0) {
+					if (max >= 0 && max <= 32)
+						break;
+				} else if (value == 1) {
+					if (max > 32 && max <= 128)
+						break;
+				} else {
+					if (max > (value - 1) * 128 && max <= value * 128)
+						break;
+				}
+			}
+
+			fputc(value, outFile);
+
+			if (feof(inFile))
+				break;
 		}
 	}
 
@@ -114,7 +158,7 @@ void printHelp() {
 	printf("  destination\tSpecifies the directory and/or filename\n  \t\tfor the converted file.\n");
 	printf("  /E\t\tEncodes the file.\n");
 	printf("  /D\t\tDecodes the file.\n\n");
-	printf("The /E and /D switches may not be used together. If neither\nis specified, /E is implied. If destination is not supplied,\noutput will be written to 'wout'.");
+	printf("The /E and /D switches may not be used together. If neither\nis specified, /E is implied. If destination is not supplied,\noutput will be written to 'wout.raw'.\n");
 }
 
 void writeWavHeader(uint32_t inputFileSize) {
@@ -131,6 +175,5 @@ void writeWavHeader(uint32_t inputFileSize) {
 	writeBytes(2, 2);
 	writeBytes(16, 2);
 	fputs("data", outFile);
-	fputs("fmt ", outFile);
 	writeBytes(dataSize, 4);
 }