makefile builds objects into a build artifacts directory

also forgot to commit the header

neotools/.gitignore

@@ -5,7 +5,10 @@
 *.pcm
 *.wav
 
+*.obj_*/
 *.o
+*.d
+CMakeLists.txt
 adpcm
 adpcmb
 neoadpcmextract

neotools/autoextract.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include "neoadpcmextract.h"
+
+
+int main(int argc, char** argv)
+{
+	if (argc != 2)
+		return 1;
+
+	// Open file.
+	FILE* file = fopen(argv[1], "rb");
+	if (!file)
+		return 1;
+
+	int err = vgmExtractSamples(file);
+	fclose(file);
+	return err;
+}

neotools/neoadpcmextract.Makefile

@@ -1,12 +1,27 @@
 TARGET := neoadpcmextract
-SOURCE := neoadpcmextract.c
+SOURCE := autoextract.c neoadpcmextract.c
 CFLAGS := -std=c99 -O2 -pipe -Wall -Wextra -pedantic
+LDFLAGS := $(CFLAGS)
 
+
+OBJDIR := .obj_$(TARGET)
+OBJECT := $(patsubst %.c, $(OBJDIR)/%.o, $(SOURCE))
+DEPEND := $(OBJECT:%.o=%.d)
+
+.PHONY: default all clean
+default: $(TARGET)
 all: $(TARGET)
 
-$(TARGET): $(SOURCE)
+$(TARGET): $(OBJECT)
-	$(CC) $(CFLAGS) $< -o $@
+	$(CC) $(LDFLAGS) $^ -o $@
+
+$(OBJDIR):
+	mkdir -p $@
+
+$(OBJDIR)/%.o: %.c | $(OBJDIR)
+	$(CC) $(CFLAGS) -MMD -c $< -o $@
+
+-include: $(DEPEND)
 
-.PHONY: clean
 clean:
-	rm -f $(TARGET)
+	rm -rf $(OBJDIR)

neotools/neoadpcmextract.c

@@ -25,21 +25,23 @@
 
 typedef struct { uint8_t* data; size_t size; } Buffer;
 
-void DecodeSample(FILE* fin, const char* name, Buffer* buf)
+int DecodeSample(FILE* fin, const char* name, Buffer* buf)
 {
 	// Get sample data length.
 	uint32_t sampLen = 0;
 	fread(&sampLen, sizeof(uint32_t), 1, fin);
 	if (sampLen < sizeof(uint64_t))
-		return;
+		return 1;
 	sampLen -= sizeof(uint64_t);
 
 	// Resize buffer if needed.
 	if (!buf->data || buf->size < sampLen)
 	{
 		free(buf->data);
-		buf->data = malloc(sampLen);
 		buf->size = sampLen;
+		buf->data = malloc(sampLen);
+		if (!buf->data)
+			return 1;
 	}
 
 	// Ignore 8 bytes.
@@ -49,30 +51,28 @@ void DecodeSample(FILE* fin, const char* name, Buffer* buf)
 	// Read adpcm data.
 	fread(buf->data, sizeof(uint8_t), sampLen, fin);
 
+	// Write adpcm sample.
 	FILE* fout = fopen(name, "wb");
 	if (!fout)
-		return;
+		return 1;
-
 	fwrite(buf->data, sizeof(uint8_t), sampLen, fout);
 	fclose(fout);
+
+	return 0;
 }
 
-int main(int argc, char** argv)
+int vgmExtractSamples(FILE* file)
 {
-	if (argc != 2)
-		return 1;
-
-	// Open file.
-	FILE* file = fopen(argv[1], "rb");
-	if (!file)
-		return 1;
-
-	// Search for pcm headers.
 	Buffer smpBytes = {NULL, 0};
 	char namebuf[32];
 	int smpaCount = 0, smpbCount = 0;
+
+	// Scan for pcm headers.
 	while (!feof(file) && !ferror(file))
 	{
+		// Patterns to match (in hex):
+		// 67 66 82 - ADPCM-A
+		// 67 66 83 - ADPCM-B
 		if (fgetc(file) != 0x67 || fgetc(file) != 0x66)
 			continue;
 
@@ -81,17 +81,18 @@ int main(int argc, char** argv)
 		{
 			printf("ADPCM-A data found at 0x%08lX\n", ftell(file));
 			snprintf(namebuf, sizeof(namebuf), "smpa_%x.pcm", smpaCount++);
-			DecodeSample(file, namebuf, &smpBytes);
+			if (DecodeSample(file, namebuf, &smpBytes))
+				break;
 		}
 		else if (byte == 0x83)
 		{
 			printf("ADPCM-B data found at 0x%08lX\n", ftell(file));
 			snprintf(namebuf, sizeof(namebuf), "smpb_%x.pcm", smpbCount++);
-			DecodeSample(file, namebuf, &smpBytes);
+			if (DecodeSample(file, namebuf, &smpBytes))
+				break;
 		}
 	}
 
 	free(smpBytes.data);
-	fclose(file);
 	return 0;
 }

neotools/neoadpcmextract.h

@@ -0,0 +1,8 @@
+#ifndef __NEOADPCMEXTRACT_H__
+#define __NEOADPCMEXTRACT_H__
+
+#include <stdio.h>
+
+int vgmExtractSamples(FILE* file);
+
+#endif//__NEOADPCMEXTRACT_H__