Initial buggy commit

3 files changed, 112 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5491f94
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+split
+*.o
+track_*
+*.bin
+*.cue
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..4433bf4
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,5 @@
+CFLAGS += -Wall
+
+all: split
+
+split: split.c
diff --git a/split.c b/split.c
new file mode 100644
index 0000000..a6395c3
--- /dev/null
+++ b/split.c
@@ -0,0 +1,102 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+/* Split.c
+ * Splits a raw audio file into segments bounded by the time specified on stdin */
+
+int main(int argc, char **argv)
+{
+	FILE *fin = NULL;
+	FILE *fout = NULL;
+	char *in_fname = NULL;
+	char out_fname[] = "track-0000";
+	int m = 0;
+	int s = 0;
+	int frame = 0;
+	int index = 0;
+	int items = 0;
+	int channels = 0;
+	int rate = 0;
+	int sample_size = 0;
+	int i = 0;
+	double start = 0;
+	double finish = 0;
+	unsigned long start_sample = 0;
+	unsigned long finish_sample = 0;
+
+
+	/* FIXME Use getopt */
+	/* FIXME Replace assertions with useful checks+messages */
+	assert(argc == 5);
+
+	in_fname = argv[1];
+	channels = atoi(argv[2]);
+	rate = atoi(argv[3]);
+	sample_size = atoi(argv[4]);
+
+	assert(channels > 0);
+	assert(rate > 0);
+	assert(sample_size > 0);
+	assert(in_fname != NULL);
+
+	/* Open it up */
+	if ((fin = fopen(in_fname, "r")) == NULL)
+	{
+		fprintf(stderr,"Failed to open '%s': ", in_fname);
+		perror("fopen");
+		return EXIT_FAILURE;
+	}
+	printf("Opened input file '%s'\n", in_fname);
+
+
+	index = 0;
+	finish = 0; /* FIXME we assume first track starts at beginning of file */
+	while ( ( items = fscanf(stdin, "%d:%d:%d\n", &m, &s, &frame) ) != EOF )
+	{
+		index++;
+		/* Following track starts at end of last */
+		if (items != 3)
+		{
+			fprintf(stderr, "Timestamp #%d malformed\n", index);
+			break;
+		}
+		start = finish;
+		finish = (double)m*60 + (double)s + ((double)frame)/75;
+
+		fprintf(stderr, "Track %d starts %f s, finishes %f s\n", index, start, finish);
+
+		sprintf(out_fname, "track_%04d", index);
+
+
+		/* Open it up */
+		if ((fout = fopen(out_fname, "w")) == NULL)
+		{
+			fprintf(stderr,"Failed to open '%s': ", out_fname);
+			perror("fopen");
+			return EXIT_FAILURE;
+		}
+
+		start_sample = start * (double)rate * channels;
+		finish_sample = finish * (double)rate * channels;
+
+
+		/* Seek to first sample and write until last sample */
+		fseek(fin, start_sample*sample_size, SEEK_SET);
+
+		/* FIXME put this declaration at top */
+		char buffer[10240];
+		for (i = (int)start_sample; i < (int)finish_sample; )
+		{
+			/* FIXME unnecessary call to fwrite with items == 0 possible */
+			if ((items = fread(buffer, sample_size, sizeof(buffer)/sample_size, fin)))
+				fwrite(buffer, items, sample_size, fout);
+
+			i += items;
+		}
+
+		fclose(fout);
+	}
+}
+