From 9411ba241f8f6ea0926a76c13a3329a95856b420 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sat, 12 Mar 2011 19:50:42 +0200
Subject: [PATCH] add a simple tool to make pocketiso .z images

---
 tools/Makefile  |   7 +++
 tools/psxcimg.c | 147 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 154 insertions(+)
 create mode 100644 tools/Makefile
 create mode 100644 tools/psxcimg.c

diff --git a/tools/Makefile b/tools/Makefile
new file mode 100644
index 00000000..bb582c67
--- /dev/null
+++ b/tools/Makefile
@@ -0,0 +1,7 @@
+CFLAGS += -Wall -O2
+LDFLAGS += -lz
+
+all: psxcimg
+
+clean:
+	$(RM) psxcimg
diff --git a/tools/psxcimg.c b/tools/psxcimg.c
new file mode 100644
index 00000000..501fc206
--- /dev/null
+++ b/tools/psxcimg.c
@@ -0,0 +1,147 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <zlib.h>
+
+#define CD_FRAMESIZE_RAW 2352
+
+struct ztab_entry {
+	unsigned int offset;
+	unsigned short size;
+} __attribute__((packed));
+
+int main(int argc, char *argv[])
+{
+	unsigned char outbuf[CD_FRAMESIZE_RAW * 2];
+	unsigned char inbuf[CD_FRAMESIZE_RAW];
+	struct ztab_entry *ztable;
+	char *out_basename, *out_fname, *out_tfname;
+	FILE *fin, *fout;
+	long in_bytes, out_bytes;
+	long s, total_sectors;
+	int ret, len;
+
+	if (argc < 2) {
+		fprintf(stderr, "usage:\n%s <cd_img> [out_basename]\n", argv[0]);
+		return 1;
+	}
+
+	fin = fopen(argv[1], "rb");
+	if (fin == NULL) {
+		fprintf(stderr, "fopen %s: ", argv[1]);
+		perror(NULL);
+		return 1;
+	}
+
+	if (argv[2] != NULL)
+		out_basename = argv[2];
+	else
+		out_basename = argv[1];
+
+	len = strlen(out_basename) + 3;
+	out_fname = malloc(len);
+	if (out_fname == NULL) {
+		fprintf(stderr, "OOM\n");
+		return 1;
+	}
+	snprintf(out_fname, len, "%s.Z", out_basename);
+
+	fout = fopen(out_fname, "wb");
+	if (fout == NULL) {
+		fprintf(stderr, "fopen %s: ", out_fname);
+		perror(NULL);
+		return 1;
+	}
+
+	if (fseek(fin, 0, SEEK_END) != 0) {
+		fprintf(stderr, "fseek failed: ");
+		perror(NULL);
+		return 1;
+	}
+
+	in_bytes = ftell(fin);
+	if (in_bytes % CD_FRAMESIZE_RAW) {
+		fprintf(stderr, "warning: input size %ld is not "
+				"multiple of sector size\n", in_bytes);
+	}
+	total_sectors = in_bytes / CD_FRAMESIZE_RAW;
+	fseek(fin, 0, SEEK_SET);
+
+	ztable = calloc(total_sectors, sizeof(ztable[0]));
+	if (ztable == NULL) {
+		fprintf(stderr, "OOM\n");
+		return 1;
+	}
+
+	out_bytes = 0;
+	for (s = 0; s < total_sectors; s++) {
+		uLongf dest_len = sizeof(outbuf);
+
+		ret = fread(inbuf, 1, sizeof(inbuf), fin);
+		if (ret != sizeof(inbuf)) {
+			printf("\n");
+			fprintf(stderr, "fread returned %d\n", ret);
+			return 1;
+		}
+
+		ret = compress2(outbuf, &dest_len, inbuf, sizeof(inbuf), 9);
+		if (ret != Z_OK) {
+			printf("\n");
+			fprintf(stderr, "compress2 failed: %d\n", ret);
+			return 1;
+		}
+
+		ret = fwrite(outbuf, 1, dest_len, fout);
+		if (ret != dest_len) {
+			printf("\n");
+			fprintf(stderr, "fwrite returned %d\n", ret);
+			return 1;
+		}
+
+		ztable[s].offset = out_bytes;
+		ztable[s].size = dest_len;
+		out_bytes += dest_len;
+
+		// print progress
+		if ((s & 0x1ff) == 0) {
+			printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
+			printf("%3ld%% %ld/%ld", s * 100 / total_sectors, s, total_sectors);
+			fflush(stdout);
+		}
+	}
+
+	fclose(fin);
+	fclose(fout);
+
+	// write .table
+	len = strlen(out_fname) + 7;
+	out_tfname = malloc(len);
+	if (out_tfname == NULL) {
+		printf("\n");
+		fprintf(stderr, "OOM\n");
+		return 1;
+	}
+	snprintf(out_tfname, len, "%s.table", out_fname);
+
+	fout = fopen(out_tfname, "wb");
+	if (fout == NULL) {
+		fprintf(stderr, "fopen %s: ", out_tfname);
+		perror(NULL);
+		return 1;
+	}
+
+	ret = fwrite(ztable, sizeof(ztable[0]), total_sectors, fout);
+	if (ret != total_sectors) {
+		printf("\n");
+		fprintf(stderr, "fwrite returned %d\n", ret);
+		return 1;
+	}
+	fclose(fout);
+
+	printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
+	printf("%3ld%% %ld/%ld\n", s * 100 / total_sectors, s, total_sectors);
+	printf("%ld bytes from %ld (%.1f%%)\n", out_bytes, in_bytes,
+		(double)out_bytes * 100.0 / in_bytes);
+
+	return 0;
+}
-- 
2.39.2