From 9f50142960b7d77dd1d8a3bb1b228b3b69770dc3 Mon Sep 17 00:00:00 2001
From: Oliver Schinagl <oliver@schinagl.nl>
Date: Thu, 9 Jun 2005 13:44:35 +0000
Subject: Added one function to write file

---
 src/c_marker.c | 47 ++++++++++-------------------------------------
 1 file changed, 10 insertions(+), 37 deletions(-)

diff --git a/src/c_marker.c b/src/c_marker.c
index c6e1837..20d828b 100644
--- a/src/c_marker.c
+++ b/src/c_marker.c
@@ -14,34 +14,6 @@
 #include "morecfg.h"
 #include "jpeglib.h"
 
-/*
- * jpeg_natural_order[i] is the natural-order position of the i'th element
- * of zigzag order.
- *
- * When reading corrupted data, the Huffman decoders could attempt
- * to reference an entry beyond the end of this array (if the decoded
- * zero run length reaches past the end of the block).  To prevent
- * wild stores without adding an inner-loop test, we put some extra
- * "63"s after the real entries.  This will cause the extra coefficient
- * to be stored in location 63 of the block, not somewhere random.
- * The worst case would be a run-length of 15, which means we need 16
- * fake entries.
- */
-
-const int jpeg_natural_order[DCTSIZE2+16] = {
-  0,  1,  8, 16,  9,  2,  3, 10,
- 17, 24, 32, 25, 18, 11,  4,  5,
- 12, 19, 26, 33, 40, 48, 41, 34,
- 27, 20, 13,  6,  7, 14, 21, 28,
- 35, 42, 49, 56, 57, 50, 43, 36,
- 29, 22, 15, 23, 30, 37, 44, 51,
- 58, 59, 52, 45, 38, 31, 39, 46,
- 53, 60, 61, 54, 47, 55, 62, 63,
- 63, 63, 63, 63, 63, 63, 63, 63, /* extra entries for safety in decoder */
- 63, 63, 63, 63, 63, 63, 63, 63
-};
-
-
 typedef enum {			/* JPEG marker codes */
   M_SOF0  = 0xc0,
   M_SOF1  = 0xc1,
@@ -207,6 +179,7 @@ int emit_dqt (my_destination_mgr *destination, int index)
 {
   /* Quantization table is externally globally defined */
   extern JQUANT_TBL qtbl;
+  extern const int jpeg_natural_order[];
   int prec;
   int i;
 
@@ -230,7 +203,7 @@ int emit_dqt (my_destination_mgr *destination, int index)
 
     for (i = 0; i < DCTSIZE2; i++) {
       /* The table entries must be emitted in zigzag order. */
-      unsigned int qval = qtbl.quantval[i];
+      unsigned int qval = qtbl.quantval[jpeg_natural_order[i]];
 
       if (prec) {
 	emit_byte(destination, (int) (qval >> 8));
@@ -670,12 +643,11 @@ void jinit_marker_writer (j_compress_ptr cinfo) {
 }
 #endif
 
-int main(void) {
-	int retval;
+#endif
+void write_jpeg_file(JOCTET *entropy_data, int nsymbols) {
 	my_destination_mgr destination;
 	size_t datacount;
-
-	retval = 0;
+	int symbol_index;
 
 	/* Initialize destination structure */
 	destination.pub.next_output_byte = destination.buffer;
@@ -688,6 +660,10 @@ int main(void) {
 	write_frame_header(&destination, 640, 480);
 	write_scan_header(&destination);
 	/* write image here */
+	for (symbol_index = nsymbols ;symbol_index < nsymbols; symbol_index++) {
+		emit_byte(&destination, entropy_data[symbol_index]);
+	}
+	/*
 	emit_byte(&destination, 0xa6);
 	emit_byte(&destination, 0x17);
 	emit_byte(&destination, 0x11);
@@ -700,7 +676,7 @@ int main(void) {
 	emit_byte(&destination, 0xe4);
 	emit_byte(&destination, 0xce);
 	emit_byte(&destination, 0x6b);
-
+*/
 	/* finish up */
 	write_file_trailer(&destination);
 
@@ -718,7 +694,4 @@ int main(void) {
 		exit(1);
 	}
 	fclose(destination.outfile);
-
-	return retval;
 }
-#endif
-- 
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