add huffman encoding ontop of the rle

avr/usbload/huffman-decode.c

@@ -18,12 +18,12 @@
  */
 
 
+#include "huffman-decode.h"
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 
-#include "huffman-decode.h"
 #include "info.h"
 #include "debug.h"
 
@@ -44,7 +44,7 @@
 
 #define ALLOC_ERROR {}
 
-#undef BLOCK_ALLOC 1
+#undef BLOCK_ALLOC 
 
 typedef struct {
 	int16_t value;
@@ -125,9 +125,9 @@ uint8_t build_tree(huffman_dec_ctx_t* ctx){
 	if(treesize>0x1ff)
 		return 2;
 #if BLOCK_ALLOC	
-	ctx->tree = calloc(2*treesize-1, sizeof(node_t));
+	ctx->tree = malloc((2*treesize-1) * sizeof(node_t));
 #else
-	ctx->tree = calloc(1, sizeof(node_t));
+	ctx->tree = malloc(sizeof(node_t));
 #endif
 	((node_t*)(ctx->tree))->value = V_NODE;
 	uint16_t depth=0;
@@ -166,7 +166,7 @@ uint8_t build_tree(huffman_dec_ctx_t* ctx){
 #if BLOCK_ALLOC
 					current->left=&(((node_t*)(ctx->tree))[treeindex++]);
 #else
-					current->left=calloc(1, sizeof(node_t));
+					current->left=malloc(sizeof(node_t));
 #endif
 					((node_t*)(current->left))->value = V_NODE;
 				}
@@ -179,7 +179,7 @@ uint8_t build_tree(huffman_dec_ctx_t* ctx){
 #if BLOCK_ALLOC
 					current->right=&(((node_t*)(ctx->tree))[treeindex++]);
 #else
-					current->right=calloc(1, sizeof(node_t));
+					current->right=malloc( sizeof(node_t));
 #endif
 					((node_t*)(current->right))->value=V_NODE;
 				}

avr/usbload/main.c

@@ -370,18 +370,17 @@ uint16_t read_byte_pgm(uint16_t addr){
 	return pgm_read_byte((PGM_VOID_P)addr);
 }
 
-uint16_t read_byte_ee(uint16_t addr){
+void decompress_huffman(PGM_VOID_P addr, uint16_t(*fp)(uint16_t)){
-	return eeprom_read_byte((uint8_t*)addr);
-}
-
-
-void decompress(PGM_VOID_P addr, uint16_t(*fp)(uint16_t)){
 	uint16_t c;
 	uint32_t i = 0;
 	huffman_dec_ctx_t ctx;
+	info("ok1\n");
 	huffman_dec_init(&ctx, fp);
+    info("ok2\n");
 	huffman_dec_set_addr(&ctx, (uint16_t)addr);
+    info("ok3\n");
 	while(1){
+        info("ok4\n");
         i++;
 		c=huffman_dec_byte(&ctx);
         if (i%1024==0)
@@ -394,15 +393,6 @@ void decompress(PGM_VOID_P addr, uint16_t(*fp)(uint16_t)){
 	}
 }
 
-void decompress_huffman(void){
-    info("Decompress Rom %p to 0x000000\n",(void*)_rom);
-	sram_bulk_write_start(0x000000);
-    decompress(&_rom,read_byte_pgm);
-	sram_bulk_write_end();
-    info("Done\n");
-}
-
-
 
 void send_reset(){
     info("Reset Snes\n");
@@ -464,18 +454,13 @@ void boot_startup_rom(){
     snes_lorom();
     info("Set Snes lowrom \n");
 
-/*    
-    info("Set Snes hirom\n");
-    snes_hirom();
     
-    info("Disable snes WR\n");
+    info("Huffman decompress to 0x010000\n",(void*)_rom);
-    snes_wr_disable(); 
+	sram_bulk_write_start(0x010000);
-    
+    decompress_huffman(&_rom,read_byte_pgm);
-    info("IRQ off\n");
+	sram_bulk_write_end();
-    snes_irq_lo();
+    info("RLE decompress to 0x000000\n",(void*)_rom);
-    snes_irq_off();
+    rle_decode_sram(0x010000, ROM_RLE_SIZE, 0x000000);
-*/  
-    rle_decode(&_rom, ROM_SIZE, 0x000000);
     dump_memory(0x10000 - 0x100, 0x10000);
  
     snes_reset_hi();

avr/usbload/rle.c

@@ -96,3 +96,62 @@ uint8_t rle_decode(PGM_VOID_P in_addr, int32_t in_len, uint32_t out_addr)
 	return 0;
 }
 
+
+uint8_t rle_decode_sram(uint32_t in_addr, int32_t in_len, uint32_t out_addr)
+{
+	uint8_t in_byte, in_repeat, last_byte;
+	uint32_t out_len, out_len_left;
+    info("RLE decode len=%li addr=0x%08lx\n",in_len,out_addr);
+    last_byte = 0;
+	out_len_left = out_len;
+#define INBYTE(b) \
+	do { \
+	         if ( --in_len < 0 ) { \
+			   return 1; \
+		 } \
+         b = sram_read(in_addr);\
+         in_addr++;\
+	} while(0)
+
+#define OUTBYTE(b) \
+	do { \
+        sram_write(out_addr,b);\
+        out_addr++;\
+	} while(0)
+
+	INBYTE(in_byte);
+
+	if (in_byte == RUNCHAR) {
+		INBYTE(in_repeat);
+		if (in_repeat != 0) {
+			info("Orphaned RLE code at start\n");
+			return 1;
+		}
+		OUTBYTE(RUNCHAR);
+	} else {
+		OUTBYTE(in_byte);
+	}
+
+	while( in_len > 0 ) {
+		INBYTE(in_byte);
+        if (in_len%1024==0)
+            info(".");
+		if (in_byte == RUNCHAR) {
+			INBYTE(in_repeat);
+			if ( in_repeat == 0 ) {
+				/* Just an escaped RUNCHAR value */
+				OUTBYTE(RUNCHAR);
+			} else {
+				/* Pick up value and output a sequence of it */
+                in_byte = last_byte; //;out_data[-1];
+				while ( --in_repeat > 0 )
+					OUTBYTE(in_byte);
+			}
+		} else {
+			/* Normal byte */
+			OUTBYTE(in_byte);
+		}
+        last_byte = in_byte;
+	}
+	return 0;
+}

avr/usbload/rle.h

@@ -24,5 +24,6 @@
 #include <avr/pgmspace.h>       
 
 uint8_t rle_decode(PGM_VOID_P in_addr,uint32_t in_len, uint32_t out_addr);
+uint8_t rle_decode_sram(uint32_t in_addr, int32_t in_len, uint32_t out_addr);
 
 #endif