X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=bitstream.c;h=e9f7126e00fd7392d72dbf414a5e4aeef35c3fa7;hp=e081d0cf61ad7b711065d3d7c4844a3a9691f148;hb=898769a86f1881871bc778135395fd6f4a6129a1;hpb=a4ae014c7b47509d236ddc7a63a3510079470382

diff --git a/bitstream.c b/bitstream.c
index e081d0cf..e9f7126e 100644
--- a/bitstream.c
+++ b/bitstream.c
@@ -43,34 +43,28 @@
 	} \
 }
 
-static int alloc_table(struct vlc *vlc, int size)
+static void alloc_table(struct vlc *vlc, int size)
 {
-	int idx;
-
-	idx = vlc->table_size;
 	vlc->table_size += size;
 	if (vlc->table_size > vlc->table_allocated) {
 		vlc->table_allocated += (1 << vlc->bits);
 		vlc->table = para_realloc(vlc->table,
 			sizeof(VLC_TYPE) * 2 * vlc->table_allocated);
 	}
-	return idx;
 }
 
 static int build_table(struct vlc *vlc, int table_nb_bits, int nb_codes,
 		const void *bits, const void *codes, int codes_wrap,
 		int codes_size, uint32_t code_prefix, int n_prefix)
 {
-	int ret, i, j, k, n, table_size, table_index, nb, n1, idx, code_prefix2,
+	int i, j, k, n, table_size, table_index, nb, n1, idx, code_prefix2,
 		symbol;
 	uint32_t code;
 	VLC_TYPE(*table)[2];
 
 	table_size = 1 << table_nb_bits;
-	ret = alloc_table(vlc, table_size);
-	if (ret < 0)
-		return ret;
-	table_index = ret;
+	table_index = vlc->table_size;
+	alloc_table(vlc, table_size);
 	table = &vlc->table[table_index];
 
 	for (i = 0; i < table_size; i++) {
@@ -78,7 +72,7 @@ static int build_table(struct vlc *vlc, int table_nb_bits, int nb_codes,
 		table[i][0] = -1;	//codes
 	}
 
-	/* first pass: map codes and compute auxillary table sizes */
+	/* map codes and compute auxillary table sizes */
 	for (i = 0; i < nb_codes; i++) {
 		GET_DATA(n, bits, i, 1, 1);
 		GET_DATA(code, codes, i, codes_wrap, codes_size);
@@ -95,8 +89,10 @@ static int build_table(struct vlc *vlc, int table_nb_bits, int nb_codes,
 				j = (code << (table_nb_bits - n)) & (table_size - 1);
 				nb = 1 << (table_nb_bits - n);
 				for (k = 0; k < nb; k++) {
-					if (table[j][1] /* bits */ != 0)
-						return -E_BAD_CODES;
+					if (table[j][1] /* bits */ != 0) {
+						PARA_EMERG_LOG("detected incorrect code\n");
+						exit(EXIT_FAILURE);
+					}
 					table[j][1] = n;	//bits
 					table[j][0] = symbol;
 					j++;
@@ -113,7 +109,7 @@ static int build_table(struct vlc *vlc, int table_nb_bits, int nb_codes,
 		}
 	}
 
-	/* second pass : fill auxillary tables recursively */
+	/* fill auxillary tables recursively */
 	for (i = 0; i < table_size; i++) {
 		n = table[i][1];	//bits
 		if (n < 0) {
@@ -122,14 +118,11 @@ static int build_table(struct vlc *vlc, int table_nb_bits, int nb_codes,
 				n = table_nb_bits;
 				table[i][1] = -n;	//bits
 			}
-			ret = build_table(vlc, n, nb_codes,
+			idx = build_table(vlc, n, nb_codes,
 				bits, codes, codes_wrap, codes_size,
 				(code_prefix << table_nb_bits) | i,
 				n_prefix + table_nb_bits);
-			if (ret < 0)
-				return ret;
-			idx = ret;
-			/* note: realloc has been done, so reload tables */
+			/* vlc->table might have changed */
 			table = &vlc->table[table_index];
 			table[i][0] = idx;	//code
 		}
@@ -162,22 +155,17 @@ static int build_table(struct vlc *vlc, int table_nb_bits, int nb_codes,
  * The wrap and size parameters allow to use any memory configuration and
  * types (byte/word/long) to store the bits and codes tables.
  */
-int init_vlc(struct vlc *vlc, int nb_bits, int nb_codes,
+void init_vlc(struct vlc *vlc, int nb_bits, int nb_codes,
 		const void *bits, const void *codes, int codes_wrap,
 		int codes_size)
 {
-	int ret;
-
-	PARA_INFO_LOG("nb_codes=%d\n", nb_codes);
+	PARA_INFO_LOG("nb_codes: %d\n", nb_codes);
 	vlc->bits = nb_bits;
 	vlc->table = NULL;
 	vlc->table_allocated = 0;
 	vlc->table_size = 0;
-	ret = build_table(vlc, nb_bits, nb_codes, bits,
+	build_table(vlc, nb_bits, nb_codes, bits,
 		codes, codes_wrap, codes_size, 0, 0);
-	if (ret < 0)
-		freep(&vlc->table);
-	return ret;
 }
 
 void free_vlc(struct vlc *vlc)