Documentation patch by anonymous

Originally committed as revision 3914 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/vc9data.h

@@ -7,7 +7,7 @@
 #define VC9DATA_H
 
 /* Set a method for reading VLC in NORM6 bitplane decoding */
-#define TILE_VLC_METHOD    1
+#define VLC_NORM6_METH0D    1
 
 /* bfraction is fractional, we scale to the GCD 3*5*7*8 = 840 */
 const int16_t vc9_bfraction_lut[23] = {
@@ -74,7 +74,7 @@ static const uint8_t vc9_norm2_bits[4] = {
   1, 3, 3, 2
 };
 
-#if TILE_VLC_METHOD == 1
+#if VLC_NORM6_METH0D == 1
 static const uint16_t vc9_norm6_codes[64] = {
 0x001, 0x002, 0x003, 0x000, 0x004, 0x001, 0x002, 0x047, 0x005, 0x003, 0x004, 0x04B, 0x005, 0x04D, 0x04E, 0x30E, 
 0x006, 0x006, 0x007, 0x053, 0x008, 0x055, 0x056, 0x30D, 0x009, 0x059, 0x05A, 0x30C, 0x05C, 0x30B, 0x30A, 0x037, 
@@ -157,34 +157,19 @@ static const uint8_t vc9_norm6_spec[64][5] = {
 };
 #endif
 
-#if TILE_VLC_METHOD == 2 //Hyper-stupid way to handle sparse tables
-static const uint8_t vc9_norm6_first[2][64] = {
+//Mechanical way, handling sparse/incomplete tables
+#if VLC_NORM6_METH0D == 2
+//(2,5) is VLC+FLC, (3,5) double VLC
+static const uint8_t vc9_norm6_first[24][2] = {
     {  1, 1}, {  2, 4}, {  3, 4}, {  0, 8},
-    {  4, 4}, {  5, 1}, {  2, 8}, {  2, 5},
-    {  5, 4}, {  3, 8}, {  4, 8}, {  2, 5},
-    {  5, 8}, {  2, 5}, {  2, 5}, {  3, 5},
-    {  6, 4}, {  6, 8}, {  7, 8}, {  2, 5},
-    {  8, 8}, {  2, 5}, {  2, 5}, {  3, 5},
-    {  9, 8}, {  2, 5}, {  2, 5}, {  3, 5},
-    {  2, 5}, {  3, 5}, {  3, 5}, {  3, 5},
-    {  7, 4}, { 10, 8}, { 11, 8}, {  2, 5},
-    { 12, 8}, {  2, 5}, {  2, 5}, {  3, 5},
-    { 13, 8}, {  2, 5}, {  2, 5}, {  3, 5},
-    {  2, 5}, {  3, 5}, {  3, 5}, {  3, 5},
-    { 14, 8}, {  2, 5}, {  2, 5}, {  3, 5},
-    {  2, 5}, {  3, 5}, {  3, 5}, {  3, 5},
-    {  2, 5}, {  3, 5}, {  3, 5}, {  3, 5},
-    {  3, 5}, {  3, 5}, {  3, 5}, {  3, 5}
+    {  4, 4}, {  1, 8}, {  2, 8}, {  5, 4},
+    {  3, 8}, {  4, 8}, {  5, 8}, {  6, 4},
+    {  6, 8}, {  7, 8}, {  8, 8}, {  9, 8},
+    {  7, 4}, { 10, 8}, { 11, 8}, { 12, 8},
+    { 13, 8}, { 14, 8}, {  2, 5}, {  3, 5}
 };
 
-/* 0=>simple VLC, 1=>VLCFLC, 2=>double VLC */
-static const int vc9_norm6_mode[64] = {
-    0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 2,
-    0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 1, 2, 2, 2,
-    0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 1, 2, 2, 2,
-    0, 1, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2
-};
-static const uint8_t vc9_norm6_second[22] = {
+static const uint8_t vc9_norm6_second[22][2] = {
     { 14, 8}, { 13, 8}, { 12, 8}, { 11, 8},
     { 10, 8}, {  7, 4}, {  9, 8}, {  8, 8},
     {  7, 8}, {  6, 8}, {  6, 4}, {  5, 8},