(commit by michael)

mmx & mmx2 quantizer
c dct permutation bugfix
dont copy input on intra only encodings if it can be avoided
dont draw edges on intra only stuff

Originally committed as revision 281 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 45 insertions, 0 deletions

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 1d003cf5b9..701cb9969a 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -49,6 +49,12 @@ UINT8 zigzag_direct[64] = {
     53, 60, 61, 54, 47, 55, 62, 63
 };
 
+/* not permutated inverse zigzag_direct + 1 for MMX quantizer */
+UINT16 __align8 inv_zigzag_direct16[64];
+
+/* not permutated zigzag_direct for MMX quantizer */
+UINT8 zigzag_direct_noperm[64];
+
 UINT8 ff_alternate_horizontal_scan[64] = {
     0,  1,  2,  3,  8,  9, 16, 17, 
     10, 11,  4,  5,  6,  7, 15, 14,
@@ -83,6 +89,42 @@ static UINT8 simple_mmx_permutation[64]={
 	0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
 };
 
+/* a*inverse[b]>>32 == a/b for all 0<=a<=65536 && 2<=b<=255 */
+UINT32 inverse[256]={
+         0, 4294967295U,2147483648U,1431655766, 1073741824,  858993460,  715827883,  613566757, 
+ 536870912,  477218589,  429496730,  390451573,  357913942,  330382100,  306783379,  286331154, 
+ 268435456,  252645136,  238609295,  226050911,  214748365,  204522253,  195225787,  186737709, 
+ 178956971,  171798692,  165191050,  159072863,  153391690,  148102321,  143165577,  138547333, 
+ 134217728,  130150525,  126322568,  122713352,  119304648,  116080198,  113025456,  110127367, 
+ 107374183,  104755300,  102261127,   99882961,   97612894,   95443718,   93368855,   91382283, 
+  89478486,   87652394,   85899346,   84215046,   82595525,   81037119,   79536432,   78090315, 
+  76695845,   75350304,   74051161,   72796056,   71582789,   70409300,   69273667,   68174085, 
+  67108864,   66076420,   65075263,   64103990,   63161284,   62245903,   61356676,   60492498, 
+  59652324,   58835169,   58040099,   57266231,   56512728,   55778797,   55063684,   54366675, 
+  53687092,   53024288,   52377650,   51746594,   51130564,   50529028,   49941481,   49367441, 
+  48806447,   48258060,   47721859,   47197443,   46684428,   46182445,   45691142,   45210183, 
+  44739243,   44278014,   43826197,   43383509,   42949673,   42524429,   42107523,   41698712, 
+  41297763,   40904451,   40518560,   40139882,   39768216,   39403370,   39045158,   38693400, 
+  38347923,   38008561,   37675152,   37347542,   37025581,   36709123,   36398028,   36092163, 
+  35791395,   35495598,   35204650,   34918434,   34636834,   34359739,   34087043,   33818641, 
+  33554432,   33294321,   33038210,   32786010,   32537632,   32292988,   32051995,   31814573, 
+  31580642,   31350127,   31122952,   30899046,   30678338,   30460761,   30246249,   30034737, 
+  29826162,   29620465,   29417585,   29217465,   29020050,   28825284,   28633116,   28443493, 
+  28256364,   28071682,   27889399,   27709467,   27531842,   27356480,   27183338,   27012373, 
+  26843546,   26676816,   26512144,   26349493,   26188825,   26030105,   25873297,   25718368, 
+  25565282,   25414008,   25264514,   25116768,   24970741,   24826401,   24683721,   24542671, 
+  24403224,   24265352,   24129030,   23994231,   23860930,   23729102,   23598722,   23469767, 
+  23342214,   23216040,   23091223,   22967740,   22845571,   22724695,   22605092,   22486740, 
+  22369622,   22253717,   22139007,   22025474,   21913099,   21801865,   21691755,   21582751, 
+  21474837,   21367997,   21262215,   21157475,   21053762,   20951060,   20849356,   20748635, 
+  20648882,   20550083,   20452226,   20355296,   20259280,   20164166,   20069941,   19976593, 
+  19884108,   19792477,   19701685,   19611723,   19522579,   19434242,   19346700,   19259944, 
+  19173962,   19088744,   19004281,   18920561,   18837576,   18755316,   18673771,   18592933, 
+  18512791,   18433337,   18354562,   18276457,   18199014,   18122225,   18046082,   17970575, 
+  17895698,   17821442,   17747799,   17674763,   17602325,   17530479,   17459217,   17388532, 
+  17318417,   17248865,   17179870,   17111424,   17043522,   16976156,   16909321,   16843010,
+};
+
 /* used to skip zeros at the end */
 UINT8 zigzag_end[64];
 
@@ -515,6 +557,9 @@ void dsputil_init(void)
     else
         for(i=0; i<64; i++) permutation[i]=i;
 
+    for(i=0; i<64; i++) inv_zigzag_direct16[zigzag_direct[i]]= i+1;
+    for(i=0; i<64; i++) zigzag_direct_noperm[i]= zigzag_direct[i];
+    
     if (use_permuted_idct) {
         /* permute for IDCT */
         for(i=0;i<64;i++) {