merge clip() into the alpha/beta/tc0 tables (10% faster filter_mb_fast() on P3)

Originally committed as revision 6863 to svn://svn.ffmpeg.org/ffmpeg/trunk

2 files changed, 64 insertions, 30 deletions

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 440c254bf2..67754fb5ec 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -6739,14 +6739,14 @@ decode_intra_mb:
 
 static void filter_mb_edgev( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
     int i, d;
-    const int index_a = clip( qp + h->slice_alpha_c0_offset, 0, 51 );
-    const int alpha = alpha_table[index_a];
-    const int beta  = beta_table[clip( qp + h->slice_beta_offset, 0, 51 )];
+    const int index_a = qp + h->slice_alpha_c0_offset;
+    const int alpha = (alpha_table+52)[index_a];
+    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
 
     if( bS[0] < 4 ) {
         int8_t tc[4];
         for(i=0; i<4; i++)
-            tc[i] = bS[i] ? tc0_table[index_a][bS[i] - 1] : -1;
+            tc[i] = bS[i] ? (tc0_table+52)[index_a][bS[i] - 1] : -1;
         h->s.dsp.h264_h_loop_filter_luma(pix, stride, alpha, beta, tc);
     } else {
         /* 16px edge length, because bS=4 is triggered by being at
@@ -6800,14 +6800,14 @@ static void filter_mb_edgev( H264Context *h, uint8_t *pix, int stride, int16_t b
 }
 static void filter_mb_edgecv( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
     int i;
-    const int index_a = clip( qp + h->slice_alpha_c0_offset, 0, 51 );
-    const int alpha = alpha_table[index_a];
-    const int beta  = beta_table[clip( qp + h->slice_beta_offset, 0, 51 )];
+    const int index_a = qp + h->slice_alpha_c0_offset;
+    const int alpha = (alpha_table+52)[index_a];
+    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
 
     if( bS[0] < 4 ) {
         int8_t tc[4];
         for(i=0; i<4; i++)
-            tc[i] = bS[i] ? tc0_table[index_a][bS[i] - 1] + 1 : 0;
+            tc[i] = bS[i] ? (tc0_table+52)[index_a][bS[i] - 1] + 1 : 0;
         h->s.dsp.h264_h_loop_filter_chroma(pix, stride, alpha, beta, tc);
     } else {
         h->s.dsp.h264_h_loop_filter_chroma_intra(pix, stride, alpha, beta);
@@ -6833,12 +6833,12 @@ static void filter_mb_mbaff_edgev( H264Context *h, uint8_t *pix, int stride, int
         }
 
         qp_index = MB_FIELD ? (i >> 3) : (i & 1);
-        index_a = clip( qp[qp_index] + h->slice_alpha_c0_offset, 0, 51 );
-        alpha = alpha_table[index_a];
-        beta  = beta_table[clip( qp[qp_index] + h->slice_beta_offset, 0, 51 )];
+        index_a = qp[qp_index] + h->slice_alpha_c0_offset;
+        alpha = (alpha_table+52)[index_a];
+        beta  = (beta_table+52)[qp[qp_index] + h->slice_beta_offset];
 
         if( bS[bS_index] < 4 ) {
-            const int tc0 = tc0_table[index_a][bS[bS_index] - 1];
+            const int tc0 = (tc0_table+52)[index_a][bS[bS_index] - 1];
             const int p0 = pix[-1];
             const int p1 = pix[-2];
             const int p2 = pix[-3];
@@ -6927,12 +6927,12 @@ static void filter_mb_mbaff_edgecv( H264Context *h, uint8_t *pix, int stride, in
         }
 
         qp_index = MB_FIELD ? (i >> 2) : (i & 1);
-        index_a = clip( qp[qp_index] + h->slice_alpha_c0_offset, 0, 51 );
-        alpha = alpha_table[index_a];
-        beta  = beta_table[clip( qp[qp_index] + h->slice_beta_offset, 0, 51 )];
+        index_a = qp[qp_index] + h->slice_alpha_c0_offset;
+        alpha = (alpha_table+52)[index_a];
+        beta  = (beta_table+52)[qp[qp_index] + h->slice_beta_offset];
 
         if( bS[bS_index] < 4 ) {
-            const int tc = tc0_table[index_a][bS[bS_index] - 1] + 1;
+            const int tc = (tc0_table+52)[index_a][bS[bS_index] - 1] + 1;
             const int p0 = pix[-1];
             const int p1 = pix[-2];
             const int q0 = pix[0];
@@ -6967,15 +6967,15 @@ static void filter_mb_mbaff_edgecv( H264Context *h, uint8_t *pix, int stride, in
 
 static void filter_mb_edgeh( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
     int i, d;
-    const int index_a = clip( qp + h->slice_alpha_c0_offset, 0, 51 );
-    const int alpha = alpha_table[index_a];
-    const int beta  = beta_table[clip( qp + h->slice_beta_offset, 0, 51 )];
+    const int index_a = qp + h->slice_alpha_c0_offset;
+    const int alpha = (alpha_table+52)[index_a];
+    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
     const int pix_next  = stride;
 
     if( bS[0] < 4 ) {
         int8_t tc[4];
         for(i=0; i<4; i++)
-            tc[i] = bS[i] ? tc0_table[index_a][bS[i] - 1] : -1;
+            tc[i] = bS[i] ? (tc0_table+52)[index_a][bS[i] - 1] : -1;
         h->s.dsp.h264_v_loop_filter_luma(pix, stride, alpha, beta, tc);
     } else {
         /* 16px edge length, see filter_mb_edgev */
@@ -7027,14 +7027,14 @@ static void filter_mb_edgeh( H264Context *h, uint8_t *pix, int stride, int16_t b
 
 static void filter_mb_edgech( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
     int i;
-    const int index_a = clip( qp + h->slice_alpha_c0_offset, 0, 51 );
-    const int alpha = alpha_table[index_a];
-    const int beta  = beta_table[clip( qp + h->slice_beta_offset, 0, 51 )];
+    const int index_a = qp + h->slice_alpha_c0_offset;
+    const int alpha = (alpha_table+52)[index_a];
+    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
 
     if( bS[0] < 4 ) {
         int8_t tc[4];
         for(i=0; i<4; i++)
-            tc[i] = bS[i] ? tc0_table[index_a][bS[i] - 1] + 1 : 0;
+            tc[i] = bS[i] ? (tc0_table+52)[index_a][bS[i] - 1] + 1 : 0;
         h->s.dsp.h264_v_loop_filter_chroma(pix, stride, alpha, beta, tc);
     } else {
         h->s.dsp.h264_v_loop_filter_chroma_intra(pix, stride, alpha, beta);
diff --git a/libavcodec/h264data.h b/libavcodec/h264data.h
index 295c8df123..2dea3580f7 100644
--- a/libavcodec/h264data.h
+++ b/libavcodec/h264data.h
@@ -609,23 +609,48 @@ static const int quant_coeff[52][16]={
 
 
 /* Deblocking filter (p153) */
-static const int alpha_table[52] = {
+static const int alpha_table[52*3] = {
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
      0,  0,  0,  0,  0,  0,  4,  4,  5,  6,
      7,  8,  9, 10, 12, 13, 15, 17, 20, 22,
     25, 28, 32, 36, 40, 45, 50, 56, 63, 71,
     80, 90,101,113,127,144,162,182,203,226,
-    255, 255
+   255,255,
+   255,255,255,255,255,255,255,255,255,255,255,255,255,
+   255,255,255,255,255,255,255,255,255,255,255,255,255,
+   255,255,255,255,255,255,255,255,255,255,255,255,255,
+   255,255,255,255,255,255,255,255,255,255,255,255,255,
 };
-static const int beta_table[52] = {
+static const int beta_table[52*3] = {
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
      0,  0,  0,  0,  0,  0,  2,  2,  2,  3,
      3,  3,  3,  4,  4,  4,  6,  6,  7,  7,
      8,  8,  9,  9, 10, 10, 11, 11, 12, 12,
     13, 13, 14, 14, 15, 15, 16, 16, 17, 17,
-    18, 18
+    18, 18,
+    18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+    18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+    18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+    18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
 };
-static const int tc0_table[52][3] = {
+static const int tc0_table[52*3][3] = {
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
+    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
     { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
     { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
     { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 1 },
@@ -634,7 +659,16 @@ static const int tc0_table[52][3] = {
     { 1, 1, 2 }, { 1, 2, 3 }, { 1, 2, 3 }, { 2, 2, 3 }, { 2, 2, 4 }, { 2, 3, 4 },
     { 2, 3, 4 }, { 3, 3, 5 }, { 3, 4, 6 }, { 3, 4, 6 }, { 4, 5, 7 }, { 4, 5, 8 },
     { 4, 6, 9 }, { 5, 7,10 }, { 6, 8,11 }, { 6, 8,13 }, { 7,10,14 }, { 8,11,16 },
-    { 9,12,18 }, {10,13,20 }, {11,15,23 }, {13,17,25 }
+    { 9,12,18 }, {10,13,20 }, {11,15,23 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
+    {13,17,25 }, {13,17,25 }, {13,17,25 }, {13,17,25 },
 };
 
 /* Cabac pre state table */