Move encoder-specific quantize_c and related tables to the H.264 encoder.

Originally committed as revision 15937 to svn://svn.ffmpeg.org/ffmpeg/trunk

3 files changed, 138 insertions, 136 deletions

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 6782d7f076..e31500f15f 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -1587,85 +1587,6 @@ static inline int get_chroma_qp(H264Context *h, int t, int qscale){
     return h->pps.chroma_qp_table[t][qscale];
 }
 
-//FIXME need to check that this does not overflow signed 32 bit for low qp, I am not sure, it's very close
-//FIXME check that gcc inlines this (and optimizes intra & separate_dc stuff away)
-static inline int quantize_c(DCTELEM *block, uint8_t *scantable, int qscale, int intra, int separate_dc){
-    int i;
-    const int * const quant_table= quant_coeff[qscale];
-    const int bias= intra ? (1<<QUANT_SHIFT)/3 : (1<<QUANT_SHIFT)/6;
-    const unsigned int threshold1= (1<<QUANT_SHIFT) - bias - 1;
-    const unsigned int threshold2= (threshold1<<1);
-    int last_non_zero;
-
-    if(separate_dc){
-        if(qscale<=18){
-            //avoid overflows
-            const int dc_bias= intra ? (1<<(QUANT_SHIFT-2))/3 : (1<<(QUANT_SHIFT-2))/6;
-            const unsigned int dc_threshold1= (1<<(QUANT_SHIFT-2)) - dc_bias - 1;
-            const unsigned int dc_threshold2= (dc_threshold1<<1);
-
-            int level= block[0]*quant_coeff[qscale+18][0];
-            if(((unsigned)(level+dc_threshold1))>dc_threshold2){
-                if(level>0){
-                    level= (dc_bias + level)>>(QUANT_SHIFT-2);
-                    block[0]= level;
-                }else{
-                    level= (dc_bias - level)>>(QUANT_SHIFT-2);
-                    block[0]= -level;
-                }
-//                last_non_zero = i;
-            }else{
-                block[0]=0;
-            }
-        }else{
-            const int dc_bias= intra ? (1<<(QUANT_SHIFT+1))/3 : (1<<(QUANT_SHIFT+1))/6;
-            const unsigned int dc_threshold1= (1<<(QUANT_SHIFT+1)) - dc_bias - 1;
-            const unsigned int dc_threshold2= (dc_threshold1<<1);
-
-            int level= block[0]*quant_table[0];
-            if(((unsigned)(level+dc_threshold1))>dc_threshold2){
-                if(level>0){
-                    level= (dc_bias + level)>>(QUANT_SHIFT+1);
-                    block[0]= level;
-                }else{
-                    level= (dc_bias - level)>>(QUANT_SHIFT+1);
-                    block[0]= -level;
-                }
-//                last_non_zero = i;
-            }else{
-                block[0]=0;
-            }
-        }
-        last_non_zero= 0;
-        i=1;
-    }else{
-        last_non_zero= -1;
-        i=0;
-    }
-
-    for(; i<16; i++){
-        const int j= scantable[i];
-        int level= block[j]*quant_table[j];
-
-//        if(   bias+level >= (1<<(QMAT_SHIFT - 3))
-//           || bias-level >= (1<<(QMAT_SHIFT - 3))){
-        if(((unsigned)(level+threshold1))>threshold2){
-            if(level>0){
-                level= (bias + level)>>QUANT_SHIFT;
-                block[j]= level;
-            }else{
-                level= (bias - level)>>QUANT_SHIFT;
-                block[j]= -level;
-            }
-            last_non_zero = i;
-        }else{
-            block[j]=0;
-        }
-    }
-
-    return last_non_zero;
-}
-
 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
                            int src_x_offset, int src_y_offset,
diff --git a/libavcodec/h264data.h b/libavcodec/h264data.h
index decdd932ef..4031d9dd65 100644
--- a/libavcodec/h264data.h
+++ b/libavcodec/h264data.h
@@ -513,63 +513,6 @@ static const uint8_t dequant8_coeff_init[6][6]={
   {36,32,58,34,46,43},
 };
 
-#define QUANT_SHIFT 22
-
-static const int quant_coeff[52][16]={
-    { 419430,258111,419430,258111,258111,167772,258111,167772,419430,258111,419430,258111,258111,167772,258111,167772,},
-    { 381300,239675,381300,239675,239675,149131,239675,149131,381300,239675,381300,239675,239675,149131,239675,149131,},
-    { 322639,209715,322639,209715,209715,134218,209715,134218,322639,209715,322639,209715,209715,134218,209715,134218,},
-    { 299593,186414,299593,186414,186414,116711,186414,116711,299593,186414,299593,186414,186414,116711,186414,116711,},
-    { 262144,167772,262144,167772,167772,107374,167772,107374,262144,167772,262144,167772,167772,107374,167772,107374,},
-    { 233017,145889,233017,145889,145889, 92564,145889, 92564,233017,145889,233017,145889,145889, 92564,145889, 92564,},
-    { 209715,129056,209715,129056,129056, 83886,129056, 83886,209715,129056,209715,129056,129056, 83886,129056, 83886,},
-    { 190650,119837,190650,119837,119837, 74565,119837, 74565,190650,119837,190650,119837,119837, 74565,119837, 74565,},
-    { 161319,104858,161319,104858,104858, 67109,104858, 67109,161319,104858,161319,104858,104858, 67109,104858, 67109,},
-    { 149797, 93207,149797, 93207, 93207, 58356, 93207, 58356,149797, 93207,149797, 93207, 93207, 58356, 93207, 58356,},
-    { 131072, 83886,131072, 83886, 83886, 53687, 83886, 53687,131072, 83886,131072, 83886, 83886, 53687, 83886, 53687,},
-    { 116508, 72944,116508, 72944, 72944, 46282, 72944, 46282,116508, 72944,116508, 72944, 72944, 46282, 72944, 46282,},
-    { 104858, 64528,104858, 64528, 64528, 41943, 64528, 41943,104858, 64528,104858, 64528, 64528, 41943, 64528, 41943,},
-    {  95325, 59919, 95325, 59919, 59919, 37283, 59919, 37283, 95325, 59919, 95325, 59919, 59919, 37283, 59919, 37283,},
-    {  80660, 52429, 80660, 52429, 52429, 33554, 52429, 33554, 80660, 52429, 80660, 52429, 52429, 33554, 52429, 33554,},
-    {  74898, 46603, 74898, 46603, 46603, 29178, 46603, 29178, 74898, 46603, 74898, 46603, 46603, 29178, 46603, 29178,},
-    {  65536, 41943, 65536, 41943, 41943, 26844, 41943, 26844, 65536, 41943, 65536, 41943, 41943, 26844, 41943, 26844,},
-    {  58254, 36472, 58254, 36472, 36472, 23141, 36472, 23141, 58254, 36472, 58254, 36472, 36472, 23141, 36472, 23141,},
-    {  52429, 32264, 52429, 32264, 32264, 20972, 32264, 20972, 52429, 32264, 52429, 32264, 32264, 20972, 32264, 20972,},
-    {  47663, 29959, 47663, 29959, 29959, 18641, 29959, 18641, 47663, 29959, 47663, 29959, 29959, 18641, 29959, 18641,},
-    {  40330, 26214, 40330, 26214, 26214, 16777, 26214, 16777, 40330, 26214, 40330, 26214, 26214, 16777, 26214, 16777,},
-    {  37449, 23302, 37449, 23302, 23302, 14589, 23302, 14589, 37449, 23302, 37449, 23302, 23302, 14589, 23302, 14589,},
-    {  32768, 20972, 32768, 20972, 20972, 13422, 20972, 13422, 32768, 20972, 32768, 20972, 20972, 13422, 20972, 13422,},
-    {  29127, 18236, 29127, 18236, 18236, 11570, 18236, 11570, 29127, 18236, 29127, 18236, 18236, 11570, 18236, 11570,},
-    {  26214, 16132, 26214, 16132, 16132, 10486, 16132, 10486, 26214, 16132, 26214, 16132, 16132, 10486, 16132, 10486,},
-    {  23831, 14980, 23831, 14980, 14980,  9321, 14980,  9321, 23831, 14980, 23831, 14980, 14980,  9321, 14980,  9321,},
-    {  20165, 13107, 20165, 13107, 13107,  8389, 13107,  8389, 20165, 13107, 20165, 13107, 13107,  8389, 13107,  8389,},
-    {  18725, 11651, 18725, 11651, 11651,  7294, 11651,  7294, 18725, 11651, 18725, 11651, 11651,  7294, 11651,  7294,},
-    {  16384, 10486, 16384, 10486, 10486,  6711, 10486,  6711, 16384, 10486, 16384, 10486, 10486,  6711, 10486,  6711,},
-    {  14564,  9118, 14564,  9118,  9118,  5785,  9118,  5785, 14564,  9118, 14564,  9118,  9118,  5785,  9118,  5785,},
-    {  13107,  8066, 13107,  8066,  8066,  5243,  8066,  5243, 13107,  8066, 13107,  8066,  8066,  5243,  8066,  5243,},
-    {  11916,  7490, 11916,  7490,  7490,  4660,  7490,  4660, 11916,  7490, 11916,  7490,  7490,  4660,  7490,  4660,},
-    {  10082,  6554, 10082,  6554,  6554,  4194,  6554,  4194, 10082,  6554, 10082,  6554,  6554,  4194,  6554,  4194,},
-    {   9362,  5825,  9362,  5825,  5825,  3647,  5825,  3647,  9362,  5825,  9362,  5825,  5825,  3647,  5825,  3647,},
-    {   8192,  5243,  8192,  5243,  5243,  3355,  5243,  3355,  8192,  5243,  8192,  5243,  5243,  3355,  5243,  3355,},
-    {   7282,  4559,  7282,  4559,  4559,  2893,  4559,  2893,  7282,  4559,  7282,  4559,  4559,  2893,  4559,  2893,},
-    {   6554,  4033,  6554,  4033,  4033,  2621,  4033,  2621,  6554,  4033,  6554,  4033,  4033,  2621,  4033,  2621,},
-    {   5958,  3745,  5958,  3745,  3745,  2330,  3745,  2330,  5958,  3745,  5958,  3745,  3745,  2330,  3745,  2330,},
-    {   5041,  3277,  5041,  3277,  3277,  2097,  3277,  2097,  5041,  3277,  5041,  3277,  3277,  2097,  3277,  2097,},
-    {   4681,  2913,  4681,  2913,  2913,  1824,  2913,  1824,  4681,  2913,  4681,  2913,  2913,  1824,  2913,  1824,},
-    {   4096,  2621,  4096,  2621,  2621,  1678,  2621,  1678,  4096,  2621,  4096,  2621,  2621,  1678,  2621,  1678,},
-    {   3641,  2280,  3641,  2280,  2280,  1446,  2280,  1446,  3641,  2280,  3641,  2280,  2280,  1446,  2280,  1446,},
-    {   3277,  2016,  3277,  2016,  2016,  1311,  2016,  1311,  3277,  2016,  3277,  2016,  2016,  1311,  2016,  1311,},
-    {   2979,  1872,  2979,  1872,  1872,  1165,  1872,  1165,  2979,  1872,  2979,  1872,  1872,  1165,  1872,  1165,},
-    {   2521,  1638,  2521,  1638,  1638,  1049,  1638,  1049,  2521,  1638,  2521,  1638,  1638,  1049,  1638,  1049,},
-    {   2341,  1456,  2341,  1456,  1456,   912,  1456,   912,  2341,  1456,  2341,  1456,  1456,   912,  1456,   912,},
-    {   2048,  1311,  2048,  1311,  1311,   839,  1311,   839,  2048,  1311,  2048,  1311,  1311,   839,  1311,   839,},
-    {   1820,  1140,  1820,  1140,  1140,   723,  1140,   723,  1820,  1140,  1820,  1140,  1140,   723,  1140,   723,},
-    {   1638,  1008,  1638,  1008,  1008,   655,  1008,   655,  1638,  1008,  1638,  1008,  1008,   655,  1008,   655,},
-    {   1489,   936,  1489,   936,   936,   583,   936,   583,  1489,   936,  1489,   936,   936,   583,   936,   583,},
-    {   1260,   819,  1260,   819,   819,   524,   819,   524,  1260,   819,  1260,   819,   819,   524,   819,   524,},
-    {   1170,   728,  1170,   728,   728,   456,   728,   456,  1170,   728,  1170,   728,   728,   456,   728,   456,},
-};
-
 
 /* Deblocking filter (p153) */
 static const uint8_t alpha_table[52*3] = {
diff --git a/libavcodec/h264enc.c b/libavcodec/h264enc.c
index 4a760c6229..788e0ae858 100644
--- a/libavcodec/h264enc.c
+++ b/libavcodec/h264enc.c
@@ -120,3 +120,141 @@ static const uint8_t inter_cbp_to_golomb[48] = {
     1, 32, 33, 36, 34, 37, 44, 40, 35, 45, 38, 41, 39, 42, 43, 19,
     6, 24, 25, 20, 26, 21, 46, 28, 27, 47, 22, 29, 23, 30, 31, 12
 };
+
+#define QUANT_SHIFT 22
+
+static const int quant_coeff[52][16] = {
+    { 419430, 258111, 419430, 258111, 258111, 167772, 258111, 167772, 419430, 258111, 419430, 258111, 258111, 167772, 258111, 167772,},
+    { 381300, 239675, 381300, 239675, 239675, 149131, 239675, 149131, 381300, 239675, 381300, 239675, 239675, 149131, 239675, 149131,},
+    { 322639, 209715, 322639, 209715, 209715, 134218, 209715, 134218, 322639, 209715, 322639, 209715, 209715, 134218, 209715, 134218,},
+    { 299593, 186414, 299593, 186414, 186414, 116711, 186414, 116711, 299593, 186414, 299593, 186414, 186414, 116711, 186414, 116711,},
+    { 262144, 167772, 262144, 167772, 167772, 107374, 167772, 107374, 262144, 167772, 262144, 167772, 167772, 107374, 167772, 107374,},
+    { 233017, 145889, 233017, 145889, 145889,  92564, 145889,  92564, 233017, 145889, 233017, 145889, 145889,  92564, 145889,  92564,},
+    { 209715, 129056, 209715, 129056, 129056,  83886, 129056,  83886, 209715, 129056, 209715, 129056, 129056,  83886, 129056,  83886,},
+    { 190650, 119837, 190650, 119837, 119837,  74565, 119837,  74565, 190650, 119837, 190650, 119837, 119837,  74565, 119837,  74565,},
+    { 161319, 104858, 161319, 104858, 104858,  67109, 104858,  67109, 161319, 104858, 161319, 104858, 104858,  67109, 104858,  67109,},
+    { 149797,  93207, 149797,  93207,  93207,  58356,  93207,  58356, 149797,  93207, 149797,  93207,  93207,  58356,  93207,  58356,},
+    { 131072,  83886, 131072,  83886,  83886,  53687,  83886,  53687, 131072,  83886, 131072,  83886,  83886,  53687,  83886,  53687,},
+    { 116508,  72944, 116508,  72944,  72944,  46282,  72944,  46282, 116508,  72944, 116508,  72944,  72944,  46282,  72944,  46282,},
+    { 104858,  64528, 104858,  64528,  64528,  41943,  64528,  41943, 104858,  64528, 104858,  64528,  64528,  41943,  64528,  41943,},
+    {  95325,  59919,  95325,  59919,  59919,  37283,  59919,  37283,  95325,  59919,  95325,  59919,  59919,  37283,  59919,  37283,},
+    {  80660,  52429,  80660,  52429,  52429,  33554,  52429,  33554,  80660,  52429,  80660,  52429,  52429,  33554,  52429,  33554,},
+    {  74898,  46603,  74898,  46603,  46603,  29178,  46603,  29178,  74898,  46603,  74898,  46603,  46603,  29178,  46603,  29178,},
+    {  65536,  41943,  65536,  41943,  41943,  26844,  41943,  26844,  65536,  41943,  65536,  41943,  41943,  26844,  41943,  26844,},
+    {  58254,  36472,  58254,  36472,  36472,  23141,  36472,  23141,  58254,  36472,  58254,  36472,  36472,  23141,  36472,  23141,},
+    {  52429,  32264,  52429,  32264,  32264,  20972,  32264,  20972,  52429,  32264,  52429,  32264,  32264,  20972,  32264,  20972,},
+    {  47663,  29959,  47663,  29959,  29959,  18641,  29959,  18641,  47663,  29959,  47663,  29959,  29959,  18641,  29959,  18641,},
+    {  40330,  26214,  40330,  26214,  26214,  16777,  26214,  16777,  40330,  26214,  40330,  26214,  26214,  16777,  26214,  16777,},
+    {  37449,  23302,  37449,  23302,  23302,  14589,  23302,  14589,  37449,  23302,  37449,  23302,  23302,  14589,  23302,  14589,},
+    {  32768,  20972,  32768,  20972,  20972,  13422,  20972,  13422,  32768,  20972,  32768,  20972,  20972,  13422,  20972,  13422,},
+    {  29127,  18236,  29127,  18236,  18236,  11570,  18236,  11570,  29127,  18236,  29127,  18236,  18236,  11570,  18236,  11570,},
+    {  26214,  16132,  26214,  16132,  16132,  10486,  16132,  10486,  26214,  16132,  26214,  16132,  16132,  10486,  16132,  10486,},
+    {  23831,  14980,  23831,  14980,  14980,   9321,  14980,   9321,  23831,  14980,  23831,  14980,  14980,   9321,  14980,   9321,},
+    {  20165,  13107,  20165,  13107,  13107,   8389,  13107,   8389,  20165,  13107,  20165,  13107,  13107,   8389,  13107,   8389,},
+    {  18725,  11651,  18725,  11651,  11651,   7294,  11651,   7294,  18725,  11651,  18725,  11651,  11651,   7294,  11651,   7294,},
+    {  16384,  10486,  16384,  10486,  10486,   6711,  10486,   6711,  16384,  10486,  16384,  10486,  10486,   6711,  10486,   6711,},
+    {  14564,   9118,  14564,   9118,   9118,   5785,   9118,   5785,  14564,   9118,  14564,   9118,   9118,   5785,   9118,   5785,},
+    {  13107,   8066,  13107,   8066,   8066,   5243,   8066,   5243,  13107,   8066,  13107,   8066,   8066,   5243,   8066,   5243,},
+    {  11916,   7490,  11916,   7490,   7490,   4660,   7490,   4660,  11916,   7490,  11916,   7490,   7490,   4660,   7490,   4660,},
+    {  10082,   6554,  10082,   6554,   6554,   4194,   6554,   4194,  10082,   6554,  10082,   6554,   6554,   4194,   6554,   4194,},
+    {   9362,   5825,   9362,   5825,   5825,   3647,   5825,   3647,   9362,   5825,   9362,   5825,   5825,   3647,   5825,   3647,},
+    {   8192,   5243,   8192,   5243,   5243,   3355,   5243,   3355,   8192,   5243,   8192,   5243,   5243,   3355,   5243,   3355,},
+    {   7282,   4559,   7282,   4559,   4559,   2893,   4559,   2893,   7282,   4559,   7282,   4559,   4559,   2893,   4559,   2893,},
+    {   6554,   4033,   6554,   4033,   4033,   2621,   4033,   2621,   6554,   4033,   6554,   4033,   4033,   2621,   4033,   2621,},
+    {   5958,   3745,   5958,   3745,   3745,   2330,   3745,   2330,   5958,   3745,   5958,   3745,   3745,   2330,   3745,   2330,},
+    {   5041,   3277,   5041,   3277,   3277,   2097,   3277,   2097,   5041,   3277,   5041,   3277,   3277,   2097,   3277,   2097,},
+    {   4681,   2913,   4681,   2913,   2913,   1824,   2913,   1824,   4681,   2913,   4681,   2913,   2913,   1824,   2913,   1824,},
+    {   4096,   2621,   4096,   2621,   2621,   1678,   2621,   1678,   4096,   2621,   4096,   2621,   2621,   1678,   2621,   1678,},
+    {   3641,   2280,   3641,   2280,   2280,   1446,   2280,   1446,   3641,   2280,   3641,   2280,   2280,   1446,   2280,   1446,},
+    {   3277,   2016,   3277,   2016,   2016,   1311,   2016,   1311,   3277,   2016,   3277,   2016,   2016,   1311,   2016,   1311,},
+    {   2979,   1872,   2979,   1872,   1872,   1165,   1872,   1165,   2979,   1872,   2979,   1872,   1872,   1165,   1872,   1165,},
+    {   2521,   1638,   2521,   1638,   1638,   1049,   1638,   1049,   2521,   1638,   2521,   1638,   1638,   1049,   1638,   1049,},
+    {   2341,   1456,   2341,   1456,   1456,    912,   1456,    912,   2341,   1456,   2341,   1456,   1456,    912,   1456,    912,},
+    {   2048,   1311,   2048,   1311,   1311,    839,   1311,    839,   2048,   1311,   2048,   1311,   1311,    839,   1311,    839,},
+    {   1820,   1140,   1820,   1140,   1140,    723,   1140,    723,   1820,   1140,   1820,   1140,   1140,    723,   1140,    723,},
+    {   1638,   1008,   1638,   1008,   1008,    655,   1008,    655,   1638,   1008,   1638,   1008,   1008,    655,   1008,    655,},
+    {   1489,    936,   1489,    936,    936,    583,    936,    583,   1489,    936,   1489,    936,    936,    583,    936,    583,},
+    {   1260,    819,   1260,    819,    819,    524,    819,    524,   1260,    819,   1260,    819,    819,    524,    819,    524,},
+    {   1170,    728,   1170,    728,    728,    456,    728,    456,   1170,    728,   1170,    728,    728,    456,    728,    456,},
+};
+
+//FIXME need to check that this does not overflow signed 32 bit for low qp, I am not sure, it's very close
+//FIXME check that gcc inlines this (and optimizes intra & separate_dc stuff away)
+static inline int quantize_c(DCTELEM *block, uint8_t *scantable, int qscale,
+                             int intra, int separate_dc)
+{
+    int i;
+    const int * const quant_3Btable = quant_coeff[qscale];
+    const int bias = intra ? (1 << QUANT_SHIFT) / 3 : (1 << QUANT_SHIFT) / 6;
+    const unsigned int threshold1 = (1 << QUANT_SHIFT) - bias - 1;
+    const unsigned int threshold2 = (threshold1 << 1);
+    int last_non_zero;
+
+    if (separate_dc) {
+        if (qscale <= 18) {
+            //avoid overflows
+            const int dc_bias = intra ? (1 << (QUANT_SHIFT - 2)) / 3 : (1 << (QUANT_SHIFT - 2)) / 6;
+            const unsigned int dc_threshold1 = (1 << (QUANT_SHIFT - 2)) - dc_bias - 1;
+            const unsigned int dc_threshold2 = (dc_threshold1 << 1);
+
+            int level = block[0]*quant_coeff[qscale+18][0];
+            if (((unsigned)(level + dc_threshold1)) > dc_threshold2) {
+                if (level > 0) {
+                    level = (dc_bias + level) >> (QUANT_SHIFT - 2);
+                    block[0] = level;
+                } else {
+                    level = (dc_bias - level) >> (QUANT_SHIFT - 2);
+                    block[0] = -level;
+                }
+//                last_non_zero = i;
+            } else {
+                block[0] = 0;
+            }
+        } else {
+            const int dc_bias = intra ? (1 << (QUANT_SHIFT + 1)) / 3 : (1 << (QUANT_SHIFT + 1)) / 6;
+            const unsigned int dc_threshold1 = (1 << (QUANT_SHIFT + 1)) - dc_bias - 1;
+            const unsigned int dc_threshold2 = (dc_threshold1 << 1);
+
+            int level = block[0]*quant_table[0];
+            if (((unsigned)(level + dc_threshold1)) > dc_threshold2) {
+                if (level > 0) {
+                    level = (dc_bias + level) >> (QUANT_SHIFT + 1);
+                    block[0] = level;
+                } else {
+                    level = (dc_bias - level) >> (QUANT_SHIFT + 1);
+                    block[0] = -level;
+                }
+//                last_non_zero = i;
+            } else {
+                block[0] = 0;
+            }
+        }
+        last_non_zero = 0;
+        i = 1;
+    } else {
+        last_non_zero = -1;
+        i = 0;
+    }
+
+    for (; i < 16; i++) {
+        const int j = scantable[i];
+        int level = block[j]*quant_table[j];
+
+//        if (   bias+level >= (1 << (QMAT_SHIFT - 3))
+//            || bias-level >= (1 << (QMAT_SHIFT - 3))) {
+        if (((unsigned)(level + threshold1)) > threshold2) {
+            if (level > 0) {
+                level = (bias + level) >> QUANT_SHIFT;
+                block[j] = level;
+            } else {
+                level = (bias - level) >> QUANT_SHIFT;
+                block[j] = -level;
+            }
+            last_non_zero = i;
+        } else {
+            block[j] = 0;
+        }
+    }
+
+    return last_non_zero;
+}