shithub: libvpx

Download patch

ref: 94ed11d89dba858d92aed7f6aabe1ddee10f02e6
parent: d139655b144c7e5d97d5c6c93f33259625c890d7
author: Scott LaVarnway <slavarnway@google.com>
date: Wed May 1 12:25:10 EDT 2013 

Reduced y_dequant, uv_dequant size

Currently, only two values are used.  Removed the unused
values.

Change-Id: Idc5b8be354d84ffc68df39ea3e45f9f50d977b35


--- a/vp9/common/vp9_onyxc_int.h
+++ b/vp9/common/vp9_onyxc_int.h
@@ -174,8 +174,8 @@
 typedef struct VP9Common {
   struct vpx_internal_error_info  error;
 
-  DECLARE_ALIGNED(16, int16_t, y_dequant[QINDEX_RANGE][16]);
-  DECLARE_ALIGNED(16, int16_t, uv_dequant[QINDEX_RANGE][16]);
+  DECLARE_ALIGNED(16, int16_t, y_dequant[QINDEX_RANGE][2]);
+  DECLARE_ALIGNED(16, int16_t, uv_dequant[QINDEX_RANGE][2]);
 
   int width;
   int height;
--- a/vp9/decoder/vp9_decodframe.c
+++ b/vp9/decoder/vp9_decodframe.c
@@ -164,7 +164,7 @@
 }
 
 void vp9_init_dequantizer(VP9_COMMON *pc) {
-  int q, i;
+  int q;
 
   for (q = 0; q < QINDEX_RANGE; q++) {
     // DC value
@@ -172,12 +172,8 @@
     pc->uv_dequant[q][0] = vp9_dc_quant(q, pc->uv_dc_delta_q);
 
     // AC values
-    for (i = 1; i < 16; i++) {
-      const int rc = vp9_default_zig_zag1d_4x4[i];
-
-      pc->y_dequant[q][rc] = vp9_ac_quant(q, 0);
-      pc->uv_dequant[q][rc] = vp9_ac_quant(q, pc->uv_ac_delta_q);
-    }
+    pc->y_dequant[q][1] = vp9_ac_quant(q, 0);
+    pc->uv_dequant[q][1] = vp9_ac_quant(q, pc->uv_ac_delta_q);
   }
 }
 
--- a/vp9/encoder/vp9_quantize.c
+++ b/vp9/encoder/vp9_quantize.c
@@ -266,6 +266,7 @@
 void vp9_init_quantizer(VP9_COMP *cpi) {
   int i;
   int quant_val;
+  int quant_uv_val;
   int q;
 
   static const int zbin_boost[16] = { 0,  0,  0,  8,  8,  8, 10, 12,
@@ -293,25 +294,26 @@
     cpi->common.uv_dequant[q][0] = quant_val;
     cpi->zrun_zbin_boost_uv[q][0] = (quant_val * zbin_boost[0]) >> 7;
 
+    quant_val = vp9_ac_quant(q, 0);
+    cpi->common.y_dequant[q][1] = quant_val;
+    quant_uv_val = vp9_ac_quant(q, cpi->common.uv_ac_delta_q);
+    cpi->common.uv_dequant[q][1] = quant_uv_val;
     // all the 4x4 ac values =;
     for (i = 1; i < 16; i++) {
       int rc = vp9_default_zig_zag1d_4x4[i];
 
-      quant_val = vp9_ac_quant(q, 0);
       invert_quant(cpi->Y1quant[q] + rc, cpi->Y1quant_shift[q] + rc, quant_val);
       cpi->Y1zbin[q][rc] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
       cpi->Y1round[q][rc] = (qrounding_factor * quant_val) >> 7;
-      cpi->common.y_dequant[q][rc] = quant_val;
       cpi->zrun_zbin_boost_y1[q][i] =
           ROUND_POWER_OF_TWO(quant_val * zbin_boost[i], 7);
 
-      quant_val = vp9_ac_quant(q, cpi->common.uv_ac_delta_q);
-      invert_quant(cpi->UVquant[q] + rc, cpi->UVquant_shift[q] + rc, quant_val);
-      cpi->UVzbin[q][rc] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
-      cpi->UVround[q][rc] = (qrounding_factor * quant_val) >> 7;
-      cpi->common.uv_dequant[q][rc] = quant_val;
+      invert_quant(cpi->UVquant[q] + rc, cpi->UVquant_shift[q] + rc,
+        quant_uv_val);
+      cpi->UVzbin[q][rc] = ROUND_POWER_OF_TWO(qzbin_factor * quant_uv_val, 7);
+      cpi->UVround[q][rc] = (qrounding_factor * quant_uv_val) >> 7;
       cpi->zrun_zbin_boost_uv[q][i] =
-          ROUND_POWER_OF_TWO(quant_val * zbin_boost[i], 7);
+          ROUND_POWER_OF_TWO(quant_uv_val * zbin_boost[i], 7);
     }
   }
 }
-- 
⑨