From 4e7e79f770536bb350e5c66e26590d861bca4a38 Mon Sep 17 00:00:00 2001
From: Scott LaVarnway <slavarnway@google.com>
Date: Tue, 1 Feb 2011 10:05:35 -0500
Subject: [PATCH] Removed intra_modes from vp8cx_encode_intra_macro_block

Restructured function in order to eliminate the prediction
modes save/restore.  Code cleanup also.

Change-Id: I816e3b910de64d0f0f0ddc2398805c63263191e8
---
 vp8/encoder/encodeframe.c | 66 +++++++++++----------------------------
 1 file changed, 19 insertions(+), 47 deletions(-)

diff --git a/vp8/encoder/encodeframe.c b/vp8/encoder/encodeframe.c
index ee9578b61..4c23a5f09 100644
--- a/vp8/encoder/encodeframe.c
+++ b/vp8/encoder/encodeframe.c
@@ -1147,64 +1147,37 @@ static void sum_intra_stats(VP8_COMP *cpi, MACROBLOCK *x)
 int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t)
 {
     int Error4x4, Error16x16, error_uv;
-    B_PREDICTION_MODE intra_bmodes[16];
     int rate4x4, rate16x16, rateuv;
     int dist4x4, dist16x16, distuv;
     int rate = 0;
     int rate4x4_tokenonly = 0;
     int rate16x16_tokenonly = 0;
     int rateuv_tokenonly = 0;
-    int i;
 
     x->e_mbd.mode_info_context->mbmi.ref_frame = INTRA_FRAME;
 
 #if !(CONFIG_REALTIME_ONLY)
-
     if (cpi->sf.RD && cpi->compressor_speed != 2)
     {
-        Error4x4 = vp8_rd_pick_intra4x4mby_modes(cpi, x, &rate4x4, &rate4x4_tokenonly, &dist4x4);
-
-        //save the b modes for possible later use
-        for (i = 0; i < 16; i++)
-            intra_bmodes[i] = x->e_mbd.block[i].bmi.mode;
-
-        Error16x16 = vp8_rd_pick_intra16x16mby_mode(cpi, x, &rate16x16, &rate16x16_tokenonly, &dist16x16);
-
         error_uv = vp8_rd_pick_intra_mbuv_mode(cpi, x, &rateuv, &rateuv_tokenonly, &distuv);
-
-        vp8_encode_intra16x16mbuv(IF_RTCD(&cpi->rtcd), x);
         rate += rateuv;
 
-        if (Error4x4 < Error16x16)
-        {
-            rate += rate4x4;
-            x->e_mbd.mode_info_context->mbmi.mode = B_PRED;
-
-            // get back the intra block modes
-            for (i = 0; i < 16; i++)
-                x->e_mbd.block[i].bmi.mode = intra_bmodes[i];
-
-            vp8_encode_intra4x4mby(IF_RTCD(&cpi->rtcd), x);
-        }
-        else
-        {
-            vp8_encode_intra16x16mby(IF_RTCD(&cpi->rtcd), x);
-            rate += rate16x16;
-        }
+        Error16x16 = vp8_rd_pick_intra16x16mby_mode(cpi, x, &rate16x16, &rate16x16_tokenonly, &dist16x16);
 
-        sum_intra_stats(cpi, x);
+        Error4x4 = vp8_rd_pick_intra4x4mby_modes(cpi, x, &rate4x4, &rate4x4_tokenonly, &dist4x4);
 
-        vp8_tokenize_mb(cpi, &x->e_mbd, t);
+        rate += (Error4x4 < Error16x16) ? rate4x4 : rate16x16;
     }
     else
 #endif
     {
-
         int rate2, best_distortion;
         MB_PREDICTION_MODE mode, best_mode = DC_PRED;
         int this_rd;
         Error16x16 = INT_MAX;
 
+        vp8_pick_intra_mbuv_mode(x);
+
         for (mode = DC_PRED; mode <= TM_PRED; mode ++)
         {
             int distortion2;
@@ -1222,6 +1195,7 @@ int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t)
                 best_distortion = distortion2;
             }
         }
+        x->e_mbd.mode_info_context->mbmi.mode = best_mode;
 
         vp8_pick_intra4x4mby_modes(IF_RTCD(&cpi->rtcd), x, &rate2, &best_distortion);
 
@@ -1229,23 +1203,21 @@ int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t)
             Error4x4 = INT_MAX;
         else
             Error4x4 = RD_ESTIMATE(x->rdmult, x->rddiv, rate2, best_distortion);
+    }
 
-        if (Error4x4 < Error16x16)
-        {
-            x->e_mbd.mode_info_context->mbmi.mode = B_PRED;
-            vp8_encode_intra4x4mby(IF_RTCD(&cpi->rtcd), x);
-        }
-        else
-        {
-            x->e_mbd.mode_info_context->mbmi.mode = best_mode;
-            vp8_encode_intra16x16mby(IF_RTCD(&cpi->rtcd), x);
-        }
-
-        vp8_pick_intra_mbuv_mode(x);
-        vp8_encode_intra16x16mbuv(IF_RTCD(&cpi->rtcd), x);
-        sum_intra_stats(cpi, x);
-        vp8_tokenize_mb(cpi, &x->e_mbd, t);
+    if (Error4x4 < Error16x16)
+    {
+        x->e_mbd.mode_info_context->mbmi.mode = B_PRED;
+        vp8_encode_intra4x4mby(IF_RTCD(&cpi->rtcd), x);
     }
+    else
+    {
+        vp8_encode_intra16x16mby(IF_RTCD(&cpi->rtcd), x);
+    }
+
+    vp8_encode_intra16x16mbuv(IF_RTCD(&cpi->rtcd), x);
+    sum_intra_stats(cpi, x);
+    vp8_tokenize_mb(cpi, &x->e_mbd, t);
 
     return rate;
 }
-- 
2.40.0