From 1deb66c50cea1891fb8ddcc12ec6960557b93209 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Fri, 21 Oct 2011 16:02:29 +0200
Subject: lavc: move get_b_cbp() from h263.h to mpeg4videoenc.c

It's not used anywhere else.
---
 libavcodec/mpeg4videoenc.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'libavcodec/mpeg4videoenc.c')

diff --git a/libavcodec/mpeg4videoenc.c b/libavcodec/mpeg4videoenc.c
index cbcd3ccf57..3072ace046 100644
--- a/libavcodec/mpeg4videoenc.c
+++ b/libavcodec/mpeg4videoenc.c
@@ -425,6 +425,46 @@ static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64],
     }
 }
 
+static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64],
+                            int motion_x, int motion_y, int mb_type)
+{
+    int cbp = 0, i;
+
+    if (s->flags & CODEC_FLAG_CBP_RD) {
+        int score = 0;
+        const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
+
+        for (i = 0; i < 6; i++)
+            if (s->coded_score[i] < 0) {
+                score += s->coded_score[i];
+                cbp   |= 1 << (5 - i);
+            }
+
+        if (cbp) {
+            int zero_score = -6;
+            if ((motion_x | motion_y | s->dquant | mb_type) == 0)
+                zero_score -= 4; //2*MV + mb_type + cbp bit
+
+            zero_score *= lambda;
+            if (zero_score <= score)
+                cbp = 0;
+        }
+
+        for (i = 0; i < 6; i++) {
+            if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
+                s->block_last_index[i] = -1;
+                s->dsp.clear_block(s->block[i]);
+            }
+        }
+    } else {
+        for (i = 0; i < 6; i++) {
+            if (s->block_last_index[i] >= 0)
+                cbp |= 1 << (5 - i);
+        }
+    }
+    return cbp;
+}
+
 //FIXME this is duplicated to h263.c
 static const int dquant_code[5]= {1,0,9,2,3};
 
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