Fixes:

[ffmpeg] / libavcodec / cabac.h

diff --git a/libavcodec/cabac.h b/libavcodec/cabac.h
index 18fd51d56a079b0a8db697fbb4540886c0b14b27..3008792b2108ddbdac32ae23686700c7a75bd1b8 100644 (file)
--- a/libavcodec/cabac.h
+++ b/libavcodec/cabac.h
@@ -39,9 +39,9 @@ typedef struct CABACContext{
 #ifdef STRICT_LIMITS
     int symCount;
 #endif
-    uint8_t lps_range[2*65][4];   ///< rangeTabLPS
-    uint8_t lps_state[2*64];      ///< transIdxLPS
-    uint8_t mps_state[2*64];      ///< transIdxMPS
+    uint8_t lps_range[2*66][4];   ///< rangeTabLPS
+    uint8_t lps_state[2*65];      ///< transIdxLPS
+    uint8_t mps_state[2*65];      ///< transIdxMPS
     const uint8_t *bytestream_start;
     const uint8_t *bytestream;
     const uint8_t *bytestream_end;
@@ -266,16 +266,16 @@ static void refill(CABACContext *c){
     c->bytestream+= CABAC_BITS/8;
 }
 
-#if 0 /* all use commented */
+#if 1 /* all use commented */
 static void refill2(CABACContext *c){
     int i, x;
 
     x= c->low ^ (c->low-1);
-    i= 8 - ff_h264_norm_shift[x>>(CABAC_BITS+1)];
+    i= 9 - ff_h264_norm_shift[x>>(CABAC_BITS+1)];
 
     x= -CABAC_MASK;
 
-    if(c->bytestream < c->bytestream_end)
+    if(c->bytestream <= c->bytestream_end)
 #if CABAC_BITS == 16
         x+= (c->bytestream[0]<<9) + (c->bytestream[1]<<1);
 #else
@@ -376,20 +376,37 @@ static int get_cabac(CABACContext *c, uint8_t * const state){
 #if 1
     if(c->low < c->range){
         bit= s&1;
-        *state= c->mps_state[s];
+#ifdef ARCH_X86
+    //P3:627
+asm(
+        "addb $2, %b0       \n\t"
+        " js 1f             \n\t"
+        "movb %b0, %1       \n\t"
+        "1:                 \n\t"
+        : "+q"(s), "=m"(*state)
+);
+#else
+        *state= c->mps_state[s]; //P3:655
+/*        if(s<126) //P3:657
+            *state= s+2;*/
+        s+=2; //P3:631
+        if(s<128)
+            *state= s;
+#endif
         renorm_cabac_decoder_once(c);
     }else{
-//        int shift= ff_h264_norm_shift[RangeLPS>>17];
-        bit= (s&1)^1;
+        bit= ff_h264_norm_shift[RangeLPS>>17];
         c->low -= c->range;
         *state= c->lps_state[s];
-        c->range = RangeLPS;
-        renorm_cabac_decoder(c);
-/*        c->range = RangeLPS<<shift;
-        c->low <<= shift;
+//        c->range = RangeLPS;
+//        renorm_cabac_decoder(c);
+        c->range = RangeLPS<<bit;
+        c->low <<= bit;
+        bit= (s&1)^1;
+
         if(!(c->low & 0xFFFF)){
             refill2(c);
-        }*/
+        }
     }
 #else
     lps_mask= (c->range - c->low)>>31;