get_bits: remove LAST_SKIP_CACHE macro

This macro is empty since the removal of the A32 bitstream reader.
Signed-off-by: Mans Rullgard <mans@mansr.com>

libavcodec/get_bits.h

@@ -108,11 +108,8 @@ SKIP_CACHE(name, gb, num)
 SKIP_COUNTER(name, gb, num)
     will increment the internal bit counter (see SKIP_CACHE & SKIP_BITS)
 
-LAST_SKIP_CACHE(name, gb, num)
-    will remove the next num bits from the cache if it is needed for UPDATE_CACHE otherwise it will do nothing
-
 LAST_SKIP_BITS(name, gb, num)
-    is equivalent to LAST_SKIP_CACHE; SKIP_COUNTER
+    like SKIP_BITS, to be used if next call is UPDATE_CACHE or CLOSE_READER
 
 for examples see get_bits, show_bits, skip_bits, get_vlc
 */
@@ -168,7 +165,6 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
     } while (0)
 
 #define LAST_SKIP_BITS(name, gb, num) SKIP_COUNTER(name, gb, num)
-#define LAST_SKIP_CACHE(name, gb, num)
 
 #ifdef ALT_BITSTREAM_READER_LE
 #   define SHOW_UBITS(name, gb, num) zero_extend(name##_cache, num)

libavcodec/mpeg4videodec.c

@@ -934,7 +934,7 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
                 }; SKIP_CACHE(re, &s->gb, 1);
 
                 last=  SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
-                run=   SHOW_UBITS(re, &s->gb, 6); LAST_SKIP_CACHE(re, &s->gb, 6);
+                run=   SHOW_UBITS(re, &s->gb, 6);
                 SKIP_COUNTER(re, &s->gb, 1+1+6);
                 UPDATE_CACHE(re, &s->gb);
 
@@ -951,7 +951,7 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
                 }; SKIP_CACHE(re, &s->gb, 5);
 
                 level=  level * qmul + qadd;
-                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); LAST_SKIP_CACHE(re, &s->gb, 1);
+                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
                 SKIP_COUNTER(re, &s->gb, 1+11+5+1);
 
                 i+= run + 1;
@@ -968,7 +968,7 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
                     /* third escape */
                     SKIP_CACHE(re, &s->gb, 2);
                     last=  SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
-                    run=   SHOW_UBITS(re, &s->gb, 6); LAST_SKIP_CACHE(re, &s->gb, 6);
+                    run=   SHOW_UBITS(re, &s->gb, 6);
                     SKIP_COUNTER(re, &s->gb, 2+1+6);
                     UPDATE_CACHE(re, &s->gb);
 
@@ -985,7 +985,7 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
                         if(SHOW_UBITS(re, &s->gb, 1)==0){
                             av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in 3. esc\n");
                             return -1;
-                        }; LAST_SKIP_CACHE(re, &s->gb, 1);
+                        }
 
                         SKIP_COUNTER(re, &s->gb, 1+12+1);
                     }

libavcodec/msmpeg4.c

@@ -1691,7 +1691,7 @@ int ff_msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
                     if(s->msmpeg4_version<=3){
                         last=  SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
                         run=   SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6);
-                        level= SHOW_SBITS(re, &s->gb, 8); LAST_SKIP_CACHE(re, &s->gb, 8);
+                        level= SHOW_SBITS(re, &s->gb, 8);
                         SKIP_COUNTER(re, &s->gb, 1+6+8);
                     }else{
                         int sign;