[Ffmpeg-cvslog] r6093 - in trunk/libavcodec: bitstream.c bitstream.h

[michael]

Author: michael
Date: Sat Aug 26 12:26:14 2006
New Revision: 6093

Modified:
   trunk/libavcodec/bitstream.c
   trunk/libavcodec/bitstream.h

Log:
move align_get_bits() to .h to avoid conflicts between different bitstream readers in different codecs
add a skip_bits_long() which can skip by any amount in any direction (several codecs contain half working hacks to do that)


Modified: trunk/libavcodec/bitstream.c
==============================================================================
--- trunk/libavcodec/bitstream.c	(original)
+++ trunk/libavcodec/bitstream.c	Sat Aug 26 12:26:14 2006
@@ -73,12 +73,6 @@
     }
 }
 
-void align_get_bits(GetBitContext *s)
-{
-    int n= (-get_bits_count(s)) & 7;
-    if(n) skip_bits(s, n);
-}
-
 int check_marker(GetBitContext *s, const char *msg)
 {
     int bit= get_bits1(s);

Modified: trunk/libavcodec/bitstream.h
==============================================================================
--- trunk/libavcodec/bitstream.h	(original)
+++ trunk/libavcodec/bitstream.h	Sat Aug 26 12:26:14 2006
@@ -444,6 +444,11 @@
 static inline int get_bits_count(GetBitContext *s){
     return s->index;
 }
+
+static inline void skip_bits_long(GetBitContext *s, int n){
+    s->index + n;
+}
+
 #elif defined LIBMPEG2_BITSTREAM_READER
 //libmpeg2 like reader
 
@@ -572,6 +577,22 @@
     return ((uint8_t*)s->buffer_ptr - s->buffer)*8 - 32 + s->bit_count;
 }
 
+static inline void skip_bits_long(GetBitContext *s, int n){
+    OPEN_READER(re, s)
+    re_bit_count += n;
+    re_buffer_ptr += s->bit_count>>5;
+    re_bit_count &= 31;
+    if(re_bit_count<=0){
+        re_bit_count += 32;
+        re_buffer_ptr--;
+    }
+    re_cache0=
+    re_cache1= 0;
+    UPDATE_CACHE(re, s)
+    re_cache1= 0;
+    CLOSE_READER(re, s)
+}
+
 #endif
 
 /**
@@ -720,8 +741,13 @@
 #endif
 }
 
+static void align_get_bits(GetBitContext *s)
+{
+    int n= (-get_bits_count(s)) & 7;
+    if(n) skip_bits(s, n);
+}
+
 int check_marker(GetBitContext *s, const char *msg);
-void align_get_bits(GetBitContext *s);
 int init_vlc(VLC *vlc, int nb_bits, int nb_codes,
              const void *bits, int bits_wrap, int bits_size,
              const void *codes, int codes_wrap, int codes_size,