Upstream version 10.39.225.0

[platform/framework/web/crosswalk.git] / src / third_party / ffmpeg / libavcodec / get_bits.h

diff --git a/src/third_party/ffmpeg/libavcodec/get_bits.h b/src/third_party/ffmpeg/libavcodec/get_bits.h
index fd32535..b9dec4f 100644 (file)
--- a/src/third_party/ffmpeg/libavcodec/get_bits.h
+++ b/src/third_party/ffmpeg/libavcodec/get_bits.h
@@ -113,6 +113,9 @@ typedef struct RL_VLC_ELEM {
  * LAST_SKIP_BITS(name, gb, num)
  *   Like SKIP_BITS, to be used if next call is UPDATE_CACHE or CLOSE_READER.
  *
+ * BITS_LEFT(name, gb)
+ *   Return the number of bits left
+ *
  * For examples see get_bits, show_bits, skip_bits, get_vlc.
  */
 
@@ -122,19 +125,20 @@ typedef struct RL_VLC_ELEM {
 #   define MIN_CACHE_BITS 25
 #endif
 
-#if UNCHECKED_BITSTREAM_READER
-#define OPEN_READER(name, gb)                   \
+#define OPEN_READER_NOSIZE(name, gb)            \
     unsigned int name ## _index = (gb)->index;  \
     unsigned int av_unused name ## _cache
 
-#define HAVE_BITS_REMAINING(name, gb) 1
+#if UNCHECKED_BITSTREAM_READER
+#define OPEN_READER(name, gb) OPEN_READER_NOSIZE(name, gb)
+
+#define BITS_AVAILABLE(name, gb) 1
 #else
 #define OPEN_READER(name, gb)                   \
-    unsigned int name ## _index = (gb)->index;  \
-    unsigned int av_unused name ## _cache = 0;  \
-    unsigned int av_unused name ## _size_plus8 = (gb)->size_in_bits_plus8
+    OPEN_READER_NOSIZE(name, gb);               \
+    unsigned int name ## _size_plus8 = (gb)->size_in_bits_plus8
 
-#define HAVE_BITS_REMAINING(name, gb) name ## _index < name ## _size_plus8
+#define BITS_AVAILABLE(name, gb) name ## _index < name ## _size_plus8
 #endif
 
 #define CLOSE_READER(name, gb) (gb)->index = name ## _index
@@ -179,6 +183,8 @@ typedef struct RL_VLC_ELEM {
     name ## _index = FFMIN(name ## _size_plus8, name ## _index + (num))
 #endif
 
+#define BITS_LEFT(name, gb) ((int)((gb)->size_in_bits - name ## _index))
+
 #define SKIP_BITS(name, gb, num)                \
     do {                                        \
         SKIP_CACHE(name, gb, num);              \
@@ -281,7 +287,7 @@ static inline unsigned int get_bits_le(GetBitContext *s, int n)
 static inline unsigned int show_bits(GetBitContext *s, int n)
 {
     register int tmp;
-    OPEN_READER(re, s);
+    OPEN_READER_NOSIZE(re, s);
     av_assert2(n>0 && n<=25);
     UPDATE_CACHE(re, s);
     tmp = SHOW_UBITS(re, s, n);