Update public FFmpeg header files from r16647 to r18286.

third_party/ffmpeg/include/libavutil/common.h

Index: third_party/ffmpeg/include/libavutil/common.h
diff --git a/third_party/ffmpeg/include/libavutil/common.h b/third_party/ffmpeg/include/libavutil/common.h
index ed295cfce3b982a95726241f5a9592528f0755a6..15eaf9849d81d43e6e6e9a25fdd997f802754d70 100644
--- a/third_party/ffmpeg/include/libavutil/common.h
+++ b/third_party/ffmpeg/include/libavutil/common.h
@@ -19,29 +19,27 @@
  */
 
 /**
- * @file common.h
+ * @file libavutil/common.h
  * common internal and external API header
  */
 
 #ifndef AVUTIL_COMMON_H
 #define AVUTIL_COMMON_H
 
+#include <ctype.h>
+#include <errno.h>
 #include <inttypes.h>
-
-#ifdef HAVE_AV_CONFIG_H
-/* only include the following when compiling package */
-#    include "config.h"
-
-#    include <stdlib.h>
-#    include <stdio.h>
-#    include <string.h>
-#    include <ctype.h>
-#    include <limits.h>
-#    include <errno.h>
-#    include <math.h>
-#endif /* HAVE_AV_CONFIG_H */
-
-#define AV_GCC_VERSION_AT_LEAST(x,y) (defined(__GNUC__) && (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y))
+#include <limits.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef __GNUC__
+#    define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y)
+#else
+#    define AV_GCC_VERSION_AT_LEAST(x,y) 0
+#endif
 
 #ifndef av_always_inline
 #if AV_GCC_VERSION_AT_LEAST(3,1)
@@ -83,9 +81,13 @@
 #endif
 #endif
 
-#ifdef HAVE_AV_CONFIG_H
-#    include "internal.h"
-#endif /* HAVE_AV_CONFIG_H */
+#ifndef av_flatten
+#if AV_GCC_VERSION_AT_LEAST(4,1)
+#    define av_flatten __attribute__((flatten))
+#else
+#    define av_flatten
+#endif
+#endif
 
 #ifndef attribute_deprecated
 #if AV_GCC_VERSION_AT_LEAST(3,1)
@@ -103,9 +105,15 @@
 #endif
 #endif
 
-#include "mem.h"
+#ifndef av_uninit
+#if defined(__GNUC__) && !defined(__ICC)
+#    define av_uninit(x) x=x
+#else
+#    define av_uninit(x) x
+#endif
+#endif
 
-//rounded divison & shift
+//rounded division & shift
 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
 /* assume b>0 */
 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
@@ -151,49 +159,8 @@ static inline av_const int av_log2_16bit(unsigned int v)
     return n;
 }
 
-/* median of 3 */
-static inline av_const int mid_pred(int a, int b, int c)
-{
-#if HAVE_CMOV
-    int i=b;
-    __asm__ volatile(
-        "cmp    %2, %1 \n\t"
-        "cmovg  %1, %0 \n\t"
-        "cmovg  %2, %1 \n\t"
-        "cmp    %3, %1 \n\t"
-        "cmovl  %3, %1 \n\t"
-        "cmp    %1, %0 \n\t"
-        "cmovg  %1, %0 \n\t"
-        :"+&r"(i), "+&r"(a)
-        :"r"(b), "r"(c)
-    );
-    return i;
-#elif 0
-    int t= (a-b)&((a-b)>>31);
-    a-=t;
-    b+=t;
-    b-= (b-c)&((b-c)>>31);
-    b+= (a-b)&((a-b)>>31);
-
-    return b;
-#else
-    if(a>b){
-        if(c>b){
-            if(c>a) b=a;
-            else    b=c;
-        }
-    }else{
-        if(b>c){
-            if(c>a) b=c;
-            else    b=a;
-        }
-    }
-    return b;
-#endif
-}
-
 /**
- * clip a signed integer value into the amin-amax range
+ * Clips a signed integer value into the amin-amax range.
  * @param a value to clip
  * @param amin minimum value of the clip range
  * @param amax maximum value of the clip range
@@ -207,7 +174,7 @@ static inline av_const int av_clip(int a, int amin, int amax)
 }
 
 /**
- * clip a signed integer value into the 0-255 range
+ * Clips a signed integer value into the 0-255 range.
  * @param a value to clip
  * @return clipped value
  */
@@ -218,7 +185,7 @@ static inline av_const uint8_t av_clip_uint8(int a)
 }
 
 /**
- * clip a signed integer value into the -32768,32767 range
+ * Clips a signed integer value into the -32768,32767 range.
  * @param a value to clip
  * @return clipped value
  */
@@ -229,7 +196,7 @@ static inline av_const int16_t av_clip_int16(int a)
 }
 
 /**
- * clip a float value into the amin-amax range
+ * Clips a float value into the amin-amax range.
  * @param a value to clip
  * @param amin minimum value of the clip range
  * @param amax maximum value of the clip range
@@ -242,26 +209,12 @@ static inline av_const float av_clipf(float a, float amin, float amax)
     else               return a;
 }
 
-/* math */
-int64_t av_const ff_gcd(int64_t a, int64_t b);
-
-/**
- * converts fourcc string to int
- */
-static inline av_pure int ff_get_fourcc(const char *s){
-#ifdef HAVE_AV_CONFIG_H
-    assert( strlen(s)==4 );
-#endif
-
-    return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24);
-}
-
 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
 
 /*!
  * \def GET_UTF8(val, GET_BYTE, ERROR)
- * converts a UTF-8 character (up to 4 bytes long) to its 32-bit UCS-4 encoded form
+ * Converts a UTF-8 character (up to 4 bytes long) to its 32-bit UCS-4 encoded form
  * \param val is the output and should be of type uint32_t. It holds the converted
  * UCS-4 character and should be a left value.
  * \param GET_BYTE gets UTF-8 encoded bytes from any proper source. It can be
@@ -289,19 +242,19 @@ static inline av_pure int ff_get_fourcc(const char *s){
 
 /*!
  * \def PUT_UTF8(val, tmp, PUT_BYTE)
- * converts a 32-bit unicode character to its UTF-8 encoded form (up to 4 bytes long).
- * \param val is an input only argument and should be of type uint32_t. It holds
- * a ucs4 encoded unicode character that is to be converted to UTF-8. If
- * val is given as a function it's executed only once.
+ * Converts a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
+ * \param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
+ * val is given as a function it is executed only once.
  * \param tmp is a temporary variable and should be of type uint8_t. It
  * represents an intermediate value during conversion that is to be
- * outputted by PUT_BYTE.
+ * output by PUT_BYTE.
  * \param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
  * It could be a function or a statement, and uses tmp as the input byte.
  * For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
  * executed up to 4 times for values in the valid UTF-8 range and up to
  * 7 times in the general case, depending on the length of the converted
- * unicode character.
+ * Unicode character.
  */
 #define PUT_UTF8(val, tmp, PUT_BYTE)\
     {\
@@ -323,4 +276,11 @@ static inline av_pure int ff_get_fourcc(const char *s){
         }\
     }
 
+#include "mem.h"
+
+#ifdef HAVE_AV_CONFIG_H
+#    include "config.h"
+#    include "internal.h"
+#endif /* HAVE_AV_CONFIG_H */
+
 #endif /* AVUTIL_COMMON_H */