@@ -83,6 +83,21 @@ static av_always_inline av_const unsigned av_clip_uintp2_arm(int a, int p)

     return x;

 }

+#define av_sat_add32 av_sat_add32_arm

+static av_always_inline int av_sat_add32_arm(int a, int b)

+{

+    int r;

+    __asm__ ("qadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));

+    return r;

+}

+

+#define av_sat_dadd32 av_sat_dadd32_arm

+static av_always_inline int av_sat_dadd32_arm(int a, int b)

+{

+    int r;

+    __asm__ ("qdadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));

+    return r;

+}

 #else /* HAVE_ARMV6 */

@@ -182,6 +182,30 @@ static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)

 }

 /**

+ * Add two signed 32-bit values with saturation.

+ *

+ * @param  a one value

+ * @param  b another value

+ * @return sum with signed saturation

+ */

+static av_always_inline int av_sat_add32_c(int a, int b)

+{

+    return av_clipl_int32((int64_t)a + b);

+}

+

+/**

+ * Add a doubled value to another value with saturation at both stages.

+ *

+ * @param  a first value

+ * @param  b value doubled and added to a

+ * @return sum with signed saturation

+ */

+static av_always_inline int av_sat_dadd32_c(int a, int b)

+{

+    return av_sat_add32(a, av_sat_add32(b, b));

+}

+

+/**

  * Clip a float value into the amin-amax range.

  * @param a value to clip

  * @param amin minimum value of the clip range

@@ -387,6 +411,12 @@ static av_always_inline av_const int av_popcount64_c(uint64_t x)

 #ifndef av_clip_uintp2

 #   define av_clip_uintp2   av_clip_uintp2_c

 #endif

+#ifndef av_sat_add32

+#   define av_sat_add32     av_sat_add32_c

+#endif

+#ifndef av_sat_dadd32

+#   define av_sat_dadd32    av_sat_dadd32_c

+#endif

 #ifndef av_clipf

 #   define av_clipf         av_clipf_c

 #endif