API changes, most recent first:
+2012-xx-xx - xxxxxxx - lavu 52.1.0 - intmath.h
+ Add av_ctz() for trailing zero bit count
+
2012-10-18 - xxxxxxx - lavu 51.45.0 - error.h
Add AVERROR_EXPERIMENTAL
#define av_log2 ff_log2
#define av_log2_16bit ff_log2_16bit
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup lavu_math
+ * @{
+ */
+
+#if HAVE_FAST_CLZ && AV_GCC_VERSION_AT_LEAST(3,4)
+#ifndef ff_ctz
+#define ff_ctz(v) __builtin_ctz(v)
+#endif
+#endif
+
+#ifndef ff_ctz
+#define ff_ctz ff_ctz_c
+static av_always_inline av_const int ff_ctz_c(int v)
+{
+ int c;
+
+ if (v & 0x1)
+ return 0;
+
+ c = 1;
+ if (!(v & 0xffff)) {
+ v >>= 16;
+ c += 16;
+ }
+ if (!(v & 0xff)) {
+ v >>= 8;
+ c += 8;
+ }
+ if (!(v & 0xf)) {
+ v >>= 4;
+ c += 4;
+ }
+ if (!(v & 0x3)) {
+ v >>= 2;
+ c += 2;
+ }
+ c -= v & 0x1;
+
+ return c;
+}
+#endif
+
+/**
+ * Trailing zero bit count.
+ *
+ * @param v input value. If v is 0, the result is undefined.
+ * @return the number of trailing 0-bits
+ */
+int av_ctz(int v);
+
/**
* @}
*/
*/
#define LIBAVUTIL_VERSION_MAJOR 52
-#define LIBAVUTIL_VERSION_MINOR 0
+#define LIBAVUTIL_VERSION_MINOR 1
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \