* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef FFMPEG_MATHEMATICS_H
-#define FFMPEG_MATHEMATICS_H
+#ifndef AVUTIL_MATHEMATICS_H
+#define AVUTIL_MATHEMATICS_H
#include <stdint.h>
+#include <math.h>
#include "rational.h"
+#ifndef M_E
+#define M_E 2.7182818284590452354 /* e */
+#endif
+#ifndef M_LN2
+#define M_LN2 0.69314718055994530942 /* log_e 2 */
+#endif
+#ifndef M_LN10
+#define M_LN10 2.30258509299404568402 /* log_e 10 */
+#endif
+#ifndef M_PI
+#define M_PI 3.14159265358979323846 /* pi */
+#endif
+#ifndef M_SQRT1_2
+#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
+#endif
+
enum AVRounding {
AV_ROUND_ZERO = 0, ///< round toward zero
AV_ROUND_INF = 1, ///< round away from zero
* rescale a 64bit integer with rounding to nearest.
* a simple a*b/c isn't possible as it can overflow
*/
-int64_t av_rescale(int64_t a, int64_t b, int64_t c);
+int64_t av_rescale(int64_t a, int64_t b, int64_t c) av_const;
/**
* rescale a 64bit integer with specified rounding.
* a simple a*b/c isn't possible as it can overflow
*/
-int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
+int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding) av_const;
/**
* rescale a 64bit integer by 2 rational numbers.
*/
-int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq);
+int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const;
-#endif /* FFMPEG_MATHEMATICS_H */
+#endif /* AVUTIL_MATHEMATICS_H */