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Diffstat (limited to 'include/common/intops.h')
-rw-r--r-- | include/common/intops.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/common/intops.h b/include/common/intops.h new file mode 100644 index 0000000..a739709 --- /dev/null +++ b/include/common/intops.h @@ -0,0 +1,78 @@ +/* + * Copyright © 2018, VideoLAN and dav1d authors + * Copyright © 2018, Two Orioles, LLC + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __DAV1D_COMMON_INTOPS_H__ +#define __DAV1D_COMMON_INTOPS_H__ + +#include <stdint.h> + +static inline int imax(const int a, const int b) { + return a > b ? a : b; +} + +static inline int imin(const int a, const int b) { + return a < b ? a : b; +} + +static inline int iclip(const int v, const int min, const int max) { + return v < min ? min : v > max ? max : v; +} + +static inline int iclip_u8(const int v) { + return iclip(v, 0, 255); +} + +static inline int apply_sign(const int v, const int s) { + return s < 0 ? -v : v; +} + +static inline int ulog2(const unsigned v) { + return 31 - __builtin_clz(v); +} + +static inline int u64log2(const uint64_t v) { + return 63 - __builtin_clzll(v); +} + +static inline unsigned rl16(const uint8_t *const ptr) { + return (ptr[1] << 8) | ptr[0]; +} + +static inline unsigned rl32(const uint8_t *const ptr) { + return (rl16(&ptr[2]) << 16) | rl16(ptr); +} + +static inline unsigned inv_recenter(const unsigned r, const unsigned v) { + if (v > (r << 1)) + return v; + else if ((v & 1) == 0) + return (v >> 1) + r; + else + return r - ((v + 1) >> 1); +} + +#endif /* __DAV1D_COMMON_INTOPS_H__ */ |