michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: #ifndef VP9_COMMON_VP9_COMMON_H_
michael@0: #define VP9_COMMON_VP9_COMMON_H_
michael@0: 
michael@0: /* Interface header for common constant data structures and lookup tables */
michael@0: 
michael@0: #include <assert.h>
michael@0: 
michael@0: #include "./vpx_config.h"
michael@0: #include "vpx_mem/vpx_mem.h"
michael@0: #include "vpx/vpx_integer.h"
michael@0: 
michael@0: #define MIN(x, y) (((x) < (y)) ? (x) : (y))
michael@0: #define MAX(x, y) (((x) > (y)) ? (x) : (y))
michael@0: 
michael@0: #define ROUND_POWER_OF_TWO(value, n) \
michael@0:     (((value) + (1 << ((n) - 1))) >> (n))
michael@0: 
michael@0: #define ALIGN_POWER_OF_TWO(value, n) \
michael@0:     (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1))
michael@0: 
michael@0: // Only need this for fixed-size arrays, for structs just assign.
michael@0: #define vp9_copy(dest, src) {            \
michael@0:     assert(sizeof(dest) == sizeof(src)); \
michael@0:     vpx_memcpy(dest, src, sizeof(src));  \
michael@0:   }
michael@0: 
michael@0: // Use this for variably-sized arrays.
michael@0: #define vp9_copy_array(dest, src, n) {       \
michael@0:     assert(sizeof(*dest) == sizeof(*src));   \
michael@0:     vpx_memcpy(dest, src, n * sizeof(*src)); \
michael@0:   }
michael@0: 
michael@0: #define vp9_zero(dest) vpx_memset(&dest, 0, sizeof(dest))
michael@0: #define vp9_zero_array(dest, n) vpx_memset(dest, 0, n * sizeof(*dest))
michael@0: 
michael@0: static INLINE uint8_t clip_pixel(int val) {
michael@0:   return (val > 255) ? 255u : (val < 0) ? 0u : val;
michael@0: }
michael@0: 
michael@0: static INLINE int clamp(int value, int low, int high) {
michael@0:   return value < low ? low : (value > high ? high : value);
michael@0: }
michael@0: 
michael@0: static INLINE double fclamp(double value, double low, double high) {
michael@0:   return value < low ? low : (value > high ? high : value);
michael@0: }
michael@0: 
michael@0: static int get_unsigned_bits(unsigned int num_values) {
michael@0:   int cat = 0;
michael@0:   if (num_values <= 1)
michael@0:     return 0;
michael@0:   num_values--;
michael@0:   while (num_values > 0) {
michael@0:     cat++;
michael@0:     num_values >>= 1;
michael@0:   }
michael@0:   return cat;
michael@0: }
michael@0: 
michael@0: #if CONFIG_DEBUG
michael@0: #define CHECK_MEM_ERROR(cm, lval, expr) do { \
michael@0:   lval = (expr); \
michael@0:   if (!lval) \
michael@0:     vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \
michael@0:                        "Failed to allocate "#lval" at %s:%d", \
michael@0:                        __FILE__, __LINE__); \
michael@0:   } while (0)
michael@0: #else
michael@0: #define CHECK_MEM_ERROR(cm, lval, expr) do { \
michael@0:   lval = (expr); \
michael@0:   if (!lval) \
michael@0:     vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \
michael@0:                        "Failed to allocate "#lval); \
michael@0:   } while (0)
michael@0: #endif
michael@0: 
michael@0: #define VP9_SYNC_CODE_0 0x49
michael@0: #define VP9_SYNC_CODE_1 0x83
michael@0: #define VP9_SYNC_CODE_2 0x42
michael@0: 
michael@0: #define VP9_FRAME_MARKER 0x2
michael@0: 
michael@0: 
michael@0: #endif  // VP9_COMMON_VP9_COMMON_H_