The Tor Browser: media/libvpx/vp9/common/vp9

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.

     3  *

     4  *  Use of this source code is governed by a BSD-style license

     5  *  that can be found in the LICENSE file in the root of the source

     6  *  tree. An additional intellectual property rights grant can be found

     7  *  in the file PATENTS.  All contributing project authors may

     8  *  be found in the AUTHORS file in the root of the source tree.

     9  */

    11 #ifndef VP9_COMMON_VP9_COMMON_H_

    12 #define VP9_COMMON_VP9_COMMON_H_

    14 /* Interface header for common constant data structures and lookup tables */

    16 #include <assert.h>

    18 #include "./vpx_config.h"

    19 #include "vpx_mem/vpx_mem.h"

    20 #include "vpx/vpx_integer.h"

    22 #define MIN(x, y) (((x) < (y)) ? (x) : (y))

    23 #define MAX(x, y) (((x) > (y)) ? (x) : (y))

    25 #define ROUND_POWER_OF_TWO(value, n) \

    26     (((value) + (1 << ((n) - 1))) >> (n))

    28 #define ALIGN_POWER_OF_TWO(value, n) \

    29     (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1))

    31 // Only need this for fixed-size arrays, for structs just assign.

    32 #define vp9_copy(dest, src) {            \

    33     assert(sizeof(dest) == sizeof(src)); \

    34     vpx_memcpy(dest, src, sizeof(src));  \

    35   }

    37 // Use this for variably-sized arrays.

    38 #define vp9_copy_array(dest, src, n) {       \

    39     assert(sizeof(*dest) == sizeof(*src));   \

    40     vpx_memcpy(dest, src, n * sizeof(*src)); \

    41   }

    43 #define vp9_zero(dest) vpx_memset(&dest, 0, sizeof(dest))

    44 #define vp9_zero_array(dest, n) vpx_memset(dest, 0, n * sizeof(*dest))

    46 static INLINE uint8_t clip_pixel(int val) {

    47   return (val > 255) ? 255u : (val < 0) ? 0u : val;

    48 }

    50 static INLINE int clamp(int value, int low, int high) {

    51   return value < low ? low : (value > high ? high : value);

    52 }

    54 static INLINE double fclamp(double value, double low, double high) {

    55   return value < low ? low : (value > high ? high : value);

    56 }

    58 static int get_unsigned_bits(unsigned int num_values) {

    59   int cat = 0;

    60   if (num_values <= 1)

    61     return 0;

    62   num_values--;

    63   while (num_values > 0) {

    64     cat++;

    65     num_values >>= 1;

    66   }

    67   return cat;

    68 }

    70 #if CONFIG_DEBUG

    71 #define CHECK_MEM_ERROR(cm, lval, expr) do { \

    72   lval = (expr); \

    73   if (!lval) \

    74     vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \

    75                        "Failed to allocate "#lval" at %s:%d", \

    76                        __FILE__, __LINE__); \

    77   } while (0)

    78 #else

    79 #define CHECK_MEM_ERROR(cm, lval, expr) do { \

    80   lval = (expr); \

    81   if (!lval) \

    82     vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \

    83                        "Failed to allocate "#lval); \

    84   } while (0)

    85 #endif

    87 #define VP9_SYNC_CODE_0 0x49

    88 #define VP9_SYNC_CODE_1 0x83

    89 #define VP9_SYNC_CODE_2 0x42

    91 #define VP9_FRAME_MARKER 0x2

    94 #endif  // VP9_COMMON_VP9_COMMON_H_

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