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

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     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_IDCT_H_

    12 #define VP9_COMMON_VP9_IDCT_H_

    14 #include <assert.h>

    16 #include "./vpx_config.h"

    17 #include "vpx/vpx_integer.h"

    18 #include "vp9/common/vp9_common.h"

    19 #include "vp9/common/vp9_enums.h"

    22 // Constants and Macros used by all idct/dct functions

    23 #define DCT_CONST_BITS 14

    24 #define DCT_CONST_ROUNDING  (1 << (DCT_CONST_BITS - 1))

    26 #define UNIT_QUANT_SHIFT 2

    27 #define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT)

    29 #define pair_set_epi16(a, b) \

    30   _mm_set_epi16(b, a, b, a, b, a, b, a)

    32 #define pair_set_epi32(a, b) \

    33   _mm_set_epi32(b, a, b, a)

    35 // Constants:

    36 //  for (int i = 1; i< 32; ++i)

    37 //    printf("static const int cospi_%d_64 = %.0f;\n", i,

    38 //           round(16384 * cos(i*M_PI/64)));

    39 // Note: sin(k*Pi/64) = cos((32-k)*Pi/64)

    40 static const int cospi_1_64  = 16364;

    41 static const int cospi_2_64  = 16305;

    42 static const int cospi_3_64  = 16207;

    43 static const int cospi_4_64  = 16069;

    44 static const int cospi_5_64  = 15893;

    45 static const int cospi_6_64  = 15679;

    46 static const int cospi_7_64  = 15426;

    47 static const int cospi_8_64  = 15137;

    48 static const int cospi_9_64  = 14811;

    49 static const int cospi_10_64 = 14449;

    50 static const int cospi_11_64 = 14053;

    51 static const int cospi_12_64 = 13623;

    52 static const int cospi_13_64 = 13160;

    53 static const int cospi_14_64 = 12665;

    54 static const int cospi_15_64 = 12140;

    55 static const int cospi_16_64 = 11585;

    56 static const int cospi_17_64 = 11003;

    57 static const int cospi_18_64 = 10394;

    58 static const int cospi_19_64 = 9760;

    59 static const int cospi_20_64 = 9102;

    60 static const int cospi_21_64 = 8423;

    61 static const int cospi_22_64 = 7723;

    62 static const int cospi_23_64 = 7005;

    63 static const int cospi_24_64 = 6270;

    64 static const int cospi_25_64 = 5520;

    65 static const int cospi_26_64 = 4756;

    66 static const int cospi_27_64 = 3981;

    67 static const int cospi_28_64 = 3196;

    68 static const int cospi_29_64 = 2404;

    69 static const int cospi_30_64 = 1606;

    70 static const int cospi_31_64 = 804;

    72 //  16384 * sqrt(2) * sin(kPi/9) * 2 / 3

    73 static const int sinpi_1_9 = 5283;

    74 static const int sinpi_2_9 = 9929;

    75 static const int sinpi_3_9 = 13377;

    76 static const int sinpi_4_9 = 15212;

    78 static INLINE int dct_const_round_shift(int input) {

    79   int rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);

    80   return (int16_t)rv;

    81 }

    83 typedef void (*transform_1d)(const int16_t*, int16_t*);

    85 typedef struct {

    86   transform_1d cols, rows;  // vertical and horizontal

    87 } transform_2d;

    89 void vp9_iwht4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob);

    91 void vp9_idct4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob);

    92 void vp9_idct8x8_add(const int16_t *input, uint8_t *dest, int stride, int eob);

    93 void vp9_idct16x16_add(const int16_t *input, uint8_t *dest, int stride, int

    94                        eob);

    95 void vp9_idct32x32_add(const int16_t *input, uint8_t *dest, int stride,

    96                        int eob);

    98 void vp9_iht4x4_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest,

    99                     int stride, int eob);

   100 void vp9_iht8x8_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest,

   101                     int stride, int eob);

   102 void vp9_iht16x16_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest,

   103                       int stride, int eob);

   106 #endif  // VP9_COMMON_VP9_IDCT_H_

The Tor Browser / file revision

media/libvpx/vp9/common/vp9_idct.h@ac0c01689b40

media/libvpx/vp9/common/vp9_idct.h