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media/libvpx/vp9/common/vp9_idct.h@ac0c01689b40 (annotated)

media/libvpx/vp9/common/vp9_idct.h

Thu, 15 Jan 2015 15:59:08 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 15 Jan 2015 15:59:08 +0100

branch

TOR_BUG_9701

changeset 10

ac0c01689b40

permissions

-rw-r--r--

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.

michael@0	1	/*
michael@0	2	* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license
michael@0	5	* that can be found in the LICENSE file in the root of the source
michael@0	6	* tree. An additional intellectual property rights grant can be found
michael@0	7	* in the file PATENTS. All contributing project authors may
michael@0	8	* be found in the AUTHORS file in the root of the source tree.
michael@0	9	*/
michael@0	10
michael@0	11	#ifndef VP9_COMMON_VP9_IDCT_H_
michael@0	12	#define VP9_COMMON_VP9_IDCT_H_
michael@0	13
michael@0	14	#include <assert.h>
michael@0	15
michael@0	16	#include "./vpx_config.h"
michael@0	17	#include "vpx/vpx_integer.h"
michael@0	18	#include "vp9/common/vp9_common.h"
michael@0	19	#include "vp9/common/vp9_enums.h"
michael@0	20
michael@0	21
michael@0	22	// Constants and Macros used by all idct/dct functions
michael@0	23	#define DCT_CONST_BITS 14
michael@0	24	#define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1))
michael@0	25
michael@0	26	#define UNIT_QUANT_SHIFT 2
michael@0	27	#define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT)
michael@0	28
michael@0	29	#define pair_set_epi16(a, b) \
michael@0	30	_mm_set_epi16(b, a, b, a, b, a, b, a)
michael@0	31
michael@0	32	#define pair_set_epi32(a, b) \
michael@0	33	_mm_set_epi32(b, a, b, a)
michael@0	34
michael@0	35	// Constants:
michael@0	36	// for (int i = 1; i< 32; ++i)
michael@0	37	// printf("static const int cospi_%d_64 = %.0f;\n", i,
michael@0	38	// round(16384 * cos(i*M_PI/64)));
michael@0	39	// Note: sin(k*Pi/64) = cos((32-k)*Pi/64)
michael@0	40	static const int cospi_1_64 = 16364;
michael@0	41	static const int cospi_2_64 = 16305;
michael@0	42	static const int cospi_3_64 = 16207;
michael@0	43	static const int cospi_4_64 = 16069;
michael@0	44	static const int cospi_5_64 = 15893;
michael@0	45	static const int cospi_6_64 = 15679;
michael@0	46	static const int cospi_7_64 = 15426;
michael@0	47	static const int cospi_8_64 = 15137;
michael@0	48	static const int cospi_9_64 = 14811;
michael@0	49	static const int cospi_10_64 = 14449;
michael@0	50	static const int cospi_11_64 = 14053;
michael@0	51	static const int cospi_12_64 = 13623;
michael@0	52	static const int cospi_13_64 = 13160;
michael@0	53	static const int cospi_14_64 = 12665;
michael@0	54	static const int cospi_15_64 = 12140;
michael@0	55	static const int cospi_16_64 = 11585;
michael@0	56	static const int cospi_17_64 = 11003;
michael@0	57	static const int cospi_18_64 = 10394;
michael@0	58	static const int cospi_19_64 = 9760;
michael@0	59	static const int cospi_20_64 = 9102;
michael@0	60	static const int cospi_21_64 = 8423;
michael@0	61	static const int cospi_22_64 = 7723;
michael@0	62	static const int cospi_23_64 = 7005;
michael@0	63	static const int cospi_24_64 = 6270;
michael@0	64	static const int cospi_25_64 = 5520;
michael@0	65	static const int cospi_26_64 = 4756;
michael@0	66	static const int cospi_27_64 = 3981;
michael@0	67	static const int cospi_28_64 = 3196;
michael@0	68	static const int cospi_29_64 = 2404;
michael@0	69	static const int cospi_30_64 = 1606;
michael@0	70	static const int cospi_31_64 = 804;
michael@0	71
michael@0	72	// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3
michael@0	73	static const int sinpi_1_9 = 5283;
michael@0	74	static const int sinpi_2_9 = 9929;
michael@0	75	static const int sinpi_3_9 = 13377;
michael@0	76	static const int sinpi_4_9 = 15212;
michael@0	77
michael@0	78	static INLINE int dct_const_round_shift(int input) {
michael@0	79	int rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
michael@0	80	return (int16_t)rv;
michael@0	81	}
michael@0	82
michael@0	83	typedef void (*transform_1d)(const int16_t*, int16_t*);
michael@0	84
michael@0	85	typedef struct {
michael@0	86	transform_1d cols, rows; // vertical and horizontal
michael@0	87	} transform_2d;
michael@0	88
michael@0	89	void vp9_iwht4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob);
michael@0	90
michael@0	91	void vp9_idct4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob);
michael@0	92	void vp9_idct8x8_add(const int16_t *input, uint8_t *dest, int stride, int eob);
michael@0	93	void vp9_idct16x16_add(const int16_t *input, uint8_t *dest, int stride, int
michael@0	94	eob);
michael@0	95	void vp9_idct32x32_add(const int16_t *input, uint8_t *dest, int stride,
michael@0	96	int eob);
michael@0	97
michael@0	98	void vp9_iht4x4_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest,
michael@0	99	int stride, int eob);
michael@0	100	void vp9_iht8x8_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest,
michael@0	101	int stride, int eob);
michael@0	102	void vp9_iht16x16_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest,
michael@0	103	int stride, int eob);
michael@0	104
michael@0	105
michael@0	106	#endif // VP9_COMMON_VP9_IDCT_H_