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Diffstat (limited to 'media/libvpx/vp9/common/vp9_idct.h')
| -rw-r--r-- | media/libvpx/vp9/common/vp9_idct.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/media/libvpx/vp9/common/vp9_idct.h b/media/libvpx/vp9/common/vp9_idct.h new file mode 100644 index 000000000..cee1682a6 --- /dev/null +++ b/media/libvpx/vp9/common/vp9_idct.h @@ -0,0 +1,212 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#ifndef VP9_COMMON_VP9_IDCT_H_ +#define VP9_COMMON_VP9_IDCT_H_ + +#include <assert.h> + +#include "./vpx_config.h" +#include "vpx_ports/mem.h" +#include "vp9/common/vp9_common.h" +#include "vp9/common/vp9_enums.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// Constants and Macros used by all idct/dct functions +#define DCT_CONST_BITS 14 +#define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1)) + +#define UNIT_QUANT_SHIFT 2 +#define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT) + +#define pair_set_epi16(a, b) \ + _mm_set_epi16((int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a), \ + (int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a)) + +#define dual_set_epi16(a, b) \ + _mm_set_epi16((int16_t)(b), (int16_t)(b), (int16_t)(b), (int16_t)(b), \ + (int16_t)(a), (int16_t)(a), (int16_t)(a), (int16_t)(a)) + +// Constants: +// for (int i = 1; i< 32; ++i) +// printf("static const int cospi_%d_64 = %.0f;\n", i, +// round(16384 * cos(i*M_PI/64))); +// Note: sin(k*Pi/64) = cos((32-k)*Pi/64) +static const tran_high_t cospi_1_64 = 16364; +static const tran_high_t cospi_2_64 = 16305; +static const tran_high_t cospi_3_64 = 16207; +static const tran_high_t cospi_4_64 = 16069; +static const tran_high_t cospi_5_64 = 15893; +static const tran_high_t cospi_6_64 = 15679; +static const tran_high_t cospi_7_64 = 15426; +static const tran_high_t cospi_8_64 = 15137; +static const tran_high_t cospi_9_64 = 14811; +static const tran_high_t cospi_10_64 = 14449; +static const tran_high_t cospi_11_64 = 14053; +static const tran_high_t cospi_12_64 = 13623; +static const tran_high_t cospi_13_64 = 13160; +static const tran_high_t cospi_14_64 = 12665; +static const tran_high_t cospi_15_64 = 12140; +static const tran_high_t cospi_16_64 = 11585; +static const tran_high_t cospi_17_64 = 11003; +static const tran_high_t cospi_18_64 = 10394; +static const tran_high_t cospi_19_64 = 9760; +static const tran_high_t cospi_20_64 = 9102; +static const tran_high_t cospi_21_64 = 8423; +static const tran_high_t cospi_22_64 = 7723; +static const tran_high_t cospi_23_64 = 7005; +static const tran_high_t cospi_24_64 = 6270; +static const tran_high_t cospi_25_64 = 5520; +static const tran_high_t cospi_26_64 = 4756; +static const tran_high_t cospi_27_64 = 3981; +static const tran_high_t cospi_28_64 = 3196; +static const tran_high_t cospi_29_64 = 2404; +static const tran_high_t cospi_30_64 = 1606; +static const tran_high_t cospi_31_64 = 804; + +// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 +static const tran_high_t sinpi_1_9 = 5283; +static const tran_high_t sinpi_2_9 = 9929; +static const tran_high_t sinpi_3_9 = 13377; +static const tran_high_t sinpi_4_9 = 15212; + +static INLINE tran_low_t check_range(tran_high_t input) { +#if CONFIG_COEFFICIENT_RANGE_CHECKING + // For valid VP9 input streams, intermediate stage coefficients should always + // stay within the range of a signed 16 bit integer. Coefficients can go out + // of this range for invalid/corrupt VP9 streams. However, strictly checking + // this range for every intermediate coefficient can burdensome for a decoder, + // therefore the following assertion is only enabled when configured with + // --enable-coefficient-range-checking. + assert(INT16_MIN <= input); + assert(input <= INT16_MAX); +#endif // CONFIG_COEFFICIENT_RANGE_CHECKING + return (tran_low_t)input; +} + +static INLINE tran_low_t dct_const_round_shift(tran_high_t input) { + tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); + return check_range(rv); +} + +#if CONFIG_VP9_HIGHBITDEPTH +static INLINE tran_low_t highbd_check_range(tran_high_t input, + int bd) { +#if CONFIG_COEFFICIENT_RANGE_CHECKING + // For valid highbitdepth VP9 streams, intermediate stage coefficients will + // stay within the ranges: + // - 8 bit: signed 16 bit integer + // - 10 bit: signed 18 bit integer + // - 12 bit: signed 20 bit integer + const int32_t int_max = (1 << (7 + bd)) - 1; + const int32_t int_min = -int_max - 1; + assert(int_min <= input); + assert(input <= int_max); + (void) int_min; +#endif // CONFIG_COEFFICIENT_RANGE_CHECKING + (void) bd; + return (tran_low_t)input; +} + +static INLINE tran_low_t highbd_dct_const_round_shift(tran_high_t input, + int bd) { + tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); + return highbd_check_range(rv, bd); +} +#endif // CONFIG_VP9_HIGHBITDEPTH + +typedef void (*transform_1d)(const tran_low_t*, tran_low_t*); + +typedef struct { + transform_1d cols, rows; // vertical and horizontal +} transform_2d; + +#if CONFIG_VP9_HIGHBITDEPTH +typedef void (*highbd_transform_1d)(const tran_low_t*, tran_low_t*, int bd); + +typedef struct { + highbd_transform_1d cols, rows; // vertical and horizontal +} highbd_transform_2d; +#endif // CONFIG_VP9_HIGHBITDEPTH + +#if CONFIG_EMULATE_HARDWARE +// When CONFIG_EMULATE_HARDWARE is 1 the transform performs a +// non-normative method to handle overflows. A stream that causes +// overflows in the inverse transform is considered invalid in VP9, +// and a hardware implementer is free to choose any reasonable +// method to handle overflows. However to aid in hardware +// verification they can use a specific implementation of the +// WRAPLOW() macro below that is identical to their intended +// hardware implementation (and also use configure options to trigger +// the C-implementation of the transform). +// +// The particular WRAPLOW implementation below performs strict +// overflow wrapping to match common hardware implementations. +// bd of 8 uses trans_low with 16bits, need to remove 16bits +// bd of 10 uses trans_low with 18bits, need to remove 14bits +// bd of 12 uses trans_low with 20bits, need to remove 12bits +// bd of x uses trans_low with 8+x bits, need to remove 24-x bits +#define WRAPLOW(x, bd) ((((int32_t)(x)) << (24 - bd)) >> (24 - bd)) +#else +#define WRAPLOW(x, bd) (x) +#endif // CONFIG_EMULATE_HARDWARE + +void vp9_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride, + int eob); +void vp9_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride, + int eob); +void vp9_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride, + int eob); +void vp9_idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride, int + eob); +void vp9_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride, + int eob); + +void vp9_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, + int stride, int eob); +void vp9_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, + int stride, int eob); +void vp9_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, + int stride, int eob); + +#if CONFIG_VP9_HIGHBITDEPTH +void vp9_highbd_idct4(const tran_low_t *input, tran_low_t *output, int bd); +void vp9_highbd_idct8(const tran_low_t *input, tran_low_t *output, int bd); +void vp9_highbd_idct16(const tran_low_t *input, tran_low_t *output, int bd); +void vp9_highbd_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride, + int eob, int bd); +void vp9_highbd_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride, + int eob, int bd); +void vp9_highbd_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride, + int eob, int bd); +void vp9_highbd_idct16x16_add(const tran_low_t *input, uint8_t *dest, + int stride, int eob, int bd); +void vp9_highbd_idct32x32_add(const tran_low_t *input, uint8_t *dest, + int stride, int eob, int bd); +void vp9_highbd_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, + uint8_t *dest, int stride, int eob, int bd); +void vp9_highbd_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, + uint8_t *dest, int stride, int eob, int bd); +void vp9_highbd_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, + uint8_t *dest, int stride, int eob, int bd); +static INLINE uint16_t highbd_clip_pixel_add(uint16_t dest, tran_high_t trans, + int bd) { + trans = WRAPLOW(trans, bd); + return clip_pixel_highbd(WRAPLOW(dest + trans, bd), bd); +} +#endif // CONFIG_VP9_HIGHBITDEPTH +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // VP9_COMMON_VP9_IDCT_H_ |