| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved. |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include <assert.h> |
| #include <math.h> |
| |
| #include "config/aom_config.h" |
| #include "config/aom_dsp_rtcd.h" |
| |
| #include "aom_dsp/aom_dsp_common.h" |
| #include "aom_dsp/intrapred_common.h" |
| #include "aom_mem/aom_mem.h" |
| #include "aom_ports/bitops.h" |
| |
| static inline void v_predictor(uint8_t *dst, ptrdiff_t stride, int bw, int bh, |
| const uint8_t *above, const uint8_t *left) { |
| int r; |
| (void)left; |
| |
| for (r = 0; r < bh; r++) { |
| memcpy(dst, above, bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void h_predictor(uint8_t *dst, ptrdiff_t stride, int bw, int bh, |
| const uint8_t *above, const uint8_t *left) { |
| int r; |
| (void)above; |
| |
| for (r = 0; r < bh; r++) { |
| memset(dst, left[r], bw); |
| dst += stride; |
| } |
| } |
| |
| static inline int abs_diff(int a, int b) { return (a > b) ? a - b : b - a; } |
| |
| static inline uint16_t paeth_predictor_single(uint16_t left, uint16_t top, |
| uint16_t top_left) { |
| const int base = top + left - top_left; |
| const int p_left = abs_diff(base, left); |
| const int p_top = abs_diff(base, top); |
| const int p_top_left = abs_diff(base, top_left); |
| |
| // Return nearest to base of left, top and top_left. |
| return (p_left <= p_top && p_left <= p_top_left) ? left |
| : (p_top <= p_top_left) ? top |
| : top_left; |
| } |
| |
| static inline void paeth_predictor(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left) { |
| int r, c; |
| const uint8_t ytop_left = above[-1]; |
| |
| for (r = 0; r < bh; r++) { |
| for (c = 0; c < bw; c++) |
| dst[c] = (uint8_t)paeth_predictor_single(left[r], above[c], ytop_left); |
| dst += stride; |
| } |
| } |
| |
| // Some basic checks on weights for smooth predictor. |
| #define sm_weights_sanity_checks(weights_w, weights_h, weights_scale, \ |
| pred_scale) \ |
| assert(weights_w[0] < weights_scale); \ |
| assert(weights_h[0] < weights_scale); \ |
| assert(weights_scale - weights_w[bw - 1] < weights_scale); \ |
| assert(weights_scale - weights_h[bh - 1] < weights_scale); \ |
| assert(pred_scale < 31) // ensures no overflow when calculating predictor. |
| |
| #define divide_round(value, bits) (((value) + (1 << ((bits)-1))) >> (bits)) |
| |
| static inline void smooth_predictor(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left) { |
| const uint8_t below_pred = left[bh - 1]; // estimated by bottom-left pixel |
| const uint8_t right_pred = above[bw - 1]; // estimated by top-right pixel |
| const uint8_t *const sm_weights_w = smooth_weights + bw - 4; |
| const uint8_t *const sm_weights_h = smooth_weights + bh - 4; |
| // scale = 2 * 2^SMOOTH_WEIGHT_LOG2_SCALE |
| const int log2_scale = 1 + SMOOTH_WEIGHT_LOG2_SCALE; |
| const uint16_t scale = (1 << SMOOTH_WEIGHT_LOG2_SCALE); |
| sm_weights_sanity_checks(sm_weights_w, sm_weights_h, scale, |
| log2_scale + sizeof(*dst)); |
| int r; |
| for (r = 0; r < bh; ++r) { |
| int c; |
| for (c = 0; c < bw; ++c) { |
| const uint8_t pixels[] = { above[c], below_pred, left[r], right_pred }; |
| const uint8_t weights[] = { sm_weights_h[r], scale - sm_weights_h[r], |
| sm_weights_w[c], scale - sm_weights_w[c] }; |
| uint32_t this_pred = 0; |
| int i; |
| assert(scale >= sm_weights_h[r] && scale >= sm_weights_w[c]); |
| for (i = 0; i < 4; ++i) { |
| this_pred += weights[i] * pixels[i]; |
| } |
| dst[c] = divide_round(this_pred, log2_scale); |
| } |
| dst += stride; |
| } |
| } |
| |
| static inline void smooth_v_predictor(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left) { |
| const uint8_t below_pred = left[bh - 1]; // estimated by bottom-left pixel |
| const uint8_t *const sm_weights = smooth_weights + bh - 4; |
| // scale = 2^SMOOTH_WEIGHT_LOG2_SCALE |
| const int log2_scale = SMOOTH_WEIGHT_LOG2_SCALE; |
| const uint16_t scale = (1 << SMOOTH_WEIGHT_LOG2_SCALE); |
| sm_weights_sanity_checks(sm_weights, sm_weights, scale, |
| log2_scale + sizeof(*dst)); |
| |
| int r; |
| for (r = 0; r < bh; r++) { |
| int c; |
| for (c = 0; c < bw; ++c) { |
| const uint8_t pixels[] = { above[c], below_pred }; |
| const uint8_t weights[] = { sm_weights[r], scale - sm_weights[r] }; |
| uint32_t this_pred = 0; |
| assert(scale >= sm_weights[r]); |
| int i; |
| for (i = 0; i < 2; ++i) { |
| this_pred += weights[i] * pixels[i]; |
| } |
| dst[c] = divide_round(this_pred, log2_scale); |
| } |
| dst += stride; |
| } |
| } |
| |
| static inline void smooth_h_predictor(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left) { |
| const uint8_t right_pred = above[bw - 1]; // estimated by top-right pixel |
| const uint8_t *const sm_weights = smooth_weights + bw - 4; |
| // scale = 2^SMOOTH_WEIGHT_LOG2_SCALE |
| const int log2_scale = SMOOTH_WEIGHT_LOG2_SCALE; |
| const uint16_t scale = (1 << SMOOTH_WEIGHT_LOG2_SCALE); |
| sm_weights_sanity_checks(sm_weights, sm_weights, scale, |
| log2_scale + sizeof(*dst)); |
| |
| int r; |
| for (r = 0; r < bh; r++) { |
| int c; |
| for (c = 0; c < bw; ++c) { |
| const uint8_t pixels[] = { left[r], right_pred }; |
| const uint8_t weights[] = { sm_weights[c], scale - sm_weights[c] }; |
| uint32_t this_pred = 0; |
| assert(scale >= sm_weights[c]); |
| int i; |
| for (i = 0; i < 2; ++i) { |
| this_pred += weights[i] * pixels[i]; |
| } |
| dst[c] = divide_round(this_pred, log2_scale); |
| } |
| dst += stride; |
| } |
| } |
| |
| static inline void dc_128_predictor(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left) { |
| int r; |
| (void)above; |
| (void)left; |
| |
| for (r = 0; r < bh; r++) { |
| memset(dst, 128, bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void dc_left_predictor(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left) { |
| int i, r, expected_dc, sum = 0; |
| (void)above; |
| |
| for (i = 0; i < bh; i++) sum += left[i]; |
| expected_dc = (sum + (bh >> 1)) / bh; |
| |
| for (r = 0; r < bh; r++) { |
| memset(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void dc_top_predictor(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left) { |
| int i, r, expected_dc, sum = 0; |
| (void)left; |
| |
| for (i = 0; i < bw; i++) sum += above[i]; |
| expected_dc = (sum + (bw >> 1)) / bw; |
| |
| for (r = 0; r < bh; r++) { |
| memset(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void dc_predictor(uint8_t *dst, ptrdiff_t stride, int bw, int bh, |
| const uint8_t *above, const uint8_t *left) { |
| int i, r, expected_dc, sum = 0; |
| const int count = bw + bh; |
| |
| for (i = 0; i < bw; i++) { |
| sum += above[i]; |
| } |
| for (i = 0; i < bh; i++) { |
| sum += left[i]; |
| } |
| |
| expected_dc = (sum + (count >> 1)) / count; |
| |
| for (r = 0; r < bh; r++) { |
| memset(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| static inline int divide_using_multiply_shift(int num, int shift1, |
| int multiplier, int shift2) { |
| const int interm = num >> shift1; |
| return interm * multiplier >> shift2; |
| } |
| |
| // The constants (multiplier and shifts) for a given block size are obtained |
| // as follows: |
| // - Let sum_w_h = block width + block height. |
| // - Shift 'sum_w_h' right until we reach an odd number. Let the number of |
| // shifts for that block size be called 'shift1' (see the parameter in |
| // dc_predictor_rect() function), and let the odd number be 'd'. [d has only 2 |
| // possible values: d = 3 for a 1:2 rect block and d = 5 for a 1:4 rect |
| // block]. |
| // - Find multipliers for (i) dividing by 3, and (ii) dividing by 5, |
| // using the "Algorithm 1" in: |
| // http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1467632 |
| // by ensuring that m + n = 16 (in that algorithm). This ensures that our 2nd |
| // shift will be 16, regardless of the block size. |
| |
| // Note: For low bitdepth, assembly code may be optimized by using smaller |
| // constants for smaller block sizes, where the range of the 'sum' is |
| // restricted to fewer bits. |
| |
| #define DC_MULTIPLIER_1X2 0x5556 |
| #define DC_MULTIPLIER_1X4 0x3334 |
| |
| #define DC_SHIFT2 16 |
| |
| static inline void dc_predictor_rect(uint8_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint8_t *above, |
| const uint8_t *left, int shift1, |
| int multiplier) { |
| int sum = 0; |
| |
| for (int i = 0; i < bw; i++) { |
| sum += above[i]; |
| } |
| for (int i = 0; i < bh; i++) { |
| sum += left[i]; |
| } |
| |
| const int expected_dc = divide_using_multiply_shift( |
| sum + ((bw + bh) >> 1), shift1, multiplier, DC_SHIFT2); |
| assert(expected_dc < (1 << 8)); |
| |
| for (int r = 0; r < bh; r++) { |
| memset(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| #undef DC_SHIFT2 |
| |
| void aom_dc_predictor_4x8_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 4, 8, above, left, 2, DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_dc_predictor_8x4_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 8, 4, above, left, 2, DC_MULTIPLIER_1X2); |
| } |
| |
| #if !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| void aom_dc_predictor_4x16_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 4, 16, above, left, 2, DC_MULTIPLIER_1X4); |
| } |
| |
| void aom_dc_predictor_16x4_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 16, 4, above, left, 2, DC_MULTIPLIER_1X4); |
| } |
| #endif // !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| |
| void aom_dc_predictor_8x16_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 8, 16, above, left, 3, DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_dc_predictor_16x8_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 16, 8, above, left, 3, DC_MULTIPLIER_1X2); |
| } |
| |
| #if !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| void aom_dc_predictor_8x32_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 8, 32, above, left, 3, DC_MULTIPLIER_1X4); |
| } |
| |
| void aom_dc_predictor_32x8_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 32, 8, above, left, 3, DC_MULTIPLIER_1X4); |
| } |
| #endif // !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| |
| void aom_dc_predictor_16x32_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 16, 32, above, left, 4, DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_dc_predictor_32x16_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 32, 16, above, left, 4, DC_MULTIPLIER_1X2); |
| } |
| |
| #if !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| void aom_dc_predictor_16x64_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 16, 64, above, left, 4, DC_MULTIPLIER_1X4); |
| } |
| |
| void aom_dc_predictor_64x16_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 64, 16, above, left, 4, DC_MULTIPLIER_1X4); |
| } |
| #endif // !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| |
| void aom_dc_predictor_32x64_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 32, 64, above, left, 5, DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_dc_predictor_64x32_c(uint8_t *dst, ptrdiff_t stride, |
| const uint8_t *above, const uint8_t *left) { |
| dc_predictor_rect(dst, stride, 64, 32, above, left, 5, DC_MULTIPLIER_1X2); |
| } |
| |
| #undef DC_MULTIPLIER_1X2 |
| #undef DC_MULTIPLIER_1X4 |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| |
| static inline void highbd_v_predictor(uint16_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint16_t *above, |
| const uint16_t *left, int bd) { |
| int r; |
| (void)left; |
| (void)bd; |
| for (r = 0; r < bh; r++) { |
| memcpy(dst, above, bw * sizeof(uint16_t)); |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_h_predictor(uint16_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint16_t *above, |
| const uint16_t *left, int bd) { |
| int r; |
| (void)above; |
| (void)bd; |
| for (r = 0; r < bh; r++) { |
| aom_memset16(dst, left[r], bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_paeth_predictor(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, const uint16_t *above, |
| const uint16_t *left, int bd) { |
| int r, c; |
| const uint16_t ytop_left = above[-1]; |
| (void)bd; |
| |
| for (r = 0; r < bh; r++) { |
| for (c = 0; c < bw; c++) |
| dst[c] = paeth_predictor_single(left[r], above[c], ytop_left); |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_smooth_predictor(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| (void)bd; |
| const uint16_t below_pred = left[bh - 1]; // estimated by bottom-left pixel |
| const uint16_t right_pred = above[bw - 1]; // estimated by top-right pixel |
| const uint8_t *const sm_weights_w = smooth_weights + bw - 4; |
| const uint8_t *const sm_weights_h = smooth_weights + bh - 4; |
| // scale = 2 * 2^SMOOTH_WEIGHT_LOG2_SCALE |
| const int log2_scale = 1 + SMOOTH_WEIGHT_LOG2_SCALE; |
| const uint16_t scale = (1 << SMOOTH_WEIGHT_LOG2_SCALE); |
| sm_weights_sanity_checks(sm_weights_w, sm_weights_h, scale, |
| log2_scale + sizeof(*dst)); |
| int r; |
| for (r = 0; r < bh; ++r) { |
| int c; |
| for (c = 0; c < bw; ++c) { |
| const uint16_t pixels[] = { above[c], below_pred, left[r], right_pred }; |
| const uint8_t weights[] = { sm_weights_h[r], scale - sm_weights_h[r], |
| sm_weights_w[c], scale - sm_weights_w[c] }; |
| uint32_t this_pred = 0; |
| int i; |
| assert(scale >= sm_weights_h[r] && scale >= sm_weights_w[c]); |
| for (i = 0; i < 4; ++i) { |
| this_pred += weights[i] * pixels[i]; |
| } |
| dst[c] = divide_round(this_pred, log2_scale); |
| } |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_smooth_v_predictor(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| (void)bd; |
| const uint16_t below_pred = left[bh - 1]; // estimated by bottom-left pixel |
| const uint8_t *const sm_weights = smooth_weights + bh - 4; |
| // scale = 2^SMOOTH_WEIGHT_LOG2_SCALE |
| const int log2_scale = SMOOTH_WEIGHT_LOG2_SCALE; |
| const uint16_t scale = (1 << SMOOTH_WEIGHT_LOG2_SCALE); |
| sm_weights_sanity_checks(sm_weights, sm_weights, scale, |
| log2_scale + sizeof(*dst)); |
| |
| int r; |
| for (r = 0; r < bh; r++) { |
| int c; |
| for (c = 0; c < bw; ++c) { |
| const uint16_t pixels[] = { above[c], below_pred }; |
| const uint8_t weights[] = { sm_weights[r], scale - sm_weights[r] }; |
| uint32_t this_pred = 0; |
| assert(scale >= sm_weights[r]); |
| int i; |
| for (i = 0; i < 2; ++i) { |
| this_pred += weights[i] * pixels[i]; |
| } |
| dst[c] = divide_round(this_pred, log2_scale); |
| } |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_smooth_h_predictor(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| (void)bd; |
| const uint16_t right_pred = above[bw - 1]; // estimated by top-right pixel |
| const uint8_t *const sm_weights = smooth_weights + bw - 4; |
| // scale = 2^SMOOTH_WEIGHT_LOG2_SCALE |
| const int log2_scale = SMOOTH_WEIGHT_LOG2_SCALE; |
| const uint16_t scale = (1 << SMOOTH_WEIGHT_LOG2_SCALE); |
| sm_weights_sanity_checks(sm_weights, sm_weights, scale, |
| log2_scale + sizeof(*dst)); |
| |
| int r; |
| for (r = 0; r < bh; r++) { |
| int c; |
| for (c = 0; c < bw; ++c) { |
| const uint16_t pixels[] = { left[r], right_pred }; |
| const uint8_t weights[] = { sm_weights[c], scale - sm_weights[c] }; |
| uint32_t this_pred = 0; |
| assert(scale >= sm_weights[c]); |
| int i; |
| for (i = 0; i < 2; ++i) { |
| this_pred += weights[i] * pixels[i]; |
| } |
| dst[c] = divide_round(this_pred, log2_scale); |
| } |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_dc_128_predictor(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| int r; |
| (void)above; |
| (void)left; |
| |
| for (r = 0; r < bh; r++) { |
| aom_memset16(dst, 128 << (bd - 8), bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_dc_left_predictor(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| int i, r, expected_dc, sum = 0; |
| (void)above; |
| (void)bd; |
| |
| for (i = 0; i < bh; i++) sum += left[i]; |
| expected_dc = (sum + (bh >> 1)) / bh; |
| |
| for (r = 0; r < bh; r++) { |
| aom_memset16(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_dc_top_predictor(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| int i, r, expected_dc, sum = 0; |
| (void)left; |
| (void)bd; |
| |
| for (i = 0; i < bw; i++) sum += above[i]; |
| expected_dc = (sum + (bw >> 1)) / bw; |
| |
| for (r = 0; r < bh; r++) { |
| aom_memset16(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| static inline void highbd_dc_predictor(uint16_t *dst, ptrdiff_t stride, int bw, |
| int bh, const uint16_t *above, |
| const uint16_t *left, int bd) { |
| int i, r, expected_dc, sum = 0; |
| const int count = bw + bh; |
| (void)bd; |
| |
| for (i = 0; i < bw; i++) { |
| sum += above[i]; |
| } |
| for (i = 0; i < bh; i++) { |
| sum += left[i]; |
| } |
| |
| expected_dc = (sum + (count >> 1)) / count; |
| |
| for (r = 0; r < bh; r++) { |
| aom_memset16(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| // Obtained similarly as DC_MULTIPLIER_1X2 and DC_MULTIPLIER_1X4 above, but |
| // assume 2nd shift of 17 bits instead of 16. |
| // Note: Strictly speaking, 2nd shift needs to be 17 only when: |
| // - bit depth == 12, and |
| // - bw + bh is divisible by 5 (as opposed to divisible by 3). |
| // All other cases can use half the multipliers with a shift of 16 instead. |
| // This special optimization can be used when writing assembly code. |
| #define HIGHBD_DC_MULTIPLIER_1X2 0xAAAB |
| // Note: This constant is odd, but a smaller even constant (0x199a) with the |
| // appropriate shift should work for neon in 8/10-bit. |
| #define HIGHBD_DC_MULTIPLIER_1X4 0x6667 |
| |
| #define HIGHBD_DC_SHIFT2 17 |
| |
| static inline void highbd_dc_predictor_rect(uint16_t *dst, ptrdiff_t stride, |
| int bw, int bh, |
| const uint16_t *above, |
| const uint16_t *left, int bd, |
| int shift1, uint32_t multiplier) { |
| int sum = 0; |
| (void)bd; |
| |
| for (int i = 0; i < bw; i++) { |
| sum += above[i]; |
| } |
| for (int i = 0; i < bh; i++) { |
| sum += left[i]; |
| } |
| |
| const int expected_dc = divide_using_multiply_shift( |
| sum + ((bw + bh) >> 1), shift1, multiplier, HIGHBD_DC_SHIFT2); |
| assert(expected_dc < (1 << bd)); |
| |
| for (int r = 0; r < bh; r++) { |
| aom_memset16(dst, expected_dc, bw); |
| dst += stride; |
| } |
| } |
| |
| #undef HIGHBD_DC_SHIFT2 |
| |
| void aom_highbd_dc_predictor_4x8_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 4, 8, above, left, bd, 2, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_highbd_dc_predictor_8x4_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 8, 4, above, left, bd, 2, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| #if !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| void aom_highbd_dc_predictor_4x16_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 4, 16, above, left, bd, 2, |
| HIGHBD_DC_MULTIPLIER_1X4); |
| } |
| |
| void aom_highbd_dc_predictor_16x4_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 16, 4, above, left, bd, 2, |
| HIGHBD_DC_MULTIPLIER_1X4); |
| } |
| #endif // !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| |
| void aom_highbd_dc_predictor_8x16_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 8, 16, above, left, bd, 3, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_highbd_dc_predictor_16x8_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 16, 8, above, left, bd, 3, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| #if !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| void aom_highbd_dc_predictor_8x32_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 8, 32, above, left, bd, 3, |
| HIGHBD_DC_MULTIPLIER_1X4); |
| } |
| |
| void aom_highbd_dc_predictor_32x8_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, const uint16_t *left, |
| int bd) { |
| highbd_dc_predictor_rect(dst, stride, 32, 8, above, left, bd, 3, |
| HIGHBD_DC_MULTIPLIER_1X4); |
| } |
| #endif // !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| |
| void aom_highbd_dc_predictor_16x32_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| highbd_dc_predictor_rect(dst, stride, 16, 32, above, left, bd, 4, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_highbd_dc_predictor_32x16_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| highbd_dc_predictor_rect(dst, stride, 32, 16, above, left, bd, 4, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| #if !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| void aom_highbd_dc_predictor_16x64_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| highbd_dc_predictor_rect(dst, stride, 16, 64, above, left, bd, 4, |
| HIGHBD_DC_MULTIPLIER_1X4); |
| } |
| |
| void aom_highbd_dc_predictor_64x16_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| highbd_dc_predictor_rect(dst, stride, 64, 16, above, left, bd, 4, |
| HIGHBD_DC_MULTIPLIER_1X4); |
| } |
| #endif // !CONFIG_REALTIME_ONLY || CONFIG_AV1_DECODER |
| |
| void aom_highbd_dc_predictor_32x64_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| highbd_dc_predictor_rect(dst, stride, 32, 64, above, left, bd, 5, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| void aom_highbd_dc_predictor_64x32_c(uint16_t *dst, ptrdiff_t stride, |
| const uint16_t *above, |
| const uint16_t *left, int bd) { |
| highbd_dc_predictor_rect(dst, stride, 64, 32, above, left, bd, 5, |
| HIGHBD_DC_MULTIPLIER_1X2); |
| } |
| |
| #undef HIGHBD_DC_MULTIPLIER_1X2 |
| #undef HIGHBD_DC_MULTIPLIER_1X4 |
| #endif // CONFIG_AV1_HIGHBITDEPTH |
| |
| // This serves as a wrapper function, so that all the prediction functions |
| // can be unified and accessed as a pointer array. Note that the boundary |
| // above and left are not necessarily used all the time. |
| #define intra_pred_sized(type, width, height) \ |
| void aom_##type##_predictor_##width##x##height##_c( \ |
| uint8_t *dst, ptrdiff_t stride, const uint8_t *above, \ |
| const uint8_t *left) { \ |
| type##_predictor(dst, stride, width, height, above, left); \ |
| } |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| #define intra_pred_highbd_sized(type, width, height) \ |
| void aom_highbd_##type##_predictor_##width##x##height##_c( \ |
| uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ |
| const uint16_t *left, int bd) { \ |
| highbd_##type##_predictor(dst, stride, width, height, above, left, bd); \ |
| } |
| #else // !CONFIG_AV1_HIGHBITDEPTH |
| #define intra_pred_highbd_sized(type, width, height) |
| #endif // CONFIG_AV1_HIGHBITDEPTH |
| |
| /* clang-format off */ |
| #if CONFIG_REALTIME_ONLY && !CONFIG_AV1_DECODER |
| #define intra_pred_rectangular(type) \ |
| intra_pred_sized(type, 4, 8) \ |
| intra_pred_sized(type, 8, 4) \ |
| intra_pred_sized(type, 8, 16) \ |
| intra_pred_sized(type, 16, 8) \ |
| intra_pred_sized(type, 16, 32) \ |
| intra_pred_sized(type, 32, 16) \ |
| intra_pred_sized(type, 32, 64) \ |
| intra_pred_sized(type, 64, 32) \ |
| intra_pred_highbd_sized(type, 4, 8) \ |
| intra_pred_highbd_sized(type, 8, 4) \ |
| intra_pred_highbd_sized(type, 8, 16) \ |
| intra_pred_highbd_sized(type, 16, 8) \ |
| intra_pred_highbd_sized(type, 16, 32) \ |
| intra_pred_highbd_sized(type, 32, 16) \ |
| intra_pred_highbd_sized(type, 32, 64) \ |
| intra_pred_highbd_sized(type, 64, 32) |
| #else |
| #define intra_pred_rectangular(type) \ |
| intra_pred_sized(type, 4, 8) \ |
| intra_pred_sized(type, 8, 4) \ |
| intra_pred_sized(type, 8, 16) \ |
| intra_pred_sized(type, 16, 8) \ |
| intra_pred_sized(type, 16, 32) \ |
| intra_pred_sized(type, 32, 16) \ |
| intra_pred_sized(type, 32, 64) \ |
| intra_pred_sized(type, 64, 32) \ |
| intra_pred_sized(type, 4, 16) \ |
| intra_pred_sized(type, 16, 4) \ |
| intra_pred_sized(type, 8, 32) \ |
| intra_pred_sized(type, 32, 8) \ |
| intra_pred_sized(type, 16, 64) \ |
| intra_pred_sized(type, 64, 16) \ |
| intra_pred_highbd_sized(type, 4, 8) \ |
| intra_pred_highbd_sized(type, 8, 4) \ |
| intra_pred_highbd_sized(type, 8, 16) \ |
| intra_pred_highbd_sized(type, 16, 8) \ |
| intra_pred_highbd_sized(type, 16, 32) \ |
| intra_pred_highbd_sized(type, 32, 16) \ |
| intra_pred_highbd_sized(type, 32, 64) \ |
| intra_pred_highbd_sized(type, 64, 32) \ |
| intra_pred_highbd_sized(type, 4, 16) \ |
| intra_pred_highbd_sized(type, 16, 4) \ |
| intra_pred_highbd_sized(type, 8, 32) \ |
| intra_pred_highbd_sized(type, 32, 8) \ |
| intra_pred_highbd_sized(type, 16, 64) \ |
| intra_pred_highbd_sized(type, 64, 16) |
| #endif // CONFIG_REALTIME_ONLY && !CONFIG_AV1_DECODER |
| |
| #define intra_pred_above_4x4(type) \ |
| intra_pred_sized(type, 8, 8) \ |
| intra_pred_sized(type, 16, 16) \ |
| intra_pred_sized(type, 32, 32) \ |
| intra_pred_sized(type, 64, 64) \ |
| intra_pred_highbd_sized(type, 4, 4) \ |
| intra_pred_highbd_sized(type, 8, 8) \ |
| intra_pred_highbd_sized(type, 16, 16) \ |
| intra_pred_highbd_sized(type, 32, 32) \ |
| intra_pred_highbd_sized(type, 64, 64) \ |
| intra_pred_rectangular(type) |
| #define intra_pred_allsizes(type) \ |
| intra_pred_sized(type, 4, 4) \ |
| intra_pred_above_4x4(type) |
| #define intra_pred_square(type) \ |
| intra_pred_sized(type, 4, 4) \ |
| intra_pred_sized(type, 8, 8) \ |
| intra_pred_sized(type, 16, 16) \ |
| intra_pred_sized(type, 32, 32) \ |
| intra_pred_sized(type, 64, 64) \ |
| intra_pred_highbd_sized(type, 4, 4) \ |
| intra_pred_highbd_sized(type, 8, 8) \ |
| intra_pred_highbd_sized(type, 16, 16) \ |
| intra_pred_highbd_sized(type, 32, 32) \ |
| intra_pred_highbd_sized(type, 64, 64) |
| |
| intra_pred_allsizes(v) |
| intra_pred_allsizes(h) |
| intra_pred_allsizes(smooth) |
| intra_pred_allsizes(smooth_v) |
| intra_pred_allsizes(smooth_h) |
| intra_pred_allsizes(paeth) |
| intra_pred_allsizes(dc_128) |
| intra_pred_allsizes(dc_left) |
| intra_pred_allsizes(dc_top) |
| intra_pred_square(dc) |
| /* clang-format on */ |
| #undef intra_pred_allsizes |
