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Diffstat (limited to 'third_party/aom/aom_dsp/blend_a64_mask.c')
| -rw-r--r-- | third_party/aom/aom_dsp/blend_a64_mask.c | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/blend_a64_mask.c b/third_party/aom/aom_dsp/blend_a64_mask.c new file mode 100644 index 000000000..992cc5c0c --- /dev/null +++ b/third_party/aom/aom_dsp/blend_a64_mask.c @@ -0,0 +1,345 @@ +/* + * 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 "aom/aom_integer.h" +#include "aom_ports/mem.h" +#include "aom_dsp/blend.h" +#include "aom_dsp/aom_dsp_common.h" + +#include "config/aom_dsp_rtcd.h" + +// Blending with alpha mask. Mask values come from the range [0, 64], +// as described for AOM_BLEND_A64 in aom_dsp/blend.h. src0 or src1 can +// be the same as dst, or dst can be different from both sources. + +// NOTE(david.barker): The input and output of aom_blend_a64_d32_mask_c() are +// in a higher intermediate precision, and will later be rounded down to pixel +// precision. +// Thus, in order to avoid double-rounding, we want to use normal right shifts +// within this function, not ROUND_POWER_OF_TWO. +// This works because of the identity: +// ROUND_POWER_OF_TWO(x >> y, z) == ROUND_POWER_OF_TWO(x, y+z) +// +// In contrast, the output of the non-d32 functions will not be further rounded, +// so we *should* use ROUND_POWER_OF_TWO there. + +void aom_lowbd_blend_a64_d16_mask_c( + uint8_t *dst, uint32_t dst_stride, const CONV_BUF_TYPE *src0, + uint32_t src0_stride, const CONV_BUF_TYPE *src1, uint32_t src1_stride, + const uint8_t *mask, uint32_t mask_stride, int w, int h, int subw, int subh, + ConvolveParams *conv_params) { + int i, j; + const int bd = 8; + const int offset_bits = bd + 2 * FILTER_BITS - conv_params->round_0; + const int round_offset = (1 << (offset_bits - conv_params->round_1)) + + (1 << (offset_bits - conv_params->round_1 - 1)); + const int round_bits = + 2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1; + + assert(IMPLIES((void *)src0 == dst, src0_stride == dst_stride)); + assert(IMPLIES((void *)src1 == dst, src1_stride == dst_stride)); + + assert(h >= 4); + assert(w >= 4); + assert(IS_POWER_OF_TWO(h)); + assert(IS_POWER_OF_TWO(w)); + + if (subw == 0 && subh == 0) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + int32_t res; + const int m = mask[i * mask_stride + j]; + res = ((m * (int32_t)src0[i * src0_stride + j] + + (AOM_BLEND_A64_MAX_ALPHA - m) * + (int32_t)src1[i * src1_stride + j]) >> + AOM_BLEND_A64_ROUND_BITS); + res -= round_offset; + dst[i * dst_stride + j] = + clip_pixel(ROUND_POWER_OF_TWO(res, round_bits)); + } + } + } else if (subw == 1 && subh == 1) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + int32_t res; + const int m = ROUND_POWER_OF_TWO( + mask[(2 * i) * mask_stride + (2 * j)] + + mask[(2 * i + 1) * mask_stride + (2 * j)] + + mask[(2 * i) * mask_stride + (2 * j + 1)] + + mask[(2 * i + 1) * mask_stride + (2 * j + 1)], + 2); + res = ((m * (int32_t)src0[i * src0_stride + j] + + (AOM_BLEND_A64_MAX_ALPHA - m) * + (int32_t)src1[i * src1_stride + j]) >> + AOM_BLEND_A64_ROUND_BITS); + res -= round_offset; + dst[i * dst_stride + j] = + clip_pixel(ROUND_POWER_OF_TWO(res, round_bits)); + } + } + } else if (subw == 1 && subh == 0) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + int32_t res; + const int m = AOM_BLEND_AVG(mask[i * mask_stride + (2 * j)], + mask[i * mask_stride + (2 * j + 1)]); + res = ((m * (int32_t)src0[i * src0_stride + j] + + (AOM_BLEND_A64_MAX_ALPHA - m) * + (int32_t)src1[i * src1_stride + j]) >> + AOM_BLEND_A64_ROUND_BITS); + res -= round_offset; + dst[i * dst_stride + j] = + clip_pixel(ROUND_POWER_OF_TWO(res, round_bits)); + } + } + } else { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + int32_t res; + const int m = AOM_BLEND_AVG(mask[(2 * i) * mask_stride + j], + mask[(2 * i + 1) * mask_stride + j]); + res = ((int32_t)(m * (int32_t)src0[i * src0_stride + j] + + (AOM_BLEND_A64_MAX_ALPHA - m) * + (int32_t)src1[i * src1_stride + j]) >> + AOM_BLEND_A64_ROUND_BITS); + res -= round_offset; + dst[i * dst_stride + j] = + clip_pixel(ROUND_POWER_OF_TWO(res, round_bits)); + } + } + } +} + +void aom_highbd_blend_a64_d16_mask_c( + uint8_t *dst_8, uint32_t dst_stride, const CONV_BUF_TYPE *src0, + uint32_t src0_stride, const CONV_BUF_TYPE *src1, uint32_t src1_stride, + const uint8_t *mask, uint32_t mask_stride, int w, int h, int subw, int subh, + ConvolveParams *conv_params, const int bd) { + const int offset_bits = bd + 2 * FILTER_BITS - conv_params->round_0; + const int round_offset = (1 << (offset_bits - conv_params->round_1)) + + (1 << (offset_bits - conv_params->round_1 - 1)); + const int round_bits = + 2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1; + uint16_t *dst = CONVERT_TO_SHORTPTR(dst_8); + + assert(IMPLIES(src0 == dst, src0_stride == dst_stride)); + assert(IMPLIES(src1 == dst, src1_stride == dst_stride)); + + assert(h >= 1); + assert(w >= 1); + assert(IS_POWER_OF_TWO(h)); + assert(IS_POWER_OF_TWO(w)); + + // excerpt from clip_pixel_highbd() + // set saturation_value to (1 << bd) - 1 + unsigned int saturation_value; + switch (bd) { + case 8: + default: saturation_value = 255; break; + case 10: saturation_value = 1023; break; + case 12: saturation_value = 4095; break; + } + + if (subw == 0 && subh == 0) { + for (int i = 0; i < h; ++i) { + for (int j = 0; j < w; ++j) { + int32_t res; + const int m = mask[j]; + res = ((m * src0[j] + (AOM_BLEND_A64_MAX_ALPHA - m) * src1[j]) >> + AOM_BLEND_A64_ROUND_BITS); + res -= round_offset; + unsigned int v = negative_to_zero(ROUND_POWER_OF_TWO(res, round_bits)); + dst[j] = AOMMIN(v, saturation_value); + } + mask += mask_stride; + src0 += src0_stride; + src1 += src1_stride; + dst += dst_stride; + } + } else if (subw == 1 && subh == 1) { + for (int i = 0; i < h; ++i) { + for (int j = 0; j < w; ++j) { + int32_t res; + const int m = ROUND_POWER_OF_TWO( + mask[2 * j] + mask[mask_stride + 2 * j] + mask[2 * j + 1] + + mask[mask_stride + 2 * j + 1], + 2); + res = (m * src0[j] + (AOM_BLEND_A64_MAX_ALPHA - m) * src1[j]) >> + AOM_BLEND_A64_ROUND_BITS; + res -= round_offset; + unsigned int v = negative_to_zero(ROUND_POWER_OF_TWO(res, round_bits)); + dst[j] = AOMMIN(v, saturation_value); + } + mask += 2 * mask_stride; + src0 += src0_stride; + src1 += src1_stride; + dst += dst_stride; + } + } else if (subw == 1 && subh == 0) { + for (int i = 0; i < h; ++i) { + for (int j = 0; j < w; ++j) { + int32_t res; + const int m = AOM_BLEND_AVG(mask[2 * j], mask[2 * j + 1]); + res = (m * src0[j] + (AOM_BLEND_A64_MAX_ALPHA - m) * src1[j]) >> + AOM_BLEND_A64_ROUND_BITS; + res -= round_offset; + unsigned int v = negative_to_zero(ROUND_POWER_OF_TWO(res, round_bits)); + dst[j] = AOMMIN(v, saturation_value); + } + mask += mask_stride; + src0 += src0_stride; + src1 += src1_stride; + dst += dst_stride; + } + } else { + for (int i = 0; i < h; ++i) { + for (int j = 0; j < w; ++j) { + int32_t res; + const int m = AOM_BLEND_AVG(mask[j], mask[mask_stride + j]); + res = (m * src0[j] + (AOM_BLEND_A64_MAX_ALPHA - m) * src1[j]) >> + AOM_BLEND_A64_ROUND_BITS; + res -= round_offset; + unsigned int v = negative_to_zero(ROUND_POWER_OF_TWO(res, round_bits)); + dst[j] = AOMMIN(v, saturation_value); + } + mask += 2 * mask_stride; + src0 += src0_stride; + src1 += src1_stride; + dst += dst_stride; + } + } +} + +// Blending with alpha mask. Mask values come from the range [0, 64], +// as described for AOM_BLEND_A64 in aom_dsp/blend.h. src0 or src1 can +// be the same as dst, or dst can be different from both sources. + +void aom_blend_a64_mask_c(uint8_t *dst, uint32_t dst_stride, + const uint8_t *src0, uint32_t src0_stride, + const uint8_t *src1, uint32_t src1_stride, + const uint8_t *mask, uint32_t mask_stride, int w, + int h, int subw, int subh) { + int i, j; + + assert(IMPLIES(src0 == dst, src0_stride == dst_stride)); + assert(IMPLIES(src1 == dst, src1_stride == dst_stride)); + + assert(h >= 1); + assert(w >= 1); + assert(IS_POWER_OF_TWO(h)); + assert(IS_POWER_OF_TWO(w)); + + if (subw == 0 && subh == 0) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = mask[i * mask_stride + j]; + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } else if (subw == 1 && subh == 1) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = ROUND_POWER_OF_TWO( + mask[(2 * i) * mask_stride + (2 * j)] + + mask[(2 * i + 1) * mask_stride + (2 * j)] + + mask[(2 * i) * mask_stride + (2 * j + 1)] + + mask[(2 * i + 1) * mask_stride + (2 * j + 1)], + 2); + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } else if (subw == 1 && subh == 0) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = AOM_BLEND_AVG(mask[i * mask_stride + (2 * j)], + mask[i * mask_stride + (2 * j + 1)]); + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } else { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = AOM_BLEND_AVG(mask[(2 * i) * mask_stride + j], + mask[(2 * i + 1) * mask_stride + j]); + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } +} + +void aom_highbd_blend_a64_mask_c(uint8_t *dst_8, uint32_t dst_stride, + const uint8_t *src0_8, uint32_t src0_stride, + const uint8_t *src1_8, uint32_t src1_stride, + const uint8_t *mask, uint32_t mask_stride, + int w, int h, int subw, int subh, int bd) { + int i, j; + uint16_t *dst = CONVERT_TO_SHORTPTR(dst_8); + const uint16_t *src0 = CONVERT_TO_SHORTPTR(src0_8); + const uint16_t *src1 = CONVERT_TO_SHORTPTR(src1_8); + (void)bd; + + assert(IMPLIES(src0 == dst, src0_stride == dst_stride)); + assert(IMPLIES(src1 == dst, src1_stride == dst_stride)); + + assert(h >= 1); + assert(w >= 1); + assert(IS_POWER_OF_TWO(h)); + assert(IS_POWER_OF_TWO(w)); + + assert(bd == 8 || bd == 10 || bd == 12); + + if (subw == 0 && subh == 0) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = mask[i * mask_stride + j]; + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } else if (subw == 1 && subh == 1) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = ROUND_POWER_OF_TWO( + mask[(2 * i) * mask_stride + (2 * j)] + + mask[(2 * i + 1) * mask_stride + (2 * j)] + + mask[(2 * i) * mask_stride + (2 * j + 1)] + + mask[(2 * i + 1) * mask_stride + (2 * j + 1)], + 2); + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } else if (subw == 1 && subh == 0) { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = AOM_BLEND_AVG(mask[i * mask_stride + (2 * j)], + mask[i * mask_stride + (2 * j + 1)]); + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } else { + for (i = 0; i < h; ++i) { + for (j = 0; j < w; ++j) { + const int m = AOM_BLEND_AVG(mask[(2 * i) * mask_stride + j], + mask[(2 * i + 1) * mask_stride + j]); + dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j], + src1[i * src1_stride + j]); + } + } + } +} |