diff options
Diffstat (limited to 'media/libvpx/libvpx/vpx_dsp/arm/deblock_neon.c')
-rw-r--r-- | media/libvpx/libvpx/vpx_dsp/arm/deblock_neon.c | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/arm/deblock_neon.c b/media/libvpx/libvpx/vpx_dsp/arm/deblock_neon.c new file mode 100644 index 0000000000..7efce32735 --- /dev/null +++ b/media/libvpx/libvpx/vpx_dsp/arm/deblock_neon.c @@ -0,0 +1,480 @@ +/* + * Copyright (c) 2016 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. + */ + +#include <arm_neon.h> +#include <assert.h> + +#include "./vpx_dsp_rtcd.h" +#include "vpx/vpx_integer.h" +#include "vpx_dsp/arm/transpose_neon.h" + +extern const int16_t vpx_rv[]; + +static uint8x8_t average_k_out(const uint8x8_t a2, const uint8x8_t a1, + const uint8x8_t v0, const uint8x8_t b1, + const uint8x8_t b2) { + const uint8x8_t k1 = vrhadd_u8(a2, a1); + const uint8x8_t k2 = vrhadd_u8(b2, b1); + const uint8x8_t k3 = vrhadd_u8(k1, k2); + return vrhadd_u8(k3, v0); +} + +static uint8x8_t generate_mask(const uint8x8_t a2, const uint8x8_t a1, + const uint8x8_t v0, const uint8x8_t b1, + const uint8x8_t b2, const uint8x8_t filter) { + const uint8x8_t a2_v0 = vabd_u8(a2, v0); + const uint8x8_t a1_v0 = vabd_u8(a1, v0); + const uint8x8_t b1_v0 = vabd_u8(b1, v0); + const uint8x8_t b2_v0 = vabd_u8(b2, v0); + + uint8x8_t max = vmax_u8(a2_v0, a1_v0); + max = vmax_u8(b1_v0, max); + max = vmax_u8(b2_v0, max); + return vclt_u8(max, filter); +} + +static uint8x8_t generate_output(const uint8x8_t a2, const uint8x8_t a1, + const uint8x8_t v0, const uint8x8_t b1, + const uint8x8_t b2, const uint8x8_t filter) { + const uint8x8_t k_out = average_k_out(a2, a1, v0, b1, b2); + const uint8x8_t mask = generate_mask(a2, a1, v0, b1, b2, filter); + + return vbsl_u8(mask, k_out, v0); +} + +// Same functions but for uint8x16_t. +static uint8x16_t average_k_outq(const uint8x16_t a2, const uint8x16_t a1, + const uint8x16_t v0, const uint8x16_t b1, + const uint8x16_t b2) { + const uint8x16_t k1 = vrhaddq_u8(a2, a1); + const uint8x16_t k2 = vrhaddq_u8(b2, b1); + const uint8x16_t k3 = vrhaddq_u8(k1, k2); + return vrhaddq_u8(k3, v0); +} + +static uint8x16_t generate_maskq(const uint8x16_t a2, const uint8x16_t a1, + const uint8x16_t v0, const uint8x16_t b1, + const uint8x16_t b2, const uint8x16_t filter) { + const uint8x16_t a2_v0 = vabdq_u8(a2, v0); + const uint8x16_t a1_v0 = vabdq_u8(a1, v0); + const uint8x16_t b1_v0 = vabdq_u8(b1, v0); + const uint8x16_t b2_v0 = vabdq_u8(b2, v0); + + uint8x16_t max = vmaxq_u8(a2_v0, a1_v0); + max = vmaxq_u8(b1_v0, max); + max = vmaxq_u8(b2_v0, max); + return vcltq_u8(max, filter); +} + +static uint8x16_t generate_outputq(const uint8x16_t a2, const uint8x16_t a1, + const uint8x16_t v0, const uint8x16_t b1, + const uint8x16_t b2, + const uint8x16_t filter) { + const uint8x16_t k_out = average_k_outq(a2, a1, v0, b1, b2); + const uint8x16_t mask = generate_maskq(a2, a1, v0, b1, b2, filter); + + return vbslq_u8(mask, k_out, v0); +} + +void vpx_post_proc_down_and_across_mb_row_neon(uint8_t *src_ptr, + uint8_t *dst_ptr, int src_stride, + int dst_stride, int cols, + uint8_t *f, int size) { + uint8_t *src, *dst; + int row; + int col; + + // While columns of length 16 can be processed, load them. + for (col = 0; col < cols - 8; col += 16) { + uint8x16_t a0, a1, a2, a3, a4, a5, a6, a7; + src = src_ptr - 2 * src_stride; + dst = dst_ptr; + + a0 = vld1q_u8(src); + src += src_stride; + a1 = vld1q_u8(src); + src += src_stride; + a2 = vld1q_u8(src); + src += src_stride; + a3 = vld1q_u8(src); + src += src_stride; + + for (row = 0; row < size; row += 4) { + uint8x16_t v_out_0, v_out_1, v_out_2, v_out_3; + const uint8x16_t filterq = vld1q_u8(f + col); + + a4 = vld1q_u8(src); + src += src_stride; + a5 = vld1q_u8(src); + src += src_stride; + a6 = vld1q_u8(src); + src += src_stride; + a7 = vld1q_u8(src); + src += src_stride; + + v_out_0 = generate_outputq(a0, a1, a2, a3, a4, filterq); + v_out_1 = generate_outputq(a1, a2, a3, a4, a5, filterq); + v_out_2 = generate_outputq(a2, a3, a4, a5, a6, filterq); + v_out_3 = generate_outputq(a3, a4, a5, a6, a7, filterq); + + vst1q_u8(dst, v_out_0); + dst += dst_stride; + vst1q_u8(dst, v_out_1); + dst += dst_stride; + vst1q_u8(dst, v_out_2); + dst += dst_stride; + vst1q_u8(dst, v_out_3); + dst += dst_stride; + + // Rotate over to the next slot. + a0 = a4; + a1 = a5; + a2 = a6; + a3 = a7; + } + + src_ptr += 16; + dst_ptr += 16; + } + + // Clean up any left over column of length 8. + if (col != cols) { + uint8x8_t a0, a1, a2, a3, a4, a5, a6, a7; + src = src_ptr - 2 * src_stride; + dst = dst_ptr; + + a0 = vld1_u8(src); + src += src_stride; + a1 = vld1_u8(src); + src += src_stride; + a2 = vld1_u8(src); + src += src_stride; + a3 = vld1_u8(src); + src += src_stride; + + for (row = 0; row < size; row += 4) { + uint8x8_t v_out_0, v_out_1, v_out_2, v_out_3; + const uint8x8_t filter = vld1_u8(f + col); + + a4 = vld1_u8(src); + src += src_stride; + a5 = vld1_u8(src); + src += src_stride; + a6 = vld1_u8(src); + src += src_stride; + a7 = vld1_u8(src); + src += src_stride; + + v_out_0 = generate_output(a0, a1, a2, a3, a4, filter); + v_out_1 = generate_output(a1, a2, a3, a4, a5, filter); + v_out_2 = generate_output(a2, a3, a4, a5, a6, filter); + v_out_3 = generate_output(a3, a4, a5, a6, a7, filter); + + vst1_u8(dst, v_out_0); + dst += dst_stride; + vst1_u8(dst, v_out_1); + dst += dst_stride; + vst1_u8(dst, v_out_2); + dst += dst_stride; + vst1_u8(dst, v_out_3); + dst += dst_stride; + + // Rotate over to the next slot. + a0 = a4; + a1 = a5; + a2 = a6; + a3 = a7; + } + + // Not strictly necessary but makes resetting dst_ptr easier. + dst_ptr += 8; + } + + dst_ptr -= cols; + + for (row = 0; row < size; row += 8) { + uint8x8_t a0, a1, a2, a3; + uint8x8_t b0, b1, b2, b3, b4, b5, b6, b7; + + src = dst_ptr; + dst = dst_ptr; + + // Load 8 values, transpose 4 of them, and discard 2 because they will be + // reloaded later. + load_and_transpose_u8_4x8(src, dst_stride, &a0, &a1, &a2, &a3); + a3 = a1; + a2 = a1 = a0; // Extend left border. + + src += 2; + + for (col = 0; col < cols; col += 8) { + uint8x8_t v_out_0, v_out_1, v_out_2, v_out_3, v_out_4, v_out_5, v_out_6, + v_out_7; + // Although the filter is meant to be applied vertically and is instead + // being applied horizontally here it's OK because it's set in blocks of 8 + // (or 16). + const uint8x8_t filter = vld1_u8(f + col); + + load_and_transpose_u8_8x8(src, dst_stride, &b0, &b1, &b2, &b3, &b4, &b5, + &b6, &b7); + + if (col + 8 == cols) { + // Last row. Extend border (b5). + b6 = b7 = b5; + } + + v_out_0 = generate_output(a0, a1, a2, a3, b0, filter); + v_out_1 = generate_output(a1, a2, a3, b0, b1, filter); + v_out_2 = generate_output(a2, a3, b0, b1, b2, filter); + v_out_3 = generate_output(a3, b0, b1, b2, b3, filter); + v_out_4 = generate_output(b0, b1, b2, b3, b4, filter); + v_out_5 = generate_output(b1, b2, b3, b4, b5, filter); + v_out_6 = generate_output(b2, b3, b4, b5, b6, filter); + v_out_7 = generate_output(b3, b4, b5, b6, b7, filter); + + transpose_and_store_u8_8x8(dst, dst_stride, v_out_0, v_out_1, v_out_2, + v_out_3, v_out_4, v_out_5, v_out_6, v_out_7); + + a0 = b4; + a1 = b5; + a2 = b6; + a3 = b7; + + src += 8; + dst += 8; + } + + dst_ptr += 8 * dst_stride; + } +} + +// sum += x; +// sumsq += x * y; +static void accumulate_sum_sumsq(const int16x4_t x, const int32x4_t xy, + int16x4_t *const sum, int32x4_t *const sumsq) { + const int16x4_t zero = vdup_n_s16(0); + const int32x4_t zeroq = vdupq_n_s32(0); + + // Add in the first set because vext doesn't work with '0'. + *sum = vadd_s16(*sum, x); + *sumsq = vaddq_s32(*sumsq, xy); + + // Shift x and xy to the right and sum. vext requires an immediate. + *sum = vadd_s16(*sum, vext_s16(zero, x, 1)); + *sumsq = vaddq_s32(*sumsq, vextq_s32(zeroq, xy, 1)); + + *sum = vadd_s16(*sum, vext_s16(zero, x, 2)); + *sumsq = vaddq_s32(*sumsq, vextq_s32(zeroq, xy, 2)); + + *sum = vadd_s16(*sum, vext_s16(zero, x, 3)); + *sumsq = vaddq_s32(*sumsq, vextq_s32(zeroq, xy, 3)); +} + +// Generate mask based on (sumsq * 15 - sum * sum < flimit) +static uint16x4_t calculate_mask(const int16x4_t sum, const int32x4_t sumsq, + const int32x4_t f, const int32x4_t fifteen) { + const int32x4_t a = vmulq_s32(sumsq, fifteen); + const int32x4_t b = vmlsl_s16(a, sum, sum); + const uint32x4_t mask32 = vcltq_s32(b, f); + return vmovn_u32(mask32); +} + +static uint8x8_t combine_mask(const int16x4_t sum_low, const int16x4_t sum_high, + const int32x4_t sumsq_low, + const int32x4_t sumsq_high, const int32x4_t f) { + const int32x4_t fifteen = vdupq_n_s32(15); + const uint16x4_t mask16_low = calculate_mask(sum_low, sumsq_low, f, fifteen); + const uint16x4_t mask16_high = + calculate_mask(sum_high, sumsq_high, f, fifteen); + return vmovn_u16(vcombine_u16(mask16_low, mask16_high)); +} + +// Apply filter of (8 + sum + s[c]) >> 4. +static uint8x8_t filter_pixels(const int16x8_t sum, const uint8x8_t s) { + const int16x8_t s16 = vreinterpretq_s16_u16(vmovl_u8(s)); + const int16x8_t sum_s = vaddq_s16(sum, s16); + + return vqrshrun_n_s16(sum_s, 4); +} + +void vpx_mbpost_proc_across_ip_neon(uint8_t *src, int pitch, int rows, int cols, + int flimit) { + int row, col; + const int32x4_t f = vdupq_n_s32(flimit); + + assert(cols % 8 == 0); + + for (row = 0; row < rows; ++row) { + // Sum the first 8 elements, which are extended from s[0]. + // sumsq gets primed with +16. + int sumsq = src[0] * src[0] * 9 + 16; + int sum = src[0] * 9; + + uint8x8_t left_context, s, right_context; + int16x4_t sum_low, sum_high; + int32x4_t sumsq_low, sumsq_high; + + // Sum (+square) the next 6 elements. + // Skip [0] because it's included above. + for (col = 1; col <= 6; ++col) { + sumsq += src[col] * src[col]; + sum += src[col]; + } + + // Prime the sums. Later the loop uses the _high values to prime the new + // vectors. + sumsq_high = vdupq_n_s32(sumsq); + sum_high = vdup_n_s16(sum); + + // Manually extend the left border. + left_context = vdup_n_u8(src[0]); + + for (col = 0; col < cols; col += 8) { + uint8x8_t mask, output; + int16x8_t x, y; + int32x4_t xy_low, xy_high; + + s = vld1_u8(src + col); + + if (col + 8 == cols) { + // Last row. Extend border. + right_context = vdup_n_u8(src[col + 7]); + } else { + right_context = vld1_u8(src + col + 7); + } + + x = vreinterpretq_s16_u16(vsubl_u8(right_context, left_context)); + y = vreinterpretq_s16_u16(vaddl_u8(right_context, left_context)); + xy_low = vmull_s16(vget_low_s16(x), vget_low_s16(y)); + xy_high = vmull_s16(vget_high_s16(x), vget_high_s16(y)); + + // Catch up to the last sum'd value. + sum_low = vdup_lane_s16(sum_high, 3); + sumsq_low = vdupq_lane_s32(vget_high_s32(sumsq_high), 1); + + accumulate_sum_sumsq(vget_low_s16(x), xy_low, &sum_low, &sumsq_low); + + // Need to do this sequentially because we need the max value from + // sum_low. + sum_high = vdup_lane_s16(sum_low, 3); + sumsq_high = vdupq_lane_s32(vget_high_s32(sumsq_low), 1); + + accumulate_sum_sumsq(vget_high_s16(x), xy_high, &sum_high, &sumsq_high); + + mask = combine_mask(sum_low, sum_high, sumsq_low, sumsq_high, f); + + output = filter_pixels(vcombine_s16(sum_low, sum_high), s); + output = vbsl_u8(mask, output, s); + + vst1_u8(src + col, output); + + left_context = s; + } + + src += pitch; + } +} + +// Apply filter of (vpx_rv + sum + s[c]) >> 4. +static uint8x8_t filter_pixels_rv(const int16x8_t sum, const uint8x8_t s, + const int16x8_t rv) { + const int16x8_t s16 = vreinterpretq_s16_u16(vmovl_u8(s)); + const int16x8_t sum_s = vaddq_s16(sum, s16); + const int16x8_t rounded = vaddq_s16(sum_s, rv); + + return vqshrun_n_s16(rounded, 4); +} + +void vpx_mbpost_proc_down_neon(uint8_t *dst, int pitch, int rows, int cols, + int flimit) { + int row, col, i; + const int32x4_t f = vdupq_n_s32(flimit); + uint8x8_t below_context = vdup_n_u8(0); + + // 8 columns are processed at a time. + // If rows is less than 8 the bottom border extension fails. + assert(cols % 8 == 0); + assert(rows >= 8); + + // Load and keep the first 8 values in memory. Process a vertical stripe that + // is 8 wide. + for (col = 0; col < cols; col += 8) { + uint8x8_t s, above_context[8]; + int16x8_t sum, sum_tmp; + int32x4_t sumsq_low, sumsq_high; + + // Load and extend the top border. + s = vld1_u8(dst); + for (i = 0; i < 8; i++) { + above_context[i] = s; + } + + sum_tmp = vreinterpretq_s16_u16(vmovl_u8(s)); + + // sum * 9 + sum = vmulq_n_s16(sum_tmp, 9); + + // (sum * 9) * sum == sum * sum * 9 + sumsq_low = vmull_s16(vget_low_s16(sum), vget_low_s16(sum_tmp)); + sumsq_high = vmull_s16(vget_high_s16(sum), vget_high_s16(sum_tmp)); + + // Load and discard the next 6 values to prime sum and sumsq. + for (i = 1; i <= 6; ++i) { + const uint8x8_t a = vld1_u8(dst + i * pitch); + const int16x8_t b = vreinterpretq_s16_u16(vmovl_u8(a)); + sum = vaddq_s16(sum, b); + + sumsq_low = vmlal_s16(sumsq_low, vget_low_s16(b), vget_low_s16(b)); + sumsq_high = vmlal_s16(sumsq_high, vget_high_s16(b), vget_high_s16(b)); + } + + for (row = 0; row < rows; ++row) { + uint8x8_t mask, output; + int16x8_t x, y; + int32x4_t xy_low, xy_high; + + s = vld1_u8(dst + row * pitch); + + // Extend the bottom border. + if (row + 7 < rows) { + below_context = vld1_u8(dst + (row + 7) * pitch); + } + + x = vreinterpretq_s16_u16(vsubl_u8(below_context, above_context[0])); + y = vreinterpretq_s16_u16(vaddl_u8(below_context, above_context[0])); + xy_low = vmull_s16(vget_low_s16(x), vget_low_s16(y)); + xy_high = vmull_s16(vget_high_s16(x), vget_high_s16(y)); + + sum = vaddq_s16(sum, x); + + sumsq_low = vaddq_s32(sumsq_low, xy_low); + sumsq_high = vaddq_s32(sumsq_high, xy_high); + + mask = combine_mask(vget_low_s16(sum), vget_high_s16(sum), sumsq_low, + sumsq_high, f); + + output = filter_pixels_rv(sum, s, vld1q_s16(vpx_rv + (row & 127))); + output = vbsl_u8(mask, output, s); + + vst1_u8(dst + row * pitch, output); + + above_context[0] = above_context[1]; + above_context[1] = above_context[2]; + above_context[2] = above_context[3]; + above_context[3] = above_context[4]; + above_context[4] = above_context[5]; + above_context[5] = above_context[6]; + above_context[6] = above_context[7]; + above_context[7] = s; + } + + dst += 8; + } +} |