int vp8_denoiser_filter_neon(YV12_BUFFER_CONFIG *mc_running_avg, YV12_BUFFER_CONFIG *running_avg, MACROBLOCK *signal, unsigned int motion_magnitude, int y_offset, int uv_offset) { /* If motion_magnitude is small, making the denoiser more aggressive by * increasing the adjustment for each level, level1 adjustment is * increased, the deltas stay the same. */ const uint8x16_t v_level1_adjustment = vdupq_n_u8( (motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) ? 4 : 3); const uint8x16_t v_delta_level_1_and_2 = vdupq_n_u8(1); const uint8x16_t v_delta_level_2_and_3 = vdupq_n_u8(2); const uint8x16_t v_level1_threshold = vdupq_n_u8(4); const uint8x16_t v_level2_threshold = vdupq_n_u8(8); const uint8x16_t v_level3_threshold = vdupq_n_u8(16); /* Local variables for array pointers and strides. */ unsigned char *sig = signal->thismb; int sig_stride = 16; unsigned char *mc_running_avg_y = mc_running_avg->y_buffer + y_offset; int mc_running_avg_y_stride = mc_running_avg->y_stride; unsigned char *running_avg_y = running_avg->y_buffer + y_offset; int running_avg_y_stride = running_avg->y_stride; /* Go over lines. */ int i; int sum_diff = 0; for (i = 0; i < 16; ++i) { int8x16_t v_sum_diff = vdupq_n_s8(0); uint8x16_t v_running_avg_y; /* Load inputs. */ const uint8x16_t v_sig = vld1q_u8(sig); const uint8x16_t v_mc_running_avg_y = vld1q_u8(mc_running_avg_y); /* Calculate absolute difference and sign masks. */ const uint8x16_t v_abs_diff = vabdq_u8(v_sig, v_mc_running_avg_y); const uint8x16_t v_diff_pos_mask = vcltq_u8(v_sig, v_mc_running_avg_y); const uint8x16_t v_diff_neg_mask = vcgtq_u8(v_sig, v_mc_running_avg_y); /* Figure out which level that put us in. */ const uint8x16_t v_level1_mask = vcleq_u8(v_level1_threshold, v_abs_diff); const uint8x16_t v_level2_mask = vcleq_u8(v_level2_threshold, v_abs_diff); const uint8x16_t v_level3_mask = vcleq_u8(v_level3_threshold, v_abs_diff); /* Calculate absolute adjustments for level 1, 2 and 3. */ const uint8x16_t v_level2_adjustment = vandq_u8(v_level2_mask, v_delta_level_1_and_2); const uint8x16_t v_level3_adjustment = vandq_u8(v_level3_mask, v_delta_level_2_and_3); const uint8x16_t v_level1and2_adjustment = vaddq_u8(v_level1_adjustment, v_level2_adjustment); const uint8x16_t v_level1and2and3_adjustment = vaddq_u8( v_level1and2_adjustment, v_level3_adjustment); /* Figure adjustment absolute value by selecting between the absolute * difference if in level0 or the value for level 1, 2 and 3. */ const uint8x16_t v_abs_adjustment = vbslq_u8(v_level1_mask, v_level1and2and3_adjustment, v_abs_diff); /* Calculate positive and negative adjustments. Apply them to the signal * and accumulate them. Adjustments are less than eight and the maximum * sum of them (7 * 16) can fit in a signed char. */ const uint8x16_t v_pos_adjustment = vandq_u8(v_diff_pos_mask, v_abs_adjustment); const uint8x16_t v_neg_adjustment = vandq_u8(v_diff_neg_mask, v_abs_adjustment); v_running_avg_y = vqaddq_u8(v_sig, v_pos_adjustment); v_running_avg_y = vqsubq_u8(v_running_avg_y, v_neg_adjustment); v_sum_diff = vqaddq_s8(v_sum_diff, vreinterpretq_s8_u8(v_pos_adjustment)); v_sum_diff = vqsubq_s8(v_sum_diff, vreinterpretq_s8_u8(v_neg_adjustment)); /* Store results. */ vst1q_u8(running_avg_y, v_running_avg_y); /* Sum all the accumulators to have the sum of all pixel differences * for this macroblock. */ { int s0 = vgetq_lane_s8(v_sum_diff, 0) + vgetq_lane_s8(v_sum_diff, 1) + vgetq_lane_s8(v_sum_diff, 2) + vgetq_lane_s8(v_sum_diff, 3); int s1 = vgetq_lane_s8(v_sum_diff, 4) + vgetq_lane_s8(v_sum_diff, 5) + vgetq_lane_s8(v_sum_diff, 6) + vgetq_lane_s8(v_sum_diff, 7); int s2 = vgetq_lane_s8(v_sum_diff, 8) + vgetq_lane_s8(v_sum_diff, 9) + vgetq_lane_s8(v_sum_diff, 10) + vgetq_lane_s8(v_sum_diff, 11); int s3 = vgetq_lane_s8(v_sum_diff, 12) + vgetq_lane_s8(v_sum_diff, 13) + vgetq_lane_s8(v_sum_diff, 14) + vgetq_lane_s8(v_sum_diff, 15); sum_diff += s0 + s1+ s2 + s3; } /* Update pointers for next iteration. */ sig += sig_stride; mc_running_avg_y += mc_running_avg_y_stride; running_avg_y += running_avg_y_stride; } /* Too much adjustments => copy block. */ if (abs(sum_diff) > SUM_DIFF_THRESHOLD) return COPY_BLOCK; /* Tell above level that block was filtered. */ vp8_copy_mem16x16(running_avg->y_buffer + y_offset, running_avg_y_stride, signal->thismb, sig_stride); return FILTER_BLOCK; }
SIMD_INLINE uint8x16_t AdjustEdge(const uint8x16_t & count, const uint8x16_t & value, const uint8x16_t & mask, const uint8x16_t & threshold) { const uint8x16_t inc = vandq_u8(mask, vcgtq_u8(count, threshold)); const uint8x16_t dec = vandq_u8(mask, vcltq_u8(count, threshold)); return vqsubq_u8(vqaddq_u8(value, inc), dec); }
int vp8_denoiser_filter_neon(unsigned char *mc_running_avg_y, int mc_running_avg_y_stride, unsigned char *running_avg_y, int running_avg_y_stride, unsigned char *sig, int sig_stride, unsigned int motion_magnitude, int increase_denoising) { /* If motion_magnitude is small, making the denoiser more aggressive by * increasing the adjustment for each level, level1 adjustment is * increased, the deltas stay the same. */ int shift_inc = (increase_denoising && motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) ? 1 : 0; const uint8x16_t v_level1_adjustment = vmovq_n_u8( (motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) ? 4 + shift_inc : 3); const uint8x16_t v_delta_level_1_and_2 = vdupq_n_u8(1); const uint8x16_t v_delta_level_2_and_3 = vdupq_n_u8(2); const uint8x16_t v_level1_threshold = vmovq_n_u8(4 + shift_inc); const uint8x16_t v_level2_threshold = vdupq_n_u8(8); const uint8x16_t v_level3_threshold = vdupq_n_u8(16); int64x2_t v_sum_diff_total = vdupq_n_s64(0); /* Go over lines. */ int r; for (r = 0; r < 16; ++r) { /* Load inputs. */ const uint8x16_t v_sig = vld1q_u8(sig); const uint8x16_t v_mc_running_avg_y = vld1q_u8(mc_running_avg_y); /* Calculate absolute difference and sign masks. */ const uint8x16_t v_abs_diff = vabdq_u8(v_sig, v_mc_running_avg_y); const uint8x16_t v_diff_pos_mask = vcltq_u8(v_sig, v_mc_running_avg_y); const uint8x16_t v_diff_neg_mask = vcgtq_u8(v_sig, v_mc_running_avg_y); /* Figure out which level that put us in. */ const uint8x16_t v_level1_mask = vcleq_u8(v_level1_threshold, v_abs_diff); const uint8x16_t v_level2_mask = vcleq_u8(v_level2_threshold, v_abs_diff); const uint8x16_t v_level3_mask = vcleq_u8(v_level3_threshold, v_abs_diff); /* Calculate absolute adjustments for level 1, 2 and 3. */ const uint8x16_t v_level2_adjustment = vandq_u8(v_level2_mask, v_delta_level_1_and_2); const uint8x16_t v_level3_adjustment = vandq_u8(v_level3_mask, v_delta_level_2_and_3); const uint8x16_t v_level1and2_adjustment = vaddq_u8(v_level1_adjustment, v_level2_adjustment); const uint8x16_t v_level1and2and3_adjustment = vaddq_u8( v_level1and2_adjustment, v_level3_adjustment); /* Figure adjustment absolute value by selecting between the absolute * difference if in level0 or the value for level 1, 2 and 3. */ const uint8x16_t v_abs_adjustment = vbslq_u8(v_level1_mask, v_level1and2and3_adjustment, v_abs_diff); /* Calculate positive and negative adjustments. Apply them to the signal * and accumulate them. Adjustments are less than eight and the maximum * sum of them (7 * 16) can fit in a signed char. */ const uint8x16_t v_pos_adjustment = vandq_u8(v_diff_pos_mask, v_abs_adjustment); const uint8x16_t v_neg_adjustment = vandq_u8(v_diff_neg_mask, v_abs_adjustment); uint8x16_t v_running_avg_y = vqaddq_u8(v_sig, v_pos_adjustment); v_running_avg_y = vqsubq_u8(v_running_avg_y, v_neg_adjustment); /* Store results. */ vst1q_u8(running_avg_y, v_running_avg_y); /* Sum all the accumulators to have the sum of all pixel differences * for this macroblock. */ { const int8x16_t v_sum_diff = vqsubq_s8(vreinterpretq_s8_u8(v_pos_adjustment), vreinterpretq_s8_u8(v_neg_adjustment)); const int16x8_t fe_dc_ba_98_76_54_32_10 = vpaddlq_s8(v_sum_diff); const int32x4_t fedc_ba98_7654_3210 = vpaddlq_s16(fe_dc_ba_98_76_54_32_10); const int64x2_t fedcba98_76543210 = vpaddlq_s32(fedc_ba98_7654_3210); v_sum_diff_total = vqaddq_s64(v_sum_diff_total, fedcba98_76543210); } /* Update pointers for next iteration. */ sig += sig_stride; mc_running_avg_y += mc_running_avg_y_stride; running_avg_y += running_avg_y_stride; } /* Too much adjustments => copy block. */ { int64x1_t x = vqadd_s64(vget_high_s64(v_sum_diff_total), vget_low_s64(v_sum_diff_total)); int sum_diff = vget_lane_s32(vabs_s32(vreinterpret_s32_s64(x)), 0); int sum_diff_thresh = SUM_DIFF_THRESHOLD; if (increase_denoising) sum_diff_thresh = SUM_DIFF_THRESHOLD_HIGH; if (sum_diff > sum_diff_thresh) { // Before returning to copy the block (i.e., apply no denoising), // checK if we can still apply some (weaker) temporal filtering to // this block, that would otherwise not be denoised at all. Simplest // is to apply an additional adjustment to running_avg_y to bring it // closer to sig. The adjustment is capped by a maximum delta, and // chosen such that in most cases the resulting sum_diff will be // within the accceptable range given by sum_diff_thresh. // The delta is set by the excess of absolute pixel diff over the // threshold. int delta = ((sum_diff - sum_diff_thresh) >> 8) + 1; // Only apply the adjustment for max delta up to 3. if (delta < 4) { const uint8x16_t k_delta = vmovq_n_u8(delta); sig -= sig_stride * 16; mc_running_avg_y -= mc_running_avg_y_stride * 16; running_avg_y -= running_avg_y_stride * 16; for (r = 0; r < 16; ++r) { uint8x16_t v_running_avg_y = vld1q_u8(running_avg_y); const uint8x16_t v_sig = vld1q_u8(sig); const uint8x16_t v_mc_running_avg_y = vld1q_u8(mc_running_avg_y); /* Calculate absolute difference and sign masks. */ const uint8x16_t v_abs_diff = vabdq_u8(v_sig, v_mc_running_avg_y); const uint8x16_t v_diff_pos_mask = vcltq_u8(v_sig, v_mc_running_avg_y); const uint8x16_t v_diff_neg_mask = vcgtq_u8(v_sig, v_mc_running_avg_y); // Clamp absolute difference to delta to get the adjustment. const uint8x16_t v_abs_adjustment = vminq_u8(v_abs_diff, (k_delta)); const uint8x16_t v_pos_adjustment = vandq_u8(v_diff_pos_mask, v_abs_adjustment); const uint8x16_t v_neg_adjustment = vandq_u8(v_diff_neg_mask, v_abs_adjustment); v_running_avg_y = vqsubq_u8(v_running_avg_y, v_pos_adjustment); v_running_avg_y = vqaddq_u8(v_running_avg_y, v_neg_adjustment); /* Store results. */ vst1q_u8(running_avg_y, v_running_avg_y); { const int8x16_t v_sum_diff = vqsubq_s8(vreinterpretq_s8_u8(v_neg_adjustment), vreinterpretq_s8_u8(v_pos_adjustment)); const int16x8_t fe_dc_ba_98_76_54_32_10 = vpaddlq_s8(v_sum_diff); const int32x4_t fedc_ba98_7654_3210 = vpaddlq_s16(fe_dc_ba_98_76_54_32_10); const int64x2_t fedcba98_76543210 = vpaddlq_s32(fedc_ba98_7654_3210); v_sum_diff_total = vqaddq_s64(v_sum_diff_total, fedcba98_76543210); } /* Update pointers for next iteration. */ sig += sig_stride; mc_running_avg_y += mc_running_avg_y_stride; running_avg_y += running_avg_y_stride; } { // Update the sum of all pixel differences of this MB. x = vqadd_s64(vget_high_s64(v_sum_diff_total), vget_low_s64(v_sum_diff_total)); sum_diff = vget_lane_s32(vabs_s32(vreinterpret_s32_s64(x)), 0); if (sum_diff > sum_diff_thresh) { return COPY_BLOCK; } } } else { return COPY_BLOCK; } } }