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media/libvpx/vp8/encoder/x86/denoising_sse2.c@b8a032363ba2 (annotated)

media/libvpx/vp8/encoder/x86/denoising_sse2.c

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/*
michael@0	2	* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license
michael@0	5	* that can be found in the LICENSE file in the root of the source
michael@0	6	* tree. An additional intellectual property rights grant can be found
michael@0	7	* in the file PATENTS. All contributing project authors may
michael@0	8	* be found in the AUTHORS file in the root of the source tree.
michael@0	9	*/
michael@0	10
michael@0	11	#include "vp8/encoder/denoising.h"
michael@0	12	#include "vp8/common/reconinter.h"
michael@0	13	#include "vpx/vpx_integer.h"
michael@0	14	#include "vpx_mem/vpx_mem.h"
michael@0	15	#include "vp8_rtcd.h"
michael@0	16
michael@0	17	#include <emmintrin.h>
michael@0	18	#include "vpx_ports/emmintrin_compat.h"
michael@0	19
michael@0	20	union sum_union {
michael@0	21	__m128i v;
michael@0	22	signed char e[16];
michael@0	23	};
michael@0	24
michael@0	25	int vp8_denoiser_filter_sse2(YV12_BUFFER_CONFIG *mc_running_avg,
michael@0	26	YV12_BUFFER_CONFIG *running_avg,
michael@0	27	MACROBLOCK *signal, unsigned int motion_magnitude,
michael@0	28	int y_offset, int uv_offset)
michael@0	29	{
michael@0	30	unsigned char *sig = signal->thismb;
michael@0	31	int sig_stride = 16;
michael@0	32	unsigned char *mc_running_avg_y = mc_running_avg->y_buffer + y_offset;
michael@0	33	int mc_avg_y_stride = mc_running_avg->y_stride;
michael@0	34	unsigned char *running_avg_y = running_avg->y_buffer + y_offset;
michael@0	35	int avg_y_stride = running_avg->y_stride;
michael@0	36	int r;
michael@0	37	__m128i acc_diff = _mm_setzero_si128();
michael@0	38	const __m128i k_0 = _mm_setzero_si128();
michael@0	39	const __m128i k_4 = _mm_set1_epi8(4);
michael@0	40	const __m128i k_8 = _mm_set1_epi8(8);
michael@0	41	const __m128i k_16 = _mm_set1_epi8(16);
michael@0	42	/* Modify each level's adjustment according to motion_magnitude. */
michael@0	43	const __m128i l3 = _mm_set1_epi8(
michael@0	44	(motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) ? 7 : 6);
michael@0	45	/* Difference between level 3 and level 2 is 2. */
michael@0	46	const __m128i l32 = _mm_set1_epi8(2);
michael@0	47	/* Difference between level 2 and level 1 is 1. */
michael@0	48	const __m128i l21 = _mm_set1_epi8(1);
michael@0	49
michael@0	50	for (r = 0; r < 16; ++r)
michael@0	51	{
michael@0	52	/* Calculate differences */
michael@0	53	const __m128i v_sig = _mm_loadu_si128((__m128i *)(&sig[0]));
michael@0	54	const __m128i v_mc_running_avg_y = _mm_loadu_si128(
michael@0	55	(__m128i *)(&mc_running_avg_y[0]));
michael@0	56	__m128i v_running_avg_y;
michael@0	57	const __m128i pdiff = _mm_subs_epu8(v_mc_running_avg_y, v_sig);
michael@0	58	const __m128i ndiff = _mm_subs_epu8(v_sig, v_mc_running_avg_y);
michael@0	59	/* Obtain the sign. FF if diff is negative. */
michael@0	60	const __m128i diff_sign = _mm_cmpeq_epi8(pdiff, k_0);
michael@0	61	/* Clamp absolute difference to 16 to be used to get mask. Doing this
michael@0	62	* allows us to use _mm_cmpgt_epi8, which operates on signed byte. */
michael@0	63	const __m128i clamped_absdiff = _mm_min_epu8(
michael@0	64	_mm_or_si128(pdiff, ndiff), k_16);
michael@0	65	/* Get masks for l2 l1 and l0 adjustments */
michael@0	66	const __m128i mask2 = _mm_cmpgt_epi8(k_16, clamped_absdiff);
michael@0	67	const __m128i mask1 = _mm_cmpgt_epi8(k_8, clamped_absdiff);
michael@0	68	const __m128i mask0 = _mm_cmpgt_epi8(k_4, clamped_absdiff);
michael@0	69	/* Get adjustments for l2, l1, and l0 */
michael@0	70	__m128i adj2 = _mm_and_si128(mask2, l32);
michael@0	71	const __m128i adj1 = _mm_and_si128(mask1, l21);
michael@0	72	const __m128i adj0 = _mm_and_si128(mask0, clamped_absdiff);
michael@0	73	__m128i adj, padj, nadj;
michael@0	74
michael@0	75	/* Combine the adjustments and get absolute adjustments. */
michael@0	76	adj2 = _mm_add_epi8(adj2, adj1);
michael@0	77	adj = _mm_sub_epi8(l3, adj2);
michael@0	78	adj = _mm_andnot_si128(mask0, adj);
michael@0	79	adj = _mm_or_si128(adj, adj0);
michael@0	80
michael@0	81	/* Restore the sign and get positive and negative adjustments. */
michael@0	82	padj = _mm_andnot_si128(diff_sign, adj);
michael@0	83	nadj = _mm_and_si128(diff_sign, adj);
michael@0	84
michael@0	85	/* Calculate filtered value. */
michael@0	86	v_running_avg_y = _mm_adds_epu8(v_sig, padj);
michael@0	87	v_running_avg_y = _mm_subs_epu8(v_running_avg_y, nadj);
michael@0	88	_mm_storeu_si128((__m128i *)running_avg_y, v_running_avg_y);
michael@0	89
michael@0	90	/* Adjustments <=7, and each element in acc_diff can fit in signed
michael@0	91	* char.
michael@0	92	*/
michael@0	93	acc_diff = _mm_adds_epi8(acc_diff, padj);
michael@0	94	acc_diff = _mm_subs_epi8(acc_diff, nadj);
michael@0	95
michael@0	96	/* Update pointers for next iteration. */
michael@0	97	sig += sig_stride;
michael@0	98	mc_running_avg_y += mc_avg_y_stride;
michael@0	99	running_avg_y += avg_y_stride;
michael@0	100	}
michael@0	101
michael@0	102	{
michael@0	103	/* Compute the sum of all pixel differences of this MB. */
michael@0	104	union sum_union s;
michael@0	105	int sum_diff = 0;
michael@0	106	s.v = acc_diff;
michael@0	107	sum_diff = s.e[0] + s.e[1] + s.e[2] + s.e[3] + s.e[4] + s.e[5]
michael@0	108	+ s.e[6] + s.e[7] + s.e[8] + s.e[9] + s.e[10] + s.e[11]
michael@0	109	+ s.e[12] + s.e[13] + s.e[14] + s.e[15];
michael@0	110
michael@0	111	if (abs(sum_diff) > SUM_DIFF_THRESHOLD)
michael@0	112	{
michael@0	113	return COPY_BLOCK;
michael@0	114	}
michael@0	115	}
michael@0	116
michael@0	117	vp8_copy_mem16x16(running_avg->y_buffer + y_offset, avg_y_stride,
michael@0	118	signal->thismb, sig_stride);
michael@0	119	return FILTER_BLOCK;
michael@0	120	}