395 строки
16 KiB
C
395 строки
16 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "./vpx_config.h"
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#include "./vp9_rtcd.h"
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#include "./vpx_dsp_rtcd.h"
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#include "./vpx_scale_rtcd.h"
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#include "vp9/common/vp9_onyxc_int.h"
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#include "vp9/common/vp9_postproc.h"
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// TODO(jackychen): Replace this function with SSE2 code. There is
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// one SSE2 implementation in vp8, so will consider how to share it
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// between vp8 and vp9.
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static void filter_by_weight(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride,
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int block_size, int src_weight) {
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const int dst_weight = (1 << MFQE_PRECISION) - src_weight;
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const int rounding_bit = 1 << (MFQE_PRECISION - 1);
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int r, c;
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for (r = 0; r < block_size; r++) {
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for (c = 0; c < block_size; c++) {
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dst[c] = (src[c] * src_weight + dst[c] * dst_weight + rounding_bit)
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>> MFQE_PRECISION;
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}
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src += src_stride;
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dst += dst_stride;
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}
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}
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void vp9_filter_by_weight8x8_c(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride, int src_weight) {
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filter_by_weight(src, src_stride, dst, dst_stride, 8, src_weight);
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}
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void vp9_filter_by_weight16x16_c(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride,
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int src_weight) {
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filter_by_weight(src, src_stride, dst, dst_stride, 16, src_weight);
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}
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static void filter_by_weight32x32(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride, int weight) {
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vp9_filter_by_weight16x16(src, src_stride, dst, dst_stride, weight);
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vp9_filter_by_weight16x16(src + 16, src_stride, dst + 16, dst_stride,
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weight);
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vp9_filter_by_weight16x16(src + src_stride * 16, src_stride,
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dst + dst_stride * 16, dst_stride, weight);
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vp9_filter_by_weight16x16(src + src_stride * 16 + 16, src_stride,
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dst + dst_stride * 16 + 16, dst_stride, weight);
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}
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static void filter_by_weight64x64(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride, int weight) {
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filter_by_weight32x32(src, src_stride, dst, dst_stride, weight);
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filter_by_weight32x32(src + 32, src_stride, dst + 32,
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dst_stride, weight);
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filter_by_weight32x32(src + src_stride * 32, src_stride,
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dst + dst_stride * 32, dst_stride, weight);
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filter_by_weight32x32(src + src_stride * 32 + 32, src_stride,
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dst + dst_stride * 32 + 32, dst_stride, weight);
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}
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static void apply_ifactor(const uint8_t *y, int y_stride, uint8_t *yd,
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int yd_stride, const uint8_t *u, const uint8_t *v,
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int uv_stride, uint8_t *ud, uint8_t *vd,
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int uvd_stride, BLOCK_SIZE block_size,
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int weight) {
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if (block_size == BLOCK_16X16) {
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vp9_filter_by_weight16x16(y, y_stride, yd, yd_stride, weight);
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vp9_filter_by_weight8x8(u, uv_stride, ud, uvd_stride, weight);
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vp9_filter_by_weight8x8(v, uv_stride, vd, uvd_stride, weight);
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} else if (block_size == BLOCK_32X32) {
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filter_by_weight32x32(y, y_stride, yd, yd_stride, weight);
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vp9_filter_by_weight16x16(u, uv_stride, ud, uvd_stride, weight);
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vp9_filter_by_weight16x16(v, uv_stride, vd, uvd_stride, weight);
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} else if (block_size == BLOCK_64X64) {
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filter_by_weight64x64(y, y_stride, yd, yd_stride, weight);
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filter_by_weight32x32(u, uv_stride, ud, uvd_stride, weight);
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filter_by_weight32x32(v, uv_stride, vd, uvd_stride, weight);
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}
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}
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// TODO(jackychen): Determine whether replace it with assembly code.
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static void copy_mem8x8(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride) {
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int r;
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for (r = 0; r < 8; r++) {
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memcpy(dst, src, 8);
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src += src_stride;
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dst += dst_stride;
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}
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}
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static void copy_mem16x16(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride) {
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int r;
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for (r = 0; r < 16; r++) {
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memcpy(dst, src, 16);
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src += src_stride;
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dst += dst_stride;
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}
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}
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static void copy_mem32x32(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride) {
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copy_mem16x16(src, src_stride, dst, dst_stride);
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copy_mem16x16(src + 16, src_stride, dst + 16, dst_stride);
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copy_mem16x16(src + src_stride * 16, src_stride,
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dst + dst_stride * 16, dst_stride);
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copy_mem16x16(src + src_stride * 16 + 16, src_stride,
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dst + dst_stride * 16 + 16, dst_stride);
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}
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static void copy_mem64x64(const uint8_t *src, int src_stride,
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uint8_t *dst, int dst_stride) {
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copy_mem32x32(src, src_stride, dst, dst_stride);
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copy_mem32x32(src + 32, src_stride, dst + 32, dst_stride);
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copy_mem32x32(src + src_stride * 32, src_stride,
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dst + src_stride * 32, dst_stride);
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copy_mem32x32(src + src_stride * 32 + 32, src_stride,
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dst + src_stride * 32 + 32, dst_stride);
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}
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static void copy_block(const uint8_t *y, const uint8_t *u, const uint8_t *v,
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int y_stride, int uv_stride, uint8_t *yd, uint8_t *ud,
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uint8_t *vd, int yd_stride, int uvd_stride,
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BLOCK_SIZE bs) {
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if (bs == BLOCK_16X16) {
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copy_mem16x16(y, y_stride, yd, yd_stride);
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copy_mem8x8(u, uv_stride, ud, uvd_stride);
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copy_mem8x8(v, uv_stride, vd, uvd_stride);
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} else if (bs == BLOCK_32X32) {
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copy_mem32x32(y, y_stride, yd, yd_stride);
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copy_mem16x16(u, uv_stride, ud, uvd_stride);
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copy_mem16x16(v, uv_stride, vd, uvd_stride);
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} else {
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copy_mem64x64(y, y_stride, yd, yd_stride);
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copy_mem32x32(u, uv_stride, ud, uvd_stride);
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copy_mem32x32(v, uv_stride, vd, uvd_stride);
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}
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}
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static void get_thr(BLOCK_SIZE bs, int qdiff, int *sad_thr, int *vdiff_thr) {
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const int adj = qdiff >> MFQE_PRECISION;
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if (bs == BLOCK_16X16) {
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*sad_thr = 7 + adj;
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} else if (bs == BLOCK_32X32) {
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*sad_thr = 6 + adj;
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} else { // BLOCK_64X64
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*sad_thr = 5 + adj;
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}
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*vdiff_thr = 125 + qdiff;
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}
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static void mfqe_block(BLOCK_SIZE bs, const uint8_t *y, const uint8_t *u,
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const uint8_t *v, int y_stride, int uv_stride,
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uint8_t *yd, uint8_t *ud, uint8_t *vd, int yd_stride,
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int uvd_stride, int qdiff) {
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int sad, sad_thr, vdiff, vdiff_thr;
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uint32_t sse;
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get_thr(bs, qdiff, &sad_thr, &vdiff_thr);
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if (bs == BLOCK_16X16) {
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vdiff = (vpx_variance16x16(y, y_stride, yd, yd_stride, &sse) + 128) >> 8;
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sad = (vpx_sad16x16(y, y_stride, yd, yd_stride) + 128) >> 8;
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} else if (bs == BLOCK_32X32) {
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vdiff = (vpx_variance32x32(y, y_stride, yd, yd_stride, &sse) + 512) >> 10;
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sad = (vpx_sad32x32(y, y_stride, yd, yd_stride) + 512) >> 10;
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} else /* if (bs == BLOCK_64X64) */ {
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vdiff = (vpx_variance64x64(y, y_stride, yd, yd_stride, &sse) + 2048) >> 12;
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sad = (vpx_sad64x64(y, y_stride, yd, yd_stride) + 2048) >> 12;
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}
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// vdiff > sad * 3 means vdiff should not be too small, otherwise,
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// it might be a lighting change in smooth area. When there is a
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// lighting change in smooth area, it is dangerous to do MFQE.
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if (sad > 1 && vdiff > sad * 3) {
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const int weight = 1 << MFQE_PRECISION;
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int ifactor = weight * sad * vdiff / (sad_thr * vdiff_thr);
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// When ifactor equals weight, no MFQE is done.
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if (ifactor > weight) {
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ifactor = weight;
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}
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apply_ifactor(y, y_stride, yd, yd_stride, u, v, uv_stride, ud, vd,
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uvd_stride, bs, ifactor);
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} else {
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// Copy the block from current frame (i.e., no mfqe is done).
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copy_block(y, u, v, y_stride, uv_stride, yd, ud, vd,
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yd_stride, uvd_stride, bs);
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}
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}
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static int mfqe_decision(MODE_INFO *mi, BLOCK_SIZE cur_bs) {
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// Check the motion in current block(for inter frame),
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// or check the motion in the correlated block in last frame (for keyframe).
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const int mv_len_square = mi->mv[0].as_mv.row *
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mi->mv[0].as_mv.row +
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mi->mv[0].as_mv.col *
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mi->mv[0].as_mv.col;
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const int mv_threshold = 100;
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return mi->mode >= NEARESTMV && // Not an intra block
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cur_bs >= BLOCK_16X16 &&
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mv_len_square <= mv_threshold;
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}
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// Process each partiton in a super block, recursively.
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static void mfqe_partition(VP9_COMMON *cm, MODE_INFO *mi, BLOCK_SIZE bs,
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const uint8_t *y, const uint8_t *u,
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const uint8_t *v, int y_stride, int uv_stride,
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uint8_t *yd, uint8_t *ud, uint8_t *vd,
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int yd_stride, int uvd_stride) {
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int mi_offset, y_offset, uv_offset;
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const BLOCK_SIZE cur_bs = mi->sb_type;
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const int qdiff = cm->base_qindex - cm->postproc_state.last_base_qindex;
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const int bsl = b_width_log2_lookup[bs];
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PARTITION_TYPE partition = partition_lookup[bsl][cur_bs];
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const BLOCK_SIZE subsize = get_subsize(bs, partition);
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if (cur_bs < BLOCK_8X8) {
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// If there are blocks smaller than 8x8, it must be on the boundary.
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return;
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}
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// No MFQE on blocks smaller than 16x16
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if (bs == BLOCK_16X16) {
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partition = PARTITION_NONE;
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}
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if (bs == BLOCK_64X64) {
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mi_offset = 4;
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y_offset = 32;
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uv_offset = 16;
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} else {
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mi_offset = 2;
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y_offset = 16;
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uv_offset = 8;
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}
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switch (partition) {
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BLOCK_SIZE mfqe_bs, bs_tmp;
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case PARTITION_HORZ:
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if (bs == BLOCK_64X64) {
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mfqe_bs = BLOCK_64X32;
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bs_tmp = BLOCK_32X32;
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} else {
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mfqe_bs = BLOCK_32X16;
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bs_tmp = BLOCK_16X16;
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}
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if (mfqe_decision(mi, mfqe_bs)) {
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// Do mfqe on the first square partition.
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mfqe_block(bs_tmp, y, u, v, y_stride, uv_stride,
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yd, ud, vd, yd_stride, uvd_stride, qdiff);
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// Do mfqe on the second square partition.
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mfqe_block(bs_tmp, y + y_offset, u + uv_offset, v + uv_offset,
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y_stride, uv_stride, yd + y_offset, ud + uv_offset,
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vd + uv_offset, yd_stride, uvd_stride, qdiff);
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}
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if (mfqe_decision(mi + mi_offset * cm->mi_stride, mfqe_bs)) {
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// Do mfqe on the first square partition.
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mfqe_block(bs_tmp, y + y_offset * y_stride, u + uv_offset * uv_stride,
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v + uv_offset * uv_stride, y_stride, uv_stride,
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yd + y_offset * yd_stride, ud + uv_offset * uvd_stride,
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vd + uv_offset * uvd_stride, yd_stride, uvd_stride, qdiff);
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// Do mfqe on the second square partition.
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mfqe_block(bs_tmp, y + y_offset * y_stride + y_offset,
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u + uv_offset * uv_stride + uv_offset,
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v + uv_offset * uv_stride + uv_offset, y_stride,
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uv_stride, yd + y_offset * yd_stride + y_offset,
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ud + uv_offset * uvd_stride + uv_offset,
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vd + uv_offset * uvd_stride + uv_offset,
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yd_stride, uvd_stride, qdiff);
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}
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break;
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case PARTITION_VERT:
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if (bs == BLOCK_64X64) {
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mfqe_bs = BLOCK_32X64;
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bs_tmp = BLOCK_32X32;
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} else {
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mfqe_bs = BLOCK_16X32;
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bs_tmp = BLOCK_16X16;
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}
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if (mfqe_decision(mi, mfqe_bs)) {
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// Do mfqe on the first square partition.
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mfqe_block(bs_tmp, y, u, v, y_stride, uv_stride,
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yd, ud, vd, yd_stride, uvd_stride, qdiff);
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// Do mfqe on the second square partition.
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mfqe_block(bs_tmp, y + y_offset * y_stride, u + uv_offset * uv_stride,
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v + uv_offset * uv_stride, y_stride, uv_stride,
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yd + y_offset * yd_stride, ud + uv_offset * uvd_stride,
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vd + uv_offset * uvd_stride, yd_stride, uvd_stride, qdiff);
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}
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if (mfqe_decision(mi + mi_offset, mfqe_bs)) {
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// Do mfqe on the first square partition.
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mfqe_block(bs_tmp, y + y_offset, u + uv_offset, v + uv_offset,
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y_stride, uv_stride, yd + y_offset, ud + uv_offset,
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vd + uv_offset, yd_stride, uvd_stride, qdiff);
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// Do mfqe on the second square partition.
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mfqe_block(bs_tmp, y + y_offset * y_stride + y_offset,
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u + uv_offset * uv_stride + uv_offset,
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v + uv_offset * uv_stride + uv_offset, y_stride,
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uv_stride, yd + y_offset * yd_stride + y_offset,
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ud + uv_offset * uvd_stride + uv_offset,
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vd + uv_offset * uvd_stride + uv_offset,
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yd_stride, uvd_stride, qdiff);
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}
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break;
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case PARTITION_NONE:
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if (mfqe_decision(mi, cur_bs)) {
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// Do mfqe on this partition.
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mfqe_block(cur_bs, y, u, v, y_stride, uv_stride,
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yd, ud, vd, yd_stride, uvd_stride, qdiff);
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} else {
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// Copy the block from current frame(i.e., no mfqe is done).
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copy_block(y, u, v, y_stride, uv_stride, yd, ud, vd,
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yd_stride, uvd_stride, bs);
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}
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break;
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case PARTITION_SPLIT:
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// Recursion on four square partitions, e.g. if bs is 64X64,
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// then look into four 32X32 blocks in it.
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mfqe_partition(cm, mi, subsize, y, u, v, y_stride, uv_stride, yd, ud, vd,
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yd_stride, uvd_stride);
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mfqe_partition(cm, mi + mi_offset, subsize, y + y_offset, u + uv_offset,
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v + uv_offset, y_stride, uv_stride, yd + y_offset,
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ud + uv_offset, vd + uv_offset, yd_stride, uvd_stride);
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mfqe_partition(cm, mi + mi_offset * cm->mi_stride, subsize,
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y + y_offset * y_stride, u + uv_offset * uv_stride,
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v + uv_offset * uv_stride, y_stride, uv_stride,
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yd + y_offset * yd_stride, ud + uv_offset * uvd_stride,
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vd + uv_offset * uvd_stride, yd_stride, uvd_stride);
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mfqe_partition(cm, mi + mi_offset * cm->mi_stride + mi_offset,
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subsize, y + y_offset * y_stride + y_offset,
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u + uv_offset * uv_stride + uv_offset,
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v + uv_offset * uv_stride + uv_offset, y_stride,
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uv_stride, yd + y_offset * yd_stride + y_offset,
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ud + uv_offset * uvd_stride + uv_offset,
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vd + uv_offset * uvd_stride + uv_offset,
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yd_stride, uvd_stride);
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break;
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default:
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assert(0);
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}
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}
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void vp9_mfqe(VP9_COMMON *cm) {
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int mi_row, mi_col;
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// Current decoded frame.
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const YV12_BUFFER_CONFIG *show = cm->frame_to_show;
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// Last decoded frame and will store the MFQE result.
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YV12_BUFFER_CONFIG *dest = &cm->post_proc_buffer;
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// Loop through each super block.
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for (mi_row = 0; mi_row < cm->mi_rows; mi_row += MI_BLOCK_SIZE) {
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for (mi_col = 0; mi_col < cm->mi_cols; mi_col += MI_BLOCK_SIZE) {
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MODE_INFO *mi;
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MODE_INFO *mi_local = cm->mi + (mi_row * cm->mi_stride + mi_col);
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// Motion Info in last frame.
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MODE_INFO *mi_prev = cm->postproc_state.prev_mi +
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(mi_row * cm->mi_stride + mi_col);
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const uint32_t y_stride = show->y_stride;
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const uint32_t uv_stride = show->uv_stride;
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const uint32_t yd_stride = dest->y_stride;
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const uint32_t uvd_stride = dest->uv_stride;
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const uint32_t row_offset_y = mi_row << 3;
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const uint32_t row_offset_uv = mi_row << 2;
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const uint32_t col_offset_y = mi_col << 3;
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const uint32_t col_offset_uv = mi_col << 2;
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const uint8_t *y = show->y_buffer + row_offset_y * y_stride +
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col_offset_y;
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const uint8_t *u = show->u_buffer + row_offset_uv * uv_stride +
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col_offset_uv;
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const uint8_t *v = show->v_buffer + row_offset_uv * uv_stride +
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col_offset_uv;
|
|
uint8_t *yd = dest->y_buffer + row_offset_y * yd_stride + col_offset_y;
|
|
uint8_t *ud = dest->u_buffer + row_offset_uv * uvd_stride +
|
|
col_offset_uv;
|
|
uint8_t *vd = dest->v_buffer + row_offset_uv * uvd_stride +
|
|
col_offset_uv;
|
|
if (frame_is_intra_only(cm)) {
|
|
mi = mi_prev;
|
|
} else {
|
|
mi = mi_local;
|
|
}
|
|
mfqe_partition(cm, mi, BLOCK_64X64, y, u, v, y_stride, uv_stride, yd, ud,
|
|
vd, yd_stride, uvd_stride);
|
|
}
|
|
}
|
|
}
|