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60cb39da86
vpx/vp8/common/reconinter.c
Ronald S. Bultje 60cb39da86 Dual 16x16 inter prediction. 
This patch introduces the concept of dual inter16x16 prediction. A
16x16 inter-predicted macroblock can use 2 references instead of 1,
where both references use the same mvmode (new, near/est, zero). In the
case of newmv, this means that two MVs are coded instead of one. The
frame can be encoded in 3 ways: all MBs single-prediction, all MBs dual
prediction, or per-MB single/dual prediction selection ("hybrid"), in
which case a single bit is coded per-MB to indicate whether the MB uses
single or dual inter prediction.

In the future, we can (maybe?) get further gains by mixing this with
Adrian's 32x32 work, per-segment dual prediction settings, or adding
support for dual splitmv/8x8mv inter prediction.

Gain (on derf-set, CQ mode) is ~2.8% (SSIM) or ~3.6% (glb PSNR). Most
gain is at medium/high bitrates, but there's minor gains at low bitrates
also. Output was confirmed to match between encoder and decoder.

Note for optimization people: this patch introduces a 2nd version of
16x16/8x8 sixtap/bilin functions, which does an avg instead of a
store. They may want to look and make sure this is implemented to
their satisfaction so we can optimize it best in the future.

Change-ID: I59dc84b07cbb3ccf073ac0f756d03d294cb19281
2011-12-06 11:53:02 -08:00

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/*
* Copyright (c) 2010 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 "vpx_ports/config.h"
#include "vpx/vpx_integer.h"
#include "recon.h"
#include "subpixel.h"
#include "blockd.h"
#include "reconinter.h"
#if CONFIG_RUNTIME_CPU_DETECT
#include "onyxc_int.h"
#endif
void vp8_copy_mem16x16_c(
unsigned char *src,
int src_stride,
unsigned char *dst,
int dst_stride)
{
int r;
for (r = 0; r < 16; r++)
{
#if !(CONFIG_FAST_UNALIGNED)
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
dst[4] = src[4];
dst[5] = src[5];
dst[6] = src[6];
dst[7] = src[7];
dst[8] = src[8];
dst[9] = src[9];
dst[10] = src[10];
dst[11] = src[11];
dst[12] = src[12];
dst[13] = src[13];
dst[14] = src[14];
dst[15] = src[15];
#else
((uint32_t *)dst)[0] = ((uint32_t *)src)[0] ;
((uint32_t *)dst)[1] = ((uint32_t *)src)[1] ;
((uint32_t *)dst)[2] = ((uint32_t *)src)[2] ;
((uint32_t *)dst)[3] = ((uint32_t *)src)[3] ;
#endif
src += src_stride;
dst += dst_stride;
}
}
#if CONFIG_DUALPRED
void vp8_avg_mem16x16_c(
unsigned char *src,
int src_stride,
unsigned char *dst,
int dst_stride)
{
int r;
for (r = 0; r < 16; r++)
{
int n;
for (n = 0; n < 16; n++)
{
dst[n] = (dst[n] + src[n] + 1) >> 1;
}
src += src_stride;
dst += dst_stride;
}
}
#endif /* CONFIG_DUALPRED */
void vp8_copy_mem8x8_c(
unsigned char *src,
int src_stride,
unsigned char *dst,
int dst_stride)
{
int r;
for (r = 0; r < 8; r++)
{
#if !(CONFIG_FAST_UNALIGNED)
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
dst[4] = src[4];
dst[5] = src[5];
dst[6] = src[6];
dst[7] = src[7];
#else
((uint32_t *)dst)[0] = ((uint32_t *)src)[0] ;
((uint32_t *)dst)[1] = ((uint32_t *)src)[1] ;
#endif
src += src_stride;
dst += dst_stride;
}
}
#if CONFIG_DUALPRED
void vp8_avg_mem8x8_c(
unsigned char *src,
int src_stride,
unsigned char *dst,
int dst_stride)
{
int r;
for (r = 0; r < 8; r++)
{
int n;
for (n = 0; n < 8; n++)
{
dst[n] = (dst[n] + src[n] + 1) >> 1;
}
src += src_stride;
dst += dst_stride;
}
}
#endif /* CONFIG_DUALPRED */
void vp8_copy_mem8x4_c(
unsigned char *src,
int src_stride,
unsigned char *dst,
int dst_stride)
{
int r;
for (r = 0; r < 4; r++)
{
#if !(CONFIG_FAST_UNALIGNED)
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
dst[4] = src[4];
dst[5] = src[5];
dst[6] = src[6];
dst[7] = src[7];
#else
((uint32_t *)dst)[0] = ((uint32_t *)src)[0] ;
((uint32_t *)dst)[1] = ((uint32_t *)src)[1] ;
#endif
src += src_stride;
dst += dst_stride;
}
}
void vp8_build_inter_predictors_b(BLOCKD *d, int pitch, vp8_subpix_fn_t sppf)
{
int r;
unsigned char *ptr_base;
unsigned char *ptr;
unsigned char *pred_ptr = d->predictor;
ptr_base = *(d->base_pre);
if (d->bmi.mv.as_mv.row & 7 || d->bmi.mv.as_mv.col & 7)
{
ptr = ptr_base + d->pre + (d->bmi.mv.as_mv.row >> 3) * d->pre_stride + (d->bmi.mv.as_mv.col >> 3);
sppf(ptr, d->pre_stride, d->bmi.mv.as_mv.col & 7, d->bmi.mv.as_mv.row & 7, pred_ptr, pitch);
}
else
{
ptr_base += d->pre + (d->bmi.mv.as_mv.row >> 3) * d->pre_stride + (d->bmi.mv.as_mv.col >> 3);
ptr = ptr_base;
for (r = 0; r < 4; r++)
{
#if !(CONFIG_FAST_UNALIGNED)
pred_ptr[0] = ptr[0];
pred_ptr[1] = ptr[1];
pred_ptr[2] = ptr[2];
pred_ptr[3] = ptr[3];
#else
*(uint32_t *)pred_ptr = *(uint32_t *)ptr ;
#endif
pred_ptr += pitch;
ptr += d->pre_stride;
}
}
}
static void build_inter_predictors4b(MACROBLOCKD *x, BLOCKD *d, int pitch)
{
unsigned char *ptr_base;
unsigned char *ptr;
unsigned char *pred_ptr = d->predictor;
ptr_base = *(d->base_pre);
ptr = ptr_base + d->pre + (d->bmi.mv.as_mv.row >> 3) * d->pre_stride + (d->bmi.mv.as_mv.col >> 3);
if (d->bmi.mv.as_mv.row & 7 || d->bmi.mv.as_mv.col & 7)
{
x->subpixel_predict8x8(ptr, d->pre_stride, d->bmi.mv.as_mv.col & 7, d->bmi.mv.as_mv.row & 7, pred_ptr, pitch);
}
else
{
RECON_INVOKE(&x->rtcd->recon, copy8x8)(ptr, d->pre_stride, pred_ptr, pitch);
}
}
static void build_inter_predictors2b(MACROBLOCKD *x, BLOCKD *d, int pitch)
{
unsigned char *ptr_base;
unsigned char *ptr;
unsigned char *pred_ptr = d->predictor;
ptr_base = *(d->base_pre);
ptr = ptr_base + d->pre + (d->bmi.mv.as_mv.row >> 3) * d->pre_stride + (d->bmi.mv.as_mv.col >> 3);
if (d->bmi.mv.as_mv.row & 7 || d->bmi.mv.as_mv.col & 7)
{
x->subpixel_predict8x4(ptr, d->pre_stride, d->bmi.mv.as_mv.col & 7, d->bmi.mv.as_mv.row & 7, pred_ptr, pitch);
}
else
{
RECON_INVOKE(&x->rtcd->recon, copy8x4)(ptr, d->pre_stride, pred_ptr, pitch);
}
}
/*encoder only*/
void vp8_build_inter16x16_predictors_mbuv(MACROBLOCKD *x)
{
unsigned char *uptr, *vptr;
unsigned char *upred_ptr = &x->predictor[256];
unsigned char *vpred_ptr = &x->predictor[320];
int mv_row = x->mode_info_context->mbmi.mv.as_mv.row;
int mv_col = x->mode_info_context->mbmi.mv.as_mv.col;
int offset;
int pre_stride = x->block[16].pre_stride;
/* calc uv motion vectors */
if (mv_row < 0)
mv_row -= 1;
else
mv_row += 1;
if (mv_col < 0)
mv_col -= 1;
else
mv_col += 1;
mv_row /= 2;
mv_col /= 2;
mv_row &= x->fullpixel_mask;
mv_col &= x->fullpixel_mask;
offset = (mv_row >> 3) * pre_stride + (mv_col >> 3);
uptr = x->pre.u_buffer + offset;
vptr = x->pre.v_buffer + offset;
if ((mv_row | mv_col) & 7)
{
x->subpixel_predict8x8(uptr, pre_stride, mv_col & 7, mv_row & 7, upred_ptr, 8);
x->subpixel_predict8x8(vptr, pre_stride, mv_col & 7, mv_row & 7, vpred_ptr, 8);
}
else
{
RECON_INVOKE(&x->rtcd->recon, copy8x8)(uptr, pre_stride, upred_ptr, 8);
RECON_INVOKE(&x->rtcd->recon, copy8x8)(vptr, pre_stride, vpred_ptr, 8);
}
}
/*encoder only*/
void vp8_build_inter4x4_predictors_mbuv(MACROBLOCKD *x)
{
int i, j;
/* build uv mvs */
for (i = 0; i < 2; i++)
{
for (j = 0; j < 2; j++)
{
int yoffset = i * 8 + j * 2;
int uoffset = 16 + i * 2 + j;
int voffset = 20 + i * 2 + j;
int temp;
temp = x->block[yoffset ].bmi.mv.as_mv.row
+ x->block[yoffset+1].bmi.mv.as_mv.row
+ x->block[yoffset+4].bmi.mv.as_mv.row
+ x->block[yoffset+5].bmi.mv.as_mv.row;
if (temp < 0) temp -= 4;
else temp += 4;
x->block[uoffset].bmi.mv.as_mv.row = (temp / 8) & x->fullpixel_mask;
temp = x->block[yoffset ].bmi.mv.as_mv.col
+ x->block[yoffset+1].bmi.mv.as_mv.col
+ x->block[yoffset+4].bmi.mv.as_mv.col
+ x->block[yoffset+5].bmi.mv.as_mv.col;
if (temp < 0) temp -= 4;
else temp += 4;
x->block[uoffset].bmi.mv.as_mv.col = (temp / 8) & x->fullpixel_mask;
x->block[voffset].bmi.mv.as_mv.row =
x->block[uoffset].bmi.mv.as_mv.row ;
x->block[voffset].bmi.mv.as_mv.col =
x->block[uoffset].bmi.mv.as_mv.col ;
}
}
for (i = 16; i < 24; i += 2)
{
BLOCKD *d0 = &x->block[i];
BLOCKD *d1 = &x->block[i+1];
if (d0->bmi.mv.as_int == d1->bmi.mv.as_int)
build_inter_predictors2b(x, d0, 8);
else
{
vp8_build_inter_predictors_b(d0, 8, x->subpixel_predict);
vp8_build_inter_predictors_b(d1, 8, x->subpixel_predict);
}
}
}
/*encoder only*/
void vp8_build_inter16x16_predictors_mby(MACROBLOCKD *x)
{
unsigned char *ptr_base;
unsigned char *ptr;
unsigned char *pred_ptr = x->predictor;
int mv_row = x->mode_info_context->mbmi.mv.as_mv.row;
int mv_col = x->mode_info_context->mbmi.mv.as_mv.col;
int pre_stride = x->block[0].pre_stride;
ptr_base = x->pre.y_buffer;
ptr = ptr_base + (mv_row >> 3) * pre_stride + (mv_col >> 3);
if ((mv_row | mv_col) & 7)
{
x->subpixel_predict16x16(ptr, pre_stride, mv_col & 7, mv_row & 7, pred_ptr, 16);
}
else
{
RECON_INVOKE(&x->rtcd->recon, copy16x16)(ptr, pre_stride, pred_ptr, 16);
}
}
void vp8_build_inter16x16_predictors_mb(MACROBLOCKD *x,
unsigned char *dst_y,
unsigned char *dst_u,
unsigned char *dst_v,
int dst_ystride,
int dst_uvstride)
{
int offset;
unsigned char *ptr;
unsigned char *uptr, *vptr;
int mv_row = x->mode_info_context->mbmi.mv.as_mv.row;
int mv_col = x->mode_info_context->mbmi.mv.as_mv.col;
unsigned char *ptr_base = x->pre.y_buffer;
int pre_stride = x->block[0].pre_stride;
ptr = ptr_base + (mv_row >> 3) * pre_stride + (mv_col >> 3);
if ((mv_row | mv_col) & 7)
{
x->subpixel_predict16x16(ptr, pre_stride, mv_col & 7, mv_row & 7, dst_y, dst_ystride);
}
else
{
RECON_INVOKE(&x->rtcd->recon, copy16x16)(ptr, pre_stride, dst_y, dst_ystride);
}
/* calc uv motion vectors */
if (mv_row < 0)
mv_row -= 1;
else
mv_row += 1;
if (mv_col < 0)
mv_col -= 1;
else
mv_col += 1;
mv_row /= 2;
mv_col /= 2;
mv_row &= x->fullpixel_mask;
mv_col &= x->fullpixel_mask;
pre_stride >>= 1;
offset = (mv_row >> 3) * pre_stride + (mv_col >> 3);
uptr = x->pre.u_buffer + offset;
vptr = x->pre.v_buffer + offset;
if ((mv_row | mv_col) & 7)
{
x->subpixel_predict8x8(uptr, pre_stride, mv_col & 7, mv_row & 7, dst_u, dst_uvstride);
x->subpixel_predict8x8(vptr, pre_stride, mv_col & 7, mv_row & 7, dst_v, dst_uvstride);
}
else
{
RECON_INVOKE(&x->rtcd->recon, copy8x8)(uptr, pre_stride, dst_u, dst_uvstride);
RECON_INVOKE(&x->rtcd->recon, copy8x8)(vptr, pre_stride, dst_v, dst_uvstride);
}
}
#if CONFIG_DUALPRED
/*
* This function should be called after an initial call to
* vp8_build_inter16x16_predictors_mb() or _mby()/_mbuv().
* It will run a second sixtap filter on a (different) ref
* frame and average the result with the output of the
* first sixtap filter. The second reference frame is stored
* in x->second_pre (the reference frame index is in
* x->mode_info_context->mbmi.second_ref_frame). The second
* motion vector is x->mode_info_context->mbmi.second_mv.
*
* This allows blending prediction from two reference frames
* which sometimes leads to better prediction than from a
* single reference framer.
*/
void vp8_build_2nd_inter16x16_predictors_mb(MACROBLOCKD *x,
unsigned char *dst_y,
unsigned char *dst_u,
unsigned char *dst_v,
int dst_ystride,
int dst_uvstride)
{
int offset;
unsigned char *ptr;
unsigned char *uptr, *vptr;
int mv_row = x->mode_info_context->mbmi.second_mv.as_mv.row;
int mv_col = x->mode_info_context->mbmi.second_mv.as_mv.col;
unsigned char *ptr_base = x->second_pre.y_buffer;
int pre_stride = x->block[0].pre_stride;
ptr = ptr_base + (mv_row >> 3) * pre_stride + (mv_col >> 3);
if ((mv_row | mv_col) & 7)
{
x->subpixel_predict_avg16x16(ptr, pre_stride, mv_col & 7, mv_row & 7, dst_y, dst_ystride);
}
else
{
RECON_INVOKE(&x->rtcd->recon, avg16x16)(ptr, pre_stride, dst_y, dst_ystride);
}
/* calc uv motion vectors */
mv_row = (mv_row + (mv_row > 0)) >> 1;
mv_col = (mv_col + (mv_col > 0)) >> 1;
mv_row &= x->fullpixel_mask;
mv_col &= x->fullpixel_mask;
pre_stride >>= 1;
offset = (mv_row >> 3) * pre_stride + (mv_col >> 3);
uptr = x->second_pre.u_buffer + offset;
vptr = x->second_pre.v_buffer + offset;
if ((mv_row | mv_col) & 7)
{
x->subpixel_predict_avg8x8(uptr, pre_stride, mv_col & 7, mv_row & 7, dst_u, dst_uvstride);
x->subpixel_predict_avg8x8(vptr, pre_stride, mv_col & 7, mv_row & 7, dst_v, dst_uvstride);
}
else
{
RECON_INVOKE(&x->rtcd->recon, avg8x8)(uptr, pre_stride, dst_u, dst_uvstride);
RECON_INVOKE(&x->rtcd->recon, avg8x8)(vptr, pre_stride, dst_v, dst_uvstride);
}
}
#endif /* CONFIG_DUALPRED */
static void build_inter4x4_predictors_mb(MACROBLOCKD *x)
{
int i;
if (x->mode_info_context->mbmi.partitioning < 3)
{
x->block[ 0].bmi = x->mode_info_context->bmi[ 0];
x->block[ 2].bmi = x->mode_info_context->bmi[ 2];
x->block[ 8].bmi = x->mode_info_context->bmi[ 8];
x->block[10].bmi = x->mode_info_context->bmi[10];
build_inter_predictors4b(x, &x->block[ 0], 16);
build_inter_predictors4b(x, &x->block[ 2], 16);
build_inter_predictors4b(x, &x->block[ 8], 16);
build_inter_predictors4b(x, &x->block[10], 16);
}
else
{
for (i = 0; i < 16; i += 2)
{
BLOCKD *d0 = &x->block[i];
BLOCKD *d1 = &x->block[i+1];
x->block[i+0].bmi = x->mode_info_context->bmi[i+0];
x->block[i+1].bmi = x->mode_info_context->bmi[i+1];
if (d0->bmi.mv.as_int == d1->bmi.mv.as_int)
build_inter_predictors2b(x, d0, 16);
else
{
vp8_build_inter_predictors_b(d0, 16, x->subpixel_predict);
vp8_build_inter_predictors_b(d1, 16, x->subpixel_predict);
}
}
}
for (i = 16; i < 24; i += 2)
{
BLOCKD *d0 = &x->block[i];
BLOCKD *d1 = &x->block[i+1];
if (d0->bmi.mv.as_int == d1->bmi.mv.as_int)
build_inter_predictors2b(x, d0, 8);
else
{
vp8_build_inter_predictors_b(d0, 8, x->subpixel_predict);
vp8_build_inter_predictors_b(d1, 8, x->subpixel_predict);
}
}
}
static
void build_4x4uvmvs(MACROBLOCKD *x)
{
int i, j;
for (i = 0; i < 2; i++)
{
for (j = 0; j < 2; j++)
{
int yoffset = i * 8 + j * 2;
int uoffset = 16 + i * 2 + j;
int voffset = 20 + i * 2 + j;
int temp;
temp = x->mode_info_context->bmi[yoffset + 0].mv.as_mv.row
+ x->mode_info_context->bmi[yoffset + 1].mv.as_mv.row
+ x->mode_info_context->bmi[yoffset + 4].mv.as_mv.row
+ x->mode_info_context->bmi[yoffset + 5].mv.as_mv.row;
if (temp < 0) temp -= 4;
else temp += 4;
x->block[uoffset].bmi.mv.as_mv.row = (temp / 8) & x->fullpixel_mask;
temp = x->mode_info_context->bmi[yoffset + 0].mv.as_mv.col
+ x->mode_info_context->bmi[yoffset + 1].mv.as_mv.col
+ x->mode_info_context->bmi[yoffset + 4].mv.as_mv.col
+ x->mode_info_context->bmi[yoffset + 5].mv.as_mv.col;
if (temp < 0) temp -= 4;
else temp += 4;
x->block[uoffset].bmi.mv.as_mv.col = (temp / 8) & x->fullpixel_mask;
x->block[voffset].bmi.mv.as_mv.row =
x->block[uoffset].bmi.mv.as_mv.row ;
x->block[voffset].bmi.mv.as_mv.col =
x->block[uoffset].bmi.mv.as_mv.col ;
}
}
}
void vp8_build_inter_predictors_mb(MACROBLOCKD *x)
{
if (x->mode_info_context->mbmi.mode != SPLITMV)
{
vp8_build_inter16x16_predictors_mb(x, x->predictor, &x->predictor[256],
&x->predictor[320], 16, 8);
#if CONFIG_DUALPRED
if (x->mode_info_context->mbmi.second_ref_frame)
{
/* 256 = offset of U plane in Y+U+V buffer;
* 320 = offset of V plane in Y+U+V buffer.
* (256=16x16, 320=16x16+8x8). */
vp8_build_2nd_inter16x16_predictors_mb(x, x->predictor,
&x->predictor[256],
&x->predictor[320], 16, 8);
}
#endif /* CONFIG_DUALPRED */
}
else
{
build_4x4uvmvs(x);
build_inter4x4_predictors_mb(x);
}
}
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