ref: ca9a262b1d7272a32da60273dbc607d0f54e0262
dir: libvpx/vp9/encoder/vp9_extend.c
/*
* 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_dsp/vpx_dsp_common.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
#include "vp9/common/vp9_common.h"
#include "vp9/encoder/vp9_extend.h"
static void copy_and_extend_plane(const uint8_t *src, int src_pitch,
uint8_t *dst, int dst_pitch, int w, int h,
int extend_top, int extend_left,
int extend_bottom, int extend_right,
int interleave_step) {
int i, j, linesize;
const int step = interleave_step < 1 ? 1 : interleave_step;
// copy the left and right most columns out
const uint8_t *src_ptr1 = src;
const uint8_t *src_ptr2 = src + (w - 1) * step;
uint8_t *dst_ptr1 = dst - extend_left;
uint8_t *dst_ptr2 = dst + w;
for (i = 0; i < h; i++) {
memset(dst_ptr1, src_ptr1[0], extend_left);
if (step == 1) {
memcpy(dst_ptr1 + extend_left, src_ptr1, w);
} else {
for (j = 0; j < w; j++) {
dst_ptr1[extend_left + j] = src_ptr1[step * j];
}
}
memset(dst_ptr2, src_ptr2[0], extend_right);
src_ptr1 += src_pitch;
src_ptr2 += src_pitch;
dst_ptr1 += dst_pitch;
dst_ptr2 += dst_pitch;
}
// Now copy the top and bottom lines into each line of the respective
// borders
src_ptr1 = dst - extend_left;
src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
dst_ptr2 = dst + dst_pitch * (h)-extend_left;
linesize = extend_left + extend_right + w;
for (i = 0; i < extend_top; i++) {
memcpy(dst_ptr1, src_ptr1, linesize);
dst_ptr1 += dst_pitch;
}
for (i = 0; i < extend_bottom; i++) {
memcpy(dst_ptr2, src_ptr2, linesize);
dst_ptr2 += dst_pitch;
}
}
#if CONFIG_VP9_HIGHBITDEPTH
static void highbd_copy_and_extend_plane(const uint8_t *src8, int src_pitch,
uint8_t *dst8, int dst_pitch, int w,
int h, int extend_top, int extend_left,
int extend_bottom, int extend_right) {
int i, linesize;
uint16_t *src = CONVERT_TO_SHORTPTR(src8);
uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
// copy the left and right most columns out
const uint16_t *src_ptr1 = src;
const uint16_t *src_ptr2 = src + w - 1;
uint16_t *dst_ptr1 = dst - extend_left;
uint16_t *dst_ptr2 = dst + w;
for (i = 0; i < h; i++) {
vpx_memset16(dst_ptr1, src_ptr1[0], extend_left);
memcpy(dst_ptr1 + extend_left, src_ptr1, w * sizeof(src_ptr1[0]));
vpx_memset16(dst_ptr2, src_ptr2[0], extend_right);
src_ptr1 += src_pitch;
src_ptr2 += src_pitch;
dst_ptr1 += dst_pitch;
dst_ptr2 += dst_pitch;
}
// Now copy the top and bottom lines into each line of the respective
// borders
src_ptr1 = dst - extend_left;
src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
dst_ptr2 = dst + dst_pitch * (h)-extend_left;
linesize = extend_left + extend_right + w;
for (i = 0; i < extend_top; i++) {
memcpy(dst_ptr1, src_ptr1, linesize * sizeof(src_ptr1[0]));
dst_ptr1 += dst_pitch;
}
for (i = 0; i < extend_bottom; i++) {
memcpy(dst_ptr2, src_ptr2, linesize * sizeof(src_ptr2[0]));
dst_ptr2 += dst_pitch;
}
}
#endif // CONFIG_VP9_HIGHBITDEPTH
void vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG *src,
YV12_BUFFER_CONFIG *dst) {
// Extend src frame in buffer
// Altref filtering assumes 16 pixel extension
const int et_y = 16;
const int el_y = 16;
// Motion estimation may use src block variance with the block size up
// to 64x64, so the right and bottom need to be extended to 64 multiple
// or up to 16, whichever is greater.
const int er_y =
VPXMAX(src->y_width + 16, ALIGN_POWER_OF_TWO(src->y_width, 6)) -
src->y_crop_width;
const int eb_y =
VPXMAX(src->y_height + 16, ALIGN_POWER_OF_TWO(src->y_height, 6)) -
src->y_crop_height;
const int uv_width_subsampling = (src->uv_width != src->y_width);
const int uv_height_subsampling = (src->uv_height != src->y_height);
const int et_uv = et_y >> uv_height_subsampling;
const int el_uv = el_y >> uv_width_subsampling;
const int eb_uv = eb_y >> uv_height_subsampling;
const int er_uv = er_y >> uv_width_subsampling;
// detect nv12 colorspace
const int chroma_step = src->v_buffer - src->u_buffer == 1 ? 2 : 1;
#if CONFIG_VP9_HIGHBITDEPTH
if (src->flags & YV12_FLAG_HIGHBITDEPTH) {
highbd_copy_and_extend_plane(src->y_buffer, src->y_stride, dst->y_buffer,
dst->y_stride, src->y_crop_width,
src->y_crop_height, et_y, el_y, eb_y, er_y);
highbd_copy_and_extend_plane(
src->u_buffer, src->uv_stride, dst->u_buffer, dst->uv_stride,
src->uv_crop_width, src->uv_crop_height, et_uv, el_uv, eb_uv, er_uv);
highbd_copy_and_extend_plane(
src->v_buffer, src->uv_stride, dst->v_buffer, dst->uv_stride,
src->uv_crop_width, src->uv_crop_height, et_uv, el_uv, eb_uv, er_uv);
return;
}
#endif // CONFIG_VP9_HIGHBITDEPTH
copy_and_extend_plane(src->y_buffer, src->y_stride, dst->y_buffer,
dst->y_stride, src->y_crop_width, src->y_crop_height,
et_y, el_y, eb_y, er_y, 1);
copy_and_extend_plane(src->u_buffer, src->uv_stride, dst->u_buffer,
dst->uv_stride, src->uv_crop_width, src->uv_crop_height,
et_uv, el_uv, eb_uv, er_uv, chroma_step);
copy_and_extend_plane(src->v_buffer, src->uv_stride, dst->v_buffer,
dst->uv_stride, src->uv_crop_width, src->uv_crop_height,
et_uv, el_uv, eb_uv, er_uv, chroma_step);
}
void vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG *src,
YV12_BUFFER_CONFIG *dst, int srcy,
int srcx, int srch, int srcw) {
// If the side is not touching the bounder then don't extend.
const int et_y = srcy ? 0 : dst->border;
const int el_y = srcx ? 0 : dst->border;
const int eb_y = srcy + srch != src->y_height
? 0
: dst->border + dst->y_height - src->y_height;
const int er_y = srcx + srcw != src->y_width
? 0
: dst->border + dst->y_width - src->y_width;
const int src_y_offset = srcy * src->y_stride + srcx;
const int dst_y_offset = srcy * dst->y_stride + srcx;
const int et_uv = ROUND_POWER_OF_TWO(et_y, 1);
const int el_uv = ROUND_POWER_OF_TWO(el_y, 1);
const int eb_uv = ROUND_POWER_OF_TWO(eb_y, 1);
const int er_uv = ROUND_POWER_OF_TWO(er_y, 1);
const int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
const int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
const int srch_uv = ROUND_POWER_OF_TWO(srch, 1);
const int srcw_uv = ROUND_POWER_OF_TWO(srcw, 1);
// detect nv12 colorspace
const int chroma_step = src->v_buffer - src->u_buffer == 1 ? 2 : 1;
copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride,
dst->y_buffer + dst_y_offset, dst->y_stride, srcw, srch,
et_y, el_y, eb_y, er_y, 1);
copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride,
dst->u_buffer + dst_uv_offset, dst->uv_stride, srcw_uv,
srch_uv, et_uv, el_uv, eb_uv, er_uv, chroma_step);
copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride,
dst->v_buffer + dst_uv_offset, dst->uv_stride, srcw_uv,
srch_uv, et_uv, el_uv, eb_uv, er_uv, chroma_step);
}