305 lines
11 KiB
C
305 lines
11 KiB
C
/*
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* Copyright (c) 2013 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 "vp9/common/vp9_convolve.h"
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#include <assert.h>
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#include "./vpx_config.h"
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#include "./vp9_rtcd.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_filter.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_ports/mem.h"
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static void convolve_horiz_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x0, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h, int taps) {
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int x, y, k;
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/* NOTE: This assumes that the filter table is 256-byte aligned. */
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/* TODO(agrange) Modify to make independent of table alignment. */
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const int16_t *const filter_x_base =
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(const int16_t *)(((intptr_t)filter_x0) & ~(intptr_t)0xff);
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/* Adjust base pointer address for this source line */
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src -= taps / 2 - 1;
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for (y = 0; y < h; ++y) {
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/* Initial phase offset */
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int x_q4 = (filter_x0 - filter_x_base) / taps;
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for (x = 0; x < w; ++x) {
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/* Per-pixel src offset */
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const int src_x = x_q4 >> SUBPEL_BITS;
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int sum = 0;
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/* Pointer to filter to use */
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const int16_t *const filter_x = filter_x_base +
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(x_q4 & SUBPEL_MASK) * taps;
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for (k = 0; k < taps; ++k)
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sum += src[src_x + k] * filter_x[k];
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dst[x] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
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/* Move to the next source pixel */
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x_q4 += x_step_q4;
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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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static void convolve_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x0, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h, int taps) {
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int x, y, k;
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/* NOTE: This assumes that the filter table is 256-byte aligned. */
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/* TODO(agrange) Modify to make independent of table alignment. */
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const int16_t *const filter_x_base =
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(const int16_t *)(((intptr_t)filter_x0) & ~(intptr_t)0xff);
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/* Adjust base pointer address for this source line */
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src -= taps / 2 - 1;
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for (y = 0; y < h; ++y) {
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/* Initial phase offset */
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int x_q4 = (filter_x0 - filter_x_base) / taps;
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for (x = 0; x < w; ++x) {
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/* Per-pixel src offset */
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const int src_x = x_q4 >> SUBPEL_BITS;
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int sum = 0;
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/* Pointer to filter to use */
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const int16_t *const filter_x = filter_x_base +
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(x_q4 & SUBPEL_MASK) * taps;
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for (k = 0; k < taps; ++k)
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sum += src[src_x + k] * filter_x[k];
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dst[x] = ROUND_POWER_OF_TWO(dst[x] +
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clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), 1);
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/* Move to the next source pixel */
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x_q4 += x_step_q4;
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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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static void convolve_vert_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y0, int y_step_q4,
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int w, int h, int taps) {
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int x, y, k;
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/* NOTE: This assumes that the filter table is 256-byte aligned. */
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/* TODO(agrange) Modify to make independent of table alignment. */
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const int16_t *const filter_y_base =
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(const int16_t *)(((intptr_t)filter_y0) & ~(intptr_t)0xff);
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/* Adjust base pointer address for this source column */
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src -= src_stride * (taps / 2 - 1);
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for (x = 0; x < w; ++x) {
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/* Initial phase offset */
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int y_q4 = (filter_y0 - filter_y_base) / taps;
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for (y = 0; y < h; ++y) {
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/* Per-pixel src offset */
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const int src_y = y_q4 >> SUBPEL_BITS;
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int sum = 0;
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/* Pointer to filter to use */
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const int16_t *const filter_y = filter_y_base +
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(y_q4 & SUBPEL_MASK) * taps;
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for (k = 0; k < taps; ++k)
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sum += src[(src_y + k) * src_stride] * filter_y[k];
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dst[y * dst_stride] =
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clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
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/* Move to the next source pixel */
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y_q4 += y_step_q4;
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}
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++src;
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++dst;
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}
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}
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static void convolve_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y0, int y_step_q4,
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int w, int h, int taps) {
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int x, y, k;
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/* NOTE: This assumes that the filter table is 256-byte aligned. */
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/* TODO(agrange) Modify to make independent of table alignment. */
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const int16_t *const filter_y_base =
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(const int16_t *)(((intptr_t)filter_y0) & ~(intptr_t)0xff);
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/* Adjust base pointer address for this source column */
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src -= src_stride * (taps / 2 - 1);
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for (x = 0; x < w; ++x) {
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/* Initial phase offset */
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int y_q4 = (filter_y0 - filter_y_base) / taps;
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for (y = 0; y < h; ++y) {
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/* Per-pixel src offset */
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const int src_y = y_q4 >> SUBPEL_BITS;
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int sum = 0;
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/* Pointer to filter to use */
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const int16_t *const filter_y = filter_y_base +
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(y_q4 & SUBPEL_MASK) * taps;
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for (k = 0; k < taps; ++k)
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sum += src[(src_y + k) * src_stride] * filter_y[k];
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dst[y * dst_stride] = ROUND_POWER_OF_TWO(dst[y * dst_stride] +
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clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), 1);
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/* Move to the next source pixel */
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y_q4 += y_step_q4;
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}
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++src;
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++dst;
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}
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}
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static void convolve_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h, int taps) {
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/* Fixed size intermediate buffer places limits on parameters.
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* Maximum intermediate_height is 135, for y_step_q4 == 32,
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* h == 64, taps == 8.
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*/
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uint8_t temp[64 * 135];
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int intermediate_height = MAX(((h * y_step_q4) >> 4), 1) + taps - 1;
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assert(w <= 64);
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assert(h <= 64);
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assert(taps <= 8);
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assert(y_step_q4 <= 32);
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assert(x_step_q4 <= 32);
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if (intermediate_height < h)
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intermediate_height = h;
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convolve_horiz_c(src - src_stride * (taps / 2 - 1), src_stride, temp, 64,
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filter_x, x_step_q4, filter_y, y_step_q4, w,
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intermediate_height, taps);
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convolve_vert_c(temp + 64 * (taps / 2 - 1), 64, dst, dst_stride, filter_x,
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x_step_q4, filter_y, y_step_q4, w, h, taps);
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}
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void vp9_convolve8_horiz_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h) {
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convolve_horiz_c(src, src_stride, dst, dst_stride,
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filter_x, x_step_q4, filter_y, y_step_q4, w, h, 8);
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}
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void vp9_convolve8_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h) {
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convolve_avg_horiz_c(src, src_stride, dst, dst_stride,
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filter_x, x_step_q4, filter_y, y_step_q4, w, h, 8);
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}
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void vp9_convolve8_vert_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h) {
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convolve_vert_c(src, src_stride, dst, dst_stride,
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filter_x, x_step_q4, filter_y, y_step_q4, w, h, 8);
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}
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void vp9_convolve8_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h) {
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convolve_avg_vert_c(src, src_stride, dst, dst_stride,
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filter_x, x_step_q4, filter_y, y_step_q4, w, h, 8);
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}
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void vp9_convolve8_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h) {
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convolve_c(src, src_stride, dst, dst_stride,
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filter_x, x_step_q4, filter_y, y_step_q4, w, h, 8);
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}
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void vp9_convolve8_avg_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int x_step_q4,
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const int16_t *filter_y, int y_step_q4,
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int w, int h) {
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/* Fixed size intermediate buffer places limits on parameters. */
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DECLARE_ALIGNED_ARRAY(16, uint8_t, temp, 64 * 64);
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assert(w <= 64);
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assert(h <= 64);
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vp9_convolve8(src, src_stride, temp, 64,
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filter_x, x_step_q4, filter_y, y_step_q4, w, h);
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vp9_convolve_avg(temp, 64, dst, dst_stride, NULL, 0, NULL, 0, w, h);
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}
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void vp9_convolve_copy_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int filter_x_stride,
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const int16_t *filter_y, int filter_y_stride,
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int w, int h) {
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int r;
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for (r = h; r > 0; --r) {
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memcpy(dst, src, w);
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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_convolve_avg_c(const uint8_t *src, ptrdiff_t src_stride,
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uint8_t *dst, ptrdiff_t dst_stride,
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const int16_t *filter_x, int filter_x_stride,
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const int16_t *filter_y, int filter_y_stride,
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int w, int h) {
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int x, y;
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for (y = 0; y < h; ++y) {
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for (x = 0; x < w; ++x)
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dst[x] = ROUND_POWER_OF_TWO(dst[x] + src[x], 1);
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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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