7186a2dd86
It in essence refactors the code for both the interpolation filtering and the convolution. This change includes the moving of all the files as well as the changing of the code from vp9_ prefix to vpx_ prefix accordingly, for underneath architectures: (1) x86; (2) arm/neon; and (3) mips/msa. The work on mips/drsp2 will be done in a separate change list. Change-Id: Ic3ce7fb7f81210db7628b373c73553db68793c46
83 lines
3.3 KiB
C
83 lines
3.3 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 "./vpx_dsp_rtcd.h"
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#include "vpx_dsp/vpx_dsp_common.h"
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#include "vpx_ports/mem.h"
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void vpx_convolve8_neon(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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/* Given our constraints: w <= 64, h <= 64, taps == 8 we can reduce the
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* maximum buffer size to 64 * 64 + 7 (+ 1 to make it divisible by 4).
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*/
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DECLARE_ALIGNED(8, uint8_t, temp[64 * 72]);
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// Account for the vertical phase needing 3 lines prior and 4 lines post
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int intermediate_height = h + 7;
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if (x_step_q4 != 16 || y_step_q4 != 16) {
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vpx_convolve8_c(src, src_stride,
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dst, dst_stride,
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filter_x, x_step_q4,
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filter_y, y_step_q4,
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w, h);
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return;
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}
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/* Filter starting 3 lines back. The neon implementation will ignore the
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* given height and filter a multiple of 4 lines. Since this goes in to
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* the temp buffer which has lots of extra room and is subsequently discarded
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* this is safe if somewhat less than ideal.
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*/
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vpx_convolve8_horiz_neon(src - src_stride * 3, src_stride,
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temp, 64,
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filter_x, x_step_q4, filter_y, y_step_q4,
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w, intermediate_height);
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/* Step into the temp buffer 3 lines to get the actual frame data */
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vpx_convolve8_vert_neon(temp + 64 * 3, 64,
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dst, dst_stride,
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filter_x, x_step_q4, filter_y, y_step_q4,
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w, h);
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}
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void vpx_convolve8_avg_neon(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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DECLARE_ALIGNED(8, uint8_t, temp[64 * 72]);
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int intermediate_height = h + 7;
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if (x_step_q4 != 16 || y_step_q4 != 16) {
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vpx_convolve8_avg_c(src, src_stride,
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dst, dst_stride,
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filter_x, x_step_q4,
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filter_y, y_step_q4,
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w, h);
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return;
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}
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/* This implementation has the same issues as above. In addition, we only want
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* to average the values after both passes.
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*/
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vpx_convolve8_horiz_neon(src - src_stride * 3, src_stride,
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temp, 64,
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filter_x, x_step_q4, filter_y, y_step_q4,
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w, intermediate_height);
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vpx_convolve8_avg_vert_neon(temp + 64 * 3,
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64, dst, dst_stride,
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filter_x, x_step_q4, filter_y, y_step_q4,
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w, h);
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}
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