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123 lines
4.4 KiB
123 lines
4.4 KiB
/* |
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* Copyright (c) 2011 Pascal Getreuer |
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* Copyright (c) 2016 Paul B Mahol |
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* |
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* Redistribution and use in source and binary forms, with or without modification, |
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* are permitted provided that the following conditions are met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* HOLDER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef AVFILTER_GBLUR_INIT_H |
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#define AVFILTER_GBLUR_INIT_H |
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#include "config.h" |
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#include "libavutil/attributes.h" |
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#include "libavutil/common.h" |
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#include "gblur.h" |
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static void postscale_c(float *buffer, int length, |
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float postscale, float min, float max) |
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{ |
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for (int i = 0; i < length; i++) { |
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buffer[i] *= postscale; |
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buffer[i] = av_clipf(buffer[i], min, max); |
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} |
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} |
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static void horiz_slice_c(float *buffer, int width, int height, int steps, |
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float nu, float bscale, float *localbuf) |
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{ |
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int x; |
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for (int y = 0; y < height; y++) { |
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for (int step = 0; step < steps; step++) { |
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float *ptr = buffer + width * y; |
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ptr[0] *= bscale; |
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/* Filter rightwards */ |
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for (x = 1; x < width; x++) |
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ptr[x] += nu * ptr[x - 1]; |
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ptr[x = width - 1] *= bscale; |
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/* Filter leftwards */ |
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for (; x > 0; x--) |
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ptr[x - 1] += nu * ptr[x]; |
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} |
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} |
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} |
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static void do_vertical_columns(float *buffer, int width, int height, |
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int column_begin, int column_end, int steps, |
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float nu, float boundaryscale, int column_step) |
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{ |
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const int numpixels = width * height; |
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int i; |
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for (int x = column_begin; x < column_end;) { |
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for (int step = 0; step < steps; step++) { |
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float *ptr = buffer + x; |
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for (int k = 0; k < column_step; k++) { |
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ptr[k] *= boundaryscale; |
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} |
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/* Filter downwards */ |
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for (i = width; i < numpixels; i += width) { |
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for (int k = 0; k < column_step; k++) { |
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ptr[i + k] += nu * ptr[i - width + k]; |
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} |
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} |
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i = numpixels - width; |
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for (int k = 0; k < column_step; k++) |
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ptr[i + k] *= boundaryscale; |
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/* Filter upwards */ |
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for (; i > 0; i -= width) { |
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for (int k = 0; k < column_step; k++) |
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ptr[i - width + k] += nu * ptr[i + k]; |
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} |
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} |
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x += column_step; |
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} |
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} |
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static void verti_slice_c(float *buffer, int width, int height, |
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int slice_start, int slice_end, int steps, |
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float nu, float boundaryscale) |
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{ |
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int aligned_end = slice_start + (((slice_end - slice_start) >> 3) << 3); |
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/* Filter vertically along columns (process 8 columns in each step) */ |
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do_vertical_columns(buffer, width, height, slice_start, aligned_end, |
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steps, nu, boundaryscale, 8); |
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/* Filter un-aligned columns one by one */ |
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do_vertical_columns(buffer, width, height, aligned_end, slice_end, |
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steps, nu, boundaryscale, 1); |
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} |
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static av_unused void ff_gblur_init(GBlurContext *s) |
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{ |
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s->localbuf = NULL; |
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s->horiz_slice = horiz_slice_c; |
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s->verti_slice = verti_slice_c; |
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s->postscale_slice = postscale_c; |
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#if ARCH_X86 |
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ff_gblur_init_x86(s); |
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#endif |
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} |
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#endif /* AVFILTER_GBLUR_INIT_H */
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