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