349 lines
16 KiB
C
349 lines
16 KiB
C
/*
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* Copyright (c) 2016 Paul B Mahol
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/mem.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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typedef struct AverageBlurContext {
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const AVClass *class;
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int radius;
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int radiusV;
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int planes;
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int depth;
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int max;
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int area;
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int planewidth[4];
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int planeheight[4];
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void *buffer;
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uint16_t lut[256 * 256 * 256];
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int nb_planes;
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int (*filter[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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} AverageBlurContext;
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#define OFFSET(x) offsetof(AverageBlurContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption avgblur_options[] = {
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{ "sizeX", "set horizontal size", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=1}, 1, 1024, FLAGS },
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{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
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{ "sizeY", "set vertical size", OFFSET(radiusV), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(avgblur);
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typedef struct ThreadData {
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int height;
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int width;
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const void *ptr;
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void *dptr;
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int linesize, dlinesize;
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} ThreadData;
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#define LUT_DIV(sum, area) (lut[(sum)])
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#define SLOW_DIV(sum, area) ((sum) / (area))
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#define FILTER(name, type, btype, lutunused, areaunused, lutdiv) \
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static int filter_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
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{ \
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AverageBlurContext *s = ctx->priv; \
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ThreadData *td = arg; \
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areaunused const int area = s->area; \
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lutunused const uint16_t *lut = s->lut; \
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const int size_w = s->radius; \
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const int size_h = s->radiusV; \
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btype *col_sum = (btype *)s->buffer + size_w; \
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const int dlinesize = td->dlinesize / sizeof(type); \
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const int linesize = td->linesize / sizeof(type); \
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const int height = td->height; \
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const int width = td->width; \
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const type *src = td->ptr; \
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type *dst = td->dptr; \
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btype sum = 0; \
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\
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for (int x = -size_w; x < 0; x++) { \
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sum = src[0] * size_h; \
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for (int y = 0; y <= size_h; y++) \
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sum += src[y * linesize]; \
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av_assert2(sum >= 0); \
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col_sum[x] = sum; \
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} \
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\
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for (int x = 0; x < width; x++) { \
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sum = src[x] * size_h; \
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for (int y = 0; y <= size_h; y++) \
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sum += src[x + y * linesize]; \
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av_assert2(sum >= 0); \
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col_sum[x] = sum; \
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} \
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\
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for (int x = width; x < width + size_w; x++) { \
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sum = src[width - 1] * size_h; \
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for (int y = 0; y <= size_h; y++) \
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sum += src[width - 1 + y * linesize]; \
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av_assert2(sum >= 0); \
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col_sum[x] = sum; \
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} \
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\
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sum = 0; \
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for (int x = -size_w; x <= size_w; x++) \
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sum += col_sum[x]; \
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av_assert2(sum >= 0); \
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dst[0] = lutdiv(sum, area); \
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\
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for (int x = 1; x < width; x++) { \
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sum = sum - col_sum[x - size_w - 1] + col_sum[x + size_w]; \
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av_assert2(sum >= 0); \
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dst[x] = lutdiv(sum, area); \
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} \
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\
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src = td->ptr; \
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src += linesize; \
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dst += dlinesize; \
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\
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for (int y = 1; y < height; y++) { \
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const int syp = FFMIN(size_h, height - y - 1) * linesize; \
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const int syn = FFMIN(y, size_h + 1) * linesize; \
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\
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sum = 0; \
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\
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for (int x = -size_w; x < 0; x++) \
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col_sum[x] += src[0 + syp] - src[0 - syn]; \
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\
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for (int x = 0; x < width; x++) \
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col_sum[x] += src[x + syp] - src[x - syn]; \
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\
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for (int x = width; x < width + size_w; x++) \
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col_sum[x] += src[width - 1 + syp] - src[width - 1 - syn]; \
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\
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for (int x = -size_w; x <= size_w; x++) \
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sum += col_sum[x]; \
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av_assert2(sum >= 0); \
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dst[0] = lutdiv(sum, area); \
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\
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for (int x = 1; x < width; x++) { \
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sum = sum - col_sum[x - size_w - 1] + col_sum[x + size_w]; \
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av_assert2(sum >= 0); \
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dst[x] = lutdiv(sum, area); \
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} \
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\
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src += linesize; \
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dst += dlinesize; \
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} \
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\
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return 0; \
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}
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FILTER(lut8, uint8_t, int32_t, , av_unused, LUT_DIV)
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FILTER(lut16, uint16_t, int64_t, , av_unused, LUT_DIV)
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FILTER(slow8, uint8_t, int32_t, av_unused, , SLOW_DIV)
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FILTER(slow16, uint16_t, int64_t, av_unused, , SLOW_DIV)
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static void build_lut(AVFilterContext *ctx, int max)
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{
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AverageBlurContext *s = ctx->priv;
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const int area = (2 * s->radiusV + 1) * (2 * s->radius + 1);
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s->area = area;
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if (max * area >= FF_ARRAY_ELEMS(s->lut))
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return;
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for (int i = 0, j = 0, k = 0; i < max * area; i++, j++) {
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if (j == area) {
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k++;
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j = 0;
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}
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s->lut[i] = k;
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}
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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AverageBlurContext *s = ctx->priv;
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av_freep(&s->buffer);
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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AverageBlurContext *s = ctx->priv;
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uninit(ctx);
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s->depth = desc->comp[0].depth;
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s->max = 1 << s->depth;
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
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s->planewidth[0] = s->planewidth[3] = inlink->w;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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s->buffer = av_calloc(inlink->w + (1024 * 2 + 1), 4 * ((s->depth + 7) / 8));
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if (!s->buffer)
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return AVERROR(ENOMEM);
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if (s->radiusV <= 0)
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s->radiusV = s->radius;
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s->filter[0] = s->depth <= 8 ? filter_lut8 : filter_lut16;
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s->filter[1] = s->depth <= 8 ? filter_slow8 : filter_slow16;
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s->radius = FFMIN(s->planewidth[1] / 2, s->radius);
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s->radiusV = FFMIN(s->planeheight[1] / 2, s->radiusV);
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build_lut(ctx, s->max);
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return 0;
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}
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static void averageiir2d(AVFilterContext *ctx, AVFrame *in, AVFrame *out, int plane)
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{
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AverageBlurContext *s = ctx->priv;
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const int width = s->planewidth[plane];
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const int height = s->planeheight[plane];
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const int slow = (s->max * s->area) >= FF_ARRAY_ELEMS(s->lut);
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ThreadData td;
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td.width = width;
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td.height = height;
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td.ptr = in->data[plane];
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td.linesize = in->linesize[plane];
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td.dptr = out->data[plane];
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td.dlinesize = out->linesize[plane];
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s->filter[slow](ctx, &td, 0, 0);
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}
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AverageBlurContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out;
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int plane;
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, in);
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for (plane = 0; plane < s->nb_planes; plane++) {
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const int height = s->planeheight[plane];
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const int width = s->planewidth[plane];
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if (!(s->planes & (1 << plane))) {
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if (out != in)
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av_image_copy_plane(out->data[plane], out->linesize[plane],
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in->data[plane], in->linesize[plane],
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width * ((s->depth + 7) / 8), height);
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continue;
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}
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averageiir2d(ctx, in, out, plane);
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}
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
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char *res, int res_len, int flags)
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{
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AverageBlurContext *s = ctx->priv;
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const int area = s->area;
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int ret;
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ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
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if (ret < 0)
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return ret;
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if (s->radiusV <= 0)
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s->radiusV = s->radius;
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s->radius = FFMIN(s->planewidth[1] / 2, s->radius);
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s->radiusV = FFMIN(s->planeheight[1] / 2, s->radiusV);
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if (area != (2 * s->radiusV + 1) * (2 * s->radius + 1))
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build_lut(ctx, s->max);
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return 0;
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}
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static const AVFilterPad avgblur_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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.filter_frame = filter_frame,
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},
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};
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const AVFilter ff_vf_avgblur = {
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.name = "avgblur",
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.description = NULL_IF_CONFIG_SMALL("Apply Average Blur filter."),
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.priv_size = sizeof(AverageBlurContext),
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.priv_class = &avgblur_class,
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.uninit = uninit,
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FILTER_INPUTS(avgblur_inputs),
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FILTER_OUTPUTS(ff_video_default_filterpad),
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FILTER_PIXFMTS_ARRAY(pix_fmts),
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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.process_command = process_command,
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};
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