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