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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/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 planewidth[4];
int planeheight[4];
float *buffer;
int nb_planes;
int (*filter_horizontally)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
int (*filter_vertically)(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
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;
uint8_t *ptr;
int linesize;
} ThreadData;
#define HORIZONTAL_FILTER(name, type) \
static int filter_horizontally_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)\
{ \
AverageBlurContext *s = ctx->priv; \
ThreadData *td = arg; \
const int height = td->height; \
const int width = td->width; \
const int slice_start = (height * jobnr ) / nb_jobs; \
const int slice_end = (height * (jobnr+1)) / nb_jobs; \
const int radius = FFMIN(s->radius, width / 2); \
const int linesize = td->linesize / sizeof(type); \
float *buffer = s->buffer; \
const type *src; \
float *ptr; \
int y, x; \
\
/* Filter horizontally along each row */ \
for (y = slice_start; y < slice_end; y++) { \
float acc = 0; \
int count = 0; \
\
src = (const type *)td->ptr + linesize * y; \
ptr = buffer + width * y; \
\
for (x = 0; x < radius; x++) { \
acc += src[x]; \
} \
count += radius; \
\
for (x = 0; x <= radius; x++) { \
acc += src[x + radius]; \
count++; \
ptr[x] = acc / count; \
} \
\
for (; x < width - radius; x++) { \
acc += src[x + radius] - src[x - radius - 1]; \
ptr[x] = acc / count; \
} \
\
for (; x < width; x++) { \
acc -= src[x - radius]; \
count--; \
ptr[x] = acc / count; \
} \
} \
\
return 0; \
}
HORIZONTAL_FILTER(8, uint8_t)
HORIZONTAL_FILTER(16, uint16_t)
#define VERTICAL_FILTER(name, type) \
static int filter_vertically_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
{ \
AverageBlurContext *s = ctx->priv; \
ThreadData *td = arg; \
const int height = td->height; \
const int width = td->width; \
const int slice_start = (width * jobnr ) / nb_jobs; \
const int slice_end = (width * (jobnr+1)) / nb_jobs; \
const int radius = FFMIN(s->radiusV, height / 2); \
const int linesize = td->linesize / sizeof(type); \
type *buffer = (type *)td->ptr; \
const float *src; \
type *ptr; \
int i, x; \
\
/* Filter vertically along each column */ \
for (x = slice_start; x < slice_end; x++) { \
float acc = 0; \
int count = 0; \
\
ptr = buffer + x; \
src = s->buffer + x; \
\
for (i = 0; i < radius; i++) { \
acc += src[0]; \
src += width; \
} \
count += radius; \
\
src = s->buffer + x; \
ptr = buffer + x; \
for (i = 0; i + radius < height && i <= radius; i++) { \
acc += src[(i + radius) * width]; \
count++; \
ptr[i * linesize] = acc / count; \
} \
\
for (; i < height - radius; i++) { \
acc += src[(i + radius) * width] - src[(i - radius - 1) * width]; \
ptr[i * linesize] = acc / count; \
} \
\
for (; i < height; i++) { \
acc -= src[(i - radius) * width]; \
count--; \
ptr[i * linesize] = acc / count; \
} \
} \
\
return 0; \
}
VERTICAL_FILTER(8, uint8_t)
VERTICAL_FILTER(16, uint16_t)
static int config_input(AVFilterLink *inlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
AverageBlurContext *s = inlink->dst->priv;
s->depth = desc->comp[0].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_malloc_array(inlink->w, inlink->h * sizeof(*s->buffer));
if (!s->buffer)
return AVERROR(ENOMEM);
if (s->radiusV <= 0) {
s->radiusV = s->radius;
}
if (s->depth == 8) {
s->filter_horizontally = filter_horizontally_8;
s->filter_vertically = filter_vertically_8;
} else {
s->filter_horizontally = filter_horizontally_16;
s->filter_vertically = filter_vertically_16;
}
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 nb_threads = ff_filter_get_nb_threads(ctx);
ThreadData td;
td.width = width;
td.height = height;
td.ptr = in->data[plane];
td.linesize = in->linesize[plane];
ctx->internal->execute(ctx, s->filter_horizontally, &td, NULL, FFMIN(height, nb_threads));
td.ptr = out->data[plane];
td.linesize = out->linesize[plane];
ctx->internal->execute(ctx, s->filter_vertically, &td, NULL, FFMIN(width, nb_threads));
}
static int query_formats(AVFilterContext *ctx)
{
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_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_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};
return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
}
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;
if (av_frame_is_writable(in)) {
out = in;
} else {
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);
}
if (out != in)
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
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,
},
{ NULL }
};
static const AVFilterPad avgblur_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
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,
.query_formats = query_formats,
.inputs = avgblur_inputs,
.outputs = avgblur_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
};
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