libavfilter/vf_lagfun.c - manifest_repos/ffmpeg - Git at Google

 /*
  * Copyright (c) 2019 Paul B Mahol
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 #include "libavutil/imgutils.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"

 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"
 #include "video.h"

 typedef struct LagfunContext {
     const AVClass *class;
     const AVPixFmtDescriptor *desc;
     float decay;
     int planes;

     int depth;
     int nb_planes;
     int linesize[4];
     int height[4];

     AVFrame *old;

     int (*lagfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
 } LagfunContext;

 static int query_formats(AVFilterContext *ctx)
 {
     static const enum AVPixelFormat pixel_fmts[] = {
         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_YUV410P, AV_PIX_FMT_YUV411P,
         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
         AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
         AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
         AV_PIX_FMT_YUVJ411P,
         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_YUV440P10,
         AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
         AV_PIX_FMT_YUV440P12,
         AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
         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_NONE
     };
     AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
     if (!formats)
         return AVERROR(ENOMEM);
     return ff_set_common_formats(ctx, formats);
 }

 typedef struct ThreadData {
     AVFrame *in, *out, *old;
 } ThreadData;

 static int lagfun_frame8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 {
     LagfunContext *s = ctx->priv;
     const float decay = s->decay;
     ThreadData *td = arg;
     AVFrame *in = td->in;
     AVFrame *out = td->out;
     AVFrame *old = td->old;

     for (int p = 0; p < s->nb_planes; p++) {
         const int slice_start = (s->height[p] * jobnr) / nb_jobs;
         const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
         const uint8_t *src = in->data[p] + slice_start * in->linesize[p];
         const uint8_t *osrc = old->data[p] + slice_start * old->linesize[p];
         uint8_t *dst = out->data[p] + slice_start * out->linesize[p];

         if (!((1 << p) & s->planes)) {
             av_image_copy_plane(dst, out->linesize[p],
                                 src, in->linesize[p],
                                 s->linesize[p], slice_end - slice_start);
             continue;
         }

         for (int y = slice_start; y < slice_end; y++) {
             for (int x = 0; x < s->linesize[p]; x++)
                 dst[x] = FFMAX(src[x], osrc[x] * decay);

             src += in->linesize[p];
             osrc += old->linesize[p];
             dst += out->linesize[p];
         }
     }

     return 0;
 }

 static int lagfun_frame16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 {
     LagfunContext *s = ctx->priv;
     const float decay = s->decay;
     ThreadData *td = arg;
     AVFrame *in = td->in;
     AVFrame *out = td->out;
     AVFrame *old = td->old;

     for (int p = 0; p < s->nb_planes; p++) {
         const int slice_start = (s->height[p] * jobnr) / nb_jobs;
         const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
         const uint16_t *src = (const uint16_t *)in->data[p] + slice_start * in->linesize[p] / 2;
         const uint16_t *osrc = (const uint16_t *)old->data[p] + slice_start * old->linesize[p] / 2;
         uint16_t *dst = (uint16_t *)out->data[p] + slice_start * out->linesize[p] / 2;

         if (!((1 << p) & s->planes)) {
             av_image_copy_plane((uint8_t *)dst, out->linesize[p],
                                 (uint8_t *)src, in->linesize[p],
                                 s->linesize[p], slice_end - slice_start);
             continue;
         }

         for (int y = slice_start; y < slice_end; y++) {
             for (int x = 0; x < s->linesize[p] / 2; x++)
                 dst[x] = FFMAX(src[x], osrc[x] * decay);

             src += in->linesize[p] / 2;
             osrc += old->linesize[p] / 2;
             dst += out->linesize[p] / 2;
         }
     }

     return 0;
 }

 static int config_output(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
     LagfunContext *s = ctx->priv;
     AVFilterLink *inlink = ctx->inputs[0];
     int ret;

     s->desc = av_pix_fmt_desc_get(outlink->format);
     if (!s->desc)
         return AVERROR_BUG;
     s->nb_planes = av_pix_fmt_count_planes(outlink->format);
     s->depth = s->desc->comp[0].depth;
     s->lagfun = s->depth <= 8 ? lagfun_frame8 : lagfun_frame16;

     if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
         return ret;

     s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
     s->height[0] = s->height[3] = inlink->h;

     return 0;
 }

 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 {
     AVFilterContext *ctx = inlink->dst;
     AVFilterLink *outlink = ctx->outputs[0];
     LagfunContext *s = ctx->priv;
     ThreadData td;
     AVFrame *out;

     if (!s->old) {
         s->old = av_frame_clone(in);
         return ff_filter_frame(outlink, in);
     }

     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
     if (!out) {
         av_frame_free(&in);
         return AVERROR(ENOMEM);
     }
     out->pts = in->pts;

     td.out = out;
     td.in = in;
     td.old = s->old;
     ctx->internal->execute(ctx, s->lagfun, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));

     av_frame_free(&s->old);
     av_frame_free(&in);
     s->old = av_frame_clone(out);
     return ff_filter_frame(outlink, out);
 }

 static av_cold void uninit(AVFilterContext *ctx)
 {
     LagfunContext *s = ctx->priv;

     av_frame_free(&s->old);
 }

 #define OFFSET(x) offsetof(LagfunContext, x)
 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM

 static const AVOption lagfun_options[] = {
     { "decay",  "set decay",                 OFFSET(decay),  AV_OPT_TYPE_FLOAT, {.dbl=.95},  0,  1,  FLAGS },
     { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15},   0, 15,  FLAGS },
     { NULL },
 };

 static const AVFilterPad inputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .filter_frame  = filter_frame,
     },
     { NULL }
 };

 static const AVFilterPad outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .config_props  = config_output,
     },
     { NULL }
 };

 AVFILTER_DEFINE_CLASS(lagfun);

 AVFilter ff_vf_lagfun = {
     .name          = "lagfun",
     .description   = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
     .priv_size     = sizeof(LagfunContext),
     .priv_class    = &lagfun_class,
     .query_formats = query_formats,
     .uninit        = uninit,
     .outputs       = outputs,
     .inputs        = inputs,
     .flags         = AVFILTER_FLAG_SLICE_THREADS,
 };
	/*
	* Copyright (c) 2019 Paul B Mahol
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* FFmpeg is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with FFmpeg; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include "libavutil/imgutils.h"
	#include "libavutil/intreadwrite.h"
	#include "libavutil/opt.h"
	#include "libavutil/pixdesc.h"

	#include "avfilter.h"
	#include "formats.h"
	#include "internal.h"
	#include "video.h"

	typedef struct LagfunContext {
	const AVClass *class;
	const AVPixFmtDescriptor *desc;
	float decay;
	int planes;

	int depth;
	int nb_planes;
	int linesize[4];
	int height[4];

	AVFrame *old;

	int (lagfun)(AVFilterContext ctx, void *arg, int jobnr, int nb_jobs);
	} LagfunContext;

	static int query_formats(AVFilterContext *ctx)
	{
	static const enum AVPixelFormat pixel_fmts[] = {
	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_YUV410P, AV_PIX_FMT_YUV411P,
	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
	AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
	AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
	AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
	AV_PIX_FMT_YUVJ411P,
	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_YUV440P10,
	AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
	AV_PIX_FMT_YUV440P12,
	AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
	AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
	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_NONE
	};
	AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
	if (!formats)
	return AVERROR(ENOMEM);
	return ff_set_common_formats(ctx, formats);
	}

	typedef struct ThreadData {
	AVFrame in, out, *old;
	} ThreadData;

	static int lagfun_frame8(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)
	{
	LagfunContext *s = ctx->priv;
	const float decay = s->decay;
	ThreadData *td = arg;
	AVFrame *in = td->in;
	AVFrame *out = td->out;
	AVFrame *old = td->old;

	for (int p = 0; p < s->nb_planes; p++) {
	const int slice_start = (s->height[p] * jobnr) / nb_jobs;
	const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
	const uint8_t src = in->data[p] + slice_start in->linesize[p];
	const uint8_t osrc = old->data[p] + slice_start old->linesize[p];
	uint8_t dst = out->data[p] + slice_start out->linesize[p];

	if (!((1 << p) & s->planes)) {
	av_image_copy_plane(dst, out->linesize[p],
	src, in->linesize[p],
	s->linesize[p], slice_end - slice_start);
	continue;
	}

	for (int y = slice_start; y < slice_end; y++) {
	for (int x = 0; x < s->linesize[p]; x++)
	dst[x] = FFMAX(src[x], osrc[x] * decay);

	src += in->linesize[p];
	osrc += old->linesize[p];
	dst += out->linesize[p];
	}
	}

	return 0;
	}

	static int lagfun_frame16(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)
	{
	LagfunContext *s = ctx->priv;
	const float decay = s->decay;
	ThreadData *td = arg;
	AVFrame *in = td->in;
	AVFrame *out = td->out;
	AVFrame *old = td->old;

	for (int p = 0; p < s->nb_planes; p++) {
	const int slice_start = (s->height[p] * jobnr) / nb_jobs;
	const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
	const uint16_t src = (const uint16_t )in->data[p] + slice_start * in->linesize[p] / 2;
	const uint16_t osrc = (const uint16_t )old->data[p] + slice_start * old->linesize[p] / 2;
	uint16_t dst = (uint16_t )out->data[p] + slice_start * out->linesize[p] / 2;

	if (!((1 << p) & s->planes)) {
	av_image_copy_plane((uint8_t *)dst, out->linesize[p],
	(uint8_t *)src, in->linesize[p],
	s->linesize[p], slice_end - slice_start);
	continue;
	}

	for (int y = slice_start; y < slice_end; y++) {
	for (int x = 0; x < s->linesize[p] / 2; x++)
	dst[x] = FFMAX(src[x], osrc[x] * decay);

	src += in->linesize[p] / 2;
	osrc += old->linesize[p] / 2;
	dst += out->linesize[p] / 2;
	}
	}

	return 0;
	}

	static int config_output(AVFilterLink *outlink)
	{
	AVFilterContext *ctx = outlink->src;
	LagfunContext *s = ctx->priv;
	AVFilterLink *inlink = ctx->inputs[0];
	int ret;

	s->desc = av_pix_fmt_desc_get(outlink->format);
	if (!s->desc)
	return AVERROR_BUG;
	s->nb_planes = av_pix_fmt_count_planes(outlink->format);
	s->depth = s->desc->comp[0].depth;
	s->lagfun = s->depth <= 8 ? lagfun_frame8 : lagfun_frame16;

	if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
	return ret;

	s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
	s->height[0] = s->height[3] = inlink->h;

	return 0;
	}

	static int filter_frame(AVFilterLink inlink, AVFrame in)
	{
	AVFilterContext *ctx = inlink->dst;
	AVFilterLink *outlink = ctx->outputs[0];
	LagfunContext *s = ctx->priv;
	ThreadData td;
	AVFrame *out;

	if (!s->old) {
	s->old = av_frame_clone(in);
	return ff_filter_frame(outlink, in);
	}

	out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
	if (!out) {
	av_frame_free(&in);
	return AVERROR(ENOMEM);
	}
	out->pts = in->pts;

	td.out = out;
	td.in = in;
	td.old = s->old;
	ctx->internal->execute(ctx, s->lagfun, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));

	av_frame_free(&s->old);
	av_frame_free(&in);
	s->old = av_frame_clone(out);
	return ff_filter_frame(outlink, out);
	}

	static av_cold void uninit(AVFilterContext *ctx)
	{
	LagfunContext *s = ctx->priv;

	av_frame_free(&s->old);
	}

	#define OFFSET(x) offsetof(LagfunContext, x)
	#define FLAGS AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_FILTERING_PARAM

	static const AVOption lagfun_options[] = {
	{ "decay", "set decay", OFFSET(decay), AV_OPT_TYPE_FLOAT, {.dbl=.95}, 0, 1, FLAGS },
	{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
	{ NULL },
	};

	static const AVFilterPad inputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.filter_frame = filter_frame,
	},
	{ NULL }
	};

	static const AVFilterPad outputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.config_props = config_output,
	},
	{ NULL }
	};

	AVFILTER_DEFINE_CLASS(lagfun);

	AVFilter ff_vf_lagfun = {
	.name = "lagfun",
	.description = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
	.priv_size = sizeof(LagfunContext),
	.priv_class = &lagfun_class,
	.query_formats = query_formats,
	.uninit = uninit,
	.outputs = outputs,
	.inputs = inputs,
	.flags = AVFILTER_FLAG_SLICE_THREADS,
	};