libavfilter/vf_scroll.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/common.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"

 typedef struct ScrollContext {
     const AVClass *class;

     float h_speed, v_speed;
     float h_pos, v_pos;
     float h_ipos, v_ipos;

     int pos_h[4], pos_v[4];

     const AVPixFmtDescriptor *desc;
     int nb_planes;
     int bytes;

     int planewidth[4];
     int planeheight[4];
 } ScrollContext;

 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_YUVA422P12, AV_PIX_FMT_YUVA444P12,
         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_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
     };

     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
     if (!fmts_list)
         return AVERROR(ENOMEM);
     return ff_set_common_formats(ctx, fmts_list);
 }

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

 static int scroll_slice(AVFilterContext *ctx, void *arg, int jobnr,
                         int nb_jobs)
 {
     ScrollContext *s = ctx->priv;
     ThreadData *td = arg;
     AVFrame *in = td->in;
     AVFrame *out = td->out;

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

         for (int y = slice_start; y < slice_end; y++) {
             int yy = (y + s->pos_v[p]) % h;
             const uint8_t *ssrc = src + yy * in->linesize[p];

             if (s->pos_h[p] < w)
                 memcpy(dst, ssrc + s->pos_h[p], w - s->pos_h[p]);
             if (s->pos_h[p] > 0)
                 memcpy(dst + w - s->pos_h[p], ssrc, s->pos_h[p]);

             dst += out->linesize[p];
         }
     }

     return 0;
 }

 static void scroll(AVFilterContext *ctx, AVFrame *in, AVFrame *out)
 {
     ScrollContext *s = ctx->priv;
     ThreadData td;
     int h_pos, v_pos;

     s->h_pos = fmodf(s->h_pos, in->width);
     s->v_pos = fmodf(s->v_pos, in->height);

     h_pos = s->h_pos;
     v_pos = s->v_pos;

     if (h_pos < 0)
         h_pos += in->width;
     if (v_pos < 0)
         v_pos += in->height;

     s->pos_v[1] = s->pos_v[2] = AV_CEIL_RSHIFT(v_pos, s->desc->log2_chroma_h);
     s->pos_v[0] = s->pos_v[3] = v_pos;
     s->pos_h[1] = s->pos_h[2] = AV_CEIL_RSHIFT(h_pos, s->desc->log2_chroma_w) * s->bytes;
     s->pos_h[0] = s->pos_h[3] = h_pos * s->bytes;

     td.in = in; td.out = out;
     ctx->internal->execute(ctx, scroll_slice, &td, NULL,
                            FFMIN(out->height, ff_filter_get_nb_threads(ctx)));

     s->h_pos += s->h_speed * in->width;
     s->v_pos += s->v_speed * in->height;
 }

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

     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);

     scroll(ctx, in, out);

     av_frame_free(&in);
     return ff_filter_frame(outlink, out);
 }

 static int config_input(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->dst;
     ScrollContext *s = ctx->priv;

     s->desc = av_pix_fmt_desc_get(inlink->format);
     s->nb_planes = s->desc->nb_components;
     s->bytes = (s->desc->comp[0].depth + 7) >> 3;

     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
     s->planeheight[0] = s->planeheight[3] = inlink->h;
     s->planewidth[1]  = s->planewidth[2]  = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
     s->planewidth[0]  = s->planewidth[3]  = inlink->w;

     s->h_pos = (1.f - s->h_ipos) * inlink->w;
     s->v_pos = (1.f - s->v_ipos) * inlink->h;

     return 0;
 }

 #define OFFSET(x) offsetof(ScrollContext, x)
 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 #define VFT AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

 static const AVOption scroll_options[] = {
     { "horizontal", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
     { "h",          "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
     { "vertical",   "set the vertical scrolling speed",   OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
     { "v",          "set the vertical scrolling speed",   OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
     { "hpos",       "set initial horizontal position",    OFFSET(h_ipos),  AV_OPT_TYPE_FLOAT, {.dbl=0.},   0, 1., FLAGS },
     { "vpos",       "set initial vertical position",      OFFSET(v_ipos),  AV_OPT_TYPE_FLOAT, {.dbl=0.},   0, 1., FLAGS },
     { NULL }
 };

 AVFILTER_DEFINE_CLASS(scroll);

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

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

 AVFilter ff_vf_scroll = {
     .name          = "scroll",
     .description   = NULL_IF_CONFIG_SMALL("Scroll input video."),
     .priv_size     = sizeof(ScrollContext),
     .priv_class    = &scroll_class,
     .query_formats = query_formats,
     .inputs        = scroll_inputs,
     .outputs       = scroll_outputs,
     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
     .process_command = ff_filter_process_command,
 };
	/*
	* 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/common.h"
	#include "libavutil/opt.h"
	#include "libavutil/pixdesc.h"
	#include "avfilter.h"
	#include "formats.h"
	#include "internal.h"

	typedef struct ScrollContext {
	const AVClass *class;

	float h_speed, v_speed;
	float h_pos, v_pos;
	float h_ipos, v_ipos;

	int pos_h[4], pos_v[4];

	const AVPixFmtDescriptor *desc;
	int nb_planes;
	int bytes;

	int planewidth[4];
	int planeheight[4];
	} ScrollContext;

	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_YUVA422P12, AV_PIX_FMT_YUVA444P12,
	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_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
	};

	AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
	if (!fmts_list)
	return AVERROR(ENOMEM);
	return ff_set_common_formats(ctx, fmts_list);
	}

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

	static int scroll_slice(AVFilterContext ctx, void arg, int jobnr,
	int nb_jobs)
	{
	ScrollContext *s = ctx->priv;
	ThreadData *td = arg;
	AVFrame *in = td->in;
	AVFrame *out = td->out;

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

	for (int y = slice_start; y < slice_end; y++) {
	int yy = (y + s->pos_v[p]) % h;
	const uint8_t ssrc = src + yy in->linesize[p];

	if (s->pos_h[p] < w)
	memcpy(dst, ssrc + s->pos_h[p], w - s->pos_h[p]);
	if (s->pos_h[p] > 0)
	memcpy(dst + w - s->pos_h[p], ssrc, s->pos_h[p]);

	dst += out->linesize[p];
	}
	}

	return 0;
	}

	static void scroll(AVFilterContext ctx, AVFrame in, AVFrame *out)
	{
	ScrollContext *s = ctx->priv;
	ThreadData td;
	int h_pos, v_pos;

	s->h_pos = fmodf(s->h_pos, in->width);
	s->v_pos = fmodf(s->v_pos, in->height);

	h_pos = s->h_pos;
	v_pos = s->v_pos;

	if (h_pos < 0)
	h_pos += in->width;
	if (v_pos < 0)
	v_pos += in->height;

	s->pos_v[1] = s->pos_v[2] = AV_CEIL_RSHIFT(v_pos, s->desc->log2_chroma_h);
	s->pos_v[0] = s->pos_v[3] = v_pos;
	s->pos_h[1] = s->pos_h[2] = AV_CEIL_RSHIFT(h_pos, s->desc->log2_chroma_w) * s->bytes;
	s->pos_h[0] = s->pos_h[3] = h_pos * s->bytes;

	td.in = in; td.out = out;
	ctx->internal->execute(ctx, scroll_slice, &td, NULL,
	FFMIN(out->height, ff_filter_get_nb_threads(ctx)));

	s->h_pos += s->h_speed * in->width;
	s->v_pos += s->v_speed * in->height;
	}

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

	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);

	scroll(ctx, in, out);

	av_frame_free(&in);
	return ff_filter_frame(outlink, out);
	}

	static int config_input(AVFilterLink *inlink)
	{
	AVFilterContext *ctx = inlink->dst;
	ScrollContext *s = ctx->priv;

	s->desc = av_pix_fmt_desc_get(inlink->format);
	s->nb_planes = s->desc->nb_components;
	s->bytes = (s->desc->comp[0].depth + 7) >> 3;

	s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
	s->planeheight[0] = s->planeheight[3] = inlink->h;
	s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
	s->planewidth[0] = s->planewidth[3] = inlink->w;

	s->h_pos = (1.f - s->h_ipos) * inlink->w;
	s->v_pos = (1.f - s->v_ipos) * inlink->h;

	return 0;
	}

	#define OFFSET(x) offsetof(ScrollContext, x)
	#define FLAGS AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM
	#define VFT AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_RUNTIME_PARAM

	static const AVOption scroll_options[] = {
	{ "horizontal", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
	{ "h", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
	{ "vertical", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
	{ "v", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
	{ "hpos", "set initial horizontal position", OFFSET(h_ipos), AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS },
	{ "vpos", "set initial vertical position", OFFSET(v_ipos), AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS },
	{ NULL }
	};

	AVFILTER_DEFINE_CLASS(scroll);

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

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

	AVFilter ff_vf_scroll = {
	.name = "scroll",
	.description = NULL_IF_CONFIG_SMALL("Scroll input video."),
	.priv_size = sizeof(ScrollContext),
	.priv_class = &scroll_class,
	.query_formats = query_formats,
	.inputs = scroll_inputs,
	.outputs = scroll_outputs,
	.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC \| AVFILTER_FLAG_SLICE_THREADS,
	.process_command = ff_filter_process_command,
	};