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avfilter: add scroll video filter

tags/n4.3
Paul B Mahol 6 years ago
parent
5161b279d6
commit
a746359ede
6 changed files with 222 additions and 1 deletions
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  1. +1
    -0
      Changelog
  2. +20
    -0
      doc/filters.texi
  3. +1
    -0
      libavfilter/Makefile
  4. +1
    -0
      libavfilter/allfilters.c
  5. +1
    -1
      libavfilter/version.h
  6. +198
    -0
      libavfilter/vf_scroll.c

+ 1
- 0
Changelog View File

@@ -12,6 +12,7 @@ version <next>:
- support Sipro ACELP.KELVIN decoding
- streamhash muxer
- sierpinski video source
- scroll video filter


version 4.2:


+ 20
- 0
doc/filters.texi View File

@@ -15650,6 +15650,26 @@ Scale a logo to 1/10th the height of a video, while preserving its display aspec
@end example
@end itemize

@section scroll
Scroll input video horizontally and/or vertically by constant speed.

The filter accepts the following options:
@table @option
@item horizontal, h
Set the horizontal scrolling speed. Default is 0. Allowed range is from -1 to 1.
Negative values changes scrolling direction.

@item vertical, v
Set the vertical scrolling speed. Default is 0. Allowed range is from -1 to 1.
Negative values changes scrolling direction.

@item hpos
Set the initial horizontal scrolling position. Default is 0. Allowed range is from 0 to 1.

@item vpos
Set the initial vertical scrolling position. Default is 0. Allowed range is from 0 to 1.
@end table

@anchor{selectivecolor}
@section selectivecolor



+ 1
- 0
libavfilter/Makefile View File

@@ -356,6 +356,7 @@ OBJS-$(CONFIG_SCALE_NPP_FILTER) += vf_scale_npp.o scale.o
OBJS-$(CONFIG_SCALE_QSV_FILTER) += vf_scale_qsv.o
OBJS-$(CONFIG_SCALE_VAAPI_FILTER) += vf_scale_vaapi.o scale.o vaapi_vpp.o
OBJS-$(CONFIG_SCALE2REF_FILTER) += vf_scale.o scale.o
OBJS-$(CONFIG_SCROLL_FILTER) += vf_scroll.o
OBJS-$(CONFIG_SELECT_FILTER) += f_select.o
OBJS-$(CONFIG_SELECTIVECOLOR_FILTER) += vf_selectivecolor.o
OBJS-$(CONFIG_SENDCMD_FILTER) += f_sendcmd.o


+ 1
- 0
libavfilter/allfilters.c View File

@@ -338,6 +338,7 @@ extern AVFilter ff_vf_scale_npp;
extern AVFilter ff_vf_scale_qsv;
extern AVFilter ff_vf_scale_vaapi;
extern AVFilter ff_vf_scale2ref;
extern AVFilter ff_vf_scroll;
extern AVFilter ff_vf_select;
extern AVFilter ff_vf_selectivecolor;
extern AVFilter ff_vf_sendcmd;


+ 1
- 1
libavfilter/version.h View File

@@ -30,7 +30,7 @@
#include "libavutil/version.h"

#define LIBAVFILTER_VERSION_MAJOR 7
#define LIBAVFILTER_VERSION_MINOR 59
#define LIBAVFILTER_VERSION_MINOR 60
#define LIBAVFILTER_VERSION_MICRO 100




+ 198
- 0
libavfilter/vf_scroll.c View File

@@ -0,0 +1,198 @@
/*
* 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;

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_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);
}

static void scroll(ScrollContext *s, AVFrame *in, AVFrame *out)
{
int h_pos, v_pos;
int pos_h[4], pos_v[4];

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;

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

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

for (int y = 0; y < h; y++) {
int yy = (y + pos_v[p]) % h;
const uint8_t *ssrc = src + yy * in->linesize[p];

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

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

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;
ScrollContext *s = ctx->priv;
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(s, 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

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

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