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avfilter: add chromashift filter

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pull/301/head
Paul B Mahol 6 years ago
parent 8f875a90c4
commit cfd421226c
4 changed files with 278 additions and 0 deletions
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  1. 17
      doc/filters.texi
  2. 1
      libavfilter/Makefile
  3. 1
      libavfilter/allfilters.c
  4. 259
      libavfilter/vf_chromashift.c

17
doc/filters.texi
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@ -6253,6 +6253,23 @@ ffmpeg -f lavfi -i color=c=black:s=1280x720 -i video.mp4 -shortest -filter_compl
@end example
@end itemize
@section chromashift
Shift chroma pixels horizontally and/or vertically.
The filter accepts the following options:
@table @option
@item cbh
Set amount to shift chroma-blue horizontally.
@item cbv
Set amount to shift chroma-blue vertically.
@item crh
Set amount to shift chroma-red horizontally.
@item crv
Set amount to shift chroma-red vertically.
@item edge
Set edge mode, can be @var{smear}, default, or @var{warp}.
@end table
@section ciescope
Display CIE color diagram with pixels overlaid onto it.

1
libavfilter/Makefile
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@ -169,6 +169,7 @@ OBJS-$(CONFIG_BOXBLUR_OPENCL_FILTER) += vf_avgblur_opencl.o opencl.o \
OBJS-$(CONFIG_BWDIF_FILTER) += vf_bwdif.o
OBJS-$(CONFIG_CHROMAHOLD_FILTER) += vf_chromakey.o
OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o
OBJS-$(CONFIG_CHROMASHIFT_FILTER) += vf_chromashift.o
OBJS-$(CONFIG_CIESCOPE_FILTER) += vf_ciescope.o
OBJS-$(CONFIG_CODECVIEW_FILTER) += vf_codecview.o
OBJS-$(CONFIG_COLORBALANCE_FILTER) += vf_colorbalance.o

1
libavfilter/allfilters.c
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@ -158,6 +158,7 @@ extern AVFilter ff_vf_boxblur_opencl;
extern AVFilter ff_vf_bwdif;
extern AVFilter ff_vf_chromahold;
extern AVFilter ff_vf_chromakey;
extern AVFilter ff_vf_chromashift;
extern AVFilter ff_vf_ciescope;
extern AVFilter ff_vf_codecview;
extern AVFilter ff_vf_colorbalance;

259
libavfilter/vf_chromashift.c
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@ -0,0 +1,259 @@
/*
* Copyright (c) 2018 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/avstring.h"
#include "libavutil/eval.h"
#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 "framesync.h"
#include "video.h"
typedef struct ChromaShiftContext {
const AVClass *class;
int cbh, cbv;
int crh, crv;
int edge;
int depth;
int height[4];
int width[4];
int linesize[4];
AVFrame *in;
int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} ChromaShiftContext;
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, 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_YUV440P10,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, 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_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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);
}
#define DEFINE_SMEAR(depth, type, div) \
static int smear_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
{ \
ChromaShiftContext *s = ctx->priv; \
AVFrame *in = s->in; \
AVFrame *out = arg; \
const int sulinesize = in->linesize[1] / div; \
const int svlinesize = in->linesize[2] / div; \
const int ulinesize = out->linesize[1] / div; \
const int vlinesize = out->linesize[2] / div; \
const int cbh = s->cbh; \
const int cbv = s->cbv; \
const int crh = s->crh; \
const int crv = s->crv; \
const int h = s->height[1]; \
const int w = s->width[1]; \
const int slice_start = (h * jobnr) / nb_jobs; \
const int slice_end = (h * (jobnr+1)) / nb_jobs; \
const type *su = (const type *)in->data[1]; \
const type *sv = (const type *)in->data[2]; \
type *du = (type *)out->data[1] + slice_start * ulinesize; \
type *dv = (type *)out->data[2] + slice_start * vlinesize; \
\
for (int y = slice_start; y < slice_end; y++) { \
const int duy = av_clip(y - cbv, 0, h-1) * sulinesize; \
const int dvy = av_clip(y - crv, 0, h-1) * svlinesize; \
\
for (int x = 0; x < w; x++) { \
du[x] = su[av_clip(x - cbh, 0, w - 1) + duy]; \
dv[x] = sv[av_clip(x - crh, 0, w - 1) + dvy]; \
} \
\
du += ulinesize; \
dv += vlinesize; \
} \
\
return 0; \
}
DEFINE_SMEAR(8, uint8_t, 1)
DEFINE_SMEAR(16, uint16_t, 2)
#define DEFINE_WRAP(depth, type, div) \
static int wrap_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
{ \
ChromaShiftContext *s = ctx->priv; \
AVFrame *in = s->in; \
AVFrame *out = arg; \
const int sulinesize = in->linesize[1] / div; \
const int svlinesize = in->linesize[2] / div; \
const int ulinesize = out->linesize[1] / div; \
const int vlinesize = out->linesize[2] / div; \
const int cbh = s->cbh; \
const int cbv = s->cbv; \
const int crh = s->crh; \
const int crv = s->crv; \
const int h = s->height[1]; \
const int w = s->width[1]; \
const int slice_start = (h * jobnr) / nb_jobs; \
const int slice_end = (h * (jobnr+1)) / nb_jobs; \
const type *su = (const type *)in->data[1]; \
const type *sv = (const type *)in->data[2]; \
type *du = (type *)out->data[1] + slice_start * ulinesize; \
type *dv = (type *)out->data[2] + slice_start * vlinesize; \
\
for (int y = slice_start; y < slice_end; y++) { \
int uy = (y - cbv) % h; \
int vy = (y - crv) % h; \
\
if (uy < 0) \
uy += h; \
if (vy < 0) \
vy += h; \
\
for (int x = 0; x < w; x++) { \
int ux = (x - cbh) % w; \
int vx = (x - crh) % w; \
\
if (ux < 0) \
ux += w; \
if (vx < 0) \
vx += w; \
\
du[x] = su[ux + uy * sulinesize]; \
dv[x] = sv[vx + vy * svlinesize]; \
} \
\
du += ulinesize; \
dv += vlinesize; \
} \
\
return 0; \
}
DEFINE_WRAP(8, uint8_t, 1)
DEFINE_WRAP(16, uint16_t, 2)
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
ChromaShiftContext *s = ctx->priv;
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);
s->in = in;
av_image_copy_plane(out->data[0] + out->linesize[0],
out->linesize[0],
in->data[0], in->linesize[0],
s->linesize[0], s->height[0]);
ctx->internal->execute(ctx, s->filter_slice, out, NULL,
FFMIN3(s->height[1],
s->height[2],
ff_filter_get_nb_threads(ctx)));
s->in = NULL;
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ChromaShiftContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
s->depth = desc->comp[0].depth;
if (s->edge)
s->filter_slice = s->depth > 8 ? wrap_slice16 : wrap_slice8;
else
s->filter_slice = s->depth > 8 ? smear_slice16 : smear_slice8;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->height[0] = s->height[3] = inlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->width[0] = s->width[3] = inlink->w;
return av_image_fill_linesizes(s->linesize, inlink->format, inlink->w);
}
#define OFFSET(x) offsetof(ChromaShiftContext, x)
#define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
static const AVOption chromashift_options[] = {
{ "cbh", "shift chroma-blue horizontally", OFFSET(cbh), AV_OPT_TYPE_INT, {.i64=0}, -255, 255, .flags = VF },
{ "cbv", "shift chroma-blue vertically", OFFSET(cbv), AV_OPT_TYPE_INT, {.i64=0}, -255, 255, .flags = VF },
{ "crh", "shift chroma-red horizontally", OFFSET(crh), AV_OPT_TYPE_INT, {.i64=0}, -255, 255, .flags = VF },
{ "crv", "shift chroma-red vertically", OFFSET(crv), AV_OPT_TYPE_INT, {.i64=0}, -255, 255, .flags = VF },
{ "edge", "set edge operation", OFFSET(edge), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, .flags = VF, "edge" },
{ "smear", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags = VF, "edge" },
{ "wrap", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags = VF, "edge" },
{ NULL },
};
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFILTER_DEFINE_CLASS(chromashift);
AVFilter ff_vf_chromashift = {
.name = "chromashift",
.description = NULL_IF_CONFIG_SMALL("Shift chroma."),
.priv_size = sizeof(ChromaShiftContext),
.priv_class = &chromashift_class,
.query_formats = query_formats,
.outputs = outputs,
.inputs = inputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
};
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