/*
* Copyright (c) 2016 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/attributes.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "framesync.h"
static const char *const var_names[] = {
"w", ///< width of the input video
"h", ///< height of the input video
"x", ///< input value for the pixel from input #1
"y", ///< input value for the pixel from input #2
"bdx", ///< input #1 video bitdepth
"bdy", ///< input #2 video bitdepth
NULL
};
enum var_name {
VAR_W,
VAR_H,
VAR_X,
VAR_Y,
VAR_BITDEPTHX,
VAR_BITDEPTHY,
VAR_VARS_NB
};
typedef struct LUT2Context {
const AVClass *class;
FFFrameSync fs;
int odepth;
char *comp_expr_str[4];
AVExpr *comp_expr[4];
double var_values[VAR_VARS_NB];
uint16_t *lut[4]; ///< lookup table for each component
int width[4], height[4];
int widthx[4], heightx[4];
int widthy[4], heighty[4];
int nb_planesx;
int nb_planesy;
int nb_planes;
int depth, depthx, depthy;
int tlut2;
AVFrame *prev_frame; /* only used with tlut2 */
int (*lut2)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} LUT2Context;
typedef struct ThreadData {
AVFrame *out, *srcx, *srcy;
} ThreadData;
#define OFFSET(x) offsetof(LUT2Context, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption options[] = {
{ "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ "d", "set output depth", OFFSET(odepth), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 16, .flags = FLAGS },
{ NULL }
};
static av_cold void uninit(AVFilterContext *ctx)
{
LUT2Context *s = ctx->priv;
int i;
ff_framesync_uninit(&s->fs);
av_frame_free(&s->prev_frame);
for (i = 0; i < 4; i++) {
av_expr_free(s->comp_expr[i]);
s->comp_expr[i] = NULL;
av_freep(&s->comp_expr_str[i]);
av_freep(&s->lut[i]);
}
}
#define BIT8_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_GRAY8, AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
#define BIT9_FMTS \
AV_PIX_FMT_GBRP9, AV_PIX_FMT_GRAY9, \
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, \
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
#define BIT10_FMTS \
AV_PIX_FMT_GRAY10, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, \
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, \
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
#define BIT12_FMTS \
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, \
AV_PIX_FMT_GRAY12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRP12,
#define BIT14_FMTS \
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, \
AV_PIX_FMT_GRAY12, AV_PIX_FMT_GBRP14,
#define BIT16_FMTS \
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_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,
static int query_formats(AVFilterContext *ctx)
{
LUT2Context *s = ctx->priv;
static const enum AVPixelFormat all_pix_fmts[] = {
BIT8_FMTS
BIT9_FMTS
BIT10_FMTS
BIT12_FMTS
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat bit8_pix_fmts[] = {
BIT8_FMTS
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat bit9_pix_fmts[] = {
BIT9_FMTS
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat bit10_pix_fmts[] = {
BIT10_FMTS
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat bit12_pix_fmts[] = {
BIT12_FMTS
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat bit14_pix_fmts[] = {
BIT14_FMTS
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat bit16_pix_fmts[] = {
BIT16_FMTS
AV_PIX_FMT_NONE
};
const enum AVPixelFormat *pix_fmts;
int ret;
if (s->tlut2 || !s->odepth)
return ff_set_common_formats(ctx, ff_make_format_list(all_pix_fmts));
ret = ff_formats_ref(ff_make_format_list(all_pix_fmts), &ctx->inputs[0]->out_formats);
if (ret < 0)
return ret;
switch (s->odepth) {
case 8: pix_fmts = bit8_pix_fmts; break;
case 9: pix_fmts = bit9_pix_fmts; break;
case 10: pix_fmts = bit10_pix_fmts; break;
case 12: pix_fmts = bit12_pix_fmts; break;
case 14: pix_fmts = bit14_pix_fmts; break;
case 16: pix_fmts = bit16_pix_fmts; break;
default: av_log(ctx, AV_LOG_ERROR, "Unsupported output bit depth %d.\n", s->odepth);
return AVERROR(EINVAL);
}
return ff_formats_ref(ff_make_format_list(pix_fmts), &ctx->outputs[0]->in_formats);
}
static int config_inputx(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
LUT2Context *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int hsub = desc->log2_chroma_w;
int vsub = desc->log2_chroma_h;
s->nb_planesx = av_pix_fmt_count_planes(inlink->format);
s->heightx[1] = s->heightx[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->heightx[0] = s->heightx[3] = inlink->h;
s->widthx[1] = s->widthx[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->widthx[0] = s->widthx[3] = inlink->w;
s->var_values[VAR_W] = inlink->w;
s->var_values[VAR_H] = inlink->h;
s->depthx = desc->comp[0].depth;
s->var_values[VAR_BITDEPTHX] = s->depthx;
if (s->tlut2) {
s->depthy = desc->comp[0].depth;
s->var_values[VAR_BITDEPTHY] = s->depthy;
}
return 0;
}
static int config_inputy(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
LUT2Context *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int hsub = desc->log2_chroma_w;
int vsub = desc->log2_chroma_h;
s->nb_planesy = av_pix_fmt_count_planes(inlink->format);
s->depthy = desc->comp[0].depth;
s->var_values[VAR_BITDEPTHY] = s->depthy;
s->heighty[1] = s->heighty[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->heighty[0] = s->heighty[3] = inlink->h;
s->widthy[1] = s->widthy[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->widthy[0] = s->widthy[3] = inlink->w;
return 0;
}
#define DEFINE_LUT2(zname, xname, yname, ztype, xtype, ytype, zdiv, xdiv, ydiv) \
static int lut2_##zname##_##xname##_##yname(AVFilterContext *ctx, \
void *arg, \
int jobnr, int nb_jobs) \
{ \
LUT2Context *s = ctx->priv; \
ThreadData *td = arg; \
AVFrame *out = td->out; \
AVFrame *srcx = td->srcx; \
AVFrame *srcy = td->srcy; \
const int odepth = s->odepth; \
int p, y, x; \
\
for (p = 0; p < s->nb_planes; p++) { \
const int slice_start = (s->heightx[p] * jobnr) / nb_jobs; \
const int slice_end = (s->heightx[p] * (jobnr+1)) / nb_jobs; \
const uint16_t *lut = s->lut[p]; \
const xtype *srcxx; \
const ytype *srcyy; \
ztype *dst; \
\
dst = (ztype *)(out->data[p] + slice_start * out->linesize[p]); \
srcxx = (const xtype *)(srcx->data[p] + slice_start * srcx->linesize[p]);\
srcyy = (const ytype *)(srcy->data[p] + slice_start * srcy->linesize[p]);\
\
for (y = slice_start; y < slice_end; y++) { \
for (x = 0; x < s->widthx[p]; x++) { \
dst[x] = av_clip_uintp2_c(lut[(srcyy[x] << s->depthx) | srcxx[x]], odepth); \
} \
\
dst += out->linesize[p] / zdiv; \
srcxx += srcx->linesize[p] / xdiv; \
srcyy += srcy->linesize[p] / ydiv; \
} \
} \
return 0; \
}
DEFINE_LUT2(8, 8, 8, uint8_t, uint8_t, uint8_t, 1, 1, 1)
DEFINE_LUT2(8, 8, 16, uint8_t, uint8_t, uint16_t, 1, 1, 2)
DEFINE_LUT2(8, 16, 8, uint8_t, uint16_t, uint8_t, 1, 2, 1)
DEFINE_LUT2(8, 16, 16, uint8_t, uint16_t, uint16_t, 1, 2, 2)
DEFINE_LUT2(16, 8, 8, uint16_t, uint8_t, uint8_t, 2, 1, 1)
DEFINE_LUT2(16, 8, 16, uint16_t, uint8_t, uint16_t, 2, 1, 2)
DEFINE_LUT2(16, 16, 8, uint16_t, uint16_t, uint8_t, 2, 2, 1)
DEFINE_LUT2(16, 16, 16, uint16_t, uint16_t, uint16_t, 2, 2, 2)
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
LUT2Context *s = fs->opaque;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *srcx = NULL, *srcy = NULL;
int ret;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &srcx, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &srcy, 0)) < 0)
return ret;
if (ctx->is_disabled || !srcy) {
out = av_frame_clone(srcx);
if (!out)
return AVERROR(ENOMEM);
} else {
ThreadData td;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
av_frame_copy_props(out, srcx);
td.out = out;
td.srcx = srcx;
td.srcy = srcy;
ctx->internal->execute(ctx, s->lut2, &td, NULL, FFMIN(s->heightx[1], ff_filter_get_nb_threads(ctx)));
}
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
return ff_filter_frame(outlink, out);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LUT2Context *s = ctx->priv;
int p, ret;
s->depth = s->depthx + s->depthy;
s->nb_planes = s->nb_planesx;
s->lut2 = s->depth > 16 ? lut2_16_16_16 : lut2_8_8_8;
if (s->odepth) {
if (s->depthx == 8 && s->depthy == 8 && s->odepth > 8)
s->lut2 = lut2_16_8_8;
if (s->depthx > 8 && s->depthy == 8 && s->odepth > 8)
s->lut2 = lut2_16_16_8;
if (s->depthx == 8 && s->depthy > 8 && s->odepth > 8)
s->lut2 = lut2_16_8_16;
if (s->depthx == 8 && s->depthy == 8 && s->odepth == 8)
s->lut2 = lut2_8_8_8;
if (s->depthx > 8 && s->depthy == 8 && s->odepth == 8)
s->lut2 = lut2_8_16_8;
if (s->depthx == 8 && s->depthy > 8 && s->odepth == 8)
s->lut2 = lut2_8_8_16;
if (s->depthx > 8 && s->depthy > 8 && s->odepth == 8)
s->lut2 = lut2_8_16_16;
} else {
s->odepth = s->depthx;
}
for (p = 0; p < s->nb_planes; p++) {
s->lut[p] = av_malloc_array(1 << s->depth, sizeof(uint16_t));
if (!s->lut[p])
return AVERROR(ENOMEM);
}
for (p = 0; p < s->nb_planes; p++) {
double res;
int x, y;
/* create the parsed expression */
av_expr_free(s->comp_expr[p]);
s->comp_expr[p] = NULL;
ret = av_expr_parse(&s->comp_expr[p], s->comp_expr_str[p],
var_names, NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0) {
av_log(ctx, AV_LOG_ERROR,
"Error when parsing the expression '%s' for the component %d.\n",
s->comp_expr_str[p], p);
return AVERROR(EINVAL);
}
/* compute the lut */
for (y = 0; y < (1 << s->depthy); y++) {
s->var_values[VAR_Y] = y;
for (x = 0; x < (1 << s->depthx); x++) {
s->var_values[VAR_X] = x;
res = av_expr_eval(s->comp_expr[p], s->var_values, s);
if (isnan(res)) {
av_log(ctx, AV_LOG_ERROR,
"Error when evaluating the expression '%s' for the values %d and %d for the component %d.\n",
s->comp_expr_str[p], x, y, p);
return AVERROR(EINVAL);
}
s->lut[p][(y << s->depthx) + x] = res;
}
}
}
return 0;
}
static int lut2_config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LUT2Context *s = ctx->priv;
AVFilterLink *srcx = ctx->inputs[0];
AVFilterLink *srcy = ctx->inputs[1];
FFFrameSyncIn *in;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
int hsub = desc->log2_chroma_w;
int vsub = desc->log2_chroma_h;
int ret;
outlink->w = srcx->w;
outlink->h = srcx->h;
outlink->time_base = srcx->time_base;
outlink->sample_aspect_ratio = srcx->sample_aspect_ratio;
outlink->frame_rate = srcx->frame_rate;
s->nb_planes = av_pix_fmt_count_planes(outlink->format);
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(outlink->h, vsub);
s->height[0] = s->height[3] = outlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(outlink->w, hsub);
s->width[0] = s->width[3] = outlink->w;
if (!s->odepth && srcx->format != srcy->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
return AVERROR(EINVAL);
}
if (srcx->w != srcy->w || srcx->h != srcy->h) {
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
"(size %dx%d) do not match the corresponding "
"second input link %s parameters (size %dx%d)\n",
ctx->input_pads[0].name, srcx->w, srcx->h,
ctx->input_pads[1].name,
srcy->w, srcy->h);
return AVERROR(EINVAL);
}
if (s->nb_planesx != s->nb_planesy) {
av_log(ctx, AV_LOG_ERROR, "First input link %s number of planes "
"(%d) do not match the corresponding "
"second input link %s number of planes (%d)\n",
ctx->input_pads[0].name, s->nb_planesx,
ctx->input_pads[1].name, s->nb_planesy);
return AVERROR(EINVAL);
}
if (s->nb_planesx != s->nb_planes) {
av_log(ctx, AV_LOG_ERROR, "First input link %s number of planes "
"(%d) do not match the corresponding "
"output link %s number of planes (%d)\n",
ctx->input_pads[0].name, s->nb_planesx,
ctx->output_pads[0].name, s->nb_planes);
return AVERROR(EINVAL);
}
if (s->widthx[1] != s->widthy[1] || s->heightx[1] != s->heighty[1]) {
av_log(ctx, AV_LOG_ERROR, "First input link %s 2nd plane "
"(size %dx%d) do not match the corresponding "
"second input link %s 2nd plane (size %dx%d)\n",
ctx->input_pads[0].name, s->widthx[1], s->heightx[1],
ctx->input_pads[1].name,
s->widthy[1], s->heighty[1]);
return AVERROR(EINVAL);
}
if (s->widthx[2] != s->widthy[2] || s->heightx[2] != s->heighty[2]) {
av_log(ctx, AV_LOG_ERROR, "First input link %s 3rd plane "
"(size %dx%d) do not match the corresponding "
"second input link %s 3rd plane (size %dx%d)\n",
ctx->input_pads[0].name, s->widthx[2], s->heightx[2],
ctx->input_pads[1].name,
s->widthy[2], s->heighty[2]);
return AVERROR(EINVAL);
}
if (s->widthx[1] != s->width[1] || s->heightx[1] != s->height[1]) {
av_log(ctx, AV_LOG_ERROR, "First input link %s 2nd plane "
"(size %dx%d) do not match the corresponding "
"output link %s 2nd plane (size %dx%d)\n",
ctx->input_pads[0].name, s->widthx[1], s->heightx[1],
ctx->output_pads[0].name, s->width[1], s->height[1]);
return AVERROR(EINVAL);
}
if (s->widthx[2] != s->width[2] || s->heightx[2] != s->height[2]) {
av_log(ctx, AV_LOG_ERROR, "First input link %s 3rd plane "
"(size %dx%d) do not match the corresponding "
"output link %s 3rd plane (size %dx%d)\n",
ctx->input_pads[0].name, s->widthx[2], s->heightx[2],
ctx->output_pads[0].name, s->width[2], s->height[2]);
return AVERROR(EINVAL);
}
if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
return ret;
in = s->fs.in;
in[0].time_base = srcx->time_base;
in[1].time_base = srcy->time_base;
in[0].sync = 2;
in[0].before = EXT_STOP;
in[0].after = EXT_INFINITY;
in[1].sync = 1;
in[1].before = EXT_STOP;
in[1].after = EXT_INFINITY;
s->fs.opaque = s;
s->fs.on_event = process_frame;
if ((ret = config_output(outlink)) < 0)
return ret;
ret = ff_framesync_configure(&s->fs);
outlink->time_base = s->fs.time_base;
return ret;
}
static int activate(AVFilterContext *ctx)
{
LUT2Context *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static const AVFilterPad inputs[] = {
{
.name = "srcx",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_inputx,
},
{
.name = "srcy",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_inputy,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = lut2_config_output,
},
{ NULL }
};
#define lut2_options options
FRAMESYNC_DEFINE_CLASS(lut2, LUT2Context, fs);
AVFilter ff_vf_lut2 = {
.name = "lut2",
.description = NULL_IF_CONFIG_SMALL("Compute and apply a lookup table from two video inputs."),
.preinit = lut2_framesync_preinit,
.priv_size = sizeof(LUT2Context),
.priv_class = &lut2_class,
.uninit = uninit,
.query_formats = query_formats,
.activate = activate,
.inputs = inputs,
.outputs = outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
};
#if CONFIG_TLUT2_FILTER
static av_cold int init(AVFilterContext *ctx)
{
LUT2Context *s = ctx->priv;
s->tlut2 = !strcmp(ctx->filter->name, "tlut2");
return 0;
}
static int tlut2_filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
LUT2Context *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
if (s->prev_frame) {
AVFrame *out;
if (ctx->is_disabled) {
out = av_frame_clone(frame);
} else {
ThreadData td;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&s->prev_frame);
s->prev_frame = frame;
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, frame);
td.out = out;
td.srcx = frame;
td.srcy = s->prev_frame;
ctx->internal->execute(ctx, s->lut2, &td, NULL, FFMIN(s->heightx[1], ff_filter_get_nb_threads(ctx)));
}
av_frame_free(&s->prev_frame);
s->prev_frame = frame;
return ff_filter_frame(outlink, out);
}
s->prev_frame = frame;
return 0;
}
static const AVOption tlut2_options[] = {
{ "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(tlut2);
static const AVFilterPad tlut2_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = tlut2_filter_frame,
.config_props = config_inputx,
},
{ NULL }
};
static const AVFilterPad tlut2_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_tlut2 = {
.name = "tlut2",
.description = NULL_IF_CONFIG_SMALL("Compute and apply a lookup table from two successive frames."),
.priv_size = sizeof(LUT2Context),
.priv_class = &tlut2_class,
.query_formats = query_formats,
.init = init,
.uninit = uninit,
.inputs = tlut2_inputs,
.outputs = tlut2_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
};
#endif