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FFmpeg/libavfilter/vf_lut2.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback 
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +02:00

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/*
* 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
#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption options[] = {
{ "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = TFLAGS },
{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = TFLAGS },
{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = TFLAGS },
{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = TFLAGS },
{ "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_YUVA422P12, AV_PIX_FMT_YUVA444P12, \
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_GRAY14, 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_from_list(ctx, all_pix_fmts);
ret = ff_formats_ref(ff_make_format_list(all_pix_fmts), &ctx->inputs[0]->outcfg.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]->incfg.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;
ff_filter_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++) {
if (!s->lut[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,
},
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = lut2_config_output,
},
};
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return config_output(ctx->outputs[0]);
}
#define lut2_options options
FRAMESYNC_DEFINE_CLASS(lut2, LUT2Context, fs);
const 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,
.activate = activate,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};
#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;
ff_filter_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 = TFLAGS },
{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = TFLAGS },
{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = TFLAGS },
{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = TFLAGS },
{ 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,
},
};
static const AVFilterPad tlut2_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const 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,
.init = init,
.uninit = uninit,
FILTER_INPUTS(tlut2_inputs),
FILTER_OUTPUTS(tlut2_outputs),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};
#endif
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