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FFmpeg/libavfilter/vf_lensfun.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* Copyright (C) 2007 by Andrew Zabolotny (author of lensfun, from which this filter derives from)
* Copyright (C) 2018 Stephen Seo
*
* This file is part of FFmpeg.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* @file
* Lensfun filter, applies lens correction with parameters from the lensfun database
*
* @see https://lensfun.sourceforge.net/
*/
#include <float.h>
#include <math.h>
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#include "video.h"
#include <lensfun.h>
#define LANCZOS_RESOLUTION 256
enum Mode {
VIGNETTING = 0x1,
GEOMETRY_DISTORTION = 0x2,
SUBPIXEL_DISTORTION = 0x4
};
enum InterpolationType {
NEAREST,
LINEAR,
LANCZOS
};
typedef struct VignettingThreadData {
int width, height;
uint8_t *data_in;
int linesize_in;
int pixel_composition;
lfModifier *modifier;
} VignettingThreadData;
typedef struct DistortionCorrectionThreadData {
int width, height;
const float *distortion_coords;
const uint8_t *data_in;
uint8_t *data_out;
int linesize_in, linesize_out;
const float *interpolation;
int mode;
int interpolation_type;
} DistortionCorrectionThreadData;
typedef struct LensfunContext {
const AVClass *class;
const char *make, *model, *lens_model, *db_path;
int mode;
float focal_length;
float aperture;
float focus_distance;
float scale;
int target_geometry;
int reverse;
int interpolation_type;
float *distortion_coords;
float *interpolation;
lfLens *lens;
lfCamera *camera;
lfModifier *modifier;
} LensfunContext;
#define OFFSET(x) offsetof(LensfunContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption lensfun_options[] = {
{ "make", "set camera maker", OFFSET(make), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ "model", "set camera model", OFFSET(model), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ "lens_model", "set lens model", OFFSET(lens_model), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ "db_path", "set path to database", OFFSET(db_path), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=GEOMETRY_DISTORTION}, 0, VIGNETTING | GEOMETRY_DISTORTION | SUBPIXEL_DISTORTION, FLAGS, .unit = "mode" },
{ "vignetting", "fix lens vignetting", 0, AV_OPT_TYPE_CONST, {.i64=VIGNETTING}, 0, 0, FLAGS, .unit = "mode" },
{ "geometry", "correct geometry distortion", 0, AV_OPT_TYPE_CONST, {.i64=GEOMETRY_DISTORTION}, 0, 0, FLAGS, .unit = "mode" },
{ "subpixel", "fix chromatic aberrations", 0, AV_OPT_TYPE_CONST, {.i64=SUBPIXEL_DISTORTION}, 0, 0, FLAGS, .unit = "mode" },
{ "vig_geo", "fix lens vignetting and correct geometry distortion", 0, AV_OPT_TYPE_CONST, {.i64=VIGNETTING | GEOMETRY_DISTORTION}, 0, 0, FLAGS, .unit = "mode" },
{ "vig_subpixel", "fix lens vignetting and chromatic aberrations", 0, AV_OPT_TYPE_CONST, {.i64=VIGNETTING | SUBPIXEL_DISTORTION}, 0, 0, FLAGS, .unit = "mode" },
{ "distortion", "correct geometry distortion and chromatic aberrations", 0, AV_OPT_TYPE_CONST, {.i64=GEOMETRY_DISTORTION | SUBPIXEL_DISTORTION}, 0, 0, FLAGS, .unit = "mode" },
{ "all", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VIGNETTING | GEOMETRY_DISTORTION | SUBPIXEL_DISTORTION}, 0, 0, FLAGS, .unit = "mode" },
{ "focal_length", "focal length of video (zoom; constant for the duration of the use of this filter)", OFFSET(focal_length), AV_OPT_TYPE_FLOAT, {.dbl=18}, 0.0, DBL_MAX, FLAGS },
{ "aperture", "aperture (constant for the duration of the use of this filter)", OFFSET(aperture), AV_OPT_TYPE_FLOAT, {.dbl=3.5}, 0.0, DBL_MAX, FLAGS },
{ "focus_distance", "focus distance (constant for the duration of the use of this filter)", OFFSET(focus_distance), AV_OPT_TYPE_FLOAT, {.dbl=1000.0f}, 0.0, DBL_MAX, FLAGS },
{ "scale", "scale factor applied after corrections (0.0 means automatic scaling)", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, DBL_MAX, FLAGS },
{ "target_geometry", "target geometry of the lens correction (only when geometry correction is enabled)", OFFSET(target_geometry), AV_OPT_TYPE_INT, {.i64=LF_RECTILINEAR}, 0, INT_MAX, FLAGS, .unit = "lens_geometry" },
{ "rectilinear", "rectilinear lens (default)", 0, AV_OPT_TYPE_CONST, {.i64=LF_RECTILINEAR}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "fisheye", "fisheye lens", 0, AV_OPT_TYPE_CONST, {.i64=LF_FISHEYE}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "panoramic", "panoramic (cylindrical)", 0, AV_OPT_TYPE_CONST, {.i64=LF_PANORAMIC}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "equirectangular", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=LF_EQUIRECTANGULAR}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "fisheye_orthographic", "orthographic fisheye", 0, AV_OPT_TYPE_CONST, {.i64=LF_FISHEYE_ORTHOGRAPHIC}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "fisheye_stereographic", "stereographic fisheye", 0, AV_OPT_TYPE_CONST, {.i64=LF_FISHEYE_STEREOGRAPHIC}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "fisheye_equisolid", "equisolid fisheye", 0, AV_OPT_TYPE_CONST, {.i64=LF_FISHEYE_EQUISOLID}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "fisheye_thoby", "fisheye as measured by thoby", 0, AV_OPT_TYPE_CONST, {.i64=LF_FISHEYE_THOBY}, 0, 0, FLAGS, .unit = "lens_geometry" },
{ "reverse", "Does reverse correction (regular image to lens distorted)", OFFSET(reverse), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "interpolation", "Type of interpolation", OFFSET(interpolation_type), AV_OPT_TYPE_INT, {.i64=LINEAR}, 0, LANCZOS, FLAGS, .unit = "interpolation" },
{ "nearest", NULL, 0, AV_OPT_TYPE_CONST, {.i64=NEAREST}, 0, 0, FLAGS, .unit = "interpolation" },
{ "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "interpolation" },
{ "lanczos", NULL, 0, AV_OPT_TYPE_CONST, {.i64=LANCZOS}, 0, 0, FLAGS, .unit = "interpolation" },
{ NULL }
};
AVFILTER_DEFINE_CLASS(lensfun);
static av_cold int init(AVFilterContext *ctx)
{
LensfunContext *lensfun = ctx->priv;
lfDatabase *db;
const lfCamera **cameras;
const lfLens **lenses;
db = lf_db_create();
if ((lensfun->db_path ? lf_db_load_path(db, lensfun->db_path) : lf_db_load(db)) != LF_NO_ERROR) {
lf_db_destroy(db);
av_log(ctx, AV_LOG_FATAL, "Failed to load lensfun database from %s path\n",
lensfun->db_path ? lensfun->db_path : "default");
return AVERROR_INVALIDDATA;
}
if (!lensfun->make || !lensfun->model) {
const lfCamera *const *cameras = lf_db_get_cameras(db);
av_log(ctx, AV_LOG_FATAL, "Option \"make\" or option \"model\" not specified\n");
av_log(ctx, AV_LOG_INFO, "Available values for \"make\" and \"model\":\n");
for (int i = 0; cameras && cameras[i]; i++)
av_log(ctx, AV_LOG_INFO, "\t%s\t%s\n", cameras[i]->Maker, cameras[i]->Model);
lf_db_destroy(db);
return AVERROR(EINVAL);
} else if (!lensfun->lens_model) {
const lfLens *const *lenses = lf_db_get_lenses(db);
av_log(ctx, AV_LOG_FATAL, "Option \"lens_model\" not specified\n");
av_log(ctx, AV_LOG_INFO, "Available values for \"lens_model\":\n");
for (int i = 0; lenses && lenses[i]; i++)
av_log(ctx, AV_LOG_INFO, "\t%s\t(make %s)\n", lenses[i]->Model, lenses[i]->Maker);
lf_db_destroy(db);
return AVERROR(EINVAL);
}
lensfun->lens = lf_lens_create();
lensfun->camera = lf_camera_create();
cameras = lf_db_find_cameras(db, lensfun->make, lensfun->model);
if (cameras && *cameras) {
lf_camera_copy(lensfun->camera, *cameras);
av_log(ctx, AV_LOG_INFO, "Using camera %s\n", lensfun->camera->Model);
} else {
lf_free(cameras);
lf_db_destroy(db);
av_log(ctx, AV_LOG_FATAL, "Failed to find camera in lensfun database\n");
return AVERROR_INVALIDDATA;
}
lf_free(cameras);
lenses = lf_db_find_lenses(db, lensfun->camera, NULL, lensfun->lens_model, 0);
if (lenses && *lenses) {
lf_lens_copy(lensfun->lens, *lenses);
av_log(ctx, AV_LOG_INFO, "Using lens %s\n", lensfun->lens->Model);
} else {
lf_free(lenses);
lf_db_destroy(db);
av_log(ctx, AV_LOG_FATAL, "Failed to find lens in lensfun database\n");
return AVERROR_INVALIDDATA;
}
lf_free(lenses);
lf_db_destroy(db);
return 0;
}
static float lanczos_kernel(float x)
{
if (x == 0.0f) {
return 1.0f;
} else if (x > -2.0f && x < 2.0f) {
return (2.0f * sin(M_PI * x) * sin(M_PI / 2.0f * x)) / (M_PI * M_PI * x * x);
} else {
return 0.0f;
}
}
static int config_props(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
LensfunContext *lensfun = ctx->priv;
int index;
float a;
if (!lensfun->modifier) {
if (lensfun->camera && lensfun->lens) {
lensfun->modifier = lf_modifier_create(lensfun->lens,
lensfun->focal_length,
lensfun->camera->CropFactor,
inlink->w,
inlink->h, LF_PF_U8, lensfun->reverse);
if (lensfun->mode & VIGNETTING)
lf_modifier_enable_vignetting_correction(lensfun->modifier, lensfun->aperture, lensfun->focus_distance);
if (lensfun->mode & GEOMETRY_DISTORTION) {
lf_modifier_enable_distortion_correction(lensfun->modifier);
lf_modifier_enable_projection_transform(lensfun->modifier, lensfun->target_geometry);
lf_modifier_enable_scaling(lensfun->modifier, lensfun->scale);
}
if (lensfun->mode & SUBPIXEL_DISTORTION)
lf_modifier_enable_tca_correction(lensfun->modifier);
} else {
// lensfun->camera and lensfun->lens should have been initialized
return AVERROR_BUG;
}
}
if (!lensfun->distortion_coords) {
if (lensfun->mode & SUBPIXEL_DISTORTION) {
lensfun->distortion_coords = av_malloc_array(inlink->w * inlink->h, sizeof(float) * 2 * 3);
if (!lensfun->distortion_coords)
return AVERROR(ENOMEM);
if (lensfun->mode & GEOMETRY_DISTORTION) {
// apply both geometry and subpixel distortion
lf_modifier_apply_subpixel_geometry_distortion(lensfun->modifier,
0, 0,
inlink->w, inlink->h,
lensfun->distortion_coords);
} else {
// apply only subpixel distortion
lf_modifier_apply_subpixel_distortion(lensfun->modifier,
0, 0,
inlink->w, inlink->h,
lensfun->distortion_coords);
}
} else if (lensfun->mode & GEOMETRY_DISTORTION) {
lensfun->distortion_coords = av_malloc_array(inlink->w * inlink->h, sizeof(float) * 2);
if (!lensfun->distortion_coords)
return AVERROR(ENOMEM);
// apply only geometry distortion
lf_modifier_apply_geometry_distortion(lensfun->modifier,
0, 0,
inlink->w, inlink->h,
lensfun->distortion_coords);
}
}
if (!lensfun->interpolation)
if (lensfun->interpolation_type == LANCZOS) {
lensfun->interpolation = av_malloc_array(LANCZOS_RESOLUTION, sizeof(float) * 4);
if (!lensfun->interpolation)
return AVERROR(ENOMEM);
for (index = 0; index < 4 * LANCZOS_RESOLUTION; ++index) {
if (index == 0) {
lensfun->interpolation[index] = 1.0f;
} else {
a = sqrtf((float)index / LANCZOS_RESOLUTION);
lensfun->interpolation[index] = lanczos_kernel(a);
}
}
}
return 0;
}
static int vignetting_filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
const VignettingThreadData *thread_data = arg;
const int slice_start = thread_data->height * jobnr / nb_jobs;
const int slice_end = thread_data->height * (jobnr + 1) / nb_jobs;
lf_modifier_apply_color_modification(thread_data->modifier,
thread_data->data_in + slice_start * thread_data->linesize_in,
0,
slice_start,
thread_data->width,
slice_end - slice_start,
thread_data->pixel_composition,
thread_data->linesize_in);
return 0;
}
static float square(float x)
{
return x * x;
}
static int distortion_correction_filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
const DistortionCorrectionThreadData *thread_data = arg;
const int slice_start = thread_data->height * jobnr / nb_jobs;
const int slice_end = thread_data->height * (jobnr + 1) / nb_jobs;
int x, y, i, j, rgb_index;
float interpolated, new_x, new_y, d, norm;
int new_x_int, new_y_int;
for (y = slice_start; y < slice_end; ++y)
for (x = 0; x < thread_data->width; ++x)
for (rgb_index = 0; rgb_index < 3; ++rgb_index) {
if (thread_data->mode & SUBPIXEL_DISTORTION) {
// subpixel (and possibly geometry) distortion correction was applied, correct distortion
switch(thread_data->interpolation_type) {
case NEAREST:
new_x_int = thread_data->distortion_coords[x * 2 * 3 + y * thread_data->width * 2 * 3 + rgb_index * 2] + 0.5f;
new_y_int = thread_data->distortion_coords[x * 2 * 3 + y * thread_data->width * 2 * 3 + rgb_index * 2 + 1] + 0.5f;
if (new_x_int < 0 || new_x_int >= thread_data->width || new_y_int < 0 || new_y_int >= thread_data->height) {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = 0;
} else {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = thread_data->data_in[new_x_int * 3 + rgb_index + new_y_int * thread_data->linesize_in];
}
break;
case LINEAR:
interpolated = 0.0f;
new_x = thread_data->distortion_coords[x * 2 * 3 + y * thread_data->width * 2 * 3 + rgb_index * 2];
new_x_int = new_x;
new_y = thread_data->distortion_coords[x * 2 * 3 + y * thread_data->width * 2 * 3 + rgb_index * 2 + 1];
new_y_int = new_y;
if (new_x_int < 0 || new_x_int + 1 >= thread_data->width || new_y_int < 0 || new_y_int + 1 >= thread_data->height) {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = 0;
} else {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] =
thread_data->data_in[ new_x_int * 3 + rgb_index + new_y_int * thread_data->linesize_in] * (new_x_int + 1 - new_x) * (new_y_int + 1 - new_y)
+ thread_data->data_in[(new_x_int + 1) * 3 + rgb_index + new_y_int * thread_data->linesize_in] * (new_x - new_x_int) * (new_y_int + 1 - new_y)
+ thread_data->data_in[ new_x_int * 3 + rgb_index + (new_y_int + 1) * thread_data->linesize_in] * (new_x_int + 1 - new_x) * (new_y - new_y_int)
+ thread_data->data_in[(new_x_int + 1) * 3 + rgb_index + (new_y_int + 1) * thread_data->linesize_in] * (new_x - new_x_int) * (new_y - new_y_int);
}
break;
case LANCZOS:
interpolated = 0.0f;
norm = 0.0f;
new_x = thread_data->distortion_coords[x * 2 * 3 + y * thread_data->width * 2 * 3 + rgb_index * 2];
new_x_int = new_x;
new_y = thread_data->distortion_coords[x * 2 * 3 + y * thread_data->width * 2 * 3 + rgb_index * 2 + 1];
new_y_int = new_y;
for (j = 0; j < 4; ++j)
for (i = 0; i < 4; ++i) {
if (new_x_int + i - 2 < 0 || new_x_int + i - 2 >= thread_data->width || new_y_int + j - 2 < 0 || new_y_int + j - 2 >= thread_data->height)
continue;
d = square(new_x - (new_x_int + i - 2)) * square(new_y - (new_y_int + j - 2));
if (d >= 4.0f)
continue;
d = thread_data->interpolation[(int)(d * LANCZOS_RESOLUTION)];
norm += d;
interpolated += thread_data->data_in[(new_x_int + i - 2) * 3 + rgb_index + (new_y_int + j - 2) * thread_data->linesize_in] * d;
}
if (norm == 0.0f) {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = 0;
} else {
interpolated /= norm;
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = interpolated < 0.0f ? 0.0f : interpolated > 255.0f ? 255.0f : interpolated;
}
break;
}
} else if (thread_data->mode & GEOMETRY_DISTORTION) {
// geometry distortion correction was applied, correct distortion
switch(thread_data->interpolation_type) {
case NEAREST:
new_x_int = thread_data->distortion_coords[x * 2 + y * thread_data->width * 2] + 0.5f;
new_y_int = thread_data->distortion_coords[x * 2 + y * thread_data->width * 2 + 1] + 0.5f;
if (new_x_int < 0 || new_x_int >= thread_data->width || new_y_int < 0 || new_y_int >= thread_data->height) {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = 0;
} else {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = thread_data->data_in[new_x_int * 3 + rgb_index + new_y_int * thread_data->linesize_in];
}
break;
case LINEAR:
interpolated = 0.0f;
new_x = thread_data->distortion_coords[x * 2 + y * thread_data->width * 2];
new_x_int = new_x;
new_y = thread_data->distortion_coords[x * 2 + y * thread_data->width * 2 + 1];
new_y_int = new_y;
if (new_x_int < 0 || new_x_int + 1 >= thread_data->width || new_y_int < 0 || new_y_int + 1 >= thread_data->height) {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = 0;
} else {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] =
thread_data->data_in[ new_x_int * 3 + rgb_index + new_y_int * thread_data->linesize_in] * (new_x_int + 1 - new_x) * (new_y_int + 1 - new_y)
+ thread_data->data_in[(new_x_int + 1) * 3 + rgb_index + new_y_int * thread_data->linesize_in] * (new_x - new_x_int) * (new_y_int + 1 - new_y)
+ thread_data->data_in[ new_x_int * 3 + rgb_index + (new_y_int + 1) * thread_data->linesize_in] * (new_x_int + 1 - new_x) * (new_y - new_y_int)
+ thread_data->data_in[(new_x_int + 1) * 3 + rgb_index + (new_y_int + 1) * thread_data->linesize_in] * (new_x - new_x_int) * (new_y - new_y_int);
}
break;
case LANCZOS:
interpolated = 0.0f;
norm = 0.0f;
new_x = thread_data->distortion_coords[x * 2 + y * thread_data->width * 2];
new_x_int = new_x;
new_y = thread_data->distortion_coords[x * 2 + 1 + y * thread_data->width * 2];
new_y_int = new_y;
for (j = 0; j < 4; ++j)
for (i = 0; i < 4; ++i) {
if (new_x_int + i - 2 < 0 || new_x_int + i - 2 >= thread_data->width || new_y_int + j - 2 < 0 || new_y_int + j - 2 >= thread_data->height)
continue;
d = square(new_x - (new_x_int + i - 2)) * square(new_y - (new_y_int + j - 2));
if (d >= 4.0f)
continue;
d = thread_data->interpolation[(int)(d * LANCZOS_RESOLUTION)];
norm += d;
interpolated += thread_data->data_in[(new_x_int + i - 2) * 3 + rgb_index + (new_y_int + j - 2) * thread_data->linesize_in] * d;
}
if (norm == 0.0f) {
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = 0;
} else {
interpolated /= norm;
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = interpolated < 0.0f ? 0.0f : interpolated > 255.0f ? 255.0f : interpolated;
}
break;
}
} else {
// no distortion correction was applied
thread_data->data_out[x * 3 + rgb_index + y * thread_data->linesize_out] = thread_data->data_in[x * 3 + rgb_index + y * thread_data->linesize_in];
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
LensfunContext *lensfun = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out;
VignettingThreadData vignetting_thread_data;
DistortionCorrectionThreadData distortion_correction_thread_data;
int ret;
if (lensfun->mode & VIGNETTING) {
ret = ff_inlink_make_frame_writable(inlink, &in);
if (ret < 0) {
av_frame_free(&in);
return ret;
}
vignetting_thread_data = (VignettingThreadData) {
.width = inlink->w,
.height = inlink->h,
.data_in = in->data[0],
.linesize_in = in->linesize[0],
.pixel_composition = LF_CR_3(RED, GREEN, BLUE),
.modifier = lensfun->modifier
};
ff_filter_execute(ctx, vignetting_filter_slice,
&vignetting_thread_data, NULL,
FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
}
if (lensfun->mode & (GEOMETRY_DISTORTION | SUBPIXEL_DISTORTION)) {
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);
distortion_correction_thread_data = (DistortionCorrectionThreadData) {
.width = inlink->w,
.height = inlink->h,
.distortion_coords = lensfun->distortion_coords,
.data_in = in->data[0],
.data_out = out->data[0],
.linesize_in = in->linesize[0],
.linesize_out = out->linesize[0],
.interpolation = lensfun->interpolation,
.mode = lensfun->mode,
.interpolation_type = lensfun->interpolation_type
};
ff_filter_execute(ctx, distortion_correction_filter_slice,
&distortion_correction_thread_data, NULL,
FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
av_frame_free(&in);
return ff_filter_frame(outlink, out);
} else {
return ff_filter_frame(outlink, in);
}
}
static av_cold void uninit(AVFilterContext *ctx)
{
LensfunContext *lensfun = ctx->priv;
if (lensfun->camera)
lf_camera_destroy(lensfun->camera);
if (lensfun->lens)
lf_lens_destroy(lensfun->lens);
if (lensfun->modifier)
lf_modifier_destroy(lensfun->modifier);
av_freep(&lensfun->distortion_coords);
av_freep(&lensfun->interpolation);
}
static const AVFilterPad lensfun_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props,
.filter_frame = filter_frame,
},
};
const AVFilter ff_vf_lensfun = {
.name = "lensfun",
.description = NULL_IF_CONFIG_SMALL("Apply correction to an image based on info derived from the lensfun database."),
.priv_size = sizeof(LensfunContext),
.init = init,
.uninit = uninit,
FILTER_INPUTS(lensfun_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_RGB24),
.priv_class = &lensfun_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
};
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