Re: [FFmpeg-devel] [PATCH] avfilter/lensfun: add option db_path

[Gyan Doshi <ffmpeg@gyani.pro>]

Plan to push tomorrow.

On 2022-04-10 11:36 am, Gyan Doshi wrote:
> The lensfun filter, at present, loads its database from a path hardcoded
> at build time. This may not be known or available to end users.
>
> Added option db_path allows custom path.
> ---
>   doc/filters.texi         | 4 ++++
>   libavfilter/vf_lensfun.c | 8 +++++---
>   2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/doc/filters.texi b/doc/filters.texi
> index 6a66b0ed11..9861f43c07 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -14693,6 +14693,10 @@ required.
>   The model of the lens (for example, "Canon EF-S 18-55mm f/3.5-5.6 IS STM"). This
>   option is required.
>   
> +@item db_path
> +The full path to the lens database folder. If not set, the filter will attempt to
> +load the database from the install path when the library was built. Default is unset.
> +
>   @item mode
>   The type of correction to apply. The following values are valid options:
>   
> diff --git a/libavfilter/vf_lensfun.c b/libavfilter/vf_lensfun.c
> index 596daed104..35c522a723 100644
> --- a/libavfilter/vf_lensfun.c
> +++ b/libavfilter/vf_lensfun.c
> @@ -73,7 +73,7 @@ typedef struct DistortionCorrectionThreadData {
>   
>   typedef struct LensfunContext {
>       const AVClass *class;
> -    const char *make, *model, *lens_model;
> +    const char *make, *model, *lens_model, *db_path;
>       int mode;
>       float focal_length;
>       float aperture;
> @@ -97,6 +97,7 @@ 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, "mode" },
>           { "vignetting", "fix lens vignetting", 0, AV_OPT_TYPE_CONST, {.i64=VIGNETTING}, 0, 0, FLAGS, "mode" },
>           { "geometry", "correct geometry distortion", 0, AV_OPT_TYPE_CONST, {.i64=GEOMETRY_DISTORTION}, 0, 0, FLAGS, "mode" },
> @@ -136,9 +137,10 @@ static av_cold int init(AVFilterContext *ctx)
>       const lfLens **lenses;
>   
>       db = lf_db_create();
> -    if (lf_db_load(db) != LF_NO_ERROR) {
> +    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\n");
> +        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;
>       }
>   

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