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avfilter/vf_libplacebo: add shader_cache option

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Useful to speed up shader compilation. May significantly lower startup
times, in particular with large or complex shaders.

Sponsored-by: nxtedition
This commit is contained in:
Niklas Haas
2025-05-14 15:16:50 +02:00
parent 4f623b4c59
commit 559317cc13
2 changed files with 41 additions and 0 deletions
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12
doc/filters.texi
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@@ -16321,6 +16321,18 @@ to double the input image resolution:
-vf "libplacebo=w=iw*2:h=ih*2:extra_opts='upscaler=custom\:upscaler_preset=ewa_lanczos\:upscaler_blur=0.9812505644269356'"
@end example
@item shader_cache
File path of a cache directory that libplacebo will use to store and load
cached shader objects. This cache is not cleaned up automatically. If the
path does not end in a directory separator, the generated filenames will be
effectively prefixed by the last path component. All directories must already
exist.
@example
-vf "libplacebo=shader_cache=/tmp/pl-shader-"
@end example
@item colorspace
@item color_primaries
@item color_trc

29
libavfilter/vf_libplacebo.c
View File

@@ -196,6 +196,11 @@ typedef struct LibplaceboContext {
int rotation;
AVDictionary *extra_opts;
#if PL_API_VER >= 351
pl_cache cache;
char *shader_cache;
#endif
int have_hwdevice;
/* pl_render_params */
@@ -523,6 +528,21 @@ static int libplacebo_init(AVFilterContext *avctx)
return AVERROR(ENOMEM);
}
#if PL_API_VER >= 351
if (s->shader_cache && s->shader_cache[0]) {
s->cache = pl_cache_create(pl_cache_params(
.log = s->log,
.get = pl_cache_get_file,
.set = pl_cache_set_file,
.priv = s->shader_cache,
));
if (!s->cache) {
libplacebo_uninit(avctx);
return AVERROR(ENOMEM);
}
}
#endif
if (s->out_format_string) {
s->out_format = av_get_pix_fmt(s->out_format_string);
if (s->out_format == AV_PIX_FMT_NONE) {
@@ -677,6 +697,9 @@ static int init_vulkan(AVFilterContext *avctx, const AVVulkanDeviceContext *hwct
}
s->gpu = s->vulkan->gpu;
#if PL_API_VER >= 351
pl_gpu_set_cache(s->gpu, s->cache);
#endif
/* Parse the user shaders, if requested */
if (s->shader_bin_len)
@@ -715,6 +738,9 @@ static void libplacebo_uninit(AVFilterContext *avctx)
av_freep(&s->inputs);
}
#if PL_API_VER >= 351
pl_cache_destroy(&s->cache);
#endif
pl_options_free(&s->opts);
pl_vulkan_destroy(&s->vulkan);
pl_log_destroy(&s->log);
@@ -1344,6 +1370,9 @@ static const AVOption libplacebo_options[] = {
{ "fillcolor", "Background fill color", OFFSET(fillcolor), AV_OPT_TYPE_COLOR, {.str = "black@0"}, .flags = DYNAMIC },
{ "corner_rounding", "Corner rounding radius", OFFSET(corner_rounding), AV_OPT_TYPE_FLOAT, {.dbl = 0.0}, 0.0, 1.0, .flags = DYNAMIC },
{ "extra_opts", "Pass extra libplacebo-specific options using a :-separated list of key=value pairs", OFFSET(extra_opts), AV_OPT_TYPE_DICT, .flags = DYNAMIC },
#if PL_API_VER >= 351
{ "shader_cache", "Set shader cache path", OFFSET(shader_cache), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = STATIC },
#endif
{"colorspace", "select colorspace", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_SPC_NB-1, DYNAMIC, .unit = "colorspace"},
{"auto", "keep the same colorspace", 0, AV_OPT_TYPE_CONST, {.i64=-1}, INT_MIN, INT_MAX, STATIC, .unit = "colorspace"},