From 89e608e16953ddcf3167035c6a4833ca49c29e90 Mon Sep 17 00:00:00 2001
From: Niklas Haas <git@haasn.dev>
Date: Wed, 13 Dec 2023 14:38:26 +0100
Subject: [PATCH] vo_gpu_next: add dynamic hook parameters

Fixes: https://github.com/haasn/libplacebo/issues/230
Fixes: https://github.com/mpv-player/mpv/issues/8206
---
 video/out/vo_gpu_next.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/video/out/vo_gpu_next.c b/video/out/vo_gpu_next.c
index c1e1450576..7fc1ff6d60 100644
--- a/video/out/vo_gpu_next.c
+++ b/video/out/vo_gpu_next.c
@@ -913,6 +913,9 @@ static void update_tm_viz(struct pl_color_map_params *params,
     params->visualize_hue = M_PI / 4.0;
 }
 
+static void update_hook_opts_dynamic(struct priv *p, const struct pl_hook *hook,
+                                     const struct mp_image *mpi);
+
 static void draw_frame(struct vo *vo, struct vo_frame *frame)
 {
     struct priv *p = vo->priv;
@@ -1118,6 +1121,10 @@ static void draw_frame(struct vo *vo, struct vo_frame *frame)
             // temporary memory that is only valid for this `pl_queue_update`.
             ((uint64_t *) mix.signatures)[i] ^= fp->osd_sync << 48;
         }
+
+        // Update dynamic hook parameters
+        for (int i = 0; i < pars->params.num_hooks; i++)
+            update_hook_opts_dynamic(p, p->hooks[i], frame->current);
     }
 
     // Render frame
@@ -2070,6 +2077,28 @@ static void update_lut(struct priv *p, struct user_lut *lut)
     talloc_free(lutdata.start);
 }
 
+static void update_hook_opts_dynamic(struct priv *p, const struct pl_hook *hook,
+                                     const struct mp_image *mpi)
+{
+    const struct { const char *name; double value; } opts[] = {
+        { "PTS", mpi->pts },
+    };
+
+    for (int i = 0; i < hook->num_parameters; i++) {
+        const struct pl_hook_par *hp = &hook->parameters[i];
+        for (int n = 0; n < MP_ARRAY_SIZE(opts); n++) {
+            if (strcmp(hp->name, opts[n].name) != 0)
+                continue;
+
+            switch (hp->type) {
+                case PL_VAR_FLOAT: hp->data->f = opts[n].value; break;
+                case PL_VAR_SINT:  hp->data->i = round(opts[n].value); break;
+                case PL_VAR_UINT:  hp->data->u = round(opts[n].value); break;
+            }
+        }
+    }
+}
+
 static void update_hook_opts(struct priv *p, char **opts, const char *shaderpath,
                              const struct pl_hook *hook)
 {