From 4b32d51b962bc1950a7efeacdcfce5c45716bb67 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Sat, 21 Apr 2018 13:18:03 +0200
Subject: f_output_chain: log status of auto filters

Just so users don't think the filters do anything when they don't insert
any filters.
---
 filters/f_auto_filters.c | 29 +++++++++++++++++++++++++++++
 filters/f_autoconvert.c  |  5 +++++
 filters/f_output_chain.c | 10 ++++++++++
 filters/filter.h         |  4 ++++
 4 files changed, 48 insertions(+)

diff --git a/filters/f_auto_filters.c b/filters/f_auto_filters.c
index 8071cb3712..3d4b650dd6 100644
--- a/filters/f_auto_filters.c
+++ b/filters/f_auto_filters.c
@@ -106,9 +106,21 @@ static void deint_destroy(struct mp_filter *f)
     TA_FREEP(&p->sub.filter);
 }
 
+static bool deint_command(struct mp_filter *f, struct mp_filter_command *cmd)
+{
+    struct deint_priv *p = f->priv;
+
+    if (cmd->type == MP_FILTER_COMMAND_IS_ACTIVE) {
+        cmd->is_active = !!p->sub.filter;
+        return true;
+    }
+    return false;
+}
+
 static const struct mp_filter_info deint_filter = {
     .name = "deint",
     .priv_size = sizeof(struct deint_priv),
+    .command = deint_command,
     .process = deint_process,
     .reset = deint_reset,
     .destroy = deint_destroy,
@@ -220,9 +232,21 @@ static void rotate_destroy(struct mp_filter *f)
     TA_FREEP(&p->sub.filter);
 }
 
+static bool rotate_command(struct mp_filter *f, struct mp_filter_command *cmd)
+{
+    struct rotate_priv *p = f->priv;
+
+    if (cmd->type == MP_FILTER_COMMAND_IS_ACTIVE) {
+        cmd->is_active = !!p->sub.filter;
+        return true;
+    }
+    return false;
+}
+
 static const struct mp_filter_info rotate_filter = {
     .name = "autorotate",
     .priv_size = sizeof(struct rotate_priv),
+    .command = rotate_command,
     .process = rotate_process,
     .reset = rotate_reset,
     .destroy = rotate_destroy,
@@ -291,6 +315,11 @@ static bool aspeed_command(struct mp_filter *f, struct mp_filter_command *cmd)
         return true;
     }
 
+    if (cmd->type == MP_FILTER_COMMAND_IS_ACTIVE) {
+        cmd->is_active = !!p->sub.filter;
+        return true;
+    }
+
     return false;
 }
 
diff --git a/filters/f_autoconvert.c b/filters/f_autoconvert.c
index 6d53a5dce3..b441a2b50d 100644
--- a/filters/f_autoconvert.c
+++ b/filters/f_autoconvert.c
@@ -418,6 +418,11 @@ static bool command(struct mp_filter *f, struct mp_filter_command *cmd)
         return true;
     }
 
+    if (cmd->type == MP_FILTER_COMMAND_IS_ACTIVE) {
+        cmd->is_active = !!p->sub.filter;
+        return true;
+    }
+
     return false;
 }
 
diff --git a/filters/f_output_chain.c b/filters/f_output_chain.c
index 00d5e75faf..3b96f4a0a5 100644
--- a/filters/f_output_chain.c
+++ b/filters/f_output_chain.c
@@ -66,6 +66,8 @@ struct mp_user_filter {
     struct mp_image_params last_in_vformat;
     struct mp_aframe *last_in_aformat;
 
+    bool last_is_active;
+
     int64_t last_in_pts, last_out_pts;
 
     bool failed;
@@ -198,6 +200,13 @@ static void process_user(struct mp_filter *f)
             u->last_out_pts = pts;
 
         mp_pin_in_write(f->ppins[1], frame);
+
+        struct mp_filter_command cmd = {.type = MP_FILTER_COMMAND_IS_ACTIVE};
+        if (mp_filter_command(u->f, &cmd) && u->last_is_active != cmd.is_active) {
+            u->last_is_active = cmd.is_active;
+            MP_VERBOSE(p, "[%s] (%sabled)\n", u->name,
+                       u->last_is_active ? "en" : "dis");
+        }
     }
 }
 
@@ -236,6 +245,7 @@ static struct mp_user_filter *create_wrapper_filter(struct chain *p)
     wrapper->wrapper = f;
     wrapper->p = p;
     wrapper->last_in_aformat = talloc_steal(wrapper, mp_aframe_create());
+    wrapper->last_is_active = true;
     mp_filter_add_pin(f, MP_PIN_IN, "in");
     mp_filter_add_pin(f, MP_PIN_OUT, "out");
     return wrapper;
diff --git a/filters/filter.h b/filters/filter.h
index 33177444c2..5e09a17ee7 100644
--- a/filters/filter.h
+++ b/filters/filter.h
@@ -357,6 +357,7 @@ enum mp_filter_command_type {
     MP_FILTER_COMMAND_GET_META,
     MP_FILTER_COMMAND_SET_SPEED,
     MP_FILTER_COMMAND_SET_SPEED_RESAMPLE,
+    MP_FILTER_COMMAND_IS_ACTIVE,
 };
 
 struct mp_filter_command {
@@ -371,6 +372,9 @@ struct mp_filter_command {
 
     // For MP_FILTER_COMMAND_SET_SPEED and MP_FILTER_COMMAND_SET_SPEED_RESAMPLE
     double speed;
+
+    // For MP_FILTER_COMMAND_IS_ACTIVE
+    bool is_active;
 };
 
 // Run a command on the filter. Returns success. For libavfilter.
-- 
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