From 25626ad96a9dd9719ec60a9e467c7399155c2a08 Mon Sep 17 00:00:00 2001
From: Quentin Renard <contact-github@asticode.com>
Date: Mon, 23 Dec 2024 15:33:57 +0100
Subject: [PATCH] Added filter flags

---
 filter.go                  |  5 +++++
 filter_flag.go             | 18 ++++++++++++++++++
 filter_test.go             |  1 +
 flags.go                   | 20 ++++++++++++++++++++
 flags_test.go              |  9 +++++++++
 internal/cmd/flags/main.go |  1 +
 6 files changed, 54 insertions(+)
 create mode 100644 filter_flag.go

diff --git a/filter.go b/filter.go
index 512899b..86b7342 100644
--- a/filter.go
+++ b/filter.go
@@ -25,6 +25,11 @@ func FindFilterByName(n string) *Filter {
 	return newFilterFromC(C.avfilter_get_by_name(cn))
 }
 
+// https://ffmpeg.org/doxygen/7.0/structAVFilter.html#a632c76418742ad4f4dccbd4db40badd0
+func (f *Filter) Flags() FilterFlags {
+	return FilterFlags(f.c.flags)
+}
+
 // https://ffmpeg.org/doxygen/7.0/structAVFilter.html#a28a4776f344f91055f42a4c2a1b15c0c
 func (f *Filter) Name() string {
 	return C.GoString(f.c.name)
diff --git a/filter_flag.go b/filter_flag.go
new file mode 100644
index 0000000..83eccb3
--- /dev/null
+++ b/filter_flag.go
@@ -0,0 +1,18 @@
+package astiav
+
+//#include <libavfilter/avfilter.h>
+import "C"
+
+// https://ffmpeg.org/doxygen/7.0/group__lavfi.html#gae6ed6c10a03508829bdf17560e3e10e5
+type FilterFlag int64
+
+const (
+	FilterFlagDynamicInputs           = FilterFlag(C.AVFILTER_FLAG_DYNAMIC_INPUTS)
+	FilterFlagDynamicOutputs          = FilterFlag(C.AVFILTER_FLAG_DYNAMIC_OUTPUTS)
+	FilterFlagSliceThreads            = FilterFlag(C.AVFILTER_FLAG_SLICE_THREADS)
+	FilterFlagMetadataOnly            = FilterFlag(C.AVFILTER_FLAG_METADATA_ONLY)
+	FilterFlagHardwareDevice          = FilterFlag(C.AVFILTER_FLAG_HWDEVICE)
+	FilterFlagSupportTimelineGeneric  = FilterFlag(C.AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC)
+	FilterFlagSupportTimelineInternal = FilterFlag(C.AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL)
+	FilterFlagSupportTimeline         = FilterFlag(C.AVFILTER_FLAG_SUPPORT_TIMELINE)
+)
diff --git a/filter_test.go b/filter_test.go
index 82c7e50..63a2478 100644
--- a/filter_test.go
+++ b/filter_test.go
@@ -11,4 +11,5 @@ func TestFilter(t *testing.T) {
 	require.NotNil(t, f)
 	require.Equal(t, "format", f.Name())
 	require.Equal(t, "format", f.String())
+	require.True(t, f.Flags().Has(FilterFlagMetadataOnly))
 }
diff --git a/flags.go b/flags.go
index 30cd6c9..8d64cf2 100644
--- a/flags.go
+++ b/flags.go
@@ -125,6 +125,26 @@ func (fs DictionaryFlags) Del(f DictionaryFlag) DictionaryFlags {
 
 func (fs DictionaryFlags) Has(f DictionaryFlag) bool { return astikit.BitFlags(fs).Has(uint64(f)) }
 
+type FilterFlags astikit.BitFlags
+
+func NewFilterFlags(fs ...FilterFlag) FilterFlags {
+	o := FilterFlags(0)
+	for _, f := range fs {
+		o = o.Add(f)
+	}
+	return o
+}
+
+func (fs FilterFlags) Add(f FilterFlag) FilterFlags {
+	return FilterFlags(astikit.BitFlags(fs).Add(uint64(f)))
+}
+
+func (fs FilterFlags) Del(f FilterFlag) FilterFlags {
+	return FilterFlags(astikit.BitFlags(fs).Del(uint64(f)))
+}
+
+func (fs FilterFlags) Has(f FilterFlag) bool { return astikit.BitFlags(fs).Has(uint64(f)) }
+
 type FilterCommandFlags astikit.BitFlags
 
 func NewFilterCommandFlags(fs ...FilterCommandFlag) FilterCommandFlags {
diff --git a/flags_test.go b/flags_test.go
index 2aaa75c..ce93e69 100644
--- a/flags_test.go
+++ b/flags_test.go
@@ -60,6 +60,15 @@ func TestDictionaryFlags(t *testing.T) {
 	require.False(t, fs.Has(DictionaryFlag(2)))
 }
 
+func TestFilterFlags(t *testing.T) {
+	fs := NewFilterFlags(FilterFlag(1))
+	require.True(t, fs.Has(FilterFlag(1)))
+	fs = fs.Add(FilterFlag(2))
+	require.True(t, fs.Has(FilterFlag(2)))
+	fs = fs.Del(FilterFlag(2))
+	require.False(t, fs.Has(FilterFlag(2)))
+}
+
 func TestFilterCommandFlags(t *testing.T) {
 	fs := NewFilterCommandFlags(FilterCommandFlag(1))
 	require.True(t, fs.Has(FilterCommandFlag(1)))
diff --git a/internal/cmd/flags/main.go b/internal/cmd/flags/main.go
index 72172c6..b710a45 100644
--- a/internal/cmd/flags/main.go
+++ b/internal/cmd/flags/main.go
@@ -20,6 +20,7 @@ var list = []listItem{
 	{Name: "CodecContext", Suffix: "2"},
 	{Name: "CodecHardwareConfigMethod"},
 	{Name: "Dictionary"},
+	{Name: "Filter"},
 	{Name: "FilterCommand"},
 	{Name: "FormatContext"},
 	{Name: "FormatContextCtx"},