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fix appsrc example

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RSWilli
2025-09-16 22:36:07 +02:00
parent 2c6d87b1f3
commit 003d2c3e89
3 changed files with 10 additions and 281 deletions
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9
examples/appsrc/main.go
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@@ -43,10 +43,11 @@ func createPipeline() (gst.Pipeline, error) {
videoInfo.SetFramerate(2, 1) videoInfo.SetFramerate(2, 1)
ok = src.SetCaps(videoInfo.ToCaps()) caps := videoInfo.ToCaps()
if !ok {
return nil, fmt.Errorf("failed to set caps on appsrc") fmt.Println("Caps:", caps.String())
}
src.SetObjectProperty("caps", caps)
src.SetObjectProperty("format", gst.FormatTime) src.SetObjectProperty("format", gst.FormatTime)
// Initialize a frame counter // Initialize a frame counter

278
generator.go
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@@ -12,7 +12,6 @@ import (
"github.com/diamondburned/gotk4/gir" "github.com/diamondburned/gotk4/gir"
"github.com/diamondburned/gotk4/gir/cmd/gir-generate/gendata" "github.com/diamondburned/gotk4/gir/cmd/gir-generate/gendata"
"github.com/diamondburned/gotk4/gir/cmd/gir-generate/genmain" "github.com/diamondburned/gotk4/gir/cmd/gir-generate/genmain"
"github.com/diamondburned/gotk4/gir/girgen"
"github.com/diamondburned/gotk4/gir/girgen/file" "github.com/diamondburned/gotk4/gir/girgen/file"
"github.com/diamondburned/gotk4/gir/girgen/generators" "github.com/diamondburned/gotk4/gir/girgen/generators"
"github.com/diamondburned/gotk4/gir/girgen/strcases" "github.com/diamondburned/gotk4/gir/girgen/strcases"
@@ -103,6 +102,9 @@ var Data = genmain.Overlay(
// during init // during init
t.GLibGetType = "" t.GLibGetType = ""
}), }),
// String() is more go like than ToString()
types.RenameCallable("Gst-1.Caps.to_string", "string"),
}, },
Config: typesystem.Config{ Config: typesystem.Config{
Namespaces: map[string]typesystem.NamespaceConfig{ Namespaces: map[string]typesystem.NamespaceConfig{
@@ -317,277 +319,3 @@ func (g *GstUseUnstableAPI) Generate(w *file.Package) {
} }
var _ generators.Generator = &GstUseUnstableAPI{} var _ generators.Generator = &GstUseUnstableAPI{}
func FixWebrtcPkgConfig(nsgen *girgen.NamespaceGenerator) error {
// see: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8433, remove after release
nsgen.Namespace().Repository.Packages = append(nsgen.Namespace().Repository.Packages, gir.Package{
Name: "gstreamer-sdp-1.0",
})
for _, f := range nsgen.Files {
// see https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8470 , remove after release
f.Header().IncludeC("gst/webrtc/sctptransport.h")
}
return nil
}
func IteratorValues(nsgen *girgen.NamespaceGenerator) error {
fg := nsgen.MakeFile("iteratorvalues.go")
p := fg.Pen()
fg.Header().Import("iter")
p.Line(`
// Values allows you to access the values from the iterator in a go for loop via function iterators
func (it *Iterator) Values() iter.Seq[any] {
return func(yield func(any) bool) {
for {
v, ret := it.Next()
switch ret {
case IteratorDone:
return
case IteratorResync:
it.Resync()
case IteratorOK:
if !yield(v.GoValue()) {
return
}
case IteratorError:
panic("iterator values failed")
default:
panic("iterator values returned unknown state")
}
}
}
}
`)
return nil
}
func StructureGoMarshal(nsgen *girgen.NamespaceGenerator) error {
fg := nsgen.MakeFile("structuremarshal.go")
p := fg.Pen()
fg.Header().NeedsExternGLib()
fg.Header().Import("reflect")
p.Line(`
// MarshalStructure will convert the given go struct into a GstStructure. Currently nested
// structs are not supported. You can control the mapping of the field names via the tags of the go struct.
func MarshalStructure(data interface{}) *Structure {
typeOf := reflect.TypeOf(data)
valsOf := reflect.ValueOf(data)
st := NewStructureEmpty(typeOf.Name())
for i := 0; i < valsOf.NumField(); i++ {
gval := valsOf.Field(i).Interface()
fieldName, ok := typeOf.Field(i).Tag.Lookup("gst")
if !ok {
fieldName = typeOf.Field(i).Name
}
st.SetValue(fieldName, coreglib.NewValue(gval))
}
return st
}
// UnmarshalInto will unmarshal this structure into the given pointer. The object
// reflected by the pointer must be non-nil. You can control the mapping of the field names via the tags of the go struct.
func (s *Structure) UnmarshalInto(data interface{}) error {
rv := reflect.ValueOf(data)
if rv.Kind() != reflect.Ptr || rv.IsNil() {
return fmt.Errorf("data is invalid (nil or non-pointer)")
}
val := reflect.ValueOf(data).Elem()
nVal := rv.Elem()
for i := 0; i < val.NumField(); i++ {
nvField := nVal.Field(i)
fieldName, ok := val.Type().Field(i).Tag.Lookup("gst")
if !ok {
fieldName = val.Type().Field(i).Name
}
val := s.Value(fieldName)
nvField.Set(reflect.ValueOf(val))
}
return nil
}
`)
return nil
}
func BinAddMany(nsgen *girgen.NamespaceGenerator) error {
fg := nsgen.MakeFile("binaddmany.go")
p := fg.Pen()
p.Line(`
// AddMany repeatedly calls Add for each param
func (bin *Bin) AddMany(elements... Elementer) bool {
for _, el := range elements {
if !bin.Add(el) {
return false
}
}
return true
}
`)
return nil
}
func ElementLinkMany(nsgen *girgen.NamespaceGenerator) error {
fg := nsgen.MakeFile("elementlinkmany.go")
p := fg.Pen()
p.Line(`
// LinkMany links the given elements in the order passed
func LinkMany(elements... Elementer) bool {
if len(elements) == 0 {
return true
}
current := elements[0].(*Element)
for _, next := range elements[1:] {
if ! current.Link(next) {
return false
}
current = next.(*Element)
}
return true
}
`)
return nil
}
func ElementBlockSetState(nsgen *girgen.NamespaceGenerator) error {
fg := nsgen.MakeFile("elementblocksetstate.go")
p := fg.Pen()
p.Line(`
// BlockSetState is a convenience wrapper around calling SetState and State to wait for async state changes. See State for more info.
func (el *Element) BlockSetState(state State, timeout ClockTime) StateChangeReturn {
ret := el.SetState(state)
if ret == StateChangeAsync {
_, _, ret = el.State(timeout)
}
return ret
}
`)
return nil
}
func ElementFactoryMakeWithProperties(nsgen *girgen.NamespaceGenerator) error {
fg := nsgen.MakeFile("elementfactory.go")
fg.Header().NeedsExternGLib()
p := fg.Pen()
// this is adapted from the autogenerated code and the coreglib.NewObjectWithProperties
p.Line(`
// ElementFactoryMakeWithProperties: create a new element of the type defined by
// the given elementfactory. The supplied list of properties, will be passed at
// object construction.
//
// The function takes the following parameters:
//
// - factoryname: named factory to instantiate.
// - names (optional): array of properties names.
// - values (optional): array of associated properties values.
//
// The function returns the following values:
//
// - element (optional): new Element or NULL if the element couldn't be
// created.
func ElementFactoryMakeWithProperties(factoryname string, properties map[string]any) Elementer {
var _arg1 *C.gchar // out
var _arg2 C.guint
var _cret *C.GstElement // in
_arg1 = (*C.gchar)(unsafe.Pointer(C.CString(factoryname)))
defer C.free(unsafe.Pointer(_arg1))
var names_ **C.gchar
var values_ *C.GValue
if len(properties) > 0 {
names := make([]*C.char, 0, len(properties))
values := make([]C.GValue, 0, len(properties))
for name, value := range properties {
cname := (*C.char)(C.CString(name))
defer C.free(unsafe.Pointer(cname))
gvalue := coreglib.NewValue(value)
defer runtime.KeepAlive(gvalue)
names = append(names, cname)
values = append(values, *(*C.GValue)(unsafe.Pointer(gvalue.Native())))
}
names_ = &names[0]
values_ = &values[0]
}
_cret = C.gst_element_factory_make_with_properties(_arg1, _arg2, names_, values_)
runtime.KeepAlive(factoryname)
var _element Elementer // out
if _cret != nil {
{
objptr := unsafe.Pointer(_cret)
object := coreglib.Take(objptr)
casted := object.WalkCast(func(obj coreglib.Objector) bool {
_, ok := obj.(Elementer)
return ok
})
rv, ok := casted.(Elementer)
if !ok {
panic("no marshaler for " + object.TypeFromInstance().String() + " matching gst.Elementer")
}
_element = rv
}
}
return _element
}`)
return nil
}
var ExtraGoContents = map[string]string{
"gst/gst.go": `
// Init binds to the gst_init() function. Argument parsing is not
// supported.
func Init() {
C.gst_init(nil, nil)
}
// ClockTimeNone means infinite timeout or an empty value
const ClockTimeNone ClockTime = 0xffffffffffffffff // Ideally this would be set to C.GST_CLOCK_TIME_NONE but this causes issues on MacOS and Windows
`,
}

4
pkg/gst/gst.gen.go
View File

@@ -40830,7 +40830,7 @@ func (minuend *Caps) Subtract(subtrahend *Caps) *Caps {
return goret return goret
} }
// ToString wraps gst_caps_to_string // String wraps gst_caps_to_string
// //
// The function returns the following values: // The function returns the following values:
// //
@@ -40849,7 +40849,7 @@ func (minuend *Caps) Subtract(subtrahend *Caps) *Caps {
// //
// The implementation of serialization up to 1.20 would lead to unexpected results // The implementation of serialization up to 1.20 would lead to unexpected results
// when there were nested #GstCaps / #GstStructure deeper than one level. // when there were nested #GstCaps / #GstStructure deeper than one level.
func (caps *Caps) ToString() string { func (caps *Caps) String() string {
var carg0 *C.GstCaps // in, none, converted var carg0 *C.GstCaps // in, none, converted
var cret *C.gchar // return, full, string var cret *C.gchar // return, full, string