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subclassing working! regenerate with gotk4

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This commit is contained in:
RSWilli
2025-09-16 22:36:08 +02:00
parent e5a18b1d12
commit 517e791e33
29 changed files with 7992 additions and 2720 deletions
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20
examples/plugins/registered_elements/internal/custombin/element.go
View File

@@ -6,6 +6,22 @@ import (
"github.com/go-gst/go-gst/pkg/gst"
)
func classInit(class *gst.BinClass) {
class.ParentClass().SetStaticMetadata(
"custom test source",
"Src/Test",
"Demo source bin with volume",
"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
)
class.ParentClass().AddPadTemplate(gst.NewPadTemplate(
"src",
gst.PadSrc,
gst.PadAlways,
gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
))
}
type customBin struct {
gst.BinInstance // parent object must be first embedded field
source1 gst.Element
@@ -15,11 +31,11 @@ type customBin struct {
// constructed is the method we use to override the GOBject.constructed method.
func (bin *customBin) constructed() {
bin.source1 = gst.ElementFactoryMakeWithProperties("gocustomsrc", map[string]interface{}{
bin.source1 = gst.ElementFactoryMakeWithProperties("gocustomsrc", map[string]any{
"duration": int64(5 * time.Second),
})
bin.source2 = gst.ElementFactoryMakeWithProperties("gocustomsrc", map[string]interface{}{
bin.source2 = gst.ElementFactoryMakeWithProperties("gocustomsrc", map[string]any{
"duration": int64(10 * time.Second),
})

9
examples/plugins/registered_elements/internal/custombin/register.go
View File

@@ -10,14 +10,7 @@ import (
func Register() bool {
registered := gst.RegisterBinSubClass[*customBin](
"gocustombin",
func(class *gst.BinClass) {
class.ParentClass().SetStaticMetadata(
"custom test source",
"Src/Test",
"Demo source bin with volume",
"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
)
},
classInit,
nil,
gst.BinOverrides[*customBin]{
ElementOverrides: gst.ElementOverrides[*customBin]{

51
examples/plugins/registered_elements/internal/customsrc/element.go
View File

@@ -1,6 +1,8 @@
package customsrc
import (
"fmt"
"log"
"math"
"time"
@@ -13,6 +15,33 @@ const samplesperbuffer = 4800
const samplerate = 48000
func classInit(class *gst.BinClass) {
class.ParentClass().SetStaticMetadata(
"custom test source",
"Src/Test",
"Demo source bin with volume",
"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
)
class.ParentClass().AddPadTemplate(gst.NewPadTemplate(
"src",
gst.PadSrc,
gst.PadAlways,
gst.CapsFromString(fmt.Sprintf("audio/x-raw,channels=2,rate=%d", samplerate)),
))
class.ParentClass().ParentClass().ParentClass().ParentClass().InstallProperties([]*gobject.ParamSpec{
gobject.ParamSpecInt64(
"duration",
"duration",
"Duration of the source in nanoseconds",
0,
math.MaxInt64,
0,
gobject.ParamReadwrite|gobject.ParamConstruct),
})
}
type customSrc struct {
gst.BinInstance // parent must be embedded as the first field
@@ -24,7 +53,9 @@ type customSrc struct {
// InstanceInit should initialize the element. Keep in mind that the properties are not yet present. When this is called.
func (bin *customSrc) init() {
bin.source = gst.ElementFactoryMake("audiotestsrc", "")
bin.source = gst.ElementFactoryMakeWithProperties("audiotestsrc", map[string]any{
"samplesperbuffer": samplesperbuffer,
})
bin.volume = gst.ElementFactoryMake("volume", "")
bin.AddMany(
@@ -49,7 +80,8 @@ func (bin *customSrc) init() {
func (bin *customSrc) setProperty(_ uint, value any, pspec *gobject.ParamSpec) {
switch pspec.Name() {
case "duration":
bin.Duration = value.(time.Duration)
bin.Duration = time.Duration(value.(int64)) // declared as int64 property in classInit
log.Printf("set duration to %s", bin.Duration)
bin.updateSource()
default:
panic("unknown property")
@@ -59,7 +91,7 @@ func (bin *customSrc) setProperty(_ uint, value any, pspec *gobject.ParamSpec) {
func (bin *customSrc) getProperty(_ uint, pspec *gobject.ParamSpec) any {
switch pspec.Name() {
case "duration":
return bin.Duration
return int64(bin.Duration) // declared as int64 property in classInit
default:
panic("unknown property")
}
@@ -67,9 +99,14 @@ func (bin *customSrc) getProperty(_ uint, pspec *gobject.ParamSpec) any {
// updateSource will get called to update the audiotestsrc when a property changes
func (s *customSrc) updateSource() {
if s.source != nil {
numBuffers := (float64(s.Duration / time.Second)) / (float64(samplesperbuffer) / float64(samplerate))
s.source.SetObjectProperty("num-buffers", int(math.Ceil(numBuffers)))
if s.source == nil {
// the construct param may be set before we initialized the source
return
}
numBuffers := (float64(s.Duration / time.Second)) / (float64(samplesperbuffer) / float64(samplerate))
s.source.SetObjectProperty("num-buffers", int32(math.Ceil(numBuffers)))
log.Printf("set num-buffers to %d", int(math.Ceil(numBuffers)))
}

22
examples/plugins/registered_elements/internal/customsrc/register.go
View File

@@ -1,8 +1,6 @@
package customsrc
import (
"math"
"github.com/diamondburned/gotk4/pkg/gobject/v2"
"github.com/go-gst/go-gst/pkg/gst"
)
@@ -12,25 +10,7 @@ import (
func Register() bool {
registered := gst.RegisterBinSubClass[*customSrc](
"gocustomsrc",
func(class *gst.BinClass) {
class.ParentClass().SetStaticMetadata(
"custom test source",
"Src/Test",
"Demo source bin with volume",
"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
)
class.ParentClass().ParentClass().ParentClass().ParentClass().InstallProperties([]*gobject.ParamSpec{
gobject.ParamSpecInt(
"duration",
"Duration",
"Duration of the source in nanoseconds",
0,
math.MaxInt64,
0,
gobject.ParamWritable|gobject.ParamReadable|gst.ParamMutableReady),
})
},
classInit,
nil,
gst.BinOverrides[*customSrc]{
ElementOverrides: gst.ElementOverrides[*customSrc]{

11
examples/plugins/registered_elements/main.go
View File

@@ -3,6 +3,7 @@ package main
import (
"context"
"fmt"
"log"
"os"
"os/signal"
"path/filepath"
@@ -30,6 +31,10 @@ func run(ctx context.Context) error {
systemclock := gst.SystemClockObtain()
log.Printf("using system clock: %s", systemclock.GetName())
// After registering the elements, we can use them in the parsed pipeline strings as if they were
// provided by a plugin.
ret, err := gst.ParseLaunch("gocustombin ! fakesink sync=true")
if err != nil {
@@ -42,8 +47,6 @@ func run(ctx context.Context) error {
bus := pipeline.GetBus()
pipeline.SetState(gst.StatePlaying)
go func() {
for msg := range bus.Messages(ctx) {
switch msg.Type() {
@@ -75,11 +78,11 @@ func run(ctx context.Context) error {
default:
fmt.Println("got message:", msg.String())
}
return
}
}()
pipeline.SetState(gst.StatePlaying)
<-ctx.Done()
pipeline.BlockSetState(gst.StateNull, gst.ClockTime(time.Second))