bufferSrcCtx.Initialize with dictionary (#124)

* OpenIOContextWithDictionary

* OpenIOContext

* OpenIOContext

* IOInterrupterCB

* OpenIOContext(filename string, flags IOContextFlags, ii *IOInterrupter, d *Dictionary)

* Program and Discard

* Program and Discard

* Program and Discard

* Program and Discard

* Program and Discard

* Program and Discard

* CodecContext
MaxBFrames()
SetMaxBFrames(n int)

* another pr

* delete Flags()

* delete Flags()

* delete Flags()

* delete PmtVersion()

* SetStreamIndex

* SetStreamIndex

* MaxBFrames()
SetMaxBFrames(n int)
RcMaxRate()
SetRcMaxRate(n int64)
RcMinRate()
SetRcMinRate(n int64)
RcBufferSize()
SetRcBufferSize(n int)

* rename rate control methods

* test passed

* bufferSrcCtx initialize with dictionary

* bufferSrcCtx initialize with dictionary

* SetHardwareDeviceContext

* SetHardwareDeviceContext

buffersrc_filter_context.go

@@ -25,8 +25,12 @@ func (bfc *BuffersrcFilterContext) FilterContext() *FilterContext {
 }
 
 // https://ffmpeg.org/doxygen/7.0/group__lavfi.html#ga8c15af28902395399fe455f6f8236848
-func (bfc *BuffersrcFilterContext) Initialize() error {
-	return newError(C.avfilter_init_dict(bfc.fc.c, nil))
+func (bfc *BuffersrcFilterContext) Initialize(d *Dictionary) error {
+	var dc **C.AVDictionary
+	if d != nil {
+		dc = &d.c
+	}
+	return newError(C.avfilter_init_dict(bfc.fc.c, dc))
 }
 
 // https://ffmpeg.org/doxygen/7.0/group__lavfi__buffersrc.html#ga398cd2a84f8b4a588197ab9d90135048

buffersrc_filter_context_test.go

@@ -0,0 +1,16 @@
+package astiav
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestBuffersrcFilterContext(t *testing.T) {
+	fg := AllocFilterGraph()
+	filter := FindFilterByName("movie")
+	bufferSrcCtx, err := fg.NewBuffersrcFilterContext(filter, "movie")
+	require.NoError(t, err)
+	d := NewDictionary()
+	require.NoError(t, d.Set("filename", "testdata/video.mp4", 0))
+	require.NoError(t, bufferSrcCtx.Initialize(d))
+}

examples/filtering/main.go

@@ -274,7 +274,7 @@ func initFilter() (err error) {
 	}
 
 	// Initialize buffersrc context
-	if err = s.buffersrcContext.Initialize(); err != nil {
+	if err = s.buffersrcContext.Initialize(nil); err != nil {
 		err = fmt.Errorf("main: initializing buffersrc context failed: %w", err)
 		return
 	}

examples/hardware_decoding_filtering/main.go

@@ -319,7 +319,7 @@ func initFilter() (err error) {
 	}
 
 	// Initialize buffersrc context
-	if err = buffersrcContext.Initialize(); err != nil {
+	if err = buffersrcContext.Initialize(nil); err != nil {
 		err = fmt.Errorf("main: initializing buffersrc context failed: %w", err)
 		return
 	}

examples/transcoding/main.go

@@ -431,7 +431,7 @@ func initFilters() (err error) {
 		}
 
 		// Initialize buffersrc context
-		if err = s.buffersrcContext.Initialize(); err != nil {
+		if err = s.buffersrcContext.Initialize(nil); err != nil {
 			err = fmt.Errorf("main: initializing buffersrc context failed: %w", err)
 			return
 		}

filter_graph_test.go

@@ -182,7 +182,7 @@ func TestFilterGraph(t *testing.T) {
 				buffersrcContextParameters.SetWidth(src.width)
 			}
 			buffersrcContext.SetParameters(buffersrcContextParameters)
-			require.NoError(t, buffersrcContext.Initialize())
+			require.NoError(t, buffersrcContext.Initialize(nil))
 			buffersrcContexts = append(buffersrcContexts, buffersrcContext)
 
 			o := AllocFilterInOut()