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43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
package audio
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/*
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#include "gst.go.h"
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GstClockTime
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framesToClockTime (gint frames, gint rate) { return GST_FRAMES_TO_CLOCK_TIME(frames, rate); }
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gint
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clockTimeToFrames(GstClockTime ct, gint rate) { return GST_CLOCK_TIME_TO_FRAMES(ct, rate); }
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GValue * audioUtilToGValue (guintptr p) { return (GValue*)(p); }
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*/
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import "C"
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import "time"
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// FramesToDuration calculates the Clocktime (which is usually referred to as a time.Duration in the bindings)
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// from the given frames and rate.
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func FramesToDuration(frames, rate int) time.Duration {
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ct := C.framesToClockTime(C.gint(frames), C.gint(rate))
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return time.Duration(ct)
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}
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// DurationToFrames calculates the number of frames from the given duration and sample rate.
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func DurationToFrames(dur time.Duration, rate int) int {
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return int(C.clockTimeToFrames(C.GstClockTime(dur.Nanoseconds()), C.gint(rate)))
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}
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// gboolean converts a go bool to a C.gboolean.
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func gboolean(b bool) C.gboolean {
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if b {
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return C.gboolean(1)
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}
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return C.gboolean(0)
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}
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// gobool provides an easy type conversion between C.gboolean and a go bool.
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func gobool(b C.gboolean) bool {
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return int(b) > 0
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}
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func uintptrToGVal(p uintptr) *C.GValue { return (*C.GValue)(C.audioUtilToGValue(C.guintptr(p))) }
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