From 4421c708d144e2434edec37d4bad1272a94196f0 Mon Sep 17 00:00:00 2001
From: WeebDataHoarder <57538841+WeebDataHoarder@users.noreply.github.com>
Date: Wed, 20 Jul 2022 11:53:44 +0200
Subject: [PATCH] Add support for setting and getting the ogg muxing delay

---
 callbacks.c | 12 ++++++++++++
 encoder.go  | 29 +++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/callbacks.c b/callbacks.c
index 6306870..c888bc6 100644
--- a/callbacks.c
+++ b/callbacks.c
@@ -85,6 +85,18 @@ bridge_encoder_get_sample_rate(OggOpusEnc *st, opus_int32 *sample_rate)
 }
 
 
+int
+bridge_encoder_set_muxing_delay(OggOpusEnc *st, opus_int32 delay)
+{
+	return ope_encoder_ctl(st, OPE_SET_MUXING_DELAY(delay));
+}
+
+int
+bridge_encoder_get_muxing_delay(OggOpusEnc *st, opus_int32 *delay)
+{
+	return ope_encoder_ctl(st, OPE_GET_MUXING_DELAY(delay));
+}
+
 int
 bridge_encoder_set_bitrate(OggOpusEnc *st, opus_int32 bitrate)
 {
diff --git a/encoder.go b/encoder.go
index bea59d0..5c518a9 100644
--- a/encoder.go
+++ b/encoder.go
@@ -5,9 +5,11 @@
 package opus
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"runtime/cgo"
+	"time"
 	"unsafe"
 )
 
@@ -25,6 +27,11 @@ bridge_encoder_get_dtx(OggOpusEnc *st, opus_int32 *dtx);
 int
 bridge_encoder_get_sample_rate(OggOpusEnc *st, opus_int32 *sample_rate);
 
+int
+bridge_encoder_set_muxing_delay(OggOpusEnc *st, opus_int32 delay);
+
+int
+bridge_encoder_get_muxing_delay(OggOpusEnc *st, opus_int32 *delay);
 
 int
 bridge_encoder_set_bitrate(OggOpusEnc *st, opus_int32 bitrate);
@@ -285,6 +292,28 @@ func (enc *Encoder) Bitrate() (int, error) {
 	return int(bitrate), nil
 }
 
+// SetMuxingDelay sets maximum container delay
+func (enc *Encoder) SetMuxingDelay(delay time.Duration) error {
+	if delay < 0 || delay > time.Millisecond*1000 {
+		return errors.New("value must be between 0 to 1000 milliseconds")
+	}
+	res := C.bridge_encoder_set_muxing_delay(enc.p, C.opus_int32(delay.Milliseconds()*48))
+	if res != C.OPUS_OK {
+		return Error(res)
+	}
+	return nil
+}
+
+// MuxingDelay returns the maximum container delay
+func (enc *Encoder) MuxingDelay() (time.Duration, error) {
+	var delay C.opus_int32
+	res := C.bridge_encoder_get_muxing_delay(enc.p, &delay)
+	if res != C.OPUS_OK {
+		return 0, Error(res)
+	}
+	return time.Millisecond * time.Duration(int(delay)/48), nil
+}
+
 // SetComplexity sets the encoder's computational complexity
 func (enc *Encoder) SetComplexity(complexity int) error {
 	res := C.bridge_encoder_set_complexity(enc.p, C.opus_int32(complexity))