From d4becdcdaaed3590b59d55efcb1ba2dfb751e8b8 Mon Sep 17 00:00:00 2001
From: wys <wys9853@.com>
Date: Fri, 13 Jun 2025 22:20:04 +0800
Subject: [PATCH] =?UTF-8?q?feat(encoder):=20=E6=B7=BB=E5=8A=A0=E6=81=92?=
 =?UTF-8?q?=E5=AE=9A=E6=AF=94=E7=89=B9=E7=8E=87(CBR)=E8=AE=BE=E7=BD=AE?=
 =?UTF-8?q?=E5=8A=9F=E8=83=BD?=
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---
 encoder.go | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/encoder.go b/encoder.go
index b88dc98..ba5e54e 100644
--- a/encoder.go
+++ b/encoder.go
@@ -104,6 +104,19 @@ bridge_encoder_reset_state(OpusEncoder *st)
 	return opus_encoder_ctl(st, OPUS_RESET_STATE);
 }
 
+int
+bridge_encoder_set_vbr(OpusEncoder *st, opus_int32 vbr)
+{
+	return opus_encoder_ctl(st, OPUS_SET_VBR(vbr));
+}
+
+int
+bridge_encoder_get_vbr(OpusEncoder *st, opus_int32 *vbr)
+{
+	return opus_encoder_ctl(st, OPUS_GET_VBR(vbr));
+}
+
+
 */
 import "C"
 
@@ -400,3 +413,26 @@ func (enc *Encoder) Reset() error {
 	}
 	return nil
 }
+
+// SetCBR sets the encoder to use constant bitrate (CBR) or variable bitrate (VBR).
+func (enc *Encoder) SetCBR(cbr bool) error {
+	vbr := 1
+	if cbr {
+		vbr = 0
+	}
+	res := C.bridge_encoder_set_vbr(enc.p, C.opus_int32(vbr))
+	if res != C.OPUS_OK {
+		return Error(res)
+	}
+	return nil
+}
+
+// IsCBR checks if encoder is using CBR (false = VBR).
+func (enc *Encoder) IsCBR() (bool, error) {
+	var vbr C.opus_int32
+	res := C.bridge_encoder_get_vbr(enc.p, &vbr)
+	if res != C.OPUS_OK {
+		return false, Error(res)
+	}
+	return vbr == 0, nil
+}