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diff --git a/thirdparties/win32/include/g729b/vad.h b/thirdparties/win32/include/g729b/vad.h
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+/*
+ ITU-T G.729A Annex B ANSI-C Source Code
+ Version 1.3 Last modified: August 1997
+ Copyright (c) 1996, France Telecom, Rockwell International,
+ Universite de Sherbrooke.
+ All rights reserved.
+*/
+
+#define NP 12 /* Increased LPC order */
+#define NOISE 0
+#define VOICE 1
+#define INIT_FRAME 32
+#define INIT_COUNT 20
+#define ZC_START 120
+#define ZC_END 200
+
+void vad_init(void);
+
+void vad(
+ Word16 rc,
+ Word16 *lsf,
+ Word16 *r_h,
+ Word16 *r_l,
+ Word16 exp_R0,
+ Word16 *sigpp,
+ Word16 frm_count,
+ Word16 prev_marker,
+ Word16 pprev_marker,
+ Word16 *marker);
+
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