pure sdk for main

2025-08-27 09:51:58 +01:00
parent f0d033f1c9
commit 0571416e7c
3283 changed files with 1577720 additions and 1 deletions
@@ -0,0 +1,65 @@
+/*
+  ============================================================================
+   File: lowcfe.h                                            V.1.0-24.MAY-2005
+  ============================================================================
+
+                     UGST/ITU-T G711 Appendix I PLC MODULE
+
+                          GLOBAL FUNCTION PROTOTYPES
+
+   History:
+   24.May.05	v1.0	First version <AT&T>
+						Integration in STL2005 <Cyril Guillaume & Stephane Ragot - stephane.ragot@francetelecom.com>
+  ============================================================================
+*/
+#ifndef __LOWCFE_C_H__
+#define __LOWCFE_C_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef USEDOUBLES
+typedef double Float;		/* likely to be bit-exact between machines */
+#else
+typedef float Float;
+#endif
+
+#define	PITCH_MIN	40		/* minimum allowed pitch, 200 Hz */
+#define PITCH_MAX	120		/* maximum allowed pitch, 66 Hz */
+#define	PITCHDIFF	(PITCH_MAX - PITCH_MIN)
+#define	POVERLAPMAX	(PITCH_MAX >> 2)/* maximum pitch OLA window */
+#define	HISTORYLEN	(PITCH_MAX * 3 + POVERLAPMAX) /* history buffer length*/
+#define	NDEC		2		/* 2:1 decimation */
+#define	CORRLEN		160		/* 20 msec correlation length */
+#define	CORRBUFLEN	(CORRLEN + PITCH_MAX) /* correlation buffer length */
+#define	CORRMINPOWER	(250)	/* minimum power */
+#define	EOVERLAPINCR	32		/* end OLA increment per frame, 4ms */
+#define	FRAMESZ		80		/* 10 msec at 8kHz */
+#define	ATTENFAC	((Float).2)	/* attenuation factor per 10ms frame */
+#define	ATTENINCR	(ATTENFAC/FRAMESZ) /* attenuation per sample */
+
+typedef struct _LowcFE_c {
+	int	erasecnt;		/* consecutive erased frames */
+	int	poverlap;		/* overlap based on pitch */
+	int	poffset;		/* offset into pitch period */
+	int	pitch;			/* pitch estimate */
+	int	pitchblen;		/* current pitch buffer length */
+	short	*pitchbufend;		/* end of pitch buffer */
+	short	*pitchbufstart;		/* start of pitch buffer */
+	short	pitchbuf[HISTORYLEN];	/* buffer for cycles of speech */
+	short	lastq[POVERLAPMAX];	/* saved last quarter wavelengh */
+	short	history[HISTORYLEN];	/* history buffer */
+} LowcFE_c;
+
+/* public functions */
+void g711plc_construct(LowcFE_c*);	/* constructor */
+void g711plc_dofe(LowcFE_c*, short *s);	/* synthesize speech for erasure */
+void g711plc_addtohistory(LowcFE_c*, short *s);
+		/* add a good frame to history buffer */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* __LOWCFE_C_H__ */