add and update

RTL00_SDKV35a/component/common/audio/g711_codec.h

@@ -0,0 +1,24 @@
+#ifndef _G711_CODEC_H
+#define _G711_CODEC_H
+#include "basic_types.h"
+
+typedef enum {
+	I2S_MODE_UNKNOWN = -1,
+	I2S_MODE_G711A = 1,
+	I2S_MODE_G711U = 2 
+}I2S_mode;
+
+typedef struct {
+	I2S_mode mode;	//intend to encode as G711A or G711U
+	int len;	//data length
+//	_sema RWSema;
+	unsigned char *raw_data;	//address of buffered data (not encoded
+	int data_start; // a shift value to show where the data starts
+	int data_end;	// a shift value shows data ending
+}i2s_buf_context;
+
+//void encoder_init(int mode);
+int G711_encoder(short *source, unsigned char *des, int mode, int size);
+int G711_decoder(unsigned char *source, short *des, int mode, int size);
+int mono2stereo(unsigned char *src, unsigned char *dst, int size, int wl);
+#endif