g726private.h

来自「zigbee 飞思卡尔 音频传输 基于ucos的所有源码」· C头文件 代码 · 共 39 行

/**
 *
 * $Log: private.h,v $
 * Revision 1.4  2002/11/20 04:29:13  robertj
 * Included optimisations for G.711 and G.726 codecs, thanks Ted Szoczei
 *
 * Revision 1.1  2002/02/11 23:24:23  robertj
 * Updated to openH323 v1.8.0
 *
 * Revision 1.2  2002/02/10 21:14:54  dereks
 * Add cvs log history to head of the file.
 * Ensure file is terminated by a newline.
 *
 *
 *
 */

int predictor_zero(g726_state *state_ptr);
int predictor_pole(g726_state *state_ptr);
int step_size(g726_state *state_ptr);
int quantize(
	int		d,	/* Raw difference signal sample */
	int		y,	/* Step size multiplier */
	int *	table,	/* quantization table */
	int		size);	/* table size of short integers */
int reconstruct(
	int		sign,	/* 0 for non-negative value */
	int		dqln,	/* G.72x codeword */
	int		y);	/* Step size multiplier */
void update(
	int		y,		/* quantizer step size */
	int		wi,		/* scale factor multiplier */
	int		fi,		/* for long/short term energies */
	int		dq,		/* quantized prediction difference */
	int		sr,		/* reconstructed signal */
	int		dqsez,		/* difference from 2-pole predictor */
	g726_state *state_ptr);	/* coder state pointer */