nok_lt_prediction.h

语音压缩算法

/**************************************************************************

This software module was originally developed by
Nokia in the course of development of the MPEG-2 AAC/MPEG-4 
Audio standard ISO/IEC13818-7, 14496-1, 2 and 3.
This software module is an implementation of a part
of one or more MPEG-2 AAC/MPEG-4 Audio tools as specified by the
MPEG-2 aac/MPEG-4 Audio standard. ISO/IEC  gives users of the
MPEG-2aac/MPEG-4 Audio standards free license to this software module
or modifications thereof for use in hardware or software products
claiming conformance to the MPEG-2 aac/MPEG-4 Audio  standards. Those
intending to use this software module in hardware or software products
are advised that this use may infringe existing patents. The original
developer of this software module, the subsequent
editors and their companies, and ISO/IEC have no liability for use of
this software module or modifications thereof in an
implementation. Copyright is not released for non MPEG-2 aac/MPEG-4
Audio conforming products. The original developer retains full right to
use the code for the developer's own purpose, assign or donate the code to a
third party and to inhibit third party from using the code for non
MPEG-2 aac/MPEG-4 Audio conforming products. This copyright notice
must be included in all copies or derivative works.
Copyright (c)1997.  

***************************************************************************/

#ifndef NOK_LT_PREDICTION_H_
#define NOK_LT_PREDICTION_H_

#include "nok_ltp_common.h"


extern void 
nok_init_lt_pred ( NOK_LT_PRED_STATUS * lt_status );

extern void
nok_lt_predict ( Info*               info, 
                 WINDOW_SEQUENCE     win_type,
                 WINDOW_SHAPE        win_shape,
                 WINDOW_SHAPE        win_shape_prev,
                 int*                sbk_prediction_used,
                 int*                sfb_prediction_used, 
                 NOK_LT_PRED_STATUS* lt_status,
                 Float               weight, 
                 int*                delay, 
                 Float*              current_frame,
                 int                 block_size_long, 
                 int                 block_size_medium,
                 int                 block_size_short,
		 TNS_frame_info*     tns_frame_info,
		 QC_MOD_SELECT       qc_select);

extern void
nok_ltp_buf_update (WINDOW_SEQUENCE     win_type,
		    WINDOW_SHAPE        win_shape,
		    WINDOW_SHAPE        win_shape_prev,
		    NOK_LT_PRED_STATUS* lt_status,
		    Float*              current_frame,
		    int                 block_size_long, 
		    int                 block_size_medium,
		    int                 block_size_short,
		    int                 num_short_block);

int 
nok_lt_decode ( WINDOW_SEQUENCE   win_type, 
		byte*             max_sfb, 
		int*              sbk_prediction_used,
		int*              sfb_prediction_used, 
		Float*            weight, 
		int*              delay,
		HANDLE_RESILIENCE hResilience,
		HANDLE_BUFFER     hVm,
		HANDLE_EP_INFO    hEpInfo,
		QC_MOD_SELECT     qc_select,
		enum CORE_CODEC   coreCodecIdx,
		int               max_sfb_tvq_set);


#endif /* NOK_LT_PREDICTION_H_ */