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/* 
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* 
*      COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH 
*      90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100 
* 
*      The program(s) may be used and/or copied only with the 
*      written permission from Ericsson or in accordance 
*      with the terms and conditions stipulated in the agreement or 
*      contract under which the program(s) have been supplied. 
* 
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* 
*      File             : diag_interleaver.h 
*      Purpose          : diagonal (chain) interleaver routine 
* 
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*/ 
#ifndef diag_interleaver_h 
#define diag_interleaver_h "$Id: $" 
 
/* 
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*                         INCLUDE FILES 
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*/ 
 
#include "init_interleaver.h" 
 
 
/* 
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*                         DECLARATION OF PROTOTYPES 
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*/ 
 
/* ---------------------------------------------------------------------- */ 
/* diag_interleaver:                                                      */ 
/* Diagonal (chain) interleaver, based on block-by-block processing.      */ 
/* An arbitrary number of bits can be interleaved, depending of the       */ 
/* value num_bits. The vector "out", which must have the same             */ 
/* length than "in", contains the interleaved samples.                    */ 
/* All states (memory etc.) of the interleaver are stored in the variable */ 
/* *intl_state. Therefore, a pointer to this variable must be handled to  */ 
/* this function. This variable initially has to be initialized by the    */ 
/* function init_interleaver, which offers also the possibility to        */ 
/* specify the dimensions of the interleaver matrix.                      */ 
/* ---------------------------------------------------------------------- */ 
 
void diag_interleaver(WORD16 *out, 
                      WORD16 *in, 
                      WORD16  num_bits, 
                      interleaver_state_t *intl_state); 
 
/* ---------------------------------------------------------------------- */ 
/* diag_interleaver_flush:                                                */ 
/* Execution of the diagonal (chain) interleaver without writing in new   */ 
/* samples. The number of calculated output samples is returned via the   */ 
/* value *num_bits.                                                       */ 
/* ---------------------------------------------------------------------- */ 
 
void diag_interleaver_flush(WORD16 *out, 
                            WORD16 *num_bits, 
                            interleaver_state_t *intl_state); 
 
#endif