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//TODO: this file shouldn't be part of the GSM Receiver
#ifndef __GSMSTACK_CCH_H__
#define __GSMSTACK_CCH_H__ 1
#ifdef __cplusplus
extern "C" {
#endif
#include "gsmstack.h"
/*
* decode_cch
*
* Decode a "common" control channel. Most control channels use
* the same burst, interleave, Viterbi and parity configuration.
* The documentation for the control channels defines SACCH first
* and then just keeps referring to that.
*
* The current (investigated) list is as follows:
*
* BCCH Norm
* BCCH Ext
* PCH
* AGCH
* CBCH (SDCCH/4)
* CBCH (SDCCH/8)
* SDCCH/4
* SACCH/C4
* SDCCH/8
* SACCH/C8
*
* We provide two functions, one for where all four bursts are
* contiguous, and one where they aren't.
*/
#define DATA_BLOCK_SIZE 184
#define PARITY_SIZE 40
#define FLUSH_BITS_SIZE 4
#define PARITY_OUTPUT_SIZE (DATA_BLOCK_SIZE + PARITY_SIZE + FLUSH_BITS_SIZE)
#define CONV_INPUT_SIZE PARITY_OUTPUT_SIZE
#define CONV_SIZE (2 * CONV_INPUT_SIZE)
#define BLOCKS 4
#define iBLOCK_SIZE (CONV_SIZE / BLOCKS)
#define eBLOCK_SIZE (iBLOCK_SIZE + 2)
unsigned char *decode_cch(GS_CTX *ctx, unsigned char *burst, unsigned int *len);
unsigned char *decode_facch(GS_CTX *ctx, unsigned char *burst, unsigned int *len, int offset);
//unsigned char *decode_cch(GS_CTX *ctx, unsigned char *, unsigned char *, unsigned char *, unsigned char *, unsigned int *len);
//unsigned char *decode_cch(GS_CTX *ctx, unsigned char *, unsigned int *);
#ifdef __cplusplus
}
#endif
#endif
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