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Change the fsk filter used in CID and TDD decode to an integer based implementation

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@78227 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Doug Bailey
2007-08-06 19:52:40 +00:00
parent 8f17952065
commit 3e426df072
4 changed files with 213 additions and 190 deletions
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50
include/asterisk/fskmodem.h
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@@ -31,30 +31,39 @@
#define NCOLA 0x4000
/* new filter structure */
struct filter_struct {
int icoefs[8];
int ip;
int ixv[8];
int iyv[8];
};
typedef struct {
float spb; /*!< Samples / Bit */
int nbit; /*!< Number of Data Bits (5,7,8) */
float nstop; /*!< Number of Stop Bits 1,1.5,2 */
int parity; /*!< Parity 0=none 1=even 2=odd */
int instop; /*!< Number of Stop Bits */
int hdlc; /*!< Modo Packet */
float x0;
float x1;
float x2;
float cont;
int bw; /*!< Bandwidth */
double fmxv[8],fmyv[8]; /*!< filter stuff for M filter */
int fmp; /*!< pointer for M filter */
double fsxv[8],fsyv[8]; /*!< filter stuff for S filter */
int fsp; /*!< pointer for S filter */
double flxv[8],flyv[8]; /*!< filter stuff for L filter */
int flp; /*!< pointer for L filter */
int f_mark_idx; /*!< Mark frequency index (f_M-500)/5 */
int f_space_idx; /*!< Space frequency index (f_S-500)/5 */
int xi0;
int xi1;
int xi2;
int ispb;
int icont;
int bw; /*!< Band Selector*/
int f_mark_idx; /*!< Mark Frequency Index (f_M-500)/5 */
int f_space_idx; /*!< Space Frequency Index (f_S-500)/5 */
int state;
int pcola; /*!< Pointer to data queues */
float cola_in[NCOLA]; /*!< Queue of input samples */
float cola_filter[NCOLA]; /*!< Queue of samples after filters */
float cola_demod[NCOLA]; /*!< Queue of demodulated samples */
int pllispb; /*!<Pll autosense */
int pllids;
int pllispb2;
struct filter_struct mark_filter;
struct filter_struct space_filter;
struct filter_struct demod_filter;
} fsk_data;
/* \brief Retrieve a serial byte into outbyte.
@@ -65,7 +74,8 @@ typedef struct {
\arg 0: Still looking for something...
\arg 1: An output byte was received and stored in outbyte
\arg -1: An error occured in the transmission
He must be called with at least 80 bytes of buffer. */
This must be called with at least 80 bytes of buffer. */
int fsk_serial(fsk_data *fskd, short *buffer, int *len, int *outbyte);
int fskmodem_init(fsk_data *fskd);
#endif /* _ASTERISK_FSKMODEM_H */