diff options
Diffstat (limited to 'drivers/isdn/hardware/eicon/capidtmf.h')
| -rw-r--r-- | drivers/isdn/hardware/eicon/capidtmf.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/isdn/hardware/eicon/capidtmf.h b/drivers/isdn/hardware/eicon/capidtmf.h new file mode 100644 index 000000000..0a9cf59bb --- /dev/null +++ b/drivers/isdn/hardware/eicon/capidtmf.h @@ -0,0 +1,79 @@ + +/* + * + Copyright (c) Eicon Networks, 2002. + * + This source file is supplied for the use with + Eicon Networks range of DIVA Server Adapters. + * + Eicon File Revision : 2.1 + * + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + * + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY + implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + * + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ +#ifndef CAPIDTMF_H_ +#define CAPIDTMF_H_ +/*---------------------------------------------------------------------------*/ +/*---------------------------------------------------------------------------*/ +#define CAPIDTMF_TONE_GROUP_COUNT 2 +#define CAPIDTMF_LOW_GROUP_FREQUENCIES 4 +#define CAPIDTMF_HIGH_GROUP_FREQUENCIES 4 +#define DSPDTMF_RX_SENSITIVITY_LOW_DEFAULT 50 /* -52 dBm */ +#define DSPDTMF_RX_SENSITIVITY_HIGH_DEFAULT 50 /* -52 dBm */ +#define DSPDTMF_RX_HIGH_EXCEEDING_LOW_DEFAULT 10 /* dB */ +#define DSPDTMF_RX_LOW_EXCEEDING_HIGH_DEFAULT 10 /* dB */ +#define DSPDTMF_RX_HARMONICS_SEL_DEFAULT 12 /* dB */ +#define CAPIDTMF_RECV_BASE_FREQUENCY_COUNT (CAPIDTMF_LOW_GROUP_FREQUENCIES + CAPIDTMF_HIGH_GROUP_FREQUENCIES) +#define CAPIDTMF_RECV_GUARD_FREQUENCY_COUNT 8 +#define CAPIDTMF_RECV_TOTAL_FREQUENCY_COUNT (CAPIDTMF_RECV_BASE_FREQUENCY_COUNT + CAPIDTMF_RECV_GUARD_FREQUENCY_COUNT) +#define CAPIDTMF_RECV_POSITIVE_COEFF_COUNT 16 +#define CAPIDTMF_RECV_NEGATIVE_COEFF_COUNT (CAPIDTMF_RECV_TOTAL_FREQUENCY_COUNT - CAPIDTMF_RECV_POSITIVE_COEFF_COUNT) +#define CAPIDTMF_RECV_ACCUMULATE_CYCLES 205 +#define CAPIDTMF_RECV_FUNDAMENTAL_OFFSET (0xff35L * 2) +#define CAPIDTMF_RECV_FUNDAMENTAL_DECREMENT (0x0028L * 2) +#define CAPIDTMF_RECV_DIGIT_BUFFER_SIZE 32 +#define CAPIDTMF_RECV_STATE_IDLE 0x00 +#define CAPIDTMF_RECV_STATE_DTMF_ACTIVE 0x01 +typedef struct tag_capidtmf_recv_state +{ + byte digit_buffer[CAPIDTMF_RECV_DIGIT_BUFFER_SIZE]; + word digit_write_pos; + word digit_read_pos; + word indication_state; + word indication_state_ack; + long goertzel_buffer[2][CAPIDTMF_RECV_TOTAL_FREQUENCY_COUNT]; + word min_gap_duration; + word min_digit_duration; + word cycle_counter; + word current_digit_on_time; + word current_digit_off_time; + byte current_digit_value; + byte state; +} t_capidtmf_recv_state; +typedef struct tag_capidtmf_state +{ + byte ulaw; + t_capidtmf_recv_state recv; +} t_capidtmf_state; +word capidtmf_recv_indication(t_capidtmf_state *p_state, byte *buffer); +void capidtmf_recv_block(t_capidtmf_state *p_state, byte *buffer, word length); +void capidtmf_init(t_capidtmf_state *p_state, byte ulaw); +void capidtmf_recv_enable(t_capidtmf_state *p_state, word min_digit_duration, word min_gap_duration); +void capidtmf_recv_disable(t_capidtmf_state *p_state); +#define capidtmf_indication(p_state, buffer) (((p_state)->recv.indication_state != (p_state)->recv.indication_state_ack) ? capidtmf_recv_indication(p_state, buffer) : 0) +#define capidtmf_recv_process_block(p_state, buffer, length) { if ((p_state)->recv.state != CAPIDTMF_RECV_STATE_IDLE) capidtmf_recv_block(p_state, buffer, length); } +/*---------------------------------------------------------------------------*/ +/*---------------------------------------------------------------------------*/ +#endif |