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277 lines
7.8 KiB
277 lines
7.8 KiB
/* |
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* Audio support data for ISDN4Linux. |
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* |
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* Copyright 2002/2003 by Andreas Eversberg ([email protected]) |
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* |
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* This software may be used and distributed according to the terms |
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* of the GNU General Public License, incorporated herein by reference. |
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* |
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*/ |
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#define DEBUG_DSP_CTRL 0x0001 |
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#define DEBUG_DSP_CORE 0x0002 |
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#define DEBUG_DSP_DTMF 0x0004 |
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#define DEBUG_DSP_CMX 0x0010 |
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#define DEBUG_DSP_TONE 0x0020 |
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#define DEBUG_DSP_BLOWFISH 0x0040 |
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#define DEBUG_DSP_DELAY 0x0100 |
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#define DEBUG_DSP_CLOCK 0x0200 |
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#define DEBUG_DSP_DTMFCOEFF 0x8000 /* heavy output */ |
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/* options may be: |
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* |
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* bit 0 = use ulaw instead of alaw |
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* bit 1 = enable hfc hardware acceleration for all channels |
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* |
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*/ |
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#define DSP_OPT_ULAW (1 << 0) |
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#define DSP_OPT_NOHARDWARE (1 << 1) |
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#include <linux/timer.h> |
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#include <linux/workqueue.h> |
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#include "dsp_ecdis.h" |
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extern int dsp_options; |
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extern int dsp_debug; |
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extern int dsp_poll; |
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extern int dsp_tics; |
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extern spinlock_t dsp_lock; |
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extern struct work_struct dsp_workq; |
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extern u32 dsp_poll_diff; /* calculated fix-comma corrected poll value */ |
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/*************** |
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* audio stuff * |
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***************/ |
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extern s32 dsp_audio_alaw_to_s32[256]; |
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extern s32 dsp_audio_ulaw_to_s32[256]; |
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extern s32 *dsp_audio_law_to_s32; |
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extern u8 dsp_audio_s16_to_law[65536]; |
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extern u8 dsp_audio_alaw_to_ulaw[256]; |
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extern u8 dsp_audio_mix_law[65536]; |
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extern u8 dsp_audio_seven2law[128]; |
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extern u8 dsp_audio_law2seven[256]; |
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extern void dsp_audio_generate_law_tables(void); |
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extern void dsp_audio_generate_s2law_table(void); |
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extern void dsp_audio_generate_seven(void); |
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extern void dsp_audio_generate_mix_table(void); |
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extern void dsp_audio_generate_ulaw_samples(void); |
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extern void dsp_audio_generate_volume_changes(void); |
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extern u8 dsp_silence; |
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/************* |
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* cmx stuff * |
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*************/ |
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#define MAX_POLL 256 /* maximum number of send-chunks */ |
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#define CMX_BUFF_SIZE 0x8000 /* must be 2**n (0x1000 about 1/2 second) */ |
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#define CMX_BUFF_HALF 0x4000 /* CMX_BUFF_SIZE / 2 */ |
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#define CMX_BUFF_MASK 0x7fff /* CMX_BUFF_SIZE - 1 */ |
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/* how many seconds will we check the lowest delay until the jitter buffer |
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is reduced by that delay */ |
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#define MAX_SECONDS_JITTER_CHECK 5 |
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extern struct timer_list dsp_spl_tl; |
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/* the datatype need to match jiffies datatype */ |
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extern unsigned long dsp_spl_jiffies; |
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/* the structure of conferences: |
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* |
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* each conference has a unique number, given by user space. |
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* the conferences are linked in a chain. |
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* each conference has members linked in a chain. |
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* each dsplayer points to a member, each member points to a dsplayer. |
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*/ |
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/* all members within a conference (this is linked 1:1 with the dsp) */ |
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struct dsp; |
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struct dsp_conf_member { |
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struct list_head list; |
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struct dsp *dsp; |
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}; |
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/* the list of all conferences */ |
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struct dsp_conf { |
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struct list_head list; |
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u32 id; |
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/* all cmx stacks with the same ID are |
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connected */ |
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struct list_head mlist; |
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int software; /* conf is processed by software */ |
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int hardware; /* conf is processed by hardware */ |
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/* note: if both unset, has only one member */ |
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}; |
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/************** |
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* DTMF stuff * |
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**************/ |
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#define DSP_DTMF_NPOINTS 102 |
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#define ECHOCAN_BUFF_SIZE 0x400 /* must be 2**n */ |
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#define ECHOCAN_BUFF_MASK 0x3ff /* -1 */ |
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struct dsp_dtmf { |
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int enable; /* dtmf is enabled */ |
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int treshold; /* above this is dtmf (square of) */ |
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int software; /* dtmf uses software decoding */ |
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int hardware; /* dtmf uses hardware decoding */ |
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int size; /* number of bytes in buffer */ |
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signed short buffer[DSP_DTMF_NPOINTS]; |
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/* buffers one full dtmf frame */ |
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u8 lastwhat, lastdigit; |
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int count; |
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u8 digits[16]; /* dtmf result */ |
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}; |
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/****************** |
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* pipeline stuff * |
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******************/ |
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struct dsp_pipeline { |
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rwlock_t lock; |
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struct list_head list; |
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int inuse; |
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}; |
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/*************** |
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* tones stuff * |
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***************/ |
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struct dsp_tone { |
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int software; /* tones are generated by software */ |
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int hardware; /* tones are generated by hardware */ |
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int tone; |
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void *pattern; |
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int count; |
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int index; |
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struct timer_list tl; |
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}; |
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/*************** |
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* echo stuff * |
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***************/ |
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struct dsp_echo { |
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int software; /* echo is generated by software */ |
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int hardware; /* echo is generated by hardware */ |
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}; |
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/***************** |
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* general stuff * |
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*****************/ |
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struct dsp { |
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struct list_head list; |
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struct mISDNchannel ch; |
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struct mISDNchannel *up; |
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unsigned char name[64]; |
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int b_active; |
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struct dsp_echo echo; |
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int rx_disabled; /* what the user wants */ |
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int rx_is_off; /* what the card is */ |
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int tx_mix; |
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struct dsp_tone tone; |
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struct dsp_dtmf dtmf; |
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int tx_volume, rx_volume; |
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/* queue for sending frames */ |
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struct work_struct workq; |
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struct sk_buff_head sendq; |
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int hdlc; /* if mode is hdlc */ |
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int data_pending; /* currently an unconfirmed frame */ |
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/* conference stuff */ |
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u32 conf_id; |
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struct dsp_conf *conf; |
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struct dsp_conf_member |
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*member; |
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/* buffer stuff */ |
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int rx_W; /* current write pos for data without timestamp */ |
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int rx_R; /* current read pos for transmit clock */ |
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int rx_init; /* if set, pointers will be adjusted first */ |
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int tx_W; /* current write pos for transmit data */ |
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int tx_R; /* current read pos for transmit clock */ |
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int rx_delay[MAX_SECONDS_JITTER_CHECK]; |
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int tx_delay[MAX_SECONDS_JITTER_CHECK]; |
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u8 tx_buff[CMX_BUFF_SIZE]; |
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u8 rx_buff[CMX_BUFF_SIZE]; |
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int last_tx; /* if set, we transmitted last poll interval */ |
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int cmx_delay; /* initial delay of buffers, |
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or 0 for dynamic jitter buffer */ |
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int tx_dejitter; /* if set, dejitter tx buffer */ |
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int tx_data; /* enables tx-data of CMX to upper layer */ |
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/* hardware stuff */ |
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struct dsp_features features; |
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int features_rx_off; /* set if rx_off is featured */ |
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int features_fill_empty; /* set if fill_empty is featured */ |
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int pcm_slot_rx; /* current PCM slot (or -1) */ |
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int pcm_bank_rx; |
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int pcm_slot_tx; |
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int pcm_bank_tx; |
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int hfc_conf; /* unique id of current conference (or -1) */ |
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/* encryption stuff */ |
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int bf_enable; |
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u32 bf_p[18]; |
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u32 bf_s[1024]; |
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int bf_crypt_pos; |
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u8 bf_data_in[9]; |
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u8 bf_crypt_out[9]; |
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int bf_decrypt_in_pos; |
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int bf_decrypt_out_pos; |
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u8 bf_crypt_inring[16]; |
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u8 bf_data_out[9]; |
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int bf_sync; |
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struct dsp_pipeline |
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pipeline; |
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}; |
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/* functions */ |
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extern void dsp_change_volume(struct sk_buff *skb, int volume); |
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extern struct list_head dsp_ilist; |
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extern struct list_head conf_ilist; |
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extern void dsp_cmx_debug(struct dsp *dsp); |
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extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp); |
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extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id); |
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extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb); |
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extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb); |
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extern void dsp_cmx_send(void *arg); |
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extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb); |
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extern int dsp_cmx_del_conf_member(struct dsp *dsp); |
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extern int dsp_cmx_del_conf(struct dsp_conf *conf); |
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extern void dsp_dtmf_goertzel_init(struct dsp *dsp); |
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extern void dsp_dtmf_hardware(struct dsp *dsp); |
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extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len, |
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int fmt); |
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extern int dsp_tone(struct dsp *dsp, int tone); |
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extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len); |
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extern void dsp_tone_timeout(struct timer_list *t); |
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extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len); |
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extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len); |
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extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen); |
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extern void dsp_bf_cleanup(struct dsp *dsp); |
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extern int dsp_pipeline_module_init(void); |
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extern void dsp_pipeline_module_exit(void); |
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extern int dsp_pipeline_init(struct dsp_pipeline *pipeline); |
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extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline); |
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extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg); |
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extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, |
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int len); |
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extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, |
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int len, unsigned int txlen);
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