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