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linux/drivers/isdn/mISDN/dsp_tones.c
Kees Cook e313ac12eb mISDN: Convert timers to use timer_setup() 
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Geliang Tang <geliangtang@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Anton Vasilyev <vasilyev@ispras.ru>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-18 12:39:39 +01:00

551 lines
17 KiB
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/*
* Audio support data for ISDN4Linux.
*
* Copyright 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.
*
*/
#include <linux/gfp.h>
#include <linux/mISDNif.h>
#include <linux/mISDNdsp.h>
#include "core.h"
#include "dsp.h"
#define DATA_S sample_silence
#define SIZE_S (&sizeof_silence)
#define DATA_GA sample_german_all
#define SIZE_GA (&sizeof_german_all)
#define DATA_GO sample_german_old
#define SIZE_GO (&sizeof_german_old)
#define DATA_DT sample_american_dialtone
#define SIZE_DT (&sizeof_american_dialtone)
#define DATA_RI sample_american_ringing
#define SIZE_RI (&sizeof_american_ringing)
#define DATA_BU sample_american_busy
#define SIZE_BU (&sizeof_american_busy)
#define DATA_S1 sample_special1
#define SIZE_S1 (&sizeof_special1)
#define DATA_S2 sample_special2
#define SIZE_S2 (&sizeof_special2)
#define DATA_S3 sample_special3
#define SIZE_S3 (&sizeof_special3)
/***************/
/* tones loops */
/***************/
/* all tones are alaw encoded */
/* the last sample+1 is in phase with the first sample. the error is low */
static u8 sample_german_all[] = {
0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
0xdc, 0xfc, 0x6c,
0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
0xdc, 0xfc, 0x6c,
0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
0xdc, 0xfc, 0x6c,
0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
0xdc, 0xfc, 0x6c,
};
static u32 sizeof_german_all = sizeof(sample_german_all);
static u8 sample_german_old[] = {
0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
0x8c,
0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
0x8c,
0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
0x8c,
0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
0x8c,
};
static u32 sizeof_german_old = sizeof(sample_german_old);
static u8 sample_american_dialtone[] = {
0x2a, 0x18, 0x90, 0x6c, 0x4c, 0xbc, 0x4c, 0x6c,
0x10, 0x58, 0x32, 0xb9, 0x31, 0x2d, 0x8d, 0x0d,
0x8d, 0x2d, 0x31, 0x99, 0x0f, 0x28, 0x60, 0xf0,
0xd0, 0x50, 0xd0, 0x30, 0x60, 0x08, 0x8e, 0x67,
0x09, 0x19, 0x21, 0xe1, 0xd9, 0xb9, 0x29, 0x67,
0x83, 0x02, 0xce, 0xbe, 0xee, 0x1a, 0x1b, 0xef,
0xbf, 0xcf, 0x03, 0x82, 0x66, 0x28, 0xb8, 0xd8,
0xe0, 0x20, 0x18, 0x08, 0x66, 0x8f, 0x09, 0x61,
0x31, 0xd1, 0x51, 0xd1, 0xf1, 0x61, 0x29, 0x0e,
0x98, 0x30, 0x2c, 0x8c, 0x0c, 0x8c, 0x2c, 0x30,
0xb8, 0x33, 0x59, 0x11, 0x6d, 0x4d, 0xbd, 0x4d,
0x6d, 0x91, 0x19,
};
static u32 sizeof_american_dialtone = sizeof(sample_american_dialtone);
static u8 sample_american_ringing[] = {
0x2a, 0xe0, 0xac, 0x0c, 0xbc, 0x4c, 0x8c, 0x90,
0x48, 0xc7, 0xc1, 0xed, 0xcd, 0x4d, 0xcd, 0xed,
0xc1, 0xb7, 0x08, 0x30, 0xec, 0xcc, 0xcc, 0x8c,
0x10, 0x58, 0x1a, 0x99, 0x71, 0xed, 0x8d, 0x8d,
0x2d, 0x41, 0x89, 0x9e, 0x20, 0x70, 0x2c, 0xec,
0x2c, 0x70, 0x20, 0x86, 0x77, 0xe1, 0x31, 0x11,
0xd1, 0xf1, 0x81, 0x09, 0xa3, 0x56, 0x58, 0x00,
0x40, 0xc0, 0x60, 0x38, 0x46, 0x43, 0x57, 0x39,
0xd9, 0x59, 0x99, 0xc9, 0x77, 0x2f, 0x2e, 0xc6,
0xd6, 0x28, 0xd6, 0x36, 0x26, 0x2e, 0x8a, 0xa3,
0x43, 0x63, 0x4b, 0x4a, 0x62, 0x42, 0xa2, 0x8b,
0x2f, 0x27, 0x37, 0xd7, 0x29, 0xd7, 0xc7, 0x2f,
0x2e, 0x76, 0xc8, 0x98, 0x58, 0xd8, 0x38, 0x56,
0x42, 0x47, 0x39, 0x61, 0xc1, 0x41, 0x01, 0x59,
0x57, 0xa2, 0x08, 0x80, 0xf0, 0xd0, 0x10, 0x30,
0xe0, 0x76, 0x87, 0x21, 0x71, 0x2d, 0xed, 0x2d,
0x71, 0x21, 0x9f, 0x88, 0x40, 0x2c, 0x8c, 0x8c,
0xec, 0x70, 0x98, 0x1b, 0x59, 0x11, 0x8d, 0xcd,
0xcd, 0xed, 0x31, 0x09, 0xb6, 0xc0, 0xec, 0xcc,
0x4c, 0xcc, 0xec, 0xc0, 0xc6, 0x49, 0x91, 0x8d,
0x4d, 0xbd, 0x0d, 0xad, 0xe1,
};
static u32 sizeof_american_ringing = sizeof(sample_american_ringing);
static u8 sample_american_busy[] = {
0x2a, 0x00, 0x6c, 0x4c, 0x4c, 0x6c, 0xb0, 0x66,
0x99, 0x11, 0x6d, 0x8d, 0x2d, 0x41, 0xd7, 0x96,
0x60, 0xf0, 0x70, 0x40, 0x58, 0xf6, 0x53, 0x57,
0x09, 0x89, 0xd7, 0x5f, 0xe3, 0x2a, 0xe3, 0x5f,
0xd7, 0x89, 0x09, 0x57, 0x53, 0xf6, 0x58, 0x40,
0x70, 0xf0, 0x60, 0x96, 0xd7, 0x41, 0x2d, 0x8d,
0x6d, 0x11, 0x99, 0x66, 0xb0, 0x6c, 0x4c, 0x4c,
0x6c, 0x00, 0x2a, 0x01, 0x6d, 0x4d, 0x4d, 0x6d,
0xb1, 0x67, 0x98, 0x10, 0x6c, 0x8c, 0x2c, 0x40,
0xd6, 0x97, 0x61, 0xf1, 0x71, 0x41, 0x59, 0xf7,
0x52, 0x56, 0x08, 0x88, 0xd6, 0x5e, 0xe2, 0x2a,
0xe2, 0x5e, 0xd6, 0x88, 0x08, 0x56, 0x52, 0xf7,
0x59, 0x41, 0x71, 0xf1, 0x61, 0x97, 0xd6, 0x40,
0x2c, 0x8c, 0x6c, 0x10, 0x98, 0x67, 0xb1, 0x6d,
0x4d, 0x4d, 0x6d, 0x01,
};
static u32 sizeof_american_busy = sizeof(sample_american_busy);
static u8 sample_special1[] = {
0x2a, 0x2c, 0xbc, 0x6c, 0xd6, 0x71, 0xbd, 0x0d,
0xd9, 0x80, 0xcc, 0x4c, 0x40, 0x39, 0x0d, 0xbd,
0x11, 0x86, 0xec, 0xbc, 0xec, 0x0e, 0x51, 0xbd,
0x8d, 0x89, 0x30, 0x4c, 0xcc, 0xe0, 0xe1, 0xcd,
0x4d, 0x31, 0x88, 0x8c, 0xbc, 0x50, 0x0f, 0xed,
0xbd, 0xed, 0x87, 0x10, 0xbc, 0x0c, 0x38, 0x41,
0x4d, 0xcd, 0x81, 0xd8, 0x0c, 0xbc, 0x70, 0xd7,
0x6d, 0xbd, 0x2d,
};
static u32 sizeof_special1 = sizeof(sample_special1);
static u8 sample_special2[] = {
0x2a, 0xcc, 0x8c, 0xd7, 0x4d, 0x2d, 0x18, 0xbc,
0x10, 0xc1, 0xbd, 0xc1, 0x10, 0xbc, 0x18, 0x2d,
0x4d, 0xd7, 0x8c, 0xcc, 0x2a, 0xcd, 0x8d, 0xd6,
0x4c, 0x2c, 0x19, 0xbd, 0x11, 0xc0, 0xbc, 0xc0,
0x11, 0xbd, 0x19, 0x2c, 0x4c, 0xd6, 0x8d, 0xcd,
0x2a, 0xcc, 0x8c, 0xd7, 0x4d, 0x2d, 0x18, 0xbc,
0x10, 0xc1, 0xbd, 0xc1, 0x10, 0xbc, 0x18, 0x2d,
0x4d, 0xd7, 0x8c, 0xcc, 0x2a, 0xcd, 0x8d, 0xd6,
0x4c, 0x2c, 0x19, 0xbd, 0x11, 0xc0, 0xbc, 0xc0,
0x11, 0xbd, 0x19, 0x2c, 0x4c, 0xd6, 0x8d, 0xcd,
};
static u32 sizeof_special2 = sizeof(sample_special2);
static u8 sample_special3[] = {
0x2a, 0xbc, 0x18, 0xcd, 0x11, 0x2c, 0x8c, 0xc1,
0x4d, 0xd6, 0xbc, 0xd6, 0x4d, 0xc1, 0x8c, 0x2c,
0x11, 0xcd, 0x18, 0xbc, 0x2a, 0xbd, 0x19, 0xcc,
0x10, 0x2d, 0x8d, 0xc0, 0x4c, 0xd7, 0xbd, 0xd7,
0x4c, 0xc0, 0x8d, 0x2d, 0x10, 0xcc, 0x19, 0xbd,
0x2a, 0xbc, 0x18, 0xcd, 0x11, 0x2c, 0x8c, 0xc1,
0x4d, 0xd6, 0xbc, 0xd6, 0x4d, 0xc1, 0x8c, 0x2c,
0x11, 0xcd, 0x18, 0xbc, 0x2a, 0xbd, 0x19, 0xcc,
0x10, 0x2d, 0x8d, 0xc0, 0x4c, 0xd7, 0xbd, 0xd7,
0x4c, 0xc0, 0x8d, 0x2d, 0x10, 0xcc, 0x19, 0xbd,
};
static u32 sizeof_special3 = sizeof(sample_special3);
static u8 sample_silence[] = {
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
};
static u32 sizeof_silence = sizeof(sample_silence);
struct tones_samples {
u32 *len;
u8 *data;
};
static struct
tones_samples samples[] = {
{&sizeof_german_all, sample_german_all},
{&sizeof_german_old, sample_german_old},
{&sizeof_american_dialtone, sample_american_dialtone},
{&sizeof_american_ringing, sample_american_ringing},
{&sizeof_american_busy, sample_american_busy},
{&sizeof_special1, sample_special1},
{&sizeof_special2, sample_special2},
{&sizeof_special3, sample_special3},
{NULL, NULL},
};
/***********************************
* generate ulaw from alaw samples *
***********************************/
void
dsp_audio_generate_ulaw_samples(void)
{
int i, j;
i = 0;
while (samples[i].len) {
j = 0;
while (j < (*samples[i].len)) {
samples[i].data[j] =
dsp_audio_alaw_to_ulaw[samples[i].data[j]];
j++;
}
i++;
}
}
/****************************
* tone sequence definition *
****************************/
static struct pattern {
int tone;
u8 *data[10];
u32 *siz[10];
u32 seq[10];
} pattern[] = {
{TONE_GERMAN_DIALTONE,
{DATA_GA, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GA, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{1900, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_OLDDIALTONE,
{DATA_GO, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GO, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{1998, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_AMERICAN_DIALTONE,
{DATA_DT, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_DT, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{8000, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_DIALPBX,
{DATA_GA, DATA_S, DATA_GA, DATA_S, DATA_GA, DATA_S, NULL, NULL, NULL,
NULL},
{SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, NULL, NULL, NULL,
NULL},
{2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
{TONE_GERMAN_OLDDIALPBX,
{DATA_GO, DATA_S, DATA_GO, DATA_S, DATA_GO, DATA_S, NULL, NULL, NULL,
NULL},
{SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, NULL, NULL, NULL,
NULL},
{2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
{TONE_AMERICAN_DIALPBX,
{DATA_DT, DATA_S, DATA_DT, DATA_S, DATA_DT, DATA_S, NULL, NULL, NULL,
NULL},
{SIZE_DT, SIZE_S, SIZE_DT, SIZE_S, SIZE_DT, SIZE_S, NULL, NULL, NULL,
NULL},
{2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
{TONE_GERMAN_RINGING,
{DATA_GA, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GA, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{8000, 32000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_OLDRINGING,
{DATA_GO, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GO, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{8000, 40000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_AMERICAN_RINGING,
{DATA_RI, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_RI, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{8000, 32000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_RINGPBX,
{DATA_GA, DATA_S, DATA_GA, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL},
{4000, 4000, 4000, 28000, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_OLDRINGPBX,
{DATA_GO, DATA_S, DATA_GO, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL},
{4000, 4000, 4000, 28000, 0, 0, 0, 0, 0, 0} },
{TONE_AMERICAN_RINGPBX,
{DATA_RI, DATA_S, DATA_RI, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_RI, SIZE_S, SIZE_RI, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL},
{4000, 4000, 4000, 28000, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_BUSY,
{DATA_GA, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GA, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{4000, 4000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_OLDBUSY,
{DATA_GO, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GO, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{1000, 5000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_AMERICAN_BUSY,
{DATA_BU, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_BU, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{4000, 4000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_HANGUP,
{DATA_GA, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GA, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{4000, 4000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_OLDHANGUP,
{DATA_GO, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GO, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{1000, 5000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_AMERICAN_HANGUP,
{DATA_DT, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_DT, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{8000, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_SPECIAL_INFO,
{DATA_S1, DATA_S2, DATA_S3, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_S1, SIZE_S2, SIZE_S3, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL},
{2666, 2666, 2666, 8002, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_GASSENBESETZT,
{DATA_GA, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GA, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{2000, 2000, 0, 0, 0, 0, 0, 0, 0, 0} },
{TONE_GERMAN_AUFSCHALTTON,
{DATA_GO, DATA_S, DATA_GO, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL},
{SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL},
{1000, 5000, 1000, 17000, 0, 0, 0, 0, 0, 0} },
{0,
{NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
/******************
* copy tone data *
******************/
/* an sk_buff is generated from the number of samples needed.
* the count will be changed and may begin from 0 each pattern period.
* the clue is to precalculate the pointers and legths to use only one
* memcpy per function call, or two memcpy if the tone sequence changes.
*
* pattern - the type of the pattern
* count - the sample from the beginning of the pattern (phase)
* len - the number of bytes
*
* return - the sk_buff with the sample
*
* if tones has finished (e.g. knocking tone), dsp->tones is turned off
*/
void dsp_tone_copy(struct dsp *dsp, u8 *data, int len)
{
int index, count, start, num;
struct pattern *pat;
struct dsp_tone *tone = &dsp->tone;
/* if we have no tone, we copy silence */
if (!tone->tone) {
memset(data, dsp_silence, len);
return;
}
/* process pattern */
pat = (struct pattern *)tone->pattern;
/* points to the current pattern */
index = tone->index; /* gives current sequence index */
count = tone->count; /* gives current sample */
/* copy sample */
while (len) {
/* find sample to start with */
while (42) {
/* wrap around */
if (!pat->seq[index]) {
count = 0;
index = 0;
}
/* check if we are currently playing this tone */
if (count < pat->seq[index])
break;
if (dsp_debug & DEBUG_DSP_TONE)
printk(KERN_DEBUG "%s: reaching next sequence "
"(index=%d)\n", __func__, index);
count -= pat->seq[index];
index++;
}
/* calculate start and number of samples */
start = count % (*(pat->siz[index]));
num = len;
if (num + count > pat->seq[index])
num = pat->seq[index] - count;
if (num + start > (*(pat->siz[index])))
num = (*(pat->siz[index])) - start;
/* copy memory */
memcpy(data, pat->data[index] + start, num);
/* reduce length */
data += num;
count += num;
len -= num;
}
tone->index = index;
tone->count = count;
/* return sk_buff */
return;
}
/*******************************
* send HW message to hfc card *
*******************************/
static void
dsp_tone_hw_message(struct dsp *dsp, u8 *sample, int len)
{
struct sk_buff *nskb;
/* unlocking is not required, because we don't expect a response */
nskb = _alloc_mISDN_skb(PH_CONTROL_REQ,
(len) ? HFC_SPL_LOOP_ON : HFC_SPL_LOOP_OFF, len, sample,
GFP_ATOMIC);
if (nskb) {
if (dsp->ch.peer) {
if (dsp->ch.recv(dsp->ch.peer, nskb))
dev_kfree_skb(nskb);
} else
dev_kfree_skb(nskb);
}
}
/*****************
* timer expires *
*****************/
void
dsp_tone_timeout(struct timer_list *t)
{
struct dsp *dsp = from_timer(dsp, t, tone.tl);
struct dsp_tone *tone = &dsp->tone;
struct pattern *pat = (struct pattern *)tone->pattern;
int index = tone->index;
if (!tone->tone)
return;
index++;
if (!pat->seq[index])
index = 0;
tone->index = index;
/* set next tone */
if (pat->data[index] == DATA_S)
dsp_tone_hw_message(dsp, NULL, 0);
else
dsp_tone_hw_message(dsp, pat->data[index], *(pat->siz[index]));
/* set timer */
tone->tl.expires = jiffies + (pat->seq[index] * HZ) / 8000;
add_timer(&tone->tl);
}
/********************
* set/release tone *
********************/
/*
* tones are relaized by streaming or by special loop commands if supported
* by hardware. when hardware is used, the patterns will be controlled by
* timers.
*/
int
dsp_tone(struct dsp *dsp, int tone)
{
struct pattern *pat;
int i;
struct dsp_tone *tonet = &dsp->tone;
tonet->software = 0;
tonet->hardware = 0;
/* we turn off the tone */
if (!tone) {
if (dsp->features.hfc_loops && timer_pending(&tonet->tl))
del_timer(&tonet->tl);
if (dsp->features.hfc_loops)
dsp_tone_hw_message(dsp, NULL, 0);
tonet->tone = 0;
return 0;
}
pat = NULL;
i = 0;
while (pattern[i].tone) {
if (pattern[i].tone == tone) {
pat = &pattern[i];
break;
}
i++;
}
if (!pat) {
printk(KERN_WARNING "dsp: given tone 0x%x is invalid\n", tone);
return -EINVAL;
}
if (dsp_debug & DEBUG_DSP_TONE)
printk(KERN_DEBUG "%s: now starting tone %d (index=%d)\n",
__func__, tone, 0);
tonet->tone = tone;
tonet->pattern = pat;
tonet->index = 0;
tonet->count = 0;
if (dsp->features.hfc_loops) {
tonet->hardware = 1;
/* set first tone */
dsp_tone_hw_message(dsp, pat->data[0], *(pat->siz[0]));
/* set timer */
if (timer_pending(&tonet->tl))
del_timer(&tonet->tl);
tonet->tl.expires = jiffies + (pat->seq[0] * HZ) / 8000;
add_timer(&tonet->tl);
} else {
tonet->software = 1;
}
return 0;
}
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