Add user space tone generation code
This commit is contained in:
Andreas Eversberg
parent
be40b44515
commit
9bbca1fb9e
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@ -0,0 +1,465 @@
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/*
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* Tone generation
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*
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* Copyright Andreas Eversberg (jolly@eversberg.eu)
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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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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <stddef.h>
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#include "../libdebug/debug.h"
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#include "../libg711/g711.h"
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#include <mISDN/mbuffer.h>
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#include "tones.h"
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#define DATA_S sample_silence
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#define SIZE_S (&sizeof_silence)
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#define DATA_GA sample_german_all
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#define SIZE_GA (&sizeof_german_all)
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#define DATA_GO sample_german_old
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#define SIZE_GO (&sizeof_german_old)
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#define DATA_DT sample_american_dialtone
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#define SIZE_DT (&sizeof_american_dialtone)
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#define DATA_RI sample_american_ringing
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#define SIZE_RI (&sizeof_american_ringing)
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#define DATA_BU sample_american_busy
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#define SIZE_BU (&sizeof_american_busy)
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#define DATA_S1 sample_special1
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#define SIZE_S1 (&sizeof_special1)
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#define DATA_S2 sample_special2
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#define SIZE_S2 (&sizeof_special2)
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#define DATA_S3 sample_special3
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#define SIZE_S3 (&sizeof_special3)
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/***************/
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/* tones loops */
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/***************/
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/* all tones are alaw encoded */
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/* the last sample+1 is in phase with the first sample. the error is low */
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static uint8_t sample_german_all[] = {
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0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
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0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
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0xdc, 0xfc, 0x6c,
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0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
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0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
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0xdc, 0xfc, 0x6c,
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0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
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0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
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0xdc, 0xfc, 0x6c,
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0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
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0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
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0xdc, 0xfc, 0x6c,
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};
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static int sizeof_german_all = sizeof(sample_german_all);
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static uint8_t sample_german_old[] = {
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0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
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0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
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0x8c,
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0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
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0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
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0x8c,
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0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
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0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
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0x8c,
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0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
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0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
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0x8c,
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};
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static int sizeof_german_old = sizeof(sample_german_old);
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static uint8_t sample_american_dialtone[] = {
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0x2a, 0x18, 0x90, 0x6c, 0x4c, 0xbc, 0x4c, 0x6c,
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0x10, 0x58, 0x32, 0xb9, 0x31, 0x2d, 0x8d, 0x0d,
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0x8d, 0x2d, 0x31, 0x99, 0x0f, 0x28, 0x60, 0xf0,
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0xd0, 0x50, 0xd0, 0x30, 0x60, 0x08, 0x8e, 0x67,
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0x09, 0x19, 0x21, 0xe1, 0xd9, 0xb9, 0x29, 0x67,
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0x83, 0x02, 0xce, 0xbe, 0xee, 0x1a, 0x1b, 0xef,
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0xbf, 0xcf, 0x03, 0x82, 0x66, 0x28, 0xb8, 0xd8,
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0xe0, 0x20, 0x18, 0x08, 0x66, 0x8f, 0x09, 0x61,
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0x31, 0xd1, 0x51, 0xd1, 0xf1, 0x61, 0x29, 0x0e,
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0x98, 0x30, 0x2c, 0x8c, 0x0c, 0x8c, 0x2c, 0x30,
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0xb8, 0x33, 0x59, 0x11, 0x6d, 0x4d, 0xbd, 0x4d,
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0x6d, 0x91, 0x19,
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};
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static int sizeof_american_dialtone = sizeof(sample_american_dialtone);
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static uint8_t sample_american_ringing[] = {
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0x2a, 0xe0, 0xac, 0x0c, 0xbc, 0x4c, 0x8c, 0x90,
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0x48, 0xc7, 0xc1, 0xed, 0xcd, 0x4d, 0xcd, 0xed,
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0xc1, 0xb7, 0x08, 0x30, 0xec, 0xcc, 0xcc, 0x8c,
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0x10, 0x58, 0x1a, 0x99, 0x71, 0xed, 0x8d, 0x8d,
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0x2d, 0x41, 0x89, 0x9e, 0x20, 0x70, 0x2c, 0xec,
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0x2c, 0x70, 0x20, 0x86, 0x77, 0xe1, 0x31, 0x11,
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0xd1, 0xf1, 0x81, 0x09, 0xa3, 0x56, 0x58, 0x00,
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0x40, 0xc0, 0x60, 0x38, 0x46, 0x43, 0x57, 0x39,
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0xd9, 0x59, 0x99, 0xc9, 0x77, 0x2f, 0x2e, 0xc6,
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0xd6, 0x28, 0xd6, 0x36, 0x26, 0x2e, 0x8a, 0xa3,
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0x43, 0x63, 0x4b, 0x4a, 0x62, 0x42, 0xa2, 0x8b,
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0x2f, 0x27, 0x37, 0xd7, 0x29, 0xd7, 0xc7, 0x2f,
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0x2e, 0x76, 0xc8, 0x98, 0x58, 0xd8, 0x38, 0x56,
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0x42, 0x47, 0x39, 0x61, 0xc1, 0x41, 0x01, 0x59,
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0x57, 0xa2, 0x08, 0x80, 0xf0, 0xd0, 0x10, 0x30,
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0xe0, 0x76, 0x87, 0x21, 0x71, 0x2d, 0xed, 0x2d,
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0x71, 0x21, 0x9f, 0x88, 0x40, 0x2c, 0x8c, 0x8c,
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0xec, 0x70, 0x98, 0x1b, 0x59, 0x11, 0x8d, 0xcd,
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0xcd, 0xed, 0x31, 0x09, 0xb6, 0xc0, 0xec, 0xcc,
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0x4c, 0xcc, 0xec, 0xc0, 0xc6, 0x49, 0x91, 0x8d,
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0x4d, 0xbd, 0x0d, 0xad, 0xe1,
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};
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static int sizeof_american_ringing = sizeof(sample_american_ringing);
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static uint8_t sample_american_busy[] = {
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0x2a, 0x00, 0x6c, 0x4c, 0x4c, 0x6c, 0xb0, 0x66,
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0x99, 0x11, 0x6d, 0x8d, 0x2d, 0x41, 0xd7, 0x96,
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0x60, 0xf0, 0x70, 0x40, 0x58, 0xf6, 0x53, 0x57,
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0x09, 0x89, 0xd7, 0x5f, 0xe3, 0x2a, 0xe3, 0x5f,
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0xd7, 0x89, 0x09, 0x57, 0x53, 0xf6, 0x58, 0x40,
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0x70, 0xf0, 0x60, 0x96, 0xd7, 0x41, 0x2d, 0x8d,
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0x6d, 0x11, 0x99, 0x66, 0xb0, 0x6c, 0x4c, 0x4c,
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0x6c, 0x00, 0x2a, 0x01, 0x6d, 0x4d, 0x4d, 0x6d,
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0xb1, 0x67, 0x98, 0x10, 0x6c, 0x8c, 0x2c, 0x40,
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0xd6, 0x97, 0x61, 0xf1, 0x71, 0x41, 0x59, 0xf7,
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0x52, 0x56, 0x08, 0x88, 0xd6, 0x5e, 0xe2, 0x2a,
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0xe2, 0x5e, 0xd6, 0x88, 0x08, 0x56, 0x52, 0xf7,
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0x59, 0x41, 0x71, 0xf1, 0x61, 0x97, 0xd6, 0x40,
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0x2c, 0x8c, 0x6c, 0x10, 0x98, 0x67, 0xb1, 0x6d,
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0x4d, 0x4d, 0x6d, 0x01,
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};
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static int sizeof_american_busy = sizeof(sample_american_busy);
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static uint8_t sample_special1[] = {
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0x2a, 0x2c, 0xbc, 0x6c, 0xd6, 0x71, 0xbd, 0x0d,
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0xd9, 0x80, 0xcc, 0x4c, 0x40, 0x39, 0x0d, 0xbd,
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0x11, 0x86, 0xec, 0xbc, 0xec, 0x0e, 0x51, 0xbd,
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0x8d, 0x89, 0x30, 0x4c, 0xcc, 0xe0, 0xe1, 0xcd,
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0x4d, 0x31, 0x88, 0x8c, 0xbc, 0x50, 0x0f, 0xed,
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0xbd, 0xed, 0x87, 0x10, 0xbc, 0x0c, 0x38, 0x41,
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0x4d, 0xcd, 0x81, 0xd8, 0x0c, 0xbc, 0x70, 0xd7,
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0x6d, 0xbd, 0x2d,
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};
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static int sizeof_special1 = sizeof(sample_special1);
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static uint8_t sample_special2[] = {
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0x2a, 0xcc, 0x8c, 0xd7, 0x4d, 0x2d, 0x18, 0xbc,
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0x10, 0xc1, 0xbd, 0xc1, 0x10, 0xbc, 0x18, 0x2d,
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0x4d, 0xd7, 0x8c, 0xcc, 0x2a, 0xcd, 0x8d, 0xd6,
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0x4c, 0x2c, 0x19, 0xbd, 0x11, 0xc0, 0xbc, 0xc0,
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0x11, 0xbd, 0x19, 0x2c, 0x4c, 0xd6, 0x8d, 0xcd,
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0x2a, 0xcc, 0x8c, 0xd7, 0x4d, 0x2d, 0x18, 0xbc,
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0x10, 0xc1, 0xbd, 0xc1, 0x10, 0xbc, 0x18, 0x2d,
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0x4d, 0xd7, 0x8c, 0xcc, 0x2a, 0xcd, 0x8d, 0xd6,
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0x4c, 0x2c, 0x19, 0xbd, 0x11, 0xc0, 0xbc, 0xc0,
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0x11, 0xbd, 0x19, 0x2c, 0x4c, 0xd6, 0x8d, 0xcd,
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};
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static int sizeof_special2 = sizeof(sample_special2);
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static uint8_t sample_special3[] = {
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0x2a, 0xbc, 0x18, 0xcd, 0x11, 0x2c, 0x8c, 0xc1,
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0x4d, 0xd6, 0xbc, 0xd6, 0x4d, 0xc1, 0x8c, 0x2c,
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0x11, 0xcd, 0x18, 0xbc, 0x2a, 0xbd, 0x19, 0xcc,
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0x10, 0x2d, 0x8d, 0xc0, 0x4c, 0xd7, 0xbd, 0xd7,
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0x4c, 0xc0, 0x8d, 0x2d, 0x10, 0xcc, 0x19, 0xbd,
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0x2a, 0xbc, 0x18, 0xcd, 0x11, 0x2c, 0x8c, 0xc1,
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0x4d, 0xd6, 0xbc, 0xd6, 0x4d, 0xc1, 0x8c, 0x2c,
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0x11, 0xcd, 0x18, 0xbc, 0x2a, 0xbd, 0x19, 0xcc,
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0x10, 0x2d, 0x8d, 0xc0, 0x4c, 0xd7, 0xbd, 0xd7,
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0x4c, 0xc0, 0x8d, 0x2d, 0x10, 0xcc, 0x19, 0xbd,
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};
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static int sizeof_special3 = sizeof(sample_special3);
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static uint8_t sample_silence[] = {
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
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};
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static int sizeof_silence = sizeof(sample_silence);
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struct tones_samples {
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int *len;
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uint8_t *data;
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};
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static struct
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tones_samples samples[] = {
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{&sizeof_german_all, sample_german_all},
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{&sizeof_german_old, sample_german_old},
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{&sizeof_american_dialtone, sample_american_dialtone},
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{&sizeof_american_ringing, sample_american_ringing},
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{&sizeof_american_busy, sample_american_busy},
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{&sizeof_special1, sample_special1},
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{&sizeof_special2, sample_special2},
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{&sizeof_special3, sample_special3},
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{NULL, NULL},
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};
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/***********************************
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* generate ulaw from alaw samples *
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***********************************/
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void isdn_tone_generate_ulaw_samples(void)
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{
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int i;
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int16_t *audio;
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int audio_len;
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uint8_t *data;
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int len;
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i = 0;
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while (samples[i].len) {
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g711_decode_alaw_flipped(samples[i].data, *samples[i].len, (uint8_t **)&audio, &audio_len);
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g711_encode_ulaw_flipped((uint8_t *)audio, audio_len, &data, &len);
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memcpy(samples[i].data, data, len);
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free(audio);
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free(data);
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i++;
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}
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}
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/****************************
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* tone sequence definition *
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****************************/
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static struct pattern {
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int tone;
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uint8_t *data[10];
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int *siz[10];
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int seq[10];
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} pattern[] = {
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{TONE_GERMAN_DIALTONE,
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{DATA_GA, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{SIZE_GA, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{1900, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
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{TONE_GERMAN_OLDDIALTONE,
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{DATA_GO, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{SIZE_GO, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{7956, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
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{TONE_AMERICAN_DIALTONE,
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{DATA_DT, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{SIZE_DT, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{8008, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
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{TONE_GERMAN_DIALPBX,
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{DATA_GA, DATA_S, DATA_GA, DATA_S, DATA_GA, DATA_S, NULL, NULL, NULL,
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NULL},
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{SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, NULL, NULL, NULL,
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NULL},
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{2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
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{TONE_GERMAN_OLDDIALPBX,
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{DATA_GO, DATA_S, DATA_GO, DATA_S, DATA_GO, DATA_S, NULL, NULL, NULL,
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NULL},
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{SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, NULL, NULL, NULL,
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NULL},
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{2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
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{TONE_AMERICAN_DIALPBX,
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{DATA_DT, DATA_S, DATA_DT, DATA_S, DATA_DT, DATA_S, NULL, NULL, NULL,
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NULL},
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{SIZE_DT, SIZE_S, SIZE_DT, SIZE_S, SIZE_DT, SIZE_S, NULL, NULL, NULL,
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NULL},
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{2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
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{TONE_GERMAN_RINGING,
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{DATA_GA, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{SIZE_GA, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{8000, 32000, 0, 0, 0, 0, 0, 0, 0, 0} },
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{TONE_GERMAN_OLDRINGING,
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{DATA_GO, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{SIZE_GO, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{8000, 40000, 0, 0, 0, 0, 0, 0, 0, 0} },
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{TONE_AMERICAN_RINGING,
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{DATA_RI, DATA_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{SIZE_RI, SIZE_S, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
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{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 *
|
||||
******************/
|
||||
|
||||
/* 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
|
||||
*/
|
||||
void isdn_tone_copy(struct isdn_tone *t, uint8_t *data, int len)
|
||||
{
|
||||
int index, count, start, num;
|
||||
struct pattern *pat;
|
||||
|
||||
/* if we have no tone, we do not overwrite data */
|
||||
if (!t->tone)
|
||||
return;
|
||||
|
||||
/* process pattern */
|
||||
pat = (struct pattern *)t->pattern;
|
||||
/* points to the current pattern */
|
||||
index = t->index; /* gives current sequence index */
|
||||
count = t->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;
|
||||
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;
|
||||
}
|
||||
|
||||
t->index = index;
|
||||
t->count = count;
|
||||
}
|
||||
|
||||
|
||||
/********************
|
||||
* set/release tone *
|
||||
********************/
|
||||
|
||||
int isdn_tone_set(struct isdn_tone *t, int tone)
|
||||
{
|
||||
struct pattern *pat;
|
||||
int i;
|
||||
|
||||
/* we turn off the tone */
|
||||
if (!tone) {
|
||||
t->tone = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
pat = NULL;
|
||||
i = 0;
|
||||
while (pattern[i].tone) {
|
||||
if (pattern[i].tone == tone) {
|
||||
pat = &pattern[i];
|
||||
break;
|
||||
}
|
||||
i++;
|
||||
}
|
||||
if (!pat) {
|
||||
PDEBUG(DISDN, DEBUG_ERROR, "given tone 0x%x is invalid\n", tone);
|
||||
return -EINVAL;
|
||||
}
|
||||
PDEBUG(DISDN, DEBUG_DEBUG, "playing given tone 0x%x\n", tone);
|
||||
t->tone = tone;
|
||||
t->pattern = pat;
|
||||
t->index = 0;
|
||||
t->count = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
|
||||
struct isdn_tone {
|
||||
int tone;
|
||||
void *pattern;
|
||||
int count;
|
||||
int index;
|
||||
};
|
||||
|
||||
void isdn_tone_generate_ulaw_samples(void);
|
||||
void isdn_tone_copy(struct isdn_tone *t, uint8_t *data, int len);
|
||||
int isdn_tone_set(struct isdn_tone *t, int tone);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue