patch-2.0.31 linux/drivers/isdn/isdn_audio.c
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- Lines: 1054
- Date:
Mon Aug 4 17:34:00 1997
- Orig file:
v2.0.30/linux/drivers/isdn/isdn_audio.c
- Orig date:
Fri Jun 7 06:02:40 1996
diff -u --recursive --new-file v2.0.30/linux/drivers/isdn/isdn_audio.c linux/drivers/isdn/isdn_audio.c
@@ -1,10 +1,10 @@
-/* $Id: isdn_audio.c,v 1.6 1996/06/06 14:43:31 fritz Exp $
- *
+/* $Id: isdn_audio.c,v 1.8 1997/03/02 14:29:16 fritz Exp $
+
* Linux ISDN subsystem, audio conversion and compression (linklevel).
*
* Copyright 1994,95,96 by Fritz Elfert (fritz@wuemaus.franken.de)
* DTMF code (c) 1996 by Christian Mock (cm@kukuruz.ping.at)
- *
+ *
* 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)
@@ -17,9 +17,15 @@
*
* 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.
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Log: isdn_audio.c,v $
+ * Revision 1.8 1997/03/02 14:29:16 fritz
+ * More ttyI related cleanup.
+ *
+ * Revision 1.7 1997/02/03 22:44:11 fritz
+ * Reformatted according CodingStyle
+ *
* Revision 1.6 1996/06/06 14:43:31 fritz
* Changed to support DTMF decoding on audio playback also.
*
@@ -47,154 +53,158 @@
#include "isdn_audio.h"
#include "isdn_common.h"
-char *isdn_audio_revision = "$Revision: 1.6 $";
+char *isdn_audio_revision = "$Revision: 1.8 $";
/*
* Misc. lookup-tables.
*/
/* ulaw -> signed 16-bit */
-static short isdn_audio_ulaw_to_s16[] = {
- 0x8284, 0x8684, 0x8a84, 0x8e84, 0x9284, 0x9684, 0x9a84, 0x9e84,
- 0xa284, 0xa684, 0xaa84, 0xae84, 0xb284, 0xb684, 0xba84, 0xbe84,
- 0xc184, 0xc384, 0xc584, 0xc784, 0xc984, 0xcb84, 0xcd84, 0xcf84,
- 0xd184, 0xd384, 0xd584, 0xd784, 0xd984, 0xdb84, 0xdd84, 0xdf84,
- 0xe104, 0xe204, 0xe304, 0xe404, 0xe504, 0xe604, 0xe704, 0xe804,
- 0xe904, 0xea04, 0xeb04, 0xec04, 0xed04, 0xee04, 0xef04, 0xf004,
- 0xf0c4, 0xf144, 0xf1c4, 0xf244, 0xf2c4, 0xf344, 0xf3c4, 0xf444,
- 0xf4c4, 0xf544, 0xf5c4, 0xf644, 0xf6c4, 0xf744, 0xf7c4, 0xf844,
- 0xf8a4, 0xf8e4, 0xf924, 0xf964, 0xf9a4, 0xf9e4, 0xfa24, 0xfa64,
- 0xfaa4, 0xfae4, 0xfb24, 0xfb64, 0xfba4, 0xfbe4, 0xfc24, 0xfc64,
- 0xfc94, 0xfcb4, 0xfcd4, 0xfcf4, 0xfd14, 0xfd34, 0xfd54, 0xfd74,
- 0xfd94, 0xfdb4, 0xfdd4, 0xfdf4, 0xfe14, 0xfe34, 0xfe54, 0xfe74,
- 0xfe8c, 0xfe9c, 0xfeac, 0xfebc, 0xfecc, 0xfedc, 0xfeec, 0xfefc,
- 0xff0c, 0xff1c, 0xff2c, 0xff3c, 0xff4c, 0xff5c, 0xff6c, 0xff7c,
- 0xff88, 0xff90, 0xff98, 0xffa0, 0xffa8, 0xffb0, 0xffb8, 0xffc0,
- 0xffc8, 0xffd0, 0xffd8, 0xffe0, 0xffe8, 0xfff0, 0xfff8, 0x0000,
- 0x7d7c, 0x797c, 0x757c, 0x717c, 0x6d7c, 0x697c, 0x657c, 0x617c,
- 0x5d7c, 0x597c, 0x557c, 0x517c, 0x4d7c, 0x497c, 0x457c, 0x417c,
- 0x3e7c, 0x3c7c, 0x3a7c, 0x387c, 0x367c, 0x347c, 0x327c, 0x307c,
- 0x2e7c, 0x2c7c, 0x2a7c, 0x287c, 0x267c, 0x247c, 0x227c, 0x207c,
- 0x1efc, 0x1dfc, 0x1cfc, 0x1bfc, 0x1afc, 0x19fc, 0x18fc, 0x17fc,
- 0x16fc, 0x15fc, 0x14fc, 0x13fc, 0x12fc, 0x11fc, 0x10fc, 0x0ffc,
- 0x0f3c, 0x0ebc, 0x0e3c, 0x0dbc, 0x0d3c, 0x0cbc, 0x0c3c, 0x0bbc,
- 0x0b3c, 0x0abc, 0x0a3c, 0x09bc, 0x093c, 0x08bc, 0x083c, 0x07bc,
- 0x075c, 0x071c, 0x06dc, 0x069c, 0x065c, 0x061c, 0x05dc, 0x059c,
- 0x055c, 0x051c, 0x04dc, 0x049c, 0x045c, 0x041c, 0x03dc, 0x039c,
- 0x036c, 0x034c, 0x032c, 0x030c, 0x02ec, 0x02cc, 0x02ac, 0x028c,
- 0x026c, 0x024c, 0x022c, 0x020c, 0x01ec, 0x01cc, 0x01ac, 0x018c,
- 0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104,
- 0x00f4, 0x00e4, 0x00d4, 0x00c4, 0x00b4, 0x00a4, 0x0094, 0x0084,
- 0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040,
- 0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000
+static short isdn_audio_ulaw_to_s16[] =
+{
+ 0x8284, 0x8684, 0x8a84, 0x8e84, 0x9284, 0x9684, 0x9a84, 0x9e84,
+ 0xa284, 0xa684, 0xaa84, 0xae84, 0xb284, 0xb684, 0xba84, 0xbe84,
+ 0xc184, 0xc384, 0xc584, 0xc784, 0xc984, 0xcb84, 0xcd84, 0xcf84,
+ 0xd184, 0xd384, 0xd584, 0xd784, 0xd984, 0xdb84, 0xdd84, 0xdf84,
+ 0xe104, 0xe204, 0xe304, 0xe404, 0xe504, 0xe604, 0xe704, 0xe804,
+ 0xe904, 0xea04, 0xeb04, 0xec04, 0xed04, 0xee04, 0xef04, 0xf004,
+ 0xf0c4, 0xf144, 0xf1c4, 0xf244, 0xf2c4, 0xf344, 0xf3c4, 0xf444,
+ 0xf4c4, 0xf544, 0xf5c4, 0xf644, 0xf6c4, 0xf744, 0xf7c4, 0xf844,
+ 0xf8a4, 0xf8e4, 0xf924, 0xf964, 0xf9a4, 0xf9e4, 0xfa24, 0xfa64,
+ 0xfaa4, 0xfae4, 0xfb24, 0xfb64, 0xfba4, 0xfbe4, 0xfc24, 0xfc64,
+ 0xfc94, 0xfcb4, 0xfcd4, 0xfcf4, 0xfd14, 0xfd34, 0xfd54, 0xfd74,
+ 0xfd94, 0xfdb4, 0xfdd4, 0xfdf4, 0xfe14, 0xfe34, 0xfe54, 0xfe74,
+ 0xfe8c, 0xfe9c, 0xfeac, 0xfebc, 0xfecc, 0xfedc, 0xfeec, 0xfefc,
+ 0xff0c, 0xff1c, 0xff2c, 0xff3c, 0xff4c, 0xff5c, 0xff6c, 0xff7c,
+ 0xff88, 0xff90, 0xff98, 0xffa0, 0xffa8, 0xffb0, 0xffb8, 0xffc0,
+ 0xffc8, 0xffd0, 0xffd8, 0xffe0, 0xffe8, 0xfff0, 0xfff8, 0x0000,
+ 0x7d7c, 0x797c, 0x757c, 0x717c, 0x6d7c, 0x697c, 0x657c, 0x617c,
+ 0x5d7c, 0x597c, 0x557c, 0x517c, 0x4d7c, 0x497c, 0x457c, 0x417c,
+ 0x3e7c, 0x3c7c, 0x3a7c, 0x387c, 0x367c, 0x347c, 0x327c, 0x307c,
+ 0x2e7c, 0x2c7c, 0x2a7c, 0x287c, 0x267c, 0x247c, 0x227c, 0x207c,
+ 0x1efc, 0x1dfc, 0x1cfc, 0x1bfc, 0x1afc, 0x19fc, 0x18fc, 0x17fc,
+ 0x16fc, 0x15fc, 0x14fc, 0x13fc, 0x12fc, 0x11fc, 0x10fc, 0x0ffc,
+ 0x0f3c, 0x0ebc, 0x0e3c, 0x0dbc, 0x0d3c, 0x0cbc, 0x0c3c, 0x0bbc,
+ 0x0b3c, 0x0abc, 0x0a3c, 0x09bc, 0x093c, 0x08bc, 0x083c, 0x07bc,
+ 0x075c, 0x071c, 0x06dc, 0x069c, 0x065c, 0x061c, 0x05dc, 0x059c,
+ 0x055c, 0x051c, 0x04dc, 0x049c, 0x045c, 0x041c, 0x03dc, 0x039c,
+ 0x036c, 0x034c, 0x032c, 0x030c, 0x02ec, 0x02cc, 0x02ac, 0x028c,
+ 0x026c, 0x024c, 0x022c, 0x020c, 0x01ec, 0x01cc, 0x01ac, 0x018c,
+ 0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104,
+ 0x00f4, 0x00e4, 0x00d4, 0x00c4, 0x00b4, 0x00a4, 0x0094, 0x0084,
+ 0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040,
+ 0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000
};
/* alaw -> signed 16-bit */
-static short isdn_audio_alaw_to_s16[] = {
- 0x13fc, 0xec04, 0x0144, 0xfebc, 0x517c, 0xae84, 0x051c, 0xfae4,
- 0x0a3c, 0xf5c4, 0x0048, 0xffb8, 0x287c, 0xd784, 0x028c, 0xfd74,
- 0x1bfc, 0xe404, 0x01cc, 0xfe34, 0x717c, 0x8e84, 0x071c, 0xf8e4,
- 0x0e3c, 0xf1c4, 0x00c4, 0xff3c, 0x387c, 0xc784, 0x039c, 0xfc64,
- 0x0ffc, 0xf004, 0x0104, 0xfefc, 0x417c, 0xbe84, 0x041c, 0xfbe4,
- 0x083c, 0xf7c4, 0x0008, 0xfff8, 0x207c, 0xdf84, 0x020c, 0xfdf4,
- 0x17fc, 0xe804, 0x018c, 0xfe74, 0x617c, 0x9e84, 0x061c, 0xf9e4,
- 0x0c3c, 0xf3c4, 0x0084, 0xff7c, 0x307c, 0xcf84, 0x030c, 0xfcf4,
- 0x15fc, 0xea04, 0x0164, 0xfe9c, 0x597c, 0xa684, 0x059c, 0xfa64,
- 0x0b3c, 0xf4c4, 0x0068, 0xff98, 0x2c7c, 0xd384, 0x02cc, 0xfd34,
- 0x1dfc, 0xe204, 0x01ec, 0xfe14, 0x797c, 0x8684, 0x07bc, 0xf844,
- 0x0f3c, 0xf0c4, 0x00e4, 0xff1c, 0x3c7c, 0xc384, 0x03dc, 0xfc24,
- 0x11fc, 0xee04, 0x0124, 0xfedc, 0x497c, 0xb684, 0x049c, 0xfb64,
- 0x093c, 0xf6c4, 0x0028, 0xffd8, 0x247c, 0xdb84, 0x024c, 0xfdb4,
- 0x19fc, 0xe604, 0x01ac, 0xfe54, 0x697c, 0x9684, 0x069c, 0xf964,
- 0x0d3c, 0xf2c4, 0x00a4, 0xff5c, 0x347c, 0xcb84, 0x034c, 0xfcb4,
- 0x12fc, 0xed04, 0x0134, 0xfecc, 0x4d7c, 0xb284, 0x04dc, 0xfb24,
- 0x09bc, 0xf644, 0x0038, 0xffc8, 0x267c, 0xd984, 0x026c, 0xfd94,
- 0x1afc, 0xe504, 0x01ac, 0xfe54, 0x6d7c, 0x9284, 0x06dc, 0xf924,
- 0x0dbc, 0xf244, 0x00b4, 0xff4c, 0x367c, 0xc984, 0x036c, 0xfc94,
- 0x0f3c, 0xf0c4, 0x00f4, 0xff0c, 0x3e7c, 0xc184, 0x03dc, 0xfc24,
- 0x07bc, 0xf844, 0x0008, 0xfff8, 0x1efc, 0xe104, 0x01ec, 0xfe14,
- 0x16fc, 0xe904, 0x0174, 0xfe8c, 0x5d7c, 0xa284, 0x05dc, 0xfa24,
- 0x0bbc, 0xf444, 0x0078, 0xff88, 0x2e7c, 0xd184, 0x02ec, 0xfd14,
- 0x14fc, 0xeb04, 0x0154, 0xfeac, 0x557c, 0xaa84, 0x055c, 0xfaa4,
- 0x0abc, 0xf544, 0x0058, 0xffa8, 0x2a7c, 0xd584, 0x02ac, 0xfd54,
- 0x1cfc, 0xe304, 0x01cc, 0xfe34, 0x757c, 0x8a84, 0x075c, 0xf8a4,
- 0x0ebc, 0xf144, 0x00d4, 0xff2c, 0x3a7c, 0xc584, 0x039c, 0xfc64,
- 0x10fc, 0xef04, 0x0114, 0xfeec, 0x457c, 0xba84, 0x045c, 0xfba4,
- 0x08bc, 0xf744, 0x0018, 0xffe8, 0x227c, 0xdd84, 0x022c, 0xfdd4,
- 0x18fc, 0xe704, 0x018c, 0xfe74, 0x657c, 0x9a84, 0x065c, 0xf9a4,
- 0x0cbc, 0xf344, 0x0094, 0xff6c, 0x327c, 0xcd84, 0x032c, 0xfcd4
+static short isdn_audio_alaw_to_s16[] =
+{
+ 0x13fc, 0xec04, 0x0144, 0xfebc, 0x517c, 0xae84, 0x051c, 0xfae4,
+ 0x0a3c, 0xf5c4, 0x0048, 0xffb8, 0x287c, 0xd784, 0x028c, 0xfd74,
+ 0x1bfc, 0xe404, 0x01cc, 0xfe34, 0x717c, 0x8e84, 0x071c, 0xf8e4,
+ 0x0e3c, 0xf1c4, 0x00c4, 0xff3c, 0x387c, 0xc784, 0x039c, 0xfc64,
+ 0x0ffc, 0xf004, 0x0104, 0xfefc, 0x417c, 0xbe84, 0x041c, 0xfbe4,
+ 0x083c, 0xf7c4, 0x0008, 0xfff8, 0x207c, 0xdf84, 0x020c, 0xfdf4,
+ 0x17fc, 0xe804, 0x018c, 0xfe74, 0x617c, 0x9e84, 0x061c, 0xf9e4,
+ 0x0c3c, 0xf3c4, 0x0084, 0xff7c, 0x307c, 0xcf84, 0x030c, 0xfcf4,
+ 0x15fc, 0xea04, 0x0164, 0xfe9c, 0x597c, 0xa684, 0x059c, 0xfa64,
+ 0x0b3c, 0xf4c4, 0x0068, 0xff98, 0x2c7c, 0xd384, 0x02cc, 0xfd34,
+ 0x1dfc, 0xe204, 0x01ec, 0xfe14, 0x797c, 0x8684, 0x07bc, 0xf844,
+ 0x0f3c, 0xf0c4, 0x00e4, 0xff1c, 0x3c7c, 0xc384, 0x03dc, 0xfc24,
+ 0x11fc, 0xee04, 0x0124, 0xfedc, 0x497c, 0xb684, 0x049c, 0xfb64,
+ 0x093c, 0xf6c4, 0x0028, 0xffd8, 0x247c, 0xdb84, 0x024c, 0xfdb4,
+ 0x19fc, 0xe604, 0x01ac, 0xfe54, 0x697c, 0x9684, 0x069c, 0xf964,
+ 0x0d3c, 0xf2c4, 0x00a4, 0xff5c, 0x347c, 0xcb84, 0x034c, 0xfcb4,
+ 0x12fc, 0xed04, 0x0134, 0xfecc, 0x4d7c, 0xb284, 0x04dc, 0xfb24,
+ 0x09bc, 0xf644, 0x0038, 0xffc8, 0x267c, 0xd984, 0x026c, 0xfd94,
+ 0x1afc, 0xe504, 0x01ac, 0xfe54, 0x6d7c, 0x9284, 0x06dc, 0xf924,
+ 0x0dbc, 0xf244, 0x00b4, 0xff4c, 0x367c, 0xc984, 0x036c, 0xfc94,
+ 0x0f3c, 0xf0c4, 0x00f4, 0xff0c, 0x3e7c, 0xc184, 0x03dc, 0xfc24,
+ 0x07bc, 0xf844, 0x0008, 0xfff8, 0x1efc, 0xe104, 0x01ec, 0xfe14,
+ 0x16fc, 0xe904, 0x0174, 0xfe8c, 0x5d7c, 0xa284, 0x05dc, 0xfa24,
+ 0x0bbc, 0xf444, 0x0078, 0xff88, 0x2e7c, 0xd184, 0x02ec, 0xfd14,
+ 0x14fc, 0xeb04, 0x0154, 0xfeac, 0x557c, 0xaa84, 0x055c, 0xfaa4,
+ 0x0abc, 0xf544, 0x0058, 0xffa8, 0x2a7c, 0xd584, 0x02ac, 0xfd54,
+ 0x1cfc, 0xe304, 0x01cc, 0xfe34, 0x757c, 0x8a84, 0x075c, 0xf8a4,
+ 0x0ebc, 0xf144, 0x00d4, 0xff2c, 0x3a7c, 0xc584, 0x039c, 0xfc64,
+ 0x10fc, 0xef04, 0x0114, 0xfeec, 0x457c, 0xba84, 0x045c, 0xfba4,
+ 0x08bc, 0xf744, 0x0018, 0xffe8, 0x227c, 0xdd84, 0x022c, 0xfdd4,
+ 0x18fc, 0xe704, 0x018c, 0xfe74, 0x657c, 0x9a84, 0x065c, 0xf9a4,
+ 0x0cbc, 0xf344, 0x0094, 0xff6c, 0x327c, 0xcd84, 0x032c, 0xfcd4
};
/* alaw -> ulaw */
-static char isdn_audio_alaw_to_ulaw[] = {
- 0xab, 0x2b, 0xe3, 0x63, 0x8b, 0x0b, 0xc9, 0x49,
- 0xba, 0x3a, 0xf6, 0x76, 0x9b, 0x1b, 0xd7, 0x57,
- 0xa3, 0x23, 0xdd, 0x5d, 0x83, 0x03, 0xc1, 0x41,
- 0xb2, 0x32, 0xeb, 0x6b, 0x93, 0x13, 0xcf, 0x4f,
- 0xaf, 0x2f, 0xe7, 0x67, 0x8f, 0x0f, 0xcd, 0x4d,
- 0xbe, 0x3e, 0xfe, 0x7e, 0x9f, 0x1f, 0xdb, 0x5b,
- 0xa7, 0x27, 0xdf, 0x5f, 0x87, 0x07, 0xc5, 0x45,
- 0xb6, 0x36, 0xef, 0x6f, 0x97, 0x17, 0xd3, 0x53,
- 0xa9, 0x29, 0xe1, 0x61, 0x89, 0x09, 0xc7, 0x47,
- 0xb8, 0x38, 0xf2, 0x72, 0x99, 0x19, 0xd5, 0x55,
- 0xa1, 0x21, 0xdc, 0x5c, 0x81, 0x01, 0xbf, 0x3f,
- 0xb0, 0x30, 0xe9, 0x69, 0x91, 0x11, 0xce, 0x4e,
- 0xad, 0x2d, 0xe5, 0x65, 0x8d, 0x0d, 0xcb, 0x4b,
- 0xbc, 0x3c, 0xfa, 0x7a, 0x9d, 0x1d, 0xd9, 0x59,
- 0xa5, 0x25, 0xde, 0x5e, 0x85, 0x05, 0xc3, 0x43,
- 0xb4, 0x34, 0xed, 0x6d, 0x95, 0x15, 0xd1, 0x51,
- 0xac, 0x2c, 0xe4, 0x64, 0x8c, 0x0c, 0xca, 0x4a,
- 0xbb, 0x3b, 0xf8, 0x78, 0x9c, 0x1c, 0xd8, 0x58,
- 0xa4, 0x24, 0xde, 0x5e, 0x84, 0x04, 0xc2, 0x42,
- 0xb3, 0x33, 0xec, 0x6c, 0x94, 0x14, 0xd0, 0x50,
- 0xb0, 0x30, 0xe8, 0x68, 0x90, 0x10, 0xce, 0x4e,
- 0xbf, 0x3f, 0xfe, 0x7e, 0xa0, 0x20, 0xdc, 0x5c,
- 0xa8, 0x28, 0xe0, 0x60, 0x88, 0x08, 0xc6, 0x46,
- 0xb7, 0x37, 0xf0, 0x70, 0x98, 0x18, 0xd4, 0x54,
- 0xaa, 0x2a, 0xe2, 0x62, 0x8a, 0x0a, 0xc8, 0x48,
- 0xb9, 0x39, 0xf4, 0x74, 0x9a, 0x1a, 0xd6, 0x56,
- 0xa2, 0x22, 0xdd, 0x5d, 0x82, 0x02, 0xc0, 0x40,
- 0xb1, 0x31, 0xea, 0x6a, 0x92, 0x12, 0xcf, 0x4f,
- 0xae, 0x2e, 0xe6, 0x66, 0x8e, 0x0e, 0xcc, 0x4c,
- 0xbd, 0x3d, 0xfc, 0x7c, 0x9e, 0x1e, 0xda, 0x5a,
- 0xa6, 0x26, 0xdf, 0x5f, 0x86, 0x06, 0xc4, 0x44,
- 0xb5, 0x35, 0xee, 0x6e, 0x96, 0x16, 0xd2, 0x52
+static char isdn_audio_alaw_to_ulaw[] =
+{
+ 0xab, 0x2b, 0xe3, 0x63, 0x8b, 0x0b, 0xc9, 0x49,
+ 0xba, 0x3a, 0xf6, 0x76, 0x9b, 0x1b, 0xd7, 0x57,
+ 0xa3, 0x23, 0xdd, 0x5d, 0x83, 0x03, 0xc1, 0x41,
+ 0xb2, 0x32, 0xeb, 0x6b, 0x93, 0x13, 0xcf, 0x4f,
+ 0xaf, 0x2f, 0xe7, 0x67, 0x8f, 0x0f, 0xcd, 0x4d,
+ 0xbe, 0x3e, 0xfe, 0x7e, 0x9f, 0x1f, 0xdb, 0x5b,
+ 0xa7, 0x27, 0xdf, 0x5f, 0x87, 0x07, 0xc5, 0x45,
+ 0xb6, 0x36, 0xef, 0x6f, 0x97, 0x17, 0xd3, 0x53,
+ 0xa9, 0x29, 0xe1, 0x61, 0x89, 0x09, 0xc7, 0x47,
+ 0xb8, 0x38, 0xf2, 0x72, 0x99, 0x19, 0xd5, 0x55,
+ 0xa1, 0x21, 0xdc, 0x5c, 0x81, 0x01, 0xbf, 0x3f,
+ 0xb0, 0x30, 0xe9, 0x69, 0x91, 0x11, 0xce, 0x4e,
+ 0xad, 0x2d, 0xe5, 0x65, 0x8d, 0x0d, 0xcb, 0x4b,
+ 0xbc, 0x3c, 0xfa, 0x7a, 0x9d, 0x1d, 0xd9, 0x59,
+ 0xa5, 0x25, 0xde, 0x5e, 0x85, 0x05, 0xc3, 0x43,
+ 0xb4, 0x34, 0xed, 0x6d, 0x95, 0x15, 0xd1, 0x51,
+ 0xac, 0x2c, 0xe4, 0x64, 0x8c, 0x0c, 0xca, 0x4a,
+ 0xbb, 0x3b, 0xf8, 0x78, 0x9c, 0x1c, 0xd8, 0x58,
+ 0xa4, 0x24, 0xde, 0x5e, 0x84, 0x04, 0xc2, 0x42,
+ 0xb3, 0x33, 0xec, 0x6c, 0x94, 0x14, 0xd0, 0x50,
+ 0xb0, 0x30, 0xe8, 0x68, 0x90, 0x10, 0xce, 0x4e,
+ 0xbf, 0x3f, 0xfe, 0x7e, 0xa0, 0x20, 0xdc, 0x5c,
+ 0xa8, 0x28, 0xe0, 0x60, 0x88, 0x08, 0xc6, 0x46,
+ 0xb7, 0x37, 0xf0, 0x70, 0x98, 0x18, 0xd4, 0x54,
+ 0xaa, 0x2a, 0xe2, 0x62, 0x8a, 0x0a, 0xc8, 0x48,
+ 0xb9, 0x39, 0xf4, 0x74, 0x9a, 0x1a, 0xd6, 0x56,
+ 0xa2, 0x22, 0xdd, 0x5d, 0x82, 0x02, 0xc0, 0x40,
+ 0xb1, 0x31, 0xea, 0x6a, 0x92, 0x12, 0xcf, 0x4f,
+ 0xae, 0x2e, 0xe6, 0x66, 0x8e, 0x0e, 0xcc, 0x4c,
+ 0xbd, 0x3d, 0xfc, 0x7c, 0x9e, 0x1e, 0xda, 0x5a,
+ 0xa6, 0x26, 0xdf, 0x5f, 0x86, 0x06, 0xc4, 0x44,
+ 0xb5, 0x35, 0xee, 0x6e, 0x96, 0x16, 0xd2, 0x52
};
/* ulaw -> alaw */
-static char isdn_audio_ulaw_to_alaw[] = {
- 0xab, 0x55, 0xd5, 0x15, 0x95, 0x75, 0xf5, 0x35,
- 0xb5, 0x45, 0xc5, 0x05, 0x85, 0x65, 0xe5, 0x25,
- 0xa5, 0x5d, 0xdd, 0x1d, 0x9d, 0x7d, 0xfd, 0x3d,
- 0xbd, 0x4d, 0xcd, 0x0d, 0x8d, 0x6d, 0xed, 0x2d,
- 0xad, 0x51, 0xd1, 0x11, 0x91, 0x71, 0xf1, 0x31,
- 0xb1, 0x41, 0xc1, 0x01, 0x81, 0x61, 0xe1, 0x21,
- 0x59, 0xd9, 0x19, 0x99, 0x79, 0xf9, 0x39, 0xb9,
- 0x49, 0xc9, 0x09, 0x89, 0x69, 0xe9, 0x29, 0xa9,
- 0xd7, 0x17, 0x97, 0x77, 0xf7, 0x37, 0xb7, 0x47,
- 0xc7, 0x07, 0x87, 0x67, 0xe7, 0x27, 0xa7, 0xdf,
- 0x9f, 0x7f, 0xff, 0x3f, 0xbf, 0x4f, 0xcf, 0x0f,
- 0x8f, 0x6f, 0xef, 0x2f, 0x53, 0x13, 0x73, 0x33,
- 0xb3, 0x43, 0xc3, 0x03, 0x83, 0x63, 0xe3, 0x23,
- 0xa3, 0x5b, 0xdb, 0x1b, 0x9b, 0x7b, 0xfb, 0x3b,
- 0xbb, 0xbb, 0x4b, 0x4b, 0xcb, 0xcb, 0x0b, 0x0b,
- 0x8b, 0x8b, 0x6b, 0x6b, 0xeb, 0xeb, 0x2b, 0x2b,
- 0xab, 0x54, 0xd4, 0x14, 0x94, 0x74, 0xf4, 0x34,
- 0xb4, 0x44, 0xc4, 0x04, 0x84, 0x64, 0xe4, 0x24,
- 0xa4, 0x5c, 0xdc, 0x1c, 0x9c, 0x7c, 0xfc, 0x3c,
- 0xbc, 0x4c, 0xcc, 0x0c, 0x8c, 0x6c, 0xec, 0x2c,
- 0xac, 0x50, 0xd0, 0x10, 0x90, 0x70, 0xf0, 0x30,
- 0xb0, 0x40, 0xc0, 0x00, 0x80, 0x60, 0xe0, 0x20,
- 0x58, 0xd8, 0x18, 0x98, 0x78, 0xf8, 0x38, 0xb8,
- 0x48, 0xc8, 0x08, 0x88, 0x68, 0xe8, 0x28, 0xa8,
- 0xd6, 0x16, 0x96, 0x76, 0xf6, 0x36, 0xb6, 0x46,
- 0xc6, 0x06, 0x86, 0x66, 0xe6, 0x26, 0xa6, 0xde,
- 0x9e, 0x7e, 0xfe, 0x3e, 0xbe, 0x4e, 0xce, 0x0e,
- 0x8e, 0x6e, 0xee, 0x2e, 0x52, 0x12, 0x72, 0x32,
- 0xb2, 0x42, 0xc2, 0x02, 0x82, 0x62, 0xe2, 0x22,
- 0xa2, 0x5a, 0xda, 0x1a, 0x9a, 0x7a, 0xfa, 0x3a,
- 0xba, 0xba, 0x4a, 0x4a, 0xca, 0xca, 0x0a, 0x0a,
- 0x8a, 0x8a, 0x6a, 0x6a, 0xea, 0xea, 0x2a, 0x2a
+static char isdn_audio_ulaw_to_alaw[] =
+{
+ 0xab, 0x55, 0xd5, 0x15, 0x95, 0x75, 0xf5, 0x35,
+ 0xb5, 0x45, 0xc5, 0x05, 0x85, 0x65, 0xe5, 0x25,
+ 0xa5, 0x5d, 0xdd, 0x1d, 0x9d, 0x7d, 0xfd, 0x3d,
+ 0xbd, 0x4d, 0xcd, 0x0d, 0x8d, 0x6d, 0xed, 0x2d,
+ 0xad, 0x51, 0xd1, 0x11, 0x91, 0x71, 0xf1, 0x31,
+ 0xb1, 0x41, 0xc1, 0x01, 0x81, 0x61, 0xe1, 0x21,
+ 0x59, 0xd9, 0x19, 0x99, 0x79, 0xf9, 0x39, 0xb9,
+ 0x49, 0xc9, 0x09, 0x89, 0x69, 0xe9, 0x29, 0xa9,
+ 0xd7, 0x17, 0x97, 0x77, 0xf7, 0x37, 0xb7, 0x47,
+ 0xc7, 0x07, 0x87, 0x67, 0xe7, 0x27, 0xa7, 0xdf,
+ 0x9f, 0x7f, 0xff, 0x3f, 0xbf, 0x4f, 0xcf, 0x0f,
+ 0x8f, 0x6f, 0xef, 0x2f, 0x53, 0x13, 0x73, 0x33,
+ 0xb3, 0x43, 0xc3, 0x03, 0x83, 0x63, 0xe3, 0x23,
+ 0xa3, 0x5b, 0xdb, 0x1b, 0x9b, 0x7b, 0xfb, 0x3b,
+ 0xbb, 0xbb, 0x4b, 0x4b, 0xcb, 0xcb, 0x0b, 0x0b,
+ 0x8b, 0x8b, 0x6b, 0x6b, 0xeb, 0xeb, 0x2b, 0x2b,
+ 0xab, 0x54, 0xd4, 0x14, 0x94, 0x74, 0xf4, 0x34,
+ 0xb4, 0x44, 0xc4, 0x04, 0x84, 0x64, 0xe4, 0x24,
+ 0xa4, 0x5c, 0xdc, 0x1c, 0x9c, 0x7c, 0xfc, 0x3c,
+ 0xbc, 0x4c, 0xcc, 0x0c, 0x8c, 0x6c, 0xec, 0x2c,
+ 0xac, 0x50, 0xd0, 0x10, 0x90, 0x70, 0xf0, 0x30,
+ 0xb0, 0x40, 0xc0, 0x00, 0x80, 0x60, 0xe0, 0x20,
+ 0x58, 0xd8, 0x18, 0x98, 0x78, 0xf8, 0x38, 0xb8,
+ 0x48, 0xc8, 0x08, 0x88, 0x68, 0xe8, 0x28, 0xa8,
+ 0xd6, 0x16, 0x96, 0x76, 0xf6, 0x36, 0xb6, 0x46,
+ 0xc6, 0x06, 0x86, 0x66, 0xe6, 0x26, 0xa6, 0xde,
+ 0x9e, 0x7e, 0xfe, 0x3e, 0xbe, 0x4e, 0xce, 0x0e,
+ 0x8e, 0x6e, 0xee, 0x2e, 0x52, 0x12, 0x72, 0x32,
+ 0xb2, 0x42, 0xc2, 0x02, 0x82, 0x62, 0xe2, 0x22,
+ 0xa2, 0x5a, 0xda, 0x1a, 0x9a, 0x7a, 0xfa, 0x3a,
+ 0xba, 0xba, 0x4a, 0x4a, 0xca, 0xca, 0x0a, 0x0a,
+ 0x8a, 0x8a, 0x6a, 0x6a, 0xea, 0xea, 0x2a, 0x2a
};
#define NCOEFF 16 /* number of frequencies to be analyzed */
@@ -206,68 +216,72 @@
#define HIGRP 1
typedef struct {
- int grp; /* low/high group */
- int k; /* k */
- int k2; /* k fuer 2. harmonic */
+ int grp; /* low/high group */
+ int k; /* k */
+ int k2; /* k fuer 2. harmonic */
} dtmf_t;
/* For DTMF recognition:
* 2 * cos(2 * PI * k / N) precalculated for all k
*/
-static int cos2pik[NCOEFF] = {
- 55812, 29528, 53603, 24032, 51193, 14443, 48590, 6517,
- 38113, -21204, 33057, -32186, 25889, -45081, 18332, -55279
+static int cos2pik[NCOEFF] =
+{
+ 55812, 29528, 53603, 24032, 51193, 14443, 48590, 6517,
+ 38113, -21204, 33057, -32186, 25889, -45081, 18332, -55279
};
-static dtmf_t dtmf_tones[8] = {
- { LOGRP, 0, 1 }, /* 697 Hz */
- { LOGRP, 2, 3 }, /* 770 Hz */
- { LOGRP, 4, 5 }, /* 852 Hz */
- { LOGRP, 6, 7 }, /* 941 Hz */
- { HIGRP, 8, 9 }, /* 1209 Hz */
- { HIGRP, 10, 11 }, /* 1336 Hz */
- { HIGRP, 12, 13 }, /* 1477 Hz */
- { HIGRP, 14, 15 } /* 1633 Hz */
+static dtmf_t dtmf_tones[8] =
+{
+ {LOGRP, 0, 1}, /* 697 Hz */
+ {LOGRP, 2, 3}, /* 770 Hz */
+ {LOGRP, 4, 5}, /* 852 Hz */
+ {LOGRP, 6, 7}, /* 941 Hz */
+ {HIGRP, 8, 9}, /* 1209 Hz */
+ {HIGRP, 10, 11}, /* 1336 Hz */
+ {HIGRP, 12, 13}, /* 1477 Hz */
+ {HIGRP, 14, 15} /* 1633 Hz */
};
-static char dtmf_matrix[4][4] = {
- {'1', '2', '3', 'A'},
- {'4', '5', '6', 'B'},
- {'7', '8', '9', 'C'},
- {'*', '0', '#', 'D'}
+static char dtmf_matrix[4][4] =
+{
+ {'1', '2', '3', 'A'},
+ {'4', '5', '6', 'B'},
+ {'7', '8', '9', 'C'},
+ {'*', '0', '#', 'D'}
};
#if ((CPU == 386) || (CPU == 486) || (CPU == 586))
static inline void
isdn_audio_tlookup(const void *table, void *buff, unsigned long n)
{
- __asm__("cld\n"
- "1:\tlodsb\n\t"
- "xlatb\n\t"
- "stosb\n\t"
- "loop 1b\n\t"
- ::"b" ((long)table), "c" (n), "D" ((long)buff), "S" ((long)buff)
- :"bx","cx","di","si","ax");
+ __asm__("cld\n"
+ "1:\tlodsb\n\t"
+ "xlatb\n\t"
+ "stosb\n\t"
+ "loop 1b\n\t"
+ : : "b"((long) table), "c"(n), "D"((long) buff), "S"((long) buff)
+ : "bx", "cx", "di", "si", "ax");
}
+
#else
static inline void
isdn_audio_tlookup(const char *table, char *buff, unsigned long n)
{
- while (n--)
- *buff++ = table[*buff];
+ while (n--)
+ *buff++ = table[*buff];
}
#endif
void
isdn_audio_ulaw2alaw(unsigned char *buff, unsigned long len)
{
- isdn_audio_tlookup(isdn_audio_ulaw_to_alaw, buff, len);
+ isdn_audio_tlookup(isdn_audio_ulaw_to_alaw, buff, len);
}
void
isdn_audio_alaw2ulaw(unsigned char *buff, unsigned long len)
{
- isdn_audio_tlookup(isdn_audio_alaw_to_ulaw, buff, len);
+ isdn_audio_tlookup(isdn_audio_alaw_to_ulaw, buff, len);
}
/*
@@ -278,207 +292,218 @@
*/
-#define ZEROTRAP /* turn on the trap as per the MIL-STD */
+#define ZEROTRAP /* turn on the trap as per the MIL-STD */
#undef ZEROTRAP
-#define BIAS 0x84 /* define the add-in bias for 16 bit samples */
+#define BIAS 0x84 /* define the add-in bias for 16 bit samples */
#define CLIP 32635
static unsigned char
-isdn_audio_linear2ulaw(int sample) {
- static int exp_lut[256] = {
- 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,
- 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
- };
- int sign, exponent, mantissa;
- unsigned char ulawbyte;
-
- /* Get the sample into sign-magnitude. */
- sign = (sample >> 8) & 0x80; /* set aside the sign */
- if(sign != 0) sample = -sample; /* get magnitude */
- if(sample > CLIP) sample = CLIP; /* clip the magnitude */
-
- /* Convert from 16 bit linear to ulaw. */
- sample = sample + BIAS;
- exponent = exp_lut[( sample >> 7 ) & 0xFF];
- mantissa = (sample >> (exponent + 3)) & 0x0F;
- ulawbyte = ~(sign | (exponent << 4) | mantissa);
+isdn_audio_linear2ulaw(int sample)
+{
+ static int exp_lut[256] =
+ {
+ 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ };
+ int sign,
+ exponent,
+ mantissa;
+ unsigned char ulawbyte;
+
+ /* Get the sample into sign-magnitude. */
+ sign = (sample >> 8) & 0x80; /* set aside the sign */
+ if (sign != 0)
+ sample = -sample; /* get magnitude */
+ if (sample > CLIP)
+ sample = CLIP; /* clip the magnitude */
+
+ /* Convert from 16 bit linear to ulaw. */
+ sample = sample + BIAS;
+ exponent = exp_lut[(sample >> 7) & 0xFF];
+ mantissa = (sample >> (exponent + 3)) & 0x0F;
+ ulawbyte = ~(sign | (exponent << 4) | mantissa);
#ifdef ZEROTRAP
- /* optional CCITT trap */
- if (ulawbyte == 0) ulawbyte = 0x02;
+ /* optional CCITT trap */
+ if (ulawbyte == 0)
+ ulawbyte = 0x02;
#endif
- return(ulawbyte);
+ return (ulawbyte);
}
-static int Mx[3][8] = {
- { 0x3800, 0x5600, 0,0,0,0,0,0 },
- { 0x399a, 0x3a9f, 0x4d14, 0x6607, 0,0,0,0 },
- { 0x3556, 0x3556, 0x399A, 0x3A9F, 0x4200, 0x4D14, 0x6607, 0x6607 },
+static int Mx[3][8] =
+{
+ {0x3800, 0x5600, 0, 0, 0, 0, 0, 0},
+ {0x399a, 0x3a9f, 0x4d14, 0x6607, 0, 0, 0, 0},
+ {0x3556, 0x3556, 0x399A, 0x3A9F, 0x4200, 0x4D14, 0x6607, 0x6607},
};
-static int bitmask[9] = {
- 0, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff
-};
+static int bitmask[9] =
+{
+ 0, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff
+};
static int
-isdn_audio_get_bits (adpcm_state *s, unsigned char **in, int *len)
+isdn_audio_get_bits(adpcm_state * s, unsigned char **in, int *len)
{
- while( s->nleft < s->nbits) {
- int d = *((*in)++);
- (*len)--;
- s->word = (s->word << 8) | d;
- s->nleft += 8;
- }
- s->nleft -= s->nbits;
- return (s->word >> s->nleft) & bitmask[s->nbits];
+ while (s->nleft < s->nbits) {
+ int d = *((*in)++);
+ (*len)--;
+ s->word = (s->word << 8) | d;
+ s->nleft += 8;
+ }
+ s->nleft -= s->nbits;
+ return (s->word >> s->nleft) & bitmask[s->nbits];
}
static void
-isdn_audio_put_bits (int data, int nbits, adpcm_state *s,
- unsigned char **out, int *len)
+isdn_audio_put_bits(int data, int nbits, adpcm_state * s,
+ unsigned char **out, int *len)
{
- s->word = (s->word << nbits) | (data & bitmask[nbits]);
- s->nleft += nbits;
- while(s->nleft >= 8) {
- int d = (s->word >> (s->nleft-8));
- *(out[0]++) = d & 255;
- (*len)++;
- s->nleft -= 8;
- }
+ s->word = (s->word << nbits) | (data & bitmask[nbits]);
+ s->nleft += nbits;
+ while (s->nleft >= 8) {
+ int d = (s->word >> (s->nleft - 8));
+ *(out[0]++) = d & 255;
+ (*len)++;
+ s->nleft -= 8;
+ }
}
adpcm_state *
-isdn_audio_adpcm_init(adpcm_state *s, int nbits)
+isdn_audio_adpcm_init(adpcm_state * s, int nbits)
{
- if (!s)
- s = (adpcm_state *) kmalloc(sizeof(adpcm_state), GFP_ATOMIC);
- if (s) {
- s->a = 0;
- s->d = 5;
- s->word = 0;
- s->nleft = 0;
- s->nbits = nbits;
- }
- return s;
+ if (!s)
+ s = (adpcm_state *) kmalloc(sizeof(adpcm_state), GFP_ATOMIC);
+ if (s) {
+ s->a = 0;
+ s->d = 5;
+ s->word = 0;
+ s->nleft = 0;
+ s->nbits = nbits;
+ }
+ return s;
}
dtmf_state *
-isdn_audio_dtmf_init(dtmf_state *s)
+isdn_audio_dtmf_init(dtmf_state * s)
{
- if (!s)
- s = (dtmf_state *) kmalloc(sizeof(dtmf_state), GFP_ATOMIC);
- if (s) {
- s->idx = 0;
- s->last = ' ';
- }
- return s;
+ if (!s)
+ s = (dtmf_state *) kmalloc(sizeof(dtmf_state), GFP_ATOMIC);
+ if (s) {
+ s->idx = 0;
+ s->last = ' ';
+ }
+ return s;
}
/*
* Decompression of adpcm data to a/u-law
*
*/
-
+
int
-isdn_audio_adpcm2xlaw (adpcm_state *s, int fmt, unsigned char *in,
- unsigned char *out, int len)
+isdn_audio_adpcm2xlaw(adpcm_state * s, int fmt, unsigned char *in,
+ unsigned char *out, int len)
{
- int a = s->a;
- int d = s->d;
- int nbits = s->nbits;
- int olen = 0;
-
- while (len) {
- int e = isdn_audio_get_bits(s, &in, &len);
- int sign;
-
- if (nbits == 4 && e == 0)
- d = 4;
- sign = (e >> (nbits-1))?-1:1;
- e &= bitmask[nbits-1];
- a += sign * ((e << 1) + 1) * d >> 1;
- if (d & 1)
- a++;
- if (fmt)
- *out++ = isdn_audio_ulaw_to_alaw[
- isdn_audio_linear2ulaw(a << 2)];
- else
- *out++ = isdn_audio_linear2ulaw(a << 2);
- olen++;
- d = (d * Mx[nbits-2][ e ] + 0x2000) >> 14;
- if ( d < 5 )
- d = 5;
- }
- s->a = a;
- s->d = d;
- return olen;
+ int a = s->a;
+ int d = s->d;
+ int nbits = s->nbits;
+ int olen = 0;
+
+ while (len) {
+ int e = isdn_audio_get_bits(s, &in, &len);
+ int sign;
+
+ if (nbits == 4 && e == 0)
+ d = 4;
+ sign = (e >> (nbits - 1)) ? -1 : 1;
+ e &= bitmask[nbits - 1];
+ a += sign * ((e << 1) + 1) * d >> 1;
+ if (d & 1)
+ a++;
+ if (fmt)
+ *out++ = isdn_audio_ulaw_to_alaw[
+ isdn_audio_linear2ulaw(a << 2)];
+ else
+ *out++ = isdn_audio_linear2ulaw(a << 2);
+ olen++;
+ d = (d * Mx[nbits - 2][e] + 0x2000) >> 14;
+ if (d < 5)
+ d = 5;
+ }
+ s->a = a;
+ s->d = d;
+ return olen;
}
int
-isdn_audio_2adpcm_flush (adpcm_state *s, unsigned char *out)
+isdn_audio_2adpcm_flush(adpcm_state * s, unsigned char *out)
{
int olen = 0;
- if (s->nleft)
- isdn_audio_put_bits(0, 8-s->nleft, s, &out, &olen);
- return olen;
+ if (s->nleft)
+ isdn_audio_put_bits(0, 8 - s->nleft, s, &out, &olen);
+ return olen;
}
int
-isdn_audio_xlaw2adpcm (adpcm_state *s, int fmt, unsigned char *in,
- unsigned char *out, int len)
+isdn_audio_xlaw2adpcm(adpcm_state * s, int fmt, unsigned char *in,
+ unsigned char *out, int len)
{
- int a = s->a;
- int d = s->d;
- int nbits = s->nbits;
- int olen = 0;
-
- while (len--) {
- int e = 0, nmax = 1 << (nbits - 1);
- int sign, delta;
-
- if (fmt)
- delta = (isdn_audio_alaw_to_s16[*in++] >> 2) - a;
- else
- delta = (isdn_audio_ulaw_to_s16[*in++] >> 2) - a;
- if (delta < 0) {
- e = nmax;
- delta = -delta;
- }
- while( --nmax && delta > d ) {
- delta -= d;
- e++;
- }
- if (nbits == 4 && ((e & 0x0f) == 0))
- e = 8;
- isdn_audio_put_bits(e, nbits, s, &out, &olen);
- sign = (e >> (nbits-1))?-1:1 ;
- e &= bitmask[nbits-1];
-
- a += sign * ((e << 1) + 1) * d >> 1;
- if (d & 1)
- a++;
- d = (d * Mx[nbits-2][ e ] + 0x2000) >> 14;
- if (d < 5)
- d=5;
- }
+ int a = s->a;
+ int d = s->d;
+ int nbits = s->nbits;
+ int olen = 0;
+
+ while (len--) {
+ int e = 0,
+ nmax = 1 << (nbits - 1);
+ int sign,
+ delta;
+
+ if (fmt)
+ delta = (isdn_audio_alaw_to_s16[*in++] >> 2) - a;
+ else
+ delta = (isdn_audio_ulaw_to_s16[*in++] >> 2) - a;
+ if (delta < 0) {
+ e = nmax;
+ delta = -delta;
+ }
+ while (--nmax && delta > d) {
+ delta -= d;
+ e++;
+ }
+ if (nbits == 4 && ((e & 0x0f) == 0))
+ e = 8;
+ isdn_audio_put_bits(e, nbits, s, &out, &olen);
+ sign = (e >> (nbits - 1)) ? -1 : 1;
+ e &= bitmask[nbits - 1];
+
+ a += sign * ((e << 1) + 1) * d >> 1;
+ if (d & 1)
+ a++;
+ d = (d * Mx[nbits - 2][e] + 0x2000) >> 14;
+ if (d < 5)
+ d = 5;
+ }
s->a = a;
s->d = d;
- return olen;
+ return olen;
}
/*
@@ -488,99 +513,109 @@
* Result is stored into an sk_buff and queued up for later
* evaluation.
*/
-void
-isdn_audio_goertzel(int *sample, modem_info *info) {
- int sk, sk1, sk2;
- int k, n;
- struct sk_buff *skb;
- int *result;
-
- skb = dev_alloc_skb(sizeof(int) * NCOEFF);
- if (!skb) {
- printk(KERN_WARNING
- "isdn_audio: Could not alloc DTMF result for ttyI%d\n",
- info->line);
- return;
- }
- result = (int *)skb_put(skb, sizeof(int) * NCOEFF);
- skb->free = 1;
- skb->users = 0;
- for (k = 0; k < NCOEFF; k++) {
- sk = sk1 = sk2 = 0;
- for (n = 0; n < DTMF_NPOINTS; n++) {
- sk = sample[n] + ((cos2pik[k] * sk1) >> 15) - sk2;
- sk2 = sk1;
- sk1 = sk;
- }
- result[k] =
- ((sk * sk) >> AMP_BITS) -
- ((((cos2pik[k] * sk) >> 15) * sk2) >> AMP_BITS) +
- ((sk2 * sk2) >> AMP_BITS);
- }
- skb_queue_tail(&info->dtmf_queue, skb);
- isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
+static void
+isdn_audio_goertzel(int *sample, modem_info * info)
+{
+ int sk,
+ sk1,
+ sk2;
+ int k,
+ n;
+ struct sk_buff *skb;
+ int *result;
+
+ skb = dev_alloc_skb(sizeof(int) * NCOEFF);
+ if (!skb) {
+ printk(KERN_WARNING
+ "isdn_audio: Could not alloc DTMF result for ttyI%d\n",
+ info->line);
+ return;
+ }
+ SET_SKB_FREE(skb);
+ result = (int *) skb_put(skb, sizeof(int) * NCOEFF);
+ for (k = 0; k < NCOEFF; k++) {
+ sk = sk1 = sk2 = 0;
+ for (n = 0; n < DTMF_NPOINTS; n++) {
+ sk = sample[n] + ((cos2pik[k] * sk1) >> 15) - sk2;
+ sk2 = sk1;
+ sk1 = sk;
+ }
+ result[k] =
+ ((sk * sk) >> AMP_BITS) -
+ ((((cos2pik[k] * sk) >> 15) * sk2) >> AMP_BITS) +
+ ((sk2 * sk2) >> AMP_BITS);
+ }
+ skb_queue_tail(&info->dtmf_queue, skb);
+ isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
}
void
-isdn_audio_eval_dtmf(modem_info *info)
+isdn_audio_eval_dtmf(modem_info * info)
{
- struct sk_buff *skb;
- int *result;
- dtmf_state *s;
- int silence;
- int i;
- int di;
- int ch;
- unsigned long flags;
- int grp[2];
- char what;
- char *p;
-
- while ((skb = skb_dequeue(&info->dtmf_queue))) {
- result = (int *)skb->data;
- s = info->dtmf_state;
- grp[LOGRP] = grp[HIGRP] = -2;
- silence = 0;
- for(i = 0; i < 8; i++) {
- if ((result[dtmf_tones[i].k] > DTMF_TRESH) &&
- (result[dtmf_tones[i].k2] < H2_TRESH) )
- grp[dtmf_tones[i].grp] = (grp[dtmf_tones[i].grp] == -2)?i:-1;
- else
- if ((result[dtmf_tones[i].k] < SILENCE_TRESH) &&
- (result[dtmf_tones[i].k2] < SILENCE_TRESH) )
- silence++;
- }
- if(silence == 8)
- what = ' ';
- else {
- if((grp[LOGRP] >= 0) && (grp[HIGRP] >= 0)) {
- what = dtmf_matrix[grp[LOGRP]][grp[HIGRP] - 4];
- if(s->last != ' ' && s->last != '.')
- s->last = what; /* min. 1 non-DTMF between DTMF */
- } else
- what = '.';
- }
- if ((what != s->last) && (what != ' ') && (what != '.')) {
- printk(KERN_DEBUG "dtmf: tt='%c'\n", what);
- p = skb->data;
- *p++ = 0x10;
- *p = what;
- skb_trim(skb, 2);
- save_flags(flags);
- cli();
- di = info->isdn_driver;
- ch = info->isdn_channel;
- __skb_queue_tail(&dev->drv[di]->rpqueue[ch], skb);
- dev->drv[di]->rcvcount[ch] += 2;
- restore_flags(flags);
- /* Schedule dequeuing */
- if ((dev->modempoll) && (info->rcvsched))
- isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
- wake_up_interruptible(&dev->drv[di]->rcv_waitq[ch]);
- } else
- kfree_skb(skb, FREE_READ);
- s->last = what;
- }
+ struct sk_buff *skb;
+ int *result;
+ dtmf_state *s;
+ int silence;
+ int i;
+ int di;
+ int ch;
+ unsigned long flags;
+ int grp[2];
+ char what;
+ char *p;
+
+ while ((skb = skb_dequeue(&info->dtmf_queue))) {
+ result = (int *) skb->data;
+ s = info->dtmf_state;
+ grp[LOGRP] = grp[HIGRP] = -2;
+ silence = 0;
+ for (i = 0; i < 8; i++) {
+ if ((result[dtmf_tones[i].k] > DTMF_TRESH) &&
+ (result[dtmf_tones[i].k2] < H2_TRESH))
+ grp[dtmf_tones[i].grp] = (grp[dtmf_tones[i].grp] == -2) ? i : -1;
+ else if ((result[dtmf_tones[i].k] < SILENCE_TRESH) &&
+ (result[dtmf_tones[i].k2] < SILENCE_TRESH))
+ silence++;
+ }
+ if (silence == 8)
+ what = ' ';
+ else {
+ if ((grp[LOGRP] >= 0) && (grp[HIGRP] >= 0)) {
+ what = dtmf_matrix[grp[LOGRP]][grp[HIGRP] - 4];
+ if (s->last != ' ' && s->last != '.')
+ s->last = what; /* min. 1 non-DTMF between DTMF */
+ } else
+ what = '.';
+ }
+ if ((what != s->last) && (what != ' ') && (what != '.')) {
+ printk(KERN_DEBUG "dtmf: tt='%c'\n", what);
+ p = skb->data;
+ *p++ = 0x10;
+ *p = what;
+ skb_trim(skb, 2);
+ if (skb_headroom(skb) < sizeof(isdn_audio_skb)) {
+ printk(KERN_WARNING
+ "isdn_audio: insufficient skb_headroom, dropping\n");
+ kfree_skb(skb, FREE_READ);
+ return;
+ }
+ ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
+ ISDN_AUDIO_SKB_LOCK(skb) = 0;
+ save_flags(flags);
+ cli();
+ di = info->isdn_driver;
+ ch = info->isdn_channel;
+ __skb_queue_tail(&dev->drv[di]->rpqueue[ch], skb);
+ dev->drv[di]->rcvcount[ch] += 2;
+ restore_flags(flags);
+ /* Schedule dequeuing */
+ if ((dev->modempoll) && (info->rcvsched))
+ isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
+ wake_up_interruptible(&dev->drv[di]->rcv_waitq[ch]);
+ } else
+ kfree_skb(skb, FREE_READ);
+ s->last = what;
+ }
}
/*
@@ -593,30 +628,28 @@
* fmt = audio data format (0 = ulaw, 1 = alaw)
*/
void
-isdn_audio_calc_dtmf(modem_info *info, unsigned char *buf, int len, int fmt)
+isdn_audio_calc_dtmf(modem_info * info, unsigned char *buf, int len, int fmt)
{
- dtmf_state *s = info->dtmf_state;
- int i;
- int c;
-
- while (len) {
- c = MIN(len, (DTMF_NPOINTS - s->idx));
- if (c <= 0)
- break;
- for (i = 0; i < c; i++) {
- if (fmt)
- s->buf[s->idx++] =
- isdn_audio_alaw_to_s16[*buf++] >> (15 - AMP_BITS);
- else
- s->buf[s->idx++] =
- isdn_audio_ulaw_to_s16[*buf++] >> (15 - AMP_BITS);
- }
- if (s->idx == DTMF_NPOINTS) {
- isdn_audio_goertzel(s->buf, info);
- s->idx = 0;
- }
- len -= c;
- }
+ dtmf_state *s = info->dtmf_state;
+ int i;
+ int c;
+
+ while (len) {
+ c = MIN(len, (DTMF_NPOINTS - s->idx));
+ if (c <= 0)
+ break;
+ for (i = 0; i < c; i++) {
+ if (fmt)
+ s->buf[s->idx++] =
+ isdn_audio_alaw_to_s16[*buf++] >> (15 - AMP_BITS);
+ else
+ s->buf[s->idx++] =
+ isdn_audio_ulaw_to_s16[*buf++] >> (15 - AMP_BITS);
+ }
+ if (s->idx == DTMF_NPOINTS) {
+ isdn_audio_goertzel(s->buf, info);
+ s->idx = 0;
+ }
+ len -= c;
+ }
}
-
-
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TCL-scripts by Sam Shen, slshen@lbl.gov