diff options
Diffstat (limited to 'usr.sbin/i4b')
| -rw-r--r-- | usr.sbin/i4b/dtmfdecode/Makefile | 15 | ||||
| -rw-r--r-- | usr.sbin/i4b/dtmfdecode/dtmfdecode.1 | 64 | ||||
| -rw-r--r-- | usr.sbin/i4b/dtmfdecode/dtmfdecode.c | 150 | ||||
| -rw-r--r-- | usr.sbin/i4b/g711conv/Makefile | 14 | ||||
| -rw-r--r-- | usr.sbin/i4b/g711conv/g711conv.1 | 96 | ||||
| -rw-r--r-- | usr.sbin/i4b/g711conv/g711conv.c | 304 |
6 files changed, 0 insertions, 643 deletions
diff --git a/usr.sbin/i4b/dtmfdecode/Makefile b/usr.sbin/i4b/dtmfdecode/Makefile deleted file mode 100644 index 792b2ef39301..000000000000 --- a/usr.sbin/i4b/dtmfdecode/Makefile +++ /dev/null @@ -1,15 +0,0 @@ -#--------------------------------------------------------------------------- -# -# $FreeBSD$ -# -# last edit-date: [Thu May 20 12:04:05 1999] -# -#--------------------------------------------------------------------------- - -PROG = dtmfdecode -SRC = dtmfdecode.c -#LDADD += -lm -CFLAGS += -Wall -g -DDEBUG -MAN1 = dtmfdecode.1 - -.include <bsd.prog.mk> diff --git a/usr.sbin/i4b/dtmfdecode/dtmfdecode.1 b/usr.sbin/i4b/dtmfdecode/dtmfdecode.1 deleted file mode 100644 index 42cd5beb7419..000000000000 --- a/usr.sbin/i4b/dtmfdecode/dtmfdecode.1 +++ /dev/null @@ -1,64 +0,0 @@ -.\" -.\" Copyright (c) 1999 Hellmuth Michaelis. All rights reserved. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" $FreeBSD$ -.\" -.\" last edit-date: [Mon Apr 26 13:42:15 1999] -.\" -.\" -.Dd February, 15 1999 -.Dt DTMFDECODE 1 -.Os -.Sh NAME -.Nm dtmfdecode -.Nd decodes DTMF tones from A-law audio data -.Sh SYNOPSIS -.Nm -.Sh DESCRIPTION -.Nm dtmfdecode -is part of the isdn4bsd package and is used to detect DTMF tones in the -audio stream. -.Pp -It reads audio G.711 A-Law coded data from stdin and outputs the detected -numbers values as ASCII charcters to stdout. -.Pp -The detector is implemented as 8 narrow band-pass filters realized with -an integer double-cross recursive algorithm. Various ad-hoc methods are -employed to provide hysteresis and anti-bounce for the detected signals. -.Sh EXAMPLES -The command: -.Bd -literal -offset indent -dtmfdecode < beep.al -.Ed -.Pp -will print a "1" to stdout. -.Sh STANDARDS -ITU Recommendations G.711 -.Sh AUTHORS -The -.Nm -utility was written by -.An Poul-Henning Kamp Aq phk@FreeBSD.org . -This man page was written by -.An Hellmuth Michaelis Aq hm@FreeBSD.org . diff --git a/usr.sbin/i4b/dtmfdecode/dtmfdecode.c b/usr.sbin/i4b/dtmfdecode/dtmfdecode.c deleted file mode 100644 index f96bacd42b10..000000000000 --- a/usr.sbin/i4b/dtmfdecode/dtmfdecode.c +++ /dev/null @@ -1,150 +0,0 @@ -/* - * ---------------------------------------------------------------------------- - * "THE BEER-WARE LICENSE" (Revision 42): - * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you - * can do whatever you want with this stuff. If we meet some day, and you think - * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp - * ---------------------------------------------------------------------------- - * - * $FreeBSD$ - * - * Extract DTMF signalling from ISDN4BSD A-law coded audio data - * - * A-Law to linear conversion from the sox package. - * - */ - -#include <stdio.h> -#include <math.h> - -/* Integer math scaling factor */ -#define FSC (1<<12) - -/* Alaw parameters */ -#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */ -#define QUANT_MASK (0xf) /* Quantization field mask. */ -#define SEG_SHIFT (4) /* Left shift for segment number. */ -#define SEG_MASK (0x70) /* Segment field mask. */ - -static int -alaw2linear(a_val) - unsigned char a_val; -{ - int t; - int seg; - - a_val ^= 0x55; - - t = (a_val & QUANT_MASK) << 4; - seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT; - switch (seg) { - case 0: - t += 8; - break; - case 1: - t += 0x108; - break; - default: - t += 0x108; - t <<= seg - 1; - } - return ((a_val & SIGN_BIT) ? t : -t); -} - -#ifdef USE_COS -/* The frequencies we're trying to detect */ -static int dtmf[8] = {697, 770, 852, 941, 1209, 1336, 1477, 1633}; -#else -/* precalculated: p1[kk] = (-cos(2 * 3.141592 * dtmf[kk] / 8000.0) * FSC) */ -static int p1[8] = {-3497, -3369, -3212, -3027, -2384, -2040, -1635, -1164}; -#endif - -/* This is the Q of the filter (pole radius) */ -#define POLRAD .99 - -#define P2 ((int)(POLRAD*POLRAD*FSC)) - -int -main(int argc, char **argv) -{ - int i, kk, t, nn, s, so, ia; - int x, c, d, f, h[8], k[8], n, y[8]; -#ifdef USE_COS - int p1[8]; -#endif - int alaw[256]; - char key[256]; - - for (kk = 0; kk < 8; kk++) { - y[kk] = h[kk] = k[kk] = 0; -#ifdef USE_COS - p1[kk] = (-cos(2 * 3.141592 * dtmf[kk] / 8000.0) * FSC); -#endif - } - - for (i = 0; i < 256; i++) { - key[i] = '?'; - alaw[i] = alaw2linear(i) / (32768/FSC); - } - - /* We encode the tones in 8 bits, translate those to symbol */ - key[0x00] = '\0'; - - key[0x11] = '1'; key[0x12] = '4'; key[0x14] = '7'; key[0x18] = '*'; - key[0x21] = '2'; key[0x22] = '5'; key[0x24] = '8'; key[0x28] = '0'; - key[0x41] = '3'; key[0x42] = '6'; key[0x44] = '9'; key[0x48] = '#'; - key[0x81] = 'A'; key[0x82] = 'B'; key[0x84] = 'C'; key[0x88] = 'D'; - - nn = 0; - ia = 0; - so = 0; - t = 0; - while ((i = getchar()) != EOF) - { - t++; - - /* Convert to our format */ - x = alaw[i]; - - /* Input amplitude */ - if (x > 0) - ia += (x - ia) / 128; - else - ia += (-x - ia) / 128; - - /* For each tone */ - s = 0; - for(kk = 0; kk < 8; kk++) { - - /* Turn the crank */ - c = (P2 * (x - k[kk])) / FSC; - d = x + c; - f = (p1[kk] * (d - h[kk])) / FSC; - n = x - k[kk] - c; - k[kk] = h[kk] + f; - h[kk] = f + d; - - /* Detect and Average */ - if (n > 0) - y[kk] += (n - y[kk]) / 64; - else - y[kk] += (-n - y[kk]) / 64; - - /* Threshold */ - if (y[kk] > FSC/10 && y[kk] > ia) - s |= 1 << kk; - } - - /* Hysteresis and noise supressor */ - if (s != so) { -/* printf("x %d %x -> %x\n",t,so, s); */ - nn = 0; - so = s; - } else if (nn++ == 520 && key[s]) { - putchar(key[s]); -/* printf(" %d %x\n",t,s); */ - } - } - putchar('\n'); - return (0); -} diff --git a/usr.sbin/i4b/g711conv/Makefile b/usr.sbin/i4b/g711conv/Makefile deleted file mode 100644 index f96de268deea..000000000000 --- a/usr.sbin/i4b/g711conv/Makefile +++ /dev/null @@ -1,14 +0,0 @@ -#--------------------------------------------------------------------------- -# -# $FreeBSD$ -# -# last edit-date: [Thu May 20 11:58:43 1999] -# -#--------------------------------------------------------------------------- - -PROG = g711conv -SRC = g711conv.c -CFLAGS += -Wall -g -MAN1 = g711conv.1 - -.include <bsd.prog.mk> diff --git a/usr.sbin/i4b/g711conv/g711conv.1 b/usr.sbin/i4b/g711conv/g711conv.1 deleted file mode 100644 index 4d9102458cad..000000000000 --- a/usr.sbin/i4b/g711conv/g711conv.1 +++ /dev/null @@ -1,96 +0,0 @@ -.\" -.\" Copyright (c) 1999 Hellmuth Michaelis. All rights reserved. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" $FreeBSD$ -.\" -.\" last edit-date: [Mon Mar 15 16:17:23 1999] -.\" -.Dd March 15, 1999 -.Dt G711CONV 1 -.Os -.Sh NAME -.Nm g711conv -.Nd conversions according to G.711 -.Sh SYNOPSIS -.Nm -.Op Fl a -.Op Fl u -.Op Fl P -.Op Fl A -.Op Fl R -.Sh DESCRIPTION -.Nm g711conv -is part of the isdn4bsd package and is used to convert between the A-Law and -u-law formats as specified in ITU G.711. It is based on a freely available -and freely usable reference implementation done by Sun Microsystems, Inc. -.Pp -The following options are available: -.Bl -tag -width Ds -.It Fl a -Convert A-law to u-law -.It Fl u -Convert u-law to A-law -.It Fl r -Reverse bits before conversion -.It Fl R -Reverse bits after conversion -.It Fl P -Print the resulting conversion tables (as C-source) to stdout instead of -doing the actual conversion. -.El -.Pp - -.Sh STANDARDS -A-Law and u-Law conversions are specified in ITU Recommendation G.711. -.Pp -The reference implementation done by Sun Microsystems, Inc. is available -from http://www.itu.int/itudoc/itu-t/rec/g/g700-799/refimpl.txt -.Pp - -.Sh EXAMPLES -The command: -.Bd -literal -offset indent -g711conv -P -a -.Ed -.Pp -prints out the A-law to u-law conversion table as C-source to stdout. -.Pp -The command: -.Bd -literal -offset indent -cat max_headroom.ul | g711conv -u -R > /dev/i4btel0 -.Ed -.Pp -converts the u-law coded voice of Max Headroom to A-law, reverses the -bits of the result and moves that to an active isdn4bsd telephone connection. -.Pp - -.Sh AUTHORS -The -.Nm -utility and this manpage were written by -.An Hellmuth Michaelis Aq hm@kts.org -based on the G.711 conversion reference code written by Sun Microsystems, -Inc. and code contributed to isdn4bsd by -.An Stefan Bethke . - diff --git a/usr.sbin/i4b/g711conv/g711conv.c b/usr.sbin/i4b/g711conv/g711conv.c deleted file mode 100644 index f6a442ead0d3..000000000000 --- a/usr.sbin/i4b/g711conv/g711conv.c +++ /dev/null @@ -1,304 +0,0 @@ -/* - * Copyright (c) 1999 Hellmuth Michaelis. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * --- - * - * The A-law to u-law and u-law to A-law conversion routines and tables - * were taken from the G.711 reference implementation from Sun and freely - * available as http://www.itu.int/itudoc/itu-t/rec/g/g700-799/refimpl.txt. - * - * Therefore for that part of the code, the following restrictions apply: - * - * - * This source code is a product of Sun Microsystems, Inc. and is provided - * for unrestricted use. Users may copy or modify this source code without - * charge. - * - * SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING - * THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR - * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. - * - * Sun source code is provided with no support and without any obligation on - * the part of Sun Microsystems, Inc. to assist in its use, correction, - * modification or enhancement. - * - * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE - * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE - * OR ANY PART THEREOF. - * - * In no event will Sun Microsystems, Inc. be liable for any lost revenue - * or profits or other special, indirect and consequential damages, even if - * Sun has been advised of the possibility of such damages. - * - * Sun Microsystems, Inc. - * 2550 Garcia Avenue - * Mountain View, California 94043 - * - * --- - * - * The bitreverse table was contributed by Stefan Bethke. - * - *--------------------------------------------------------------------------- - * - * A-law / u-law conversions as specified in G.711 - * ----------------------------------------------- - * - * last edit-date: [Mon Apr 26 14:00:31 1999] - * - * $FreeBSD$ - * - *---------------------------------------------------------------------------*/ - -#include <stdio.h> -#include <unistd.h> -#include <machine/i4b_ioctl.h> - -/* copy from CCITT G.711 specifications */ - -/* u- to A-law conversions */ - -unsigned char _u2a[128] = { - 1, 1, 2, 2, 3, 3, 4, 4, - 5, 5, 6, 6, 7, 7, 8, 8, - 9, 10, 11, 12, 13, 14, 15, 16, - 17, 18, 19, 20, 21, 22, 23, 24, - 25, 27, 29, 31, 33, 34, 35, 36, - 37, 38, 39, 40, 41, 42, 43, 44, - 46, 48, 49, 50, 51, 52, 53, 54, - 55, 56, 57, 58, 59, 60, 61, 62, - 64, 65, 66, 67, 68, 69, 70, 71, - 72, 73, 74, 75, 76, 77, 78, 79, - 81, 82, 83, 84, 85, 86, 87, 88, - 89, 90, 91, 92, 93, 94, 95, 96, - 97, 98, 99, 100, 101, 102, 103, 104, - 105, 106, 107, 108, 109, 110, 111, 112, - 113, 114, 115, 116, 117, 118, 119, 120, - 121, 122, 123, 124, 125, 126, 127, 128 -}; - -/* A- to u-law conversions */ - -unsigned char _a2u[128] = { - 1, 3, 5, 7, 9, 11, 13, 15, - 16, 17, 18, 19, 20, 21, 22, 23, - 24, 25, 26, 27, 28, 29, 30, 31, - 32, 32, 33, 33, 34, 34, 35, 35, - 36, 37, 38, 39, 40, 41, 42, 43, - 44, 45, 46, 47, 48, 48, 49, 49, - 50, 51, 52, 53, 54, 55, 56, 57, - 58, 59, 60, 61, 62, 63, 64, 64, - 65, 66, 67, 68, 69, 70, 71, 72, - 73, 74, 75, 76, 77, 78, 79, 79, - 80, 81, 82, 83, 84, 85, 86, 87, - 88, 89, 90, 91, 92, 93, 94, 95, - 96, 97, 98, 99, 100, 101, 102, 103, - 104, 105, 106, 107, 108, 109, 110, 111, - 112, 113, 114, 115, 116, 117, 118, 119, - 120, 121, 122, 123, 124, 125, 126, 127 -}; - -/* reverse bits (7->0, 6->1, 5->2 etc) for tx to / rx from ISDN */ - -unsigned char bitreverse[256] = { - 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, - 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, - 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, - 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, - 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, - 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, - 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, - 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, - 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, - 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, - 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, - 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, - 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, - 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, - 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, - 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff -}; - -/* A-law to u-law conversion */ - -unsigned char alaw2ulaw(unsigned char aval) -{ - aval &= 0xff; - return ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) : - (0x7F ^ _a2u[aval ^ 0x55])); -} - -/* u-law to A-law conversion */ - -unsigned char ulaw2alaw(unsigned char uval) -{ - uval &= 0xff; - return ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) : - (0x55 ^ (_u2a[0x7F ^ uval] - 1))); -} - -void -usage(void) -{ - fprintf(stderr, "\n"); - fprintf(stderr, "g711conv - do conversions according to ITU G.711, (version %d.%d.%d)\n",VERSION, REL, STEP); - fprintf(stderr, "usage: g711conv -a -r -R -u -P\n"); - fprintf(stderr, " -a A-law to u-law conversion\n"); - fprintf(stderr, " -r reverse bits before conversion\n"); - fprintf(stderr, " -R reverse bits after conversion\n"); - fprintf(stderr, " -u u-law to A-law conversion\n"); - fprintf(stderr, " -P print conversion table as C source\n"); - fprintf(stderr, "\n"); - exit(1); -} - -int -main(int argc, char **argv) -{ - int i; - int c; - int opt_a = 0; - int opt_u = 0; - int opt_r = 0; - int opt_P = 0; - int opt_R = 0; - unsigned char uc; - - while ((c = getopt(argc, argv, "aurPR?")) != -1) - { - switch(c) - { - case 'a': - opt_a = 1; - break; - - case 'u': - opt_u = 1; - break; - - case 'r': - opt_r = 1; - break; - - case 'R': - opt_R = 1; - break; - - case 'P': - opt_P = 1; - break; - - case '?': - default: - usage(); - break; - } - } - - if((opt_a + opt_u) > 1) - usage(); - - if(opt_P) - { - printf("\n/* "); - - if((opt_a + opt_u) == 0) - printf("No Conversion"); - - if(opt_a) - printf("A-law to u-law conversion"); - - if(opt_u) - printf("u-law to A-law conversion"); - - if(opt_r) - printf(", reverse bits BEFORE conversion"); - - if(opt_R) - printf(", reverse bits AFTER conversion"); - - if(opt_a) - { - printf(" */\n\nunsigned char a2u_tab[256] = {"); - } - else if(opt_u) - { - printf(" */\n\nunsigned char u2a_tab[256] = {"); - } - else - { - printf(" */\n\nunsigned char table[256] = {"); - } - - for(i=0; i < 256; i++) - { - uc = i; - - if(!(i % 8)) - printf("\n/* %02x */\t", i); - - if(opt_r) - uc = bitreverse[uc]; - - if(opt_u) - uc = ulaw2alaw(uc); - - if(opt_a) - uc = alaw2ulaw(uc); - - if(opt_R) - uc = bitreverse[uc]; - - if(i == 255) - printf("0x%02x", uc); - else - printf("0x%02x, ", uc); - } - printf("\n};\n"); - } - else - { - unsigned char ib[1]; - - while(fread(ib, 1, 1, stdin) == 1) - { - if(opt_r) - ib[0] = bitreverse[ib[0]]; - - if(opt_u) - ib[0] = ulaw2alaw(ib[0]); - - if(opt_a) - ib[0] = alaw2ulaw(ib[0]); - - if(opt_R) - ib[0] = bitreverse[ib[0]]; - - fwrite(ib, 1, 1, stdout); - } - } - return(0); -} - -/* EOF */ |