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freeswitch/libs/libteletone/src/libteletone_generate.c
Michael Jerris 1005e93b63 LBTEL-1 Build error "array subscript is above array bounds" 
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10741 d0543943-73ff-0310-b7d9-9358b9ac24b2
2008-12-12 19:45:34 +00:00

501 lines
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/*
* libteletone
* Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is libteletone
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <anthmct@yahoo.com>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Anthony Minessale II <anthmct@yahoo.com>
*
*
* libteletone.c -- Tone Generator
*
*
*
* Exception:
* The author hereby grants the use of this source code under the
* following license if and only if the source code is distributed
* as part of the openzap library. Any use or distribution of this
* source code outside the scope of the openzap library will nullify the
* following license and reinact the MPL 1.1 as stated above.
*
* Copyright (c) 2007, Anthony Minessale II
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the original author; nor the names of any contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER
* 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.
*/
#include <libteletone.h>
#define SMAX 32767
#define SMIN -32768
#define normalize_to_16bit(n) if (n > SMAX) n = SMAX; else if (n < SMIN) n = SMIN;
#ifdef _MSC_VER
#pragma warning(disable:4706)
#endif
int16_t TELETONE_SINES[SINE_TABLE_MAX] = {
0x00c9, 0x025b, 0x03ed, 0x057f, 0x0711, 0x08a2, 0x0a33, 0x0bc4,
0x0d54, 0x0ee4, 0x1073, 0x1201, 0x138f, 0x151c, 0x16a8, 0x1833,
0x19be, 0x1b47, 0x1cd0, 0x1e57, 0x1fdd, 0x2162, 0x22e5, 0x2467,
0x25e8, 0x2768, 0x28e5, 0x2a62, 0x2bdc, 0x2d55, 0x2ecc, 0x3042,
0x31b5, 0x3327, 0x3497, 0x3604, 0x3770, 0x38d9, 0x3a40, 0x3ba5,
0x3d08, 0x3e68, 0x3fc6, 0x4121, 0x427a, 0x43d1, 0x4524, 0x4675,
0x47c4, 0x490f, 0x4a58, 0x4b9e, 0x4ce1, 0x4e21, 0x4f5e, 0x5098,
0x51cf, 0x5303, 0x5433, 0x5560, 0x568a, 0x57b1, 0x58d4, 0x59f4,
0x5b10, 0x5c29, 0x5d3e, 0x5e50, 0x5f5e, 0x6068, 0x616f, 0x6272,
0x6371, 0x646c, 0x6564, 0x6657, 0x6747, 0x6832, 0x691a, 0x69fd,
0x6add, 0x6bb8, 0x6c8f, 0x6d62, 0x6e31, 0x6efb, 0x6fc2, 0x7083,
0x7141, 0x71fa, 0x72af, 0x735f, 0x740b, 0x74b3, 0x7556, 0x75f4,
0x768e, 0x7723, 0x77b4, 0x7840, 0x78c8, 0x794a, 0x79c9, 0x7a42,
0x7ab7, 0x7b27, 0x7b92, 0x7bf9, 0x7c5a, 0x7cb7, 0x7d0f, 0x7d63,
0x7db1, 0x7dfb, 0x7e3f, 0x7e7f, 0x7eba, 0x7ef0, 0x7f22, 0x7f4e,
0x7f75, 0x7f98, 0x7fb5, 0x7fce, 0x7fe2, 0x7ff1, 0x7ffa, 0x7fff
};
int teletone_set_tone(teletone_generation_session_t *ts, int index, ...)
{
va_list ap;
int i = 0;
teletone_process_t x = 0;
va_start(ap, index);
while (i < TELETONE_MAX_TONES && (x = va_arg(ap, teletone_process_t))) {
ts->TONES[index].freqs[i++] = x;
}
va_end(ap);
return (i > TELETONE_MAX_TONES) ? -1 : 0;
}
int teletone_set_map(teletone_tone_map_t *map, ...)
{
va_list ap;
int i = 0;
teletone_process_t x = 0;
va_start(ap, map);
while (i < TELETONE_MAX_TONES && (x = va_arg(ap, teletone_process_t))) {
map->freqs[i++] = x;
}
va_end(ap);
return (i > TELETONE_MAX_TONES) ? -1 : 0;
}
int teletone_init_session(teletone_generation_session_t *ts, int buflen, tone_handler handler, void *user_data)
{
memset(ts, 0, sizeof(*ts));
ts->rate = 8000;
ts->channels = 1;
ts->duration = 2000;
ts->wait = 500;
ts->tmp_duration = -1;
ts->tmp_wait = -1;
ts->handler = handler;
ts->user_data = user_data;
ts->volume = -7;
ts->decay_step = 0;
ts->decay_factor = 1;
if (buflen) {
if ((ts->buffer = calloc(buflen, sizeof(teletone_audio_t))) == 0) {
return -1;
}
ts->datalen = buflen;
} else {
ts->dynamic = 1024;
}
/* Add Standard DTMF Tones */
teletone_set_tone(ts, '1', 697.0, 1209.0, 0.0);
teletone_set_tone(ts, '2', 697.0, 1336.0, 0.0);
teletone_set_tone(ts, '3', 697.0, 1477.0, 0.0);
teletone_set_tone(ts, 'A', 697.0, 1633.0, 0.0);
teletone_set_tone(ts, '4', 770.0, 1209.0, 0.0);
teletone_set_tone(ts, '5', 770.0, 1336.0, 0.0);
teletone_set_tone(ts, '6', 770.0, 1477.0, 0.0);
teletone_set_tone(ts, 'B', 770.0, 1633.0, 0.0);
teletone_set_tone(ts, '7', 859.0, 1209.0, 0.0);
teletone_set_tone(ts, '8', 859.0, 1336.0, 0.0);
teletone_set_tone(ts, '9', 859.0, 1477.0, 0.0);
teletone_set_tone(ts, 'C', 859.0, 1633.0, 0.0);
teletone_set_tone(ts, '*', 941.0, 1209.0, 0.0);
teletone_set_tone(ts, '0', 941.0, 1336.0, 0.0);
teletone_set_tone(ts, '#', 941.0, 1477.0, 0.0);
teletone_set_tone(ts, 'D', 941.0, 1633.0, 0.0);
return 0;
}
int teletone_destroy_session(teletone_generation_session_t *ts)
{
if (ts->buffer) {
free(ts->buffer);
ts->buffer = NULL;
ts->samples = 0;
}
return 0;
}
static int ensure_buffer(teletone_generation_session_t *ts, int need)
{
need += ts->samples;
need *= sizeof(teletone_audio_t);
need *= ts->channels;
if (need > ts->datalen) {
teletone_audio_t *tmp;
ts->datalen = need + ts->dynamic;
tmp = realloc(ts->buffer, ts->datalen);
if (!tmp) {
return -1;
}
ts->buffer = tmp;
}
return 0;
}
int teletone_mux_tones(teletone_generation_session_t *ts, teletone_tone_map_t *map)
{
/*teletone_process_t period = (1.0 / ts->rate) / ts->channels;*/
int i, c;
int freqlen = 0;
teletone_dds_state_t tones[TELETONE_MAX_TONES+1];
//int decay = 0;
int duration;
int wait = 0;
int32_t sample;
int32_t dc = 0;
float vol = ts->volume;
ts->samples = 0;
memset(tones, 0, sizeof(tones[0]) * TELETONE_MAX_TONES);
duration = (ts->tmp_duration > -1) ? ts->tmp_duration : ts->duration;
wait = (ts->tmp_wait > -1) ? ts->tmp_wait : ts->wait;
if (map->freqs[0] > 0) {
for (freqlen = 0; freqlen < TELETONE_MAX_TONES && map->freqs[freqlen]; freqlen++) {
teletone_dds_state_set_tone(&tones[freqlen], map->freqs[freqlen], ts->rate, 0);
teletone_dds_state_set_tx_level(&tones[freqlen], vol);
}
if (ts->channels > 1) {
duration *= ts->channels;
}
if (ts->dynamic) {
if (ensure_buffer(ts, duration)) {
return -1;
}
}
for (ts->samples = 0; ts->samples < ts->datalen && ts->samples < duration; ts->samples++) {
if (ts->decay_direction && ++dc >= ts->decay_step) {
float nvol = vol + ts->decay_direction * ts->decay_factor;
int j;
if (nvol <= TELETONE_VOL_DB_MAX && nvol >= TELETONE_VOL_DB_MIN) {
vol = nvol;
for (j = 0; j < TELETONE_MAX_TONES && map->freqs[j]; j++) {
teletone_dds_state_set_tx_level(&tones[j], vol);
}
dc = 0;
}
}
sample = 128;
for (i = 0; i < freqlen; i++) {
int32_t s = teletone_dds_state_modulate_sample(&tones[i], 0);
sample += s;
}
sample /= freqlen;
ts->buffer[ts->samples] = (teletone_audio_t)sample;
for (c = 1; c < ts->channels; c++) {
ts->buffer[ts->samples+1] = ts->buffer[ts->samples];
ts->samples++;
}
}
}
if (ts->dynamic) {
if (ensure_buffer(ts, wait)) {
return -1;
}
}
for (c = 0; c < ts->channels; c++) {
for (i = 0; i < wait && ts->samples < ts->datalen; i++) {
ts->buffer[ts->samples++] = 0;
}
}
if (ts->debug && ts->debug_stream) {
if (map->freqs[0] <= 0) {
fprintf(ts->debug_stream, "wait %d (%dms)\n", wait, wait / (ts->rate / 1000));
} else {
fprintf(ts->debug_stream, "Generate: (");
for (i = 0; i < TELETONE_MAX_TONES && map->freqs[i]; i++) {
fprintf(ts->debug_stream, "%s%0.2f", i == 0 ? "" : "+",map->freqs[i]);
}
fprintf(ts->debug_stream,
") [volume %0.2fdB; samples %d(%dms) x %d channel%s; wait %d(%dms); decay_factor %0.2fdB; decay_step %d(%dms); wrote %d bytes]\n",
ts->volume,
duration,
duration / (ts->rate / 1000),
ts->channels,
ts->channels == 1 ? "" : "s",
wait,
wait / (ts->rate / 1000),
ts->decay_factor,
ts->decay_step,
ts->decay_step / (ts->rate / 1000),
ts->samples * 2);
}
}
return ts->samples;
}
/* don't ask */
static char *my_strdup (const char *s)
{
size_t len = strlen (s) + 1;
void *new = malloc (len);
if (new == NULL) {
return NULL;
}
return (char *) memcpy (new, s, len);
}
int teletone_run(teletone_generation_session_t *ts, const char *cmd)
{
char *data = NULL, *cur = NULL, *end = NULL;
int var = 0, LOOPING = 0;
if (!cmd) {
return -1;
}
do {
if (!(data = my_strdup(cmd))) {
return -1;
}
cur = data;
while (*cur) {
var = 0;
if (*cur == ' ' || *cur == '\r' || *cur == '\n') {
cur++;
continue;
}
if ((end = strchr(cur, ';')) != 0) {
*end++ = '\0';
}
if (*(cur + 1) == '=') {
var = 1;
switch(*cur) {
case 'c':
ts->channels = atoi(cur + 2);
break;
case 'r':
ts->rate = atoi(cur + 2);
break;
case 'd':
ts->duration = atoi(cur + 2) * (ts->rate / 1000);
break;
case 'v':
{
float vol = (float)atof(cur + 2);
if (vol <= TELETONE_VOL_DB_MAX && vol >= TELETONE_VOL_DB_MIN) {
ts->volume = vol;
}
}
break;
case '>':
ts->decay_step = atoi(cur + 2) * (ts->rate / 1000);
ts->decay_direction = -1;
break;
case '<':
ts->decay_step = atoi(cur + 2) * (ts->rate / 1000);
ts->decay_direction = 1;
break;
case '+':
ts->decay_factor = (float)atof(cur + 2);
break;
case 'w':
ts->wait = atoi(cur + 2) * (ts->rate / 1000);
break;
case 'l':
ts->loops = atoi(cur + 2);
break;
case 'L':
if (!LOOPING) {
ts->LOOPS = atoi(cur + 2);
}
LOOPING++;
break;
}
} else {
while (*cur) {
char *p = NULL, *e = NULL;
teletone_tone_map_t mymap, *mapp = NULL;
if (*cur == ' ' || *cur == '\r' || *cur == '\n') {
cur++;
continue;
}
ts->tmp_duration = -1;
ts->tmp_wait = -1;
memset(&mymap, 0, sizeof(mymap));
if (*(cur + 1) == '(') {
p = cur + 2;
if (*cur) {
char *next;
int i = 0;
if ((e = strchr(p, ')')) != 0) {
*e++ = '\0';
}
do {
if ((next = strchr(p, ',')) != 0) {
*next++ = '\0';
}
if (i == 0) {
ts->tmp_duration = atoi(p) * (ts->rate / 1000);
i++;
} else if (i == 1) {
ts->tmp_wait = atoi(p) * (ts->rate / 1000);
i++;
} else {
mymap.freqs[i++ - 2] = atof(p);
}
p = next;
} while (next && (i-2) < TELETONE_MAX_TONES);
if (i > 2 && *cur == '%') {
mapp = &mymap;
} else if ((i != 2 || *cur == '%')) {
if (ts->debug && ts->debug_stream) {
fprintf(ts->debug_stream, "Syntax Error!\n");
}
goto bottom;
}
}
}
if (*cur && !mapp) {
if (*cur > 0 && *cur < TELETONE_TONE_RANGE) {
mapp = &ts->TONES[(int)*cur];
} else if (ts->debug && ts->debug_stream) {
fprintf(ts->debug_stream, "Map [%c] Out Of Range!\n", *cur);
}
}
if (mapp) {
if (mapp->freqs[0]) {
if (ts->handler) {
do {
ts->handler(ts, mapp);
if (ts->loops > 0) {
ts->loops--;
}
} while (ts->loops);
}
} else if (ts->debug && ts->debug_stream) {
fprintf(ts->debug_stream, "Ignoring Empty Map [%c]!\n", *cur);
}
}
if (e) {
cur = e;
} else {
cur++;
}
}
}
if (end) {
cur = end;
} else if (*cur){
cur++;
}
}
bottom:
free(data);
data = NULL;
if (ts->LOOPS > 0) {
ts->LOOPS--;
}
} while (ts->LOOPS);
return 0;
}
/* For Emacs:
* Local Variables:
* mode:c
* indent-tabs-mode:t
* tab-width:4
* c-basic-offset:4
* End:
* For VIM:
* vim:set softtabstop=4 shiftwidth=4 tabstop=4:
*/
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