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New Feature for chan_dahdi. 4 length pattern matching.

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In chan_dahdi.conf, the user can now use length 4 patterns in addition to the usual length 2 patterns.  The s
ntax remains the same and the method used to track the pattern history will only change when using the length
 4 patterns.

(closes issue SWP-3250)
Code:
        jrose
        rmudgett


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@312384 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Jonathan Rose
2011-04-01 17:01:01 +00:00
parent 3731fd9ccc
commit 846cfa0ef0
4 changed files with 108 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

68
main/dsp.c
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@@ -378,8 +378,7 @@ struct ast_dsp {
int ringtimeout;
int busymaybe;
int busycount;
int busy_tonelength;
int busy_quietlength;
struct ast_dsp_busy_pattern busy_cadence;
int historicnoise[DSP_HISTORY];
int historicsilence[DSP_HISTORY];
goertzel_state_t freqs[7];
@@ -1183,9 +1182,14 @@ int ast_dsp_busydetect(struct ast_dsp *dsp)
int avgsilence = 0, hitsilence = 0;
#endif
int avgtone = 0, hittone = 0;
if (!dsp->busymaybe) {
return res;
/* if we have a 4 length pattern, the way busymaybe is set doesn't help us. */
if (dsp->busy_cadence.length != 4) {
if (!dsp->busymaybe) {
return res;
}
}
for (x = DSP_HISTORY - dsp->busycount; x < DSP_HISTORY; x++) {
#ifndef BUSYDETECT_TONEONLY
avgsilence += dsp->historicsilence[x];
@@ -1239,23 +1243,60 @@ int ast_dsp_busydetect(struct ast_dsp *dsp)
res = 1;
#endif
}
/* If we have a 4-length pattern, we can go ahead and just check it in a different way. */
if (dsp->busy_cadence.length == 4) {
int x;
int errors = 0;
int errors_max = ((4 * dsp->busycount) / 100.0) * BUSY_PAT_PERCENT;
for (x = DSP_HISTORY - (dsp->busycount); x < DSP_HISTORY; x += 2) {
int temp_error;
temp_error = abs(dsp->historicnoise[x] - dsp->busy_cadence.pattern[0]);
if ((temp_error * 100) / dsp->busy_cadence.pattern[0] > BUSY_PERCENT) {
errors++;
}
temp_error = abs(dsp->historicnoise[x + 1] - dsp->busy_cadence.pattern[2]);
if ((temp_error * 100) / dsp->busy_cadence.pattern[2] > BUSY_PERCENT) {
errors++;
}
temp_error = abs(dsp->historicsilence[x] - dsp->busy_cadence.pattern[1]);
if ((temp_error * 100) / dsp->busy_cadence.pattern[1] > BUSY_PERCENT) {
errors++;
}
temp_error = abs(dsp->historicsilence[x + 1] - dsp->busy_cadence.pattern[3]);
if ((temp_error * 100) / dsp->busy_cadence.pattern[3] > BUSY_PERCENT) {
errors++;
}
}
ast_debug(5, "errors = %d max = %d\n", errors, errors_max);
if (errors <= errors_max) {
return 1;
}
}
/* If we know the expected busy tone length, check we are in the range */
if (res && (dsp->busy_tonelength > 0)) {
if (abs(avgtone - dsp->busy_tonelength) > (dsp->busy_tonelength*BUSY_PAT_PERCENT/100)) {
if (res && (dsp->busy_cadence.pattern[0] > 0)) {
if (abs(avgtone - dsp->busy_cadence.pattern[0]) > (dsp->busy_cadence.pattern[0]*BUSY_PAT_PERCENT/100)) {
#ifdef BUSYDETECT_DEBUG
ast_debug(5, "busy detector: avgtone of %d not close enough to desired %d\n",
avgtone, dsp->busy_tonelength);
avgtone, dsp->busy_cadence.pattern[0]);
#endif
res = 0;
}
}
#ifndef BUSYDETECT_TONEONLY
/* If we know the expected busy tone silent-period length, check we are in the range */
if (res && (dsp->busy_quietlength > 0)) {
if (abs(avgsilence - dsp->busy_quietlength) > (dsp->busy_quietlength*BUSY_PAT_PERCENT/100)) {
if (res && (dsp->busy_cadence.pattern[1] > 0)) {
if (abs(avgsilence - dsp->busy_cadence.pattern[1]) > (dsp->busy_cadence.pattern[1] * BUSY_PAT_PERCENT / 100)) {
#ifdef BUSYDETECT_DEBUG
ast_debug(5, "busy detector: avgsilence of %d not close enough to desired %d\n",
avgsilence, dsp->busy_quietlength);
avgsilence, dsp->busy_cadence.pattern[1]);
#endif
res = 0;
}
@@ -1571,11 +1612,10 @@ void ast_dsp_set_busy_count(struct ast_dsp *dsp, int cadences)
dsp->busycount = cadences;
}
void ast_dsp_set_busy_pattern(struct ast_dsp *dsp, int tonelength, int quietlength)
void ast_dsp_set_busy_pattern(struct ast_dsp *dsp, const struct ast_dsp_busy_pattern *cadence)
{
dsp->busy_tonelength = tonelength;
dsp->busy_quietlength = quietlength;
ast_debug(1, "dsp busy pattern set to %d,%d\n", tonelength, quietlength);
dsp->busy_cadence = *cadence;
ast_debug(1, "dsp busy pattern set to %d,%d,%d,%d\n", cadence->pattern[0], cadence->pattern[1], (cadence->length == 4) ? cadence->pattern[2] : 0, (cadence->length == 4) ? cadence->pattern[3] : 0);
}
void ast_dsp_digitreset(struct ast_dsp *dsp)