MPF_DECLARE(void) mpf_dtmf_detector_get_frame(
struct mpf_dtmf_detector_t *detector,
const struct mpf_frame_t *frame)
{
if ((detector->band & MPF_DTMF_DETECTOR_OUTBAND) &&
(frame->type & MEDIA_FRAME_TYPE_EVENT) &&
(frame->event_frame.event_id <= DTMF_EVENT_ID_MAX) &&
(frame->marker == MPF_MARKER_START_OF_EVENT))
{
if (detector->band & MPF_DTMF_DETECTOR_INBAND) {
detector->band &= ~MPF_DTMF_DETECTOR_INBAND;
apt_log(APT_LOG_MARK, APT_PRIO_INFO, "Out-of-band digit arrived, turning "
"in-band DTMF detector off");
}
mpf_dtmf_detector_add_digit(detector, mpf_event_id_to_dtmf_char(
frame->event_frame.event_id));
return;
}
if ((detector->band & MPF_DTMF_DETECTOR_INBAND) && (frame->type & MEDIA_FRAME_TYPE_AUDIO)) {
apr_int16_t *samples = frame->codec_frame.buffer;
apr_size_t i;
for (i = 0; i < frame->codec_frame.size / 2; i++) {
goertzel_sample(detector, samples[i]);
if (++detector->nsamples >= detector->wsamples) {
goertzel_energies_digit(detector);
detector->nsamples = 0;
}
}
}
}
static inline void goertzel_update(goertzel_state_t *s, short *samps, int count)
{
int i;
for (i=0;i<count;i++)
goertzel_sample(s, samps[i]);
}
//For all samples, update the goertzel_state_t variable
void CGoertzelDTMFFax::goertzel_update(goertzel_state_t* s, short* samps, int count)
{
int i;
for (i=0;i<count;i++)
goertzel_sample(s, samps[i]);
}