static void spandsp_dtmf_rx_realtime_callback(void *user_data, int code, int level, int duration)
{
switch_inband_dtmf_t *pvt = (switch_inband_dtmf_t *)user_data;
char digit = (char)code;
pvt->samples += duration;
if (digit) {
/* prevent duplicate DTMF */
if (digit != pvt->last_digit || (pvt->samples - pvt->last_digit_end) > pvt->min_dup_digit_spacing) {
switch_dtmf_t dtmf = {0};
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_DEBUG, "DTMF BEGIN DETECTED: [%c]\n", digit);
pvt->last_digit = digit;
dtmf.digit = digit;
dtmf.duration = switch_core_default_dtmf_duration(0);
dtmf.source = SWITCH_DTMF_INBAND_AUDIO;
switch_channel_queue_dtmf(switch_core_session_get_channel(pvt->session), &dtmf);
pvt->digit_begin = pvt->samples;
} else {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_DEBUG, "DUP DTMF DETECTED: [%c]\n", digit);
pvt->last_digit_end = pvt->samples;
}
} else {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_DEBUG, "DTMF END DETECTED: [%c], duration = %u ms\n", pvt->last_digit, (pvt->samples - pvt->digit_begin) / 8);
pvt->last_digit_end = pvt->samples;
}
}
static switch_status_t channel_send_dtmf(switch_core_session_t *session, const switch_dtmf_t *dtmf)
{
private_t *tech_pvt = NULL;
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt != NULL);
if (tech_pvt->other_channel) {
switch_channel_queue_dtmf(tech_pvt->other_channel, dtmf);
}
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t cb_on_dtmf_ignore(switch_core_session_t *session, void *input, switch_input_type_t itype, void *buf, unsigned int buflen)
{
switch (itype) {
case SWITCH_INPUT_TYPE_DTMF:
{
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_dtmf_t *dtmf = (switch_dtmf_t *) input;
switch_channel_queue_dtmf(channel, dtmf);
return SWITCH_STATUS_BREAK;
}
default:
break;
}
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id)
{
crtp_private_t *tech_pvt;
switch_channel_t *channel;
switch_status_t status;
channel = switch_core_session_get_channel(session);
assert(channel != NULL);
tech_pvt = switch_core_session_get_private(session);
assert(tech_pvt != NULL);
if (!tech_pvt->rtp_session || tech_pvt->mode == RTP_SENDONLY) {
switch_yield(20000); /* replace by local timer XXX */
goto cng;
}
if (switch_rtp_has_dtmf(tech_pvt->rtp_session)) {
switch_dtmf_t dtmf = { 0 };
switch_rtp_dequeue_dtmf(tech_pvt->rtp_session, &dtmf);
switch_channel_queue_dtmf(channel, &dtmf);
}
tech_pvt->read_frame.flags = SFF_NONE;
tech_pvt->read_frame.codec = &tech_pvt->read_codec;
status = switch_rtp_zerocopy_read_frame(tech_pvt->rtp_session, &tech_pvt->read_frame, flags);
if (status != SWITCH_STATUS_SUCCESS && status != SWITCH_STATUS_BREAK) {
goto cng;
}
*frame = &tech_pvt->read_frame;
return SWITCH_STATUS_SUCCESS;
cng:
*frame = &tech_pvt->read_frame;
tech_pvt->read_frame.codec = &tech_pvt->read_codec;
tech_pvt->read_frame.flags |= SFF_CNG;
tech_pvt->read_frame.datalen = 0;
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id)
{
ftdm_wait_flag_t wflags = FTDM_READ;
ftdm_status_t status;
ctdm_private_t *tech_pvt;
const char *name;
switch_channel_t *channel;
int chunk;
uint32_t span_id, chan_id;
ftdm_size_t len;
char dtmf[128] = "";
channel = switch_core_session_get_channel(session);
assert(channel != NULL);
tech_pvt = switch_core_session_get_private(session);
assert(tech_pvt != NULL);
name = switch_channel_get_name(channel);
top:
wflags = FTDM_READ;
chunk = ftdm_channel_get_io_interval(tech_pvt->ftdm_channel) * 2;
status = ftdm_channel_wait(tech_pvt->ftdm_channel, &wflags, chunk);
span_id = ftdm_channel_get_span_id(tech_pvt->ftdm_channel);
chan_id = ftdm_channel_get_id(tech_pvt->ftdm_channel);
if (status == FTDM_FAIL) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to read from channel %s device %d:%d!\n", name, span_id, chan_id);
goto fail;
}
if (status == FTDM_TIMEOUT) {
goto top;
}
if (!(wflags & FTDM_READ)) {
goto top;
}
len = tech_pvt->read_frame.buflen;
if (ftdm_channel_read(tech_pvt->ftdm_channel, tech_pvt->read_frame.data, &len) != FTDM_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Failed to read from channel %s device %d:%d!\n", name, span_id, chan_id);
}
*frame = &tech_pvt->read_frame;
tech_pvt->read_frame.datalen = (uint32_t)len;
tech_pvt->read_frame.samples = tech_pvt->read_frame.datalen;
tech_pvt->read_frame.codec = &tech_pvt->read_codec;
if (ftdm_channel_get_codec(tech_pvt->ftdm_channel) == FTDM_CODEC_SLIN) {
tech_pvt->read_frame.samples /= 2;
}
while (ftdm_channel_dequeue_dtmf(tech_pvt->ftdm_channel, dtmf, sizeof(dtmf))) {
switch_dtmf_t _dtmf = { 0, switch_core_default_dtmf_duration(0) };
char *p;
for (p = dtmf; p && *p; p++) {
if (is_dtmf(*p)) {
_dtmf.digit = *p;
ftdm_log(FTDM_LOG_DEBUG, "Queuing DTMF [%c] in channel %s device %d:%d\n", *p, name, span_id, chan_id);
switch_channel_queue_dtmf(channel, &_dtmf);
}
}
}
return SWITCH_STATUS_SUCCESS;
fail:
return SWITCH_STATUS_GENERR;
}
