/* NB. this starts the input thread after some initial setup for the call leg */
void conference_loop_output(conference_member_t *member)
{
switch_channel_t *channel;
switch_frame_t write_frame = { 0 };
uint8_t *data = NULL;
switch_timer_t timer = { 0 };
uint32_t interval;
uint32_t samples;
//uint32_t csamples;
uint32_t tsamples;
uint32_t flush_len;
uint32_t low_count, bytes;
call_list_t *call_list, *cp;
switch_codec_implementation_t read_impl = { 0 };
int sanity;
switch_status_t st;
switch_core_session_get_read_impl(member->session, &read_impl);
channel = switch_core_session_get_channel(member->session);
interval = read_impl.microseconds_per_packet / 1000;
samples = switch_samples_per_packet(member->conference->rate, interval);
//csamples = samples;
tsamples = member->orig_read_impl.samples_per_packet;
low_count = 0;
bytes = samples * 2 * member->conference->channels;
call_list = NULL;
cp = NULL;
member->loop_loop = 0;
switch_assert(member->conference != NULL);
flush_len = switch_samples_per_packet(member->conference->rate, member->conference->interval) * 2 * member->conference->channels * (500 / member->conference->interval);
if (switch_core_timer_init(&timer, member->conference->timer_name, interval, tsamples, NULL) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(member->session), SWITCH_LOG_ERROR, "Timer Setup Failed. Conference Cannot Start\n");
return;
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(member->session), SWITCH_LOG_DEBUG, "Setup timer %s success interval: %u samples: %u\n",
member->conference->timer_name, interval, tsamples);
write_frame.data = data = switch_core_session_alloc(member->session, SWITCH_RECOMMENDED_BUFFER_SIZE);
write_frame.buflen = SWITCH_RECOMMENDED_BUFFER_SIZE;
write_frame.codec = &member->write_codec;
/* Start the input thread */
conference_loop_launch_input(member, switch_core_session_get_pool(member->session));
if ((call_list = switch_channel_get_private(channel, "_conference_autocall_list_"))) {
const char *cid_name = switch_channel_get_variable(channel, "conference_auto_outcall_caller_id_name");
const char *cid_num = switch_channel_get_variable(channel, "conference_auto_outcall_caller_id_number");
const char *toval = switch_channel_get_variable(channel, "conference_auto_outcall_timeout");
const char *flags = switch_channel_get_variable(channel, "conference_utils_auto_outcall_flags");
const char *profile = switch_channel_get_variable(channel, "conference_auto_outcall_profile");
const char *ann = switch_channel_get_variable(channel, "conference_auto_outcall_announce");
const char *prefix = switch_channel_get_variable(channel, "conference_auto_outcall_prefix");
const char *maxwait = switch_channel_get_variable(channel, "conference_auto_outcall_maxwait");
const char *delimiter_val = switch_channel_get_variable(channel, "conference_auto_outcall_delimiter");
int to = 60;
int wait_sec = 2;
int loops = 0;
if (ann && !switch_channel_test_app_flag_key("conference_silent", channel, CONF_SILENT_REQ)) {
member->conference->special_announce = switch_core_strdup(member->conference->pool, ann);
}
switch_channel_set_private(channel, "_conference_autocall_list_", NULL);
conference_utils_set_flag(member->conference, CFLAG_OUTCALL);
if (toval) {
to = atoi(toval);
if (to < 10 || to > 500) {
to = 60;
}
}
for (cp = call_list; cp; cp = cp->next) {
int argc;
char *argv[512] = { 0 };
char *cpstr = strdup(cp->string);
int x = 0;
switch_assert(cpstr);
if (!zstr(delimiter_val) && strlen(delimiter_val) == 1) {
char delimiter = *delimiter_val;
argc = switch_separate_string(cpstr, delimiter, argv, (sizeof(argv) / sizeof(argv[0])));
} else {
argc = switch_separate_string(cpstr, ',', argv, (sizeof(argv) / sizeof(argv[0])));
}
for (x = 0; x < argc; x++) {
char *dial_str = switch_mprintf("%s%s", switch_str_nil(prefix), argv[x]);
switch_assert(dial_str);
conference_outcall_bg(member->conference, NULL, NULL, dial_str, to, switch_str_nil(flags), cid_name, cid_num, NULL,
profile, &member->conference->cancel_cause, NULL);
switch_safe_free(dial_str);
}
switch_safe_free(cpstr);
}
if (maxwait) {
int tmp = atoi(maxwait);
if (tmp > 0) {
wait_sec = tmp;
}
}
loops = wait_sec * 10;
switch_channel_set_app_flag(channel, CF_APP_TAGGED);
do {
switch_ivr_sleep(member->session, 100, SWITCH_TRUE, NULL);
} while(switch_channel_up(channel) && (member->conference->originating && --loops));
switch_channel_clear_app_flag(channel, CF_APP_TAGGED);
if (!switch_channel_ready(channel)) {
member->conference->cancel_cause = SWITCH_CAUSE_ORIGINATOR_CANCEL;
goto end;
}
conference_member_play_file(member, "tone_stream://%(500,0,640)", 0, SWITCH_TRUE);
}
if (!conference_utils_test_flag(member->conference, CFLAG_ANSWERED)) {
switch_channel_answer(channel);
}
sanity = 2000;
while(!conference_utils_member_test_flag(member, MFLAG_ITHREAD) && sanity > 0) {
switch_cond_next();
sanity--;
}
/* Fair WARNING, If you expect the caller to hear anything or for digit handling to be processed, */
/* you better not block this thread loop for more than the duration of member->conference->timer_name! */
while (!member->loop_loop && conference_utils_member_test_flag(member, MFLAG_RUNNING) && conference_utils_member_test_flag(member, MFLAG_ITHREAD)
&& switch_channel_ready(channel)) {
switch_event_t *event;
int use_timer = 0;
switch_buffer_t *use_buffer = NULL;
uint32_t mux_used = 0;
//if (member->reset_media || switch_channel_test_flag(member->channel, CF_CONFERENCE_RESET_MEDIA)) {
// switch_cond_next();
// continue;
//}
switch_mutex_lock(member->write_mutex);
if (switch_channel_test_flag(member->channel, CF_CONFERENCE_ADV)) {
if (member->conference->la) {
conference_event_adv_la(member->conference, member, SWITCH_TRUE);
}
switch_channel_clear_flag(member->channel, CF_CONFERENCE_ADV);
}
if (switch_core_session_dequeue_event(member->session, &event, SWITCH_FALSE) == SWITCH_STATUS_SUCCESS) {
if (event->event_id == SWITCH_EVENT_MESSAGE) {
char *from = switch_event_get_header(event, "from");
char *to = switch_event_get_header(event, "to");
char *body = switch_event_get_body(event);
if (to && from && body) {
if (strchr(to, '+') && strncmp(to, CONF_CHAT_PROTO, strlen(CONF_CHAT_PROTO))) {
switch_event_del_header(event, "to");
switch_event_add_header(event, SWITCH_STACK_BOTTOM,
"to", "%s+%s@%s", CONF_CHAT_PROTO, member->conference->name, member->conference->domain);
} else {
switch_event_del_header(event, "to");
switch_event_add_header(event, SWITCH_STACK_BOTTOM, "to", "%s", member->conference->name);
}
chat_send(event);
}
}
switch_event_destroy(&event);
}
if (switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
/* test to see if outbound channel has answered */
if (switch_channel_test_flag(channel, CF_ANSWERED) && !conference_utils_test_flag(member->conference, CFLAG_ANSWERED)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(member->session), SWITCH_LOG_DEBUG,
"Outbound conference channel answered, setting CFLAG_ANSWERED\n");
conference_utils_set_flag(member->conference, CFLAG_ANSWERED);
}
} else {
if (conference_utils_test_flag(member->conference, CFLAG_ANSWERED) && !switch_channel_test_flag(channel, CF_ANSWERED)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(member->session), SWITCH_LOG_DEBUG, "CLFAG_ANSWERED set, answering inbound channel\n");
switch_channel_answer(channel);
}
}
use_buffer = NULL;
mux_used = (uint32_t) switch_buffer_inuse(member->mux_buffer);
use_timer = 1;
if (mux_used) {
if (mux_used < bytes) {
if (++low_count >= 5) {
/* partial frame sitting around this long is useless and builds delay */
conference_utils_member_set_flag_locked(member, MFLAG_FLUSH_BUFFER);
}
} else if (mux_used > flush_len) {
/* getting behind, clear the buffer */
conference_utils_member_set_flag_locked(member, MFLAG_FLUSH_BUFFER);
}
}
if (switch_channel_test_app_flag(channel, CF_APP_TAGGED)) {
conference_utils_member_set_flag_locked(member, MFLAG_FLUSH_BUFFER);
} else if (mux_used >= bytes) {
/* Flush the output buffer and write all the data (presumably muxed) back to the channel */
switch_mutex_lock(member->audio_out_mutex);
write_frame.data = data;
use_buffer = member->mux_buffer;
low_count = 0;
if ((write_frame.datalen = (uint32_t) switch_buffer_read(use_buffer, write_frame.data, bytes))) {
if (write_frame.datalen) {
write_frame.samples = write_frame.datalen / 2 / member->conference->channels;
if( !conference_utils_member_test_flag(member, MFLAG_CAN_HEAR)) {
memset(write_frame.data, 255, write_frame.datalen);
} else if (member->volume_out_level) { /* Check for output volume adjustments */
switch_change_sln_volume(write_frame.data, write_frame.samples * member->conference->channels, member->volume_out_level);
}
write_frame.timestamp = timer.samplecount;
if (member->fnode) {
conference_member_add_file_data(member, write_frame.data, write_frame.datalen);
}
conference_member_check_channels(&write_frame, member, SWITCH_FALSE);
if (switch_core_session_write_frame(member->session, &write_frame, SWITCH_IO_FLAG_NONE, 0) != SWITCH_STATUS_SUCCESS) {
switch_mutex_unlock(member->audio_out_mutex);
break;
}
}
}
switch_mutex_unlock(member->audio_out_mutex);
}
if (conference_utils_member_test_flag(member, MFLAG_FLUSH_BUFFER)) {
if (switch_buffer_inuse(member->mux_buffer)) {
switch_mutex_lock(member->audio_out_mutex);
switch_buffer_zero(member->mux_buffer);
switch_mutex_unlock(member->audio_out_mutex);
}
conference_utils_member_clear_flag_locked(member, MFLAG_FLUSH_BUFFER);
}
switch_mutex_unlock(member->write_mutex);
if (conference_utils_member_test_flag(member, MFLAG_INDICATE_MUTE)) {
if (!zstr(member->conference->muted_sound)) {
conference_member_play_file(member, member->conference->muted_sound, 0, SWITCH_TRUE);
} else {
char msg[512];
switch_snprintf(msg, sizeof(msg), "Muted");
conference_member_say(member, msg, 0);
}
conference_utils_member_clear_flag(member, MFLAG_INDICATE_MUTE);
}
if (conference_utils_member_test_flag(member, MFLAG_INDICATE_MUTE_DETECT)) {
if (!zstr(member->conference->mute_detect_sound)) {
conference_member_play_file(member, member->conference->mute_detect_sound, 0, SWITCH_TRUE);
} else {
char msg[512];
switch_snprintf(msg, sizeof(msg), "Currently Muted");
conference_member_say(member, msg, 0);
}
conference_utils_member_clear_flag(member, MFLAG_INDICATE_MUTE_DETECT);
}
if (conference_utils_member_test_flag(member, MFLAG_INDICATE_UNMUTE)) {
if (!zstr(member->conference->unmuted_sound)) {
conference_member_play_file(member, member->conference->unmuted_sound, 0, SWITCH_TRUE);
} else {
char msg[512];
switch_snprintf(msg, sizeof(msg), "Un-Muted");
conference_member_say(member, msg, 0);
}
conference_utils_member_clear_flag(member, MFLAG_INDICATE_UNMUTE);
}
if (switch_core_session_private_event_count(member->session)) {
switch_channel_set_app_flag(channel, CF_APP_TAGGED);
switch_ivr_parse_all_events(member->session);
switch_channel_clear_app_flag(channel, CF_APP_TAGGED);
conference_utils_member_set_flag_locked(member, MFLAG_FLUSH_BUFFER);
switch_core_session_set_read_codec(member->session, &member->read_codec);
} else {
switch_ivr_parse_all_messages(member->session);
}
if (use_timer) {
switch_core_timer_next(&timer);
} else {
switch_cond_next();
}
} /* Rinse ... Repeat */
end:
if (!member->loop_loop) {
conference_utils_member_clear_flag_locked(member, MFLAG_RUNNING);
/* Wait for the input thread to end */
if (member->input_thread) {
switch_thread_join(&st, member->input_thread);
member->input_thread = NULL;
}
}
switch_core_timer_destroy(&timer);
if (member->loop_loop) {
return;
}
switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_INFO, "Channel leaving conference, cause: %s\n",
switch_channel_cause2str(switch_channel_get_cause(channel)));
/* if it's an outbound channel, store the release cause in the conference struct, we might need it */
if (switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
member->conference->bridge_hangup_cause = switch_channel_get_cause(channel);
}
}
/* marshall frames from the call leg to the conference thread for muxing to other call legs */
void *SWITCH_THREAD_FUNC conference_loop_input(switch_thread_t *thread, void *obj)
{
switch_event_t *event;
conference_member_t *member = obj;
switch_channel_t *channel;
switch_status_t status;
switch_frame_t *read_frame = NULL;
uint32_t hangover = 40, hangunder = 5, hangover_hits = 0, hangunder_hits = 0, diff_level = 400;
switch_core_session_t *session = member->session;
uint32_t flush_len;
switch_frame_t tmp_frame = { 0 };
if (switch_core_session_read_lock(session) != SWITCH_STATUS_SUCCESS) {
goto end;
}
switch_assert(member != NULL);
conference_utils_member_clear_flag_locked(member, MFLAG_TALKING);
channel = switch_core_session_get_channel(session);
switch_core_session_get_read_impl(session, &member->read_impl);
switch_channel_audio_sync(channel);
flush_len = switch_samples_per_packet(member->conference->rate, member->conference->interval) * 2 * member->conference->channels * (500 / member->conference->interval);
/* As long as we have a valid read, feed that data into an input buffer where the conference thread will take it
and mux it with any audio from other channels. */
while (conference_utils_member_test_flag(member, MFLAG_RUNNING) && switch_channel_ready(channel)) {
if (switch_channel_ready(channel) && switch_channel_test_app_flag(channel, CF_APP_TAGGED)) {
switch_yield(100000);
continue;
}
/* Read a frame. */
status = switch_core_session_read_frame(session, &read_frame, SWITCH_IO_FLAG_NONE, 0);
switch_mutex_lock(member->read_mutex);
/* end the loop, if appropriate */
if (!SWITCH_READ_ACCEPTABLE(status) || !conference_utils_member_test_flag(member, MFLAG_RUNNING)) {
switch_mutex_unlock(member->read_mutex);
break;
}
if (switch_channel_test_flag(channel, CF_VIDEO) && !conference_utils_member_test_flag(member, MFLAG_ACK_VIDEO)) {
conference_utils_member_set_flag_locked(member, MFLAG_ACK_VIDEO);
conference_video_check_avatar(member, SWITCH_FALSE);
switch_core_session_video_reinit(member->session);
conference_video_set_floor_holder(member->conference, member, SWITCH_FALSE);
} else if (conference_utils_member_test_flag(member, MFLAG_ACK_VIDEO) && !switch_channel_test_flag(channel, CF_VIDEO)) {
conference_video_check_avatar(member, SWITCH_FALSE);
}
/* if we have caller digits, feed them to the parser to find an action */
if (switch_channel_has_dtmf(channel)) {
char dtmf[128] = "";
switch_channel_dequeue_dtmf_string(channel, dtmf, sizeof(dtmf));
if (conference_utils_member_test_flag(member, MFLAG_DIST_DTMF)) {
conference_member_send_all_dtmf(member, member->conference, dtmf);
} else if (member->dmachine) {
char *p;
char str[2] = "";
for (p = dtmf; p && *p; p++) {
str[0] = *p;
switch_ivr_dmachine_feed(member->dmachine, str, NULL);
}
}
} else if (member->dmachine) {
switch_ivr_dmachine_ping(member->dmachine, NULL);
}
if (switch_queue_size(member->dtmf_queue)) {
switch_dtmf_t *dt;
void *pop;
if (switch_queue_trypop(member->dtmf_queue, &pop) == SWITCH_STATUS_SUCCESS) {
dt = (switch_dtmf_t *) pop;
switch_core_session_send_dtmf(member->session, dt);
free(dt);
}
}
if (switch_channel_test_flag(member->channel, CF_CONFERENCE_RESET_MEDIA)) {
member->reset_media = 10;
switch_channel_audio_sync(member->channel);
switch_channel_clear_flag(member->channel, CF_CONFERENCE_RESET_MEDIA);
}
if (member->reset_media) {
if (--member->reset_media > 0) {
goto do_continue;
}
if (conference_member_setup_media(member, member->conference)) {
switch_mutex_unlock(member->read_mutex);
break;
}
member->loop_loop = 1;
goto do_continue;
}
if (switch_test_flag(read_frame, SFF_CNG)) {
if (member->conference->agc_level) {
member->nt_tally++;
}
if (hangunder_hits) {
hangunder_hits--;
}
if (conference_utils_member_test_flag(member, MFLAG_TALKING)) {
if (++hangover_hits >= hangover) {
hangover_hits = hangunder_hits = 0;
conference_utils_member_clear_flag_locked(member, MFLAG_TALKING);
conference_member_update_status_field(member);
conference_member_check_agc_levels(member);
conference_member_clear_avg(member);
member->score_iir = 0;
member->floor_packets = 0;
if (test_eflag(member->conference, EFLAG_STOP_TALKING) &&
switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, CONF_EVENT_MAINT) == SWITCH_STATUS_SUCCESS) {
conference_member_add_event_data(member, event);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Action", "stop-talking");
switch_event_fire(&event);
}
}
}
goto do_continue;
}
if (member->nt_tally > (int32_t)(member->read_impl.actual_samples_per_second / member->read_impl.samples_per_packet) * 3) {
member->agc_volume_in_level = 0;
conference_member_clear_avg(member);
}
/* Check for input volume adjustments */
if (!member->conference->agc_level) {
member->conference->agc_level = 0;
conference_member_clear_avg(member);
}
/* if the member can speak, compute the audio energy level and */
/* generate events when the level crosses the threshold */
if ((conference_utils_member_test_flag(member, MFLAG_CAN_SPEAK) || conference_utils_member_test_flag(member, MFLAG_MUTE_DETECT))) {
uint32_t energy = 0, i = 0, samples = 0, j = 0;
int16_t *data;
int agc_period = (member->read_impl.actual_samples_per_second / member->read_impl.samples_per_packet) / 4;
data = read_frame->data;
member->score = 0;
if (member->volume_in_level) {
switch_change_sln_volume(read_frame->data, (read_frame->datalen / 2) * member->conference->channels, member->volume_in_level);
}
if (member->agc_volume_in_level) {
switch_change_sln_volume_granular(read_frame->data, (read_frame->datalen / 2) * member->conference->channels, member->agc_volume_in_level);
}
if ((samples = read_frame->datalen / sizeof(*data) / member->read_impl.number_of_channels)) {
for (i = 0; i < samples; i++) {
energy += abs(data[j]);
j += member->read_impl.number_of_channels;
}
member->score = energy / samples;
}
if (member->vol_period) {
member->vol_period--;
}
if (member->conference->agc_level && member->score &&
conference_utils_member_test_flag(member, MFLAG_CAN_SPEAK) &&
conference_member_noise_gate_check(member)
) {
int last_shift = abs((int)(member->last_score - member->score));
if (member->score && member->last_score && last_shift > 900) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG7,
"AGC %s:%d drop anomalous shift of %d\n",
member->conference->name,
member->id, last_shift);
} else {
member->avg_tally += member->score;
member->avg_itt++;
if (!member->avg_itt) member->avg_itt++;
member->avg_score = member->avg_tally / member->avg_itt;
}
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG7,
"AGC %s:%d diff:%d level:%d cur:%d avg:%d vol:%d\n",
member->conference->name,
member->id, member->conference->agc_level - member->avg_score, member->conference->agc_level,
member->score, member->avg_score, member->agc_volume_in_level);
if (++member->agc_concur >= agc_period) {
if (!member->vol_period) {
conference_member_check_agc_levels(member);
}
member->agc_concur = 0;
}
} else {
member->nt_tally++;
}
member->score_iir = (int) (((1.0 - SCORE_DECAY) * (float) member->score) + (SCORE_DECAY * (float) member->score_iir));
if (member->score_iir > SCORE_MAX_IIR) {
member->score_iir = SCORE_MAX_IIR;
}
if (conference_member_noise_gate_check(member)) {
uint32_t diff = member->score - member->energy_level;
if (hangover_hits) {
hangover_hits--;
}
if (member->conference->agc_level) {
member->nt_tally = 0;
}
if (member == member->conference->floor_holder) {
member->floor_packets++;
}
if (diff >= diff_level || ++hangunder_hits >= hangunder) {
hangover_hits = hangunder_hits = 0;
member->last_talking = switch_epoch_time_now(NULL);
if (!conference_utils_member_test_flag(member, MFLAG_TALKING)) {
conference_utils_member_set_flag_locked(member, MFLAG_TALKING);
conference_member_update_status_field(member);
member->floor_packets = 0;
if (test_eflag(member->conference, EFLAG_START_TALKING) && conference_utils_member_test_flag(member, MFLAG_CAN_SPEAK) &&
switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, CONF_EVENT_MAINT) == SWITCH_STATUS_SUCCESS) {
conference_member_add_event_data(member, event);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Action", "start-talking");
switch_event_fire(&event);
}
if (conference_utils_member_test_flag(member, MFLAG_MUTE_DETECT) && !conference_utils_member_test_flag(member, MFLAG_CAN_SPEAK)) {
if (!zstr(member->conference->mute_detect_sound)) {
conference_utils_member_set_flag(member, MFLAG_INDICATE_MUTE_DETECT);
}
if (test_eflag(member->conference, EFLAG_MUTE_DETECT) &&
switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, CONF_EVENT_MAINT) == SWITCH_STATUS_SUCCESS) {
conference_member_add_event_data(member, event);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Action", "mute-detect");
switch_event_fire(&event);
}
}
}
}
} else {
if (hangunder_hits) {
hangunder_hits--;
}
if (member->conference->agc_level) {
member->nt_tally++;
}
if (conference_utils_member_test_flag(member, MFLAG_TALKING) && conference_utils_member_test_flag(member, MFLAG_CAN_SPEAK)) {
switch_event_t *event;
if (++hangover_hits >= hangover) {
hangover_hits = hangunder_hits = 0;
conference_utils_member_clear_flag_locked(member, MFLAG_TALKING);
conference_member_update_status_field(member);
conference_member_check_agc_levels(member);
conference_member_clear_avg(member);
if (test_eflag(member->conference, EFLAG_STOP_TALKING) &&
switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, CONF_EVENT_MAINT) == SWITCH_STATUS_SUCCESS) {
conference_member_add_event_data(member, event);
switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Action", "stop-talking");
switch_event_fire(&event);
}
}
}
}
member->last_score = member->score;
if (member == member->conference->floor_holder) {
if (member->id != member->conference->video_floor_holder &&
(member->floor_packets > member->conference->video_floor_packets || member->energy_level == 0)) {
conference_video_set_floor_holder(member->conference, member, SWITCH_FALSE);
}
}
}
/* skip frames that are not actual media or when we are muted or silent */
if ((conference_utils_member_test_flag(member, MFLAG_TALKING) || member->energy_level == 0 || conference_utils_test_flag(member->conference, CFLAG_AUDIO_ALWAYS))
&& conference_utils_member_test_flag(member, MFLAG_CAN_SPEAK) && !conference_utils_test_flag(member->conference, CFLAG_WAIT_MOD)
&& (member->conference->count > 1 || (member->conference->record_count && member->conference->count >= member->conference->min_recording_participants))) {
switch_audio_resampler_t *read_resampler = member->read_resampler;
void *data;
uint32_t datalen;
if (read_resampler) {
int16_t *bptr = (int16_t *) read_frame->data;
int len = (int) read_frame->datalen;
switch_resample_process(read_resampler, bptr, len / 2 / member->read_impl.number_of_channels);
memcpy(member->resample_out, read_resampler->to, read_resampler->to_len * 2 * member->read_impl.number_of_channels);
len = read_resampler->to_len * 2 * member->read_impl.number_of_channels;
datalen = len;
data = member->resample_out;
} else {
data = read_frame->data;
datalen = read_frame->datalen;
}
tmp_frame.data = data;
tmp_frame.datalen = datalen;
tmp_frame.rate = member->conference->rate;
conference_member_check_channels(&tmp_frame, member, SWITCH_TRUE);
if (datalen) {
switch_size_t ok = 1;
/* Write the audio into the input buffer */
switch_mutex_lock(member->audio_in_mutex);
if (switch_buffer_inuse(member->audio_buffer) > flush_len) {
switch_buffer_toss(member->audio_buffer, tmp_frame.datalen);
}
ok = switch_buffer_write(member->audio_buffer, tmp_frame.data, tmp_frame.datalen);
switch_mutex_unlock(member->audio_in_mutex);
if (!ok) {
switch_mutex_unlock(member->read_mutex);
break;
}
}
}
do_continue:
switch_mutex_unlock(member->read_mutex);
}
if (switch_queue_size(member->dtmf_queue)) {
switch_dtmf_t *dt;
void *pop;
while (switch_queue_trypop(member->dtmf_queue, &pop) == SWITCH_STATUS_SUCCESS) {
dt = (switch_dtmf_t *) pop;
free(dt);
}
}
switch_resample_destroy(&member->read_resampler);
switch_core_session_rwunlock(session);
end:
conference_utils_member_clear_flag_locked(member, MFLAG_ITHREAD);
return NULL;
}
/**
* Read from file
* @param handle
* @param data
* @param len
* @return
*/
static switch_status_t fileman_file_read(switch_file_handle_t *handle, void *data, size_t *len)
{
struct fileman_file_context *context = (struct fileman_file_context *)handle->private_info;
switch_file_handle_t *fh = &context->fh;
switch_status_t status = SWITCH_STATUS_SUCCESS;
switch_size_t o_len = 0;
/* anything called "_len" is measured in 2-byte samples */
if (switch_test_flag(fh, SWITCH_FILE_NATIVE)) {
return switch_core_file_read(fh, data, len);
}
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "len = %"SWITCH_SIZE_T_FMT"\n", *len);
if (*len > context->max_frame_len) {
*len = context->max_frame_len;
}
for (;;) {
int do_speed = 1;
int last_speed = -1;
size_t read_bytes = 0;
if (switch_test_flag(handle, SWITCH_FILE_PAUSE)) {
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Read pause frame\n");
memset(context->abuf, 255, *len * 2);
do_speed = 0;
o_len = *len;
} else if (fh->sp_audio_buffer && (context->eof || (switch_buffer_inuse(fh->sp_audio_buffer) > (switch_size_t) (*len * 2)))) {
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Read speed frame\n");
/* get next speed frame */
if (!(read_bytes = switch_buffer_read(fh->sp_audio_buffer, context->abuf, *len * 2))) {
/* This is the reverse of what happens in switch_ivr_play_file... i think that implementation is wrong */
if (context->eof) {
/* done with file */
status = SWITCH_STATUS_FALSE;
goto done;
} else {
/* try again to fetch frame */
continue;
}
}
/* pad short frame with silence */
if (read_bytes < *len * 2) {
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Padding speed frame %"SWITCH_SIZE_T_FMT" bytes\n", (context->frame_len * 2) - read_bytes);
memset(context->abuf + read_bytes, 255, (*len * 2) - read_bytes);
}
o_len = *len;
do_speed = 0;
} else if (fh->audio_buffer && (context->eof || (switch_buffer_inuse(fh->audio_buffer) > (switch_size_t) (*len * 2)))) {
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "(2) Read audio frame\n");
/* get next file frame */
if (!(read_bytes = switch_buffer_read(fh->audio_buffer, context->abuf, *len * 2))) {
if (context->eof) {
/* done with file */
status = SWITCH_STATUS_FALSE;
goto done;
} else {
/* try again to fetch frame */
continue;
}
}
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "(2) Read audio frame %"SWITCH_SIZE_T_FMT" bytes\n", read_bytes);
fh->offset_pos += read_bytes / 2;
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "(2) file pos = %i\n", fh->offset_pos);
/* pad short frame with silence */
if (read_bytes < (*len * 2)) {
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Padding audio frame %"SWITCH_SIZE_T_FMT" bytes\n", (context->frame_len * 2) - read_bytes);
memset(context->abuf + read_bytes, 255, (*len * 2) - read_bytes);
}
o_len = *len;
} else {
if (context->eof) {
/* done with file */
status = SWITCH_STATUS_FALSE;
goto done;
}
o_len = FILE_STARTBYTES / 2;
if (switch_core_file_read(fh, context->abuf, &o_len) != SWITCH_STATUS_SUCCESS) {
context->eof++;
/* at end of file... need to clear buffers before giving up */
continue;
}
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Read file %"SWITCH_SIZE_T_FMT" bytes\n", o_len * 2);
/* add file data to audio bufer */
read_bytes = switch_buffer_write(fh->audio_buffer, context->abuf, o_len * 2);
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Write audio frame %"SWITCH_SIZE_T_FMT" bytes\n", read_bytes);
read_bytes = switch_buffer_read(fh->audio_buffer, context->abuf, *len * 2);
o_len = read_bytes / 2;
fh->offset_pos += o_len;
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Read audio frame %"SWITCH_SIZE_T_FMT" bytes\n", read_bytes);
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "file pos = %i\n", fh->offset_pos);
}
if (o_len <= 0) {
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "o_len <= 0 (%"SWITCH_SIZE_T_FMT")\n", o_len);
status = SWITCH_STATUS_FALSE;
goto done;
}
/* limit speed... there is a .25 factor change in packet size relative to original packet size for each increment.
Too many increments and we cause badness when (factor * speed * o_len) > o_len */
if (handle->speed > 2) {
handle->speed = 2;
} else if (handle->speed < -2) {
handle->speed = -2;
}
if (fh->audio_buffer && last_speed > -1 && last_speed != handle->speed) {
/* speed has changed, flush the buffer */
switch_buffer_zero(fh->sp_audio_buffer);
}
if (switch_test_flag(fh, SWITCH_FILE_SEEK)) {
/* file position has changed flush the buffer */
switch_buffer_zero(fh->audio_buffer);
switch_clear_flag(fh, SWITCH_FILE_SEEK);
}
/* generate speed frames */
if (handle->speed && do_speed) {
float factor = 0.25f * abs(handle->speed);
switch_size_t new_len, supplement_len, step_len;
short *bp = context->abuf;
switch_size_t wrote_len = 0;
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Generate speed frame (%i)\n", handle->speed);
supplement_len = (int) (factor * o_len);
if (!supplement_len) {
supplement_len = 1;
}
new_len = (handle->speed > 0) ? o_len - supplement_len : o_len + supplement_len;
step_len = (handle->speed > 0) ? (new_len / supplement_len) : (o_len / supplement_len);
if (!fh->sp_audio_buffer) {
switch_buffer_create_dynamic(&fh->sp_audio_buffer, 1024, 1024, 0);
}
while ((wrote_len + step_len) < new_len) {
switch_buffer_write(fh->sp_audio_buffer, bp, step_len * 2);
wrote_len += step_len;
bp += step_len;
if (handle->speed > 0) {
bp++;
} else {
float f;
short s;
f = (float) (*bp + *(bp + 1) + *(bp - 1));
f /= 3;
s = (short) f;
switch_buffer_write(fh->sp_audio_buffer, &s, 2);
wrote_len++;
}
}
if (wrote_len < new_len) {
switch_size_t r_len = new_len - wrote_len;
switch_buffer_write(fh->sp_audio_buffer, bp, r_len * 2);
wrote_len += r_len;
}
last_speed = handle->speed;
continue;
}
/* adjust volume on frame */
if (handle->vol) {
//switch_log_printf(SWITCH_CHANNEL_UUID_LOG(context->uuid), SWITCH_LOG_DEBUG, "Adjust volume to = %i\n", handle->vol);
switch_change_sln_volume(context->abuf, *len, handle->vol);
}
break;
}
done:
/* copy frame over to return to caller */
memcpy(data, context->abuf, *len * 2);
handle->offset_pos = context->fh.offset_pos;
return status;
}