static void stateful_analyzer_suggest_action(MSQosAnalyzer *objbase, MSRateControlAction *action){
MSStatefulQosAnalyzer *obj=(MSStatefulQosAnalyzer*)objbase;
float curbw = obj->latest ? obj->latest->bandwidth : 0.f;
float bw = compute_available_bw(obj);
/*try a burst every 50 seconds (10 RTCP packets)*/
if (obj->curindex % 10 == 0){
ms_debug("MSQosStatefulAnalyzer[%p]: try burst!", obj);
obj->burst_state = MSStatefulQosAnalyzerBurstEnable;
}
/*test a min burst to avoid overestimation of available bandwidth*/
else if (obj->curindex % 10 == 2 || obj->curindex % 10 == 3){
ms_debug("MSQosStatefulAnalyzer[%p]: try minimal burst!", obj);
bw *= .33;
}
/*no bandwidth estimation computed*/
if (bw <= 0 || curbw <= 0){
action->type=MSRateControlActionDoNothing;
action->value=0;
}else if (bw > curbw){
action->type=MSRateControlActionIncreaseQuality;
action->value=MAX(0, 100. * (bw / curbw - 1));
}else{
action->type=MSRateControlActionDecreaseBitrate;
action->value=MAX(10, -100. * (bw / curbw - 1));
}
ms_debug("MSQosStatefulAnalyzer[%p]: %s of value %d",
obj, ms_rate_control_action_type_name(action->type), action->value);
}
static void stateful_analyzer_suggest_action(MSQosAnalyzer *objbase, MSRateControlAction *action){
MSStatefulQosAnalyzer *obj=(MSStatefulQosAnalyzer*)objbase;
float curbw = 0;
float bw = 0;
rtcpstatspoint_t* greatest_pt = NULL;
/*if this is the first measure, there is not enough reliable data to use; we
assume loss rate is due to non congestionned network. This is mainly useful
in the case loss rate is high (>30%), to reduce quality even before the second
RTCP report which can be really used.
*/
if (obj->curindex==1){
if (obj->network_loss_rate!=0.f){
action->type=MSRateControlActionDecreaseBitrate;
action->value=obj->network_loss_rate;
}
}else {
curbw = obj->latest ? obj->latest->bandwidth : 0.f;
bw = compute_available_bw(obj);
greatest_pt = ms_list_size(obj->rtcpstatspoint) ?
(rtcpstatspoint_t*)ms_list_nth_data(obj->rtcpstatspoint, ms_list_size(obj->rtcpstatspoint)-1)
: NULL;
/*try a burst every 50 seconds (10 RTCP packets)*/
if (obj->curindex % 10 == 6){
ms_message("MSStatefulQosAnalyzer[%p]: try burst!", obj);
obj->burst_state = MSStatefulQosAnalyzerBurstEnable;
}
/*test a min burst to avoid overestimation of available bandwidth but only
if there is some loss*/
else if (greatest_pt!=NULL && greatest_pt->loss_percent>1
&& (obj->curindex % 10 == 2 || obj->curindex % 10 == 3)){
ms_message("MSStatefulQosAnalyzer[%p]: try minimal burst!", obj);
bw *= .33;
}
/*no bandwidth estimation computed*/
if (bw <= 0 || curbw <= 0){
action->type=MSRateControlActionDoNothing;
action->value=0;
}else if (bw > curbw){
action->type=MSRateControlActionIncreaseQuality;
action->value=MAX(0, 100. * (bw / curbw - 1));
}else{
action->type=MSRateControlActionDecreaseBitrate;
action->value=MAX(10, -100. * (bw / curbw - 1));
}
}
ms_message("MSStatefulQosAnalyzer[%p]: %s of value %d",
obj, ms_rate_control_action_type_name(action->type), action->value);
if (objbase->on_action_suggested!=NULL){
int i;
char *data[4];
int datac = sizeof(data) / sizeof(data[0]);
data[0]=ms_strdup("%loss rtt_ms cur_bw");
data[1]=ms_strdup_printf("%d %d %d"
, obj->latest?(int)obj->latest->loss_percent:0
, obj->latest?(int)obj->latest->rtt:0
, obj->latest?(int)obj->latest->bandwidth:0
);
data[2]=ms_strdup("action_type action_value est_bw");
data[3]=ms_strdup_printf("%s %d %d"
, ms_rate_control_action_type_name(action->type)
, action->value
, (int)bw
);
objbase->on_action_suggested(objbase->on_action_suggested_user_pointer, datac, (const char**)data);
for (i=0;i<datac;++i){
ms_free(data[i]);
}
}
}