bool_t linphone_core_is_payload_type_usable_for_bandwidth(LinphoneCore *lc, PayloadType *pt, int bandwidth_limit)
{
double codec_band;
bool_t ret=FALSE;
switch (pt->type){
case PAYLOAD_AUDIO_CONTINUOUS:
case PAYLOAD_AUDIO_PACKETIZED:
codec_band=get_audio_payload_bandwidth(lc,pt);
ret=bandwidth_is_greater(bandwidth_limit*1000,codec_band);
/*hack to avoid using uwb codecs when having low bitrate and video*/
if (bandwidth_is_greater(199,bandwidth_limit)){
if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
ret=FALSE;
}
}
//ms_message("Payload %s: %g",pt->mime_type,codec_band);
break;
case PAYLOAD_VIDEO:
if (bandwidth_limit!=0) {/* infinite (-1) or strictly positive*/
ret=TRUE;
}
else ret=FALSE;
break;
}
return ret;
}
/*this function makes a special case for speex/8000.
This codec is variable bitrate. The 8kbit/s mode is interesting when having a low upload bandwidth, but its quality
is not very good. We 'd better use its 15kbt/s mode when we have enough bandwidth*/
static int get_codec_bitrate(LinphoneCore *lc, const PayloadType *pt){
int upload_bw=linphone_core_get_upload_bandwidth(lc);
if (bandwidth_is_greater(upload_bw,129) || (bandwidth_is_greater(upload_bw,33) && !linphone_core_video_enabled(lc)) ) {
if (strcmp(pt->mime_type,"speex")==0 && pt->clock_rate==8000){
return 15000;
}
}
return pt->normal_bitrate;
}
/* return TRUE if codec can be used with bandwidth, FALSE else*/
bool_t linphone_core_check_payload_type_usability(LinphoneCore *lc, PayloadType *pt)
{
double codec_band;
int allowed_bw,video_bw;
bool_t ret=FALSE;
linphone_core_update_allocated_audio_bandwidth(lc);
allowed_bw=get_min_bandwidth(linphone_core_get_download_bandwidth(lc),
linphone_core_get_upload_bandwidth(lc));
if (allowed_bw==0) {
allowed_bw=-1;
video_bw=1500; /*around 1.5 Mbit/s*/
}else
video_bw=get_video_bandwidth(allowed_bw,lc->audio_bw);
switch (pt->type){
case PAYLOAD_AUDIO_CONTINUOUS:
case PAYLOAD_AUDIO_PACKETIZED:
codec_band=get_audio_payload_bandwidth(lc,pt);
ret=bandwidth_is_greater(allowed_bw*1000,codec_band);
/*hack to avoid using uwb codecs when having low bitrate and video*/
if (bandwidth_is_greater(199,allowed_bw)){
if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
ret=FALSE;
}
}
//ms_message("Payload %s: %g",pt->mime_type,codec_band);
break;
case PAYLOAD_VIDEO:
if (video_bw>0){
pt->normal_bitrate=video_bw*1000;
ret=TRUE;
}
else ret=FALSE;
break;
}
return ret;
}
/* return TRUE if codec can be used with bandwidth, FALSE else*/
bool_t linphone_core_check_payload_type_usability(const LinphoneCore *lc, PayloadType *pt)
{
double codec_band;
double npacket;
double packet_size;
int bitrate;
int min_audio_bw=get_min_bandwidth(lc->dw_audio_bw,lc->up_audio_bw);
int min_video_bw=get_min_bandwidth(lc->dw_video_bw,lc->up_video_bw);
bool_t ret=FALSE;
switch (pt->type){
case PAYLOAD_AUDIO_CONTINUOUS:
case PAYLOAD_AUDIO_PACKETIZED:
if (strcmp(pt->mime_type,"speex")==0 && (pt->clock_rate==8000)){
/*speex can go down to 8kbit/s */
bitrate=8000;
}else bitrate=pt->normal_bitrate;
/* very approximative estimation... revisit*/
npacket=50;
packet_size=(double)(bitrate/(50*8))+UDP_HDR_SZ+RTP_HDR_SZ+IP4_HDR_SZ;
codec_band=packet_size*8.0*npacket;
ret=bandwidth_is_greater(min_audio_bw*1000,codec_band);
//ms_message("Payload %s: %g",pt->mime_type,codec_band);
break;
case PAYLOAD_VIDEO:
if (min_video_bw!=0) {/* infinite (-1) or strictly positive*/
if (strcmp(pt->mime_type,"H263-1998")==0){
payload_type_set_recv_fmtp(pt,"CIF=1;QCIF=1");
}
/*let the video use all the bandwidth minus the maximum bandwidth used by audio */
if (min_video_bw>0)
pt->normal_bitrate=min_video_bw*1000;
else
pt->normal_bitrate=512000;
ret=TRUE;
}
else ret=FALSE;
break;
}
/*if (!ret) ms_warning("Payload %s is not usable with your internet connection.",pt->mime_type);*/
return ret;
}
