/**
* get_telephone_sound_codec:
* @codecs: a #GList of #FsCodec
*
* Find the first occurence of PCMA or PCMU codecs
*
* Returns: The #FsCodec of type PCMA/U from the list or %NULL
*/
static FsCodec *
get_pcm_law_sound_codec (GList *codecs,
gchar **encoder_name,
gchar **payloader_name)
{
CodecAssociation *ca = NULL;
ca = lookup_codec_association_custom (codecs, _is_law_codec, NULL);
if (!ca)
return NULL;
if (ca->codec->id == 0)
{
if (encoder_name)
*encoder_name = "mulawenc";
if (payloader_name)
*payloader_name = "rtppcmupay";
}
else if (ca->codec->id == 8)
{
if (encoder_name)
*encoder_name = "alawenc";
if (payloader_name)
*payloader_name = "rtppcmapay";
}
return ca->codec;
}
/**
* fs_rtp_dtmf_event_source_get_codec:
* @negotiated_codec_associations: a #GList of currently negotiated
* #CodecAssociation
* @selected_codec: The current #FsCodec
*
* Find the telephone-event codec with the proper clock rate in the list
*
* Returns: The #FsCodec of type "telephone-event" with the requested clock-rate
* from the list, or %NULL
*/
static FsCodec *
fs_rtp_dtmf_event_source_get_codec (FsRtpSpecialSourceClass *klass,
GList *negotiated_codec_associations, FsCodec *selected_codec)
{
CodecAssociation *ca = NULL;
if (selected_codec->media_type != FS_MEDIA_TYPE_AUDIO)
return NULL;
ca = lookup_codec_association_custom (negotiated_codec_associations,
_is_telephony_codec, GUINT_TO_POINTER (selected_codec->clock_rate));
if (ca)
return ca->send_codec;
else
return NULL;
}
static GList *
fs_rtp_dtmf_event_source_negotiation_filter (FsRtpSpecialSourceClass *klass,
GList *codec_associations)
{
GList *tmp;
for (tmp = codec_associations; tmp; tmp = g_list_next (tmp))
{
CodecAssociation *ca = tmp->data;
/* Ignore disabled or non telephone-event codecs*/
if (ca->disable || ca->reserved || ca->recv_only ||
g_ascii_strcasecmp (ca->codec->encoding_name, "telephone-event"))
continue;
/* Lets disable telephone-event codecs where we don't find */
if (!lookup_codec_association_custom (codec_associations, has_rate,
GUINT_TO_POINTER (ca->codec->clock_rate)))
ca->disable = TRUE;
}
return codec_associations;
}
