MT#57719 monologue_offer_answer: stop using call subscriptions

Stop using call subscription in the `monologue_offer_answer()`,
which is used here to update transcoding related attributes and
use media subscriptions model instead.

Change-Id: I27abfe23ed2f3f532c3899e5d483cb302e43a142

daemon/call.c

@@ -2795,9 +2795,6 @@ int monologue_offer_answer(struct call_monologue *monologues[2], GQueue *streams
 		return -1;
 	}
 
-	/* required for updating the transcoding attrs of subscriber */
-	struct call_subscription * cs = find_subscription(monologue, other_ml);
-
 	__call_monologue_init_from_flags(other_ml, flags);
 
 	if (flags && flags->exclude_recording) {
@@ -2807,9 +2804,6 @@ int monologue_offer_answer(struct call_monologue *monologues[2], GQueue *streams
 
 	__C_DBG("this="STR_FORMAT" other="STR_FORMAT, STR_FMT(&monologue->tag), STR_FMT(&other_ml->tag));
 
-	if (cs)
-		cs->attrs.transcoding = 0;
-
 	for (GList *sp_iter = streams->head; sp_iter; sp_iter = sp_iter->next) {
 		struct stream_params *sp = sp_iter->data;
 		__C_DBG("processing media stream #%u", sp->index);
@@ -2833,6 +2827,10 @@ int monologue_offer_answer(struct call_monologue *monologues[2], GQueue *streams
 			__subscribe_medias_both_ways(media, other_media);
 		}
 
+		struct media_subscription * ms = call_get_media_subscription(media->media_subscribers_ht, other_media);
+		if (ms)
+			ms->attrs.transcoding = 0;
+
 		__media_init_from_flags(other_media, media, sp, flags);
 
 		codecs_offer_answer(media, other_media, sp, flags);