From fec3451cd02dea596c141309e576b166834a3778 Mon Sep 17 00:00:00 2001
From: eladyn <eladyn@protonmail.com>
Date: Sun, 29 May 2022 17:32:55 +0200
Subject: [PATCH] sip: origin: Honor preferred codecs for incoming calls

This enables proper negotiation of the codec when answering calls, which
previously also responded with codecs that were not part of the users
preferred ones.

Fixes: #413
---
 plugins/sip/calls-sip-origin.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/plugins/sip/calls-sip-origin.c b/plugins/sip/calls-sip-origin.c
index 9ac719c..d475a73 100644
--- a/plugins/sip/calls-sip-origin.c
+++ b/plugins/sip/calls-sip-origin.c
@@ -590,9 +590,21 @@ sip_i_state (int              status,
   }
 
   if (r_sdp) {
-    g_autoptr (GList) codecs =
+    g_autoptr (GList) remote_codecs =
       calls_sip_media_manager_get_codecs_from_sdp (origin->media_manager,
                                                    r_sdp->sdp_media);
+    GList *preferred_codecs = calls_sip_media_manager_codec_candidates (origin->media_manager);
+    g_autoptr (GList) codecs = NULL;
+    GList *node;
+
+    for (node = remote_codecs; node != NULL; node = node->next) {
+      MediaCodecInfo *codec = node->data;
+      if (g_list_find (preferred_codecs, codec)) {
+        g_debug ("Found common codec: %s", codec->name);
+        codecs = g_list_append (codecs, codec);
+      }
+    }
+
     g_autoptr (CallsSdpCryptoContext) ctx = NULL;
     const char *session_ip = NULL;
     const char *media_ip = NULL;