FS-7500: Work in progress. Added codec config params that can be set from session and made vpx codec re-init on size change. Also add periodic key frame timer

src/switch_core_codec.c

@@ -646,6 +646,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_init_with_bitrate(switch_codec
 
 	memset(codec, 0, sizeof(*codec));
 
+	if (pool) {
+		codec->session = switch_core_memory_pool_get_data(pool, "__session");
+	}
+
 	if ((codec_interface = switch_loadable_module_get_codec_interface(codec_name)) == 0) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid codec %s!\n", codec_name);
 		return SWITCH_STATUS_GENERR;