FS-6209 --resolve

conf/vanilla/autoload_configs/opus.conf.xml

+<configuration name="opus.conf">
+    <settings>
+        <param name="use_vbr" value="1"/>
+        <param name="complexity" value="10"/>
+    </settings>
+</configuration>

src/mod/codecs/mod_opus/mod_opus.c

@@ -24,6 +24,7 @@
  * Contributor(s):
  *
  * Brian K. West <brian@freeswitch.org>
+ * Noel Morgan <noel@vwci.com>
  *
  * mod_opus.c -- The OPUS ultra-low delay audio codec (http://www.opus-codec.org/)
  *
@@ -72,6 +73,13 @@ struct opus_context {
 	int frame_size;
 };
 
+struct {
+    int use_vbr;
+    int complexity;
+    switch_mutex_t *mutex;
+} opus_prefs;
+
+
 static switch_status_t switch_opus_fmtp_parse(const char *fmtp, switch_codec_fmtp_t *codec_fmtp)
 {
 	if (codec_fmtp) {
@@ -253,8 +261,8 @@ static switch_status_t switch_opus_init(switch_codec_t *codec, switch_codec_flag
 	if (encoding) {
 		/* come up with a way to specify these */
 		int bitrate_bps = OPUS_AUTO;
-		int use_vbr = 1;
-		int complexity = 10;
+		int use_vbr = opus_prefs.use_vbr;
+		int complexity = opus_prefs.complexity;
 		int err;
 		int samplerate = opus_codec_settings.samplerate ? opus_codec_settings.samplerate : codec->implementation->actual_samples_per_second;
         
@@ -385,6 +393,37 @@ static switch_status_t switch_opus_decode(switch_codec_t *codec,
 	return SWITCH_STATUS_SUCCESS;
 }
 
+static switch_status_t opus_load_config(switch_bool_t reload)
+{
+	char *cf = "opus.conf";
+	switch_xml_t cfg, xml = NULL, param, settings;
+	switch_status_t status = SWITCH_STATUS_SUCCESS;
+    
+	if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Opening of %s failed\n", cf);
+		status = SWITCH_STATUS_TERM;
+	}
+    
+	if ((settings = switch_xml_child(cfg, "settings"))) {
+		for (param = switch_xml_child(settings, "param"); param; param = param->next) {
+			char *key = (char *) switch_xml_attr_soft(param, "name");
+			char *val = (char *) switch_xml_attr_soft(param, "value");
+			
+			if (!strcasecmp(key, "use_vbr") && !zstr(val)) {
+				opus_prefs.use_vbr = atoi(val);
+			} else if (!strcasecmp(key, "complexity")) {
+				opus_prefs.complexity = atoi(val);
+			}
+		}
+	}
+    
+    if (xml) {
+        switch_xml_free(xml);
+    }
+    
+    return status;
+}
+
 SWITCH_MODULE_LOAD_FUNCTION(mod_opus_load)
 {
 	switch_codec_interface_t *codec_interface;
@@ -396,6 +435,11 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_opus_load)
 	int bits = 0;
 	char *dft_fmtp = NULL;
 	opus_codec_settings_t settings = { 0 };
+    switch_status_t status = SWITCH_FALSE;
+    
+	if ((status = opus_load_config(SWITCH_FALSE)) != SWITCH_STATUS_SUCCESS) {
+		return status;
+	}
     
 	/* connect my internal structure to the blank pointer passed to me */
 	*module_interface = switch_loadable_module_create_module_interface(pool, modname);