Log spandsp's fax debug output to the FAX logger level.

Review: https://reviewboard.asterisk.org/r/658



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@264953 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/res_fax.h

@@ -256,4 +256,15 @@ unsigned int ast_fax_maxrate(void);
 /*! \brief convert an ast_fax_state to a string */
 const char *ast_fax_state_to_str(enum ast_fax_state state);
 
+/*!
+ * \brief Log message at FAX or recommended level
+ *
+ * The first four parameters can be represented with Asterisk's
+ * LOG_* levels. In other words, this function may be called
+ * like
+ *
+ * ast_fax_log(LOG_DEBUG, msg);
+ */
+void ast_fax_log(int level, const char *file, const int line, const char *function, const char *msg);
+
 #endif

res/res_fax.c

@@ -101,6 +101,8 @@ struct ast_fax_debug_info {
 	struct ast_dsp *dsp;
 };
 
+static int fax_logger_level = -1;
+
 /*! \brief maximum buckets for res_fax ao2 containers */
 #define FAX_MAXBUCKETS 10
 
@@ -448,6 +450,15 @@ const char *ast_fax_state_to_str(enum ast_fax_state state)
 	}
 }
 
+void ast_fax_log(int level, const char *file, const int line, const char *function, const char *msg)
+{
+	if (fax_logger_level != -1) {
+		ast_log_dynamic_level(fax_logger_level, "%s", msg);
+	} else {
+		ast_log(level, file, line, function, "%s", msg);
+	}
+}
+
 /*! \brief convert a rate string to a rate */
 static int fax_rate_str_to_int(const char *ratestr)
 {
@@ -2195,6 +2206,10 @@ static int unload_module(void)
 		ast_log(LOG_WARNING, "failed to unregister '%s'\n", app_receivefax);
 	}
 
+	if (fax_logger_level != -1) {
+		ast_logger_unregister_level("FAX");
+	}
+
 	ao2_ref(faxregistry.container, -1);
 
 	return 0;
@@ -2231,6 +2246,7 @@ static int load_module(void)
 	}
 	ast_cli_register_multiple(fax_cli, ARRAY_LEN(fax_cli));
 	res = ast_custom_function_register(&acf_faxopt);	
+	fax_logger_level = ast_logger_register_level("FAX");
 
 	return res;
 }

res/res_fax.exports.in

@@ -6,6 +6,7 @@
 		LINKER_SYMBOL_PREFIXast_fax_minrate;
 		LINKER_SYMBOL_PREFIXast_fax_maxrate;
 		LINKER_SYMBOL_PREFIXast_fax_state_to_str;
+		LINKER_SYMBOL_PREFIXast_fax_log;
 	local:
 		*;
 };

res/res_fax_spandsp.c

@@ -366,7 +366,7 @@ static void spandsp_log(int level, const char *msg)
 	} else if (level == SPAN_LOG_WARNING) {
 		ast_log(LOG_WARNING, "%s", msg);
 	} else {
-		ast_log(LOG_DEBUG, "%s", msg);
+		ast_fax_log(LOG_DEBUG, msg);
 	}
 }