libdvbv5: add documentation for the language descriptor

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

2 files changed, 59 insertions, 3 deletions

diff --git a/doxygen_libdvbv5.cfg b/doxygen_libdvbv5.cfg
index db108883..dd8ba343 100644
--- a/doxygen_libdvbv5.cfg
+++ b/doxygen_libdvbv5.cfg
@@ -777,6 +777,7 @@ INPUT                  = $(SRCDIR)/doc/libdvbv5-index.doc \
 			 $(SRCDIR)/lib/include/libdvbv5/desc_frequency_list.h \
 			 $(SRCDIR)/lib/include/libdvbv5/desc_hierarchy.h \
 			 $(SRCDIR)/lib/include/libdvbv5/desc_isdbt_delivery.h \
+			 $(SRCDIR)/lib/include/libdvbv5/desc_language.h \
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/lib/include/libdvbv5/desc_language.h b/lib/include/libdvbv5/desc_language.h
index b448a731..f333cfaa 100644
--- a/lib/include/libdvbv5/desc_language.h
+++ b/lib/include/libdvbv5/desc_language.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011-2012 - Mauro Carvalho Chehab
+ * Copyright (c) 2011-2014 - Mauro Carvalho Chehab
  * Copyright (c) 2012 - Andre Roth <neolynx@gmail.com>
  *
  * This program is free software; you can redistribute it and/or
@@ -19,11 +19,40 @@
  *
  */
 
+/**
+ * @file desc_language.h
+ * @ingroup descriptors
+ * @brief Provides the descriptors for the ISO639 language descriptor
+ * @copyright GNU General Public License version 2 (GPLv2)
+ * @author Mauro Carvalho Chehab
+ * @author Andre Roth
+ *
+ * @par Relevant specs
+ * The descriptor described herein is defined at:
+ * - ISO/IEC 13818-1
+ *
+ * @par Bug Report
+ * Please submit bug reports and patches to linux-media@vger.kernel.org
+ */
+
 #ifndef _DESC_LANGUAGE_H
 #define _DESC_LANGUAGE_H
 
 #include <libdvbv5/descriptors.h>
 
+/**
+ * @struct dvb_desc_language
+ * @ingroup descriptors
+ * @brief Structure containing the ISO639 language descriptor
+ *
+ * @param type			descriptor tag
+ * @param length		descriptor length
+ * @param next			pointer to struct dvb_desc
+ * @param language		ISO639 language string
+ * @param audio_type		audio type: 0 = undefined, 1 = clean effects,
+ *				2 = hearing impaired, 3 = visual impired
+ *				comentary, other values are reserved.
+ */
 struct dvb_desc_language {
 	uint8_t type;
 	uint8_t length;
@@ -39,8 +68,34 @@ struct dvb_v5_fe_parms;
 extern "C" {
 #endif
 
-int dvb_desc_language_init (struct dvb_v5_fe_parms *parms, const uint8_t *buf, struct dvb_desc *desc);
-void dvb_desc_language_print(struct dvb_v5_fe_parms *parms, const struct dvb_desc *desc);
+/**
+ * @brief Initializes and parses the language descriptor
+ * @ingroup descriptors
+ *
+ * @param parms	struct dvb_v5_fe_parms pointer to the opened device
+ * @param buf	buffer containing the descriptor's raw data
+ * @param desc	pointer to struct dvb_desc to be allocated and filled
+ *
+ * This function initializes and makes sure that all fields will follow the CPU
+ * endianness. Due to that, the content of the buffer may change.
+ *
+ * Currently, no memory is allocated internally.
+ *
+ * @return On success, it returns the size of the allocated struct.
+ *	   A negative value indicates an error.
+ */
+int dvb_desc_language_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
+			   struct dvb_desc *desc);
+
+/**
+ * @brief Prints the content of the language descriptor
+ * @ingroup descriptors
+ *
+ * @param parms	struct dvb_v5_fe_parms pointer to the opened device
+ * @param desc	pointer to struct dvb_desc
+ */
+void dvb_desc_language_print(struct dvb_v5_fe_parms *parms,
+			     const struct dvb_desc *desc);
 
 #ifdef __cplusplus
 }