libdvbv5: Add documentation for CA descriptor

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

2 files changed, 68 insertions, 3 deletions

diff --git a/doxygen_libdvbv5.cfg b/doxygen_libdvbv5.cfg
index aebfe04b..7af77c97 100644
--- a/doxygen_libdvbv5.cfg
+++ b/doxygen_libdvbv5.cfg
@@ -768,6 +768,7 @@ INPUT                  = $(SRCDIR)/doc/libdvbv5-index.doc \
 			 $(SRCDIR)/lib/include/libdvbv5/mpeg_pes.h \
 			 $(SRCDIR)/lib/include/libdvbv5/mpeg_ts.h \
 			 $(SRCDIR)/lib/include/libdvbv5/desc_atsc_service_location.h \
+			 $(SRCDIR)/lib/include/libdvbv5/desc_ca.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_ca.h b/lib/include/libdvbv5/desc_ca.h
index 21ae525b..653da0c2 100644
--- a/lib/include/libdvbv5/desc_ca.h
+++ b/lib/include/libdvbv5/desc_ca.h
@@ -19,11 +19,41 @@
  * Described at ETSI EN 300 468 V1.11.1 (2010-04)
  */
 
+/**
+ * @file desc_ca.h
+ * @ingroup descriptors
+ * @brief Provides the descriptors for Conditional Access
+ * @copyright GNU General Public License version 2 (GPLv2)
+ * @author Andre Roth
+ *
+ * @par Relevant specs
+ * The descriptor described herein is defined at:
+ * - ETSI EN 300 468 V1.11.1 (2010-04)
+ *
+ * @see http://www.etherguidesystems.com/help/sdos/mpeg/semantics/mpeg-2/descriptors/CA_descriptor.aspx
+ *
+ * @par Bug Report
+ * Please submit bug reports and patches to linux-media@vger.kernel.org
+ */
+
 #ifndef _CA_H
 #define _CA_H
 
 #include <libdvbv5/descriptors.h>
 
+/**
+ * @struct dvb_desc_ca
+ * @ingroup descriptors
+ * @brief Contains the private data for Conditional Access
+ *
+ * @param type			descriptor tag
+ * @param length		descriptor length
+ * @param next			pointer to struct dvb_desc
+ * @param ca_id			Conditional Access ID
+ * @param ca_pid		Conditional Access ID
+ * @param privdata		pointer to private data buffer
+ * @param privdata_len		length of the private data
+ */
 struct dvb_desc_ca {
 	uint8_t type;
 	uint8_t length;
@@ -44,16 +74,50 @@ struct dvb_desc_ca {
 
 struct dvb_v5_fe_parms;
 
+/** @brief initial descriptor field at dvb_desc_ca struct */
 #define dvb_desc_ca_field_first ca_id
+/** @brief last descriptor field at dvb_desc_ca struct */
 #define dvb_desc_ca_field_last  privdata
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-int dvb_desc_ca_init (struct dvb_v5_fe_parms *parms, const uint8_t *buf, struct dvb_desc *desc);
-void dvb_desc_ca_print(struct dvb_v5_fe_parms *parms, const struct dvb_desc *desc);
-void dvb_desc_ca_free (struct dvb_desc *desc);
+/**
+ * @brief Initializes and parses the CA 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 allocates a the descriptor and fills the fields inside
+ * the struct. It also makes sure that all fields will follow the CPU
+ * endianness. Due to that, the content of the buffer may change.
+ *
+ * @return On success, it returns the size of the allocated struct.
+ *	   A negative value indicates an error.
+ */
+int dvb_desc_ca_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
+		      struct dvb_desc *desc);
+
+/**
+ * @brief Prints the content of the CA 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_ca_print(struct dvb_v5_fe_parms *parms,
+		       const struct dvb_desc *desc);
+
+/**
+ * @brief Frees all data allocated by the CA descriptor
+ * @ingroup descriptors
+ *
+ * @param desc pointer to struct dvb_desc to be freed
+ */
+void dvb_desc_ca_free(struct dvb_desc *desc);
 
 #ifdef __cplusplus
 }