dvb/si: Add support for descriptor 0x55 (Parental rating descriptor).

dvb/si/desc_55.h

+/*****************************************************************************
+ * desc_55.h: ETSI EN 300 468 Descriptor 0x55: Parental rating descriptor
+ *****************************************************************************
+ * Copyright (C) 2011 Unix Solutions Ltd.
+ *
+ * Authors: Georgi Chorbadzhiyski <georgi@unixsol.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *****************************************************************************/
+
+/*
+ * Normative references:
+ *  - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
+ */
+
+#ifndef __BITSTREAM_DVB_DESC_55_H__
+#define __BITSTREAM_DVB_DESC_55_H__
+
+#include <bitstream/common.h>
+#include <bitstream/mpeg/psi/descriptors.h>
+#include <bitstream/mpeg/psi/desc_0a.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*****************************************************************************
+ * Descriptor 0x55: Parental rating descriptor
+ *****************************************************************************/
+#define DESC55_HEADER_SIZE      DESC_HEADER_SIZE
+#define DESC55_RATING_SIZE      4
+
+static inline void desc55_init(uint8_t *p_desc)
+{
+    desc_set_tag(p_desc, 0x55);
+}
+
+#define desc55n_get_country_code desc0an_get_code
+#define desc55n_set_country_code desc0an_set_code
+
+static inline uint8_t *desc55_get_rating(uint8_t *p_desc, uint8_t n)
+{
+    uint8_t *p_desc_n = p_desc + DESC55_HEADER_SIZE + n * DESC55_RATING_SIZE;
+    if (p_desc_n + DESC55_RATING_SIZE - p_desc
+         > desc_get_length(p_desc) + DESC55_HEADER_SIZE)
+        return NULL;
+    return p_desc_n;
+}
+
+static inline uint8_t desc55n_get_rating(uint8_t *p_desc_n)
+{
+    return p_desc_n[3];
+}
+
+static inline void desc55n_set_rating(uint8_t *p_desc_n, uint8_t i_rating)
+{
+    p_desc_n[3] = i_rating;
+}
+
+static inline bool desc55_validate(const uint8_t *p_desc)
+{
+    return !(desc_get_length(p_desc) % DESC55_RATING_SIZE);
+}
+
+static inline void desc55_print(uint8_t *p_desc, f_print pf_print,
+                                void *opaque, print_type_t i_print_type)
+{
+    uint8_t j = 0;
+    uint8_t *p_desc_n;
+
+    while ((p_desc_n = desc55_get_rating(p_desc, j++)) != NULL) {
+        char rating_txt[16];
+        uint8_t rating = desc55n_get_rating(p_desc_n);
+        if (rating == 0)
+            sprintf(rating_txt, "%s", "undefined");
+        else if (rating >= 0x01 && rating <= 0x0f)
+            sprintf(rating_txt, "min %d years", rating + 3);
+        else
+            sprintf(rating_txt, "%s", "unknown");
+        switch (i_print_type) {
+        case PRINT_XML:
+            pf_print(opaque, "<PARENTAL_RATING_DESC country_code=\"%3.3s\" rating=\"%u\" rating_txt=\"%s\"/>",
+                     (char *)desc55n_get_country_code(p_desc_n),
+                     desc55n_get_rating(p_desc_n),
+                     rating_txt
+                    );
+            break;
+        default:
+            pf_print(opaque,"    - desc 55 parental_rating country_code=%3.3s rating=%u rating_txt=\"%s\"",
+                     (char *)desc55n_get_country_code(p_desc_n),
+                     desc55n_get_rating(p_desc_n),
+                     rating_txt
+                    );
+        }
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

dvb/si/descs_list.h

@@ -46,6 +46,7 @@
 #include <bitstream/dvb/si/desc_4e.h>
 #include <bitstream/dvb/si/desc_52.h>
 #include <bitstream/dvb/si/desc_54.h>
+#include <bitstream/dvb/si/desc_55.h>
 #include <bitstream/dvb/si/desc_56.h>
 #include <bitstream/dvb/si/desc_59.h>
 #include <bitstream/dvb/si/desc_5a.h>

mpeg/psi/descs_print.h

@@ -129,6 +129,7 @@ static inline void descl_print(uint8_t *p_descl, uint16_t i_length,
         CASE_DESC_ICONV(4e)
         CASE_DESC(52)
         CASE_DESC(54)
+        CASE_DESC(55)
         CASE_DESC(56)
         CASE_DESC(59)
         CASE_DESC(5a)