dvb/si: Add support for descriptor 0x5d (Multilingual service name).

README

@@ -126,6 +126,7 @@ Supported DVB descriptors
  * Descriptor 0x5a: Terrestrial delivery system descriptor
  * Descriptor 0x5b: Multilingual network name descriptor
  * Descriptor 0x5c: Multilingual bouquet name descriptor
+ * Descriptor 0x5d: Multilingual service name descriptor
  * Descriptor 0x5f: Private data specifier descriptor
  * Descriptor 0x6a: AC-3 descriptor [p]
 

TODO

@@ -14,7 +14,6 @@ so if you like something just do it and send a patch.
   - Descriptor 0x6a: AC-3 descriptor
 
 - Add support (parser, generator, example) for these DVB descriptors:
-  - Descriptor 0x5d: multilingual_service_name_descriptor
   - Descriptor 0x5e: multilingual_component_descriptor
   - Descriptor 0x60: service_move_descriptor
   - Descriptor 0x61: short_smoothing_buffer_descriptor

dvb/si/desc_5d.h

+/*****************************************************************************
+ * desc_5d.h: ETSI EN 300 468 Descriptor 0x5d: Multilingual service name
+ *****************************************************************************
+ * Copyright (C) 2009-2010 VideoLAN
+ *
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ *          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_5D_H__
+#define __BITSTREAM_DVB_DESC_5D_H__
+
+#include <bitstream/common.h>
+#include <bitstream/mpeg/psi/descriptors.h>
+#include <bitstream/mpeg/psi/desc_0a.h>
+#include <bitstream/dvb/si/strings.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*****************************************************************************
+ * Descriptor 0x5d: Multilingual service name
+ *****************************************************************************/
+#define DESC5D_HEADER_SIZE      DESC_HEADER_SIZE
+#define DESC5D_DATA_SIZE        5
+
+static inline void desc5d_init(uint8_t *p_desc)
+{
+    desc_set_tag(p_desc, 0x5d);
+}
+
+#define desc5dn_set_code desc0an_set_code
+#define desc5dn_get_code desc0an_get_code
+
+static inline uint8_t desc5dn_get_provider_name_length(const uint8_t *p_desc_n)
+{
+    return p_desc_n[3];
+}
+
+static inline const uint8_t *desc5dn_get_provider_name(const uint8_t *p_desc_n, uint8_t *pi_length)
+{
+    *pi_length = desc5dn_get_provider_name_length(p_desc_n);
+    return p_desc_n + 4;
+}
+
+static inline void desc5dn_set_provider_name(uint8_t *p_desc_n, const uint8_t *p_network_name, uint8_t i_length)
+{
+    p_desc_n[3] = i_length;
+    memcpy(p_desc_n + 4, p_network_name, i_length);
+}
+
+static inline uint8_t desc5dn_get_service_name_length(const uint8_t *p_desc_n)
+{
+    return p_desc_n[4 + desc5dn_get_provider_name_length(p_desc_n)];
+}
+
+static inline const uint8_t *desc5dn_get_service_name(const uint8_t *p_desc_n, uint8_t *pi_length)
+{
+    *pi_length = desc5dn_get_service_name_length(p_desc_n);
+    return p_desc_n + 5 + desc5dn_get_provider_name_length(p_desc_n);
+}
+
+static inline void desc5dn_set_service_name(uint8_t *p_desc_n, const uint8_t *p_network_name, uint8_t i_length)
+{
+    p_desc_n[4 + desc5dn_get_provider_name_length(p_desc_n)] = i_length;
+    memcpy(p_desc_n + 5 + desc5dn_get_provider_name_length(p_desc_n),
+        p_network_name, i_length);
+}
+
+static inline uint8_t *desc5d_get_data(const uint8_t *p_desc, uint8_t n)
+{
+    const uint8_t *p_desc_n = p_desc + DESC5D_HEADER_SIZE;
+    uint8_t i_desc_size = desc_get_length(p_desc);
+
+    while (n) {
+        if (p_desc_n + DESC5D_DATA_SIZE - p_desc > i_desc_size)
+            return NULL;
+        p_desc_n += DESC5D_DATA_SIZE
+            + desc5dn_get_provider_name_length(p_desc_n)
+            + desc5dn_get_service_name_length(p_desc_n);
+        n--;
+    }
+    if (p_desc_n - p_desc > i_desc_size)
+        return NULL;
+    return (uint8_t *)p_desc_n;
+}
+
+static inline bool desc5d_validate(const uint8_t *p_desc)
+{
+    const uint8_t *p_desc_n = p_desc + DESC5D_HEADER_SIZE;
+    int i_desc_size = desc_get_length(p_desc);
+    while (i_desc_size > 0)
+    {
+        uint8_t i_data_sz = DESC5D_DATA_SIZE
+            + desc5dn_get_provider_name_length(p_desc_n)
+            + desc5dn_get_service_name_length(p_desc_n);
+        i_desc_size -= i_data_sz;
+        p_desc_n    += i_data_sz;
+    }
+    return i_desc_size == 0;
+}
+
+static inline void desc5d_print(const uint8_t *p_desc,
+                                f_print pf_print, void *print_opaque,
+                                f_iconv pf_iconv, void *iconv_opaque,
+                                print_type_t i_print_type)
+{
+    const uint8_t *p_desc_n;
+    uint8_t j = 0;
+
+    while ((p_desc_n = desc5d_get_data(p_desc, j++)) != NULL) {
+        uint8_t i_provider_name_length, i_service_name_length;
+        const uint8_t *p_provider_name = desc5dn_get_provider_name(p_desc_n, &i_provider_name_length);
+        const uint8_t *p_service_name  = desc5dn_get_service_name(p_desc_n, &i_service_name_length);
+        char *psz_provider_name = dvb_string_get(p_provider_name, i_provider_name_length, pf_iconv, iconv_opaque);
+        char *psz_service_name = dvb_string_get(p_service_name, i_service_name_length, pf_iconv, iconv_opaque);
+        switch (i_print_type) {
+        case PRINT_XML:
+            psz_provider_name = dvb_string_xml_escape(psz_provider_name);
+            pf_print(print_opaque,
+                     "<MULTILINGUAL_SERVICE_NAME_DESC code=\"%3.3s\" provider=\"%s\" service=\"%s\"/>",
+                     desc5dn_get_code(p_desc_n),
+                     psz_provider_name,
+                     psz_service_name
+                    );
+            break;
+        default:
+            pf_print(print_opaque,
+                     "    - desc 5d multilingual_service_name code=\"%3.3s\" provider=\"%s\" service=\"%s\"",
+                     desc5dn_get_code(p_desc_n),
+                     psz_provider_name,
+                     psz_service_name
+                    );
+        }
+        free(psz_provider_name);
+        free(psz_service_name);
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

dvb/si/descs_list.h

@@ -63,6 +63,7 @@
 #include <bitstream/dvb/si/desc_5a.h>
 #include <bitstream/dvb/si/desc_5b.h>
 #include <bitstream/dvb/si/desc_5c.h>
+#include <bitstream/dvb/si/desc_5d.h>
 #include <bitstream/dvb/si/desc_5f.h>
 #include <bitstream/dvb/si/desc_6a.h>
 #include <bitstream/dvb/si/desc_83p28.h>

examples/dvb_gen_si.c

@@ -937,7 +937,36 @@ static void build_desc5c(uint8_t *desc) {
     desc_set_length(desc, data_n - desc - DESC_HEADER_SIZE);
 }
 
-/* ---  Descriptor 0x5d: multilingual_service_name_descriptor */
+/* DVB  Descriptor 0x5d: Multilingual service name descriptor */
+static void build_desc5d(uint8_t *desc) {
+    char *provider_name = "M Provider";
+    char *service_name = "M Service";
+    uint8_t k = 0;
+    uint8_t *data_n;
+
+    desc5d_init(desc);
+    desc_set_length(desc, 255);
+
+    data_n = desc5d_get_data(desc, k++);
+    desc5dn_set_code(data_n, (uint8_t *)"eng");
+    desc5dn_set_provider_name(data_n, (uint8_t *)provider_name, strlen(provider_name));
+    desc5dn_set_service_name(data_n, (uint8_t *)service_name, strlen(service_name));
+
+    data_n = desc5d_get_data(desc, k++);
+    desc5dn_set_code(data_n, (uint8_t *)"fre");
+    desc5dn_set_provider_name(data_n, (uint8_t *)provider_name, strlen(provider_name));
+    desc5dn_set_service_name(data_n, (uint8_t *)service_name, strlen(service_name));
+
+    data_n = desc5d_get_data(desc, k++);
+    desc5dn_set_code(data_n, (uint8_t *)"bul");
+    desc5dn_set_provider_name(data_n, (uint8_t *)provider_name, strlen(provider_name));
+    desc5dn_set_service_name(data_n, (uint8_t *)service_name, strlen(service_name));
+
+
+    data_n = desc5d_get_data(desc, k);
+    desc_set_length(desc, data_n - desc - DESC_HEADER_SIZE);
+}
+
 /* ---  Descriptor 0x5e: multilingual_component_descriptor */
 /* DVB  Descriptor 0x5f: Private data specifier descriptor */
 static void build_desc5f(uint8_t *desc) {
@@ -1465,6 +1494,9 @@ static void generate_sdt(void) {
             desc = descs_get_desc(desc_loop, desc_counter++);
             build_desc57(desc);
 
+            desc = descs_get_desc(desc_loop, desc_counter++);
+            build_desc5d(desc);
+
             desc = descs_get_desc(desc_loop, desc_counter++);
             build_desc5f(desc);
 

examples/dvb_print_si.output.txt

@@ -88,6 +88,9 @@ new SDT actual tsid=10000 version=1 onid=40000
             - elementary_cell cell_id=7
             - elementary_cell cell_id=8
     - desc 57 telephone foreign_availability=1 connection_type=3 country_prefix=+ international_area_code=359 operator_code=2 national_area_code= core_number=9868620 phone=+35929868620
+    - desc 5d multilingual_service_name code="eng" provider="M Provider" service="M Service"
+    - desc 5d multilingual_service_name code="fre" provider="M Provider" service="M Service"
+    - desc 5d multilingual_service_name code="bul" provider="M Provider" service="M Service"
     - desc 5f private_data specifier=0xaabbccdd
   * service sid=20100 eit_schedule running=1
     - desc 48 service type=0x1 provider="Test Provider Name" service="Test Service Name"

examples/dvb_print_si.output.xml

@@ -140,6 +140,11 @@
 <DESC id="0x57" length="15" value="e3ad872b3335393239383638363230">
 <TELEPHONE_DESC foreign_availability="1" connection_type="3" country_prefix="+" international_area_code="359" operator_code="2" national_area_code="" core_number="9868620" full_telephone="+35929868620"/>
 </DESC>
+<DESC id="0x5d" length="72" value="656e670a4d2050726f7669646572094d20536572766963656672650a4d2050726f7669646572094d205365727669636562756c0a4d2050726f7669646572094d2053657276696365">
+<MULTILINGUAL_SERVICE_NAME_DESC code="eng" provider="M Provider" service="M Service"/>
+<MULTILINGUAL_SERVICE_NAME_DESC code="fre" provider="M Provider" service="M Service"/>
+<MULTILINGUAL_SERVICE_NAME_DESC code="bul" provider="M Provider" service="M Service"/>
+</DESC>
 <DESC id="0x5f" length="4" value="aabbccdd">
 <PRIVATE_DATA_SPECIFIER_DESC specifier="0xaabbccdd" />
 </DESC>

mpeg/psi/descs_print.h

@@ -158,6 +158,7 @@ static inline void descl_print(uint8_t *p_descl, uint16_t i_length,
         CASE_DESC(5a)
         CASE_DESC_ICONV(5b)
         CASE_DESC_ICONV(5c)
+        CASE_DESC_ICONV(5d)
         CASE_DESC(6a)
 
 #undef CASE_DESC