dvb/si: Add support for descriptor 0x49 (Country availability descriptor).

README

@@ -106,6 +106,7 @@ Supported DVB descriptors
  * Descriptor 0x46: VBI teletext descriptor
  * Descriptor 0x47: Bouquet name descriptor
  * Descriptor 0x48: Service descriptor
+ * Descriptor 0x49: Country availability descriptor
  * Descriptor 0x4a: Linkage descriptor (partially implemented)
  * Descriptor 0x4d: Short event descriptor
  * Descriptor 0x4e: Extended event descriptor

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 0x49: Country availability descriptor
   - Descriptor 0x4b: NVOD_reference_descriptor
   - Descriptor 0x4c: time_shifted_service_descriptor
   - Descriptor 0x4f: time_shifted_event_descriptor

dvb/si/desc_49.h

+/*****************************************************************************
+ * desc_49.h: ETSI EN 300 468 Descriptor 0x49: Country availability descriptor
+ *****************************************************************************
+ * 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_49_H__
+#define __BITSTREAM_DVB_DESC_49_H__
+
+#include <bitstream/common.h>
+#include <bitstream/mpeg/psi/descriptors.h>
+#include <bitstream/mpeg/psi/desc_0a.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*****************************************************************************
+ * Descriptor 0x49: Country availability descriptor
+ *****************************************************************************/
+#define DESC49_HEADER_SIZE      (DESC_HEADER_SIZE + 1)
+#define DESC49_CODE_SIZE        3
+
+static inline void desc49_init(uint8_t *p_desc)
+{
+    desc_set_tag(p_desc, 0x49);
+    p_desc[2] = 0x7f;
+}
+
+static inline bool desc49_get_country_availability_flag(const uint8_t *p_desc)
+{
+    return (p_desc[2] & 0x80) == 0x80;
+}
+
+static inline void desc49_set_country_availability_flag(uint8_t *p_desc, bool b_available)
+{
+    p_desc[2] = b_available ? (p_desc[2] | 0x80) : (p_desc[2] &~ 0x80);
+}
+
+static inline uint8_t *desc49_get_code(uint8_t *p_desc, uint8_t n)
+{
+    uint8_t *p_desc_n = p_desc + DESC49_HEADER_SIZE + n * DESC49_CODE_SIZE;
+    if (p_desc_n + DESC49_CODE_SIZE - p_desc
+         > desc_get_length(p_desc) + DESC49_HEADER_SIZE)
+        return NULL;
+    return p_desc_n;
+}
+
+#define desc49n_set_code desc0an_set_code
+#define desc49n_get_code desc0an_get_code
+
+static inline bool desc49_validate(const uint8_t *p_desc)
+{
+    return ((desc_get_length(p_desc) - 1) % DESC49_CODE_SIZE) == 0;
+}
+
+static inline void desc49_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 = desc49_get_code(p_desc, j)) != NULL) {
+        j++;
+        switch (i_print_type) {
+        case PRINT_XML:
+            pf_print(opaque,
+                "<COUNTRY_AVAILABILITY_DESC available=\"%u\" country=\"%3.3s\"/>",
+                desc49_get_country_availability_flag(p_desc),
+                (const char *)desc49n_get_code(p_desc_n)
+            );
+            break;
+        default:
+            pf_print(opaque,
+                "    - desc 49 country_availability available=%u country=%3.3s",
+                desc49_get_country_availability_flag(p_desc),
+                (const char *)desc49n_get_code(p_desc_n)
+            );
+        }
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

dvb/si/descs_list.h

@@ -43,6 +43,7 @@
 #include <bitstream/dvb/si/desc_46.h>
 #include <bitstream/dvb/si/desc_47.h>
 #include <bitstream/dvb/si/desc_48.h>
+#include <bitstream/dvb/si/desc_49.h>
 #include <bitstream/dvb/si/desc_4a.h>
 #include <bitstream/dvb/si/desc_4d.h>
 #include <bitstream/dvb/si/desc_4e.h>

examples/dvb_gen_si.c

@@ -513,7 +513,29 @@ static void build_desc48(uint8_t *desc) {
     desc48_set_length(desc);
 }
 
-/* ---  Descriptor 0x49: Country availability descriptor */
+/* DVB  Descriptor 0x49: Country availability descriptor */
+static void build_desc49(uint8_t *desc, bool b_available) {
+    uint8_t k = 0;
+    uint8_t *code_n;
+
+    desc49_init(desc);
+    desc49_set_country_availability_flag(desc, b_available);
+
+    desc_set_length(desc, 255);
+
+    code_n = desc49_get_code(desc, k++);
+    desc49n_set_code(code_n, (uint8_t *)"GBR");
+
+    code_n = desc49_get_code(desc, k++);
+    desc49n_set_code(code_n, (uint8_t *)"FRA");
+
+    code_n = desc49_get_code(desc, k++);
+    desc49n_set_code(code_n, (uint8_t *)"BUL");
+
+    code_n = desc49_get_code(desc, k);
+    desc_set_length(desc, code_n - desc - DESC_HEADER_SIZE);
+}
+
 /* DVB  Descriptor 0x4a: Linkage descriptor (partially implemented) */
 /* ---  Descriptor 0x4b: NVOD_reference_descriptor */
 /* ---  Descriptor 0x4c: time_shifted_service_descriptor */
@@ -1231,6 +1253,9 @@ static void generate_sdt(void) {
             desc = descs_get_desc(desc_loop, desc_counter++);
             build_desc48(desc);
 
+            desc = descs_get_desc(desc_loop, desc_counter++);
+            build_desc49(desc, true);
+
             desc = descs_get_desc(desc_loop, desc_counter++);
             build_desc5f(desc);
 
@@ -1254,6 +1279,9 @@ static void generate_sdt(void) {
             desc = descs_get_desc(desc_loop, desc_counter++);
             build_desc48(desc);
 
+            desc = descs_get_desc(desc_loop, desc_counter++);
+            build_desc49(desc, false);
+
             desc = descs_get_desc(desc_loop, desc_counter++);
             build_desc5f(desc);
 

mpeg/psi/descs_print.h

@@ -138,6 +138,7 @@ static inline void descl_print(uint8_t *p_descl, uint16_t i_length,
         CASE_DESC(46)
         CASE_DESC_ICONV(47)
         CASE_DESC_ICONV(48)
+        CASE_DESC(49)
         CASE_DESC(4a)
         CASE_DESC_ICONV(4d)
         CASE_DESC_ICONV(4e)