From f198d1a2c799c97fe1e4e92e110cc0782f6f7880 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Fri, 30 Sep 2016 17:10:43 +0200
Subject: Add some FIG0/6 structures and skeleton

---
 src/fig/FIG0.cpp      | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/fig/FIG0.h        | 28 +++++++++++++++++++++
 src/fig/FIG0structs.h | 19 ++++++++++++++
 3 files changed, 116 insertions(+)

(limited to 'src')

diff --git a/src/fig/FIG0.cpp b/src/fig/FIG0.cpp
index bb08fac..b560e4c 100644
--- a/src/fig/FIG0.cpp
+++ b/src/fig/FIG0.cpp
@@ -662,6 +662,75 @@ FillStatus FIG0_5::fill(uint8_t *buf, size_t max_size)
     return fs;
 }
 
+//=========== FIG 0/6 ===========
+
+FIG0_6::FIG0_6(FIGRuntimeInformation *rti) :
+    m_rti(rti),
+    m_initialised(false)
+{
+}
+
+FillStatus FIG0_6::fill(uint8_t *buf, size_t max_size)
+{
+    FillStatus fs;
+    ssize_t remaining = max_size;
+    auto ensemble = m_rti->ensemble;
+
+    if (not m_initialised) {
+        linkageSetFIG0_6 = m_rti->ensemble->linkagesets.end();
+        m_initialised = true;
+    }
+
+    FIGtype0* fig0 = NULL;
+
+    for (; linkageSetFIG0_6 != ensemble->linkagesets.end();
+            ++linkageSetFIG0_6) {
+
+        const int required_size = 2;
+
+        if (fig0 == NULL) {
+            if (remaining < 2 + required_size) {
+                break;
+            }
+            fig0 = (FIGtype0*)buf;
+            fig0->FIGtypeNumber = 0;
+            fig0->Length = 1;
+            fig0->CN = 0;
+            fig0->OE = 0;
+            fig0->PD = 0;
+            fig0->Extension = 5;
+
+            buf += 2;
+            remaining -= 2;
+        }
+        else if (remaining < required_size) {
+            break;
+        }
+
+        FIGtype0_6 *fig0_6 = (FIGtype0_6*)buf;
+
+        fig0_6->IdListFlag = 1;
+        fig0_6->LA = (*linkageSetFIG0_6)->active;
+        fig0_6->SH = (*linkageSetFIG0_6)->hard;
+        fig0_6->ILS = (*linkageSetFIG0_6)->international;
+        fig0_6->LSN = (*linkageSetFIG0_6)->lsn;
+
+#error "handle FIG insertion and CEI properly"
+
+        fig0->Length += 2;
+        buf += 2;
+        remaining -= 2;
+    }
+
+    if (linkageSetFIG0_6 == ensemble->linkagesets.end()) {
+        linkageSetFIG0_6 = ensemble->linkagesets.begin();
+        fs.complete_fig_transmitted = true;
+    }
+
+    fs.num_bytes_written = max_size - remaining;
+    return fs;
+}
+
 //=========== FIG 0/8 ===========
 
 FIG0_8::FIG0_8(FIGRuntimeInformation *rti) :
diff --git a/src/fig/FIG0.h b/src/fig/FIG0.h
index 25aea15..5a8a69f 100644
--- a/src/fig/FIG0.h
+++ b/src/fig/FIG0.h
@@ -28,6 +28,7 @@
 #include <cstdint>
 #include <map>
 #include <set>
+#include <vector>
 
 #include "fig/FIG.h"
 
@@ -135,6 +136,33 @@ class FIG0_5 : public IFIG
         std::vector<DabComponent*>::iterator componentFIG0_5;
 };
 
+// FIG type 0/6
+// Service Linking
+//
+// This feature shall use the SIV signalling (see clause 5.2.2.1). The database
+// shall be divided by use of a database key.  Changes to the database shall be
+// signalled using the CEI. The first service in the list of services in each
+// part of the database, as divided by the database key, shall be a service
+// carried in the ensemble. This service is called the key service.
+//
+// The database key comprises the OE and P/D flags and the S/H, ILS, and LSN
+// fields.
+class FIG0_6 : public IFIG
+{
+    public:
+        FIG0_6(FIGRuntimeInformation* rti);
+        virtual FillStatus fill(uint8_t *buf, size_t max_size);
+        virtual FIG_rate repetition_rate(void) { return FIG_rate::E; }
+
+        virtual const int figtype(void) const { return 0; }
+        virtual const int figextension(void) const { return 6; }
+
+    private:
+        FIGRuntimeInformation *m_rti;
+        bool m_initialised;
+        std::list<std::shared_ptr<LinkageSet> >::iterator linkageSetFIG0_6;
+};
+
 // FIG type 0/8
 // The Extension 8 of FIG type 0 (FIG 0/8) provides information to link
 // together the service component description that is valid within the ensemble
diff --git a/src/fig/FIG0structs.h b/src/fig/FIG0structs.h
index a1e79d3..4b9b7e0 100644
--- a/src/fig/FIG0structs.h
+++ b/src/fig/FIG0structs.h
@@ -152,6 +152,25 @@ struct FIGtype0_5_short {
     uint8_t language;
 } PACKED;
 
+struct FIGtype0_6 {
+    uint16_t IdListFlag:1;
+    uint16_t LA:1; // Linkage actuator
+    uint16_t SH:1; // 0=Soft link / 1=Hard link
+    uint16_t ILS:1; // 0=national / 1=international
+    uint16_t LSN:12; // Linkage Set Number
+} PACKED;
+
+#define FIG0_6_IDLQ_DAB 0x0
+#define FIG0_6_IDLQ_RDS 0x1
+#define FIG0_6_IDLQ_DRM_AMSS 0x3
+
+struct FIGtype0_6_header {
+    uint8_t rfu:1; // must be 0
+    uint8_t IdLQ:2; // Identifier List Qualifier, see above defines
+    uint8_t rfa:1; // must be 0
+    uint8_t num_ids:4; // number of Ids to follow in the list
+} PACKED;
+
 struct FIGtype0_8_short {
     uint8_t SCIdS:4;
     uint8_t rfa_1:3;
-- 
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