Add initial implementation for FIG0/24

1 files changed, 177 insertions, 0 deletions

diff --git a/src/fig/FIG0_24.cpp b/src/fig/FIG0_24.cpp
new file mode 100644
index 0000000..af3f043
--- /dev/null
+++ b/src/fig/FIG0_24.cpp
@@ -0,0 +1,177 @@
+/*
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+   2011, 2012 Her Majesty the Queen in Right of Canada (Communications
+   Research Center Canada)
+
+   Copyright (C) 2017
+   Matthias P. Braendli, matthias.braendli@mpb.li
+   */
+/*
+   This file is part of ODR-DabMux.
+
+   ODR-DabMux is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the
+   License, or (at your option) any later version.
+
+   ODR-DabMux is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with ODR-DabMux.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "fig/FIG0structs.h"
+#include "fig/FIG0_24.h"
+#include "utils.h"
+
+#warning "fig0/24 rate"
+
+namespace FIC {
+
+struct FIGtype0_24_audioservice {
+    uint16_t SId;
+    uint8_t Length:4;
+    uint8_t CAId:3;
+    uint8_t rfa:1;
+} PACKED;
+
+struct FIGtype0_24_dataservice {
+    uint32_t SId;
+    uint8_t Length:4;
+    uint8_t CAId:3;
+    uint8_t rfa:1;
+} PACKED;
+
+
+FIG0_24::FIG0_24(FIGRuntimeInformation *rti) :
+    m_rti(rti),
+    m_initialised(false),
+    m_inserting_audio_not_data(false)
+{
+}
+
+FillStatus FIG0_24::fill(uint8_t *buf, size_t max_size)
+{
+#define FIG0_24_TRACE debug
+    using namespace std;
+
+    FillStatus fs;
+    FIGtype0* fig0 = nullptr;
+    ssize_t remaining = max_size;
+
+    const auto ensemble = m_rti->ensemble;
+
+    etiLog.level(FIG0_24_TRACE) << "FIG0_24::fill init " << (m_initialised ? 1 : 0) <<
+        " ********************************";
+
+    if (not m_initialised) {
+        serviceFIG0_24 = ensemble->services.begin();
+        m_initialised = true;
+    }
+
+    const auto last_service = ensemble->services.end();
+
+    // Rotate through the subchannels until there is no more
+    // space
+    for (; serviceFIG0_24 != last_service; ++serviceFIG0_24) {
+        const auto type = (*serviceFIG0_24)->getType(ensemble);
+        const auto isProgramme = (*serviceFIG0_24)->isProgramme(ensemble);
+
+        etiLog.log(FIG0_24_TRACE, "FIG0_24::fill  loop SId=%04x %s/%s",
+                (*serviceFIG0_24)->id,
+                m_inserting_audio_not_data ? "AUDIO" : "DATA",
+                type == subchannel_type_t::Audio ? "Audio" :
+                type == subchannel_type_t::Packet ? "Packet" :
+                type == subchannel_type_t::DataDmb ? "DataDmb" :
+                type == subchannel_type_t::Fidc ? "Fidc" : "?");
+
+        // Skip services that are not in other ensembles
+        if ((*serviceFIG0_24)->other_ensembles.empty()) {
+            continue;
+        }
+
+        const ssize_t required_size =
+            (isProgramme ? 2 : 4) + 1 +
+            (*serviceFIG0_24)->other_ensembles.size() * 2;
+
+
+        if (fig0 == nullptr) {
+            etiLog.level(FIG0_24_TRACE) << "FIG0_24::fill  header";
+            if (remaining < 2 + required_size) {
+                etiLog.level(FIG0_24_TRACE) << "FIG0_24::fill  header no place" <<
+                    " rem=" << remaining << " req=" << 2 + required_size;
+                break;
+            }
+            fig0 = (FIGtype0*)buf;
+
+            fig0->FIGtypeNumber = 0;
+            fig0->Length = 1;
+            fig0->CN = 0;
+            fig0->OE = 0;
+            fig0->PD = isProgramme ? 0 : 1;
+            fig0->Extension = 2;
+            buf += 2;
+            remaining -= 2;
+        }
+        else if (remaining < required_size) {
+            etiLog.level(FIG0_24_TRACE) << "FIG0_24::fill  no place" <<
+                " rem=" << remaining << " req=" << required_size;
+            break;
+        }
+
+        if (type == subchannel_type_t::Audio) {
+            auto fig0_2serviceAudio = (FIGtype0_24_audioservice*)buf;
+
+            fig0_2serviceAudio->SId = htons((*serviceFIG0_24)->id);
+            fig0_2serviceAudio->rfa = 0;
+            fig0_2serviceAudio->CAId = 0;
+            fig0_2serviceAudio->Length = (*serviceFIG0_24)->other_ensembles.size();
+            buf += 3;
+            fig0->Length += 3;
+            remaining -= 3;
+
+            etiLog.log(FIG0_24_TRACE, "FIG0_24::fill  audio SId=%04x",
+               (*serviceFIG0_24)->id);
+        }
+        else {
+            auto fig0_2serviceData = (FIGtype0_24_dataservice*)buf;
+
+            fig0_2serviceData->SId = htonl((*serviceFIG0_24)->id);
+            fig0_2serviceData->rfa = 0;
+            fig0_2serviceData->CAId = 0;
+            fig0_2serviceData->Length = (*serviceFIG0_24)->other_ensembles.size();
+            buf += 4;
+            fig0->Length += 4;
+            remaining -= 4;
+
+            etiLog.log(FIG0_24_TRACE, "FIG0_24::fill  data SId=%04x",
+               (*serviceFIG0_24)->id);
+        }
+
+        for (const uint16_t oe : (*serviceFIG0_24)->other_ensembles) {
+            buf[0] = oe >> 8;
+            buf[1] = oe & 0xFF;
+
+            buf += 2;
+            fig0->Length += 2;
+            remaining -= 2;
+        }
+    }
+
+    if (serviceFIG0_24 == last_service) {
+        etiLog.log(FIG0_24_TRACE, "FIG0_24::loop reached last");
+        fs.complete_fig_transmitted = true;
+        m_initialised = false;
+    }
+
+    etiLog.log(FIG0_24_TRACE, "FIG0_24::loop end complete=%d",
+            fs.complete_fig_transmitted ? 1 : 0);
+
+    fs.num_bytes_written = max_size - remaining;
+    return fs;
+}
+
+}