Improve dexter clock handling

13 files changed, 64 insertions, 63 deletions

diff --git a/src/output/BladeRF.cpp b/src/output/BladeRF.cpp
index 2dd7176..c16b64d 100755
--- a/src/output/BladeRF.cpp
+++ b/src/output/BladeRF.cpp
@@ -273,7 +273,7 @@ size_t BladeRF::receive_frame(
     return 0;
 }
 
-bool BladeRF::is_clk_source_ok() const
+bool BladeRF::is_clk_source_ok()
 {
     // TODO
     return true;
diff --git a/src/output/BladeRF.h b/src/output/BladeRF.h
index eb3e58b..fa3419e 100755
--- a/src/output/BladeRF.h
+++ b/src/output/BladeRF.h
@@ -87,7 +87,7 @@ class BladeRF : public Output::SDRDevice
                double timeout_secs) override;
 
        // Return true if GPS and reference clock inputs are ok
-       virtual bool is_clk_source_ok(void) const override;
+       virtual bool is_clk_source_ok(void) override;
        virtual const char* device_name(void) const override;
 
        virtual std::optional<double> get_temperature(void) const override;
diff --git a/src/output/Dexter.cpp b/src/output/Dexter.cpp
index 59baf7e..25de030 100644
--- a/src/output/Dexter.cpp
+++ b/src/output/Dexter.cpp
@@ -277,7 +277,9 @@ void Dexter::handle_hw_time()
                     m_utc_seconds_at_startup = time_now.tv_sec;
                     m_clock_count_at_startup = pps_clks2;
                     m_holdover_since = chrono::steady_clock::time_point::min();
+                    m_holdover_since_t = 0;
                     m_clock_state = DexterClockState::Normal;
+                    etiLog.level(debug) << "Dexter: switch clock state Startup -> Normal";
                 }
             }
             break;
@@ -291,20 +293,31 @@ void Dexter::handle_hw_time()
 
                 if (pps_loss_of_signal == 1) {
                     m_holdover_since = chrono::steady_clock::now();
+                    m_holdover_since_t = chrono::system_clock::to_time_t(chrono::system_clock::now());
                     m_clock_state = DexterClockState::Holdover;
+                    etiLog.level(debug) << "Dexter: switch clock state Normal -> Holdover";
                 }
             }
             break;
         case DexterClockState::Holdover:
             {
                 using namespace chrono;
+
+                long long pps_loss_of_signal = 0;
+                if ((r = iio_device_attr_read_longlong(m_dexter_dsp_tx, "pps_loss_of_signal", &pps_loss_of_signal)) != 0) {
+                    etiLog.level(error) << "Failed to get dexter_dsp_tx.pps_loss_of_signal: " << get_iio_error(r);
+                    throw std::runtime_error("Dexter: Cannot read IIO attribute");
+                }
+
                 const duration<double> d = steady_clock::now() - m_holdover_since;
                 const auto max_holdover_duration = seconds(m_conf.maxGPSHoldoverTime);
-                if (d > max_holdover_duration) {
+                if (d > max_holdover_duration or pps_loss_of_signal == 0) {
                     m_clock_state = DexterClockState::Startup;
                     m_utc_seconds_at_startup = 0;
                     m_clock_count_at_startup = 0;
                     m_holdover_since = chrono::steady_clock::time_point::min();
+                    m_holdover_since_t = 0;
+                    etiLog.level(debug) << "Dexter: switch clock state Holdover -> Startup";
                 }
             }
             break;
@@ -383,6 +396,21 @@ double Dexter::get_bandwidth(void) const
     return 0;
 }
 
+template <typename T>
+static void attr_to_stat(
+        Dexter::run_statistics_t& rs, iio_device *dexter_dsp_tx,
+        const char* attr_name, const char* stat_name) {
+    long long attr_value = 0;
+    int r = 0;
+    if ((r = iio_device_attr_read_longlong(dexter_dsp_tx, attr_name, &attr_value)) == 0) {
+        rs[stat_name] = (T)attr_value;
+    }
+    else {
+        rs[stat_name] = (ssize_t)-1;
+        etiLog.level(error) << "Failed to get dexter_dsp_tx." << attr_name << ": " << get_iio_error(r);
+    }
+};
+
 SDRDevice::run_statistics_t Dexter::get_run_statistics(void) const
 {
     run_statistics_t rs;
@@ -393,24 +421,25 @@ SDRDevice::run_statistics_t Dexter::get_run_statistics(void) const
     rs["latepackets"] = num_late;
     rs["frames"] = num_frames_modulated;
 
-    auto attr_to_stat = [&](const char* attr_name, const char* stat_name) {
-        long long attr_value = 0;
-        int r = 0;
-        if ((r = iio_device_attr_read_longlong(m_dexter_dsp_tx, attr_name, &attr_value)) == 0) {
-            rs[stat_name] = (size_t)attr_value;
-        }
-        else {
-            rs[stat_name] = (ssize_t)-1;
-            etiLog.level(error) << "Failed to get dexter_dsp_tx." << attr_name << ": " << get_iio_error(r);
-        }
-    };
+    attr_to_stat<size_t>(rs, m_dexter_dsp_tx, "clks", "clks");
+    attr_to_stat<size_t>(rs, m_dexter_dsp_tx, "stream0_fifo_not_empty_clks", "fifo_not_empty_clks");
+    attr_to_stat<size_t>(rs, m_dexter_dsp_tx, "gpsdo_locked", "gpsdo_locked");
+    attr_to_stat<ssize_t>(rs, m_dexter_dsp_tx, "pps_clk_error_hz", "pps_clk_error_hz");
+    attr_to_stat<size_t>(rs, m_dexter_dsp_tx, "pps_cnt", "pps_cnt");
+    attr_to_stat<size_t>(rs, m_dexter_dsp_tx, "pps_loss_of_signal", "pps_loss_of_signal");
+    attr_to_stat<size_t>(rs, m_dexter_dsp_tx, "dsp_version", "dsp_version");
 
-    attr_to_stat("clks", "clks");
-    attr_to_stat("stream0_fifo_not_empty_clks", "fifo_not_empty_clks");
-    attr_to_stat("gpsdo_locked", "gpsdo_locked");
-    attr_to_stat("pps_clk_error_hz", "pps_clk_error_hz");
-    attr_to_stat("pps_cnt", "pps_cnt");
-    attr_to_stat("dsp_version", "dsp_version");
+    rs["in_holdover_since"] = 0;
+    switch (m_clock_state) {
+        case DexterClockState::Startup:
+            rs["clock_state"] = "startup"; break;
+        case DexterClockState::Normal:
+            rs["clock_state"] = "normal"; break;
+        case DexterClockState::Holdover:
+            rs["clock_state"] = "holdover";
+            rs["in_holdover_since"] = m_holdover_since_t;
+            break;
+    }
 
     constexpr double VMINFACT = 0.85;
     constexpr double VMAXFACT = 1.15;
@@ -589,9 +618,11 @@ size_t Dexter::receive_frame(
 }
 
 
-bool Dexter::is_clk_source_ok() const
+bool Dexter::is_clk_source_ok()
 {
-    return true;
+    handle_hw_time();
+
+    return m_clock_state != DexterClockState::Startup;
 }
 
 const char* Dexter::device_name(void) const
@@ -623,8 +654,6 @@ void Dexter::transmit_frame(struct FrameData&& frame)
 
     const bool require_timestamped_tx = (m_conf.enableSync and frame.ts.timestamp_valid);
 
-    handle_hw_time();
-
     if (not m_channel_is_up) {
         if (require_timestamped_tx) {
             if (m_clock_state == DexterClockState::Startup) {
diff --git a/src/output/Dexter.h b/src/output/Dexter.h
index f70bb14..d4f425f 100644
--- a/src/output/Dexter.h
+++ b/src/output/Dexter.h
@@ -84,7 +84,7 @@ class Dexter : public Output::SDRDevice
                 double timeout_secs) override;
 
         // Return true if GPS and reference clock inputs are ok
-        virtual bool is_clk_source_ok() const override;
+        virtual bool is_clk_source_ok() override;
         virtual const char* device_name() const override;
 
         virtual std::optional<double> get_temperature() const override;
@@ -129,6 +129,7 @@ class Dexter : public Output::SDRDevice
         // Only valid when m_clock_state Holdover
         std::chrono::steady_clock::time_point m_holdover_since =
             std::chrono::steady_clock::time_point::min();
+        std::time_t m_holdover_since_t = 0;
 };
 
 } // namespace Output
diff --git a/src/output/Lime.cpp b/src/output/Lime.cpp
index 83c54ad..8fb90bb 100644
--- a/src/output/Lime.cpp
+++ b/src/output/Lime.cpp
@@ -361,7 +361,7 @@ size_t Lime::receive_frame(
     return 0;
 }
 
-bool Lime::is_clk_source_ok() const
+bool Lime::is_clk_source_ok()
 {
     // TODO
     return true;
diff --git a/src/output/Lime.h b/src/output/Lime.h
index e09e82d..4510bf2 100644
--- a/src/output/Lime.h
+++ b/src/output/Lime.h
@@ -79,7 +79,7 @@ class Lime : public Output::SDRDevice
         double timeout_secs) override;
 
     // Return true if GPS and reference clock inputs are ok
-    virtual bool is_clk_source_ok(void) const override;
+    virtual bool is_clk_source_ok(void) override;
     virtual const char *device_name(void) const override;
 
     virtual std::optional<double> get_temperature(void) const override;
diff --git a/src/output/SDR.cpp b/src/output/SDR.cpp
index 860d8ed..11321f2 100644
--- a/src/output/SDR.cpp
+++ b/src/output/SDR.cpp
@@ -258,44 +258,19 @@ const char* SDR::name()
     return m_name.c_str();
 }
 
-void SDR::sleep_through_frame()
-{
-    using namespace std::chrono;
-
-    const auto now = steady_clock::now();
-
-    if (not t_last_frame_initialised) {
-        t_last_frame = now;
-        t_last_frame_initialised = true;
-    }
-
-    const auto delta = now - t_last_frame;
-    const auto wait_time = transmission_frame_duration(m_config.dabMode);
-
-    if (wait_time > delta) {
-        this_thread::sleep_for(wait_time - delta);
-    }
-
-    t_last_frame += wait_time;
-}
 
 void SDR::handle_frame(struct FrameData&& frame)
 {
     // Assumes m_device is valid
 
     if (not m_device->is_clk_source_ok()) {
-        sleep_through_frame();
         return;
     }
 
     const auto& time_spec = frame.ts;
 
-    if (m_config.enableSync and m_config.muteNoTimestamps and
-            not time_spec.timestamp_valid) {
-        sleep_through_frame();
-        etiLog.log(info,
-                "OutputSDR: Muting sample %d : no timestamp\n",
-                frame.ts.fct);
+    if (m_config.enableSync and m_config.muteNoTimestamps and not time_spec.timestamp_valid) {
+        etiLog.log(info, "OutputSDR: Muting sample %d : no timestamp\n", frame.ts.fct);
         return;
     }
 
diff --git a/src/output/SDR.h b/src/output/SDR.h
index 9f08348..94c972b 100644
--- a/src/output/SDR.h
+++ b/src/output/SDR.h
@@ -72,7 +72,6 @@ class SDR : public ModOutput, public ModMetadata, public RemoteControllable {
     private:
         void process_thread_entry(void);
         void handle_frame(struct FrameData&& frame);
-        void sleep_through_frame(void);
 
         SDRDeviceConfig& m_config;
 
@@ -91,9 +90,6 @@ class SDR : public ModOutput, public ModMetadata, public RemoteControllable {
         uint32_t last_tx_second = 0;
         uint32_t last_tx_pps = 0;
         size_t   num_queue_overflows = 0;
-
-        bool     t_last_frame_initialised = false;
-        std::chrono::steady_clock::time_point t_last_frame;
 };
 
 }
diff --git a/src/output/SDRDevice.h b/src/output/SDRDevice.h
index 628372a..26272be 100644
--- a/src/output/SDRDevice.h
+++ b/src/output/SDRDevice.h
@@ -135,7 +135,7 @@ class SDRDevice {
         virtual std::optional<double> get_temperature(void) const = 0;
 
         // Return true if GPS and reference clock inputs are ok
-        virtual bool is_clk_source_ok(void) const = 0;
+        virtual bool is_clk_source_ok(void) = 0;
 
         virtual const char* device_name(void) const = 0;
 
diff --git a/src/output/Soapy.cpp b/src/output/Soapy.cpp
index 00df9dc..4d33e39 100644
--- a/src/output/Soapy.cpp
+++ b/src/output/Soapy.cpp
@@ -254,7 +254,7 @@ size_t Soapy::receive_frame(
 }
 
 
-bool Soapy::is_clk_source_ok() const
+bool Soapy::is_clk_source_ok()
 {
     // TODO
     return true;
diff --git a/src/output/Soapy.h b/src/output/Soapy.h
index b98ac21..4fce11a 100644
--- a/src/output/Soapy.h
+++ b/src/output/Soapy.h
@@ -78,7 +78,7 @@ class Soapy : public Output::SDRDevice
                 double timeout_secs) override;
 
         // Return true if GPS and reference clock inputs are ok
-        virtual bool is_clk_source_ok(void) const override;
+        virtual bool is_clk_source_ok(void) override;
         virtual const char* device_name(void) const override;
 
         virtual std::optional<double> get_temperature(void) const override;
diff --git a/src/output/UHD.cpp b/src/output/UHD.cpp
index 7f07ff2..6638b6c 100644
--- a/src/output/UHD.cpp
+++ b/src/output/UHD.cpp
@@ -439,7 +439,7 @@ size_t UHD::receive_frame(
 }
 
 // Return true if GPS and reference clock inputs are ok
-bool UHD::is_clk_source_ok(void) const
+bool UHD::is_clk_source_ok(void)
 {
     bool ok = true;
 
diff --git a/src/output/UHD.h b/src/output/UHD.h
index 97a821e..9891c7a 100644
--- a/src/output/UHD.h
+++ b/src/output/UHD.h
@@ -84,7 +84,7 @@ class UHD : public Output::SDRDevice
                 double timeout_secs) override;
 
         // Return true if GPS and reference clock inputs are ok
-        virtual bool is_clk_source_ok(void) const override;
+        virtual bool is_clk_source_ok(void) override;
         virtual const char* device_name(void) const override;
 
         virtual std::optional<double> get_temperature(void) const override;