Update sendspin-cpp and add static delay support

CMakeLists.txt

@@ -8,10 +8,17 @@ include(FetchContent)
 set(CMAKE_C_FLAGS_RELEASE   "-O3 -DNDEBUG" CACHE STRING "" FORCE)
 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG" CACHE STRING "" FORCE)
 
+set(SENDSPIN_ENABLE_PLAYER     ON  CACHE BOOL "" FORCE)
+set(SENDSPIN_ENABLE_CONTROLLER OFF CACHE BOOL "" FORCE)
+set(SENDSPIN_ENABLE_METADATA   OFF CACHE BOOL "" FORCE)
+set(SENDSPIN_ENABLE_COLOR      OFF CACHE BOOL "" FORCE)
+set(SENDSPIN_ENABLE_ARTWORK    OFF CACHE BOOL "" FORCE)
+set(SENDSPIN_ENABLE_VISUALIZER OFF CACHE BOOL "" FORCE)
+
 FetchContent_Declare(
     sendspin-cpp
     GIT_REPOSITORY https://github.com/Sendspin/sendspin-cpp.git
-    GIT_TAG        v0.1.0
+    GIT_TAG        v0.4.0
     GIT_SHALLOW    TRUE
     EXCLUDE_FROM_ALL  # do not build sendspin-cpp's own examples
 )

config/sendspin-armv6.conf

@@ -27,3 +27,9 @@ device = plughw:0,0
 # too quiet.  The server may override this once a connection is established.
 # Leave commented out to let the server control volume from the start.
 #initial_volume = 80
+
+# Optional: Initial static playback delay in milliseconds (0–5000).
+# Adds a fixed delay before playback starts, which can help keep multiple
+# players in sync across the network.  The server may adjust this at runtime.
+# Leave commented out for no initial static delay.
+#initial_static_delay = 200

src/config.cpp

@@ -57,6 +57,19 @@ bool load_config(const std::string& path, Config& config) {
                 fprintf(stderr, "%s:%d: invalid initial_volume value '%s', ignoring\n",
                         path.c_str(), line_num, value.c_str());
             }
+        } else if (key == "initial_static_delay") {
+            try {
+                int v = std::stoi(value);
+                if (v < 0 || v > 5000) {
+                    fprintf(stderr, "%s:%d: initial_static_delay must be 0-5000 (ms), ignoring\n",
+                            path.c_str(), line_num);
+                } else {
+                    config.initial_static_delay_ms = v;
+                }
+            } catch (const std::exception&) {
+                fprintf(stderr, "%s:%d: invalid initial_static_delay value '%s', ignoring\n",
+                        path.c_str(), line_num, value.c_str());
+            }
         } else {
             fprintf(stderr, "%s:%d: unknown key '%s'\n", path.c_str(), line_num,
                     key.c_str());

src/config.h

@@ -4,11 +4,12 @@
 
 /// Configuration loaded from /etc/sendspin-armv6.conf
 struct Config {
-    std::string server_url;   // e.g. ws://192.168.1.10:8928/sendspin
+    std::string server_url;            // e.g. ws://192.168.1.10:8928/sendspin
     std::string name = "sendspin-armv6";
     std::string log_level = "info";
-    std::string device;       // ALSA device, e.g. plughw:1,0 (empty = system default)
-    int initial_volume = -1;  // 0-100 to override hardware volume on startup; -1 = server default
+    std::string device;                // ALSA device, e.g. plughw:1,0 (empty = system default)
+    int initial_volume = -1;           // 0-100 to override hardware volume on startup; -1 = server default
+    int initial_static_delay_ms = -1;  // 0-5000 ms; -1 = no initial delay
 };
 
 /// Parse a simple key=value config file.

src/main.cpp

@@ -109,7 +109,7 @@ int main(int argc, char* argv[]) {
     SendspinClient client(std::move(client_config));
 
     // Add player role with supported audio formats
-    PlayerRole::Config player_config;
+    PlayerRoleConfig player_config;
     player_config.audio_formats = {
         {SendspinCodecFormat::FLAC, 2, 44100, 16},
         {SendspinCodecFormat::FLAC, 2, 48000, 16},
@@ -124,6 +124,10 @@ int main(int argc, char* argv[]) {
     // playback time already accounts for the hardware buffer.  No additional
     // fixed delay compensation is required.
     player_config.fixed_delay_us = AlsaPipeSink::PIPELINE_DELAY_US;
+    if (cfg.initial_static_delay_ms >= 0) {
+        player_config.initial_static_delay_ms =
+            static_cast<uint16_t>(cfg.initial_static_delay_ms);
+    }
     auto& player = client.add_player(std::move(player_config));
 
     // Audio output via aplay pipe
@@ -166,6 +170,9 @@ int main(int argc, char* argv[]) {
 
         void on_volume_changed(uint8_t vol) override { sink.set_volume(vol); }
         void on_mute_changed(bool muted) override { sink.set_muted(muted); }
+        void on_static_delay_changed(uint16_t delay_ms) override {
+            fprintf(stderr, ">>> Static delay changed to %u ms\n", delay_ms);
+        }
     };
 
     struct ArmClientListener : SendspinClientListener {
@@ -189,6 +196,7 @@ int main(int argc, char* argv[]) {
     HostNetworkProvider network_provider;
 
     player.set_listener(&player_listener);
+    player.set_static_delay_adjustable(true);
     client.set_listener(&client_listener);
     client.set_network_provider(&network_provider);