Check runtime codec licenses on RPI

Related to #16.

src/player/PlayerComponent.cpp

@@ -19,6 +19,11 @@
 #include <string.h>
 #include <shared/Paths.h>
 
+#ifdef TARGET_RPI
+#include <bcm_host.h>
+#include <interface/vmcs_host/vcgencmd.h>
+#endif
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 static void wakeup_cb(void *context)
 {
@@ -146,6 +151,8 @@ bool PlayerComponent::componentInitialize()
   connect(SettingsComponent::Get().getSection(SETTINGS_SECTION_AUDIO), &SettingsSection::valuesUpdated,
           this, &PlayerComponent::setAudioConfiguration);
 
+  initializeCodecSupport();
+
   return true;
 }
 
@@ -807,6 +814,33 @@ void PlayerComponent::updateVideoSettings()
   mpv::qt::set_option_variant(m_mpv, "cache", cache.toInt() * 1024);
 }
 
+/////////////////////////////////////////////////////////////////////////////////////////
+void PlayerComponent::initializeCodecSupport()
+{
+  QMap<QString, QString> all = { {"vc1", "WVC1"}, {"mpeg2video", "MPG2"} };
+  for (auto name : all.keys())
+  {
+    bool ok = true;
+#ifdef TARGET_RPI
+    char res[100] = "";
+    bcm_host_init();
+    if (vc_gencmd(res, sizeof(res), "codec_enabled %s", all[name].toUtf8().data()))
+      res[0] = '\0'; // error
+    ok = !!strstr(res, "=enabled");
+#endif
+    m_codecSupport[name] = ok;
+    QLOG_INFO() << "Codec" << name << (ok ? "present" : "disabled");
+  }
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+bool PlayerComponent::checkCodecSupport(const QString& codec)
+{
+  if (m_codecSupport.contains(codec))
+    return m_codecSupport[codec];
+  return true; // doesn't matter if unknown codecs are reported as "ok"
+}
+
 /////////////////////////////////////////////////////////////////////////////////////////
 void PlayerComponent::userCommand(QString command)
 {

src/player/PlayerComponent.h

@@ -90,6 +90,11 @@ public:
   // only. If no video is running, render a black background only.
   Q_INVOKABLE virtual void setVideoOnlyMode(bool enable);
 
+  // Currently is meant to check for "vc1" and "mpeg2video". Will return whether
+  // it can be natively decoded. Will return true for all other codecs,
+  // including unknown codec names.
+  Q_INVOKABLE virtual bool checkCodecSupport(const QString& codec);
+
   Q_INVOKABLE void userCommand(QString command);
 
   const mpv::qt::Handle getMpvHandle() const { return m_mpv; }
@@ -166,6 +171,7 @@ private:
   bool switchDisplayFrameRate();
   void checkCurrentAudioDevice(const QSet<QString>& old_devs, const QSet<QString>& new_devs);
   void appendAudioFormat(QTextStream& info, const QString& property) const;
+  void initializeCodecSupport();
 
   mpv::qt::Handle m_mpv;
 
@@ -179,6 +185,7 @@ private:
   QTimer m_reloadAudioTimer;
   QSet<QString> m_audioDevices;
   bool m_streamSwitchImminent;
+  QMap<QString, bool> m_codecSupport;
 };
 
 #endif // PLAYERCOMPONENT_H