[SoftCSA] Defer skin notification until SoftDecoder has a running decoder

When switching between SoftCSA channels, the skin was notified via
evUpdatedInfo immediately after SoftDecoder takeover. At that point the
SoftDecoder's hardware decoder does not exist yet (it is created only
after the first CW arrives), so getVideoHeight() returns -1. The skin
falls back to eAVControl which reads /proc/stb/vmpeg/0/yres from the
just-released HW decoder, returning 0. This causes the HD icon to grey
out. On platforms where VIDEO_EVENT_SIZE_CHANGED is suppressed for
identical resolutions (e.g. VU Solo4K), the icon never recovers.

Add a m_decoder_ready signal to eDVBSoftDecoder, fired after the decoder
reaches PLAY state. eDVBServicePlay defers the evUpdatedInfo notification
until this signal arrives, ensuring the skin queries valid video info.

Author: WXbet

lib/service/servicedvb.cpp

@@ -4448,12 +4448,13 @@ void eDVBServicePlay::onSessionActivated(bool active)
 
 		eDebug("[eDVBServicePlay] SoftDecoder takeover complete");
 
-		// Notify listeners (skin converters) that service info has changed (IsSoftCSA icon display)
-		m_event((iPlayableService*)this, evUpdatedInfo);
+		// Connect decoder-ready signal: SoftDecoder fires this after decoder PLAY,
+		// when video info is actually queryable. We defer evUpdatedInfo until then
+		// to avoid the skin querying -1 values before the decoder exists.
+		m_soft_decoder->m_decoder_ready.connect(
+			sigc::mem_fun(*this, &eDVBServicePlay::onSoftDecoderReady));
 
-		// Reset video info flag - a second evUpdatedInfo will be sent when first video event arrives
-		// This is needed because some skins query video resolution only on evUpdatedInfo
-		// and the decoder hasn't analyzed any frames yet at this point
+		// Reset video info flag - will be set on first video size event from decoder
 		m_soft_decoder_video_info_valid = false;
 	}
 	else if (!active && m_soft_decoder)
@@ -4468,6 +4469,12 @@ void eDVBServicePlay::onSessionActivated(bool active)
 	}
 }
 
+void eDVBServicePlay::onSoftDecoderReady()
+{
+	eDebug("[eDVBServicePlay] SoftDecoder decoder ready - notifying skin");
+	m_event((iPlayableService*)this, evUpdatedInfo);
+}
+
 void eDVBServicePlay::onSoftDecoderAudioPidSelected(int pid)
 {
 	// SoftDecoder selected an audio track - update our tracking variable

lib/service/servicedvb.h

@@ -355,6 +355,7 @@ class eDVBServicePlay : public eDVBServiceBase,
 	// Software descrambling
 	virtual void setupSpeculativeDescrambling();
 	void onSessionActivated(bool active);
+	void onSoftDecoderReady();
 	void onSoftDecoderAudioPidSelected(int pid);
 	void cleanupSoftwareDescrambling();
 

lib/service/servicedvbsoftdecoder.cpp

@@ -688,6 +688,7 @@ void eDVBSoftDecoder::updateDecoder(int vpid, int vpidtype, int pcrpid)
 		{
 			m_decoder->play();
 			eDebug("[eDVBSoftDecoder] Decoder PLAY with vpid=%04x vpidtype=%d", vpid, vpidtype);
+			m_decoder_ready();
 		}
 		else
 		{

lib/service/servicedvbsoftdecoder.h

@@ -89,6 +89,9 @@ class eDVBSoftDecoder : public iObject, public sigc::trackable
 	// Audio track selection signal (notifies parent when SoftDecoder selects audio)
 	sigc::signal<void(int)> m_audio_pid_selected;
 
+	// Decoder ready signal (fired after decoder PLAY, video info now queryable)
+	sigc::signal<void()> m_decoder_ready;
+
 private:
 	eDVBServicePMTHandler& m_source_handler;
 	eDVBServicePMTHandler m_pvr_handler;  // Separate PVR handler for decode demux