Incoming video track renderer should rely on the track intrinsic size https://bugs.webkit.org/show_bug.cgi?id=274093

Reviewed by Xabier Rodriguez-Calvar.

Pixel and display aspect ratios shouldn't be applied for WebRTC video tracks. The intrinsic size is
re-used as it is. The avf MediaStream player behaves similarly.

* Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:
(WebCore::MediaPlayerPrivateGStreamer::updateVideoSizeAndOrientationFromCaps):
* Source/WebCore/platform/mediastream/gstreamer/RealtimeIncomingVideoSourceGStreamer.cpp:
(WebCore::RealtimeIncomingVideoSourceGStreamer::ensureSizeAndFramerate):
(WebCore::RealtimeIncomingVideoSourceGStreamer::dispatchSample):

Canonical link: https://commits.webkit.org/278745@main

Author: philn

Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp

@@ -3595,8 +3595,21 @@ void MediaPlayerPrivateGStreamer::updateVideoSizeAndOrientationFromCaps(const Gs
     if (m_videoSourceOrientation.usesWidthAsHeight())
         originalSize = originalSize.transposedSize();
 
+    auto scopeExit = makeScopeExit([&] {
+        if (auto* player = m_player) {
+            GST_DEBUG_OBJECT(pipeline(), "Notifying sizeChanged event to upper layer");
+            player->sizeChanged();
+        }
+    });
+
     GST_DEBUG_OBJECT(pipeline(), "Original video size: %dx%d", originalSize.width(), originalSize.height());
-    GST_DEBUG_OBJECT(pipeline(), "Pixel aspect ratio: %d/%d", pixelAspectRatioNumerator, pixelAspectRatioDenominator);
+    if (isMediaStreamPlayer()) {
+        GST_DEBUG_OBJECT(pipeline(), "Using original MediaStream track video intrinsic size");
+        m_videoSize = originalSize;
+        return;
+    }
+
+    GST_DEBUG_OBJECT(pipeline(), "Applying pixel aspect ratio: %d/%d", pixelAspectRatioNumerator, pixelAspectRatioDenominator);
 
     // Calculate DAR based on PAR and video size.
     int displayWidth = originalSize.width() * pixelAspectRatioNumerator;
@@ -3625,7 +3638,6 @@ void MediaPlayerPrivateGStreamer::updateVideoSizeAndOrientationFromCaps(const Gs
 
     GST_DEBUG_OBJECT(pipeline(), "Saving natural size: %" G_GUINT64_FORMAT "x%" G_GUINT64_FORMAT, width, height);
     m_videoSize = FloatSize(static_cast<int>(width), static_cast<int>(height));
-    m_player->sizeChanged();
 }
 
 void MediaPlayerPrivateGStreamer::setCachedPosition(const MediaTime& cachedPosition) const

Source/WebCore/platform/mediastream/gstreamer/RealtimeIncomingVideoSourceGStreamer.cpp

@@ -103,7 +103,7 @@ void RealtimeIncomingVideoSourceGStreamer::settingsDidChange(OptionSet<RealtimeM
 void RealtimeIncomingVideoSourceGStreamer::ensureSizeAndFramerate(const GRefPtr<GstCaps>& caps)
 {
     if (auto size = getVideoResolutionFromCaps(caps.get()))
-        setSize({ static_cast<int>(size->width()), static_cast<int>(size->height()) });
+        setIntrinsicSize({ static_cast<int>(size->width()), static_cast<int>(size->height()) });
 
     int frameRateNumerator, frameRateDenominator;
     auto* structure = gst_caps_get_structure(caps.get(), 0);
@@ -122,7 +122,7 @@ void RealtimeIncomingVideoSourceGStreamer::dispatchSample(GRefPtr<GstSample>&& s
     auto* caps = gst_sample_get_caps(sample.get());
     ensureSizeAndFramerate(GRefPtr<GstCaps>(caps));
 
-    videoFrameAvailable(VideoFrameGStreamer::create(WTFMove(sample), size(), fromGstClockTime(GST_BUFFER_PTS(buffer))), { });
+    videoFrameAvailable(VideoFrameGStreamer::create(WTFMove(sample), intrinsicSize(), fromGstClockTime(GST_BUFFER_PTS(buffer))), { });
 }
 
 const GstStructure* RealtimeIncomingVideoSourceGStreamer::stats()