[WebCodecs] Implement pixel buffer conversion for video frames produc…

…ed by libwebrtc VPX decoders

https://bugs.webkit.org/show_bug.cgi?id=246998
rdar://problem/101534191

Reviewed by Eric Carlson.

Our drawing path requires conversion to CVPixelBuffer right now.
Implement the conversion for now.

* LayoutTests/imported/w3c/web-platform-tests/webcodecs/videoFrame-createImageBitmap.https.any-expected.txt:
* Source/WebCore/platform/LibWebRTCVPXVideoDecoder.cpp:
(WebCore::LibWebRTCVPXInternalVideoDecoder::Decoded):

Canonical link: https://commits.webkit.org/255958@main

LayoutTests/imported/w3c/web-platform-tests/webcodecs/videoFrame-createImageBitmap.https.any-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Create ImageBitmap for a VideoFrame from VP9 decoder. assert_approx_equals: expected 50 +/- 10 but got 0
+PASS Create ImageBitmap for a VideoFrame from VP9 decoder.
 

Source/WebCore/platform/LibWebRTCVPXVideoDecoder.cpp

@@ -28,6 +28,7 @@
 
 #if ENABLE(WEB_CODECS) && USE(LIBWEBRTC)
 
+#include "Logging.h"
 #include "VideoFrameLibWebRTC.h"
 #include <wtf/FastMalloc.h>
 #include <wtf/NeverDestroyed.h>
@@ -45,6 +46,8 @@ ALLOW_COMMA_BEGIN
 ALLOW_COMMA_END
 ALLOW_UNUSED_PARAMETERS_END
 
+#include "CoreVideoSoftLink.h"
+
 namespace WebCore {
 
 static WorkQueue& vpxQueue()
@@ -164,9 +167,28 @@ int32_t LibWebRTCVPXInternalVideoDecoder::Decoded(webrtc::VideoFrame& frame)
         if (protectedThis->m_isClosed)
             return;
 
-        auto videoFrame = VideoFrameLibWebRTC::create({ }, false, VideoFrame::Rotation::None, WTFMove(buffer), [](auto&) {
-            // FIXME: To implement.
-            return nullptr;
+        auto videoFrame = VideoFrameLibWebRTC::create({ }, false, VideoFrame::Rotation::None, WTFMove(buffer), [](auto& buffer) {
+            return adoptCF(webrtc::createPixelBufferFromFrameBuffer(buffer, [](size_t width, size_t height, webrtc::BufferType bufferType) -> CVPixelBufferRef {
+                OSType pixelBufferType;
+                switch (bufferType) {
+                case webrtc::BufferType::I420:
+                    pixelBufferType = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
+                    break;
+                case webrtc::BufferType::I010:
+                    pixelBufferType = kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange;
+                    break;
+                default:
+                    return nullptr;
+                }
+
+                CVPixelBufferRef pixelBuffer = nullptr;
+                auto status = CVPixelBufferCreate(kCFAllocatorDefault, width, height, pixelBufferType, nullptr, &pixelBuffer);
+                if (status != kCVReturnSuccess) {
+                    RELEASE_LOG_ERROR(Media, "Failed creating a pixel buffer for converting a VPX frame with error %d", status);
+                    return nullptr;
+                }
+                return pixelBuffer;
+            }));
         });
 
         protectedThis->m_outputCallback(VideoDecoder::DecodedFrame { WTFMove(videoFrame), timestamp, duration });