Add optional max supported resolution on MediaFoundationVideoEncodeAccelerator

media/gpu/media_foundation_video_encode_accelerator_win.cc

Index: media/gpu/media_foundation_video_encode_accelerator_win.cc
diff --git a/media/gpu/media_foundation_video_encode_accelerator_win.cc b/media/gpu/media_foundation_video_encode_accelerator_win.cc
index a43e2ad236bcecd15efa45ec2c10755c7a98cf53..17ba2b25463aa96b032482ba0226767d1bf4b956 100644
--- a/media/gpu/media_foundation_video_encode_accelerator_win.cc
+++ b/media/gpu/media_foundation_video_encode_accelerator_win.cc
@@ -34,8 +34,8 @@ namespace {
 const int32_t kDefaultTargetBitrate = 5000000;
 const size_t kMaxFrameRateNumerator = 30;
 const size_t kMaxFrameRateDenominator = 1;
-const size_t kMaxResolutionWidth = 3840;
-const size_t kMaxResolutionHeight = 2176;
+const size_t kMaxResolutionWidth = 1920;
+const size_t kMaxResolutionHeight = 1088;
 const size_t kNumInputBuffers = 3;
 // Media Foundation uses 100 nanosecond units for time, see
 // https://msdn.microsoft.com/en-us/library/windows/desktop/ms697282(v=vs.85).aspx
@@ -46,6 +46,9 @@ constexpr const wchar_t* const kMediaFoundationVideoEncoderDLLs[] = {
     L"mf.dll", L"mfplat.dll",
 };
 
+// Resolutions that some platforms support, should be listed in ascending order.
+constexpr const gfx::Size kOptionalMaxResolutions[] = {gfx::Size(3840, 2176)};
+
 }  // namespace
 
 class MediaFoundationVideoEncodeAccelerator::EncodeOutput {
@@ -101,7 +104,6 @@ MediaFoundationVideoEncodeAccelerator::GetSupportedProfiles() {
   DCHECK(main_client_task_runner_->BelongsToCurrentThread());
 
   SupportedProfiles profiles;
-
   target_bitrate_ = kDefaultTargetBitrate;
   frame_rate_ = kMaxFrameRateNumerator / kMaxFrameRateDenominator;
   input_visible_size_ = gfx::Size(kMaxResolutionWidth, kMaxResolutionHeight);
@@ -112,6 +114,14 @@ MediaFoundationVideoEncodeAccelerator::GetSupportedProfiles() {
         << "Hardware encode acceleration is not available on this platform.";
     return profiles;
   }
+
+  gfx::Size highest_supported_resolution = input_visible_size_;
+  for (const auto& resolution : kOptionalMaxResolutions) {
+    DCHECK_GT(resolution.GetArea(), highest_supported_resolution.GetArea());
+    if (!IsResolutionSupported(resolution))
+      break;
+    highest_supported_resolution = resolution;
+  }
   ReleaseEncoderResources();
 
   SupportedProfile profile;
@@ -120,7 +130,7 @@ MediaFoundationVideoEncodeAccelerator::GetSupportedProfiles() {
   profile.profile = H264PROFILE_BASELINE;
   profile.max_framerate_numerator = kMaxFrameRateNumerator;
   profile.max_framerate_denominator = kMaxFrameRateDenominator;
-  profile.max_resolution = gfx::Size(kMaxResolutionWidth, kMaxResolutionHeight);
+  profile.max_resolution = highest_supported_resolution;
   profiles.push_back(profile);
   return profiles;
 }
@@ -449,6 +459,28 @@ bool MediaFoundationVideoEncodeAccelerator::SetEncoderModes() {
   return SUCCEEDED(hr);
 }
 
+bool MediaFoundationVideoEncodeAccelerator::IsResolutionSupported(
+    const gfx::Size& resolution) {
+  DCHECK(main_client_task_runner_->BelongsToCurrentThread());
+  DCHECK(encoder_);
+
+  HRESULT hr =
+      MFSetAttributeSize(imf_output_media_type_.get(), MF_MT_FRAME_SIZE,
+                         resolution.width(), resolution.height());
+  RETURN_ON_HR_FAILURE(hr, "Couldn't set frame size", false);
+  hr = encoder_->SetOutputType(output_stream_id_, imf_output_media_type_.get(),
+                               0);
+  RETURN_ON_HR_FAILURE(hr, "Couldn't set output media type", false);
+
+  hr = MFSetAttributeSize(imf_input_media_type_.get(), MF_MT_FRAME_SIZE,
+                          resolution.width(), resolution.height());
+  RETURN_ON_HR_FAILURE(hr, "Couldn't set frame size", false);
+  hr = encoder_->SetInputType(input_stream_id_, imf_input_media_type_.get(), 0);
+  RETURN_ON_HR_FAILURE(hr, "Couldn't set input media type", false);
+
+  return true;
+}
+
 void MediaFoundationVideoEncodeAccelerator::NotifyError(
     VideoEncodeAccelerator::Error error) {
   DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());