16 bpp video stream capture, render and createImageBitmap(video) using (CPU) shared memory buffers

content/browser/renderer_host/media/video_capture_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/media/video_capture_controller.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
@@ skipping 195 matching lines @@
     const media::VideoCaptureParams& params) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DVLOG(1) << "VideoCaptureController::AddClient() -- id=" << id
            << ", session_id=" << session_id
            << ", params.requested_format="
            << media::VideoCaptureFormat::ToString(params.requested_format);
 
   // Check that requested VideoCaptureParams are valid and supported.  If not,
   // report an error immediately and punt.
   if (!params.IsValid() ||
-      params.requested_format.pixel_format != media::PIXEL_FORMAT_I420 ||
+      !(params.requested_format.pixel_format == media::PIXEL_FORMAT_I420 ||
+        params.requested_format.pixel_format == media::PIXEL_FORMAT_Y16) ||
       params.requested_format.pixel_storage != media::PIXEL_STORAGE_CPU) {
     // Crash in debug builds since the renderer should not have asked for
     // invalid or unsupported parameters.
     LOG(DFATAL) << "Invalid or unsupported video capture parameters requested: "
                 << media::VideoCaptureFormat::ToString(params.requested_format);
     event_handler->OnError(id);
     return;
   }
 
   // If this is the first client added to the controller, cache the parameters.
@@ skipping 182 matching lines @@
   int count = 0;
   if (state_ == VIDEO_CAPTURE_STATE_STARTED) {
     if (!frame->metadata()->HasKey(VideoFrameMetadata::FRAME_RATE)) {
       frame->metadata()->SetDouble(VideoFrameMetadata::FRAME_RATE,
                                    video_capture_format_.frame_rate);
     }
     std::unique_ptr<base::DictionaryValue> metadata(
         new base::DictionaryValue());
     frame->metadata()->MergeInternalValuesInto(metadata.get());
 
-    // Only I420 pixel format is currently supported.
-    DCHECK_EQ(frame->format(), media::PIXEL_FORMAT_I420)
+    // Only I420 and Y16 pixel formats are currently supported.
+    DCHECK(frame->format() == media::PIXEL_FORMAT_I420 ||
+           frame->format() == media::PIXEL_FORMAT_Y16)
         << "Unsupported pixel format: "
         << media::VideoPixelFormatToString(frame->format());
 
     // Sanity-checks to confirm |frame| is actually being backed by |buffer|.
     DCHECK(frame->storage_type() == media::VideoFrame::STORAGE_SHMEM);
     DCHECK(frame->data(media::VideoFrame::kYPlane) >= buffer->data(0) &&
            (frame->data(media::VideoFrame::kYPlane) <
             (reinterpret_cast<const uint8_t*>(buffer->data(0)) +
              buffer->mapped_size())))
         << "VideoFrame does not appear to be backed by Buffer";
@@ skipping 97 matching lines @@
     int session_id,
     const ControllerClients& clients) {
   for (const auto& client : clients) {
     if (client->session_id == session_id)
       return client.get();
   }
   return nullptr;
 }
 
 }  // namespace content