16 bpp video stream capture, render and WebGL usage - Realsense R200 & SR300 support.

media/capture/video/video_capture_device_client.cc

Index: media/capture/video/video_capture_device_client.cc
diff --git a/media/capture/video/video_capture_device_client.cc b/media/capture/video/video_capture_device_client.cc
index d9874a78814cbb6d8c36d5f2a82822436908e9f4..4f7ab430f9ab1dab588ba3927ed8fcd246710fca 100644
--- a/media/capture/video/video_capture_device_client.cc
+++ b/media/capture/video/video_capture_device_client.cc
@@ -27,6 +27,15 @@ using media::VideoCaptureFormat;
 using media::VideoFrame;
 using media::VideoFrameMetadata;
 
+namespace {
+
+bool isFormatSupported(media::VideoPixelFormat pixel_format) {
+  // Currently, only I420 and Y16 pixel formats are supported.
+  return (pixel_format == media::PIXEL_FORMAT_I420 ||
+          pixel_format == media::PIXEL_FORMAT_Y16);
+}
+}
+
 namespace media {
 
 // Class combining a Client::Buffer interface implementation and a pool buffer
@@ -106,12 +115,22 @@ void VideoCaptureDeviceClient::OnIncomingCapturedData(
   if (!frame_format.IsValid())
     return;
 
+  // The input |length| can be greater than the required buffer size because of
+  // paddings and/or alignments, but it cannot be smaller.
+  DCHECK_GE(static_cast<size_t>(length), frame_format.ImageAllocationSize());
+
+  const bool useFullSize = frame_format.pixel_format == media::PIXEL_FORMAT_Y16;
+
   // |chopped_{width,height} and |new_unrotated_{width,height}| are the lowest
   // bit decomposition of {width, height}, grabbing the odd and even parts.
   const int chopped_width = frame_format.frame_size.width() & 1;
   const int chopped_height = frame_format.frame_size.height() & 1;
-  const int new_unrotated_width = frame_format.frame_size.width() & ~1;
-  const int new_unrotated_height = frame_format.frame_size.height() & ~1;
+  const int new_unrotated_width = (useFullSize)
+                                      ? frame_format.frame_size.width()
+                                      : (frame_format.frame_size.width() & ~1);
+  const int new_unrotated_height =
+      (useFullSize) ? frame_format.frame_size.height()
+                    : (frame_format.frame_size.height() & ~1);
 
   int destination_width = new_unrotated_width;
   int destination_height = new_unrotated_height;
@@ -129,19 +148,36 @@ void VideoCaptureDeviceClient::OnIncomingCapturedData(
     rotation_mode = libyuv::kRotate270;
 
   const gfx::Size dimensions(destination_width, destination_height);
-  uint8_t *y_plane_data, *u_plane_data, *v_plane_data;
+  uint8_t* y_plane_data = 0;
+  uint8_t* u_plane_data = 0;
+  uint8_t* v_plane_data = 0;
+
   std::unique_ptr<Buffer> buffer(
-      ReserveI420OutputBuffer(dimensions, media::PIXEL_STORAGE_CPU,
-                              &y_plane_data, &u_plane_data, &v_plane_data));
+      (frame_format.pixel_format == media::PIXEL_FORMAT_Y16)
+          ? ReserveOutputBuffer(dimensions, frame_format.pixel_format,
+                                media::PIXEL_STORAGE_CPU)
+          : ReserveI420OutputBuffer(dimensions, media::PIXEL_STORAGE_CPU,
+                                    &y_plane_data, &u_plane_data,
+                                    &v_plane_data));
 #if DCHECK_IS_ON()
   dropped_frame_counter_ = buffer.get() ? 0 : dropped_frame_counter_ + 1;
   if (dropped_frame_counter_ >= kMaxDroppedFrames)
     OnError(FROM_HERE, "Too many frames dropped");
 #endif
-  // Failed to reserve I420 output buffer, so drop the frame.
+  // Failed to reserve output buffer, so drop the frame.
   if (!buffer.get())
     return;
 
+  if (frame_format.pixel_format == media::PIXEL_FORMAT_Y16) {
+    memcpy(buffer->data(), data, length);
+    const VideoCaptureFormat output_format =
+        VideoCaptureFormat(dimensions, frame_format.frame_rate,
+                           frame_format.pixel_format, media::PIXEL_STORAGE_CPU);
+    OnIncomingCapturedBuffer(std::move(buffer), output_format, reference_time,
+                             timestamp);
+    return;
+  }
+
   const int yplane_stride = dimensions.width();
   const int uv_plane_stride = yplane_stride / 2;
   int crop_x = 0;
@@ -257,8 +293,7 @@ VideoCaptureDeviceClient::ReserveOutputBuffer(
     media::VideoPixelStorage pixel_storage) {
   DCHECK_GT(frame_size.width(), 0);
   DCHECK_GT(frame_size.height(), 0);
-  // Currently, only I420 pixel format is supported.
-  DCHECK_EQ(media::PIXEL_FORMAT_I420, pixel_format);
+  DCHECK(isFormatSupported(pixel_format));
 
   // TODO(mcasas): For PIXEL_STORAGE_GPUMEMORYBUFFER, find a way to indicate if
   // it's a ShMem GMB or a DmaBuf GMB.
@@ -278,8 +313,7 @@ void VideoCaptureDeviceClient::OnIncomingCapturedBuffer(
     const VideoCaptureFormat& frame_format,
     base::TimeTicks reference_time,
     base::TimeDelta timestamp) {
-  // Currently, only I420 pixel format is supported.
-  DCHECK_EQ(media::PIXEL_FORMAT_I420, frame_format.pixel_format);
+  DCHECK(isFormatSupported(frame_format.pixel_format));
   DCHECK_EQ(media::PIXEL_STORAGE_CPU, frame_format.pixel_storage);
 
   scoped_refptr<VideoFrame> frame;
@@ -288,10 +322,10 @@ void VideoCaptureDeviceClient::OnIncomingCapturedBuffer(
     frame->set_timestamp(timestamp);
   } else {
     frame = VideoFrame::WrapExternalSharedMemory(
-        media::PIXEL_FORMAT_I420, frame_format.frame_size,
+        frame_format.pixel_format, frame_format.frame_size,
         gfx::Rect(frame_format.frame_size), frame_format.frame_size,
         reinterpret_cast<uint8_t*>(buffer->data()),
-        VideoFrame::AllocationSize(media::PIXEL_FORMAT_I420,
+        VideoFrame::AllocationSize(frame_format.pixel_format,
                                    frame_format.frame_size),
         base::SharedMemory::NULLHandle(), 0u, timestamp);
   }