Add support for Tegra V4L2 VDA

content/common/gpu/media/v4l2_video_decode_accelerator.h

Index: content/common/gpu/media/v4l2_video_decode_accelerator.h
diff --git a/content/common/gpu/media/v4l2_video_decode_accelerator.h b/content/common/gpu/media/v4l2_video_decode_accelerator.h
index 0c6a4930714de29f9a10d33975255dc90d011f26..97c13628f43c2968c149c876877781ecc279159e 100644
--- a/content/common/gpu/media/v4l2_video_decode_accelerator.h
+++ b/content/common/gpu/media/v4l2_video_decode_accelerator.h
@@ -11,6 +11,7 @@
 
 #include <queue>
 #include <vector>
+#include <linux/videodev2.h>

[Pawel Osciak, 2014/03/25 08:21:08]

Why did we not need this before? If this is for v4l2_format, we were already
using it...

[shivdasp, 2014/03/25 10:36:40]

This was for v4l2_format but now if we use frame_buffer_size_ then
current_format_ can go away and hence this too.

On 2014/03/25 08:21:08, Pawel Osciak wrote:

 
 #include "base/callback_forward.h"
 #include "base/memory/linked_ptr.h"
@@ -294,6 +295,13 @@ class CONTENT_EXPORT V4L2VideoDecodeAccelerator
   // Callback that indicates a picture has been cleared.
   void PictureCleared();
 
+  // This method determines whether a resolution change event processing
+  // is indeed required by returning true if either:
+  // - width or height of the new format is different than previous format.
+  // - V4L2_CID_MIN_BUFFERS_FOR_CAPTURE has changed.
+  // Returns false otherwise.
+  bool IsResolutionChangeNecessary();
+
   // Our original calling message loop for the child thread.
   scoped_refptr<base::MessageLoopProxy> child_message_loop_proxy_;
 
@@ -426,6 +434,12 @@ class CONTENT_EXPORT V4L2VideoDecodeAccelerator
   // The codec we'll be decoding for.
   media::VideoCodecProfile video_profile_;
 
+  // Stores the current format. This is used to check against
+  // the format received when we dequeue a RESOLUTION_CHANGE event.
+  // Resolution change sequence is only executed if the new format is different
+  // than the current_format_.
+  struct v4l2_format current_format_;
+
   DISALLOW_COPY_AND_ASSIGN(V4L2VideoDecodeAccelerator);
 };