Add stride for imported Dmabuf in ArcVideoAccelerator.

chrome/gpu/arc_gpu_video_decode_accelerator.h

Index: chrome/gpu/arc_gpu_video_decode_accelerator.h
diff --git a/chrome/gpu/arc_gpu_video_decode_accelerator.h b/chrome/gpu/arc_gpu_video_decode_accelerator.h
index e29f9aaa69344014aa6a94692a838ac119e410b8..7fb4d5f856926e2559d2743145f6781fad68b8d5 100644
--- a/chrome/gpu/arc_gpu_video_decode_accelerator.h
+++ b/chrome/gpu/arc_gpu_video_decode_accelerator.h
@@ -42,7 +42,8 @@ class ArcGpuVideoDecodeAccelerator
                         size_t length) override;
   void BindDmabuf(PortType port,
                   uint32_t index,
-                  base::ScopedFD dmabuf_fd) override;
+                  base::ScopedFD dmabuf_fd,
+                  int32_t stride) override;
   void UseBuffer(PortType port,
                  uint32_t index,
                  const BufferMetadata& metadata) override;
@@ -78,14 +79,28 @@ class ArcGpuVideoDecodeAccelerator
     // The file handle to access the buffer. It is owned by this class and
     // should be closed after use.
     base::ScopedFD handle;
-    off_t offset;
-    size_t length;
+
+    // The offset of the payload to the beginning of the shared memory.
+    off_t offset = 0;
+
+    // The length of the payload.

[Pawel Osciak, 2016/05/11 01:53:57]

size of the payload in bytes.

+    size_t length = 0;
 
     InputBufferInfo();
     InputBufferInfo(InputBufferInfo&& other);
     ~InputBufferInfo();
   };
 
+  // The information about the dmabuf used as an output buffer.
+  struct OutputBufferInfo {
+    base::ScopedFD handle;
+    int32_t stride = 0;  // In bytes.
+
+    OutputBufferInfo();
+    OutputBufferInfo(OutputBufferInfo&& other);
+    ~OutputBufferInfo();
+  };
+
   // Helper function to Send the end-of-stream output buffer if
   // |pending_eos_output_buffer_| is true, or reuse the picture in ArcVDA.
   void SendEosIfNeededOrReusePicture(uint32_t index);
@@ -133,10 +148,10 @@ class ArcGpuVideoDecodeAccelerator
   // The details of the shared memory of each input buffers.
   std::vector<InputBufferInfo> input_buffer_info_;
 
-  // To keep those output buffers which have been bound by bindDmabuf() but not
-  // be used yet. Will call VDA::ImportBufferForPicture() when those buffers are
-  // used for the first time.
-  std::vector<base::ScopedFD> buffers_pending_import_;
+  // To keep those output buffers which have been bound by bindDmabuf() but
+  // haven't been passed to VDA yet. Will call VDA::ImportBufferForPicture()
+  // when those buffers are used for the first time.
+  std::vector<OutputBufferInfo> buffers_pending_import_;
 
   base::ThreadChecker thread_checker_;
   size_t output_buffer_size_;