Use PPS/SPS NALUs to initialize a VTDecompressionSession.

content/common/gpu/media/vt_video_decode_accelerator.h

Index: content/common/gpu/media/vt_video_decode_accelerator.h
diff --git a/content/common/gpu/media/vt_video_decode_accelerator.h b/content/common/gpu/media/vt_video_decode_accelerator.h
index 5b5d8be070c194b13095ba5a39a135103cc6a70d..ca4225e564be2692bb9e440d286ef86002685e3e 100644
--- a/content/common/gpu/media/vt_video_decode_accelerator.h
+++ b/content/common/gpu/media/vt_video_decode_accelerator.h
@@ -5,15 +5,19 @@
 #ifndef CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_
 
-#include <stdint.h>
-
+#include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "content/common/gpu/media/vt.h"
+#include "media/filters/h264_parser.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gl/gl_context_cgl.h"
 
+namespace base {
+  class SingleThreadTaskRunner;
+}  // namespace base
+
 namespace content {
 
 // (Stub of a) VideoToolbox.framework implementation of the
@@ -38,15 +42,35 @@ class VTVideoDecodeAccelerator
   virtual void Destroy() OVERRIDE;
   virtual bool CanDecodeOnIOThread() OVERRIDE;
 
+  // Called by VideoToolbox when a frame is decoded.
+  void Output(
+      int32_t bitstream_id,
+      OSStatus status,
+      VTDecodeInfoFlags info_flags,
+      CVImageBufferRef image_buffer);
+
  private:
-  scoped_refptr<base::MessageLoopProxy> loop_proxy_;
+  // Configure a VideoToolbox decompression session from parameter set NALUs.
+  void ConfigureDecoder(
+      const std::vector<const uint8_t*>& nalu_data_ptrs,
+      const std::vector<size_t>& nalu_data_sizes);
+
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   CGLContextObj cgl_context_;
   media::VideoDecodeAccelerator::Client* client_;
+  media::H264Parser parser_;
+
+  // Decoder configuration.
+  VTDecompressionOutputCallbackRecord callback_;
+  CMFormatDescriptionRef format_;
+  VTDecompressionSessionRef session_;
+  int32_t coded_width_;
+  int32_t coded_height_;
 
   // Member variables should appear before the WeakPtrFactory, to ensure
   // that any WeakPtrs to Controller are invalidated before its members
   // variable's destructors are executed, rendering them invalid.
-  base::WeakPtrFactory<VTVideoDecodeAccelerator> weak_this_factory_;
+  base::WeakPtrFactory<VTVideoDecodeAccelerator> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VTVideoDecodeAccelerator);
 };