MJPEG acceleration for video capture using VAAPI

content/browser/renderer_host/media/video_capture_buffer_pool.cc

 // Copyright (c) 2013 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_buffer_pool.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 27 matching lines @@
     return base::SharedMemory::NULLHandle();
   }
   base::SharedMemoryHandle remote_handle;
   buffer->shared_memory.ShareToProcess(process_handle, &remote_handle);
   *memory_size = buffer->shared_memory.requested_size();
   return remote_handle;
 }
 
 bool VideoCaptureBufferPool::GetBufferInfo(int buffer_id,
                                            void** memory,
-                                           size_t* size) {
+                                           size_t* size,
+                                           base::SharedMemoryHandle* handle) {
   base::AutoLock lock(lock_);
 
   Buffer* buffer = GetBuffer(buffer_id);
   if (!buffer) {
     NOTREACHED() << "Invalid buffer_id.";
     return false;
   }
 
   DCHECK(buffer->held_by_producer);
   *memory = buffer->shared_memory.memory();
   *size = buffer->shared_memory.mapped_size();
+  *handle = buffer->shared_memory.handle();
   return true;
 }
 
 int VideoCaptureBufferPool::ReserveForProducer(size_t size,
                                                int* buffer_id_to_drop) {
   base::AutoLock lock(lock_);
   return ReserveForProducerInternal(size, buffer_id_to_drop);
 }
 
 void VideoCaptureBufferPool::RelinquishProducerReservation(int buffer_id) {
@@ skipping 92 matching lines @@
 
 VideoCaptureBufferPool::Buffer* VideoCaptureBufferPool::GetBuffer(
     int buffer_id) {
   BufferMap::iterator it = buffers_.find(buffer_id);
   if (it == buffers_.end())
     return NULL;
   return it->second;
 }
 
 }  // namespace content