MJPEG acceleration for video capture using VAAPI

content/browser/media/capture/web_contents_video_capture_device_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.

[wuchengli, 2015/04/21 06:05:36]

Please provide performance data of HW and SW JPEG decoders in the CL
description.

[kcwu, 2015/05/08 14:42:41]

Done.

 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/media/capture/web_contents_video_capture_device.h"
 
 #include "base/bind_helpers.h"
 #include "base/debug/debugger.h"
 #include "base/run_loop.h"
 #include "base/test/test_timeouts.h"
 #include "base/time/time.h"
@@ skipping 327 matching lines @@
       media::VideoPixelFormat format,
       const gfx::Size& dimensions) override {
     CHECK_EQ(format, media::PIXEL_FORMAT_I420);
     int buffer_id_to_drop = VideoCaptureBufferPool::kInvalidId;  // Ignored.
     int buffer_id = buffer_pool_->ReserveForProducer(format, dimensions,
                                                      &buffer_id_to_drop);
     if (buffer_id == VideoCaptureBufferPool::kInvalidId)
       return NULL;
     void* data;
     size_t size;
-    buffer_pool_->GetBufferInfo(buffer_id, &data, &size);
+    base::SharedMemoryHandle handle;
+    buffer_pool_->GetBufferInfo(buffer_id, &data, &size, &handle);
     return scoped_refptr<media::VideoCaptureDevice::Client::Buffer>(
-        new AutoReleaseBuffer(buffer_pool_, buffer_id, data, size));
+        new AutoReleaseBuffer(buffer_pool_, buffer_id, data, size, handle));
   }
 
   void OnIncomingCapturedVideoFrame(
       const scoped_refptr<Buffer>& buffer,
       const scoped_refptr<media::VideoFrame>& frame,
       const base::TimeTicks& timestamp) override {
     EXPECT_EQ(gfx::Size(kTestWidth, kTestHeight), frame->visible_rect().size());
     EXPECT_EQ(media::VideoFrame::I420, frame->format());
     double frame_rate = 0;
     EXPECT_TRUE(
         frame->metadata()->GetDouble(media::VideoFrameMetadata::FRAME_RATE,
                                      &frame_rate));
     EXPECT_EQ(kTestFramesPerSecond, frame_rate);
     uint8 yuv[3];
     for (int plane = 0; plane < 3; ++plane)
       yuv[plane] = frame->visible_data(plane)[0];
     // TODO(nick): We just look at the first pixel presently, because if
     // the analysis is too slow, the backlog of frames will grow without bound
     // and trouble erupts. http://crbug.com/174519
     color_callback_.Run((SkColorSetRGB(yuv[0], yuv[1], yuv[2])));
   }
 
   void OnError(const std::string& reason) override { error_callback_.Run(); }
 
  private:
   class AutoReleaseBuffer : public media::VideoCaptureDevice::Client::Buffer {
    public:
     AutoReleaseBuffer(const scoped_refptr<VideoCaptureBufferPool>& pool,
-               int buffer_id,
-               void* data,
-               size_t size)
+                      int buffer_id,
+                      void* data,
+                      size_t size,
+                      base::SharedMemoryHandle handle)
         : pool_(pool),
           id_(buffer_id),
           data_(data),
-          size_(size) {
+          size_(size),
+          handle_(handle) {
       DCHECK(pool_.get());
     }
     int id() const override { return id_; }
     void* data() const override { return data_; }
     size_t size() const override { return size_; }
+    base::SharedMemoryHandle handle() const override { return handle_; }
 
    private:
     ~AutoReleaseBuffer() override { pool_->RelinquishProducerReservation(id_); }
 
     const scoped_refptr<VideoCaptureBufferPool> pool_;
     const int id_;
     void* const data_;
     const size_t size_;
+    const base::SharedMemoryHandle handle_;
   };
 
   scoped_refptr<VideoCaptureBufferPool> buffer_pool_;
   base::Callback<void(SkColor)> color_callback_;
   base::Closure error_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(StubClient);
 };
 
 class StubClientObserver {
@@ skipping 457 matching lines @@
   source()->SetSolidColor(SK_ColorGREEN);
   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorGREEN));
   source()->SetSolidColor(SK_ColorRED);
   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorRED));
 
   device()->StopAndDeAllocate();
 }
 
 }  // namespace
 }  // namespace content