MJPEG acceleration for video capture using VAAPI, the GPU and IPC part

content/common/gpu/gpu_channel.cc

 // Copyright (c) 2012 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.
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "content/common/gpu/gpu_channel.h"
 
@@ skipping 648 matching lines @@
   gpu_channel_manager_->RemoveChannel(client_id_);
 }
 
 bool GpuChannel::OnControlMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(GpuChannel, msg)
     IPC_MESSAGE_HANDLER(GpuChannelMsg_CreateOffscreenCommandBuffer,
                         OnCreateOffscreenCommandBuffer)
     IPC_MESSAGE_HANDLER(GpuChannelMsg_DestroyCommandBuffer,
                         OnDestroyCommandBuffer)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuMsg_CreateJpegDecoder,
+                                    OnCreateJpegDecoder)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   DCHECK(handled) << msg.type();
   return handled;
 }
 
 void GpuChannel::HandleMessage() {
   handle_messages_scheduled_ = false;
   if (deferred_messages_.empty())
     return;
@@ skipping 101 matching lines @@
   router_.RemoveRoute(route_id);
   stubs_.Remove(route_id);
   // In case the renderer is currently blocked waiting for a sync reply from the
   // stub, we need to make sure to reschedule the GpuChannel here.
   if (need_reschedule) {
     // This stub won't get a chance to reschedule, so update the count now.
     StubSchedulingChanged(true);
   }
 }
 
+void GpuChannel::OnCreateJpegDecoder(int32 route_id, IPC::Message* reply_msg) {
+  if (!jpeg_decoder_) {
+    jpeg_decoder_.reset(new GpuJpegDecodeAccelerator(this, io_task_runner_));
+  }
+  jpeg_decoder_->AddClient(route_id, reply_msg);
+}
+
+#if 0
+void GpuChannel::ReleaseJpegDecoder(int32 route_id) {
+  jpeg_decoder_.reset();
+  DCHECK(jpeg_decoder_map_.get(route_id));
+  jpeg_decoder_map_.erase(route_id);
+}
+#endif

[piman, 2015/05/26 23:31:53]

nit: remove

[kcwu, 2015/05/27 14:13:23]

Done.

+
 void GpuChannel::MessageProcessed() {
   messages_processed_++;
   if (preempting_flag_.get()) {
     io_task_runner_->PostTask(
         FROM_HERE, base::Bind(&GpuChannelMessageFilter::MessageProcessed,
                               filter_, messages_processed_));
   }
 }
 
 void GpuChannel::CacheShader(const std::string& key,
@@ skipping 48 matching lines @@
     }
   }
 }
 
 void GpuChannel::HandleUpdateValueState(
     unsigned int target, const gpu::ValueState& state) {
   pending_valuebuffer_state_->UpdateState(target, state);
 }
 
 }  // namespace content