[NotForReview] Convert accelerated JPEG Decoder IPC to Mojo

content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc

 // Copyright 2015 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_gpu_jpeg_decoder.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_switches.h"
 #include "media/base/media_switches.h"
 #include "media/base/video_frame.h"
 #include "media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.h"
 #include "mojo/public/cpp/system/platform_handle.h"
 
 namespace content {
 
 VideoCaptureGpuJpegDecoder::VideoCaptureGpuJpegDecoder(
     DecodeDoneCB decode_done_cb,
     base::Callback<void(const std::string&)> send_log_message_cb)
     : decode_done_cb_(std::move(decode_done_cb)),
       send_log_message_cb_(std::move(send_log_message_cb)),
       has_received_decoded_frame_(false),
       next_bitstream_buffer_id_(0),
       in_buffer_id_(media::JpegDecodeAccelerator::kInvalidBitstreamBufferId),
       decoder_status_(INIT_PENDING) {}
 
 VideoCaptureGpuJpegDecoder::~VideoCaptureGpuJpegDecoder() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   // |decoder_| guarantees no more JpegDecodeAccelerator::Client callbacks
   // on IO thread after deletion.
   decoder_.reset();
-
-  // |gpu_channel_host_| should outlive |decoder_|, so |gpu_channel_host_|
-  // must be released after |decoder_| has been destroyed.
-  gpu_channel_host_ = nullptr;
 }
 
 void VideoCaptureGpuJpegDecoder::Initialize() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   base::AutoLock lock(lock_);
   bool is_platform_supported =
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kUseFakeJpegDecodeAccelerator);
 #if defined(OS_CHROMEOS)
   // Non-ChromeOS platforms do not support HW JPEG decode now. Do not establish
   // gpu channel to avoid introducing overhead.
   is_platform_supported = true;
 #endif
 
   if (!is_platform_supported ||
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableAcceleratedMjpegDecode)) {
     decoder_status_ = FAILED;
     RecordInitDecodeUMA_Locked();
     return;
   }
 
-  const scoped_refptr<base::SingleThreadTaskRunner> current_task_runner(
-      base::ThreadTaskRunnerHandle::Get());
-  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-                          base::Bind(&EstablishGpuChannelOnUIThread,
-                                     current_task_runner, AsWeakPtr()));
+  if (GpuDataManager::GetInstance()
+          ->GetGPUInfo()
+          .jpeg_decode_accelerator_supported) {
+    auto decoder = base::MakeUnique<media::GpuJpegDecodeAcceleratorHost>(
+        BrowserGpuChannelHostFactory::instance()->GetIOThreadTaskRunner());
+    if (decoder->Initialize(this)) {
+      decoder_ = std::move(decoder);
+    } else {
+      DLOG(ERROR) << "Failed to initialize JPEG decoder";
+    }
+  }
+
+  decoder_status_ = decoder_ ? INIT_PASSED : FAILED;
+  RecordInitDecodeUMA_Locked();
 }
 
 VideoCaptureGpuJpegDecoder::STATUS VideoCaptureGpuJpegDecoder::GetStatus()
     const {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   base::AutoLock lock(lock_);
   return decoder_status_;
 }
 
 void VideoCaptureGpuJpegDecoder::DecodeCapturedData(
@@ skipping 123 matching lines @@
     media::JpegDecodeAccelerator::Error error) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   LOG(ERROR) << "Decode error, bitstream_buffer_id=" << bitstream_buffer_id
              << ", error=" << error;
   send_log_message_cb_.Run("Gpu Jpeg decoder failed");
   base::AutoLock lock(lock_);
   decode_done_closure_.Reset();
   decoder_status_ = FAILED;
 }
 
-// static
-void VideoCaptureGpuJpegDecoder::EstablishGpuChannelOnUIThread(
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-    base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  DCHECK(BrowserGpuChannelHostFactory::instance());
-
-  BrowserGpuChannelHostFactory::instance()->EstablishGpuChannel(
-      base::Bind(&VideoCaptureGpuJpegDecoder::GpuChannelEstablishedOnUIThread,
-                 task_runner, weak_this));
-}
-
-// static
-void VideoCaptureGpuJpegDecoder::GpuChannelEstablishedOnUIThread(
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-    base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this,
-    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-
-  task_runner->PostTask(
-      FROM_HERE, base::Bind(&VideoCaptureGpuJpegDecoder::FinishInitialization,
-                            weak_this, std::move(gpu_channel_host)));
-}
-
-void VideoCaptureGpuJpegDecoder::FinishInitialization(
-    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host) {
-  TRACE_EVENT0("gpu", "VideoCaptureGpuJpegDecoder::FinishInitialization");
-  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
-  base::AutoLock lock(lock_);
-  if (!gpu_channel_host) {
-    LOG(ERROR) << "Failed to establish GPU channel for JPEG decoder";
-  } else if (gpu_channel_host->gpu_info().jpeg_decode_accelerator_supported) {
-    gpu_channel_host_ = std::move(gpu_channel_host);
-    scoped_refptr<base::SingleThreadTaskRunner> io_task_runner =
-        BrowserGpuChannelHostFactory::instance()->GetIOThreadTaskRunner();
-
-    int32_t route_id = gpu_channel_host_->GenerateRouteID();
-    std::unique_ptr<media::GpuJpegDecodeAcceleratorHost> decoder(
-        new media::GpuJpegDecodeAcceleratorHost(gpu_channel_host_.get(),
-                                                route_id, io_task_runner));
-    if (decoder->Initialize(this)) {
-      gpu_channel_host_->AddRouteWithTaskRunner(
-          route_id, decoder->GetReceiver(), io_task_runner);
-      decoder_ = std::move(decoder);
-    } else {
-      DLOG(ERROR) << "Failed to initialize JPEG decoder";
-    }
-  }
-  decoder_status_ = decoder_ ? INIT_PASSED : FAILED;
-  RecordInitDecodeUMA_Locked();
-}
-
 bool VideoCaptureGpuJpegDecoder::IsDecoding_Locked() const {
   lock_.AssertAcquired();
   return !decode_done_closure_.is_null();
 }
 
 void VideoCaptureGpuJpegDecoder::RecordInitDecodeUMA_Locked() {
   UMA_HISTOGRAM_BOOLEAN("Media.VideoCaptureGpuJpegDecoder.InitDecodeSuccess",
                         decoder_status_ == INIT_PASSED);
 }
 
 }  // namespace content