content/common/gpu/client/gpu_jpeg_decode_accelerator_host.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/common/gpu/client/gpu_jpeg_decode_accelerator_host.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/memory/shared_memory_handle.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/synchronization/waitable_event.h"
  12 #include "content/common/gpu/client/gpu_channel_host.h"
  13 #include "content/common/gpu/gpu_messages.h"
  14 #include "ipc/ipc_listener.h"
  15 #include "ipc/ipc_message_macros.h"
  16 #include "ipc/ipc_message_utils.h"
  17
  18 namespace content {
  19
  20 // Class to receive AcceleratedJpegDecoderHostMsg_DecodeAck IPC message on IO
  21 // thread. This does very similar what MessageFilter usually does. It is not
  22 // MessageFilter because GpuChannelHost doesn't support AddFilter.
  23 class GpuJpegDecodeAcceleratorHost::Receiver : public IPC::Listener,
  24                                                public base::NonThreadSafe {
  25  public:
  26   Receiver(Client* client,
  27            const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
  28       : client_(client),
  29         io_task_runner_(io_task_runner),
  30         weak_factory_for_io_(this) {
  31     DCHECK(CalledOnValidThread());
  32   }
  33
  34   ~Receiver() override { DCHECK(CalledOnValidThread()); }
  35
  36   void InvalidateWeakPtr(base::WaitableEvent* event) {
  37     DCHECK(io_task_runner_->BelongsToCurrentThread());
  38     weak_factory_for_io_.InvalidateWeakPtrs();
  39     event->Signal();
  40   }
  41
  42   // IPC::Listener implementation.
  43   void OnChannelError() override {
  44     DCHECK(io_task_runner_->BelongsToCurrentThread());
  45
  46     OnDecodeAck(kInvalidBitstreamBufferId, PLATFORM_FAILURE);
  47   }
  48
  49   bool OnMessageReceived(const IPC::Message& msg) override {
  50     DCHECK(io_task_runner_->BelongsToCurrentThread());
  51
  52     bool handled = true;
  53     IPC_BEGIN_MESSAGE_MAP(GpuJpegDecodeAcceleratorHost::Receiver, msg)
  54     IPC_MESSAGE_HANDLER(AcceleratedJpegDecoderHostMsg_DecodeAck, OnDecodeAck)
  55     IPC_MESSAGE_UNHANDLED(handled = false)
  56     IPC_END_MESSAGE_MAP()
  57     DCHECK(handled);
  58     return handled;
  59   }
  60
  61   base::WeakPtr<IPC::Listener> AsWeakPtrForIO() {
  62     return weak_factory_for_io_.GetWeakPtr();
  63   }
  64
  65  private:
  66   void OnDecodeAck(int32_t bitstream_buffer_id, Error error) {
  67     DCHECK(io_task_runner_->BelongsToCurrentThread());
  68
  69     if (!client_)
  70       return;
  71
  72     if (error == media::JpegDecodeAccelerator::NO_ERRORS) {
  73       client_->VideoFrameReady(bitstream_buffer_id);
  74     } else {
  75       // Only NotifyError once.
  76       // Client::NotifyError() may trigger deletion of |this| (on another
  77       // thread), so calling it needs to be the last thing done on this stack!
  78       media::JpegDecodeAccelerator::Client* client = nullptr;
  79       std::swap(client, client_);
  80       client->NotifyError(bitstream_buffer_id, error);
  81     }
  82   }
  83
  84   Client* client_;
  85
  86   // GPU IO task runner.
  87   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
  88
  89   // Weak pointers will be invalidated on IO thread.
  90   base::WeakPtrFactory<Receiver> weak_factory_for_io_;
  91
  92   DISALLOW_COPY_AND_ASSIGN(Receiver);
  93 };
  94
  95 GpuJpegDecodeAcceleratorHost::GpuJpegDecodeAcceleratorHost(
  96     GpuChannelHost* channel,
  97     int32 route_id,
  98     const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
  99     : channel_(channel),
 100       decoder_route_id_(route_id),
 101       io_task_runner_(io_task_runner) {
 102   DCHECK(channel_);
 103   DCHECK_NE(decoder_route_id_, MSG_ROUTING_NONE);
 104 }
 105
 106 GpuJpegDecodeAcceleratorHost::~GpuJpegDecodeAcceleratorHost() {
 107   DCHECK(CalledOnValidThread());
 108   Send(new AcceleratedJpegDecoderMsg_Destroy(decoder_route_id_));
 109
 110   channel_->RemoveRoute(decoder_route_id_);
 111
 112   // Invalidate weak ptr of |receiver_|. After that, no more messages will be
 113   // routed to |receiver_| on IO thread.
 114   base::WaitableEvent event(false, false);
 115   io_task_runner_->PostTask(
 116       FROM_HERE,
 117       base::Bind(&Receiver::InvalidateWeakPtr,
 118                  base::Unretained(receiver_.get()), base::Unretained(&event)));
 119   event.Wait();
 120 }
 121
 122 bool GpuJpegDecodeAcceleratorHost::Initialize(
 123     media::JpegDecodeAccelerator::Client* client) {
 124   DCHECK(CalledOnValidThread());
 125
 126   bool succeeded = false;
 127   // This cannot be on IO thread because the msg is synchronous.
 128   Send(new GpuMsg_CreateJpegDecoder(decoder_route_id_, &succeeded));
 129
 130   if (!succeeded) {
 131     DLOG(ERROR) << "Send(GpuMsg_CreateJpegDecoder()) failed";
 132     return false;
 133   }
 134
 135   receiver_.reset(new Receiver(client, io_task_runner_));
 136
 137   return true;
 138 }
 139
 140 void GpuJpegDecodeAcceleratorHost::Decode(
 141     const media::BitstreamBuffer& bitstream_buffer,
 142     const scoped_refptr<media::VideoFrame>& video_frame) {
 143   DCHECK(CalledOnValidThread());
 144
 145   DCHECK(
 146       base::SharedMemory::IsHandleValid(video_frame->shared_memory_handle()));
 147
 148   base::SharedMemoryHandle input_handle =
 149       channel_->ShareToGpuProcess(bitstream_buffer.handle());
 150   if (!base::SharedMemory::IsHandleValid(input_handle)) {
 151     DLOG(ERROR) << "Failed to duplicate handle of BitstreamBuffer";
 152     return;
 153   }
 154   base::SharedMemoryHandle output_handle =
 155       channel_->ShareToGpuProcess(video_frame->shared_memory_handle());
 156   if (!base::SharedMemory::IsHandleValid(output_handle)) {
 157     DLOG(ERROR) << "Failed to duplicate handle of VideoFrame";
 158 #if defined(OS_POSIX) && !(defined(OS_MACOSX) && !defined(OS_IOS))
 159     if (input_handle.auto_close) {
 160       // Defer closing task to the ScopedFD.
 161       base::ScopedFD(input_handle.fd);
 162     }
 163 #else
 164     // TODO(kcwu) fix the handle leak after crbug.com/493414 resolved.
 165 #endif
 166     return;
 167   }
 168
 169   size_t output_buffer_size = media::VideoFrame::AllocationSize(
 170       video_frame->format(), video_frame->coded_size());
 171
 172   AcceleratedJpegDecoderMsg_Decode_Params decode_params;
 173   decode_params.coded_size = video_frame->coded_size();
 174   decode_params.input_buffer_id = bitstream_buffer.id();
 175   decode_params.input_buffer_handle = input_handle;
 176   decode_params.input_buffer_size = bitstream_buffer.size();
 177   decode_params.output_video_frame_handle = output_handle;
 178   decode_params.output_buffer_size = output_buffer_size;
 179   Send(new AcceleratedJpegDecoderMsg_Decode(decoder_route_id_, decode_params));
 180 }
 181
 182 void GpuJpegDecodeAcceleratorHost::Send(IPC::Message* message) {
 183   DCHECK(CalledOnValidThread());
 184
 185   if (!channel_->Send(message)) {
 186     DLOG(ERROR) << "Send(" << message->type() << ") failed";
 187   }
 188 }
 189
 190 base::WeakPtr<IPC::Listener> GpuJpegDecodeAcceleratorHost::GetReceiver() {
 191   return receiver_->AsWeakPtrForIO();
 192 }
 193
 194 }  // namespace content