1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
// Copyright 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.
#ifndef CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_
#define CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "content/common/gpu/gpu_command_buffer_stub.h"
#include "ipc/ipc_listener.h"
#include "media/video/video_encode_accelerator.h"
#include "ui/gfx/size.h"
namespace base {
class SharedMemory;
} // namespace base
namespace content {
// This class encapsulates the GPU process view of a VideoEncodeAccelerator,
// wrapping the platform-specific VideoEncodeAccelerator instance. It handles
// IPC coming in from the renderer and passes it to the underlying VEA.
class GpuVideoEncodeAccelerator
: public IPC::Listener,
public media::VideoEncodeAccelerator::Client,
public GpuCommandBufferStub::DestructionObserver {
public:
GpuVideoEncodeAccelerator(int32 host_route_id, GpuCommandBufferStub* stub);
virtual ~GpuVideoEncodeAccelerator();
// Initialize this accelerator with the given parameters and send
// |init_done_msg| when complete.
void Initialize(media::VideoFrame::Format input_format,
const gfx::Size& input_visible_size,
media::VideoCodecProfile output_profile,
uint32 initial_bitrate,
IPC::Message* init_done_msg);
// IPC::Listener implementation
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
// media::VideoEncodeAccelerator::Client implementation.
virtual void RequireBitstreamBuffers(unsigned int input_count,
const gfx::Size& input_coded_size,
size_t output_buffer_size) OVERRIDE;
virtual void BitstreamBufferReady(int32 bitstream_buffer_id,
size_t payload_size,
bool key_frame) OVERRIDE;
virtual void NotifyError(media::VideoEncodeAccelerator::Error error) OVERRIDE;
// GpuCommandBufferStub::DestructionObserver implementation.
virtual void OnWillDestroyStub() OVERRIDE;
// Static query for supported profiles. This query calls the appropriate
// platform-specific version.
static std::vector<media::VideoEncodeAccelerator::SupportedProfile>
GetSupportedProfiles();
private:
// Create the appropriate platform-specific VEA.
static scoped_ptr<media::VideoEncodeAccelerator> CreateEncoder();
// IPC handlers, proxying media::VideoEncodeAccelerator for the renderer
// process.
void OnEncode(int32 frame_id,
base::SharedMemoryHandle buffer_handle,
uint32 buffer_size,
bool force_keyframe);
void OnUseOutputBitstreamBuffer(int32 buffer_id,
base::SharedMemoryHandle buffer_handle,
uint32 buffer_size);
void OnRequestEncodingParametersChange(uint32 bitrate, uint32 framerate);
void OnDestroy();
void EncodeFrameFinished(int32 frame_id, scoped_ptr<base::SharedMemory> shm);
void Send(IPC::Message* message);
// Helper for replying to the creation request.
void SendCreateEncoderReply(IPC::Message* message, bool succeeded);
// Route ID to communicate with the host.
int32 host_route_id_;
// Unowned pointer to the underlying GpuCommandBufferStub. |this| is
// registered as a DestuctionObserver of |stub_| and will self-delete when
// |stub_| is destroyed.
GpuCommandBufferStub* stub_;
// Owned pointer to the underlying VideoEncodeAccelerator.
scoped_ptr<media::VideoEncodeAccelerator> encoder_;
base::Callback<bool(void)> make_context_current_;
// Video encoding parameters.
media::VideoFrame::Format input_format_;
gfx::Size input_visible_size_;
gfx::Size input_coded_size_;
size_t output_buffer_size_;
// Weak pointer for media::VideoFrames that refer back to |this|.
base::WeakPtrFactory<GpuVideoEncodeAccelerator> weak_this_factory_;
DISALLOW_COPY_AND_ASSIGN(GpuVideoEncodeAccelerator);
};
} // namespace content
#endif // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_
|
