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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
// Copyright 2020 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 "media/gpu/chromeos/vda_video_frame_pool.h"
#include "base/bind.h"
#include "base/memory/scoped_refptr.h"
#include "base/synchronization/waitable_event.h"
#include "media/gpu/chromeos/gpu_buffer_layout.h"
#include "media/gpu/macros.h"
namespace media {
VdaVideoFramePool::VdaVideoFramePool(
base::WeakPtr<VdaDelegate> vda,
scoped_refptr<base::SequencedTaskRunner> vda_task_runner)
: vda_(std::move(vda)), vda_task_runner_(std::move(vda_task_runner)) {
DVLOGF(3);
DETACH_FROM_SEQUENCE(parent_sequence_checker_);
weak_this_ = weak_this_factory_.GetWeakPtr();
}
VdaVideoFramePool::~VdaVideoFramePool() {
DVLOGF(3);
DCHECK_CALLED_ON_VALID_SEQUENCE(parent_sequence_checker_);
weak_this_factory_.InvalidateWeakPtrs();
}
absl::optional<GpuBufferLayout> VdaVideoFramePool::Initialize(
const Fourcc& fourcc,
const gfx::Size& coded_size,
const gfx::Rect& visible_rect,
const gfx::Size& natural_size,
size_t max_num_frames,
bool use_protected) {
DVLOGF(3);
DCHECK_CALLED_ON_VALID_SEQUENCE(parent_sequence_checker_);
if (use_protected) {
LOG(ERROR) << "Cannot allocated protected buffers for VDA";
return absl::nullopt;
}
visible_rect_ = visible_rect;
natural_size_ = natural_size;
if (max_num_frames_ == max_num_frames && fourcc_ && *fourcc_ == fourcc &&
coded_size_ == coded_size) {
DVLOGF(3) << "Arguments related to frame layout are not changed, skip.";
return layout_;
}
// Invalidate weak pointers so the re-import callbacks of the frames we are
// about to stop managing do not run and add them back to us.
weak_this_factory_.InvalidateWeakPtrs();
weak_this_ = weak_this_factory_.GetWeakPtr();
max_num_frames_ = max_num_frames;
fourcc_ = fourcc;
coded_size_ = coded_size;
// Clear the pool and reset the layout to prevent previous frames are recycled
// back to the pool.
frame_pool_ = {};
layout_ = absl::nullopt;
// Receive the layout from the callback. |layout_| is accessed on
// |parent_task_runner_| except OnRequestFramesDone(). However, we block
// |parent_task_runner_| until OnRequestFramesDone() returns. So we don't need
// a lock to protect |layout_|.
// Also it's safe to use base::Unretained() here because we block here, |this|
// must be alive during the callback.
base::WaitableEvent done;
vda_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&VdaDelegate::RequestFrames, vda_, fourcc, coded_size,
visible_rect, max_num_frames,
base::BindOnce(&VdaVideoFramePool::OnRequestFramesDone,
base::Unretained(this), &done),
base::BindRepeating(&VdaVideoFramePool::ImportFrameThunk,
parent_task_runner_, weak_this_)));
done.Wait();
return layout_;
}
void VdaVideoFramePool::OnRequestFramesDone(
base::WaitableEvent* done,
absl::optional<GpuBufferLayout> layout) {
DVLOGF(3);
// RequestFrames() is blocked on |parent_task_runner_| to wait for this method
// finishes, so this method must not be run on the same sequence.
DCHECK(!parent_task_runner_->RunsTasksInCurrentSequence());
DCHECK(fourcc_);
if (!layout || layout->fourcc() != *fourcc_ ||
layout->size().height() < coded_size_.height() ||
layout->size().width() < coded_size_.width()) {
layout_ = absl::nullopt;
} else {
layout_ = layout;
}
done->Signal();
}
// static
void VdaVideoFramePool::ImportFrameThunk(
scoped_refptr<base::SequencedTaskRunner> task_runner,
absl::optional<base::WeakPtr<VdaVideoFramePool>> weak_this,
scoped_refptr<VideoFrame> frame) {
DVLOGF(3);
DCHECK(weak_this);
task_runner->PostTask(
FROM_HERE, base::BindOnce(&VdaVideoFramePool::ImportFrame, *weak_this,
std::move(frame)));
}
void VdaVideoFramePool::ImportFrame(scoped_refptr<VideoFrame> frame) {
DVLOGF(3);
DCHECK_CALLED_ON_VALID_SEQUENCE(parent_sequence_checker_);
if (!layout_ || layout_->fourcc().ToVideoPixelFormat() != frame->format() ||
layout_->size() != frame->coded_size() ||
layout_->modifier() != frame->layout().modifier()) {
return;
}
frame_pool_.push(std::move(frame));
CallFrameAvailableCbIfNeeded();
}
scoped_refptr<VideoFrame> VdaVideoFramePool::GetFrame() {
DVLOGF(3);
DCHECK_CALLED_ON_VALID_SEQUENCE(parent_sequence_checker_);
if (IsExhausted())
return nullptr;
scoped_refptr<VideoFrame> origin_frame = std::move(frame_pool_.front());
frame_pool_.pop();
// Update visible_rect and natural_size.
scoped_refptr<VideoFrame> wrapped_frame = VideoFrame::WrapVideoFrame(
origin_frame, origin_frame->format(), visible_rect_, natural_size_);
DCHECK(wrapped_frame);
wrapped_frame->AddDestructionObserver(
base::BindOnce(&VdaVideoFramePool::ImportFrameThunk, parent_task_runner_,
weak_this_, std::move(origin_frame)));
return wrapped_frame;
}
bool VdaVideoFramePool::IsExhausted() {
DVLOGF(4);
DCHECK_CALLED_ON_VALID_SEQUENCE(parent_sequence_checker_);
return frame_pool_.empty();
}
void VdaVideoFramePool::NotifyWhenFrameAvailable(base::OnceClosure cb) {
DVLOGF(4);
DCHECK_CALLED_ON_VALID_SEQUENCE(parent_sequence_checker_);
frame_available_cb_ = std::move(cb);
CallFrameAvailableCbIfNeeded();
}
void VdaVideoFramePool::CallFrameAvailableCbIfNeeded() {
DVLOGF(4);
DCHECK_CALLED_ON_VALID_SEQUENCE(parent_sequence_checker_);
if (frame_available_cb_ && !IsExhausted())
parent_task_runner_->PostTask(FROM_HERE, std::move(frame_available_cb_));
}
} // namespace media
|
