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Side by Side Diff: remoting/host/video_frame_capturer_fake.cc

Issue 11470028: Move screen capturers to remoting/capturer. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years ago
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1 // Copyright (c) 2012 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 "remoting/host/video_frame_capturer_fake.h"
6
7 #include "base/time.h"
8 #include "remoting/base/capture_data.h"
9
10 namespace remoting {
11
12 // VideoFrameCapturerFake generates a white picture of size kWidth x kHeight
13 // with a rectangle of size kBoxWidth x kBoxHeight. The rectangle moves kSpeed
14 // pixels per frame along both axes, and bounces off the sides of the screen.
15 static const int kWidth = 800;
16 static const int kHeight = 600;
17 static const int kBoxWidth = 140;
18 static const int kBoxHeight = 140;
19 static const int kSpeed = 20;
20
21 COMPILE_ASSERT(kBoxWidth < kWidth && kBoxHeight < kHeight, bad_box_size);
22 COMPILE_ASSERT((kBoxWidth % kSpeed == 0) && (kWidth % kSpeed == 0) &&
23 (kBoxHeight % kSpeed == 0) && (kHeight % kSpeed == 0),
24 sizes_must_be_multiple_of_kSpeed);
25
26 static const int kBytesPerPixel = 4; // 32 bit RGB is 4 bytes per pixel.
27
28 VideoFrameCapturerFake::VideoFrameCapturerFake()
29 : size_(SkISize::Make(0, 0)),
30 bytes_per_row_(0),
31 box_pos_x_(0),
32 box_pos_y_(0),
33 box_speed_x_(kSpeed),
34 box_speed_y_(kSpeed),
35 current_buffer_(0),
36 pixel_format_(media::VideoFrame::RGB32) {
37 ScreenConfigurationChanged();
38 }
39
40 VideoFrameCapturerFake::~VideoFrameCapturerFake() {
41 }
42
43 void VideoFrameCapturerFake::Start(Delegate* delegate) {
44 delegate_ = delegate;
45 }
46
47 void VideoFrameCapturerFake::Stop() {
48 }
49
50 media::VideoFrame::Format VideoFrameCapturerFake::pixel_format() const {
51 return pixel_format_;
52 }
53
54 void VideoFrameCapturerFake::InvalidateRegion(const SkRegion& invalid_region) {
55 helper_.InvalidateRegion(invalid_region);
56 }
57
58 void VideoFrameCapturerFake::CaptureFrame() {
59 base::Time capture_start_time = base::Time::Now();
60
61 GenerateImage();
62 helper_.InvalidateScreen(size_);
63
64 SkRegion invalid_region;
65 helper_.SwapInvalidRegion(&invalid_region);
66
67 DataPlanes planes;
68 planes.data[0] = buffers_[current_buffer_].get();
69 current_buffer_ = (current_buffer_ + 1) % kNumBuffers;
70 planes.strides[0] = bytes_per_row_;
71
72 scoped_refptr<CaptureData> capture_data(new CaptureData(planes,
73 size_,
74 pixel_format_));
75 capture_data->mutable_dirty_region() = invalid_region;
76
77 helper_.set_size_most_recent(capture_data->size());
78
79 capture_data->set_capture_time_ms(
80 (base::Time::Now() - capture_start_time).InMillisecondsRoundedUp());
81 delegate_->OnCaptureCompleted(capture_data);
82 }
83
84 const SkISize& VideoFrameCapturerFake::size_most_recent() const {
85 return helper_.size_most_recent();
86 }
87
88 void VideoFrameCapturerFake::GenerateImage() {
89 memset(buffers_[current_buffer_].get(), 0xff,
90 size_.width() * size_.height() * kBytesPerPixel);
91
92 uint8* row = buffers_[current_buffer_].get() +
93 (box_pos_y_ * size_.width() + box_pos_x_) * kBytesPerPixel;
94
95 box_pos_x_ += box_speed_x_;
96 if (box_pos_x_ + kBoxWidth >= size_.width() || box_pos_x_ == 0)
97 box_speed_x_ = -box_speed_x_;
98
99 box_pos_y_ += box_speed_y_;
100 if (box_pos_y_ + kBoxHeight >= size_.height() || box_pos_y_ == 0)
101 box_speed_y_ = -box_speed_y_;
102
103 // Draw rectangle with the following colors in its corners:
104 // cyan....yellow
105 // ..............
106 // blue.......red
107 for (int y = 0; y < kBoxHeight; ++y) {
108 for (int x = 0; x < kBoxWidth; ++x) {
109 int r = x * 255 / kBoxWidth;
110 int g = y * 255 / kBoxHeight;
111 int b = 255 - (x * 255 / kBoxWidth);
112 row[x * kBytesPerPixel] = r;
113 row[x * kBytesPerPixel+1] = g;
114 row[x * kBytesPerPixel+2] = b;
115 row[x * kBytesPerPixel+3] = 0xff;
116 }
117 row += bytes_per_row_;
118 }
119 }
120
121 void VideoFrameCapturerFake::ScreenConfigurationChanged() {
122 size_ = SkISize::Make(kWidth, kHeight);
123 bytes_per_row_ = size_.width() * kBytesPerPixel;
124 pixel_format_ = media::VideoFrame::RGB32;
125
126 // Create memory for the buffers.
127 int buffer_size = size_.height() * bytes_per_row_;
128 for (int i = 0; i < kNumBuffers; i++) {
129 buffers_[i].reset(new uint8[buffer_size]);
130 }
131 }
132
133 } // namespace remoting
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