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
|
// Copyright (c) 2010 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 "remoting/base/encoder_verbatim.h"
#include "base/logging.h"
#include "gfx/rect.h"
#include "media/base/data_buffer.h"
#include "remoting/base/capture_data.h"
#include "remoting/base/util.h"
namespace remoting {
// TODO(garykac): Move up into shared location. Share value with encoder_zlib.
// TODO(garykac): 10* is added to ensure that rects fit in a single packet.
// Add support for splitting across packets and remove the 10*.
static const int kPacketSize = 10 * 1024 * 1024;
using media::DataBuffer;
EncoderVerbatim::EncoderVerbatim()
: packet_size_(kPacketSize) {
}
EncoderVerbatim::EncoderVerbatim(int packet_size)
: packet_size_(packet_size) {
}
void EncoderVerbatim::Encode(scoped_refptr<CaptureData> capture_data,
bool key_frame,
DataAvailableCallback* data_available_callback) {
capture_data_ = capture_data;
callback_.reset(data_available_callback);
const InvalidRects& rects = capture_data->dirty_rects();
int index = 0;
for (InvalidRects::const_iterator r = rects.begin();
r != rects.end(); ++r, ++index) {
EncodeRect(*r, index);
}
capture_data_ = NULL;
callback_.reset();
}
// TODO(garykac): This assumes that the rect fits into a single packet.
// Fix this by modeling after code in encoder_zlib.cc
void EncoderVerbatim::EncodeRect(const gfx::Rect& rect, size_t rect_index) {
CHECK(capture_data_->data_planes().data[0]);
const int stride = capture_data_->data_planes().strides[0];
const int bytes_per_pixel = GetBytesPerPixel(capture_data_->pixel_format());
const int row_size = bytes_per_pixel * rect.width();
VideoPacket* packet = new VideoPacket();
PrepareUpdateStart(rect, packet);
const uint8* in = capture_data_->data_planes().data[0] +
rect.y() * stride +
rect.x() * bytes_per_pixel;
// TODO(hclam): Fill in the sequence number.
uint8* out = GetOutputBuffer(packet, packet_size_);
int total_bytes = 0;
for (int y = 0; y < rect.height(); y++) {
memcpy(out, in, row_size);
out += row_size;
in += stride;
total_bytes += row_size;
}
// We have reached the end of stream.
packet->set_flags(packet->flags() | VideoPacket::LAST_PACKET);
// If we have filled the message or we have reached the end of stream.
packet->mutable_data()->resize(total_bytes);
SubmitMessage(packet, rect_index);
}
void EncoderVerbatim::PrepareUpdateStart(const gfx::Rect& rect,
VideoPacket* packet) {
packet->set_flags(packet->flags() | VideoPacket::FIRST_PACKET);
VideoPacketFormat* format = packet->mutable_format();
format->set_x(rect.x());
format->set_y(rect.y());
format->set_width(rect.width());
format->set_height(rect.height());
format->set_encoding(VideoPacketFormat::ENCODING_VERBATIM);
format->set_pixel_format(capture_data_->pixel_format());
}
uint8* EncoderVerbatim::GetOutputBuffer(VideoPacket* packet, size_t size) {
packet->mutable_data()->resize(size);
// TODO(ajwong): Is there a better way to do this at all???
return const_cast<uint8*>(reinterpret_cast<const uint8*>(
packet->mutable_data()->data()));
}
void EncoderVerbatim::SubmitMessage(VideoPacket* packet, size_t rect_index) {
callback_->Run(packet);
}
} // namespace remoting
|