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
|
// Copyright 2014 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/cast/sender/fake_software_video_encoder.h"
#include <stddef.h>
#include "base/json/json_writer.h"
#include "base/values.h"
#include "media/base/video_frame.h"
#include "media/cast/common/rtp_time.h"
#include "media/cast/constants.h"
#ifndef OFFICIAL_BUILD
namespace media {
namespace cast {
FakeSoftwareVideoEncoder::FakeSoftwareVideoEncoder(
const VideoSenderConfig& video_config)
: video_config_(video_config),
next_frame_is_key_(true),
frame_id_(0),
frame_size_(0) {
}
FakeSoftwareVideoEncoder::~FakeSoftwareVideoEncoder() {}
void FakeSoftwareVideoEncoder::Initialize() {}
void FakeSoftwareVideoEncoder::Encode(
const scoped_refptr<media::VideoFrame>& video_frame,
const base::TimeTicks& reference_time,
SenderEncodedFrame* encoded_frame) {
DCHECK(encoded_frame);
if (video_frame->visible_rect().size() != last_frame_size_) {
next_frame_is_key_ = true;
last_frame_size_ = video_frame->visible_rect().size();
}
encoded_frame->frame_id = frame_id_++;
if (next_frame_is_key_) {
encoded_frame->dependency = EncodedFrame::KEY;
encoded_frame->referenced_frame_id = encoded_frame->frame_id;
next_frame_is_key_ = false;
} else {
encoded_frame->dependency = EncodedFrame::DEPENDENT;
encoded_frame->referenced_frame_id = encoded_frame->frame_id - 1;
}
encoded_frame->rtp_timestamp =
RtpTimeTicks::FromTimeDelta(video_frame->timestamp(), kVideoFrequency);
encoded_frame->reference_time = reference_time;
base::DictionaryValue values;
values.SetBoolean("key",
encoded_frame->dependency == EncodedFrame::KEY);
values.SetInteger("ref", encoded_frame->referenced_frame_id);
values.SetInteger("id", encoded_frame->frame_id);
values.SetInteger("size", frame_size_);
base::JSONWriter::Write(values, &encoded_frame->data);
encoded_frame->data.resize(
std::max<size_t>(encoded_frame->data.size(), frame_size_), ' ');
if (encoded_frame->dependency == EncodedFrame::KEY) {
encoded_frame->deadline_utilization = 1.0;
encoded_frame->lossy_utilization = 6.0;
} else {
encoded_frame->deadline_utilization = 0.8;
encoded_frame->lossy_utilization = 0.8;
}
}
void FakeSoftwareVideoEncoder::UpdateRates(uint32_t new_bitrate) {
frame_size_ = new_bitrate / video_config_.max_frame_rate / 8;
}
void FakeSoftwareVideoEncoder::GenerateKeyFrame() {
next_frame_is_key_ = true;
}
} // namespace cast
} // namespace media
#endif
|
