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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et ft=cpp : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "VideoEngine.h"
#include "libwebrtcglue/SystemTime.h"
#include "video_engine/desktop_capture_impl.h"
#include "system_wrappers/include/clock.h"
#ifdef WEBRTC_ANDROID
# include "modules/video_capture/video_capture.h"
#endif
#ifdef MOZ_WIDGET_ANDROID
# include "mozilla/jni/Utils.h"
#endif
namespace mozilla::camera {
#undef LOG
#undef LOG_ENABLED
mozilla::LazyLogModule gVideoEngineLog("VideoEngine");
#define LOG(args) MOZ_LOG(gVideoEngineLog, mozilla::LogLevel::Debug, args)
#define LOG_ENABLED() MOZ_LOG_TEST(gVideoEngineLog, mozilla::LogLevel::Debug)
#if defined(ANDROID)
int VideoEngine::SetAndroidObjects() {
LOG(("%s", __PRETTY_FUNCTION__));
JavaVM* const javaVM = mozilla::jni::GetVM();
if (!javaVM || webrtc::SetCaptureAndroidVM(javaVM) != 0) {
LOG(("Could not set capture Android VM"));
return -1;
}
# ifdef WEBRTC_INCLUDE_INTERNAL_VIDEO_RENDER
if (webrtc::SetRenderAndroidVM(javaVM) != 0) {
LOG(("Could not set render Android VM"));
return -1;
}
# endif
return 0;
}
#endif
int32_t VideoEngine::CreateVideoCapture(const char* deviceUniqueIdUTF8) {
LOG(("%s", __PRETTY_FUNCTION__));
MOZ_ASSERT(deviceUniqueIdUTF8);
int32_t id = GenerateId();
LOG(("CaptureDeviceInfo.type=%s id=%d", mCaptureDevInfo.TypeName(), id));
for (auto& it : mCaps) {
if (it.second.VideoCapture() &&
it.second.VideoCapture()->CurrentDeviceName() &&
strcmp(it.second.VideoCapture()->CurrentDeviceName(),
deviceUniqueIdUTF8) == 0) {
mIdMap.emplace(id, it.first);
return id;
}
}
CaptureEntry entry = {-1, nullptr};
if (mCaptureDevInfo.type == CaptureDeviceType::Camera) {
entry = CaptureEntry(
id, webrtc::VideoCaptureFactory::Create(deviceUniqueIdUTF8));
if (entry.VideoCapture()) {
entry.VideoCapture()->SetApplyRotation(true);
}
} else {
#ifndef WEBRTC_ANDROID
# ifdef MOZ_X11
webrtc::VideoCaptureModule* captureModule;
auto type = mCaptureDevInfo.type;
nsresult result = NS_DispatchToMainThread(
media::NewRunnableFrom([&captureModule, id, deviceUniqueIdUTF8,
type]() -> nsresult {
captureModule =
webrtc::DesktopCaptureImpl::Create(id, deviceUniqueIdUTF8, type);
return NS_OK;
}),
nsIEventTarget::DISPATCH_SYNC);
if (result == NS_OK) {
entry = CaptureEntry(
id, rtc::scoped_refptr<webrtc::VideoCaptureModule>(captureModule));
} else {
return -1;
}
# else
entry = CaptureEntry(
id, rtc::scoped_refptr<webrtc::VideoCaptureModule>(
webrtc::DesktopCaptureImpl::Create(id, deviceUniqueIdUTF8,
mCaptureDevInfo.type)));
# endif
#else
MOZ_ASSERT("CreateVideoCapture NO DESKTOP CAPTURE IMPL ON ANDROID" ==
nullptr);
#endif
}
mCaps.emplace(id, std::move(entry));
mIdMap.emplace(id, id);
return id;
}
int VideoEngine::ReleaseVideoCapture(const int32_t id) {
bool found = false;
#ifdef DEBUG
{
auto it = mIdMap.find(id);
MOZ_ASSERT(it != mIdMap.end());
Unused << it;
}
#endif
for (auto& it : mIdMap) {
if (it.first != id && it.second == mIdMap[id]) {
// There are other tracks still using this hardware.
found = true;
}
}
if (!found) {
WithEntry(id, [&found](CaptureEntry& cap) {
cap.mVideoCaptureModule = nullptr;
found = true;
});
MOZ_ASSERT(found);
if (found) {
auto it = mCaps.find(mIdMap[id]);
MOZ_ASSERT(it != mCaps.end());
mCaps.erase(it);
}
}
mIdMap.erase(id);
return found ? 0 : (-1);
}
std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo>
VideoEngine::GetOrCreateVideoCaptureDeviceInfo() {
LOG(("%s", __PRETTY_FUNCTION__));
webrtc::Timestamp currentTime = webrtc::Timestamp::Micros(0);
const char* capDevTypeName =
CaptureDeviceInfo(mCaptureDevInfo.type).TypeName();
if (mDeviceInfo) {
LOG(("Device cache available."));
// Camera cache is invalidated by HW change detection elsewhere
if (mCaptureDevInfo.type == CaptureDeviceType::Camera) {
LOG(("returning cached CaptureDeviceInfo of type %s", capDevTypeName));
return mDeviceInfo;
}
// Screen sharing cache is invalidated after the expiration time
currentTime = WebrtcSystemTime();
LOG(("Checking expiry, fetched current time of: %" PRId64,
currentTime.ms()));
LOG(("device cache expiration is %" PRId64, mExpiryTime.ms()));
if (currentTime <= mExpiryTime) {
LOG(("returning cached CaptureDeviceInfo of type %s", capDevTypeName));
return mDeviceInfo;
}
}
if (currentTime.IsZero()) {
currentTime = WebrtcSystemTime();
LOG(("Fetched current time of: %" PRId64, currentTime.ms()));
}
mExpiryTime = currentTime + webrtc::TimeDelta::Millis(kCacheExpiryPeriodMs);
LOG(("new device cache expiration is %" PRId64, mExpiryTime.ms()));
LOG(("creating a new VideoCaptureDeviceInfo of type %s", capDevTypeName));
switch (mCaptureDevInfo.type) {
case CaptureDeviceType::Camera: {
#ifdef MOZ_WIDGET_ANDROID
if (SetAndroidObjects()) {
LOG(("VideoEngine::SetAndroidObjects Failed"));
break;
}
#endif
mDeviceInfo.reset(webrtc::VideoCaptureFactory::CreateDeviceInfo());
LOG(("CaptureDeviceType::Camera: Finished creating new device."));
break;
}
// Window and Screen and Browser (tab) types are handled by DesktopCapture
case CaptureDeviceType::Browser:
case CaptureDeviceType::Window:
case CaptureDeviceType::Screen: {
#if !defined(WEBRTC_ANDROID) && !defined(WEBRTC_IOS)
mDeviceInfo.reset(webrtc::DesktopCaptureImpl::CreateDeviceInfo(
mId, mCaptureDevInfo.type));
LOG(("screen capture: Finished creating new device."));
#else
MOZ_ASSERT(
"GetVideoCaptureDeviceInfo NO DESKTOP CAPTURE IMPL ON ANDROID" ==
nullptr);
mDeviceInfo.reset();
#endif
break;
}
}
LOG(("EXIT %s", __PRETTY_FUNCTION__));
return mDeviceInfo;
}
already_AddRefed<VideoEngine> VideoEngine::Create(
const CaptureDeviceType& aCaptureDeviceType) {
LOG(("%s", __PRETTY_FUNCTION__));
return do_AddRef(new VideoEngine(aCaptureDeviceType));
}
VideoEngine::CaptureEntry::CaptureEntry(
int32_t aCapnum, rtc::scoped_refptr<webrtc::VideoCaptureModule> aCapture)
: mCapnum(aCapnum), mVideoCaptureModule(aCapture) {}
rtc::scoped_refptr<webrtc::VideoCaptureModule>
VideoEngine::CaptureEntry::VideoCapture() {
return mVideoCaptureModule;
}
int32_t VideoEngine::CaptureEntry::Capnum() const { return mCapnum; }
bool VideoEngine::WithEntry(
const int32_t entryCapnum,
const std::function<void(CaptureEntry& entry)>&& fn) {
#ifdef DEBUG
{
auto it = mIdMap.find(entryCapnum);
MOZ_ASSERT(it != mIdMap.end());
Unused << it;
}
#endif
auto it = mCaps.find(mIdMap[entryCapnum]);
MOZ_ASSERT(it != mCaps.end());
if (it == mCaps.end()) {
return false;
}
fn(it->second);
return true;
}
int32_t VideoEngine::GenerateId() {
// XXX Something better than this (a map perhaps, or a simple boolean TArray,
// given the number in-use is O(1) normally!)
static int sId = 0;
return mId = sId++;
}
VideoEngine::VideoEngine(const CaptureDeviceType& aCaptureDeviceType)
: mId(0), mCaptureDevInfo(aCaptureDeviceType), mDeviceInfo(nullptr) {
LOG(("%s", __PRETTY_FUNCTION__));
LOG(("Creating new VideoEngine with CaptureDeviceType %s",
mCaptureDevInfo.TypeName()));
}
} // namespace mozilla::camera
|
