Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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,
#include "VideoEngine.h"
#include "libwebrtcglue/SystemTime.h"
#include "system_wrappers/include/clock.h"
#include "video_engine/desktop_capture_impl.h"
#ifdef MOZ_WIDGET_ANDROID
# include "mozilla/jni/Utils.h"
#endif
#if defined(ANDROID)
namespace webrtc {
int32_t SetCaptureAndroidVM(JavaVM* javaVM);
}
#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* aDeviceUniqueIdUTF8) {
LOG(("%s", __PRETTY_FUNCTION__));
MOZ_ASSERT(aDeviceUniqueIdUTF8);
int32_t id = GenerateId();
LOG(("CaptureDeviceType=%s id=%d", EnumValueToString(mCaptureDevType), id));
for (auto& it : mCaps) {
if (it.second.VideoCapture() &&
it.second.VideoCapture()->CurrentDeviceName() &&
strcmp(it.second.VideoCapture()->CurrentDeviceName(),
aDeviceUniqueIdUTF8) == 0) {
mIdMap.emplace(id, it.first);
return id;
}
}
CaptureEntry entry = {-1, nullptr, nullptr};
VideoCaptureFactory::CreateVideoCaptureResult capturer =
mVideoCaptureFactory->CreateVideoCapture(id, aDeviceUniqueIdUTF8,
mCaptureDevType);
entry =
CaptureEntry(id, std::move(capturer.mCapturer), capturer.mDesktopImpl);
mCaps.emplace(id, std::move(entry));
mIdMap.emplace(id, id);
return id;
}
int VideoEngine::ReleaseVideoCapture(const int32_t aId) {
bool found = false;
#ifdef DEBUG
{
auto it = mIdMap.find(aId);
MOZ_ASSERT(it != mIdMap.end());
Unused << it;
}
#endif
for (auto& it : mIdMap) {
if (it.first != aId && it.second == mIdMap[aId]) {
// There are other tracks still using this hardware.
found = true;
}
}
if (!found) {
WithEntry(aId, [&found](CaptureEntry& cap) {
cap.mVideoCaptureModule = nullptr;
found = true;
});
MOZ_ASSERT(found);
if (found) {
auto it = mCaps.find(mIdMap[aId]);
MOZ_ASSERT(it != mCaps.end());
mCaps.erase(it);
}
}
mIdMap.erase(aId);
return found ? 0 : (-1);
}
std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo>
VideoEngine::GetOrCreateVideoCaptureDeviceInfo(
webrtc::VideoInputFeedBack* callBack) {
LOG(("%s", __PRETTY_FUNCTION__));
webrtc::Timestamp currentTime = webrtc::Timestamp::Micros(0);
const char* capDevTypeName = EnumValueToString(mCaptureDevType);
if (mDeviceInfo) {
LOG(("Device cache available."));
// Camera cache is invalidated by HW change detection elsewhere
if (mCaptureDevType == 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));
#ifdef MOZ_WIDGET_ANDROID
if (mCaptureDevType == CaptureDeviceType::Camera) {
if (SetAndroidObjects()) {
LOG(("VideoEngine::SetAndroidObjects Failed"));
return mDeviceInfo;
}
}
#endif
mDeviceInfo = mVideoCaptureFactory->CreateDeviceInfo(mId, mCaptureDevType);
if (mDeviceInfo && mCaptureDevType == CaptureDeviceType::Camera) {
mDeviceInfo->RegisterVideoInputFeedBack(callBack);
}
LOG(("EXIT %s", __PRETTY_FUNCTION__));
return mDeviceInfo;
}
void VideoEngine::ClearVideoCaptureDeviceInfo() {
LOG(("%s", __PRETTY_FUNCTION__));
mDeviceInfo.reset();
}
already_AddRefed<VideoEngine> VideoEngine::Create(
const CaptureDeviceType& aCaptureDeviceType,
RefPtr<VideoCaptureFactory> aVideoCaptureFactory) {
LOG(("%s", __PRETTY_FUNCTION__));
return do_AddRef(
new VideoEngine(aCaptureDeviceType, std::move(aVideoCaptureFactory)));
}
VideoEngine::CaptureEntry::CaptureEntry(
int32_t aCapnum, rtc::scoped_refptr<webrtc::VideoCaptureModule> aCapture,
webrtc::DesktopCaptureImpl* aDesktopImpl)
: mCapnum(aCapnum),
mVideoCaptureModule(std::move(aCapture)),
mDesktopImpl(aDesktopImpl) {}
rtc::scoped_refptr<webrtc::VideoCaptureModule>
VideoEngine::CaptureEntry::VideoCapture() {
return mVideoCaptureModule;
}
mozilla::MediaEventSource<void>*
VideoEngine::CaptureEntry::CaptureEndedEvent() {
if (!mDesktopImpl) {
return nullptr;
}
#if !defined(WEBRTC_ANDROID) && !defined(WEBRTC_IOS)
return mDesktopImpl->CaptureEndedEvent();
#else
return nullptr;
#endif
}
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,
RefPtr<VideoCaptureFactory> aVideoCaptureFactory)
: mId(0),
mCaptureDevType(aCaptureDeviceType),
mVideoCaptureFactory(std::move(aVideoCaptureFactory)),
mDeviceInfo(nullptr) {
MOZ_ASSERT(mVideoCaptureFactory);
LOG(("%s", __PRETTY_FUNCTION__));
LOG(("Creating new VideoEngine with CaptureDeviceType %s",
EnumValueToString(mCaptureDevType)));
}
VideoEngine::~VideoEngine() {
MOZ_ASSERT(mCaps.empty());
MOZ_ASSERT(mIdMap.empty());
}
} // namespace mozilla::camera