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/* -*- 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* aDeviceUniqueIdUTF8) {
LOG(("%s", __PRETTY_FUNCTION__));
MOZ_ASSERT(aDeviceUniqueIdUTF8);
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(),
aDeviceUniqueIdUTF8) == 0) {
mIdMap.emplace(id, it.first);
return id;
}
}
CaptureEntry entry = {-1, nullptr};
if (mCaptureDevInfo.type == CaptureDeviceType::Camera) {
entry = CaptureEntry(
id, webrtc::VideoCaptureFactory::Create(aDeviceUniqueIdUTF8));
if (entry.VideoCapture()) {
entry.VideoCapture()->SetApplyRotation(true);
}
} else {
#ifndef WEBRTC_ANDROID
entry = CaptureEntry(
id, rtc::scoped_refptr<webrtc::VideoCaptureModule>(
webrtc::DesktopCaptureImpl::Create(id, aDeviceUniqueIdUTF8,
mCaptureDevInfo.type)));
#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 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() {
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 = 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()));
}
VideoEngine::~VideoEngine() {
MOZ_ASSERT(mCaps.empty());
MOZ_ASSERT(mIdMap.empty());
}
} // namespace mozilla::camera
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