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// Copyright (c) 2011 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 "content/renderer/media/video_capture_impl_manager.h"
#include "base/memory/singleton.h"
#include "content/common/child_process.h"
#include "content/common/child_thread.h"
#include "content/common/video_capture_messages.h"
#include "content/common/view_messages.h"
#include "media/base/message_loop_factory_impl.h"
namespace {
// VideoCaptureMessageFilterCreator is to be used as a singleton so we can get
// access to a shared VideoCaptureMessageFilter.
// Example usage:
// VideoCaptureMessageFilter* filter =
// VideoCaptureMessageFilterCreator::SharedFilter();
class VideoCaptureMessageFilterCreator {
public:
VideoCaptureMessageFilterCreator() {
int routing_id;
ChildThread::current()->Send(
new ViewHostMsg_GenerateRoutingID(&routing_id));
filter_ = new VideoCaptureMessageFilter(routing_id);
filter_->AddFilter();
}
static VideoCaptureMessageFilter* SharedFilter() {
return GetInstance()->filter_.get();
}
static VideoCaptureMessageFilterCreator* GetInstance() {
return Singleton<VideoCaptureMessageFilterCreator>::get();
}
private:
scoped_refptr<VideoCaptureMessageFilter> filter_;
};
} // namespace
VideoCaptureImplManager::VideoCaptureImplManager() {
ml_factory_.reset(new media::MessageLoopFactoryImpl());
ml_proxy_ = ml_factory_->GetMessageLoopProxy("VC manager");
}
VideoCaptureImplManager::~VideoCaptureImplManager() {}
// static
media::VideoCapture* VideoCaptureImplManager::AddDevice(
media::VideoCaptureSessionId id,
media::VideoCapture::EventHandler* handler) {
DCHECK(handler);
VideoCaptureImplManager* manager = GetInstance();
base::AutoLock auto_lock(manager->lock_);
Devices::iterator it = manager->devices_.find(id);
if (it == manager->devices_.end()) {
VideoCaptureImpl* vc =
new VideoCaptureImpl(id, manager->ml_proxy_,
VideoCaptureMessageFilterCreator::SharedFilter());
manager->devices_[id] = Device(vc, handler);
vc->Init();
return vc;
}
manager->devices_[id].clients.push_front(handler);
return it->second.vc;
}
// static
void VideoCaptureImplManager::RemoveDevice(
media::VideoCaptureSessionId id,
media::VideoCapture::EventHandler* handler) {
DCHECK(handler);
VideoCaptureImplManager* manager = GetInstance();
base::AutoLock auto_lock(manager->lock_);
Devices::iterator it = manager->devices_.find(id);
if (it == manager->devices_.end())
return;
size_t size = it->second.clients.size();
it->second.clients.remove(handler);
if (size == it->second.clients.size() || size > 1)
return;
manager->devices_[id].vc->DeInit(NewRunnableMethod(manager,
&VideoCaptureImplManager::FreeDevice, manager->devices_[id].vc));
manager->devices_.erase(id);
return;
}
// static
VideoCaptureImplManager* VideoCaptureImplManager::GetInstance() {
return Singleton<VideoCaptureImplManager>::get();
}
void VideoCaptureImplManager::FreeDevice(VideoCaptureImpl* vc) {
delete vc;
}
VideoCaptureImplManager::Device::Device() : vc(NULL) {}
VideoCaptureImplManager::Device::Device(
VideoCaptureImpl* device,
media::VideoCapture::EventHandler* handler)
: vc(device) {
clients.push_front(handler);
}
VideoCaptureImplManager::Device::~Device() {}
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