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// Copyright (c) 2012 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/pepper/pepper_platform_video_capture_impl.h"
#include "base/bind.h"
#include "base/logging.h"
#include "base/message_loop/message_loop_proxy.h"
#include "content/renderer/media/video_capture_impl_manager.h"
#include "content/renderer/pepper/pepper_plugin_delegate_impl.h"
#include "content/renderer/render_thread_impl.h"
#include "media/video/capture/video_capture_proxy.h"
namespace content {
PepperPlatformVideoCaptureImpl::PepperPlatformVideoCaptureImpl(
const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
const std::string& device_id,
webkit::ppapi::PluginDelegate::PlatformVideoCaptureEventHandler* handler)
: plugin_delegate_(plugin_delegate),
device_id_(device_id),
session_id_(0),
handler_proxy_(new media::VideoCaptureHandlerProxy(
this, base::MessageLoopProxy::current())),
handler_(handler),
video_capture_(NULL),
unbalanced_start_(false) {
if (device_id.empty()) {
// "1" is the session ID for the default device.
session_id_ = 1;
Initialize();
} else {
// We need to open the device and obtain the label and session ID before
// initializing.
if (plugin_delegate_.get()) {
plugin_delegate_->OpenDevice(
PP_DEVICETYPE_DEV_VIDEOCAPTURE,
device_id,
base::Bind(&PepperPlatformVideoCaptureImpl::OnDeviceOpened, this));
}
}
}
void PepperPlatformVideoCaptureImpl::StartCapture(
media::VideoCapture::EventHandler* handler,
const media::VideoCaptureCapability& capability) {
DCHECK(handler == handler_);
if (unbalanced_start_)
return;
if (video_capture_) {
unbalanced_start_ = true;
AddRef(); // Will be balanced in OnRemoved().
video_capture_->StartCapture(handler_proxy_.get(), capability);
}
}
void PepperPlatformVideoCaptureImpl::StopCapture(
media::VideoCapture::EventHandler* handler) {
DCHECK(handler == handler_);
if (!unbalanced_start_)
return;
if (video_capture_) {
unbalanced_start_ = false;
video_capture_->StopCapture(handler_proxy_.get());
}
}
void PepperPlatformVideoCaptureImpl::FeedBuffer(
scoped_refptr<VideoFrameBuffer> buffer) {
if (video_capture_)
video_capture_->FeedBuffer(buffer);
}
bool PepperPlatformVideoCaptureImpl::CaptureStarted() {
return handler_proxy_->state().started;
}
int PepperPlatformVideoCaptureImpl::CaptureWidth() {
return handler_proxy_->state().width;
}
int PepperPlatformVideoCaptureImpl::CaptureHeight() {
return handler_proxy_->state().height;
}
int PepperPlatformVideoCaptureImpl::CaptureFrameRate() {
return handler_proxy_->state().frame_rate;
}
void PepperPlatformVideoCaptureImpl::DetachEventHandler() {
handler_ = NULL;
StopCapture(NULL);
}
void PepperPlatformVideoCaptureImpl::OnStarted(VideoCapture* capture) {
if (handler_)
handler_->OnStarted(capture);
}
void PepperPlatformVideoCaptureImpl::OnStopped(VideoCapture* capture) {
if (handler_)
handler_->OnStopped(capture);
}
void PepperPlatformVideoCaptureImpl::OnPaused(VideoCapture* capture) {
if (handler_)
handler_->OnPaused(capture);
}
void PepperPlatformVideoCaptureImpl::OnError(
VideoCapture* capture,
int error_code) {
if (handler_)
handler_->OnError(capture, error_code);
}
void PepperPlatformVideoCaptureImpl::OnRemoved(VideoCapture* capture) {
if (handler_)
handler_->OnRemoved(capture);
Release(); // Balance the AddRef() in StartCapture().
}
void PepperPlatformVideoCaptureImpl::OnBufferReady(
VideoCapture* capture,
scoped_refptr<VideoFrameBuffer> buffer) {
if (handler_) {
handler_->OnBufferReady(capture, buffer);
} else {
// Even after handler_ is detached, we have to return buffers that are in
// flight to us. Otherwise VideoCaptureController will not tear down.
FeedBuffer(buffer);
}
}
void PepperPlatformVideoCaptureImpl::OnDeviceInfoReceived(
VideoCapture* capture,
const media::VideoCaptureParams& device_info) {
if (handler_)
handler_->OnDeviceInfoReceived(capture, device_info);
}
PepperPlatformVideoCaptureImpl::~PepperPlatformVideoCaptureImpl() {
if (video_capture_) {
VideoCaptureImplManager* manager =
RenderThreadImpl::current()->video_capture_impl_manager();
manager->RemoveDevice(session_id_, handler_proxy_.get());
}
if (plugin_delegate_.get() && !label_.empty())
plugin_delegate_->CloseDevice(label_);
}
void PepperPlatformVideoCaptureImpl::Initialize() {
VideoCaptureImplManager* manager =
RenderThreadImpl::current()->video_capture_impl_manager();
video_capture_ = manager->AddDevice(session_id_, handler_proxy_.get());
}
void PepperPlatformVideoCaptureImpl::OnDeviceOpened(int request_id,
bool succeeded,
const std::string& label) {
succeeded = succeeded && plugin_delegate_.get();
if (succeeded) {
label_ = label;
session_id_ = plugin_delegate_->GetSessionID(PP_DEVICETYPE_DEV_VIDEOCAPTURE,
label);
Initialize();
}
if (handler_)
handler_->OnInitialized(this, succeeded);
}
} // namespace content
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