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content / renderer / pepper / pepper_platform_video_capture.cc [blame]
// Copyright 2012 The Chromium Authors
// 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.h"
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/memory/ref_counted.h"
#include "base/notreached.h"
#include "base/task/bind_post_task.h"
#include "content/renderer/pepper/pepper_media_device_manager.h"
#include "content/renderer/pepper/pepper_video_capture_host.h"
#include "content/renderer/render_frame_impl.h"
#include "content/renderer/render_thread_impl.h"
#include "media/base/video_frame.h"
#include "third_party/blink/public/platform/modules/video_capture/web_video_capture_impl_manager.h"
namespace content {
PepperPlatformVideoCapture::PepperPlatformVideoCapture(
int render_frame_id,
const std::string& device_id,
PepperVideoCaptureHost* handler)
: render_frame_id_(render_frame_id),
device_id_(device_id),
handler_(handler),
pending_open_device_(false),
pending_open_device_id_(-1) {
// We need to open the device and obtain the label and session ID before
// initializing.
PepperMediaDeviceManager* const device_manager = GetMediaDeviceManager();
if (device_manager) {
pending_open_device_id_ = device_manager->OpenDevice(
PP_DEVICETYPE_DEV_VIDEOCAPTURE, device_id, handler->pp_instance(),
base::BindOnce(&PepperPlatformVideoCapture::OnDeviceOpened,
weak_factory_.GetWeakPtr()));
pending_open_device_ = true;
}
}
void PepperPlatformVideoCapture::StartCapture(
const media::VideoCaptureParams& params) {
DCHECK(thread_checker_.CalledOnValidThread());
if (stop_capture_cb_)
return;
blink::WebVideoCaptureImplManager* manager =
RenderThreadImpl::current()->video_capture_impl_manager();
stop_capture_cb_ = manager->StartCapture(
session_id_, params,
base::BindPostTaskToCurrentDefault(
base::BindRepeating(&PepperPlatformVideoCapture::OnStateUpdate,
weak_factory_.GetWeakPtr())),
base::BindPostTaskToCurrentDefault(
base::BindRepeating(&PepperPlatformVideoCapture::OnFrameReady,
weak_factory_.GetWeakPtr())),
/*sub_capture_target_version_cb=*/base::DoNothing(),
/*frame_dropped_cb=*/base::DoNothing());
}
void PepperPlatformVideoCapture::StopCapture() {
DCHECK(thread_checker_.CalledOnValidThread());
if (!stop_capture_cb_)
return;
std::move(stop_capture_cb_).Run();
}
void PepperPlatformVideoCapture::DetachEventHandler() {
handler_ = nullptr;
StopCapture();
if (release_device_cb_) {
std::move(release_device_cb_).Run();
}
if (!label_.empty()) {
PepperMediaDeviceManager* const device_manager = GetMediaDeviceManager();
if (device_manager)
device_manager->CloseDevice(label_);
label_.clear();
}
if (pending_open_device_) {
PepperMediaDeviceManager* const device_manager = GetMediaDeviceManager();
if (device_manager)
device_manager->CancelOpenDevice(pending_open_device_id_);
pending_open_device_ = false;
pending_open_device_id_ = -1;
}
}
PepperPlatformVideoCapture::~PepperPlatformVideoCapture() {
DCHECK(!stop_capture_cb_);
DCHECK(!release_device_cb_);
DCHECK(label_.empty());
DCHECK(!pending_open_device_);
}
void PepperPlatformVideoCapture::OnDeviceOpened(int request_id,
bool succeeded,
const std::string& label) {
RenderFrameImpl* render_frame =
RenderFrameImpl::FromRoutingID(render_frame_id_);
if (!render_frame) {
if (handler_)
handler_->OnInitialized(false);
return;
}
pending_open_device_ = false;
pending_open_device_id_ = -1;
PepperMediaDeviceManager* const device_manager = GetMediaDeviceManager();
succeeded = succeeded && device_manager;
if (succeeded) {
label_ = label;
session_id_ = device_manager->GetSessionID(
PP_DEVICETYPE_DEV_VIDEOCAPTURE, label);
blink::WebVideoCaptureImplManager* manager =
RenderThreadImpl::current()->video_capture_impl_manager();
release_device_cb_ = manager->UseDevice(
session_id_, render_frame->GetBrowserInterfaceBroker());
}
if (handler_)
handler_->OnInitialized(succeeded);
}
void PepperPlatformVideoCapture::OnStateUpdate(blink::VideoCaptureState state) {
if (!handler_)
return;
switch (state) {
case blink::VIDEO_CAPTURE_STATE_STARTED:
handler_->OnStarted();
break;
case blink::VIDEO_CAPTURE_STATE_STOPPED:
handler_->OnStopped();
break;
case blink::VIDEO_CAPTURE_STATE_PAUSED:
handler_->OnPaused();
break;
case blink::VIDEO_CAPTURE_STATE_ERROR:
handler_->OnError();
break;
default:
NOTREACHED_IN_MIGRATION() << "Unexpected state: " << state << ".";
}
}
void PepperPlatformVideoCapture::OnFrameReady(
scoped_refptr<media::VideoFrame> video_frame,
base::TimeTicks estimated_capture_time) {
if (handler_ && stop_capture_cb_) {
// The scaled video frames are ignored by Pepper.
handler_->OnFrameReady(std::move(video_frame));
}
}
PepperMediaDeviceManager* PepperPlatformVideoCapture::GetMediaDeviceManager() {
RenderFrameImpl* const render_frame =
RenderFrameImpl::FromRoutingID(render_frame_id_);
return render_frame
? PepperMediaDeviceManager::GetForRenderFrame(render_frame).get()
: nullptr;
}
} // namespace content