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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/browser/renderer_host/media/video_capture_host.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include "content/browser/renderer_host/media/media_stream_manager.h"
#include "content/browser/resource_context.h"
#include "content/common/media/video_capture_messages.h"
VideoCaptureHost::VideoCaptureHost(
const content::ResourceContext* resource_context)
: resource_context_(resource_context) {
}
VideoCaptureHost::~VideoCaptureHost() {}
void VideoCaptureHost::OnChannelClosing() {
BrowserMessageFilter::OnChannelClosing();
// Since the IPC channel is gone, close all requested VideCaptureDevices.
for (EntryMap::iterator it = entries_.begin(); it != entries_.end(); it++) {
VideoCaptureController* controller = it->second;
// Since the channel is closing we need a task to make sure VideoCaptureHost
// is not deleted before VideoCaptureController.
controller->StopCapture(
NewRunnableMethod(this, &VideoCaptureHost::OnReadyToDelete, it->first));
}
}
void VideoCaptureHost::OnDestruct() const {
BrowserThread::DeleteOnIOThread::Destruct(this);
}
///////////////////////////////////////////////////////////////////////////////
// Implements VideoCaptureControllerEventHandler.
void VideoCaptureHost::OnError(const VideoCaptureControllerID& id) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableMethod(this, &VideoCaptureHost::DoHandleError, id.device_id));
}
void VideoCaptureHost::OnBufferCreated(
const VideoCaptureControllerID& id,
base::SharedMemoryHandle handle,
int length,
int buffer_id) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableMethod(this, &VideoCaptureHost::DoSendNewBuffer,
id.device_id, handle, length, buffer_id));
}
void VideoCaptureHost::OnBufferReady(
const VideoCaptureControllerID& id,
int buffer_id,
base::Time timestamp) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableMethod(this, &VideoCaptureHost::DoSendFilledBuffer,
id.device_id, buffer_id, timestamp));
}
void VideoCaptureHost::OnFrameInfo(const VideoCaptureControllerID& id,
int width,
int height,
int frame_per_second) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableMethod(this, &VideoCaptureHost::DoSendFrameInfo,
id.device_id, width, height, frame_per_second));
}
void VideoCaptureHost::OnReadyToDelete(const VideoCaptureControllerID& id) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableMethod(this, &VideoCaptureHost::DoDeleteVideoCaptureController,
id));
}
void VideoCaptureHost::DoSendNewBuffer(
int device_id, base::SharedMemoryHandle handle,
int length, int buffer_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
Send(new VideoCaptureMsg_NewBuffer(device_id, handle,
length, buffer_id));
}
void VideoCaptureHost::DoSendFilledBuffer(
int device_id, int buffer_id, base::Time timestamp) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
Send(new VideoCaptureMsg_BufferReady(device_id, buffer_id,
timestamp));
}
void VideoCaptureHost::DoHandleError(int device_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
Send(new VideoCaptureMsg_StateChanged(device_id,
media::VideoCapture::kError));
VideoCaptureControllerID id(device_id);
EntryMap::iterator it = entries_.find(id);
if (it != entries_.end()) {
VideoCaptureController* controller = it->second;
controller->StopCapture(NULL);
}
}
void VideoCaptureHost::DoSendFrameInfo(int device_id,
int width,
int height,
int frame_per_second) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
media::VideoCaptureParams params;
params.width = width;
params.height = height;
params.frame_per_second = frame_per_second;
Send(new VideoCaptureMsg_DeviceInfo(device_id, params));
Send(new VideoCaptureMsg_StateChanged(device_id,
media::VideoCapture::kStarted));
}
///////////////////////////////////////////////////////////////////////////////
// IPC Messages handler.
bool VideoCaptureHost::OnMessageReceived(const IPC::Message& message,
bool* message_was_ok) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(VideoCaptureHost, message, *message_was_ok)
IPC_MESSAGE_HANDLER(VideoCaptureHostMsg_Start, OnStartCapture)
IPC_MESSAGE_HANDLER(VideoCaptureHostMsg_Pause, OnPauseCapture)
IPC_MESSAGE_HANDLER(VideoCaptureHostMsg_Stop, OnStopCapture)
IPC_MESSAGE_HANDLER(VideoCaptureHostMsg_BufferReady, OnReceiveEmptyBuffer)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP_EX()
return handled;
}
void VideoCaptureHost::OnStartCapture(int device_id,
const media::VideoCaptureParams& params) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
VideoCaptureControllerID controller_id(device_id);
DCHECK(entries_.find(controller_id) == entries_.end());
scoped_refptr<VideoCaptureController> controller =
new VideoCaptureController(
controller_id, peer_handle(), this,
resource_context_->media_stream_manager()->video_capture_manager());
entries_.insert(std::make_pair(controller_id, controller));
controller->StartCapture(params);
}
void VideoCaptureHost::OnStopCapture(int device_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
VideoCaptureControllerID controller_id(device_id);
EntryMap::iterator it = entries_.find(controller_id);
if (it != entries_.end()) {
scoped_refptr<VideoCaptureController> controller = it->second;
controller->StopCapture(NULL);
} else {
// It does not exist so it must have been stopped already.
Send(new VideoCaptureMsg_StateChanged(device_id,
media::VideoCapture::kStopped));
}
}
void VideoCaptureHost::OnPauseCapture(int device_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Not used.
Send(new VideoCaptureMsg_StateChanged(device_id,
media::VideoCapture::kError));
}
void VideoCaptureHost::OnReceiveEmptyBuffer(int device_id, int buffer_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
VideoCaptureControllerID controller_id(device_id);
EntryMap::iterator it = entries_.find(controller_id);
if (it != entries_.end()) {
scoped_refptr<VideoCaptureController> controller = it->second;
controller->ReturnBuffer(buffer_id);
}
}
void VideoCaptureHost::DoDeleteVideoCaptureController(
const VideoCaptureControllerID& id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Report that the device have successfully been stopped.
Send(new VideoCaptureMsg_StateChanged(id.device_id,
media::VideoCapture::kStopped));
entries_.erase(id);
}
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