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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/media/local_video_capture.h"
#include "content/renderer/media/video_capture_impl_manager.h"
#include "media/base/video_util.h"
#include "media/video/capture/video_capture_proxy.h"
using media::CopyYPlane;
using media::CopyUPlane;
using media::CopyVPlane;
namespace content {
LocalVideoCapture::LocalVideoCapture(
media::VideoCaptureSessionId video_stream_id,
VideoCaptureImplManager* vc_manager,
const media::VideoCaptureCapability& capability,
const base::Closure& error_cb,
const RepaintCB& repaint_cb)
: video_stream_id_(video_stream_id),
vc_manager_(vc_manager),
capability_(capability),
error_cb_(error_cb),
repaint_cb_(repaint_cb),
capture_engine_(NULL),
message_loop_proxy_(base::MessageLoopProxy::current()),
ALLOW_THIS_IN_INITIALIZER_LIST(
handler_proxy_(new media::VideoCaptureHandlerProxy(
this, message_loop_proxy_))),
state_(VIDEO_CAPTURE_STATE_STOPPED) {
DVLOG(3) << "LocalVideoCapture::ctor";
DCHECK(vc_manager);
}
LocalVideoCapture::~LocalVideoCapture() {
DVLOG(3) << "LocalVideoCapture::dtor";
}
void LocalVideoCapture::Start() {
DVLOG(3) << "LocalVideoCapture::Start";
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
DCHECK_EQ(state_, VIDEO_CAPTURE_STATE_STOPPED);
capture_engine_ = vc_manager_->AddDevice(video_stream_id_, this);
state_ = VIDEO_CAPTURE_STATE_STARTED;
AddRef(); // Will be balanced in OnRemoved().
capture_engine_->StartCapture(handler_proxy_.get(), capability_);
}
void LocalVideoCapture::Stop() {
DVLOG(3) << "LocalVideoCapture::Stop";
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
if (capture_engine_) {
state_ = VIDEO_CAPTURE_STATE_STOPPING;
capture_engine_->StopCapture(handler_proxy_.get());
capture_engine_ = NULL;
}
}
void LocalVideoCapture::Play() {
DVLOG(3) << "LocalVideoCapture::Play";
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
if (capture_engine_ && state_ == VIDEO_CAPTURE_STATE_PAUSED) {
state_ = VIDEO_CAPTURE_STATE_STARTED;
}
}
void LocalVideoCapture::Pause() {
DVLOG(3) << "LocalVideoCapture::Pause";
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
if (capture_engine_ && state_ == VIDEO_CAPTURE_STATE_STARTED) {
state_ = VIDEO_CAPTURE_STATE_PAUSED;
}
}
void LocalVideoCapture::OnStarted(media::VideoCapture* capture) {
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
NOTIMPLEMENTED();
}
void LocalVideoCapture::OnStopped(media::VideoCapture* capture) {
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
NOTIMPLEMENTED();
}
void LocalVideoCapture::OnPaused(media::VideoCapture* capture) {
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
NOTIMPLEMENTED();
}
void LocalVideoCapture::OnError(media::VideoCapture* capture,
int error_code) {
DVLOG(3) << "LocalVideoCapture::OnError, " << error_code;
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
error_cb_.Run();
}
void LocalVideoCapture::OnRemoved(media::VideoCapture* capture) {
DVLOG(3) << "LocalVideoCapture::OnRemoved";
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
// OnRemoved could be triggered by error.
capture_engine_ = NULL;
vc_manager_->RemoveDevice(video_stream_id_, this);
Release(); // Balance the AddRef() in StartCapture().
}
void LocalVideoCapture::OnDeviceInfoReceived(
media::VideoCapture* capture,
const media::VideoCaptureParams& device_info) {
DVLOG(3) << "LocalVideoCapture::OnDeviceInfoReceived";
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
}
void LocalVideoCapture::OnBufferReady(
media::VideoCapture* capture,
scoped_refptr<media::VideoCapture::VideoFrameBuffer> buf) {
DVLOG(3) << "LocalVideoCapture::OnBufferReady, state:" << state_;
DCHECK(message_loop_proxy_->BelongsToCurrentThread());
DCHECK(buf);
if (state_ != VIDEO_CAPTURE_STATE_STARTED) {
capture->FeedBuffer(buf);
return;
}
gfx::Size natural_size(buf->width, buf->height);
scoped_refptr<media::VideoFrame> current_frame =
media::VideoFrame::CreateFrame(media::VideoFrame::YV12, natural_size,
gfx::Rect(natural_size), natural_size,
buf->timestamp - base::Time());
uint8* buffer = buf->memory_pointer;
// Assume YV12 format.
DCHECK_EQ(capability_.color, media::VideoCaptureCapability::kI420);
if (capability_.color != media::VideoCaptureCapability::kI420)
return;
int y_width = buf->width;
int y_height = buf->height;
int uv_width = buf->width / 2;
int uv_height = buf->height / 2;
CopyYPlane(buffer, y_width, y_height, current_frame);
buffer += y_width * y_height;
CopyUPlane(buffer, uv_width, uv_height, current_frame);
buffer += uv_width * uv_height;
CopyVPlane(buffer, uv_width, uv_height, current_frame);
capture->FeedBuffer(buf);
repaint_cb_.Run(current_frame);
}
} // namespace content
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