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// Copyright (c) 2013 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/webrtc/video_destination_handler.h"
#include <string>
#include "base/base64.h"
#include "base/logging.h"
#include "base/rand_util.h"
#include "base/strings/utf_string_conversions.h"
#include "content/renderer/media/media_stream.h"
#include "content/renderer/media/media_stream_registry_interface.h"
#include "content/renderer/media/media_stream_video_track.h"
#include "content/renderer/pepper/ppb_image_data_impl.h"
#include "content/renderer/render_thread_impl.h"
#include "media/video/capture/video_capture_types.h"
#include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/web/WebMediaStreamRegistry.h"
#include "third_party/libyuv/include/libyuv/convert.h"
#include "url/gurl.h"
namespace content {
class PpFrameWriter::FrameWriterDelegate
: public base::RefCountedThreadSafe<FrameWriterDelegate> {
public:
FrameWriterDelegate(
const scoped_refptr<base::MessageLoopProxy>& io_message_loop_proxy,
const VideoCaptureDeliverFrameCB& new_frame_callback);
void DeliverFrame(const scoped_refptr<media::VideoFrame>& frame,
const media::VideoCaptureFormat& format);
private:
friend class base::RefCountedThreadSafe<FrameWriterDelegate>;
virtual ~FrameWriterDelegate();
void DeliverFrameOnIO(const scoped_refptr<media::VideoFrame>& frame,
const media::VideoCaptureFormat& format);
scoped_refptr<base::MessageLoopProxy> io_message_loop_;
VideoCaptureDeliverFrameCB new_frame_callback_;
};
PpFrameWriter::FrameWriterDelegate::FrameWriterDelegate(
const scoped_refptr<base::MessageLoopProxy>& io_message_loop_proxy,
const VideoCaptureDeliverFrameCB& new_frame_callback)
: io_message_loop_(io_message_loop_proxy),
new_frame_callback_(new_frame_callback) {
}
PpFrameWriter::FrameWriterDelegate::~FrameWriterDelegate() {
}
void PpFrameWriter::FrameWriterDelegate::DeliverFrame(
const scoped_refptr<media::VideoFrame>& frame,
const media::VideoCaptureFormat& format) {
io_message_loop_->PostTask(
FROM_HERE,
base::Bind(&FrameWriterDelegate::DeliverFrameOnIO,
this, frame, format));
}
void PpFrameWriter::FrameWriterDelegate::DeliverFrameOnIO(
const scoped_refptr<media::VideoFrame>& frame,
const media::VideoCaptureFormat& format) {
DCHECK(io_message_loop_->BelongsToCurrentThread());
// The local time when this frame is generated is unknown so give a null
// value to |estimated_capture_time|.
new_frame_callback_.Run(frame, format, base::TimeTicks());
}
PpFrameWriter::PpFrameWriter() {
DVLOG(3) << "PpFrameWriter ctor";
}
PpFrameWriter::~PpFrameWriter() {
DVLOG(3) << "PpFrameWriter dtor";
}
void PpFrameWriter::GetCurrentSupportedFormats(
int max_requested_width,
int max_requested_height,
double max_requested_frame_rate,
const VideoCaptureDeviceFormatsCB& callback) {
DCHECK(CalledOnValidThread());
DVLOG(3) << "PpFrameWriter::GetCurrentSupportedFormats()";
// Since the input is free to change the resolution at any point in time
// the supported formats are unknown.
media::VideoCaptureFormats formats;
callback.Run(formats);
}
void PpFrameWriter::StartSourceImpl(
const media::VideoCaptureParams& params,
const VideoCaptureDeliverFrameCB& frame_callback) {
DCHECK(CalledOnValidThread());
DCHECK(!delegate_);
DVLOG(3) << "PpFrameWriter::StartSourceImpl()";
delegate_ = new FrameWriterDelegate(io_message_loop(), frame_callback);
OnStartDone(true);
}
void PpFrameWriter::StopSourceImpl() {
DCHECK(CalledOnValidThread());
}
void PpFrameWriter::PutFrame(PPB_ImageData_Impl* image_data,
int64 time_stamp_ns) {
DCHECK(CalledOnValidThread());
DVLOG(3) << "PpFrameWriter::PutFrame()";
if (!image_data) {
LOG(ERROR) << "PpFrameWriter::PutFrame - Called with NULL image_data.";
return;
}
ImageDataAutoMapper mapper(image_data);
if (!mapper.is_valid()) {
LOG(ERROR) << "PpFrameWriter::PutFrame - "
<< "The image could not be mapped and is unusable.";
return;
}
const SkBitmap* bitmap = image_data->GetMappedBitmap();
if (!bitmap) {
LOG(ERROR) << "PpFrameWriter::PutFrame - "
<< "The image_data's mapped bitmap is NULL.";
return;
}
const gfx::Size frame_size(bitmap->width(), bitmap->height());
if (state() != MediaStreamVideoSource::STARTED)
return;
const base::TimeDelta timestamp = base::TimeDelta::FromMicroseconds(
time_stamp_ns / base::Time::kNanosecondsPerMicrosecond);
// TODO(perkj): It would be more efficient to use I420 here. Using YV12 will
// force a copy into a tightly packed I420 frame in
// WebRtcVideoCapturerAdapter before the frame is delivered to libJingle.
// crbug/359587.
scoped_refptr<media::VideoFrame> new_frame =
frame_pool_.CreateFrame(media::VideoFrame::YV12, frame_size,
gfx::Rect(frame_size), frame_size, timestamp);
media::VideoCaptureFormat format(
frame_size,
MediaStreamVideoSource::kDefaultFrameRate,
media::PIXEL_FORMAT_YV12);
libyuv::BGRAToI420(reinterpret_cast<uint8*>(bitmap->getPixels()),
bitmap->rowBytes(),
new_frame->data(media::VideoFrame::kYPlane),
new_frame->stride(media::VideoFrame::kYPlane),
new_frame->data(media::VideoFrame::kUPlane),
new_frame->stride(media::VideoFrame::kUPlane),
new_frame->data(media::VideoFrame::kVPlane),
new_frame->stride(media::VideoFrame::kVPlane),
frame_size.width(), frame_size.height());
delegate_->DeliverFrame(new_frame, format);
}
// PpFrameWriterProxy is a helper class to make sure the user won't use
// PpFrameWriter after it is released (IOW its owner - WebMediaStreamSource -
// is released).
class PpFrameWriterProxy : public FrameWriterInterface {
public:
explicit PpFrameWriterProxy(const base::WeakPtr<PpFrameWriter>& writer)
: writer_(writer) {
DCHECK(writer_ != NULL);
}
virtual ~PpFrameWriterProxy() {}
virtual void PutFrame(PPB_ImageData_Impl* image_data,
int64 time_stamp_ns) OVERRIDE {
writer_->PutFrame(image_data, time_stamp_ns);
}
private:
base::WeakPtr<PpFrameWriter> writer_;
DISALLOW_COPY_AND_ASSIGN(PpFrameWriterProxy);
};
bool VideoDestinationHandler::Open(
MediaStreamRegistryInterface* registry,
const std::string& url,
FrameWriterInterface** frame_writer) {
DVLOG(3) << "VideoDestinationHandler::Open";
blink::WebMediaStream stream;
if (registry) {
stream = registry->GetMediaStream(url);
} else {
stream =
blink::WebMediaStreamRegistry::lookupMediaStreamDescriptor(GURL(url));
}
if (stream.isNull()) {
LOG(ERROR) << "VideoDestinationHandler::Open - invalid url: " << url;
return false;
}
// Create a new native video track and add it to |stream|.
std::string track_id;
// According to spec, a media stream source's id should be unique per
// application. There's no easy way to strictly achieve that. The id
// generated with this method should be unique for most of the cases but
// theoretically it's possible we can get an id that's duplicated with the
// existing sources.
base::Base64Encode(base::RandBytesAsString(64), &track_id);
PpFrameWriter* writer = new PpFrameWriter();
// Create a new webkit video track.
blink::WebMediaStreamSource webkit_source;
blink::WebMediaStreamSource::Type type =
blink::WebMediaStreamSource::TypeVideo;
blink::WebString webkit_track_id = base::UTF8ToUTF16(track_id);
webkit_source.initialize(webkit_track_id, type, webkit_track_id);
webkit_source.setExtraData(writer);
blink::WebMediaConstraints constraints;
constraints.initialize();
bool track_enabled = true;
stream.addTrack(MediaStreamVideoTrack::CreateVideoTrack(
writer, constraints, MediaStreamVideoSource::ConstraintsCallback(),
track_enabled));
*frame_writer = new PpFrameWriterProxy(writer->AsWeakPtr());
return true;
}
} // namespace content
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