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// Copyright 2014 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/devtools/protocol/frame_recorder.h"
#include "base/base64.h"
#include "base/bind.h"
#include "base/macros.h"
#include "base/task_runner_util.h"
#include "base/threading/worker_pool.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/geometry/size.h"
namespace content {
namespace devtools {
namespace page {
namespace {
static int kMaxRecordFrameCount = 180;
std::string EncodeFrame(const SkBitmap& bitmap) {
std::vector<unsigned char> data;
SkAutoLockPixels lock_image(bitmap);
bool encoded = gfx::PNGCodec::Encode(
reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
gfx::PNGCodec::FORMAT_SkBitmap,
gfx::Size(bitmap.width(), bitmap.height()),
bitmap.width() * bitmap.bytesPerPixel(),
false, std::vector<gfx::PNGCodec::Comment>(), &data);
if (!encoded)
return std::string();
std::string base_64_data;
base::Base64Encode(
base::StringPiece(reinterpret_cast<char*>(&data[0]), data.size()),
&base_64_data);
return base_64_data;
}
} // namespace
typedef DevToolsProtocolClient::Response Response;
FrameRecorder::FrameRecorder()
: host_(nullptr),
state_(Ready),
inflight_requests_count_(0),
max_frame_count_(0),
captured_frames_count_(0),
last_captured_frame_timestamp_(base::Time()),
weak_factory_(this) {
}
FrameRecorder::~FrameRecorder() {
}
void FrameRecorder::SetRenderViewHost(RenderViewHostImpl* host) {
host_ = host;
}
Response FrameRecorder::StartRecordingFrames(int max_frame_count) {
if (max_frame_count <= 0 || max_frame_count > kMaxRecordFrameCount)
return Response::InvalidParams("maxFrameCount");
if (state_ != Ready)
return Response::InternalError("Already recording");
state_ = Recording;
max_frame_count_ = max_frame_count;
captured_frames_count_ = 0;
last_captured_frame_timestamp_ = base::Time();
std::vector<scoped_refptr<devtools::page::RecordedFrame>> frames;
frames.reserve(max_frame_count);
frames_.swap(frames);
return Response::OK();
}
Response FrameRecorder::StopRecordingFrames(
StopRecordingFramesCallback callback) {
if (state_ != Recording)
return Response::InternalError("Not recording");
state_ = Encoding;
callback_ = callback;
MaybeSendResponse();
return Response::OK();
}
void FrameRecorder::OnSwapCompositorFrame() {
if (!host_ || state_ != Recording)
return;
if (captured_frames_count_ >= max_frame_count_)
return;
RenderWidgetHostViewBase* view =
static_cast<RenderWidgetHostViewBase*>(host_->GetView());
if (!view)
return;
inflight_requests_count_++;
view->CopyFromCompositingSurface(
gfx::Rect(),
gfx::Size(),
base::Bind(&FrameRecorder::FrameCaptured, weak_factory_.GetWeakPtr()),
kN32_SkColorType);
}
void FrameRecorder::FrameCaptured(
const SkBitmap& bitmap, ReadbackResponse response) {
inflight_requests_count_--;
base::Time timestamp = last_captured_frame_timestamp_;
last_captured_frame_timestamp_ = base::Time::Now();
if (timestamp.is_null() || response != READBACK_SUCCESS)
return;
captured_frames_count_++;
base::PostTaskAndReplyWithResult(
base::WorkerPool::GetTaskRunner(true).get(),
FROM_HERE,
base::Bind(&EncodeFrame, bitmap),
base::Bind(&FrameRecorder::FrameEncoded, weak_factory_.GetWeakPtr(),
timestamp.ToDoubleT()));
}
void FrameRecorder::FrameEncoded(
double timestamp, const std::string& encoded_frame) {
frames_.push_back(RecordedFrame::Create()
->set_data(encoded_frame)
->set_timestamp(timestamp));
MaybeSendResponse();
}
void FrameRecorder::MaybeSendResponse() {
if (state_ != Encoding)
return;
if (inflight_requests_count_ || frames_.size() != captured_frames_count_)
return;
callback_.Run(StopRecordingFramesResponse::Create()->set_frames(frames_));
std::vector<scoped_refptr<devtools::page::RecordedFrame>> frames;
frames_.swap(frames);
state_ = Ready;
}
} // namespace page
} // namespace devtools
} // namespace content
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