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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 "remoting/client/rectangle_update_decoder.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/message_loop_proxy.h"
#include "remoting/base/decoder.h"
#include "remoting/base/decoder_row_based.h"
#include "remoting/base/decoder_vp8.h"
#include "remoting/base/util.h"
#include "remoting/client/frame_consumer.h"
#include "remoting/protocol/session_config.h"
using remoting::protocol::ChannelConfig;
using remoting::protocol::SessionConfig;
namespace remoting {
RectangleUpdateDecoder::RectangleUpdateDecoder(
base::MessageLoopProxy* message_loop, FrameConsumer* consumer)
: message_loop_(message_loop),
consumer_(consumer),
screen_size_(SkISize::Make(0, 0)),
clip_rect_(SkIRect::MakeEmpty()),
decoder_needs_reset_(false) {
}
RectangleUpdateDecoder::~RectangleUpdateDecoder() {
}
void RectangleUpdateDecoder::Initialize(const SessionConfig& config) {
// Initialize decoder based on the selected codec.
ChannelConfig::Codec codec = config.video_config().codec;
if (codec == ChannelConfig::CODEC_VERBATIM) {
decoder_.reset(DecoderRowBased::CreateVerbatimDecoder());
} else if (codec == ChannelConfig::CODEC_ZIP) {
decoder_.reset(DecoderRowBased::CreateZlibDecoder());
} else if (codec == ChannelConfig::CODEC_VP8) {
decoder_.reset(new DecoderVp8());
} else {
NOTREACHED() << "Invalid Encoding found: " << codec;
}
}
void RectangleUpdateDecoder::DecodePacket(const VideoPacket* packet,
const base::Closure& done) {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&RectangleUpdateDecoder::DecodePacket,
this, packet, done));
return;
}
AllocateFrame(packet, done);
}
void RectangleUpdateDecoder::AllocateFrame(const VideoPacket* packet,
const base::Closure& done) {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&RectangleUpdateDecoder::AllocateFrame,
this, packet, done));
return;
}
base::ScopedClosureRunner done_runner(done);
// If the packet includes a screen size, store it.
if (packet->format().has_screen_width() &&
packet->format().has_screen_height()) {
screen_size_.set(packet->format().screen_width(),
packet->format().screen_height());
}
// If we've never seen a screen size, ignore the packet.
if (screen_size_.isZero()) {
return;
}
// Ensure the output frame is the right size.
SkISize frame_size = SkISize::Make(0, 0);
if (frame_)
frame_size.set(frame_->width(), frame_->height());
// Allocate a new frame, if necessary.
if ((!frame_) || (screen_size_ != frame_size)) {
if (frame_) {
consumer_->ReleaseFrame(frame_);
frame_ = NULL;
}
consumer_->AllocateFrame(
media::VideoFrame::RGB32, screen_size_, &frame_,
base::Bind(&RectangleUpdateDecoder::ProcessPacketData,
this, packet, done_runner.Release()));
decoder_needs_reset_ = true;
return;
}
ProcessPacketData(packet, done_runner.Release());
}
void RectangleUpdateDecoder::ProcessPacketData(
const VideoPacket* packet, const base::Closure& done) {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&RectangleUpdateDecoder::ProcessPacketData,
this, packet, done));
return;
}
base::ScopedClosureRunner done_runner(done);
if (decoder_needs_reset_) {
decoder_->Reset();
decoder_->Initialize(frame_);
decoder_needs_reset_ = false;
}
if (!decoder_->IsReadyForData()) {
// TODO(ajwong): This whole thing should move into an invalid state.
LOG(ERROR) << "Decoder is unable to process data. Dropping packet.";
return;
}
if (decoder_->DecodePacket(packet) == Decoder::DECODE_DONE)
SubmitToConsumer();
}
void RectangleUpdateDecoder::SetOutputSize(const SkISize& size) {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&RectangleUpdateDecoder::SetOutputSize,
this, size));
return;
}
// TODO(wez): Refresh the frame only if the ratio has changed.
if (frame_) {
SkIRect frame_rect = SkIRect::MakeWH(frame_->width(), frame_->height());
refresh_rects_.push_back(frame_rect);
}
// TODO(hclam): If the scale ratio has changed we should reallocate a
// VideoFrame of different size. However if the scale ratio is always
// smaller than 1.0 we can use the same video frame.
if (decoder_.get()) {
decoder_->SetOutputSize(size);
RefreshFullFrame();
}
}
void RectangleUpdateDecoder::UpdateClipRect(const SkIRect& new_clip_rect) {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&RectangleUpdateDecoder::UpdateClipRect,
this, new_clip_rect));
return;
}
if (new_clip_rect == clip_rect_ || !decoder_.get())
return;
// TODO(wez): Only refresh newly-exposed portions of the frame.
if (frame_) {
SkIRect frame_rect = SkIRect::MakeWH(frame_->width(), frame_->height());
refresh_rects_.push_back(frame_rect);
}
clip_rect_ = new_clip_rect;
decoder_->SetClipRect(new_clip_rect);
// TODO(wez): Defer refresh so that multiple events can be batched.
DoRefresh();
}
void RectangleUpdateDecoder::RefreshFullFrame() {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&RectangleUpdateDecoder::RefreshFullFrame, this));
return;
}
// If a video frame or the decoder is not allocated yet then don't
// save the refresh rectangle to avoid wasted computation.
if (!frame_ || !decoder_.get())
return;
refresh_rects_.push_back(
SkIRect::MakeWH(static_cast<int>(frame_->width()),
static_cast<int>(frame_->height())));
DoRefresh();
}
void RectangleUpdateDecoder::SubmitToConsumer() {
// A frame is not allocated yet, we can reach here because of a refresh
// request.
if (!frame_)
return;
RectVector* dirty_rects = new RectVector();
decoder_->GetUpdatedRects(dirty_rects);
consumer_->OnPartialFrameOutput(frame_, dirty_rects, base::Bind(
&RectangleUpdateDecoder::OnFrameConsumed, this, dirty_rects));
}
void RectangleUpdateDecoder::DoRefresh() {
DCHECK(message_loop_->BelongsToCurrentThread());
if (refresh_rects_.empty())
return;
decoder_->RefreshRects(refresh_rects_);
refresh_rects_.clear();
SubmitToConsumer();
}
void RectangleUpdateDecoder::OnFrameConsumed(RectVector* rects) {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&RectangleUpdateDecoder::OnFrameConsumed,
this, rects));
return;
}
delete rects;
DoRefresh();
}
} // namespace remoting
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