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// Copyright (c) 2010 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/decoder_verbatim.h"
#include "remoting/base/protocol_util.h"
namespace remoting {
DecoderVerbatim::DecoderVerbatim()
: updated_rects_(NULL),
reverse_rows_(true) {
}
bool DecoderVerbatim::BeginDecode(scoped_refptr<media::VideoFrame> frame,
UpdatedRects* updated_rects,
Task* partial_decode_done,
Task* decode_done) {
DCHECK(!partial_decode_done_.get());
DCHECK(!decode_done_.get());
DCHECK(!updated_rects_);
partial_decode_done_.reset(partial_decode_done);
decode_done_.reset(decode_done);
updated_rects_ = updated_rects;
// TODO(hclam): Check if we can accept the color format of the video frame
// and the codec.
frame_ = frame;
return true;
}
bool DecoderVerbatim::PartialDecode(HostMessage* message) {
scoped_ptr<HostMessage> msg_deleter(message);
int width = message->update_stream_packet().header().width();
int height = message->update_stream_packet().header().height();
int x = message->update_stream_packet().header().x();
int y = message->update_stream_packet().header().y();
PixelFormat pixel_format =
message->update_stream_packet().header().pixel_format();
if (static_cast<PixelFormat>(frame_->format()) != pixel_format) {
NOTREACHED() << "Pixel format of message doesn't match the video frame. "
"Expected vs received = "
<< frame_->format() << " vs " << pixel_format
<< " Color space conversion required.";
}
int bytes_per_pixel = GetBytesPerPixel(pixel_format);
// Copy the data line by line.
const int src_stride = bytes_per_pixel * width;
const char* src = message->update_stream_packet().data().c_str();
int src_stride_dir = src_stride;
if (reverse_rows_) {
// Copy rows from bottom to top to flip the image vertically.
src += (height - 1) * src_stride;
// Change the direction of the stride to work bottom to top.
src_stride_dir *= -1;
}
const int dest_stride = frame_->stride(media::VideoFrame::kRGBPlane);
uint8* dest = frame_->data(media::VideoFrame::kRGBPlane) +
dest_stride * y + bytes_per_pixel * x;
for (int i = 0; i < height; ++i) {
memcpy(dest, src, src_stride);
dest += dest_stride;
src += src_stride_dir;
}
updated_rects_->clear();
updated_rects_->push_back(gfx::Rect(x, y, width, height));
partial_decode_done_->Run();
return true;
}
void DecoderVerbatim::EndDecode() {
decode_done_->Run();
partial_decode_done_.reset();
decode_done_.reset();
frame_ = NULL;
updated_rects_ = NULL;
}
} // namespace remoting
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