blob: 797d0acaaa2e182587d2642814e17057712b44c8 [file] [log] [blame]
// 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/codec/video_encoder_verbatim.h"
#include <stddef.h>
#include <stdint.h>
#include "base/logging.h"
#include "base/stl_util.h"
#include "remoting/base/util.h"
#include "remoting/proto/video.pb.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
namespace remoting {
static uint8_t* GetPacketOutputBuffer(VideoPacket* packet, size_t size) {
packet->mutable_data()->resize(size);
return reinterpret_cast<uint8_t*>(string_as_array(packet->mutable_data()));
}
VideoEncoderVerbatim::VideoEncoderVerbatim() {}
VideoEncoderVerbatim::~VideoEncoderVerbatim() {}
std::unique_ptr<VideoPacket> VideoEncoderVerbatim::Encode(
const webrtc::DesktopFrame& frame) {
DCHECK(frame.data());
// If nothing has changed in the frame then return NULL to indicate that
// we don't need to actually send anything (e.g. nothing to top-off).
if (frame.updated_region().is_empty())
return nullptr;
// Create a VideoPacket with common fields (e.g. DPI, rects, shape) set.
std::unique_ptr<VideoPacket> packet(helper_.CreateVideoPacket(frame));
packet->mutable_format()->set_encoding(VideoPacketFormat::ENCODING_VERBATIM);
// Calculate output size.
size_t output_size = 0;
for (webrtc::DesktopRegion::Iterator iter(frame.updated_region());
!iter.IsAtEnd(); iter.Advance()) {
const webrtc::DesktopRect& rect = iter.rect();
output_size += rect.width() * rect.height() *
webrtc::DesktopFrame::kBytesPerPixel;
}
uint8_t* out = GetPacketOutputBuffer(packet.get(), output_size);
const int in_stride = frame.stride();
// Encode pixel data for all changed rectangles into the packet.
for (webrtc::DesktopRegion::Iterator iter(frame.updated_region());
!iter.IsAtEnd(); iter.Advance()) {
const webrtc::DesktopRect& rect = iter.rect();
const int row_size = webrtc::DesktopFrame::kBytesPerPixel * rect.width();
const uint8_t* in = frame.data() + rect.top() * in_stride +
rect.left() * webrtc::DesktopFrame::kBytesPerPixel;
for (int y = rect.top(); y < rect.top() + rect.height(); ++y) {
memcpy(out, in, row_size);
out += row_size;
in += in_stride;
}
}
return packet;
}
} // namespace remoting