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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.
// Protocol for video messages.
syntax = "proto2";
option optimize_for = LITE_RUNTIME;
package remoting;
// A message that gets sent to the client after the client is connected to the
// host. It contains information that the client needs to know about the host.
// NEXT ID: 3
// TODO(sergeyu): Move to the control channel.
message InitClientMessage {
required int32 width = 1;
required int32 height = 2;
}
// Identifies the pixel format.
// Note that this list should match exactly the same as
// media::VideoFrame::Format in media/base/video_frame.h.
enum PixelFormat {
PIXEL_FORMAT_INVALID = 0;
PIXEL_FORMAT_RGB555 = 1;
PIXEL_FORMAT_RGB565 = 2;
PIXEL_FORMAT_RGB24 = 3;
PIXEL_FORMAT_RGB32 = 4;
PIXEL_FORMAT_RGBA = 5;
PIXEL_FORMAT_YV12 = 6;
PIXEL_FORMAT_YV16 = 7;
PIXEL_FORMAT_NV12 = 8;
PIXEL_FORMAT_EMPTY = 9;
PIXEL_FORMAT_ASCII = 10;
}
// TODO(ajwong): Determine if these fields should be optional or required.
message VideoPacketFormat {
// Identifies how the image was encoded.
enum Encoding {
ENCODING_INVALID = -1;
ENCODING_VERBATIM = 0;
ENCODING_ZLIB = 1;
ENCODING_VP8 = 2;
};
// X,Y coordinates (in screen pixels) for origin of this update.
optional int32 x = 1;
optional int32 y = 2;
// Width, height (in screen pixels) for this update.
optional int32 width = 3;
optional int32 height = 4;
// The encoding used for this image update.
optional Encoding encoding = 5 [default = ENCODING_INVALID];
// The pixel format of this image.
optional PixelFormat pixel_format = 6 [default = PIXEL_FORMAT_RGB24];
}
message VideoPacket {
// Bitmasks for use in the flags field below.
//
// The encoder may fragment one update into multiple packets depending on
// how the encoder outputs data. Thus, one update can logically consist of
// multiple packets. The FIRST_PACKET and LAST_PACKET flags are used to
// indicate the start and end of a logical update. Here are notable
// consequences:
// * Both FIRST_PACKET and LAST_PACKET may be set if an update is only
// one packet long.
// * The VideoPacketFormat is only supplied in a FIRST_PACKET.
// * An local update cannot change format between a FIRST_PACKET and
// a LAST_PACKET.
// * All packets in one logical update must be processed in order, and
// packets may not be skipped.
enum Flags {
FIRST_PACKET = 1;
LAST_PACKET = 2;
}
optional int32 flags = 1 [default = 0];
// The sequence number of the partial data for updating a rectangle.
optional int32 sequence_number = 2 [default = 0];
optional int32 timestamp = 3 [default = 0];
// This is provided on the first packet of the rectangle data, when
// the flags has FIRST_PACKET set.
optional VideoPacketFormat format = 4;
optional bytes data = 5;
}
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