| // 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; |
| } |
| |
| // 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]; |
| } |
| |
| 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; |
| } |