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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Protocol for video messages. | |
6 | |
7 syntax = "proto2"; | |
8 | |
9 option optimize_for = LITE_RUNTIME; | |
10 | |
11 package remoting; | |
12 | |
13 // A message that gets sent to the client after the client is connected to the | |
14 // host. It contains information that the client needs to know about the host. | |
15 // NEXT ID: 3 | |
16 // TODO(sergeyu): Move to the control channel. | |
17 message InitClientMessage { | |
18 required int32 width = 1; | |
19 required int32 height = 2; | |
20 } | |
21 | |
22 // Identifies the pixel format. | |
23 // Note that this list should match exactly the same as | |
24 // media::VideoFrame::Format in media/base/video_frame.h. | |
25 enum PixelFormat { | |
26 PIXEL_FORMAT_INVALID = 0; | |
27 PIXEL_FORMAT_RGB555 = 1; | |
28 PIXEL_FORMAT_RGB565 = 2; | |
29 PIXEL_FORMAT_RGB24 = 3; | |
30 PIXEL_FORMAT_RGB32 = 4; | |
31 PIXEL_FORMAT_RGBA = 5; | |
32 PIXEL_FORMAT_YV12 = 6; | |
33 PIXEL_FORMAT_YV16 = 7; | |
34 PIXEL_FORMAT_NV12 = 8; | |
35 PIXEL_FORMAT_EMPTY = 9; | |
36 PIXEL_FORMAT_ASCII = 10; | |
37 } | |
38 | |
39 // TODO(ajwong): Determine if these fields should be optional or required. | |
40 message VideoPacketFormat { | |
41 // Identifies how the image was encoded. | |
42 enum Encoding { | |
43 ENCODING_INVALID = -1; | |
44 ENCODING_VERBATIM = 0; | |
45 ENCODING_ZLIB = 1; | |
46 ENCODING_VP8 = 2; | |
47 }; | |
48 | |
49 // X,Y coordinates (in screen pixels) for origin of this update. | |
50 optional int32 x = 1; | |
51 optional int32 y = 2; | |
52 | |
53 // Width, height (in screen pixels) for this update. | |
54 optional int32 width = 3; | |
55 optional int32 height = 4; | |
56 | |
57 // The encoding used for this image update. | |
58 optional Encoding encoding = 5 [default = ENCODING_INVALID]; | |
59 | |
60 // The pixel format of this image. | |
61 optional PixelFormat pixel_format = 6 [default = PIXEL_FORMAT_RGB24]; | |
62 } | |
63 | |
64 message VideoPacket { | |
65 // Bitmasks for use in the flags field below. | |
66 // | |
67 // The encoder may fragment one update into multiple packets depending on | |
68 // how the encoder outputs data. Thus, one update can logically consist of | |
69 // multiple packets. The FIRST_PACKET and LAST_PACKET flags are used to | |
70 // indicate the start and end of a logical update. Here are notable | |
71 // consequences: | |
72 // * Both FIRST_PACKET and LAST_PACKET may be set if an update is only | |
73 // one packet long. | |
74 // * The VideoPacketFormat is only supplied in a FIRST_PACKET. | |
75 // * An local update cannot change format between a FIRST_PACKET and | |
76 // a LAST_PACKET. | |
77 // * All packets in one logical update must be processed in order, and | |
78 // packets may not be skipped. | |
79 enum Flags { | |
80 FIRST_PACKET = 1; | |
81 LAST_PACKET = 2; | |
82 } | |
83 optional int32 flags = 1 [default = 0]; | |
84 | |
85 // The sequence number of the partial data for updating a rectangle. | |
86 optional int32 sequence_number = 2 [default = 0]; | |
87 | |
88 // This is provided on the first packet of the rectangle data, when | |
89 // the flags has FIRST_PACKET set. | |
90 optional VideoPacketFormat format = 3; | |
91 | |
92 optional bytes data = 4; | |
93 } | |
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