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// 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.
// Protocol for video messages.
syntax = "proto2";
option optimize_for = LITE_RUNTIME;
package remoting;
message VideoPacketFormat {
// Reserved fields IDs used for removed fields: 1 to 4.
// Identifies how the image was encoded.
enum Encoding {
ENCODING_INVALID = -1;
ENCODING_VERBATIM = 0;
ENCODING_ZLIB = 1;
ENCODING_VP8 = 2;
ENCODING_VP9 = 3;
};
// The encoding used for this image update.
optional Encoding encoding = 5 [default = ENCODING_INVALID];
// Width and height of the whole screen.
optional int32 screen_width = 6;
optional int32 screen_height = 7;
// Horizontal and vertical DPI of the screen. If either of these is zero or
// unset, the corresponding DPI should be assumed to be 96 (Windows' default)
optional int32 x_dpi = 8;
optional int32 y_dpi = 9;
}
message Rect {
optional int32 x = 1;
optional int32 y = 2;
optional int32 width = 3;
optional int32 height = 4;
}
message VideoPacket {
// Reserved fields IDs used for removed fields: 1 to 3, 10, 11.
optional VideoPacketFormat format = 4;
optional bytes data = 5;
// List of rectangles updated by this frame.
repeated Rect dirty_rects = 6;
// Time in milliseconds spent in capturing this video frame.
optional int64 capture_time_ms = 7;
// Time in milliseconds spent in encoding this video frame.
optional int64 encode_time_ms = 8;
// The client's timestamp of the latest event received by the host before
// starting to capture this video frame.
optional int64 latest_event_timestamp = 9;
// Optional frame timestamp. Used in tests to estimate frame latency.
optional int64 timestamp = 12;
// Frame identifier used to match VideoFrame and VideoAck.
optional int32 frame_id = 13;
// Time from when the last event was received until capturing has started.
optional int64 capture_pending_time_ms = 14;
// Total overhead time for IPC and threading when capturing frames.
optional int64 capture_overhead_time_ms = 15;
// Time between when the frame was captured and when encoder started encoding
// it.
optional int64 encode_pending_time_ms = 16;
// Time for which the frame is blocked until it's sent to the client.
optional int64 send_pending_time_ms = 17;
}
// VideoAck acknowledges that the frame in the VideoPacket with the same
// frame_id has been rendered. VideoAck messages must be sent only for frames
// that have frame_id field set. They must be sent the same order in which
// the corresponding VideoPackets were received.
message VideoAck {
// Frame ID.
optional int32 frame_id = 1;
}
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