// Copyright 2014 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 audio messages.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;

package media.cast.proto;

// Keep in sync with media/cast/logging/logging_defines.h.
// For compatibility reasons, existing values in this enum must not be changed.
enum EventType {
  // Generic events.
  UNKNOWN = 0;
  RTT_MS = 1;
  PACKET_LOSS = 2;
  JITTER_MS = 3;
  VIDEO_ACK_RECEIVED = 4;
  REMB_BITRATE = 5;
  AUDIO_ACK_SENT = 6;
  VIDEO_ACK_SENT = 7;
  // Audio sender.
  AUDIO_FRAME_RECEIVED = 8;
  AUDIO_FRAME_CAPTURED = 9;
  AUDIO_FRAME_ENCODED = 10;
  // Audio receiver.
  AUDIO_PLAYOUT_DELAY = 11;
  AUDIO_FRAME_DECODED = 12;
  // Video sender.
  VIDEO_FRAME_CAPTURED = 13;
  VIEDO_FRAME_RECEIVED = 14;
  VIDEO_FRAME_SENT_TO_ENCODER = 15;
  VIDEO_FRAME_ENCODED = 16;
  // Video receiver.
  VIDEO_FRAME_DECODED = 17;
  VIDEO_RENDER_DELAY = 18;
  // Send-side packet events.
  PACKET_SENT_TO_PACER = 19;
  PACKET_SENT_TO_NETWORK = 20;
  PACKET_RETRANSMITTED = 21;
  // Receiver-side packet events.
  AUDIO_PACKET_RECEIVED = 22;
  VIDEO_PACKET_RECEIVED = 23;
  DUPLICATE_AUDIO_PACKET_RECEIVED = 24;
  DUPLICATE_VIDEO_PACKET_RECEIVED = 25;
}

message AggregatedFrameEvent {
  optional uint32 rtp_timestamp = 1;

  repeated EventType event_type = 2 [packed = true];
  repeated int64 event_timestamp_micros = 3 [packed = true];

  // Size is set only for kAudioFrameEncoded and kVideoFrameEncoded.
  optional int32 encoded_frame_size = 4;

  // Delay is only set for kAudioPlayoutDelay and kVideoRenderDelay.
  optional int32 delay_millis = 5;
};

message BasePacketEvent {
  optional int32 packet_id = 1;
  repeated EventType event_type = 2 [packed = true];
  repeated int64 event_timestamp_micros = 3 [packed = true];
}

message AggregatedPacketEvent {
  optional uint32 rtp_timestamp = 1;
  repeated BasePacketEvent base_packet_event = 2;
};

message AggregatedGenericEvent {
  optional EventType event_type = 1;
  repeated int64 event_timestamp_micros = 2 [packed = true];
  repeated int32 value = 3 [packed = true];
};