// Copyright 2020 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.
//
// This file is based on and intended as a replacement for Chrome's
// /media/remoting/media_remoting_rpc.proto file. Structurally, the messaging
// and enums are a reflection of Chrome's media stack. NOTE: all content
// encryption related messaging has been removed, and replaced with `reserved`
// keyword usages below.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;

package openscreen.cast;

// DecoderBuffer information which will be sent using RTP packets. The actual
// decoder buffer is not included in this proto data structure.
message DecoderBuffer {
  reserved 4, 7;
  reserved "decrypt_config", "splice_timestamp_usec";

  optional int64 timestamp_usec = 1;
  optional int64 duration_usec = 2;
  optional bool is_key_frame = 3;
  optional int64 front_discard_usec = 5;
  optional int64 back_discard_usec = 6;
  optional bytes side_data = 8;

  // To distinguish from valid 0-length buffers
  optional bool is_eos = 9;
}

message Size {
  optional int32 width = 1;
  optional int32 height = 2;
}

message AudioDecoderConfig {
  reserved 2;
  reserved "encryption_scheme";

  // Proto version of Chrome's media::Codec.
  enum Codec {
    kUnknownAudioCodec = 0;
    kCodecAAC = 1;
    kCodecMP3 = 2;
    kCodecPCM = 3;
    kCodecVorbis = 4;
    kCodecFLAC = 5;
    kCodecAMR_NB = 6;
    kCodecAMR_WB = 7;
    kCodecPCM_MULAW = 8;
    kCodecGSM_MS = 9;
    kCodecPCM_S16BE = 10;
    kCodecPCM_S24BE = 11;
    kCodecOpus = 12;
    kCodecEAC3 = 13;
    kCodecPCM_ALAW = 14;
    kCodecALAC = 15;
    kCodecAC3 = 16;
    kCodecMpegHAudio = 17;
  }

  // Proto version of Chrome's media::SampleFormat.
  enum SampleFormat {
    kUnknownSampleFormat = 0;
    kSampleFormatU8 = 1;
    kSampleFormatS16 = 2;
    kSampleFormatS32 = 3;
    kSampleFormatF32 = 4;
    kSampleFormatPlanarS16 = 5;
    kSampleFormatPlanarF32 = 6;
    kSampleFormatPlanarS32 = 7;
    kSampleFormatS24 = 8;
    kSampleFormatAc3 = 9;
    kSampleFormatEac3 = 10;
    kSampleFormatMpegHAudio = 11;
    kSampleFormatPlanarU8 = 12;
  };

  // Proto version of Chrome's media::ChannelLayout.
  enum ChannelLayout {
    CHANNEL_LAYOUT_NONE = 0;
    CHANNEL_LAYOUT_UNSUPPORTED = 1;
    CHANNEL_LAYOUT_MONO = 2;
    CHANNEL_LAYOUT_STEREO = 3;
    CHANNEL_LAYOUT_2_1 = 4;
    CHANNEL_LAYOUT_SURROUND = 5;
    CHANNEL_LAYOUT_4_0 = 6;
    CHANNEL_LAYOUT_2_2 = 7;
    CHANNEL_LAYOUT_QUAD = 8;
    CHANNEL_LAYOUT_5_0 = 9;
    CHANNEL_LAYOUT_5_1 = 10;
    CHANNEL_LAYOUT_5_0_BACK = 11;
    CHANNEL_LAYOUT_5_1_BACK = 12;
    CHANNEL_LAYOUT_7_0 = 13;
    CHANNEL_LAYOUT_7_1 = 14;
    CHANNEL_LAYOUT_7_1_WIDE = 15;
    CHANNEL_LAYOUT_STEREO_DOWNMIX = 16;
    CHANNEL_LAYOUT_2POINT1 = 17;
    CHANNEL_LAYOUT_3_1 = 18;
    CHANNEL_LAYOUT_4_1 = 19;
    CHANNEL_LAYOUT_6_0 = 20;
    CHANNEL_LAYOUT_6_0_FRONT = 21;
    CHANNEL_LAYOUT_HEXAGONAL = 22;
    CHANNEL_LAYOUT_6_1 = 23;
    CHANNEL_LAYOUT_6_1_BACK = 24;
    CHANNEL_LAYOUT_6_1_FRONT = 25;
    CHANNEL_LAYOUT_7_0_FRONT = 26;
    CHANNEL_LAYOUT_7_1_WIDE_BACK = 27;
    CHANNEL_LAYOUT_OCTAGONAL = 28;
    CHANNEL_LAYOUT_DISCRETE = 29;
    CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC = 30;
    CHANNEL_LAYOUT_4_1_QUAD_SIDE = 31;
    CHANNEL_LAYOUT_BITSTREAM = 32;
  };

  optional Codec codec = 1;
  optional SampleFormat sample_format = 3;
  optional ChannelLayout channel_layout = 4;
  optional int32 samples_per_second = 5;
  optional int64 seek_preroll_usec = 6;
  optional int32 codec_delay = 7;
  optional bytes extra_data = 8;
}

message Rect {
  optional int32 x = 1;
  optional int32 y = 2;
  optional int32 width = 3;
  optional int32 height = 4;
}

message VideoDecoderConfig {
  reserved 2;
  reserved "encryption_scheme";

  // Proto version of Chrome's media::VideoCodec.
  enum Codec {
    kUnknownVideoCodec = 0;
    kCodecH264 = 1;
    kCodecVC1 = 2;
    kCodecMPEG2 = 3;
    kCodecMPEG4 = 4;
    kCodecTheora = 5;
    kCodecVP8 = 6;
    kCodecVP9 = 7;
    kCodecHEVC = 8;
    kCodecDolbyVision = 9;
    kCodecAV1 = 10;
  }

  // Proto version of Chrome's media::VideoCodecProfile.
  enum Profile {
    VIDEO_CODEC_PROFILE_UNKNOWN = -1;
    H264PROFILE_BASELINE = 0;
    H264PROFILE_MAIN = 1;
    H264PROFILE_EXTENDED = 2;
    H264PROFILE_HIGH = 3;
    H264PROFILE_HIGH10PROFILE = 4;
    H264PROFILE_HIGH422PROFILE = 5;
    H264PROFILE_HIGH444PREDICTIVEPROFILE = 6;
    H264PROFILE_SCALABLEBASELINE = 7;
    H264PROFILE_SCALABLEHIGH = 8;
    H264PROFILE_STEREOHIGH = 9;
    H264PROFILE_MULTIVIEWHIGH = 10;
    VP8PROFILE_ANY = 11;
    VP9PROFILE_PROFILE0 = 12;
    VP9PROFILE_PROFILE1 = 13;
    VP9PROFILE_PROFILE2 = 14;
    VP9PROFILE_PROFILE3 = 15;
    HEVCPROFILE_MAIN = 16;
    HEVCPROFILE_MAIN10 = 17;
    HEVCPROFILE_MAIN_STILL_PICTURE = 18;
    DOLBYVISION_PROFILE0 = 19;
    DOLBYVISION_PROFILE4 = 20;
    DOLBYVISION_PROFILE5 = 21;
    DOLBYVISION_PROFILE7 = 22;
    THEORAPROFILE_ANY = 23;
    AV1PROFILE_PROFILE_MAIN = 24;
    AV1PROFILE_PROFILE_HIGH = 25;
    AV1PROFILE_PROFILE_PRO = 26;
    DOLBYVISION_PROFILE8 = 27;
    DOLBYVISION_PROFILE9 = 28;
  };

  // Proto version of Chrome's media::VideoPixelFormat.
  enum Format {
    reserved 8, 25;
    reserved "PIXEL_FORMAT_UYVY", "PIXEL_FORMAT_Y8";

    PIXEL_FORMAT_UNKNOWN = 0;
    PIXEL_FORMAT_I420 = 1;
    PIXEL_FORMAT_YV12 = 2;
    PIXEL_FORMAT_I422 = 3;
    PIXEL_FORMAT_I420A = 4;
    PIXEL_FORMAT_I444 = 5;
    PIXEL_FORMAT_NV12 = 6;
    PIXEL_FORMAT_NV21 = 7;
    PIXEL_FORMAT_YUY2 = 9;
    PIXEL_FORMAT_ARGB = 10;
    PIXEL_FORMAT_XRGB = 11;
    PIXEL_FORMAT_RGB24 = 12;
    PIXEL_FORMAT_RGB32 = 13;
    PIXEL_FORMAT_MJPEG = 14;
    PIXEL_FORMAT_YUV420P9 = 16;
    PIXEL_FORMAT_YUV420P10 = 17;
    PIXEL_FORMAT_YUV422P9 = 18;
    PIXEL_FORMAT_YUV422P10 = 19;
    PIXEL_FORMAT_YUV444P9 = 20;
    PIXEL_FORMAT_YUV444P10 = 21;
    PIXEL_FORMAT_YUV420P12 = 22;
    PIXEL_FORMAT_YUV422P12 = 23;
    PIXEL_FORMAT_YUV444P12 = 24;
    PIXEL_FORMAT_Y16 = 26;
    PIXEL_FORMAT_ABGR = 27;
    PIXEL_FORMAT_XBGR = 28;
    PIXEL_FORMAT_P016LE = 29;
    PIXEL_FORMAT_XR30 = 30;
    PIXEL_FORMAT_XB30 = 31;
  };

  // Proto version of Chrome's media::ColorSpace.
  enum ColorSpace {
    COLOR_SPACE_UNSPECIFIED = 0;
    COLOR_SPACE_JPEG = 1;
    COLOR_SPACE_HD_REC709 = 2;
    COLOR_SPACE_SD_REC601 = 3;
  };

  optional Codec codec = 1;
  optional Profile profile = 3;
  optional Format format = 4;
  optional ColorSpace color_space = 5;
  optional Size coded_size = 6;
  optional Rect visible_rect = 7;
  optional Size natural_size = 8;
  optional bytes extra_data = 9;
}

message AudioDecoderInfo {
  reserved 3;
  optional int64 decoder_type = 1;
  optional bool is_platform_decoder = 2;
};

message VideoDecoderInfo {
  reserved 3;
  optional int64 decoder_type = 1;
  optional bool is_platform_decoder = 2;
};

message PipelineStatistics {
  optional uint64 audio_bytes_decoded = 1;
  optional uint64 video_bytes_decoded = 2;
  optional uint32 video_frames_decoded = 3;
  optional uint32 video_frames_dropped = 4;
  optional int64 audio_memory_usage = 5;
  optional int64 video_memory_usage = 6;
  optional int64 video_frame_duration_average_usec = 7;
  optional AudioDecoderInfo audio_decoder_info = 8;
  optional VideoDecoderInfo video_decoder_info = 9;
};

message AcquireDemuxer {
  optional int32 audio_demuxer_handle = 1;
  optional int32 video_demuxer_handle = 2;
}

message RendererInitialize {
  optional int32 client_handle = 1;
  optional int32 audio_demuxer_handle = 2;
  optional int32 video_demuxer_handle = 3;
  optional int32 callback_handle = 4;
}

message RendererFlushUntil {
  optional uint32 audio_count = 1;
  optional uint32 video_count = 2;
  optional int32 callback_handle = 3;
}

message RendererClientOnTimeUpdate {
  optional int64 time_usec = 1;
  optional int64 max_time_usec = 2;
}

message RendererClientOnBufferingStateChange {
  // Proto version of Chrome's media::BufferingState.
  enum State {
    BUFFERING_HAVE_NOTHING = 0;
    BUFFERING_HAVE_ENOUGH = 1;
  };

  optional State state = 1;
}

message RendererClientOnAudioConfigChange {
  optional AudioDecoderConfig audio_decoder_config = 1;
}

message RendererClientOnVideoConfigChange {
  optional VideoDecoderConfig video_decoder_config = 1;
}

message DemuxerStreamReadUntil {
  optional int32 callback_handle = 1;
  optional uint32 count = 2;
}

message DemuxerStreamInitializeCallback {
  optional int32 type = 1;
  optional AudioDecoderConfig audio_decoder_config = 2;
  optional VideoDecoderConfig video_decoder_config = 3;
}

message DemuxerStreamReadUntilCallback {
  // Proto version of Chrome's media::DemuxerStream::Status.
  enum Status {
    kOk = 0;
    kAborted = 1;
    kConfigChanged = 2;
    kError = 3;
  };

  optional Status status = 1;
  optional uint32 count = 2;
  optional AudioDecoderConfig audio_decoder_config = 3;
  optional VideoDecoderConfig video_decoder_config = 4;
}

message RpcMessage {
  enum RpcProc {
    reserved 3, 4, 1005, 2007, 2008, 4000 to 5003;

    // NOTE: Since ContentDecryptionModule is also deprecated, do not add new
    // enum values that begin with "RPC_CDM_".
    reserved "RPC_ACQUIRE_CDM", "RPC_ACQUIRE_CDM_DONE",
        "RPC_RC_ONWAITINGFORDECRYPTIONKEY", "RPC_RC_ONDURATIONCHANGE",
        "RPC_R_SETCDM";

    // Remoting setup
    RPC_INTERNAL = 0;
    RPC_ACQUIRE_RENDERER = 1;
    RPC_ACQUIRE_RENDERER_DONE = 2;
    RPC_ACQUIRE_DEMUXER = 5;

    // Renderer message
    RPC_R_INITIALIZE = 1000;
    RPC_R_FLUSHUNTIL = 1001;
    RPC_R_STARTPLAYINGFROM = 1002;
    RPC_R_SETPLAYBACKRATE = 1003;
    RPC_R_SETVOLUME = 1004;

    // Renderer callbacks
    RPC_R_INITIALIZE_CALLBACK = 1100;
    RPC_R_FLUSHUNTIL_CALLBACK = 1101;
    RPC_R_SETCDM_CALLBACK = 1102;

    // Renderer client message
    RPC_RC_ONTIMEUPDATE = 2000;
    RPC_RC_ONBUFFERINGSTATECHANGE = 2001;
    RPC_RC_ONENDED = 2002;
    RPC_RC_ONERROR = 2003;
    RPC_RC_ONVIDEONATURALSIZECHANGE = 2004;
    RPC_RC_ONVIDEOOPACITYCHANGE = 2005;
    RPC_RC_ONSTATISTICSUPDATE = 2006;
    RPC_RC_ONAUDIOCONFIGCHANGE = 2009;
    RPC_RC_ONVIDEOCONFIGCHANGE = 2010;

    // DemuxerStream message
    RPC_DS_INITIALIZE = 3000;
    RPC_DS_READUNTIL = 3001;
    RPC_DS_ENABLEBITSTREAMCONVERTER = 3002;
    RPC_DS_ONERROR = 3003;

    // DemuxerStream callbacks
    RPC_DS_INITIALIZE_CALLBACK = 3100;
    RPC_DS_READUNTIL_CALLBACK = 3101;
  };

  // Component base of RPC message handle. This allows both sender and receiver
  // to send or handle message in desired individual components.
  optional int32 handle = 1;

  // RpcProc of this RPC message
  optional RpcProc proc = 2;

  oneof rpc_oneof {
    // NOTE: reserved keyword is not supported by oneof.
    // reserved 102, 500 to 506, 600 to 603

    // For simple RPC which only passes one parameters can use the following
    // various data type variables without using specific proto data structure.
    // RPC_ACQUIRE_RENDERER
    // RPC_ACQUIRE_RENDERER_DONE
    // RPC_ACQUIRE_CDM
    // RPC_ACQUIRE_CDM_DONE
    // RPC_DS_INITIALIZE_CALLBACK
    // RPC_DS_READ
    // RPC_CDM_SETCLIENT
    int32 integer_value = 3;

    // RPC_R_STARTPLAYINGFROM
    // RPC_RC_ONDURATIONCHANGE
    int64 integer64_value = 4;

    // RPC_R_SETPLAYBACKRATE
    // RPC_R_SETVOLUME
    double double_value = 5;

    // RPC_R_INITIALIZE_CALLBACK
    // RPC_R_SETCDM_CALLBACK
    // RPC_RC_ONVIDEOOPACITYCHANGE
    bool boolean_value = 6;

    // string only:
    // RPC_CDMC_ONSESSIONCLOSED
    string string_value = 7;

    // RPC_R_INITIALIZE
    RendererInitialize renderer_initialize_rpc = 100;

    // RPC_R_FLUSHUNTIL
    RendererFlushUntil renderer_flushuntil_rpc = 101;

    // RPC_ACQUIRE_DEMUXER
    AcquireDemuxer acquire_demuxer_rpc = 103;

    // RPC_RC_ONTIMEUPDATE
    RendererClientOnTimeUpdate rendererclient_ontimeupdate_rpc = 200;
    // RPC_RC_ONVIDEONATURALSIZECHANGE
    Size rendererclient_onvideonatualsizechange_rpc = 201;
    // RPC_RC_ONSTATISTICSUPDATE
    PipelineStatistics rendererclient_onstatisticsupdate_rpc = 202;
    // RPC_RC_ONBUFFERINGSTATECHANGE
    RendererClientOnBufferingStateChange
        rendererclient_onbufferingstatechange_rpc = 203;
    // RPC_RC_ONAUDIOCONFIGCHANGE
    RendererClientOnAudioConfigChange rendererclient_onaudioconfigchange_rpc =
        204;
    // RPC_RC_ONVIDEOCONFIGCHANGE
    RendererClientOnVideoConfigChange rendererclient_onvideoconfigchange_rpc =
        205;

    // RPC_DS_READUNTIL
    DemuxerStreamReadUntil demuxerstream_readuntil_rpc = 300;

    // RPC_DS_INITIALIZE_CALLBACK
    DemuxerStreamInitializeCallback demuxerstream_initializecb_rpc = 400;
    // RPC_DS_READUNTIL_CALLBACK
    DemuxerStreamReadUntilCallback demuxerstream_readuntilcb_rpc = 401;
  };
}