Error using a config file for TTS

[Applevangelist]

If you create a config file, it gets loaded but the lua environment in DCS will throw this error

2023-10-13 11:32:03.329 ERROR   SCRIPTING (Main): Mission script error: attempt to concatenate a userdata value
stack traceback:
    [C]: ?
    [C]: in function 'start'
    [string "C:\Users\post\Saved Games\DCS\Scripts\DCS-gRPC\grpc.lua"]:12: in function 'f'
    [string "C:\Users\post\Saved Games\DCS\Scripts\DCS-gRPC\grpc-mission.lua"]:59: in function 'load'
    [string "C:\Users\post\Saved Games\DCS\Missions\test19.lua"]:4: in main chunk
    [string "assert(loadfile("C:\\Users\\post\\Saved Games\\DCS\\Missions\\test19.lua"))()"]:1: in main chunk

which refers back to

if isMissionEnv then
  grpc.start({
    writeDir = lfs.writedir(),
    dllPath = GRPC.dllPath,
    host = GRPC.host,
    port = GRPC.port,
    debug = GRPC.debug,
    evalEnabled = GRPC.evalEnabled,
    tts = GRPC.tts,
    srs = GRPC.srs,
  })
end

-> in the grpc.start() function your are trying to concat a nil value, probably one of the pathes.

[rurounijones]

Can you provide an appropriately redacted config file that triggers this and confirm you have made the MissionScripting.lua changes (and that those changes are not getting replaced by something like SLMod)

[Applevangelist]

Sure, config looks like below. Let me stress it works if I'm not using the config file. MissionScripting.lua has also been redacted (not using SLMod) as per instructions

-- Whether the `Eval` method is enabled or not.
evalEnabled = false

-- The host the gRPC listens on (use "0.0.0.0" to listen on all IP addresses of the host).
host = "127.0.0.1"

-- The port to listen on.
port = 50051

-- Whether debug logging is enabled or not.
debug = true

-- Limit of calls per second that are executed inside of the mission scripting environment.
throughputLimit = 600

-- The default TTS provider to use if a TTS request does not explicitly specify another one.
tts.defaultProvider = "gcloud"

-- Your Google Cloudd access key.
tts.provider.gcloud.key = "<API Key Here>"

-- The default Google Cloud voice to use (see https://cloud.google.com/text-to-speech/docs/voices).
tts.provider.gcloud.defaultVoice = "en-GB-Standard-F"

-- The default Windows voice to use (see https://support.microsoft.com/en-us/windows/appendix-a-supported-languages-and-voices-4486e345-7730-53da-fcfe-55cc64300f01).
-- Requires at least Windows Server 2019 to work properly.
tts.provider.win.defaultVoice = "Hedda"

-- Your SRS server's address.
srs.addr = "127.0.0.1:5002"

[rurounijones]

I think there is an invisible character after the first " in the section below that may be causing issues.

tts.provider.gcloud.defaultVoice = "en-GB-Standard-F"

Could you delete everything after the = and type it in by hand to make sure there are no copy/paste encoding issues.

[Applevangelist]

That is not the issue, there's no extra character in my local file. Error is the same.

[Applevangelist]

Hint: I have the latest release pack. Franky has 0.7.0 and it reads the config no issues. Also, the lua files in the release pack do not match the dev tree

[rkusa]

Proper error gets swallowed due to #179. Can you check your Logs\grpc.log if it contains a more useful error?

[Applevangelist]

It doesn’t bc it’s not compiled with debug on and this happens before anything starts showing up in the logs. Let me see if I can compile a version with debug on and then on what it says.

[Applevangelist]

That wasn't helpful. Finding in between: I assume that the RPC cannot write to the tts structure you create in the mission environment, or it is not there, really. If you create the tts table from the mission before starting the config file is read and no error is thrown:

local tts = {}
tts.provider = {
  gcloud = {
    key = MSRS.APIKey,
    defaultVoice = MSRS.defaultVoice
  },
  defaultProvider = MSRS.GRPCOptions.DefaultProvider
}

GRPC.tts = tts
GRPC.debug = true
GRPC.integrityCheckDisabled = true

GRPC.load()

however, if you comment out the GRPC.tts = tts in the above example it is thrown. i.e. the load command in your lua files calling GRPC cannot write to the tts structure, hence the error

if isMissionEnv then
  assert(grpc.start({
    version = GRPC.version,
    writeDir = lfs.writedir(),
    dllPath = GRPC.dllPath,
    luaPath = GRPC.luaPath,
    host = GRPC.host,
    port = GRPC.port,
    debug = GRPC.debug,
    evalEnabled = GRPC.evalEnabled,
    integrityCheckDisabled = GRPC.integrityCheckDisabled,
    tts = GRPC.tts,
    srs = GRPC.srs,
  }))
end

possible the (basically empty) tts table is removed by the optimizer before you can even write to it.

[rkusa]

I think I found the culprit. The following change fixes your config:

- tts.defaultProvider = "gcloud"
+ tts.defaultProvider = "gCloud"

That is not intended, fixed in #243 to be the expected lowercase value.

[Applevangelist]

Confirmed working with the change