Pascal (Lazarus/Delphi)

IBM Cloud - Text to Speech - Synthesize Audio (POST)

See more IBM Text to Speech Examples

Synthesizes text to audio that is spoken in the specified voice. Uses a POST which allows for more text to be synthesized. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.StringBuilder,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  myBaseUrl: string;
  sbUrl: TStringBuilder;
  json: TJsonObject;
  url: string;
  resp: THttpResponse;
  respStatusCode: Integer;

begin
  success := False;

  //  This example assumes the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  http := THttp.Create;

  http.Login := 'apikey';
  http.Password := 'my_apikey';
  http.BasicAuth := True;

  //  Send the following request:

  //  curl -X POST -u "apikey:{apikey}" 
  //     --header "Content-Type: application/json" 
  //     --header "Accept: audio/wav" 
  //     --data "{\"text\":\"When life gives you lemons, order the lobster tail.\"}" 
  //     --output lobster.wav "{url}/v1/synthesize?voice=en-US_AllisonV3Voice"

  //  Use your base URL shown in the credentials web page (below your apikey)
  myBaseUrl := 'https://api.us-south.text-to-speech.watson.cloud.ibm.com/instances/31941e96-7b89-4d56-8993-9cd8f18ec2d8';

  sbUrl := TStringBuilder.Create;
  sbUrl.Append(myBaseUrl);
  sbUrl.Append('/v1/synthesize?voice=en-US_AllisonV3Voice');

  http.Accept := 'audio/wav';

  json := TJsonObject.Create;
  json.UpdateString('text','When life gives you lemons, order the lobster tail.');

  url := sbUrl.GetAsString();
  resp := THttpResponse.Create;
  success := http.HttpJson('POST',url,json,'application/json',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  respStatusCode := resp.StatusCode;
  WriteLn('response status code = ' + respStatusCode);

  if (respStatusCode = 200) then
    begin
      success := resp.SaveBodyBinary('qa_output/lobster.wav');
      WriteLn('Success!');
    end
  else
    begin
      WriteLn(resp.BodyStr);
    end;


  http.Free;
  sbUrl.Free;
  json.Free;
  resp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.