(Delphi DLL) IBM Cloud - Text to Speech - Synthesize Audio (GET)

Synthesizes text to audio that is spoken in the specified voice.

For more information, see https://cloud.ibm.com/apidocs/text-to-speech#synthesize-audio-get

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, BinData;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
success: Boolean;
myBaseUrl: PWideChar;
sbUrl: HCkStringBuilder;
numReplaced: Integer;
textToSynthesize: PWideChar;
bdResponseBody: HCkBinData;
respStatusCode: Integer;

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

http := CkHttp_Create();

CkHttp_putLogin(http,'apikey');
CkHttp_putPassword(http,'my_apikey');
CkHttp_putBasicAuth(http,True);

// 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 := CkStringBuilder_Create();
CkStringBuilder_Append(sbUrl,myBaseUrl);
CkStringBuilder_Append(sbUrl,'/v1/synthesize?accept=ACCEPT_TYPE&voice=CHOSEN_VOICE&text=TEXT_TO_SYNTHESIZE');

// Choose "audio/wav" for the output file type.
numReplaced := CkStringBuilder_Replace(sbUrl,'ACCEPT_TYPE',CkHttp__urlEncode(http,'audio/wav'));
// See the choices for voices at https://cloud.ibm.com/apidocs/text-to-speech#synthesize-audio-get
numReplaced := CkStringBuilder_Replace(sbUrl,'CHOSEN_VOICE','en-US_MichaelVoice');
textToSynthesize := 'When life gives you lemons, order the lobster tail.';
numReplaced := CkStringBuilder_Replace(sbUrl,'TEXT_TO_SYNTHESIZE',CkHttp__urlEncode(http,textToSynthesize));

// Send the GET to synthesize the voice.
// The response file will be contained in bdResponseBody
bdResponseBody := CkBinData_Create();
success := CkHttp_QuickGetBd(http,CkStringBuilder__getAsString(sbUrl),bdResponseBody);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;
respStatusCode := CkHttp_getLastStatus(http);
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));

if (respStatusCode = 200) then
  begin
    success := CkBinData_WriteFile(bdResponseBody,'qa_output/lobster.wav');
    Memo1.Lines.Add('Success!');
  end
else
  begin
    Memo1.Lines.Add(CkBinData__getString(bdResponseBody,'utf-8'));
  end;

CkHttp_Dispose(http);
CkStringBuilder_Dispose(sbUrl);
CkBinData_Dispose(bdResponseBody);

end;