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

Synthesizes text to audio that is spoken in the specified voice. Uses a POST which allows for more text to be synthesized.

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

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, HttpResponse, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
success: Boolean;
myBaseUrl: PWideChar;
sbUrl: HCkStringBuilder;
json: HCkJsonObject;
resp: HCkHttpResponse;
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);

// 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 := CkStringBuilder_Create();
CkStringBuilder_Append(sbUrl,myBaseUrl);
CkStringBuilder_Append(sbUrl,'/v1/synthesize?voice=en-US_AllisonV3Voice');

CkHttp_putAccept(http,'audio/wav');

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'text','When life gives you lemons, order the lobster tail.');

resp := CkHttp_PostJson3(http,CkStringBuilder__getAsString(sbUrl),'application/json',json);
if (CkHttp_getLastMethodSuccess(http) = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;
respStatusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));

if (respStatusCode = 200) then
  begin
    success := CkHttpResponse_SaveBodyBinary(resp,'qa_output/lobster.wav');
    Memo1.Lines.Add('Success!');
  end
else
  begin
    Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));
  end;

CkHttpResponse_Dispose(resp);

CkHttp_Dispose(http);
CkStringBuilder_Dispose(sbUrl);
CkJsonObject_Dispose(json);

end;