(Objective-C) 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 Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoHttp.h>
#import <NSString.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <CkoHttpResponse.h>

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

CkoHttp *http = [[CkoHttp alloc] init];
BOOL success;

http.Login = @"apikey";
http.Password = @"my_apikey";
http.BasicAuth = YES;

// 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)
NSString *myBaseUrl = @"https://api.us-south.text-to-speech.watson.cloud.ibm.com/instances/31941e96-7b89-4d56-8993-9cd8f18ec2d8";

CkoStringBuilder *sbUrl = [[CkoStringBuilder alloc] init];
[sbUrl Append: myBaseUrl];
[sbUrl Append: @"/v1/synthesize?voice=en-US_AllisonV3Voice"];

http.Accept = @"audio/wav";

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"text" value: @"When life gives you lemons, order the lobster tail."];

CkoHttpResponse *resp = [http PostJson3: [sbUrl GetAsString] contentType: @"application/json" json: json];
if (http.LastMethodSuccess == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

int respStatusCode = [resp.StatusCode intValue];
NSLog(@"%@%d",@"response status code = ",respStatusCode);

if (respStatusCode == 200) {
    success = [resp SaveBodyBinary: @"qa_output/lobster.wav"];
    NSLog(@"%@",@"Success!");
}
else {
    NSLog(@"%@",resp.BodyStr);
}