语音合成初始化。// 一次初始化成功,可以反复调用合成和参数设置接口,不需要频繁初始化和释放,减少耗时
NSString * initParam = [self genInitParams];
[_nui nui_tts_initialize:[initParam UTF8String] logLevel:LOG_LEVEL_VERBOSE saveLog:true];
if (retcode != 0) {
// 初始化失败,通过"error_msg"查看详细的错误信息,离线语音合成FAQ文档中已列出常见错误
const char *errmsg = [_nui nui_tts_get_param: "error_msg"];
TLog(@"init failed.retcode:%d.errmsg:%s", retcode, errmsg);
// 初始化失败不需要再调用参数设置和合成接口
return;
}
其中,genInitParams生成为String JSON字符串,包含资源目录和[dictM setObject:@"xx" forKey:@"ak_id"];
[dictM setObject:@"xx" forKey:@"ak_secret"];
[dictM setObject:@"xx" forKey:@"app_key"];
[dictM setObject:@"software_nls_tts_offline" forKey:@"sdk_code"];
// deviceid作为设备的唯一标识(可以是Mac地址,cpu序列号等参数),是进行鉴权认证的必要信息
[dictM setObject:id_string forKey:@"device_id"];
// 设置工作路径
[dictM setObject:bundlePath forKey:@"workspace"];
// 切换为离线合成模式
[dictM setObject:@"0" forKey:@"mode_type"];
根据需求设置参数。// 加载语音包:已购买的语音包,可以放在任意位置,以aicheng为例,该语音包位于Documents/voices/下,设置命令为“aicheng:Documents/voices/aicheng”
NSString *cmd = [NSString stringWithFormat:@"%@/aicheng", myvoicedir];
[self.nui nui_tts_set_param:"extend_font_name" value:[cmd UTF8String]];
启动语音合成。[self.nui nui_tts_play:"1" taskId:"" text:[content UTF8String]];
回调处理。onNuiTtsEventCallback:语音合成事件回调,根据语音合成状态控制播放器。- (void)onNuiTtsEventCallback:(nuisdk::NuiSdkTtsEvent)event taskId:(char*)taskid code:(int)code {
TLog(@"onNuiTtsEventCallback event[%d]", event);
if (event == TTS_EVENT_START) {
// 表示合成开始
// 通知播放器准备播放
[self->_voicePlayer setstate:(PlayerState)playing];
dispatch_async(dispatch_get_main_queue(), ^{
[self->_voicePlayer play];
});
} else if (event == TTS_EVENT_END || event == TTS_EVENT_CANCEL || event == TTS_EVENT_ERROR) {
// 这三个事件都表示本条任务合成结束,对一条合成任务这三个事件只会触发其中一个:正常结束、正常取消或者发生错误
if (event == TTS_EVENT_END) {
// 注意这里是指语音合成完成,而非播放完成,播放完成需要由voicePlayer对象来进行通知
[self->_voicePlayer drain];
} else {
// 取消播报、或者发生异常时终止播放
[self->_voicePlayer setstate:(PlayerState)stopped];
dispatch_async(dispatch_get_main_queue(), ^{
[self.nui nui_tts_cancel:NULL];
[self->_voicePlayer stop];
});
}
}
}
onNuiTtsUserdataCallback:语音合成数据回调,将回调中的合成数据写入播放器进行播放。- (void)onNuiTtsUserdataCallback:(char*)info wordIdx:(int)info_len buffer:(char*)buffer len:(int)len taskId:(char*)task_id {
TLog(@"onnuiTtsUserdataCallback played info %s info_len %d", info, info_len);
[_voicePlayer write:(char*)buffer Length:(unsigned int)len];
}
取消语音合成。[self.nui nui_tts_cancel:NULL];