PHP调用科大讯飞语音服务

PHP调用科大讯飞语音服务

最近在做微信小程序，需要做语音识别，选择了国内很有名的讯飞语音。
我的后台是PHP，在接入过程中走了一些坑，在这里分享出来希望可以帮助需要的朋友

准备工作

1. 申请讯飞帐号http://www.xfyun.cn/
   
2. 添加IP白名单（5-10分钟生效）
3. 准备一个音频文件（wav或pcm格式）
4. 获取APPID和APPKEY（每个服务的APPKEY不同）

const APP_ID = 'xxxx';
const APP_KEY_IAT = 'xxxx'; //语音听写APPKEY
const APP_KEY_ISE = 'xxxx'; //语音评测APPKEY
const APP_KEY_TTS = 'xxxx'; //语音合成APPKEY

---

语音听写

public function voiceIat($file_path)
{
    $param = [
        'engine_type' => 'sms16k',
        'aue' => 'raw'
    ];
    $cur_time = (string)time();
    $x_param = base64_encode(json_encode($param));
    $header_data = [
        'X-Appid:'.self::APP_ID,
        'X-CurTime:'.$cur_time,
        'X-Param:'.$x_param,
        'X-CheckSum:'.md5(self::APP_KEY_IAT.$cur_time.$x_param),
        'Content-Type:application/x-www-form-urlencoded; charset=utf-8'
    ];

    //Body
    $file_path = $file_path;
    $file_content = file_get_contents($file_path);
    $body_data = 'audio='.urlencode(base64_encode($file_content));

    //Request
    $url = "http://api.xfyun.cn/v1/service/v1/iat";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header_data);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $body_data);
    $result = curl_exec($ch);
    curl_close($ch);

    return $result;
}

语音听写示例：

voiceIat('a.wav');

---

语音评测

public function voiceIse($file_path, $content)
{
    $param = [
        'language' => 'cn',
        'aue' => 'raw',
        'category' => 'read_sentence'
    ];
    $cur_time = (string)time();
    $x_param = base64_encode(json_encode($param));
    $header_data = [
        'X-Appid:'.self::APP_ID,
        'X-CurTime:'.$cur_time,
        'X-Param:'.$x_param,
        'X-CheckSum:'.md5(self::APP_KEY_ISE.$cur_time.$x_param),
        'Content-Type:application/x-www-form-urlencoded; charset=utf-8'
    ];

    //Body
    $file_path = $file_path;
    $file_content = file_get_contents($file_path);
    $body_data = 'audio='.urlencode(base64_encode($file_content)).'&text='.urlencode($content);

    $url = "http://api.xfyun.cn/v1/service/v1/ise";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header_data);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $body_data);

    $result = curl_exec($ch);
    curl_close($ch);

    return $result;
}

语音评测示例：

echo voiceIse('a.wav', '科大讯飞真给力');

---

语音合成

public function voiceTts($content, $output_path)
{
    $param = [
        'engine_type' => 'intp65',
        'auf' => 'audio/L16;rate=16000',
        'aue' => 'raw',
        'voice_name' => 'xiaoyan',
        'speed' => '0'
    ];
    $cur_time = (string)time();
    $x_param = base64_encode(json_encode($param));
    $header_data = [
        'X-Appid:'.self::APP_ID,
        'X-CurTime:'.$cur_time,
        'X-Param:'.$x_param,
        'X-CheckSum:'.md5(self::APP_KEY_TTS.$cur_time.$x_param),
        'Content-Type:application/x-www-form-urlencoded; charset=utf-8'
    ];

    //Body
    $body_data = 'text='.urlencode($content);

    //Request
    $url = "http://api.xfyun.cn/v1/service/v1/tts";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, TRUE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header_data);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $body_data);
    $result = curl_exec($ch);

    $res_header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
    $res_header = substr($result, 0, $res_header_size);
    curl_close($ch);

    if(stripos($res_header, 'Content-Type: audio/mpeg') === FALSE){ //合成错误
        return substr($result, $res_header_size);
    }else{
        file_put_contents($output_path, substr($result, $res_header_size));
        return '语音合成成功，请查看文件！';
    }
}

语音合成示例：

echo voiceTts('科大讯飞真给力', 'a.wav');