grpc descriptor not found

[jerevive]

swoole 

Swoole => enabled
Author => Swoole Team <[email protected]>
Version => 5.0.2
Built => Aug  8 2023 05:57:05
coroutine => enabled with boost asm context
epoll => enabled
eventfd => enabled
signalfd => enabled
spinlock => enabled
rwlock => enabled
openssl => OpenSSL 1.1.1v  1 Aug 2023
dtls => enabled
http2 => enabled
json => enabled
zlib => 1.2.12
brotli => E16777225/D16777225
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
async_redis => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => Off => Off
swoole.unixsock_buffer_size => 8388608 => 8388608

PHP 8.1.12 (cli) (built: Oct 28 2022 19:11:07) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.12, Copyright (c) Zend Technologies

Exception: Couldn't find descriptor. Note only generated code may derive from \Google\Protobuf\Internal\Message in /www/conversation/grpc/Protobuf/C2SAudio.php:30

<?php
/**
 * User: jesse
 * Date: 2023/8/7 15:31
 */

namespace App\Service;

use Google\Protobuf\Internal\GPBUtil;

use Hyperf\Grpc\Parser;
use Grpc\C2SAudio;


class AudioService
{

    public function handle($fd, $content)
    {

        /** @var C2SAudio $audio */
        $audio = Parser::deserializeMessage([C2SAudio::class, null], $content);

        var_dump($audio->getAudio());


        return $content;
    }
}

<?php
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: app/Proto/audio.proto

namespace Grpc;

use Google\Protobuf\Internal\GPBUtil;

/**
 * Generated from protobuf message <code>protobuf.C2SAudio</code>
 */
class C2SAudio extends \Google\Protobuf\Internal\Message
{
    /**
     * Generated from protobuf field <code>bytes audio = 1;</code>
     */
    protected $audio = '';

    /**
     * Constructor.
     *
     * @param array $data {
     *     Optional. Data for populating the Message object.
     *
     *     @type string $audio
     * }
     */
    public function __construct($data = NULL) {
        \GPBMetadata\Audio::initOnce();
        parent::__construct($data);
    }

    /**
     * Generated from protobuf field <code>bytes audio = 1;</code>
     * @return string
     */
    public function getAudio()
    {
        return $this->audio;
    }

    /**
     * Generated from protobuf field <code>bytes audio = 1;</code>
     * @param string $var
     * @return $this
     */
    public function setAudio($var)
    {
        GPBUtil::checkString($var, False);
        $this->audio = $var;

        return $this;
    }

}