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Editing: StreamingAudioConfig.php

<?php
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: google/cloud/texttospeech/v1/cloud_tts.proto

namespace Google\Cloud\TextToSpeech\V1;

use Google\Protobuf\Internal\GPBType;
use Google\Protobuf\Internal\RepeatedField;
use Google\Protobuf\Internal\GPBUtil;

/**
 * Description of the desired output audio data.
 *
 * Generated from protobuf message <code>google.cloud.texttospeech.v1.StreamingAudioConfig</code>
 */
class StreamingAudioConfig extends \Google\Protobuf\Internal\Message
{
    /**
     * Required. The format of the audio byte stream.
     * Streaming supports PCM, ALAW, MULAW and OGG_OPUS. All other encodings
     * return an error.
     *
     * Generated from protobuf field <code>.google.cloud.texttospeech.v1.AudioEncoding audio_encoding = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     */
    protected $audio_encoding = 0;
    /**
     * Optional. The synthesis sample rate (in hertz) for this audio.
     *
     * Generated from protobuf field <code>int32 sample_rate_hertz = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
     */
    protected $sample_rate_hertz = 0;
    /**
     * Optional. Input only. Speaking rate/speed, in the range [0.25, 2.0]. 1.0 is
     * the normal native speed supported by the specific voice. 2.0 is twice as
     * fast, and 0.5 is half as fast. If unset(0.0), defaults to the native 1.0
     * speed. Any other values < 0.25 or > 2.0 will return an error.
     *
     * Generated from protobuf field <code>double speaking_rate = 3 [(.google.api.field_behavior) = INPUT_ONLY, (.google.api.field_behavior) = OPTIONAL];</code>
     */
    protected $speaking_rate = 0.0;

/**
     * Constructor.
     *
     * @param array $data {
     *     Optional. Data for populating the Message object.
     *
     *     @type int $audio_encoding
     *           Required. The format of the audio byte stream.
     *           Streaming supports PCM, ALAW, MULAW and OGG_OPUS. All other encodings
     *           return an error.
     *     @type int $sample_rate_hertz
     *           Optional. The synthesis sample rate (in hertz) for this audio.
     *     @type float $speaking_rate
     *           Optional. Input only. Speaking rate/speed, in the range [0.25, 2.0]. 1.0 is
     *           the normal native speed supported by the specific voice. 2.0 is twice as
     *           fast, and 0.5 is half as fast. If unset(0.0), defaults to the native 1.0
     *           speed. Any other values < 0.25 or > 2.0 will return an error.
     * }
     */
    public function __construct($data = NULL) {
        \GPBMetadata\Google\Cloud\Texttospeech\V1\CloudTts::initOnce();
        parent::__construct($data);
    }

/**
     * Required. The format of the audio byte stream.
     * Streaming supports PCM, ALAW, MULAW and OGG_OPUS. All other encodings
     * return an error.
     *
     * Generated from protobuf field <code>.google.cloud.texttospeech.v1.AudioEncoding audio_encoding = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     * @return int
     */
    public function getAudioEncoding()
    {
        return $this->audio_encoding;
    }

/**
     * Required. The format of the audio byte stream.
     * Streaming supports PCM, ALAW, MULAW and OGG_OPUS. All other encodings
     * return an error.
     *
     * Generated from protobuf field <code>.google.cloud.texttospeech.v1.AudioEncoding audio_encoding = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     * @param int $var
     * @return $this
     */
    public function setAudioEncoding($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\TextToSpeech\V1\AudioEncoding::class);
        $this->audio_encoding = $var;

return $this;
    }

/**
     * Optional. The synthesis sample rate (in hertz) for this audio.
     *
     * Generated from protobuf field <code>int32 sample_rate_hertz = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
     * @return int
     */
    public function getSampleRateHertz()
    {
        return $this->sample_rate_hertz;
    }

/**
     * Optional. The synthesis sample rate (in hertz) for this audio.
     *
     * Generated from protobuf field <code>int32 sample_rate_hertz = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
     * @param int $var
     * @return $this
     */
    public function setSampleRateHertz($var)
    {
        GPBUtil::checkInt32($var);
        $this->sample_rate_hertz = $var;

return $this;
    }

/**
     * Optional. Input only. Speaking rate/speed, in the range [0.25, 2.0]. 1.0 is
     * the normal native speed supported by the specific voice. 2.0 is twice as
     * fast, and 0.5 is half as fast. If unset(0.0), defaults to the native 1.0
     * speed. Any other values < 0.25 or > 2.0 will return an error.
     *
     * Generated from protobuf field <code>double speaking_rate = 3 [(.google.api.field_behavior) = INPUT_ONLY, (.google.api.field_behavior) = OPTIONAL];</code>
     * @return float
     */
    public function getSpeakingRate()
    {
        return $this->speaking_rate;
    }

/**
     * Optional. Input only. Speaking rate/speed, in the range [0.25, 2.0]. 1.0 is
     * the normal native speed supported by the specific voice. 2.0 is twice as
     * fast, and 0.5 is half as fast. If unset(0.0), defaults to the native 1.0
     * speed. Any other values < 0.25 or > 2.0 will return an error.
     *
     * Generated from protobuf field <code>double speaking_rate = 3 [(.google.api.field_behavior) = INPUT_ONLY, (.google.api.field_behavior) = OPTIONAL];</code>
     * @param float $var
     * @return $this
     */
    public function setSpeakingRate($var)
    {
        GPBUtil::checkDouble($var);
        $this->speaking_rate = $var;

return $this;
    }

}

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