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72 lines
2.4 KiB
72 lines
2.4 KiB
/*
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* Copyright 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#import <Foundation/Foundation.h>
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#import "RTCMacros.h"
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NS_ASSUME_NONNULL_BEGIN
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RTC_OBJC_EXPORT
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@protocol RTC_OBJC_TYPE
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(RTCDtmfSender)<NSObject>
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/**
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* Returns true if this RTCDtmfSender is capable of sending DTMF. Otherwise
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* returns false. To be able to send DTMF, the associated RTCRtpSender must be
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* able to send packets, and a "telephone-event" codec must be negotiated.
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*/
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@property(nonatomic, readonly) BOOL canInsertDtmf;
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/**
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* Queues a task that sends the DTMF tones. The tones parameter is treated
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* as a series of characters. The characters 0 through 9, A through D, #, and *
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* generate the associated DTMF tones. The characters a to d are equivalent
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* to A to D. The character ',' indicates a delay of 2 seconds before
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* processing the next character in the tones parameter.
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*
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* Unrecognized characters are ignored.
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*
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* @param duration The parameter indicates the duration to use for each
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* character passed in the tones parameter. The duration cannot be more
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* than 6000 or less than 70 ms.
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*
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* @param interToneGap The parameter indicates the gap between tones.
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* This parameter must be at least 50 ms but should be as short as
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* possible.
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*
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* If InsertDtmf is called on the same object while an existing task for this
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* object to generate DTMF is still running, the previous task is canceled.
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* Returns true on success and false on failure.
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*/
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- (BOOL)insertDtmf:(nonnull NSString *)tones
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duration:(NSTimeInterval)duration
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interToneGap:(NSTimeInterval)interToneGap;
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/** The tones remaining to be played out */
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- (nonnull NSString *)remainingTones;
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/**
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* The current tone duration value. This value will be the value last set via the
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* insertDtmf method, or the default value of 100 ms if insertDtmf was never called.
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*/
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- (NSTimeInterval)duration;
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/**
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* The current value of the between-tone gap. This value will be the value last set
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* via the insertDtmf() method, or the default value of 50 ms if insertDtmf() was never
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* called.
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*/
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- (NSTimeInterval)interToneGap;
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@end
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NS_ASSUME_NONNULL_END
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