1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef PC_DTMF_SENDER_H_
#define PC_DTMF_SENDER_H_
#include <stdint.h>
#include <string>
#include "api/dtmf_sender_interface.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "api/task_queue/task_queue_base.h"
#include "pc/proxy.h"
#include "rtc_base/ref_count.h"
#include "rtc_base/thread_annotations.h"
// DtmfSender is the native implementation of the RTCDTMFSender defined by
// the WebRTC W3C Editor's Draft.
// https://w3c.github.io/webrtc-pc/#rtcdtmfsender
namespace webrtc {
// This interface is called by DtmfSender to talk to the actual audio channel
// to send DTMF.
class DtmfProviderInterface {
public:
// Returns true if the audio sender is capable of sending DTMF. Otherwise
// returns false.
virtual bool CanInsertDtmf() = 0;
// Sends DTMF `code`.
// The `duration` indicates the length of the DTMF tone in ms.
// Returns true on success and false on failure.
virtual bool InsertDtmf(int code, int duration) = 0;
protected:
virtual ~DtmfProviderInterface() {}
};
class DtmfSender : public DtmfSenderInterface {
public:
static rtc::scoped_refptr<DtmfSender> Create(TaskQueueBase* signaling_thread,
DtmfProviderInterface* provider);
void OnDtmfProviderDestroyed();
// Implements DtmfSenderInterface.
void RegisterObserver(DtmfSenderObserverInterface* observer) override;
void UnregisterObserver() override;
bool CanInsertDtmf() override;
bool InsertDtmf(const std::string& tones,
int duration,
int inter_tone_gap,
int comma_delay = kDtmfDefaultCommaDelayMs) override;
std::string tones() const override;
int duration() const override;
int inter_tone_gap() const override;
int comma_delay() const override;
protected:
DtmfSender(TaskQueueBase* signaling_thread, DtmfProviderInterface* provider);
virtual ~DtmfSender();
DtmfSender(const DtmfSender&) = delete;
DtmfSender& operator=(const DtmfSender&) = delete;
private:
DtmfSender();
void QueueInsertDtmf(uint32_t delay_ms) RTC_RUN_ON(signaling_thread_);
// The DTMF sending task.
void DoInsertDtmf() RTC_RUN_ON(signaling_thread_);
void StopSending() RTC_RUN_ON(signaling_thread_);
DtmfSenderObserverInterface* observer_ RTC_GUARDED_BY(signaling_thread_);
TaskQueueBase* const signaling_thread_;
DtmfProviderInterface* provider_ RTC_GUARDED_BY(signaling_thread_);
std::string tones_ RTC_GUARDED_BY(signaling_thread_);
int duration_ RTC_GUARDED_BY(signaling_thread_);
int inter_tone_gap_ RTC_GUARDED_BY(signaling_thread_);
int comma_delay_ RTC_GUARDED_BY(signaling_thread_);
// For cancelling the tasks which feed the DTMF provider one tone at a time.
rtc::scoped_refptr<PendingTaskSafetyFlag> safety_flag_ RTC_GUARDED_BY(
signaling_thread_) RTC_PT_GUARDED_BY(signaling_thread_) = nullptr;
};
// Define proxy for DtmfSenderInterface.
BEGIN_PRIMARY_PROXY_MAP(DtmfSender)
PROXY_PRIMARY_THREAD_DESTRUCTOR()
PROXY_METHOD1(void, RegisterObserver, DtmfSenderObserverInterface*)
PROXY_METHOD0(void, UnregisterObserver)
PROXY_METHOD0(bool, CanInsertDtmf)
PROXY_METHOD4(bool, InsertDtmf, const std::string&, int, int, int)
PROXY_CONSTMETHOD0(std::string, tones)
PROXY_CONSTMETHOD0(int, duration)
PROXY_CONSTMETHOD0(int, inter_tone_gap)
PROXY_CONSTMETHOD0(int, comma_delay)
END_PROXY_MAP(DtmfSender)
// Get DTMF code from the DTMF event character.
bool GetDtmfCode(char tone, int* code);
} // namespace webrtc
#endif // PC_DTMF_SENDER_H_
|
