10e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org/* 20e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * libjingle 30e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * Copyright 2012, Google Inc. 40e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * 50e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * Redistribution and use in source and binary forms, with or without 60e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * modification, are permitted provided that the following conditions are met: 70e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * 80e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * 1. Redistributions of source code must retain the above copyright notice, 90e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * this list of conditions and the following disclaimer. 100e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * 2. Redistributions in binary form must reproduce the above copyright notice, 110e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * this list of conditions and the following disclaimer in the documentation 120e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * and/or other materials provided with the distribution. 130e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * 3. The name of the author may not be used to endorse or promote products 140e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * derived from this software without specific prior written permission. 150e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * 160e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 170e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 180e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 190e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 200e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 210e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 220e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 230e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 240e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 250e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 260e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org */ 270e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 280e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org#include "talk/app/webrtc/dtmfsender.h" 290e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 300e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org#include <ctype.h> 310e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 320e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org#include <string> 330e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 342a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.org#include "webrtc/base/logging.h" 352a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.org#include "webrtc/base/thread.h" 360e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 370e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgnamespace webrtc { 380e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 390e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgenum { 400e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org MSG_DO_INSERT_DTMF = 0, 410e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org}; 420e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 430e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// RFC4733 440e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// +-------+--------+------+---------+ 450e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// | Event | Code | Type | Volume? | 460e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// +-------+--------+------+---------+ 470e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// | 0--9 | 0--9 | tone | yes | 480e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// | * | 10 | tone | yes | 490e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// | # | 11 | tone | yes | 500e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// | A--D | 12--15 | tone | yes | 510e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// +-------+--------+------+---------+ 520e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// The "," is a special event defined by the WebRTC spec. It means to delay for 530e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// 2 seconds before processing the next tone. We use -1 as its code. 540e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const int kDtmfCodeTwoSecondDelay = -1; 550e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const int kDtmfTwoSecondInMs = 2000; 560e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const char kDtmfValidTones[] = ",0123456789*#ABCDabcd"; 570e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const char kDtmfTonesTable[] = ",0123456789*#ABCD"; 580e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// The duration cannot be more than 6000ms or less than 70ms. The gap between 590e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// tones must be at least 50 ms. 600e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const int kDtmfDefaultDurationMs = 100; 610e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const int kDtmfMinDurationMs = 70; 620e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const int kDtmfMaxDurationMs = 6000; 630e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const int kDtmfDefaultGapMs = 50; 640e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstatic const int kDtmfMinGapMs = 50; 650e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 660e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org// Get DTMF code from the DTMF event character. 670e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgbool GetDtmfCode(char tone, int* code) { 680e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Convert a-d to A-D. 690e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org char event = toupper(tone); 700e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org const char* p = strchr(kDtmfTonesTable, event); 710e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (!p) { 720e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return false; 730e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 740e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org *code = p - kDtmfTonesTable - 1; 750e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return true; 760e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 770e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 782a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.orgrtc::scoped_refptr<DtmfSender> DtmfSender::Create( 790e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org AudioTrackInterface* track, 802a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.org rtc::Thread* signaling_thread, 810e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org DtmfProviderInterface* provider) { 820e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (!track || !signaling_thread) { 830e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return NULL; 840e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 852a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.org rtc::scoped_refptr<DtmfSender> dtmf_sender( 862a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.org new rtc::RefCountedObject<DtmfSender>(track, signaling_thread, 870e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org provider)); 880e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return dtmf_sender; 890e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 900e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 910e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgDtmfSender::DtmfSender(AudioTrackInterface* track, 922a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.org rtc::Thread* signaling_thread, 930e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org DtmfProviderInterface* provider) 940e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org : track_(track), 950e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org observer_(NULL), 960e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org signaling_thread_(signaling_thread), 970e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org provider_(provider), 980e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org duration_(kDtmfDefaultDurationMs), 990e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org inter_tone_gap_(kDtmfDefaultGapMs) { 1000e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(track_ != NULL); 1010e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(signaling_thread_ != NULL); 1020e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (provider_) { 1030e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(provider_->GetOnDestroyedSignal() != NULL); 1040e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org provider_->GetOnDestroyedSignal()->connect( 1050e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org this, &DtmfSender::OnProviderDestroyed); 1060e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1070e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1080e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1090e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgDtmfSender::~DtmfSender() { 1100e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (provider_) { 1110e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(provider_->GetOnDestroyedSignal() != NULL); 1120e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org provider_->GetOnDestroyedSignal()->disconnect(this); 1130e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1140e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org StopSending(); 1150e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1160e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1170e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgvoid DtmfSender::RegisterObserver(DtmfSenderObserverInterface* observer) { 1180e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org observer_ = observer; 1190e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1200e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1210e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgvoid DtmfSender::UnregisterObserver() { 1220e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org observer_ = NULL; 1230e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1240e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1250e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgbool DtmfSender::CanInsertDtmf() { 1260e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(signaling_thread_->IsCurrent()); 1270e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (!provider_) { 1280e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return false; 1290e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1300e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return provider_->CanInsertDtmf(track_->id()); 1310e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1320e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1330e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgbool DtmfSender::InsertDtmf(const std::string& tones, int duration, 1340e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org int inter_tone_gap) { 1350e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(signaling_thread_->IsCurrent()); 1360e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1370e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (duration > kDtmfMaxDurationMs || 1380e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org duration < kDtmfMinDurationMs || 1390e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org inter_tone_gap < kDtmfMinGapMs) { 1400e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org LOG(LS_ERROR) << "InsertDtmf is called with invalid duration or tones gap. " 1410e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org << "The duration cannot be more than " << kDtmfMaxDurationMs 1420e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org << "ms or less than " << kDtmfMinDurationMs << "ms. " 1430e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org << "The gap between tones must be at least " << kDtmfMinGapMs << "ms."; 1440e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return false; 1450e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1460e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1470e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (!CanInsertDtmf()) { 1480e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org LOG(LS_ERROR) 1490e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org << "InsertDtmf is called on DtmfSender that can't send DTMF."; 1500e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return false; 1510e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1520e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1530e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org tones_ = tones; 1540e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org duration_ = duration; 1550e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org inter_tone_gap_ = inter_tone_gap; 1560e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Clear the previous queue. 1570e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org signaling_thread_->Clear(this, MSG_DO_INSERT_DTMF); 1580e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Kick off a new DTMF task queue. 1590e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org signaling_thread_->Post(this, MSG_DO_INSERT_DTMF); 1600e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return true; 1610e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1620e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1630e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgconst AudioTrackInterface* DtmfSender::track() const { 1640e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return track_; 1650e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1660e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1670e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgstd::string DtmfSender::tones() const { 1680e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return tones_; 1690e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1700e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1710e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgint DtmfSender::duration() const { 1720e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return duration_; 1730e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1740e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1750e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgint DtmfSender::inter_tone_gap() const { 1760e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return inter_tone_gap_; 1770e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1780e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1792a86ce22ccc387dfa6f8a98ce3eba5c1e6f9e538buildbot@webrtc.orgvoid DtmfSender::OnMessage(rtc::Message* msg) { 1800e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org switch (msg->message_id) { 1810e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org case MSG_DO_INSERT_DTMF: { 1820e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org DoInsertDtmf(); 1830e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org break; 1840e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1850e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org default: { 1860e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(false); 1870e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org break; 1880e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1890e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 1900e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 1910e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1920e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgvoid DtmfSender::DoInsertDtmf() { 1930e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(signaling_thread_->IsCurrent()); 1940e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 1950e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Get the first DTMF tone from the tone buffer. Unrecognized characters will 1960e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // be ignored and skipped. 1970e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org size_t first_tone_pos = tones_.find_first_of(kDtmfValidTones); 1980e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org int code = 0; 1990e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (first_tone_pos == std::string::npos) { 2000e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org tones_.clear(); 2010e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Fire a “OnToneChange” event with an empty string and stop. 2020e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (observer_) { 2030e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org observer_->OnToneChange(std::string()); 2040e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 2050e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return; 2060e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } else { 2070e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org char tone = tones_[first_tone_pos]; 2080e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (!GetDtmfCode(tone, &code)) { 2090e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // The find_first_of(kDtmfValidTones) should have guarantee |tone| is 2100e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // a valid DTMF tone. 2110e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org ASSERT(false); 2120e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 2130e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 2140e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 2150e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org int tone_gap = inter_tone_gap_; 2160e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (code == kDtmfCodeTwoSecondDelay) { 2170e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Special case defined by WebRTC - The character',' indicates a delay of 2 2180e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // seconds before processing the next character in the tones parameter. 2190e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org tone_gap = kDtmfTwoSecondInMs; 2200e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } else { 2210e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (!provider_) { 2220e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org LOG(LS_ERROR) << "The DtmfProvider has been destroyed."; 2230e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return; 2240e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 2250e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // The provider starts playout of the given tone on the 2260e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // associated RTP media stream, using the appropriate codec. 2270e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (!provider_->InsertDtmf(track_->id(), code, duration_)) { 2280e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org LOG(LS_ERROR) << "The DtmfProvider can no longer send DTMF."; 2290e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org return; 2300e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 2310e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Wait for the number of milliseconds specified by |duration_|. 2320e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org tone_gap += duration_; 2330e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 2340e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 2350e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Fire a “OnToneChange” event with the tone that's just processed. 2360e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org if (observer_) { 2370e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org observer_->OnToneChange(tones_.substr(first_tone_pos, 1)); 2380e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org } 2390e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 2400e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Erase the unrecognized characters plus the tone that's just processed. 2410e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org tones_.erase(0, first_tone_pos + 1); 2420e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 2430e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org // Continue with the next tone. 2440e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org signaling_thread_->PostDelayed(tone_gap, this, MSG_DO_INSERT_DTMF); 2450e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 2460e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 2470e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgvoid DtmfSender::OnProviderDestroyed() { 2480e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org LOG(LS_INFO) << "The Dtmf provider is deleted. Clear the sending queue."; 2490e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org StopSending(); 2500e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org provider_ = NULL; 2510e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 2520e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 2530e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.orgvoid DtmfSender::StopSending() { 2540e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org signaling_thread_->Clear(this); 2550e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} 2560e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org 2570e118e7129884fbea117e78d6f2068139a414dbhenrike@webrtc.org} // namespace webrtc 258