154 lines
4.6 KiB
C++
154 lines
4.6 KiB
C++
/*
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* Copyright (C) 2013 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "RTCDTMFSender.h"
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#if ENABLE(WEB_RTC)
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#include "RTCDTMFSenderBackend.h"
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#include "RTCDTMFToneChangeEvent.h"
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#include "RTCRtpSender.h"
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#include "ScriptExecutionContext.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(RTCDTMFSender);
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static const size_t minToneDurationMs = 40;
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static const size_t maxToneDurationMs = 6000;
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static const size_t minInterToneGapMs = 30;
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RTCDTMFSender::RTCDTMFSender(ScriptExecutionContext& context, RTCRtpSender& sender, std::unique_ptr<RTCDTMFSenderBackend>&& backend)
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: ActiveDOMObject(&context)
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, m_toneTimer(*this, &RTCDTMFSender::toneTimerFired)
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, m_sender(makeWeakPtr(sender))
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, m_backend(WTFMove(backend))
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{
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m_backend->onTonePlayed([this](const String&) {
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onTonePlayed();
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});
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suspendIfNeeded();
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}
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RTCDTMFSender::~RTCDTMFSender() = default;
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bool RTCDTMFSender::canInsertDTMF() const
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{
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if (!m_sender || m_sender->isStopped())
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return false;
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auto currentDirection = m_sender->currentTransceiverDirection();
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if (!currentDirection)
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return false;
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if (*currentDirection != RTCRtpTransceiverDirection::Sendrecv && *currentDirection != RTCRtpTransceiverDirection::Sendonly)
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return false;
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return m_backend && m_backend->canInsertDTMF();
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}
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String RTCDTMFSender::toneBuffer() const
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{
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return m_tones;
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}
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static inline bool isToneCharacterInvalid(UChar character)
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{
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if (character >= '0' && character <= '9')
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return false;
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if (character >= 'A' && character <= 'D')
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return false;
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return character != '#' && character != '*' && character != ',';
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}
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ExceptionOr<void> RTCDTMFSender::insertDTMF(const String& tones, size_t duration, size_t interToneGap)
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{
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if (!canInsertDTMF())
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return Exception { InvalidStateError, "Cannot insert DTMF"_s };
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auto normalizedTones = tones.convertToUppercaseWithoutLocale();
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if (normalizedTones.find(isToneCharacterInvalid) != notFound)
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return Exception { InvalidCharacterError, "Tones are not valid"_s };
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m_tones = WTFMove(normalizedTones);
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m_duration = clampTo(duration, minToneDurationMs, maxToneDurationMs);
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m_interToneGap = std::max(interToneGap, minInterToneGapMs);
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if (m_tones.isEmpty() || m_isPendingPlayoutTask)
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return { };
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m_isPendingPlayoutTask = true;
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scriptExecutionContext()->postTask([this, protectedThis = makeRef(*this)](auto&) {
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playNextTone();
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});
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return { };
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}
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void RTCDTMFSender::playNextTone()
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{
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if (m_tones.isEmpty()) {
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m_isPendingPlayoutTask = false;
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dispatchEvent(RTCDTMFToneChangeEvent::create({ }));
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return;
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}
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if (!canInsertDTMF()) {
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m_isPendingPlayoutTask = false;
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return;
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}
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auto currentTone = m_tones.substring(0, 1);
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m_tones.remove(0);
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m_backend->playTone(currentTone, m_duration, m_interToneGap);
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dispatchEvent(RTCDTMFToneChangeEvent::create(currentTone));
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}
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void RTCDTMFSender::onTonePlayed()
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{
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m_toneTimer.startOneShot(1_ms * m_interToneGap);
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}
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void RTCDTMFSender::toneTimerFired()
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{
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playNextTone();
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}
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void RTCDTMFSender::stop()
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{
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m_backend = nullptr;
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m_toneTimer.stop();
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}
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const char* RTCDTMFSender::activeDOMObjectName() const
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{
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return "RTCDTMFSender";
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}
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} // namespace WebCore
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#endif // ENABLE(WEB_RTC)
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