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/*
* Copyright (c) 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.
*/
#include "webrtc/voice_engine/voe_dtmf_impl.h"
#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
#include "webrtc/system_wrappers/include/trace.h"
#include "webrtc/voice_engine/channel.h"
#include "webrtc/voice_engine/include/voe_errors.h"
#include "webrtc/voice_engine/output_mixer.h"
#include "webrtc/voice_engine/transmit_mixer.h"
#include "webrtc/voice_engine/voice_engine_impl.h"
namespace webrtc {
VoEDtmf* VoEDtmf::GetInterface(VoiceEngine* voiceEngine) {
#ifndef WEBRTC_VOICE_ENGINE_DTMF_API
return NULL;
#else
if (NULL == voiceEngine) {
return NULL;
}
VoiceEngineImpl* s = static_cast<VoiceEngineImpl*>(voiceEngine);
s->AddRef();
return s;
#endif
}
#ifdef WEBRTC_VOICE_ENGINE_DTMF_API
VoEDtmfImpl::VoEDtmfImpl(voe::SharedData* shared)
: _dtmfFeedback(true), _dtmfDirectFeedback(false), _shared(shared) {
WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(_shared->instance_id(), -1),
"VoEDtmfImpl::VoEDtmfImpl() - ctor");
}
VoEDtmfImpl::~VoEDtmfImpl() {
WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(_shared->instance_id(), -1),
"VoEDtmfImpl::~VoEDtmfImpl() - dtor");
}
int VoEDtmfImpl::SendTelephoneEvent(int channel,
int eventCode,
bool outOfBand,
int lengthMs,
int attenuationDb) {
WEBRTC_TRACE(kTraceApiCall, kTraceVoice, VoEId(_shared->instance_id(), -1),
"SendTelephoneEvent(channel=%d, eventCode=%d, outOfBand=%d,"
"length=%d, attenuationDb=%d)",
channel, eventCode, (int)outOfBand, lengthMs, attenuationDb);
if (!_shared->statistics().Initialized()) {
_shared->SetLastError(VE_NOT_INITED, kTraceError);
return -1;
}
voe::ChannelOwner ch = _shared->channel_manager().GetChannel(channel);
voe::Channel* channelPtr = ch.channel();
if (channelPtr == NULL) {
_shared->SetLastError(VE_CHANNEL_NOT_VALID, kTraceError,
"SendTelephoneEvent() failed to locate channel");
return -1;
}
if (!channelPtr->Sending()) {
_shared->SetLastError(VE_NOT_SENDING, kTraceError,
"SendTelephoneEvent() sending is not active");
return -1;
}
// Sanity check
const int maxEventCode = outOfBand ? static_cast<int>(kMaxTelephoneEventCode)
: static_cast<int>(kMaxDtmfEventCode);
const bool testFailed = ((eventCode < 0) || (eventCode > maxEventCode) ||
(lengthMs < kMinTelephoneEventDuration) ||
(lengthMs > kMaxTelephoneEventDuration) ||
(attenuationDb < kMinTelephoneEventAttenuation) ||
(attenuationDb > kMaxTelephoneEventAttenuation));
if (testFailed) {
_shared->SetLastError(VE_INVALID_ARGUMENT, kTraceError,
"SendTelephoneEvent() invalid parameter(s)");
return -1;
}
const bool isDtmf = (eventCode >= 0) && (eventCode <= kMaxDtmfEventCode);
const bool playDtmfToneDirect =
isDtmf && (_dtmfFeedback && _dtmfDirectFeedback);
if (playDtmfToneDirect) {
// Mute the microphone signal while playing back the tone directly.
// This is to reduce the risk of introducing echo from the added output.
_shared->transmit_mixer()->UpdateMuteMicrophoneTime(lengthMs);
// Play out local feedback tone directly (same approach for both inband
// and outband).
// Reduce the length of the the tone with 80ms to reduce risk of echo.
// For non-direct feedback, outband and inband cases are handled
// differently.
_shared->output_mixer()->PlayDtmfTone(eventCode, lengthMs - 80,
attenuationDb);
}
if (outOfBand) {
// The RTP/RTCP module will always deliver OnPlayTelephoneEvent when
// an event is transmitted. It is up to the VoE to utilize it or not.
// This flag ensures that feedback/playout is enabled; however, the
// channel object must still parse out the Dtmf events (0-15) from
// all possible events (0-255).
const bool playDTFMEvent = (_dtmfFeedback && !_dtmfDirectFeedback);
return channelPtr->SendTelephoneEventOutband(eventCode, lengthMs,
attenuationDb, playDTFMEvent);
} else {
// For Dtmf tones, we want to ensure that inband tones are played out
// in sync with the transmitted audio. This flag is utilized by the
// channel object to determine if the queued Dtmf e vent shall also
// be fed to the output mixer in the same step as input audio is
// replaced by inband Dtmf tones.
const bool playDTFMEvent =
(isDtmf && _dtmfFeedback && !_dtmfDirectFeedback);
return channelPtr->SendTelephoneEventInband(eventCode, lengthMs,
attenuationDb, playDTFMEvent);
}
}
int VoEDtmfImpl::SetSendTelephoneEventPayloadType(int channel,
unsigned char type) {
WEBRTC_TRACE(kTraceApiCall, kTraceVoice, VoEId(_shared->instance_id(), -1),
"SetSendTelephoneEventPayloadType(channel=%d, type=%u)", channel,
type);
if (!_shared->statistics().Initialized()) {
_shared->SetLastError(VE_NOT_INITED, kTraceError);
return -1;
}
voe::ChannelOwner ch = _shared->channel_manager().GetChannel(channel);
voe::Channel* channelPtr = ch.channel();
if (channelPtr == NULL) {
_shared->SetLastError(
VE_CHANNEL_NOT_VALID, kTraceError,
"SetSendTelephoneEventPayloadType() failed to locate channel");
return -1;
}
return channelPtr->SetSendTelephoneEventPayloadType(type);
}
int VoEDtmfImpl::GetSendTelephoneEventPayloadType(int channel,
unsigned char& type) {
if (!_shared->statistics().Initialized()) {
_shared->SetLastError(VE_NOT_INITED, kTraceError);
return -1;
}
voe::ChannelOwner ch = _shared->channel_manager().GetChannel(channel);
voe::Channel* channelPtr = ch.channel();
if (channelPtr == NULL) {
_shared->SetLastError(
VE_CHANNEL_NOT_VALID, kTraceError,
"GetSendTelephoneEventPayloadType() failed to locate channel");
return -1;
}
return channelPtr->GetSendTelephoneEventPayloadType(type);
}
int VoEDtmfImpl::PlayDtmfTone(int eventCode, int lengthMs, int attenuationDb) {
WEBRTC_TRACE(kTraceApiCall, kTraceVoice, VoEId(_shared->instance_id(), -1),
"PlayDtmfTone(eventCode=%d, lengthMs=%d, attenuationDb=%d)",
eventCode, lengthMs, attenuationDb);
if (!_shared->statistics().Initialized()) {
_shared->SetLastError(VE_NOT_INITED, kTraceError);
return -1;
}
if (!_shared->audio_device()->Playing()) {
_shared->SetLastError(VE_NOT_PLAYING, kTraceError,
"PlayDtmfTone() no channel is playing out");
return -1;
}
if ((eventCode < kMinDtmfEventCode) || (eventCode > kMaxDtmfEventCode) ||
(lengthMs < kMinTelephoneEventDuration) ||
(lengthMs > kMaxTelephoneEventDuration) ||
(attenuationDb < kMinTelephoneEventAttenuation) ||
(attenuationDb > kMaxTelephoneEventAttenuation)) {
_shared->SetLastError(VE_INVALID_ARGUMENT, kTraceError,
"PlayDtmfTone() invalid tone parameter(s)");
return -1;
}
return _shared->output_mixer()->PlayDtmfTone(eventCode, lengthMs,
attenuationDb);
}
int VoEDtmfImpl::SetDtmfFeedbackStatus(bool enable, bool directFeedback) {
WEBRTC_TRACE(kTraceApiCall, kTraceVoice, VoEId(_shared->instance_id(), -1),
"SetDtmfFeedbackStatus(enable=%d, directFeeback=%d)",
(int)enable, (int)directFeedback);
CriticalSectionScoped sc(_shared->crit_sec());
_dtmfFeedback = enable;
_dtmfDirectFeedback = directFeedback;
return 0;
}
int VoEDtmfImpl::GetDtmfFeedbackStatus(bool& enabled, bool& directFeedback) {
CriticalSectionScoped sc(_shared->crit_sec());
enabled = _dtmfFeedback;
directFeedback = _dtmfDirectFeedback;
return 0;
}
#endif // #ifdef WEBRTC_VOICE_ENGINE_DTMF_API
} // namespace webrtc
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