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webrtc / src / a6d26ec6a2a6eccb35b3456010956bf4f53a2659 / . / webrtc / voice_engine / channel.cc
blob: 582bde5f26216f645340ef2102d87e485ff2fafb [file] [log] [blame]
/*
* 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/channel.h"
#include <algorithm>
#include <utility>
#include "webrtc/base/checks.h"
#include "webrtc/base/criticalsection.h"
#include "webrtc/base/format_macros.h"
#include "webrtc/base/logging.h"
#include "webrtc/base/rate_limiter.h"
#include "webrtc/base/thread_checker.h"
#include "webrtc/base/timeutils.h"
#include "webrtc/call/rtc_event_log.h"
#include "webrtc/config.h"
#include "webrtc/modules/audio_device/include/audio_device.h"
#include "webrtc/modules/audio_processing/include/audio_processing.h"
#include "webrtc/modules/include/module_common_types.h"
#include "webrtc/modules/pacing/packet_router.h"
#include "webrtc/modules/rtp_rtcp/include/receive_statistics.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_payload_registry.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_receiver.h"
#include "webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h"
#include "webrtc/modules/utility/include/audio_frame_operations.h"
#include "webrtc/modules/utility/include/process_thread.h"
#include "webrtc/system_wrappers/include/trace.h"
#include "webrtc/voice_engine/include/voe_external_media.h"
#include "webrtc/voice_engine/include/voe_rtp_rtcp.h"
#include "webrtc/voice_engine/output_mixer.h"
#include "webrtc/voice_engine/statistics.h"
#include "webrtc/voice_engine/transmit_mixer.h"
#include "webrtc/voice_engine/utility.h"
namespace webrtc {
namespace voe {
namespace {
constexpr int64_t kMaxRetransmissionWindowMs = 1000;
constexpr int64_t kMinRetransmissionWindowMs = 30;
bool RegisterReceiveCodec(std::unique_ptr<AudioCodingModule>* acm,
acm2::RentACodec* rac,
const CodecInst& ci) {
const int result = (*acm)->RegisterReceiveCodec(
ci, [&] { return rac->RentIsacDecoder(ci.plfreq); });
return result == 0;
}
} // namespace
const int kTelephoneEventAttenuationdB = 10;
class RtcEventLogProxy final : public webrtc::RtcEventLog {
public:
RtcEventLogProxy() : event_log_(nullptr) {}
bool StartLogging(const std::string& file_name,
int64_t max_size_bytes) override {
RTC_NOTREACHED();
return false;
}
bool StartLogging(rtc::PlatformFile log_file,
int64_t max_size_bytes) override {
RTC_NOTREACHED();
return false;
}
void StopLogging() override { RTC_NOTREACHED(); }
void LogVideoReceiveStreamConfig(
const webrtc::VideoReceiveStream::Config& config) override {
rtc::CritScope lock(&crit_);
if (event_log_) {
event_log_->LogVideoReceiveStreamConfig(config);
}
}
void LogVideoSendStreamConfig(
const webrtc::VideoSendStream::Config& config) override {
rtc::CritScope lock(&crit_);
if (event_log_) {
event_log_->LogVideoSendStreamConfig(config);
}
}
void LogRtpHeader(webrtc::PacketDirection direction,
webrtc::MediaType media_type,
const uint8_t* header,
size_t packet_length) override {
rtc::CritScope lock(&crit_);
if (event_log_) {
event_log_->LogRtpHeader(direction, media_type, header, packet_length);
}
}
void LogRtcpPacket(webrtc::PacketDirection direction,
webrtc::MediaType media_type,
const uint8_t* packet,
size_t length) override {
rtc::CritScope lock(&crit_);
if (event_log_) {
event_log_->LogRtcpPacket(direction, media_type, packet, length);
}
}
void LogAudioPlayout(uint32_t ssrc) override {
rtc::CritScope lock(&crit_);
if (event_log_) {
event_log_->LogAudioPlayout(ssrc);
}
}
void LogBwePacketLossEvent(int32_t bitrate,
uint8_t fraction_loss,
int32_t total_packets) override {
rtc::CritScope lock(&crit_);
if (event_log_) {
event_log_->LogBwePacketLossEvent(bitrate, fraction_loss, total_packets);
}
}
void SetEventLog(RtcEventLog* event_log) {
rtc::CritScope lock(&crit_);
event_log_ = event_log;
}
private:
rtc::CriticalSection crit_;
RtcEventLog* event_log_ GUARDED_BY(crit_);
RTC_DISALLOW_COPY_AND_ASSIGN(RtcEventLogProxy);
};
class TransportFeedbackProxy : public TransportFeedbackObserver {
public:
TransportFeedbackProxy() : feedback_observer_(nullptr) {
pacer_thread_.DetachFromThread();
network_thread_.DetachFromThread();
}
void SetTransportFeedbackObserver(
TransportFeedbackObserver* feedback_observer) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
rtc::CritScope lock(&crit_);
feedback_observer_ = feedback_observer;
}
// Implements TransportFeedbackObserver.
void AddPacket(uint16_t sequence_number,
size_t length,
int probe_cluster_id) override {
RTC_DCHECK(pacer_thread_.CalledOnValidThread());
rtc::CritScope lock(&crit_);
if (feedback_observer_)
feedback_observer_->AddPacket(sequence_number, length, probe_cluster_id);
}
void OnTransportFeedback(const rtcp::TransportFeedback& feedback) override {
RTC_DCHECK(network_thread_.CalledOnValidThread());
rtc::CritScope lock(&crit_);
feedback_observer_->OnTransportFeedback(feedback);
}
std::vector<PacketInfo> GetTransportFeedbackVector() const override {
RTC_NOTREACHED();
return std::vector<PacketInfo>();
}
private:
rtc::CriticalSection crit_;
rtc::ThreadChecker thread_checker_;
rtc::ThreadChecker pacer_thread_;
rtc::ThreadChecker network_thread_;
TransportFeedbackObserver* feedback_observer_ GUARDED_BY(&crit_);
};
class TransportSequenceNumberProxy : public TransportSequenceNumberAllocator {
public:
TransportSequenceNumberProxy() : seq_num_allocator_(nullptr) {
pacer_thread_.DetachFromThread();
}
void SetSequenceNumberAllocator(
TransportSequenceNumberAllocator* seq_num_allocator) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
rtc::CritScope lock(&crit_);
seq_num_allocator_ = seq_num_allocator;
}
// Implements TransportSequenceNumberAllocator.
uint16_t AllocateSequenceNumber() override {
RTC_DCHECK(pacer_thread_.CalledOnValidThread());
rtc::CritScope lock(&crit_);
if (!seq_num_allocator_)
return 0;
return seq_num_allocator_->AllocateSequenceNumber();
}
private:
rtc::CriticalSection crit_;
rtc::ThreadChecker thread_checker_;
rtc::ThreadChecker pacer_thread_;
TransportSequenceNumberAllocator* seq_num_allocator_ GUARDED_BY(&crit_);
};
class RtpPacketSenderProxy : public RtpPacketSender {
public:
RtpPacketSenderProxy() : rtp_packet_sender_(nullptr) {}
void SetPacketSender(RtpPacketSender* rtp_packet_sender) {
RTC_DCHECK(thread_checker_.CalledOnValidThread());
rtc::CritScope lock(&crit_);
rtp_packet_sender_ = rtp_packet_sender;
}
// Implements RtpPacketSender.
void InsertPacket(Priority priority,
uint32_t ssrc,
uint16_t sequence_number,
int64_t capture_time_ms,
size_t bytes,
bool retransmission) override {
rtc::CritScope lock(&crit_);
if (rtp_packet_sender_) {
rtp_packet_sender_->InsertPacket(priority, ssrc, sequence_number,
capture_time_ms, bytes, retransmission);
}
}
private:
rtc::ThreadChecker thread_checker_;
rtc::CriticalSection crit_;
RtpPacketSender* rtp_packet_sender_ GUARDED_BY(&crit_);
};
// Extend the default RTCP statistics struct with max_jitter, defined as the
// maximum jitter value seen in an RTCP report block.
struct ChannelStatistics : public RtcpStatistics {
ChannelStatistics() : rtcp(), max_jitter(0) {}
RtcpStatistics rtcp;
uint32_t max_jitter;
};
// Statistics callback, called at each generation of a new RTCP report block.
class StatisticsProxy : public RtcpStatisticsCallback {
public:
StatisticsProxy(uint32_t ssrc) : ssrc_(ssrc) {}
virtual ~StatisticsProxy() {}
void StatisticsUpdated(const RtcpStatistics& statistics,
uint32_t ssrc) override {
if (ssrc != ssrc_)
return;
rtc::CritScope cs(&stats_lock_);
stats_.rtcp = statistics;
if (statistics.jitter > stats_.max_jitter) {
stats_.max_jitter = statistics.jitter;
}
}
void CNameChanged(const char* cname, uint32_t ssrc) override {}
ChannelStatistics GetStats() {
rtc::CritScope cs(&stats_lock_);
return stats_;
}
private:
// StatisticsUpdated calls are triggered from threads in the RTP module,
// while GetStats calls can be triggered from the public voice engine API,
// hence synchronization is needed.
rtc::CriticalSection stats_lock_;
const uint32_t ssrc_;
ChannelStatistics stats_;
};
class VoERtcpObserver : public RtcpBandwidthObserver {
public:
explicit VoERtcpObserver(Channel* owner) : owner_(owner) {}
virtual ~VoERtcpObserver() {}
void OnReceivedEstimatedBitrate(uint32_t bitrate) override {
// Not used for Voice Engine.
}
void OnReceivedRtcpReceiverReport(const ReportBlockList& report_blocks,
int64_t rtt,
int64_t now_ms) override {
// TODO(mflodman): Do we need to aggregate reports here or can we jut send
// what we get? I.e. do we ever get multiple reports bundled into one RTCP
// report for VoiceEngine?
if (report_blocks.empty())
return;
int fraction_lost_aggregate = 0;
int total_number_of_packets = 0;
// If receiving multiple report blocks, calculate the weighted average based
// on the number of packets a report refers to.
for (ReportBlockList::const_iterator block_it = report_blocks.begin();
block_it != report_blocks.end(); ++block_it) {
// Find the previous extended high sequence number for this remote SSRC,
// to calculate the number of RTP packets this report refers to. Ignore if
// we haven't seen this SSRC before.
std::map<uint32_t, uint32_t>::iterator seq_num_it =
extended_max_sequence_number_.find(block_it->sourceSSRC);
int number_of_packets = 0;
if (seq_num_it != extended_max_sequence_number_.end()) {
number_of_packets = block_it->extendedHighSeqNum - seq_num_it->second;
}
fraction_lost_aggregate += number_of_packets * block_it->fractionLost;
total_number_of_packets += number_of_packets;
extended_max_sequence_number_[block_it->sourceSSRC] =
block_it->extendedHighSeqNum;
}
int weighted_fraction_lost = 0;
if (total_number_of_packets > 0) {
weighted_fraction_lost =
(fraction_lost_aggregate + total_number_of_packets / 2) /
total_number_of_packets;
}
owner_->OnIncomingFractionLoss(weighted_fraction_lost);
}
private:
Channel* owner_;
// Maps remote side ssrc to extended highest sequence number received.
std::map<uint32_t, uint32_t> extended_max_sequence_number_;
};
int32_t Channel::SendData(FrameType frameType,
uint8_t payloadType,
uint32_t timeStamp,
const uint8_t* payloadData,
size_t payloadSize,
const RTPFragmentationHeader* fragmentation) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendData(frameType=%u, payloadType=%u, timeStamp=%u,"
" payloadSize=%" PRIuS ", fragmentation=0x%x)",
frameType, payloadType, timeStamp, payloadSize, fragmentation);
if (_includeAudioLevelIndication) {
// Store current audio level in the RTP/RTCP module.
// The level will be used in combination with voice-activity state
// (frameType) to add an RTP header extension
_rtpRtcpModule->SetAudioLevel(rms_level_.RMS());
}
// Push data from ACM to RTP/RTCP-module to deliver audio frame for
// packetization.
// This call will trigger Transport::SendPacket() from the RTP/RTCP module.
if (!_rtpRtcpModule->SendOutgoingData(
(FrameType&)frameType, payloadType, timeStamp,
// Leaving the time when this frame was
// received from the capture device as
// undefined for voice for now.
-1, payloadData, payloadSize, fragmentation, nullptr, nullptr)) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceWarning,
"Channel::SendData() failed to send data to RTP/RTCP module");
return -1;
}
_lastLocalTimeStamp = timeStamp;
_lastPayloadType = payloadType;
return 0;
}
int32_t Channel::InFrameType(FrameType frame_type) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::InFrameType(frame_type=%d)", frame_type);
rtc::CritScope cs(&_callbackCritSect);
_sendFrameType = (frame_type == kAudioFrameSpeech);
return 0;
}
bool Channel::SendRtp(const uint8_t* data,
size_t len,
const PacketOptions& options) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendPacket(channel=%d, len=%" PRIuS ")", len);
rtc::CritScope cs(&_callbackCritSect);
if (_transportPtr == NULL) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendPacket() failed to send RTP packet due to"
" invalid transport object");
return false;
}
uint8_t* bufferToSendPtr = (uint8_t*)data;
size_t bufferLength = len;
if (!_transportPtr->SendRtp(bufferToSendPtr, bufferLength, options)) {
std::string transport_name =
_externalTransport ? "external transport" : "WebRtc sockets";
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendPacket() RTP transmission using %s failed",
transport_name.c_str());
return false;
}
return true;
}
bool Channel::SendRtcp(const uint8_t* data, size_t len) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendRtcp(len=%" PRIuS ")", len);
rtc::CritScope cs(&_callbackCritSect);
if (_transportPtr == NULL) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendRtcp() failed to send RTCP packet"
" due to invalid transport object");
return false;
}
uint8_t* bufferToSendPtr = (uint8_t*)data;
size_t bufferLength = len;
int n = _transportPtr->SendRtcp(bufferToSendPtr, bufferLength);
if (n < 0) {
std::string transport_name =
_externalTransport ? "external transport" : "WebRtc sockets";
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendRtcp() transmission using %s failed",
transport_name.c_str());
return false;
}
return true;
}
void Channel::OnIncomingSSRCChanged(uint32_t ssrc) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::OnIncomingSSRCChanged(SSRC=%d)", ssrc);
// Update ssrc so that NTP for AV sync can be updated.
_rtpRtcpModule->SetRemoteSSRC(ssrc);
}
void Channel::OnIncomingCSRCChanged(uint32_t CSRC, bool added) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::OnIncomingCSRCChanged(CSRC=%d, added=%d)", CSRC,
added);
}
int32_t Channel::OnInitializeDecoder(
int8_t payloadType,
const char payloadName[RTP_PAYLOAD_NAME_SIZE],
int frequency,
size_t channels,
uint32_t rate) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::OnInitializeDecoder(payloadType=%d, "
"payloadName=%s, frequency=%u, channels=%" PRIuS ", rate=%u)",
payloadType, payloadName, frequency, channels, rate);
CodecInst receiveCodec = {0};
CodecInst dummyCodec = {0};
receiveCodec.pltype = payloadType;
receiveCodec.plfreq = frequency;
receiveCodec.channels = channels;
receiveCodec.rate = rate;
strncpy(receiveCodec.plname, payloadName, RTP_PAYLOAD_NAME_SIZE - 1);
audio_coding_->Codec(payloadName, &dummyCodec, frequency, channels);
receiveCodec.pacsize = dummyCodec.pacsize;
// Register the new codec to the ACM
if (!RegisterReceiveCodec(&audio_coding_, &rent_a_codec_, receiveCodec)) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::OnInitializeDecoder() invalid codec ("
"pt=%d, name=%s) received - 1",
payloadType, payloadName);
_engineStatisticsPtr->SetLastError(VE_AUDIO_CODING_MODULE_ERROR);
return -1;
}
return 0;
}
int32_t Channel::OnReceivedPayloadData(const uint8_t* payloadData,
size_t payloadSize,
const WebRtcRTPHeader* rtpHeader) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::OnReceivedPayloadData(payloadSize=%" PRIuS
","
" payloadType=%u, audioChannel=%" PRIuS ")",
payloadSize, rtpHeader->header.payloadType,
rtpHeader->type.Audio.channel);
if (!channel_state_.Get().playing) {
// Avoid inserting into NetEQ when we are not playing. Count the
// packet as discarded.
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"received packet is discarded since playing is not"
" activated");
_numberOfDiscardedPackets++;
return 0;
}
// Push the incoming payload (parsed and ready for decoding) into the ACM
if (audio_coding_->IncomingPacket(payloadData, payloadSize, *rtpHeader) !=
0) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceWarning,
"Channel::OnReceivedPayloadData() unable to push data to the ACM");
return -1;
}
int64_t round_trip_time = 0;
_rtpRtcpModule->RTT(rtp_receiver_->SSRC(), &round_trip_time, NULL, NULL,
NULL);
std::vector<uint16_t> nack_list = audio_coding_->GetNackList(round_trip_time);
if (!nack_list.empty()) {
// Can't use nack_list.data() since it's not supported by all
// compilers.
ResendPackets(&(nack_list[0]), static_cast<int>(nack_list.size()));
}
return 0;
}
bool Channel::OnRecoveredPacket(const uint8_t* rtp_packet,
size_t rtp_packet_length) {
RTPHeader header;
if (!rtp_header_parser_->Parse(rtp_packet, rtp_packet_length, &header)) {
WEBRTC_TRACE(kTraceDebug, webrtc::kTraceVoice, _channelId,
"IncomingPacket invalid RTP header");
return false;
}
header.payload_type_frequency =
rtp_payload_registry_->GetPayloadTypeFrequency(header.payloadType);
if (header.payload_type_frequency < 0)
return false;
return ReceivePacket(rtp_packet, rtp_packet_length, header, false);
}
MixerParticipant::AudioFrameInfo Channel::GetAudioFrameWithMuted(
int32_t id,
AudioFrame* audioFrame) {
unsigned int ssrc;
RTC_CHECK_EQ(GetLocalSSRC(ssrc), 0);
event_log_proxy_->LogAudioPlayout(ssrc);
// Get 10ms raw PCM data from the ACM (mixer limits output frequency)
bool muted;
if (audio_coding_->PlayoutData10Ms(audioFrame->sample_rate_hz_, audioFrame,
&muted) == -1) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::GetAudioFrame() PlayoutData10Ms() failed!");
// In all likelihood, the audio in this frame is garbage. We return an
// error so that the audio mixer module doesn't add it to the mix. As
// a result, it won't be played out and the actions skipped here are
// irrelevant.
return MixerParticipant::AudioFrameInfo::kError;
}
if (muted) {
// TODO(henrik.lundin): We should be able to do better than this. But we
// will have to go through all the cases below where the audio samples may
// be used, and handle the muted case in some way.
audioFrame->Mute();
}
// Convert module ID to internal VoE channel ID
audioFrame->id_ = VoEChannelId(audioFrame->id_);
// Store speech type for dead-or-alive detection
_outputSpeechType = audioFrame->speech_type_;
ChannelState::State state = channel_state_.Get();
{
// Pass the audio buffers to an optional sink callback, before applying
// scaling/panning, as that applies to the mix operation.
// External recipients of the audio (e.g. via AudioTrack), will do their
// own mixing/dynamic processing.
rtc::CritScope cs(&_callbackCritSect);
if (audio_sink_) {
AudioSinkInterface::Data data(
&audioFrame->data_[0], audioFrame->samples_per_channel_,
audioFrame->sample_rate_hz_, audioFrame->num_channels_,
audioFrame->timestamp_);
audio_sink_->OnData(data);
}
}
float output_gain = 1.0f;
float left_pan = 1.0f;
float right_pan = 1.0f;
{
rtc::CritScope cs(&volume_settings_critsect_);
output_gain = _outputGain;
left_pan = _panLeft;
right_pan = _panRight;
}
// Output volume scaling
if (output_gain < 0.99f || output_gain > 1.01f) {
AudioFrameOperations::ScaleWithSat(output_gain, *audioFrame);
}
// Scale left and/or right channel(s) if stereo and master balance is
// active
if (left_pan != 1.0f || right_pan != 1.0f) {
if (audioFrame->num_channels_ == 1) {
// Emulate stereo mode since panning is active.
// The mono signal is copied to both left and right channels here.
AudioFrameOperations::MonoToStereo(audioFrame);
}
// For true stereo mode (when we are receiving a stereo signal), no
// action is needed.
// Do the panning operation (the audio frame contains stereo at this
// stage)
AudioFrameOperations::Scale(left_pan, right_pan, *audioFrame);
}
// Mix decoded PCM output with file if file mixing is enabled
if (state.output_file_playing) {
MixAudioWithFile(*audioFrame, audioFrame->sample_rate_hz_);
muted = false; // We may have added non-zero samples.
}
// External media
if (_outputExternalMedia) {
rtc::CritScope cs(&_callbackCritSect);
const bool isStereo = (audioFrame->num_channels_ == 2);
if (_outputExternalMediaCallbackPtr) {
_outputExternalMediaCallbackPtr->Process(
_channelId, kPlaybackPerChannel, (int16_t*)audioFrame->data_,
audioFrame->samples_per_channel_, audioFrame->sample_rate_hz_,
isStereo);
}
}
// Record playout if enabled
{
rtc::CritScope cs(&_fileCritSect);
if (_outputFileRecording && output_file_recorder_) {
output_file_recorder_->RecordAudioToFile(*audioFrame);
}
}
// Measure audio level (0-9)
// TODO(henrik.lundin) Use the |muted| information here too.
_outputAudioLevel.ComputeLevel(*audioFrame);
if (capture_start_rtp_time_stamp_ < 0 && audioFrame->timestamp_ != 0) {
// The first frame with a valid rtp timestamp.
capture_start_rtp_time_stamp_ = audioFrame->timestamp_;
}
if (capture_start_rtp_time_stamp_ >= 0) {
// audioFrame.timestamp_ should be valid from now on.
// Compute elapsed time.
int64_t unwrap_timestamp =
rtp_ts_wraparound_handler_->Unwrap(audioFrame->timestamp_);
audioFrame->elapsed_time_ms_ =
(unwrap_timestamp - capture_start_rtp_time_stamp_) /
(GetPlayoutFrequency() / 1000);
{
rtc::CritScope lock(&ts_stats_lock_);
// Compute ntp time.
audioFrame->ntp_time_ms_ =
ntp_estimator_.Estimate(audioFrame->timestamp_);
// |ntp_time_ms_| won't be valid until at least 2 RTCP SRs are received.
if (audioFrame->ntp_time_ms_ > 0) {
// Compute |capture_start_ntp_time_ms_| so that
// |capture_start_ntp_time_ms_| + |elapsed_time_ms_| == |ntp_time_ms_|
capture_start_ntp_time_ms_ =
audioFrame->ntp_time_ms_ - audioFrame->elapsed_time_ms_;
}
}
}
return muted ? MixerParticipant::AudioFrameInfo::kMuted
: MixerParticipant::AudioFrameInfo::kNormal;
}
int32_t Channel::NeededFrequency(int32_t id) const {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::NeededFrequency(id=%d)", id);
int highestNeeded = 0;
// Determine highest needed receive frequency
int32_t receiveFrequency = audio_coding_->ReceiveFrequency();
// Return the bigger of playout and receive frequency in the ACM.
if (audio_coding_->PlayoutFrequency() > receiveFrequency) {
highestNeeded = audio_coding_->PlayoutFrequency();
} else {
highestNeeded = receiveFrequency;
}
// Special case, if we're playing a file on the playout side
// we take that frequency into consideration as well
// This is not needed on sending side, since the codec will
// limit the spectrum anyway.
if (channel_state_.Get().output_file_playing) {
rtc::CritScope cs(&_fileCritSect);
if (output_file_player_) {
if (output_file_player_->Frequency() > highestNeeded) {
highestNeeded = output_file_player_->Frequency();
}
}
}
return (highestNeeded);
}
int32_t Channel::CreateChannel(
Channel*& channel,
int32_t channelId,
uint32_t instanceId,
const VoEBase::ChannelConfig& config) {
WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(instanceId, channelId),
"Channel::CreateChannel(channelId=%d, instanceId=%d)", channelId,
instanceId);
channel = new Channel(channelId, instanceId, config);
if (channel == NULL) {
WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(instanceId, channelId),
"Channel::CreateChannel() unable to allocate memory for"
" channel");
return -1;
}
return 0;
}
void Channel::PlayNotification(int32_t id, uint32_t durationMs) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::PlayNotification(id=%d, durationMs=%d)", id,
durationMs);
// Not implement yet
}
void Channel::RecordNotification(int32_t id, uint32_t durationMs) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RecordNotification(id=%d, durationMs=%d)", id,
durationMs);
// Not implement yet
}
void Channel::PlayFileEnded(int32_t id) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::PlayFileEnded(id=%d)", id);
if (id == _inputFilePlayerId) {
channel_state_.SetInputFilePlaying(false);
WEBRTC_TRACE(kTraceStateInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::PlayFileEnded() => input file player module is"
" shutdown");
} else if (id == _outputFilePlayerId) {
channel_state_.SetOutputFilePlaying(false);
WEBRTC_TRACE(kTraceStateInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::PlayFileEnded() => output file player module is"
" shutdown");
}
}
void Channel::RecordFileEnded(int32_t id) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RecordFileEnded(id=%d)", id);
assert(id == _outputFileRecorderId);
rtc::CritScope cs(&_fileCritSect);
_outputFileRecording = false;
WEBRTC_TRACE(kTraceStateInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RecordFileEnded() => output file recorder module is"
" shutdown");
}
Channel::Channel(int32_t channelId,
uint32_t instanceId,
const VoEBase::ChannelConfig& config)
: _instanceId(instanceId),
_channelId(channelId),
event_log_proxy_(new RtcEventLogProxy()),
rtp_header_parser_(RtpHeaderParser::Create()),
rtp_payload_registry_(
new RTPPayloadRegistry(RTPPayloadStrategy::CreateStrategy(true))),
rtp_receive_statistics_(
ReceiveStatistics::Create(Clock::GetRealTimeClock())),
rtp_receiver_(
RtpReceiver::CreateAudioReceiver(Clock::GetRealTimeClock(),
this,
this,
rtp_payload_registry_.get())),
telephone_event_handler_(rtp_receiver_->GetTelephoneEventHandler()),
_outputAudioLevel(),
_externalTransport(false),
// Avoid conflict with other channels by adding 1024 - 1026,
// won't use as much as 1024 channels.
_inputFilePlayerId(VoEModuleId(instanceId, channelId) + 1024),
_outputFilePlayerId(VoEModuleId(instanceId, channelId) + 1025),
_outputFileRecorderId(VoEModuleId(instanceId, channelId) + 1026),
_outputFileRecording(false),
_outputExternalMedia(false),
_inputExternalMediaCallbackPtr(NULL),
_outputExternalMediaCallbackPtr(NULL),
_timeStamp(0), // This is just an offset, RTP module will add it's own
// random offset
ntp_estimator_(Clock::GetRealTimeClock()),
playout_timestamp_rtp_(0),
playout_timestamp_rtcp_(0),
playout_delay_ms_(0),
_numberOfDiscardedPackets(0),
send_sequence_number_(0),
rtp_ts_wraparound_handler_(new rtc::TimestampWrapAroundHandler()),
capture_start_rtp_time_stamp_(-1),
capture_start_ntp_time_ms_(-1),
_engineStatisticsPtr(NULL),
_outputMixerPtr(NULL),
_transmitMixerPtr(NULL),
_moduleProcessThreadPtr(NULL),
_audioDeviceModulePtr(NULL),
_voiceEngineObserverPtr(NULL),
_callbackCritSectPtr(NULL),
_transportPtr(NULL),
_sendFrameType(0),
_externalMixing(false),
_mixFileWithMicrophone(false),
input_mute_(false),
previous_frame_muted_(false),
_panLeft(1.0f),
_panRight(1.0f),
_outputGain(1.0f),
_lastLocalTimeStamp(0),
_lastPayloadType(0),
_includeAudioLevelIndication(false),
_outputSpeechType(AudioFrame::kNormalSpeech),
restored_packet_in_use_(false),
rtcp_observer_(new VoERtcpObserver(this)),
network_predictor_(new NetworkPredictor(Clock::GetRealTimeClock())),
associate_send_channel_(ChannelOwner(nullptr)),
pacing_enabled_(config.enable_voice_pacing),
feedback_observer_proxy_(new TransportFeedbackProxy()),
seq_num_allocator_proxy_(new TransportSequenceNumberProxy()),
rtp_packet_sender_proxy_(new RtpPacketSenderProxy()),
retransmission_rate_limiter_(new RateLimiter(Clock::GetRealTimeClock(),
kMaxRetransmissionWindowMs)),
decoder_factory_(config.acm_config.decoder_factory) {
WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Channel() - ctor");
AudioCodingModule::Config acm_config(config.acm_config);
acm_config.id = VoEModuleId(instanceId, channelId);
acm_config.neteq_config.enable_muted_state = true;
audio_coding_.reset(AudioCodingModule::Create(acm_config));
_outputAudioLevel.Clear();
RtpRtcp::Configuration configuration;
configuration.audio = true;
configuration.outgoing_transport = this;
configuration.receive_statistics = rtp_receive_statistics_.get();
configuration.bandwidth_callback = rtcp_observer_.get();
if (pacing_enabled_) {
configuration.paced_sender = rtp_packet_sender_proxy_.get();
configuration.transport_sequence_number_allocator =
seq_num_allocator_proxy_.get();
configuration.transport_feedback_callback = feedback_observer_proxy_.get();
}
configuration.event_log = &(*event_log_proxy_);
configuration.retransmission_rate_limiter =
retransmission_rate_limiter_.get();
_rtpRtcpModule.reset(RtpRtcp::CreateRtpRtcp(configuration));
_rtpRtcpModule->SetSendingMediaStatus(false);
statistics_proxy_.reset(new StatisticsProxy(_rtpRtcpModule->SSRC()));
rtp_receive_statistics_->RegisterRtcpStatisticsCallback(
statistics_proxy_.get());
}
Channel::~Channel() {
rtp_receive_statistics_->RegisterRtcpStatisticsCallback(NULL);
WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::~Channel() - dtor");
if (_outputExternalMedia) {
DeRegisterExternalMediaProcessing(kPlaybackPerChannel);
}
if (channel_state_.Get().input_external_media) {
DeRegisterExternalMediaProcessing(kRecordingPerChannel);
}
StopSend();
StopPlayout();
{
rtc::CritScope cs(&_fileCritSect);
if (input_file_player_) {
input_file_player_->RegisterModuleFileCallback(NULL);
input_file_player_->StopPlayingFile();
}
if (output_file_player_) {
output_file_player_->RegisterModuleFileCallback(NULL);
output_file_player_->StopPlayingFile();
}
if (output_file_recorder_) {
output_file_recorder_->RegisterModuleFileCallback(NULL);
output_file_recorder_->StopRecording();
}
}
// The order to safely shutdown modules in a channel is:
// 1. De-register callbacks in modules
// 2. De-register modules in process thread
// 3. Destroy modules
if (audio_coding_->RegisterTransportCallback(NULL) == -1) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"~Channel() failed to de-register transport callback"
" (Audio coding module)");
}
if (audio_coding_->RegisterVADCallback(NULL) == -1) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"~Channel() failed to de-register VAD callback"
" (Audio coding module)");
}
// De-register modules in process thread
_moduleProcessThreadPtr->DeRegisterModule(_rtpRtcpModule.get());
// End of modules shutdown
}
int32_t Channel::Init() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Init()");
channel_state_.Reset();
// --- Initial sanity
if ((_engineStatisticsPtr == NULL) || (_moduleProcessThreadPtr == NULL)) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Init() must call SetEngineInformation() first");
return -1;
}
// --- Add modules to process thread (for periodic schedulation)
_moduleProcessThreadPtr->RegisterModule(_rtpRtcpModule.get());
// --- ACM initialization
if (audio_coding_->InitializeReceiver() == -1) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"Channel::Init() unable to initialize the ACM - 1");
return -1;
}
// --- RTP/RTCP module initialization
// Ensure that RTCP is enabled by default for the created channel.
// Note that, the module will keep generating RTCP until it is explicitly
// disabled by the user.
// After StopListen (when no sockets exists), RTCP packets will no longer
// be transmitted since the Transport object will then be invalid.
telephone_event_handler_->SetTelephoneEventForwardToDecoder(true);
// RTCP is enabled by default.
_rtpRtcpModule->SetRTCPStatus(RtcpMode::kCompound);
// --- Register all permanent callbacks
const bool fail = (audio_coding_->RegisterTransportCallback(this) == -1) ||
(audio_coding_->RegisterVADCallback(this) == -1);
if (fail) {
_engineStatisticsPtr->SetLastError(
VE_CANNOT_INIT_CHANNEL, kTraceError,
"Channel::Init() callbacks not registered");
return -1;
}
// --- Register all supported codecs to the receiving side of the
// RTP/RTCP module
CodecInst codec;
const uint8_t nSupportedCodecs = AudioCodingModule::NumberOfCodecs();
for (int idx = 0; idx < nSupportedCodecs; idx++) {
// Open up the RTP/RTCP receiver for all supported codecs
if ((audio_coding_->Codec(idx, &codec) == -1) ||
(rtp_receiver_->RegisterReceivePayload(
codec.plname, codec.pltype, codec.plfreq, codec.channels,
(codec.rate < 0) ? 0 : codec.rate) == -1)) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Init() unable to register %s "
"(%d/%d/%" PRIuS "/%d) to RTP/RTCP receiver",
codec.plname, codec.pltype, codec.plfreq, codec.channels,
codec.rate);
} else {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Init() %s (%d/%d/%" PRIuS
"/%d) has been "
"added to the RTP/RTCP receiver",
codec.plname, codec.pltype, codec.plfreq, codec.channels,
codec.rate);
}
// Ensure that PCMU is used as default codec on the sending side
if (!STR_CASE_CMP(codec.plname, "PCMU") && (codec.channels == 1)) {
SetSendCodec(codec);
}
// Register default PT for outband 'telephone-event'
if (!STR_CASE_CMP(codec.plname, "telephone-event")) {
if (_rtpRtcpModule->RegisterSendPayload(codec) == -1 ||
!RegisterReceiveCodec(&audio_coding_, &rent_a_codec_, codec)) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Init() failed to register outband "
"'telephone-event' (%d/%d) correctly",
codec.pltype, codec.plfreq);
}
}
if (!STR_CASE_CMP(codec.plname, "CN")) {
if (!codec_manager_.RegisterEncoder(codec) ||
!codec_manager_.MakeEncoder(&rent_a_codec_, audio_coding_.get()) ||
!RegisterReceiveCodec(&audio_coding_, &rent_a_codec_, codec) ||
_rtpRtcpModule->RegisterSendPayload(codec) == -1) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Init() failed to register CN (%d/%d) "
"correctly - 1",
codec.pltype, codec.plfreq);
}
}
}
return 0;
}
int32_t Channel::SetEngineInformation(Statistics& engineStatistics,
OutputMixer& outputMixer,
voe::TransmitMixer& transmitMixer,
ProcessThread& moduleProcessThread,
AudioDeviceModule& audioDeviceModule,
VoiceEngineObserver* voiceEngineObserver,
rtc::CriticalSection* callbackCritSect) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetEngineInformation()");
_engineStatisticsPtr = &engineStatistics;
_outputMixerPtr = &outputMixer;
_transmitMixerPtr = &transmitMixer,
_moduleProcessThreadPtr = &moduleProcessThread;
_audioDeviceModulePtr = &audioDeviceModule;
_voiceEngineObserverPtr = voiceEngineObserver;
_callbackCritSectPtr = callbackCritSect;
return 0;
}
int32_t Channel::UpdateLocalTimeStamp() {
_timeStamp += static_cast<uint32_t>(_audioFrame.samples_per_channel_);
return 0;
}
void Channel::SetSink(std::unique_ptr<AudioSinkInterface> sink) {
rtc::CritScope cs(&_callbackCritSect);
audio_sink_ = std::move(sink);
}
const rtc::scoped_refptr<AudioDecoderFactory>&
Channel::GetAudioDecoderFactory() const {
return decoder_factory_;
}
int32_t Channel::StartPlayout() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartPlayout()");
if (channel_state_.Get().playing) {
return 0;
}
if (!_externalMixing) {
// Add participant as candidates for mixing.
if (_outputMixerPtr->SetMixabilityStatus(*this, true) != 0) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CONF_MIX_MODULE_ERROR, kTraceError,
"StartPlayout() failed to add participant to mixer");
return -1;
}
}
channel_state_.SetPlaying(true);
if (RegisterFilePlayingToMixer() != 0)
return -1;
return 0;
}
int32_t Channel::StopPlayout() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StopPlayout()");
if (!channel_state_.Get().playing) {
return 0;
}
if (!_externalMixing) {
// Remove participant as candidates for mixing
if (_outputMixerPtr->SetMixabilityStatus(*this, false) != 0) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CONF_MIX_MODULE_ERROR, kTraceError,
"StopPlayout() failed to remove participant from mixer");
return -1;
}
}
channel_state_.SetPlaying(false);
_outputAudioLevel.Clear();
return 0;
}
int32_t Channel::StartSend() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartSend()");
// Resume the previous sequence number which was reset by StopSend().
// This needs to be done before |sending| is set to true.
if (send_sequence_number_)
SetInitSequenceNumber(send_sequence_number_);
if (channel_state_.Get().sending) {
return 0;
}
channel_state_.SetSending(true);
_rtpRtcpModule->SetSendingMediaStatus(true);
if (_rtpRtcpModule->SetSendingStatus(true) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceError,
"StartSend() RTP/RTCP failed to start sending");
_rtpRtcpModule->SetSendingMediaStatus(false);
rtc::CritScope cs(&_callbackCritSect);
channel_state_.SetSending(false);
return -1;
}
return 0;
}
int32_t Channel::StopSend() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StopSend()");
if (!channel_state_.Get().sending) {
return 0;
}
channel_state_.SetSending(false);
// Store the sequence number to be able to pick up the same sequence for
// the next StartSend(). This is needed for restarting device, otherwise
// it might cause libSRTP to complain about packets being replayed.
// TODO(xians): Remove this workaround after RtpRtcpModule's refactoring
// CL is landed. See issue
// https://code.google.com/p/webrtc/issues/detail?id=2111 .
send_sequence_number_ = _rtpRtcpModule->SequenceNumber();
// Reset sending SSRC and sequence number and triggers direct transmission
// of RTCP BYE
if (_rtpRtcpModule->SetSendingStatus(false) == -1) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceWarning,
"StartSend() RTP/RTCP failed to stop sending");
}
_rtpRtcpModule->SetSendingMediaStatus(false);
return 0;
}
int32_t Channel::StartReceiving() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartReceiving()");
if (channel_state_.Get().receiving) {
return 0;
}
channel_state_.SetReceiving(true);
_numberOfDiscardedPackets = 0;
return 0;
}
int32_t Channel::StopReceiving() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StopReceiving()");
if (!channel_state_.Get().receiving) {
return 0;
}
channel_state_.SetReceiving(false);
return 0;
}
int32_t Channel::RegisterVoiceEngineObserver(VoiceEngineObserver& observer) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RegisterVoiceEngineObserver()");
rtc::CritScope cs(&_callbackCritSect);
if (_voiceEngineObserverPtr) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceError,
"RegisterVoiceEngineObserver() observer already enabled");
return -1;
}
_voiceEngineObserverPtr = &observer;
return 0;
}
int32_t Channel::DeRegisterVoiceEngineObserver() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::DeRegisterVoiceEngineObserver()");
rtc::CritScope cs(&_callbackCritSect);
if (!_voiceEngineObserverPtr) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceWarning,
"DeRegisterVoiceEngineObserver() observer already disabled");
return 0;
}
_voiceEngineObserverPtr = NULL;
return 0;
}
int32_t Channel::GetSendCodec(CodecInst& codec) {
auto send_codec = codec_manager_.GetCodecInst();
if (send_codec) {
codec = *send_codec;
return 0;
}
return -1;
}
int32_t Channel::GetRecCodec(CodecInst& codec) {
return (audio_coding_->ReceiveCodec(&codec));
}
int32_t Channel::SetSendCodec(const CodecInst& codec) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetSendCodec()");
if (!codec_manager_.RegisterEncoder(codec) ||
!codec_manager_.MakeEncoder(&rent_a_codec_, audio_coding_.get())) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"SetSendCodec() failed to register codec to ACM");
return -1;
}
if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
_rtpRtcpModule->DeRegisterSendPayload(codec.pltype);
if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"SetSendCodec() failed to register codec to"
" RTP/RTCP module");
return -1;
}
}
if (_rtpRtcpModule->SetAudioPacketSize(codec.pacsize) != 0) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"SetSendCodec() failed to set audio packet size");
return -1;
}
return 0;
}
void Channel::SetBitRate(int bitrate_bps) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetBitRate(bitrate_bps=%d)", bitrate_bps);
audio_coding_->SetBitRate(bitrate_bps);
retransmission_rate_limiter_->SetMaxRate(bitrate_bps);
}
void Channel::OnIncomingFractionLoss(int fraction_lost) {
network_predictor_->UpdatePacketLossRate(fraction_lost);
uint8_t average_fraction_loss = network_predictor_->GetLossRate();
// Normalizes rate to 0 - 100.
if (audio_coding_->SetPacketLossRate(100 * average_fraction_loss / 255) !=
0) {
assert(false); // This should not happen.
}
}
int32_t Channel::SetVADStatus(bool enableVAD,
ACMVADMode mode,
bool disableDTX) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetVADStatus(mode=%d)", mode);
RTC_DCHECK(!(disableDTX && enableVAD)); // disableDTX mode is deprecated.
if (!codec_manager_.SetVAD(enableVAD, mode) ||
!codec_manager_.MakeEncoder(&rent_a_codec_, audio_coding_.get())) {
_engineStatisticsPtr->SetLastError(VE_AUDIO_CODING_MODULE_ERROR,
kTraceError,
"SetVADStatus() failed to set VAD");
return -1;
}
return 0;
}
int32_t Channel::GetVADStatus(bool& enabledVAD,
ACMVADMode& mode,
bool& disabledDTX) {
const auto* params = codec_manager_.GetStackParams();
enabledVAD = params->use_cng;
mode = params->vad_mode;
disabledDTX = !params->use_cng;
return 0;
}
int32_t Channel::SetRecPayloadType(const CodecInst& codec) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetRecPayloadType()");
if (channel_state_.Get().playing) {
_engineStatisticsPtr->SetLastError(
VE_ALREADY_PLAYING, kTraceError,
"SetRecPayloadType() unable to set PT while playing");
return -1;
}
if (channel_state_.Get().receiving) {
_engineStatisticsPtr->SetLastError(
VE_ALREADY_LISTENING, kTraceError,
"SetRecPayloadType() unable to set PT while listening");
return -1;
}
if (codec.pltype == -1) {
// De-register the selected codec (RTP/RTCP module and ACM)
int8_t pltype(-1);
CodecInst rxCodec = codec;
// Get payload type for the given codec
rtp_payload_registry_->ReceivePayloadType(
rxCodec.plname, rxCodec.plfreq, rxCodec.channels,
(rxCodec.rate < 0) ? 0 : rxCodec.rate, &pltype);
rxCodec.pltype = pltype;
if (rtp_receiver_->DeRegisterReceivePayload(pltype) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceError,
"SetRecPayloadType() RTP/RTCP-module deregistration "
"failed");
return -1;
}
if (audio_coding_->UnregisterReceiveCodec(rxCodec.pltype) != 0) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"SetRecPayloadType() ACM deregistration failed - 1");
return -1;
}
return 0;
}
if (rtp_receiver_->RegisterReceivePayload(
codec.plname, codec.pltype, codec.plfreq, codec.channels,
(codec.rate < 0) ? 0 : codec.rate) != 0) {
// First attempt to register failed => de-register and try again
// TODO(kwiberg): Retrying is probably not necessary, since
// AcmReceiver::AddCodec also retries.
rtp_receiver_->DeRegisterReceivePayload(codec.pltype);
if (rtp_receiver_->RegisterReceivePayload(
codec.plname, codec.pltype, codec.plfreq, codec.channels,
(codec.rate < 0) ? 0 : codec.rate) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceError,
"SetRecPayloadType() RTP/RTCP-module registration failed");
return -1;
}
}
if (!RegisterReceiveCodec(&audio_coding_, &rent_a_codec_, codec)) {
audio_coding_->UnregisterReceiveCodec(codec.pltype);
if (!RegisterReceiveCodec(&audio_coding_, &rent_a_codec_, codec)) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"SetRecPayloadType() ACM registration failed - 1");
return -1;
}
}
return 0;
}
int32_t Channel::GetRecPayloadType(CodecInst& codec) {
int8_t payloadType(-1);
if (rtp_payload_registry_->ReceivePayloadType(
codec.plname, codec.plfreq, codec.channels,
(codec.rate < 0) ? 0 : codec.rate, &payloadType) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceWarning,
"GetRecPayloadType() failed to retrieve RX payload type");
return -1;
}
codec.pltype = payloadType;
return 0;
}
int32_t Channel::SetSendCNPayloadType(int type, PayloadFrequencies frequency) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetSendCNPayloadType()");
CodecInst codec;
int32_t samplingFreqHz(-1);
const size_t kMono = 1;
if (frequency == kFreq32000Hz)
samplingFreqHz = 32000;
else if (frequency == kFreq16000Hz)
samplingFreqHz = 16000;
if (audio_coding_->Codec("CN", &codec, samplingFreqHz, kMono) == -1) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"SetSendCNPayloadType() failed to retrieve default CN codec "
"settings");
return -1;
}
// Modify the payload type (must be set to dynamic range)
codec.pltype = type;
if (!codec_manager_.RegisterEncoder(codec) ||
!codec_manager_.MakeEncoder(&rent_a_codec_, audio_coding_.get())) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"SetSendCNPayloadType() failed to register CN to ACM");
return -1;
}
if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
_rtpRtcpModule->DeRegisterSendPayload(codec.pltype);
if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceError,
"SetSendCNPayloadType() failed to register CN to RTP/RTCP "
"module");
return -1;
}
}
return 0;
}
int Channel::SetOpusMaxPlaybackRate(int frequency_hz) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetOpusMaxPlaybackRate()");
if (audio_coding_->SetOpusMaxPlaybackRate(frequency_hz) != 0) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"SetOpusMaxPlaybackRate() failed to set maximum playback rate");
return -1;
}
return 0;
}
int Channel::SetOpusDtx(bool enable_dtx) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetOpusDtx(%d)", enable_dtx);
int ret = enable_dtx ? audio_coding_->EnableOpusDtx()
: audio_coding_->DisableOpusDtx();
if (ret != 0) {
_engineStatisticsPtr->SetLastError(VE_AUDIO_CODING_MODULE_ERROR,
kTraceError, "SetOpusDtx() failed");
return -1;
}
return 0;
}
int Channel::GetOpusDtx(bool* enabled) {
int success = -1;
audio_coding_->QueryEncoder([&](AudioEncoder const* encoder) {
if (encoder) {
*enabled = encoder->GetDtx();
success = 0;
}
});
return success;
}
int32_t Channel::RegisterExternalTransport(Transport* transport) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RegisterExternalTransport()");
rtc::CritScope cs(&_callbackCritSect);
if (_externalTransport) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceError,
"RegisterExternalTransport() external transport already enabled");
return -1;
}
_externalTransport = true;
_transportPtr = transport;
return 0;
}
int32_t Channel::DeRegisterExternalTransport() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::DeRegisterExternalTransport()");
rtc::CritScope cs(&_callbackCritSect);
if (_transportPtr) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"DeRegisterExternalTransport() all transport is disabled");
} else {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceWarning,
"DeRegisterExternalTransport() external transport already "
"disabled");
}
_externalTransport = false;
_transportPtr = NULL;
return 0;
}
int32_t Channel::ReceivedRTPPacket(const uint8_t* received_packet,
size_t length,
const PacketTime& packet_time) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::ReceivedRTPPacket()");
// Store playout timestamp for the received RTP packet
UpdatePlayoutTimestamp(false);
RTPHeader header;
if (!rtp_header_parser_->Parse(received_packet, length, &header)) {
WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceVoice, _channelId,
"Incoming packet: invalid RTP header");
return -1;
}
header.payload_type_frequency =
rtp_payload_registry_->GetPayloadTypeFrequency(header.payloadType);
if (header.payload_type_frequency < 0)
return -1;
bool in_order = IsPacketInOrder(header);
rtp_receive_statistics_->IncomingPacket(
header, length, IsPacketRetransmitted(header, in_order));
rtp_payload_registry_->SetIncomingPayloadType(header);
return ReceivePacket(received_packet, length, header, in_order) ? 0 : -1;
}
bool Channel::ReceivePacket(const uint8_t* packet,
size_t packet_length,
const RTPHeader& header,
bool in_order) {
if (rtp_payload_registry_->IsRtx(header)) {
return HandleRtxPacket(packet, packet_length, header);
}
const uint8_t* payload = packet + header.headerLength;
assert(packet_length >= header.headerLength);
size_t payload_length = packet_length - header.headerLength;
PayloadUnion payload_specific;
if (!rtp_payload_registry_->GetPayloadSpecifics(header.payloadType,
&payload_specific)) {
return false;
}
return rtp_receiver_->IncomingRtpPacket(header, payload, payload_length,
payload_specific, in_order);
}
bool Channel::HandleRtxPacket(const uint8_t* packet,
size_t packet_length,
const RTPHeader& header) {
if (!rtp_payload_registry_->IsRtx(header))
return false;
// Remove the RTX header and parse the original RTP header.
if (packet_length < header.headerLength)
return false;
if (packet_length > kVoiceEngineMaxIpPacketSizeBytes)
return false;
if (restored_packet_in_use_) {
WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceVoice, _channelId,
"Multiple RTX headers detected, dropping packet");
return false;
}
if (!rtp_payload_registry_->RestoreOriginalPacket(
restored_packet_, packet, &packet_length, rtp_receiver_->SSRC(),
header)) {
WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceVoice, _channelId,
"Incoming RTX packet: invalid RTP header");
return false;
}
restored_packet_in_use_ = true;
bool ret = OnRecoveredPacket(restored_packet_, packet_length);
restored_packet_in_use_ = false;
return ret;
}
bool Channel::IsPacketInOrder(const RTPHeader& header) const {
StreamStatistician* statistician =
rtp_receive_statistics_->GetStatistician(header.ssrc);
if (!statistician)
return false;
return statistician->IsPacketInOrder(header.sequenceNumber);
}
bool Channel::IsPacketRetransmitted(const RTPHeader& header,
bool in_order) const {
// Retransmissions are handled separately if RTX is enabled.
if (rtp_payload_registry_->RtxEnabled())
return false;
StreamStatistician* statistician =
rtp_receive_statistics_->GetStatistician(header.ssrc);
if (!statistician)
return false;
// Check if this is a retransmission.
int64_t min_rtt = 0;
_rtpRtcpModule->RTT(rtp_receiver_->SSRC(), NULL, NULL, &min_rtt, NULL);
return !in_order && statistician->IsRetransmitOfOldPacket(header, min_rtt);
}
int32_t Channel::ReceivedRTCPPacket(const uint8_t* data, size_t length) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::ReceivedRTCPPacket()");
// Store playout timestamp for the received RTCP packet
UpdatePlayoutTimestamp(true);
// Deliver RTCP packet to RTP/RTCP module for parsing
if (_rtpRtcpModule->IncomingRtcpPacket(data, length) == -1) {
_engineStatisticsPtr->SetLastError(
VE_SOCKET_TRANSPORT_MODULE_ERROR, kTraceWarning,
"Channel::IncomingRTPPacket() RTCP packet is invalid");
}
int64_t rtt = GetRTT(true);
if (rtt == 0) {
// Waiting for valid RTT.
return 0;
}
int64_t nack_window_ms = rtt;
if (nack_window_ms < kMinRetransmissionWindowMs) {
nack_window_ms = kMinRetransmissionWindowMs;
} else if (nack_window_ms > kMaxRetransmissionWindowMs) {
nack_window_ms = kMaxRetransmissionWindowMs;
}
retransmission_rate_limiter_->SetWindowSize(nack_window_ms);
uint32_t ntp_secs = 0;
uint32_t ntp_frac = 0;
uint32_t rtp_timestamp = 0;
if (0 !=
_rtpRtcpModule->RemoteNTP(&ntp_secs, &ntp_frac, NULL, NULL,
&rtp_timestamp)) {
// Waiting for RTCP.
return 0;
}
{
rtc::CritScope lock(&ts_stats_lock_);
ntp_estimator_.UpdateRtcpTimestamp(rtt, ntp_secs, ntp_frac, rtp_timestamp);
}
return 0;
}
int Channel::StartPlayingFileLocally(const char* fileName,
bool loop,
FileFormats format,
int startPosition,
float volumeScaling,
int stopPosition,
const CodecInst* codecInst) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartPlayingFileLocally(fileNameUTF8[]=%s, loop=%d,"
" format=%d, volumeScaling=%5.3f, startPosition=%d, "
"stopPosition=%d)",
fileName, loop, format, volumeScaling, startPosition,
stopPosition);
if (channel_state_.Get().output_file_playing) {
_engineStatisticsPtr->SetLastError(
VE_ALREADY_PLAYING, kTraceError,
"StartPlayingFileLocally() is already playing");
return -1;
}
{
rtc::CritScope cs(&_fileCritSect);
if (output_file_player_) {
output_file_player_->RegisterModuleFileCallback(NULL);
output_file_player_.reset();
}
output_file_player_ = FilePlayer::CreateFilePlayer(
_outputFilePlayerId, (const FileFormats)format);
if (!output_file_player_) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"StartPlayingFileLocally() filePlayer format is not correct");
return -1;
}
const uint32_t notificationTime(0);
if (output_file_player_->StartPlayingFile(
fileName, loop, startPosition, volumeScaling, notificationTime,
stopPosition, (const CodecInst*)codecInst) != 0) {
_engineStatisticsPtr->SetLastError(
VE_BAD_FILE, kTraceError,
"StartPlayingFile() failed to start file playout");
output_file_player_->StopPlayingFile();
output_file_player_.reset();
return -1;
}
output_file_player_->RegisterModuleFileCallback(this);
channel_state_.SetOutputFilePlaying(true);
}
if (RegisterFilePlayingToMixer() != 0)
return -1;
return 0;
}
int Channel::StartPlayingFileLocally(InStream* stream,
FileFormats format,
int startPosition,
float volumeScaling,
int stopPosition,
const CodecInst* codecInst) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartPlayingFileLocally(format=%d,"
" volumeScaling=%5.3f, startPosition=%d, stopPosition=%d)",
format, volumeScaling, startPosition, stopPosition);
if (stream == NULL) {
_engineStatisticsPtr->SetLastError(
VE_BAD_FILE, kTraceError,
"StartPlayingFileLocally() NULL as input stream");
return -1;
}
if (channel_state_.Get().output_file_playing) {
_engineStatisticsPtr->SetLastError(
VE_ALREADY_PLAYING, kTraceError,
"StartPlayingFileLocally() is already playing");
return -1;
}
{
rtc::CritScope cs(&_fileCritSect);
// Destroy the old instance
if (output_file_player_) {
output_file_player_->RegisterModuleFileCallback(NULL);
output_file_player_.reset();
}
// Create the instance
output_file_player_ = FilePlayer::CreateFilePlayer(
_outputFilePlayerId, (const FileFormats)format);
if (!output_file_player_) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"StartPlayingFileLocally() filePlayer format isnot correct");
return -1;
}
const uint32_t notificationTime(0);
if (output_file_player_->StartPlayingFile(stream, startPosition,
volumeScaling, notificationTime,
stopPosition, codecInst) != 0) {
_engineStatisticsPtr->SetLastError(VE_BAD_FILE, kTraceError,
"StartPlayingFile() failed to "
"start file playout");
output_file_player_->StopPlayingFile();
output_file_player_.reset();
return -1;
}
output_file_player_->RegisterModuleFileCallback(this);
channel_state_.SetOutputFilePlaying(true);
}
if (RegisterFilePlayingToMixer() != 0)
return -1;
return 0;
}
int Channel::StopPlayingFileLocally() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StopPlayingFileLocally()");
if (!channel_state_.Get().output_file_playing) {
return 0;
}
{
rtc::CritScope cs(&_fileCritSect);
if (output_file_player_->StopPlayingFile() != 0) {
_engineStatisticsPtr->SetLastError(
VE_STOP_RECORDING_FAILED, kTraceError,
"StopPlayingFile() could not stop playing");
return -1;
}
output_file_player_->RegisterModuleFileCallback(NULL);
output_file_player_.reset();
channel_state_.SetOutputFilePlaying(false);
}
// _fileCritSect cannot be taken while calling
// SetAnonymousMixibilityStatus. Refer to comments in
// StartPlayingFileLocally(const char* ...) for more details.
if (_outputMixerPtr->SetAnonymousMixabilityStatus(*this, false) != 0) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CONF_MIX_MODULE_ERROR, kTraceError,
"StopPlayingFile() failed to stop participant from playing as"
"file in the mixer");
return -1;
}
return 0;
}
int Channel::IsPlayingFileLocally() const {
return channel_state_.Get().output_file_playing;
}
int Channel::RegisterFilePlayingToMixer() {
// Return success for not registering for file playing to mixer if:
// 1. playing file before playout is started on that channel.
// 2. starting playout without file playing on that channel.
if (!channel_state_.Get().playing ||
!channel_state_.Get().output_file_playing) {
return 0;
}
// |_fileCritSect| cannot be taken while calling
// SetAnonymousMixabilityStatus() since as soon as the participant is added
// frames can be pulled by the mixer. Since the frames are generated from
// the file, _fileCritSect will be taken. This would result in a deadlock.
if (_outputMixerPtr->SetAnonymousMixabilityStatus(*this, true) != 0) {
channel_state_.SetOutputFilePlaying(false);
rtc::CritScope cs(&_fileCritSect);
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CONF_MIX_MODULE_ERROR, kTraceError,
"StartPlayingFile() failed to add participant as file to mixer");
output_file_player_->StopPlayingFile();
output_file_player_.reset();
return -1;
}
return 0;
}
int Channel::StartPlayingFileAsMicrophone(const char* fileName,
bool loop,
FileFormats format,
int startPosition,
float volumeScaling,
int stopPosition,
const CodecInst* codecInst) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartPlayingFileAsMicrophone(fileNameUTF8[]=%s, "
"loop=%d, format=%d, volumeScaling=%5.3f, startPosition=%d, "
"stopPosition=%d)",
fileName, loop, format, volumeScaling, startPosition,
stopPosition);
rtc::CritScope cs(&_fileCritSect);
if (channel_state_.Get().input_file_playing) {
_engineStatisticsPtr->SetLastError(
VE_ALREADY_PLAYING, kTraceWarning,
"StartPlayingFileAsMicrophone() filePlayer is playing");
return 0;
}
// Destroy the old instance
if (input_file_player_) {
input_file_player_->RegisterModuleFileCallback(NULL);
input_file_player_.reset();
}
// Create the instance
input_file_player_ = FilePlayer::CreateFilePlayer(_inputFilePlayerId,
(const FileFormats)format);
if (!input_file_player_) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"StartPlayingFileAsMicrophone() filePlayer format isnot correct");
return -1;
}
const uint32_t notificationTime(0);
if (input_file_player_->StartPlayingFile(
fileName, loop, startPosition, volumeScaling, notificationTime,
stopPosition, (const CodecInst*)codecInst) != 0) {
_engineStatisticsPtr->SetLastError(
VE_BAD_FILE, kTraceError,
"StartPlayingFile() failed to start file playout");
input_file_player_->StopPlayingFile();
input_file_player_.reset();
return -1;
}
input_file_player_->RegisterModuleFileCallback(this);
channel_state_.SetInputFilePlaying(true);
return 0;
}
int Channel::StartPlayingFileAsMicrophone(InStream* stream,
FileFormats format,
int startPosition,
float volumeScaling,
int stopPosition,
const CodecInst* codecInst) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartPlayingFileAsMicrophone(format=%d, "
"volumeScaling=%5.3f, startPosition=%d, stopPosition=%d)",
format, volumeScaling, startPosition, stopPosition);
if (stream == NULL) {
_engineStatisticsPtr->SetLastError(
VE_BAD_FILE, kTraceError,
"StartPlayingFileAsMicrophone NULL as input stream");
return -1;
}
rtc::CritScope cs(&_fileCritSect);
if (channel_state_.Get().input_file_playing) {
_engineStatisticsPtr->SetLastError(
VE_ALREADY_PLAYING, kTraceWarning,
"StartPlayingFileAsMicrophone() is playing");
return 0;
}
// Destroy the old instance
if (input_file_player_) {
input_file_player_->RegisterModuleFileCallback(NULL);
input_file_player_.reset();
}
// Create the instance
input_file_player_ = FilePlayer::CreateFilePlayer(_inputFilePlayerId,
(const FileFormats)format);
if (!input_file_player_) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"StartPlayingInputFile() filePlayer format isnot correct");
return -1;
}
const uint32_t notificationTime(0);
if (input_file_player_->StartPlayingFile(stream, startPosition, volumeScaling,
notificationTime, stopPosition,
codecInst) != 0) {
_engineStatisticsPtr->SetLastError(VE_BAD_FILE, kTraceError,
"StartPlayingFile() failed to start "
"file playout");
input_file_player_->StopPlayingFile();
input_file_player_.reset();
return -1;
}
input_file_player_->RegisterModuleFileCallback(this);
channel_state_.SetInputFilePlaying(true);
return 0;
}
int Channel::StopPlayingFileAsMicrophone() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StopPlayingFileAsMicrophone()");
rtc::CritScope cs(&_fileCritSect);
if (!channel_state_.Get().input_file_playing) {
return 0;
}
if (input_file_player_->StopPlayingFile() != 0) {
_engineStatisticsPtr->SetLastError(
VE_STOP_RECORDING_FAILED, kTraceError,
"StopPlayingFile() could not stop playing");
return -1;
}
input_file_player_->RegisterModuleFileCallback(NULL);
input_file_player_.reset();
channel_state_.SetInputFilePlaying(false);
return 0;
}
int Channel::IsPlayingFileAsMicrophone() const {
return channel_state_.Get().input_file_playing;
}
int Channel::StartRecordingPlayout(const char* fileName,
const CodecInst* codecInst) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartRecordingPlayout(fileName=%s)", fileName);
if (_outputFileRecording) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, -1),
"StartRecordingPlayout() is already recording");
return 0;
}
FileFormats format;
const uint32_t notificationTime(0); // Not supported in VoE
CodecInst dummyCodec = {100, "L16", 16000, 320, 1, 320000};
if ((codecInst != NULL) &&
((codecInst->channels < 1) || (codecInst->channels > 2))) {
_engineStatisticsPtr->SetLastError(
VE_BAD_ARGUMENT, kTraceError,
"StartRecordingPlayout() invalid compression");
return (-1);
}
if (codecInst == NULL) {
format = kFileFormatPcm16kHzFile;
codecInst = &dummyCodec;
} else if ((STR_CASE_CMP(codecInst->plname, "L16") == 0) ||
(STR_CASE_CMP(codecInst->plname, "PCMU") == 0) ||
(STR_CASE_CMP(codecInst->plname, "PCMA") == 0)) {
format = kFileFormatWavFile;
} else {
format = kFileFormatCompressedFile;
}
rtc::CritScope cs(&_fileCritSect);
// Destroy the old instance
if (output_file_recorder_) {
output_file_recorder_->RegisterModuleFileCallback(NULL);
output_file_recorder_.reset();
}
output_file_recorder_ = FileRecorder::CreateFileRecorder(
_outputFileRecorderId, (const FileFormats)format);
if (!output_file_recorder_) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"StartRecordingPlayout() fileRecorder format isnot correct");
return -1;
}
if (output_file_recorder_->StartRecordingAudioFile(
fileName, (const CodecInst&)*codecInst, notificationTime) != 0) {
_engineStatisticsPtr->SetLastError(
VE_BAD_FILE, kTraceError,
"StartRecordingAudioFile() failed to start file recording");
output_file_recorder_->StopRecording();
output_file_recorder_.reset();
return -1;
}
output_file_recorder_->RegisterModuleFileCallback(this);
_outputFileRecording = true;
return 0;
}
int Channel::StartRecordingPlayout(OutStream* stream,
const CodecInst* codecInst) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::StartRecordingPlayout()");
if (_outputFileRecording) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, -1),
"StartRecordingPlayout() is already recording");
return 0;
}
FileFormats format;
const uint32_t notificationTime(0); // Not supported in VoE
CodecInst dummyCodec = {100, "L16", 16000, 320, 1, 320000};
if (codecInst != NULL && codecInst->channels != 1) {
_engineStatisticsPtr->SetLastError(
VE_BAD_ARGUMENT, kTraceError,
"StartRecordingPlayout() invalid compression");
return (-1);
}
if (codecInst == NULL) {
format = kFileFormatPcm16kHzFile;
codecInst = &dummyCodec;
} else if ((STR_CASE_CMP(codecInst->plname, "L16") == 0) ||
(STR_CASE_CMP(codecInst->plname, "PCMU") == 0) ||
(STR_CASE_CMP(codecInst->plname, "PCMA") == 0)) {
format = kFileFormatWavFile;
} else {
format = kFileFormatCompressedFile;
}
rtc::CritScope cs(&_fileCritSect);
// Destroy the old instance
if (output_file_recorder_) {
output_file_recorder_->RegisterModuleFileCallback(NULL);
output_file_recorder_.reset();
}
output_file_recorder_ = FileRecorder::CreateFileRecorder(
_outputFileRecorderId, (const FileFormats)format);
if (!output_file_recorder_) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"StartRecordingPlayout() fileRecorder format isnot correct");
return -1;
}
if (output_file_recorder_->StartRecordingAudioFile(stream, *codecInst,
notificationTime) != 0) {
_engineStatisticsPtr->SetLastError(VE_BAD_FILE, kTraceError,
"StartRecordingPlayout() failed to "
"start file recording");
output_file_recorder_->StopRecording();
output_file_recorder_.reset();
return -1;
}
output_file_recorder_->RegisterModuleFileCallback(this);
_outputFileRecording = true;
return 0;
}
int Channel::StopRecordingPlayout() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, -1),
"Channel::StopRecordingPlayout()");
if (!_outputFileRecording) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, -1),
"StopRecordingPlayout() isnot recording");
return -1;
}
rtc::CritScope cs(&_fileCritSect);
if (output_file_recorder_->StopRecording() != 0) {
_engineStatisticsPtr->SetLastError(
VE_STOP_RECORDING_FAILED, kTraceError,
"StopRecording() could not stop recording");
return (-1);
}
output_file_recorder_->RegisterModuleFileCallback(NULL);
output_file_recorder_.reset();
_outputFileRecording = false;
return 0;
}
void Channel::SetMixWithMicStatus(bool mix) {
rtc::CritScope cs(&_fileCritSect);
_mixFileWithMicrophone = mix;
}
int Channel::GetSpeechOutputLevel(uint32_t& level) const {
int8_t currentLevel = _outputAudioLevel.Level();
level = static_cast<int32_t>(currentLevel);
return 0;
}
int Channel::GetSpeechOutputLevelFullRange(uint32_t& level) const {
int16_t currentLevel = _outputAudioLevel.LevelFullRange();
level = static_cast<int32_t>(currentLevel);
return 0;
}
int Channel::SetInputMute(bool enable) {
rtc::CritScope cs(&volume_settings_critsect_);
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetMute(enable=%d)", enable);
input_mute_ = enable;
return 0;
}
bool Channel::InputMute() const {
rtc::CritScope cs(&volume_settings_critsect_);
return input_mute_;
}
int Channel::SetOutputVolumePan(float left, float right) {
rtc::CritScope cs(&volume_settings_critsect_);
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetOutputVolumePan()");
_panLeft = left;
_panRight = right;
return 0;
}
int Channel::GetOutputVolumePan(float& left, float& right) const {
rtc::CritScope cs(&volume_settings_critsect_);
left = _panLeft;
right = _panRight;
return 0;
}
int Channel::SetChannelOutputVolumeScaling(float scaling) {
rtc::CritScope cs(&volume_settings_critsect_);
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetChannelOutputVolumeScaling()");
_outputGain = scaling;
return 0;
}
int Channel::GetChannelOutputVolumeScaling(float& scaling) const {
rtc::CritScope cs(&volume_settings_critsect_);
scaling = _outputGain;
return 0;
}
int Channel::SendTelephoneEventOutband(int event, int duration_ms) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendTelephoneEventOutband(...)");
RTC_DCHECK_LE(0, event);
RTC_DCHECK_GE(255, event);
RTC_DCHECK_LE(0, duration_ms);
RTC_DCHECK_GE(65535, duration_ms);
if (!Sending()) {
return -1;
}
if (_rtpRtcpModule->SendTelephoneEventOutband(
event, duration_ms, kTelephoneEventAttenuationdB) != 0) {
_engineStatisticsPtr->SetLastError(
VE_SEND_DTMF_FAILED, kTraceWarning,
"SendTelephoneEventOutband() failed to send event");
return -1;
}
return 0;
}
int Channel::SetSendTelephoneEventPayloadType(int payload_type) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetSendTelephoneEventPayloadType()");
RTC_DCHECK_LE(0, payload_type);
RTC_DCHECK_GE(127, payload_type);
CodecInst codec = {0};
codec.plfreq = 8000;
codec.pltype = payload_type;
memcpy(codec.plname, "telephone-event", 16);
if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
_rtpRtcpModule->DeRegisterSendPayload(codec.pltype);
if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceError,
"SetSendTelephoneEventPayloadType() failed to register send"
"payload type");
return -1;
}
}
return 0;
}
int Channel::VoiceActivityIndicator(int& activity) {
activity = _sendFrameType;
return 0;
}
int Channel::SetLocalSSRC(unsigned int ssrc) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetLocalSSRC()");
if (channel_state_.Get().sending) {
_engineStatisticsPtr->SetLastError(VE_ALREADY_SENDING, kTraceError,
"SetLocalSSRC() already sending");
return -1;
}
_rtpRtcpModule->SetSSRC(ssrc);
return 0;
}
int Channel::GetLocalSSRC(unsigned int& ssrc) {
ssrc = _rtpRtcpModule->SSRC();
return 0;
}
int Channel::GetRemoteSSRC(unsigned int& ssrc) {
ssrc = rtp_receiver_->SSRC();
return 0;
}
int Channel::SetSendAudioLevelIndicationStatus(bool enable, unsigned char id) {
_includeAudioLevelIndication = enable;
return SetSendRtpHeaderExtension(enable, kRtpExtensionAudioLevel, id);
}
int Channel::SetReceiveAudioLevelIndicationStatus(bool enable,
unsigned char id) {
rtp_header_parser_->DeregisterRtpHeaderExtension(kRtpExtensionAudioLevel);
if (enable &&
!rtp_header_parser_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel,
id)) {
return -1;
}
return 0;
}
int Channel::SetSendAbsoluteSenderTimeStatus(bool enable, unsigned char id) {
return SetSendRtpHeaderExtension(enable, kRtpExtensionAbsoluteSendTime, id);
}
int Channel::SetReceiveAbsoluteSenderTimeStatus(bool enable, unsigned char id) {
rtp_header_parser_->DeregisterRtpHeaderExtension(
kRtpExtensionAbsoluteSendTime);
if (enable &&
!rtp_header_parser_->RegisterRtpHeaderExtension(
kRtpExtensionAbsoluteSendTime, id)) {
return -1;
}
return 0;
}
void Channel::EnableSendTransportSequenceNumber(int id) {
int ret =
SetSendRtpHeaderExtension(true, kRtpExtensionTransportSequenceNumber, id);
RTC_DCHECK_EQ(0, ret);
}
void Channel::EnableReceiveTransportSequenceNumber(int id) {
rtp_header_parser_->DeregisterRtpHeaderExtension(
kRtpExtensionTransportSequenceNumber);
bool ret = rtp_header_parser_->RegisterRtpHeaderExtension(
kRtpExtensionTransportSequenceNumber, id);
RTC_DCHECK(ret);
}
void Channel::RegisterSenderCongestionControlObjects(
RtpPacketSender* rtp_packet_sender,
TransportFeedbackObserver* transport_feedback_observer,
PacketRouter* packet_router) {
RTC_DCHECK(rtp_packet_sender);
RTC_DCHECK(transport_feedback_observer);
RTC_DCHECK(packet_router && !packet_router_);
feedback_observer_proxy_->SetTransportFeedbackObserver(
transport_feedback_observer);
seq_num_allocator_proxy_->SetSequenceNumberAllocator(packet_router);
rtp_packet_sender_proxy_->SetPacketSender(rtp_packet_sender);
_rtpRtcpModule->SetStorePacketsStatus(true, 600);
packet_router->AddRtpModule(_rtpRtcpModule.get());
packet_router_ = packet_router;
}
void Channel::RegisterReceiverCongestionControlObjects(
PacketRouter* packet_router) {
RTC_DCHECK(packet_router && !packet_router_);
packet_router->AddRtpModule(_rtpRtcpModule.get());
packet_router_ = packet_router;
}
void Channel::ResetCongestionControlObjects() {
RTC_DCHECK(packet_router_);
_rtpRtcpModule->SetStorePacketsStatus(false, 600);
feedback_observer_proxy_->SetTransportFeedbackObserver(nullptr);
seq_num_allocator_proxy_->SetSequenceNumberAllocator(nullptr);
packet_router_->RemoveRtpModule(_rtpRtcpModule.get());
packet_router_ = nullptr;
rtp_packet_sender_proxy_->SetPacketSender(nullptr);
}
void Channel::SetRTCPStatus(bool enable) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetRTCPStatus()");
_rtpRtcpModule->SetRTCPStatus(enable ? RtcpMode::kCompound : RtcpMode::kOff);
}
int Channel::GetRTCPStatus(bool& enabled) {
RtcpMode method = _rtpRtcpModule->RTCP();
enabled = (method != RtcpMode::kOff);
return 0;
}
int Channel::SetRTCP_CNAME(const char cName[256]) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetRTCP_CNAME()");
if (_rtpRtcpModule->SetCNAME(cName) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceError,
"SetRTCP_CNAME() failed to set RTCP CNAME");
return -1;
}
return 0;
}
int Channel::GetRemoteRTCP_CNAME(char cName[256]) {
if (cName == NULL) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"GetRemoteRTCP_CNAME() invalid CNAME input buffer");
return -1;
}
char cname[RTCP_CNAME_SIZE];
const uint32_t remoteSSRC = rtp_receiver_->SSRC();
if (_rtpRtcpModule->RemoteCNAME(remoteSSRC, cname) != 0) {
_engineStatisticsPtr->SetLastError(
VE_CANNOT_RETRIEVE_CNAME, kTraceError,
"GetRemoteRTCP_CNAME() failed to retrieve remote RTCP CNAME");
return -1;
}
strcpy(cName, cname);
return 0;
}
int Channel::GetRemoteRTCPData(unsigned int& NTPHigh,
unsigned int& NTPLow,
unsigned int& timestamp,
unsigned int& playoutTimestamp,
unsigned int* jitter,
unsigned short* fractionLost) {
// --- Information from sender info in received Sender Reports
RTCPSenderInfo senderInfo;
if (_rtpRtcpModule->RemoteRTCPStat(&senderInfo) != 0) {
_engineStatisticsPtr->SetLastError(
VE_RTP_RTCP_MODULE_ERROR, kTraceError,
"GetRemoteRTCPData() failed to retrieve sender info for remote "
"side");
return -1;
}
// We only utilize 12 out of 20 bytes in the sender info (ignores packet
// and octet count)
NTPHigh = senderInfo.NTPseconds;
NTPLow = senderInfo.NTPfraction;
timestamp = senderInfo.RTPtimeStamp;
// --- Locally derived information
// This value is updated on each incoming RTCP packet (0 when no packet
// has been received)
playoutTimestamp = playout_timestamp_rtcp_;
if (NULL != jitter || NULL != fractionLost) {
// Get all RTCP receiver report blocks that have been received on this
// channel. If we receive RTP packets from a remote source we know the
// remote SSRC and use the report block from him.
// Otherwise use the first report block.
std::vector<RTCPReportBlock> remote_stats;
if (_rtpRtcpModule->RemoteRTCPStat(&remote_stats) != 0 ||
remote_stats.empty()) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"GetRemoteRTCPData() failed to measure statistics due"
" to lack of received RTP and/or RTCP packets");
return -1;
}
uint32_t remoteSSRC = rtp_receiver_->SSRC();
std::vector<RTCPReportBlock>::const_iterator it = remote_stats.begin();
for (; it != remote_stats.end(); ++it) {
if (it->remoteSSRC == remoteSSRC)
break;
}
if (it == remote_stats.end()) {
// If we have not received any RTCP packets from this SSRC it probably
// means that we have not received any RTP packets.
// Use the first received report block instead.
it = remote_stats.begin();
remoteSSRC = it->remoteSSRC;
}
if (jitter) {
*jitter = it->jitter;
}
if (fractionLost) {
*fractionLost = it->fractionLost;
}
}
return 0;
}
int Channel::SendApplicationDefinedRTCPPacket(
unsigned char subType,
unsigned int name,
const char* data,
unsigned short dataLengthInBytes) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SendApplicationDefinedRTCPPacket()");
if (!channel_state_.Get().sending) {
_engineStatisticsPtr->SetLastError(
VE_NOT_SENDING, kTraceError,
"SendApplicationDefinedRTCPPacket() not sending");
return -1;
}
if (NULL == data) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"SendApplicationDefinedRTCPPacket() invalid data value");
return -1;
}
if (dataLengthInBytes % 4 != 0) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"SendApplicationDefinedRTCPPacket() invalid length value");
return -1;
}
RtcpMode status = _rtpRtcpModule->RTCP();
if (status == RtcpMode::kOff) {
_engineStatisticsPtr->SetLastError(
VE_RTCP_ERROR, kTraceError,
"SendApplicationDefinedRTCPPacket() RTCP is disabled");
return -1;
}
// Create and schedule the RTCP APP packet for transmission
if (_rtpRtcpModule->SetRTCPApplicationSpecificData(
subType, name, (const unsigned char*)data, dataLengthInBytes) != 0) {
_engineStatisticsPtr->SetLastError(
VE_SEND_ERROR, kTraceError,
"SendApplicationDefinedRTCPPacket() failed to send RTCP packet");
return -1;
}
return 0;
}
int Channel::GetRTPStatistics(unsigned int& averageJitterMs,
unsigned int& maxJitterMs,
unsigned int& discardedPackets) {
// The jitter statistics is updated for each received RTP packet and is
// based on received packets.
if (_rtpRtcpModule->RTCP() == RtcpMode::kOff) {
// If RTCP is off, there is no timed thread in the RTCP module regularly
// generating new stats, trigger the update manually here instead.
StreamStatistician* statistician =
rtp_receive_statistics_->GetStatistician(rtp_receiver_->SSRC());
if (statistician) {
// Don't use returned statistics, use data from proxy instead so that
// max jitter can be fetched atomically.
RtcpStatistics s;
statistician->GetStatistics(&s, true);
}
}
ChannelStatistics stats = statistics_proxy_->GetStats();
const int32_t playoutFrequency = audio_coding_->PlayoutFrequency();
if (playoutFrequency > 0) {
// Scale RTP statistics given the current playout frequency
maxJitterMs = stats.max_jitter / (playoutFrequency / 1000);
averageJitterMs = stats.rtcp.jitter / (playoutFrequency / 1000);
}
discardedPackets = _numberOfDiscardedPackets;
return 0;
}
int Channel::GetRemoteRTCPReportBlocks(
std::vector<ReportBlock>* report_blocks) {
if (report_blocks == NULL) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"GetRemoteRTCPReportBlock()s invalid report_blocks.");
return -1;
}
// Get the report blocks from the latest received RTCP Sender or Receiver
// Report. Each element in the vector contains the sender's SSRC and a
// report block according to RFC 3550.
std::vector<RTCPReportBlock> rtcp_report_blocks;
if (_rtpRtcpModule->RemoteRTCPStat(&rtcp_report_blocks) != 0) {
return -1;
}
if (rtcp_report_blocks.empty())
return 0;
std::vector<RTCPReportBlock>::const_iterator it = rtcp_report_blocks.begin();
for (; it != rtcp_report_blocks.end(); ++it) {
ReportBlock report_block;
report_block.sender_SSRC = it->remoteSSRC;
report_block.source_SSRC = it->sourceSSRC;
report_block.fraction_lost = it->fractionLost;
report_block.cumulative_num_packets_lost = it->cumulativeLost;
report_block.extended_highest_sequence_number = it->extendedHighSeqNum;
report_block.interarrival_jitter = it->jitter;
report_block.last_SR_timestamp = it->lastSR;
report_block.delay_since_last_SR = it->delaySinceLastSR;
report_blocks->push_back(report_block);
}
return 0;
}
int Channel::GetRTPStatistics(CallStatistics& stats) {
// --- RtcpStatistics
// The jitter statistics is updated for each received RTP packet and is
// based on received packets.
RtcpStatistics statistics;
StreamStatistician* statistician =
rtp_receive_statistics_->GetStatistician(rtp_receiver_->SSRC());
if (statistician) {
statistician->GetStatistics(&statistics,
_rtpRtcpModule->RTCP() == RtcpMode::kOff);
}
stats.fractionLost = statistics.fraction_lost;
stats.cumulativeLost = statistics.cumulative_lost;
stats.extendedMax = statistics.extended_max_sequence_number;
stats.jitterSamples = statistics.jitter;
// --- RTT
stats.rttMs = GetRTT(true);
// --- Data counters
size_t bytesSent(0);
uint32_t packetsSent(0);
size_t bytesReceived(0);
uint32_t packetsReceived(0);
if (statistician) {
statistician->GetDataCounters(&bytesReceived, &packetsReceived);
}
if (_rtpRtcpModule->DataCountersRTP(&bytesSent, &packetsSent) != 0) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"GetRTPStatistics() failed to retrieve RTP datacounters =>"
" output will not be complete");
}
stats.bytesSent = bytesSent;
stats.packetsSent = packetsSent;
stats.bytesReceived = bytesReceived;
stats.packetsReceived = packetsReceived;
// --- Timestamps
{
rtc::CritScope lock(&ts_stats_lock_);
stats.capture_start_ntp_time_ms_ = capture_start_ntp_time_ms_;
}
return 0;
}
int Channel::SetCodecFECStatus(bool enable) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetCodecFECStatus()");
if (!codec_manager_.SetCodecFEC(enable) ||
!codec_manager_.MakeEncoder(&rent_a_codec_, audio_coding_.get())) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"SetCodecFECStatus() failed to set FEC state");
return -1;
}
return 0;
}
bool Channel::GetCodecFECStatus() {
return codec_manager_.GetStackParams()->use_codec_fec;
}
void Channel::SetNACKStatus(bool enable, int maxNumberOfPackets) {
// None of these functions can fail.
// If pacing is enabled we always store packets.
if (!pacing_enabled_)
_rtpRtcpModule->SetStorePacketsStatus(enable, maxNumberOfPackets);
rtp_receive_statistics_->SetMaxReorderingThreshold(maxNumberOfPackets);
if (enable)
audio_coding_->EnableNack(maxNumberOfPackets);
else
audio_coding_->DisableNack();
}
// Called when we are missing one or more packets.
int Channel::ResendPackets(const uint16_t* sequence_numbers, int length) {
return _rtpRtcpModule->SendNACK(sequence_numbers, length);
}
uint32_t Channel::Demultiplex(const AudioFrame& audioFrame) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::Demultiplex()");
_audioFrame.CopyFrom(audioFrame);
_audioFrame.id_ = _channelId;
return 0;
}
void Channel::Demultiplex(const int16_t* audio_data,
int sample_rate,
size_t number_of_frames,
size_t number_of_channels) {
CodecInst codec;
GetSendCodec(codec);
// Never upsample or upmix the capture signal here. This should be done at the
// end of the send chain.
_audioFrame.sample_rate_hz_ = std::min(codec.plfreq, sample_rate);
_audioFrame.num_channels_ = std::min(number_of_channels, codec.channels);
RemixAndResample(audio_data, number_of_frames, number_of_channels,
sample_rate, &input_resampler_, &_audioFrame);
}
uint32_t Channel::PrepareEncodeAndSend(int mixingFrequency) {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::PrepareEncodeAndSend()");
if (_audioFrame.samples_per_channel_ == 0) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::PrepareEncodeAndSend() invalid audio frame");
return 0xFFFFFFFF;
}
if (channel_state_.Get().input_file_playing) {
MixOrReplaceAudioWithFile(mixingFrequency);
}
bool is_muted = InputMute(); // Cache locally as InputMute() takes a lock.
AudioFrameOperations::Mute(&_audioFrame, previous_frame_muted_, is_muted);
if (channel_state_.Get().input_external_media) {
rtc::CritScope cs(&_callbackCritSect);
const bool isStereo = (_audioFrame.num_channels_ == 2);
if (_inputExternalMediaCallbackPtr) {
_inputExternalMediaCallbackPtr->Process(
_channelId, kRecordingPerChannel, (int16_t*)_audioFrame.data_,
_audioFrame.samples_per_channel_, _audioFrame.sample_rate_hz_,
isStereo);
}
}
if (_includeAudioLevelIndication) {
size_t length =
_audioFrame.samples_per_channel_ * _audioFrame.num_channels_;
RTC_CHECK_LE(length, sizeof(_audioFrame.data_));
if (is_muted && previous_frame_muted_) {
rms_level_.ProcessMuted(length);
} else {
rms_level_.Process(_audioFrame.data_, length);
}
}
previous_frame_muted_ = is_muted;
return 0;
}
uint32_t Channel::EncodeAndSend() {
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::EncodeAndSend()");
assert(_audioFrame.num_channels_ <= 2);
if (_audioFrame.samples_per_channel_ == 0) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::EncodeAndSend() invalid audio frame");
return 0xFFFFFFFF;
}
_audioFrame.id_ = _channelId;
// --- Add 10ms of raw (PCM) audio data to the encoder @ 32kHz.
// The ACM resamples internally.
_audioFrame.timestamp_ = _timeStamp;
// This call will trigger AudioPacketizationCallback::SendData if encoding
// is done and payload is ready for packetization and transmission.
// Otherwise, it will return without invoking the callback.
if (audio_coding_->Add10MsData((AudioFrame&)_audioFrame) < 0) {
WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::EncodeAndSend() ACM encoding failed");
return 0xFFFFFFFF;
}
_timeStamp += static_cast<uint32_t>(_audioFrame.samples_per_channel_);
return 0;
}
void Channel::DisassociateSendChannel(int channel_id) {
rtc::CritScope lock(&assoc_send_channel_lock_);
Channel* channel = associate_send_channel_.channel();
if (channel && channel->ChannelId() == channel_id) {
// If this channel is associated with a send channel of the specified
// Channel ID, disassociate with it.
ChannelOwner ref(NULL);
associate_send_channel_ = ref;
}
}
void Channel::SetRtcEventLog(RtcEventLog* event_log) {
event_log_proxy_->SetEventLog(event_log);
}
int Channel::RegisterExternalMediaProcessing(ProcessingTypes type,
VoEMediaProcess& processObject) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RegisterExternalMediaProcessing()");
rtc::CritScope cs(&_callbackCritSect);
if (kPlaybackPerChannel == type) {
if (_outputExternalMediaCallbackPtr) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceError,
"Channel::RegisterExternalMediaProcessing() "
"output external media already enabled");
return -1;
}
_outputExternalMediaCallbackPtr = &processObject;
_outputExternalMedia = true;
} else if (kRecordingPerChannel == type) {
if (_inputExternalMediaCallbackPtr) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceError,
"Channel::RegisterExternalMediaProcessing() "
"output external media already enabled");
return -1;
}
_inputExternalMediaCallbackPtr = &processObject;
channel_state_.SetInputExternalMedia(true);
}
return 0;
}
int Channel::DeRegisterExternalMediaProcessing(ProcessingTypes type) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::DeRegisterExternalMediaProcessing()");
rtc::CritScope cs(&_callbackCritSect);
if (kPlaybackPerChannel == type) {
if (!_outputExternalMediaCallbackPtr) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceWarning,
"Channel::DeRegisterExternalMediaProcessing() "
"output external media already disabled");
return 0;
}
_outputExternalMedia = false;
_outputExternalMediaCallbackPtr = NULL;
} else if (kRecordingPerChannel == type) {
if (!_inputExternalMediaCallbackPtr) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceWarning,
"Channel::DeRegisterExternalMediaProcessing() "
"input external media already disabled");
return 0;
}
channel_state_.SetInputExternalMedia(false);
_inputExternalMediaCallbackPtr = NULL;
}
return 0;
}
int Channel::SetExternalMixing(bool enabled) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetExternalMixing(enabled=%d)", enabled);
if (channel_state_.Get().playing) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_OPERATION, kTraceError,
"Channel::SetExternalMixing() "
"external mixing cannot be changed while playing.");
return -1;
}
_externalMixing = enabled;
return 0;
}
int Channel::GetNetworkStatistics(NetworkStatistics& stats) {
return audio_coding_->GetNetworkStatistics(&stats);
}
void Channel::GetDecodingCallStatistics(AudioDecodingCallStats* stats) const {
audio_coding_->GetDecodingCallStatistics(stats);
}
bool Channel::GetDelayEstimate(int* jitter_buffer_delay_ms,
int* playout_buffer_delay_ms) const {
rtc::CritScope lock(&video_sync_lock_);
*jitter_buffer_delay_ms = audio_coding_->FilteredCurrentDelayMs();
*playout_buffer_delay_ms = playout_delay_ms_;
return true;
}
uint32_t Channel::GetDelayEstimate() const {
int jitter_buffer_delay_ms = 0;
int playout_buffer_delay_ms = 0;
GetDelayEstimate(&jitter_buffer_delay_ms, &playout_buffer_delay_ms);
return jitter_buffer_delay_ms + playout_buffer_delay_ms;
}
int Channel::LeastRequiredDelayMs() const {
return audio_coding_->LeastRequiredDelayMs();
}
int Channel::SetMinimumPlayoutDelay(int delayMs) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetMinimumPlayoutDelay()");
if ((delayMs < kVoiceEngineMinMinPlayoutDelayMs) ||
(delayMs > kVoiceEngineMaxMinPlayoutDelayMs)) {
_engineStatisticsPtr->SetLastError(
VE_INVALID_ARGUMENT, kTraceError,
"SetMinimumPlayoutDelay() invalid min delay");
return -1;
}
if (audio_coding_->SetMinimumPlayoutDelay(delayMs) != 0) {
_engineStatisticsPtr->SetLastError(
VE_AUDIO_CODING_MODULE_ERROR, kTraceError,
"SetMinimumPlayoutDelay() failed to set min playout delay");
return -1;
}
return 0;
}
int Channel::GetPlayoutTimestamp(unsigned int& timestamp) {
uint32_t playout_timestamp_rtp = 0;
{
rtc::CritScope lock(&video_sync_lock_);
playout_timestamp_rtp = playout_timestamp_rtp_;
}
if (playout_timestamp_rtp == 0) {
_engineStatisticsPtr->SetLastError(
VE_CANNOT_RETRIEVE_VALUE, kTraceStateInfo,
"GetPlayoutTimestamp() failed to retrieve timestamp");
return -1;
}
timestamp = playout_timestamp_rtp;
return 0;
}
int Channel::SetInitTimestamp(unsigned int timestamp) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetInitTimestamp()");
if (channel_state_.Get().sending) {
_engineStatisticsPtr->SetLastError(VE_SENDING, kTraceError,
"SetInitTimestamp() already sending");
return -1;
}
_rtpRtcpModule->SetStartTimestamp(timestamp);
return 0;
}
int Channel::SetInitSequenceNumber(short sequenceNumber) {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::SetInitSequenceNumber()");
if (channel_state_.Get().sending) {
_engineStatisticsPtr->SetLastError(
VE_SENDING, kTraceError, "SetInitSequenceNumber() already sending");
return -1;
}
_rtpRtcpModule->SetSequenceNumber(sequenceNumber);
return 0;
}
int Channel::GetRtpRtcp(RtpRtcp** rtpRtcpModule,
RtpReceiver** rtp_receiver) const {
*rtpRtcpModule = _rtpRtcpModule.get();
*rtp_receiver = rtp_receiver_.get();
return 0;
}
// TODO(andrew): refactor Mix functions here and in transmit_mixer.cc to use
// a shared helper.
int32_t Channel::MixOrReplaceAudioWithFile(int mixingFrequency) {
std::unique_ptr<int16_t[]> fileBuffer(new int16_t[640]);
size_t fileSamples(0);
{
rtc::CritScope cs(&_fileCritSect);
if (!input_file_player_) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::MixOrReplaceAudioWithFile() fileplayer"
" doesnt exist");
return -1;
}
if (input_file_player_->Get10msAudioFromFile(fileBuffer.get(), &fileSamples,
mixingFrequency) == -1) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::MixOrReplaceAudioWithFile() file mixing "
"failed");
return -1;
}
if (fileSamples == 0) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::MixOrReplaceAudioWithFile() file is ended");
return 0;
}
}
assert(_audioFrame.samples_per_channel_ == fileSamples);
if (_mixFileWithMicrophone) {
// Currently file stream is always mono.
// TODO(xians): Change the code when FilePlayer supports real stereo.
MixWithSat(_audioFrame.data_, _audioFrame.num_channels_, fileBuffer.get(),
1, fileSamples);
} else {
// Replace ACM audio with file.
// Currently file stream is always mono.
// TODO(xians): Change the code when FilePlayer supports real stereo.
_audioFrame.UpdateFrame(
_channelId, 0xFFFFFFFF, fileBuffer.get(), fileSamples, mixingFrequency,
AudioFrame::kNormalSpeech, AudioFrame::kVadUnknown, 1);
}
return 0;
}
int32_t Channel::MixAudioWithFile(AudioFrame& audioFrame, int mixingFrequency) {
assert(mixingFrequency <= 48000);
std::unique_ptr<int16_t[]> fileBuffer(new int16_t[960]);
size_t fileSamples(0);
{
rtc::CritScope cs(&_fileCritSect);
if (!output_file_player_) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::MixAudioWithFile() file mixing failed");
return -1;
}
// We should get the frequency we ask for.
if (output_file_player_->Get10msAudioFromFile(
fileBuffer.get(), &fileSamples, mixingFrequency) == -1) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::MixAudioWithFile() file mixing failed");
return -1;
}
}
if (audioFrame.samples_per_channel_ == fileSamples) {
// Currently file stream is always mono.
// TODO(xians): Change the code when FilePlayer supports real stereo.
MixWithSat(audioFrame.data_, audioFrame.num_channels_, fileBuffer.get(), 1,
fileSamples);
} else {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::MixAudioWithFile() samples_per_channel_(%" PRIuS
") != "
"fileSamples(%" PRIuS ")",
audioFrame.samples_per_channel_, fileSamples);
return -1;
}
return 0;
}
void Channel::UpdatePlayoutTimestamp(bool rtcp) {
jitter_buffer_playout_timestamp_ = audio_coding_->PlayoutTimestamp();
if (!jitter_buffer_playout_timestamp_) {
// This can happen if this channel has not received any RTP packets. In
// this case, NetEq is not capable of computing a playout timestamp.
return;
}
uint16_t delay_ms = 0;
if (_audioDeviceModulePtr->PlayoutDelay(&delay_ms) == -1) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::UpdatePlayoutTimestamp() failed to read playout"
" delay from the ADM");
_engineStatisticsPtr->SetLastError(
VE_CANNOT_RETRIEVE_VALUE, kTraceError,
"UpdatePlayoutTimestamp() failed to retrieve playout delay");
return;
}
RTC_DCHECK(jitter_buffer_playout_timestamp_);
uint32_t playout_timestamp = *jitter_buffer_playout_timestamp_;
// Remove the playout delay.
playout_timestamp -= (delay_ms * (GetPlayoutFrequency() / 1000));
WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::UpdatePlayoutTimestamp() => playoutTimestamp = %lu",
playout_timestamp);
{
rtc::CritScope lock(&video_sync_lock_);
if (rtcp) {
playout_timestamp_rtcp_ = playout_timestamp;
} else {
playout_timestamp_rtp_ = playout_timestamp;
}
playout_delay_ms_ = delay_ms;
}
}
void Channel::RegisterReceiveCodecsToRTPModule() {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RegisterReceiveCodecsToRTPModule()");
CodecInst codec;
const uint8_t nSupportedCodecs = AudioCodingModule::NumberOfCodecs();
for (int idx = 0; idx < nSupportedCodecs; idx++) {
// Open up the RTP/RTCP receiver for all supported codecs
if ((audio_coding_->Codec(idx, &codec) == -1) ||
(rtp_receiver_->RegisterReceivePayload(
codec.plname, codec.pltype, codec.plfreq, codec.channels,
(codec.rate < 0) ? 0 : codec.rate) == -1)) {
WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RegisterReceiveCodecsToRTPModule() unable"
" to register %s (%d/%d/%" PRIuS
"/%d) to RTP/RTCP "
"receiver",
codec.plname, codec.pltype, codec.plfreq, codec.channels,
codec.rate);
} else {
WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
"Channel::RegisterReceiveCodecsToRTPModule() %s "
"(%d/%d/%" PRIuS
"/%d) has been added to the RTP/RTCP "
"receiver",
codec.plname, codec.pltype, codec.plfreq, codec.channels,
codec.rate);
}
}
}
int Channel::SetSendRtpHeaderExtension(bool enable,
RTPExtensionType type,
unsigned char id) {
int error = 0;
_rtpRtcpModule->DeregisterSendRtpHeaderExtension(type);
if (enable) {
error = _rtpRtcpModule->RegisterSendRtpHeaderExtension(type, id);
}
return error;
}
int32_t Channel::GetPlayoutFrequency() const {
int32_t playout_frequency = audio_coding_->PlayoutFrequency();
CodecInst current_recive_codec;
if (audio_coding_->ReceiveCodec(&current_recive_codec) == 0) {
if (STR_CASE_CMP("G722", current_recive_codec.plname) == 0) {
// Even though the actual sampling rate for G.722 audio is
// 16,000 Hz, the RTP clock rate for the G722 payload format is
// 8,000 Hz because that value was erroneously assigned in
// RFC 1890 and must remain unchanged for backward compatibility.
playout_frequency = 8000;
} else if (STR_CASE_CMP("opus", current_recive_codec.plname) == 0) {
// We are resampling Opus internally to 32,000 Hz until all our
// DSP routines can operate at 48,000 Hz, but the RTP clock
// rate for the Opus payload format is standardized to 48,000 Hz,
// because that is the maximum supported decoding sampling rate.
playout_frequency = 48000;
}
}
return playout_frequency;
}
int64_t Channel::GetRTT(bool allow_associate_channel) const {
RtcpMode method = _rtpRtcpModule->RTCP();
if (method == RtcpMode::kOff) {
return 0;
}
std::vector<RTCPReportBlock> report_blocks;
_rtpRtcpModule->RemoteRTCPStat(&report_blocks);
int64_t rtt = 0;
if (report_blocks.empty()) {
if (allow_associate_channel) {
rtc::CritScope lock(&assoc_send_channel_lock_);
Channel* channel = associate_send_channel_.channel();
// Tries to get RTT from an associated channel. This is important for
// receive-only channels.
if (channel) {
// To prevent infinite recursion and deadlock, calling GetRTT of
// associate channel should always use "false" for argument:
// |allow_associate_channel|.
rtt = channel->GetRTT(false);
}
}
return rtt;
}
uint32_t remoteSSRC = rtp_receiver_->SSRC();
std::vector<RTCPReportBlock>::const_iterator it = report_blocks.begin();
for (; it != report_blocks.end(); ++it) {
if (it->remoteSSRC == remoteSSRC)
break;
}
if (it == report_blocks.end()) {
// We have not received packets with SSRC matching the report blocks.
// To calculate RTT we try with the SSRC of the first report block.
// This is very important for send-only channels where we don't know
// the SSRC of the other end.
remoteSSRC = report_blocks[0].remoteSSRC;
}
int64_t avg_rtt = 0;
int64_t max_rtt = 0;
int64_t min_rtt = 0;
if (_rtpRtcpModule->RTT(remoteSSRC, &rtt, &avg_rtt, &min_rtt, &max_rtt) !=
0) {
return 0;
}
return rtt;
}
} // namespace voe
} // namespace webrtc