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webrtc / src / c79be57b479d5bd4a696730f476c457032e6a804 / . / media / engine / webrtc_voice_engine.cc
blob: e2a9cd2490a5d5888261417eced9b149772d881d [file] [log] [blame]
/*
* Copyright (c) 2004 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 "media/engine/webrtc_voice_engine.h"
#include <algorithm>
#include <atomic>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <initializer_list>
#include <iterator>
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include "absl/algorithm/algorithm.h"
#include "absl/algorithm/container.h"
#include "absl/functional/any_invocable.h"
#include "absl/functional/bind_front.h"
#include "absl/strings/match.h"
#include "absl/strings/string_view.h"
#include "api/audio/audio_frame.h"
#include "api/audio/audio_frame_processor.h"
#include "api/audio/audio_mixer.h"
#include "api/audio/audio_processing.h"
#include "api/audio/audio_processing_statistics.h"
#include "api/audio_codecs/audio_codec_pair_id.h"
#include "api/audio_codecs/audio_decoder_factory.h"
#include "api/audio_codecs/audio_encoder.h"
#include "api/audio_codecs/audio_encoder_factory.h"
#include "api/audio_codecs/audio_format.h"
#include "api/audio_options.h"
#include "api/call/audio_sink.h"
#include "api/crypto/crypto_options.h"
#include "api/crypto/frame_decryptor_interface.h"
#include "api/field_trials_view.h"
#include "api/frame_transformer_interface.h"
#include "api/make_ref_counted.h"
#include "api/media_types.h"
#include "api/priority.h"
#include "api/rtc_error.h"
#include "api/rtp_headers.h"
#include "api/rtp_parameters.h"
#include "api/rtp_sender_interface.h"
#include "api/rtp_transceiver_direction.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "api/transport/bitrate_settings.h"
#include "api/transport/rtp/rtp_source.h"
#include "api/units/data_rate.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "call/audio_receive_stream.h"
#include "call/audio_send_stream.h"
#include "call/audio_state.h"
#include "call/call.h"
#include "call/packet_receiver.h"
#include "call/payload_type_picker.h"
#include "call/rtp_config.h"
#include "call/rtp_transport_controller_send_interface.h"
#include "media/base/audio_source.h"
#include "media/base/codec.h"
#include "media/base/media_channel.h"
#include "media/base/media_channel_impl.h"
#include "media/base/media_config.h"
#include "media/base/media_constants.h"
#include "media/base/media_engine.h"
#include "media/base/stream_params.h"
#include "media/engine/adm_helpers.h"
#include "media/engine/webrtc_media_engine.h"
#include "modules/async_audio_processing/async_audio_processing.h"
#include "modules/audio_mixer/audio_mixer_impl.h"
#include "modules/rtp_rtcp/include/rtp_header_extension_map.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
#include "modules/rtp_rtcp/source/rtp_util.h"
#include "rtc_base/checks.h"
#include "rtc_base/dscp.h"
#include "rtc_base/experiments/struct_parameters_parser.h"
#include "rtc_base/logging.h"
#include "rtc_base/race_checker.h"
#include "rtc_base/string_encode.h"
#include "rtc_base/strings/audio_format_to_string.h"
#include "rtc_base/strings/string_builder.h"
#include "rtc_base/strings/string_format.h"
#include "rtc_base/system/file_wrapper.h"
#include "rtc_base/thread_annotations.h"
#include "rtc_base/time_utils.h"
#include "rtc_base/trace_event.h"
#include "system_wrappers/include/metrics.h"
#if WEBRTC_ENABLE_PROTOBUF
#ifdef WEBRTC_ANDROID_PLATFORM_BUILD
#include "external/webrtc/webrtc/modules/audio_coding/audio_network_adaptor/config.pb.h"
#else
#include "modules/audio_coding/audio_network_adaptor/config.pb.h"
#endif
#endif
namespace cricket {
namespace {
using ::webrtc::ParseRtpSsrc;
constexpr size_t kMaxUnsignaledRecvStreams = 4;
constexpr int kNackRtpHistoryMs = 5000;
const int kMinTelephoneEventCode = 0; // RFC4733 (Section 2.3.1)
const int kMaxTelephoneEventCode = 255;
const int kMinPayloadType = 0;
const int kMaxPayloadType = 127;
class ProxySink : public webrtc::AudioSinkInterface {
public:
explicit ProxySink(AudioSinkInterface* sink) : sink_(sink) {
RTC_DCHECK(sink);
}
void OnData(const Data& audio) override { sink_->OnData(audio); }
private:
webrtc::AudioSinkInterface* sink_;
};
bool ValidateStreamParams(const StreamParams& sp) {
if (sp.ssrcs.empty()) {
RTC_DLOG(LS_ERROR) << "No SSRCs in stream parameters: " << sp.ToString();
return false;
}
if (sp.ssrcs.size() > 1) {
RTC_DLOG(LS_ERROR) << "Multiple SSRCs in stream parameters: "
<< sp.ToString();
return false;
}
return true;
}
// Dumps an AudioCodec in RFC 2327-ish format.
std::string ToString(const Codec& codec) {
rtc::StringBuilder ss;
ss << codec.name << "/" << codec.clockrate << "/" << codec.channels;
if (!codec.params.empty()) {
ss << " {";
for (const auto& param : codec.params) {
ss << " " << param.first << "=" << param.second;
}
ss << " }";
}
ss << " (" << codec.id << ")";
return ss.Release();
}
bool IsCodec(const Codec& codec, const char* ref_name) {
return absl::EqualsIgnoreCase(codec.name, ref_name);
}
std::optional<Codec> FindCodec(const std::vector<Codec>& codecs,
const Codec& codec) {
for (const Codec& c : codecs) {
if (c.Matches(codec)) {
return c;
}
}
return std::nullopt;
}
bool VerifyUniquePayloadTypes(const std::vector<Codec>& codecs) {
if (codecs.empty()) {
return true;
}
std::vector<int> payload_types;
absl::c_transform(codecs, std::back_inserter(payload_types),
[](const Codec& codec) { return codec.id; });
absl::c_sort(payload_types);
return absl::c_adjacent_find(payload_types) == payload_types.end();
}
std::optional<std::string> GetAudioNetworkAdaptorConfig(
const AudioOptions& options) {
if (options.audio_network_adaptor && *options.audio_network_adaptor &&
options.audio_network_adaptor_config) {
// Turn on audio network adaptor only when `options_.audio_network_adaptor`
// equals true and `options_.audio_network_adaptor_config` has a value.
return options.audio_network_adaptor_config;
}
return std::nullopt;
}
// Returns its smallest positive argument. If neither argument is positive,
// returns an arbitrary nonpositive value.
int MinPositive(int a, int b) {
if (a <= 0) {
return b;
}
if (b <= 0) {
return a;
}
return std::min(a, b);
}
// `max_send_bitrate_bps` is the bitrate from "b=" in SDP.
// `rtp_max_bitrate_bps` is the bitrate from RtpSender::SetParameters.
std::optional<int> ComputeSendBitrate(int max_send_bitrate_bps,
std::optional<int> rtp_max_bitrate_bps,
const webrtc::AudioCodecSpec& spec) {
// If application-configured bitrate is set, take minimum of that and SDP
// bitrate.
const int bps = rtp_max_bitrate_bps
? MinPositive(max_send_bitrate_bps, *rtp_max_bitrate_bps)
: max_send_bitrate_bps;
if (bps <= 0) {
return spec.info.default_bitrate_bps;
}
if (bps < spec.info.min_bitrate_bps) {
// If codec is not multi-rate and `bps` is less than the fixed bitrate then
// fail. If codec is not multi-rate and `bps` exceeds or equal the fixed
// bitrate then ignore.
RTC_LOG(LS_ERROR) << "Failed to set codec " << spec.format.name
<< " to bitrate " << bps
<< " bps"
", requires at least "
<< spec.info.min_bitrate_bps << " bps.";
return std::nullopt;
}
if (spec.info.HasFixedBitrate()) {
return spec.info.default_bitrate_bps;
} else {
// If codec is multi-rate then just set the bitrate.
return std::min(bps, spec.info.max_bitrate_bps);
}
}
struct AdaptivePtimeConfig {
bool enabled = false;
webrtc::DataRate min_payload_bitrate = webrtc::DataRate::KilobitsPerSec(16);
// Value is chosen to ensure FEC can be encoded, see LBRR_WB_MIN_RATE_BPS in
// libopus.
webrtc::DataRate min_encoder_bitrate = webrtc::DataRate::KilobitsPerSec(16);
bool use_slow_adaptation = true;
std::optional<std::string> audio_network_adaptor_config;
std::unique_ptr<webrtc::StructParametersParser> Parser() {
return webrtc::StructParametersParser::Create( //
"enabled", &enabled, //
"min_payload_bitrate", &min_payload_bitrate, //
"min_encoder_bitrate", &min_encoder_bitrate, //
"use_slow_adaptation", &use_slow_adaptation);
}
explicit AdaptivePtimeConfig(const webrtc::FieldTrialsView& trials) {
Parser()->Parse(trials.Lookup("WebRTC-Audio-AdaptivePtime"));
#if WEBRTC_ENABLE_PROTOBUF
webrtc::audio_network_adaptor::config::ControllerManager config;
auto* frame_length_controller =
config.add_controllers()->mutable_frame_length_controller_v2();
frame_length_controller->set_min_payload_bitrate_bps(
min_payload_bitrate.bps());
frame_length_controller->set_use_slow_adaptation(use_slow_adaptation);
config.add_controllers()->mutable_bitrate_controller();
audio_network_adaptor_config = config.SerializeAsString();
#endif
}
};
// TODO(tommi): Constructing a receive stream could be made simpler.
// Move some of this boiler plate code into the config structs themselves.
webrtc::AudioReceiveStreamInterface::Config BuildReceiveStreamConfig(
uint32_t remote_ssrc,
uint32_t local_ssrc,
bool use_nack,
bool enable_non_sender_rtt,
const std::vector<std::string>& stream_ids,
const std::vector<webrtc::RtpExtension>& /* extensions */,
webrtc::Transport* rtcp_send_transport,
const rtc::scoped_refptr<webrtc::AudioDecoderFactory>& decoder_factory,
const std::map<int, webrtc::SdpAudioFormat>& decoder_map,
std::optional<webrtc::AudioCodecPairId> codec_pair_id,
size_t jitter_buffer_max_packets,
bool jitter_buffer_fast_accelerate,
int jitter_buffer_min_delay_ms,
rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor,
const webrtc::CryptoOptions& crypto_options,
rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
webrtc::AudioReceiveStreamInterface::Config config;
config.rtp.remote_ssrc = remote_ssrc;
config.rtp.local_ssrc = local_ssrc;
config.rtp.nack.rtp_history_ms = use_nack ? kNackRtpHistoryMs : 0;
config.rtp.rtcp_mode = webrtc::RtcpMode::kCompound;
if (!stream_ids.empty()) {
config.sync_group = stream_ids[0];
}
config.rtcp_send_transport = rtcp_send_transport;
config.enable_non_sender_rtt = enable_non_sender_rtt;
config.decoder_factory = decoder_factory;
config.decoder_map = decoder_map;
config.codec_pair_id = codec_pair_id;
config.jitter_buffer_max_packets = jitter_buffer_max_packets;
config.jitter_buffer_fast_accelerate = jitter_buffer_fast_accelerate;
config.jitter_buffer_min_delay_ms = jitter_buffer_min_delay_ms;
config.frame_decryptor = std::move(frame_decryptor);
config.crypto_options = crypto_options;
config.frame_transformer = std::move(frame_transformer);
return config;
}
// Utility function to check if RED codec and its parameters match a codec spec.
bool CheckRedParameters(
const Codec& red_codec,
const webrtc::AudioSendStream::Config::SendCodecSpec& send_codec_spec) {
if (red_codec.clockrate != send_codec_spec.format.clockrate_hz ||
red_codec.channels != send_codec_spec.format.num_channels) {
return false;
}
// Check the FMTP line for the empty parameter which should match
// <primary codec>/<primary codec>[/...]
auto red_parameters = red_codec.params.find("");
if (red_parameters == red_codec.params.end()) {
RTC_LOG(LS_WARNING) << "audio/RED missing fmtp parameters.";
return false;
}
std::vector<absl::string_view> redundant_payloads =
rtc::split(red_parameters->second, '/');
// 32 is chosen as a maximum upper bound for consistency with the
// red payload splitter.
if (redundant_payloads.size() < 2 || redundant_payloads.size() > 32) {
return false;
}
for (auto pt : redundant_payloads) {
if (pt != rtc::ToString(send_codec_spec.payload_type)) {
return false;
}
}
return true;
}
webrtc::SdpAudioFormat AudioCodecToSdpAudioFormat(const Codec& ac) {
return webrtc::SdpAudioFormat(ac.name, ac.clockrate, ac.channels, ac.params);
}
// Assign the payload types for the codecs of this voice engine.
// This is a "preliminary" pass, done to prime the
// payload type picker with a normal set of PTs.
// TODO: https://issues.webrtc.org/360058654 - remove.
std::vector<Codec> LegacyCollectCodecs(
const std::vector<webrtc::AudioCodecSpec>& specs,
bool allocate_pt) {
// Only used for the legacy "allocate_pt = true" case.
webrtc::PayloadTypePicker pt_mapper;
std::vector<Codec> out;
// Only generate CN payload types for these clockrates:
std::map<int, bool, std::greater<int>> generate_cn = {
{8000, false}, {16000, false}, {32000, false}};
// Only generate telephone-event payload types for these clockrates:
std::map<int, bool, std::greater<int>> generate_dtmf = {
{8000, false}, {16000, false}, {32000, false}, {48000, false}};
for (const auto& spec : specs) {
cricket::Codec codec = CreateAudioCodec(spec.format);
if (allocate_pt) {
auto pt_or_error = pt_mapper.SuggestMapping(codec, nullptr);
// We need to do some extra stuff before adding the main codecs to out.
if (!pt_or_error.ok()) {
continue;
}
codec.id = pt_or_error.value();
}
if (spec.info.supports_network_adaption) {
codec.AddFeedbackParam(
FeedbackParam(kRtcpFbParamTransportCc, kParamValueEmpty));
}
if (spec.info.allow_comfort_noise) {
// Generate a CN entry if the decoder allows it and we support the
// clockrate.
auto cn = generate_cn.find(spec.format.clockrate_hz);
if (cn != generate_cn.end()) {
cn->second = true;
}
}
// Generate a telephone-event entry if we support the clockrate.
auto dtmf = generate_dtmf.find(spec.format.clockrate_hz);
if (dtmf != generate_dtmf.end()) {
dtmf->second = true;
}
out.push_back(codec);
// TODO(hta): Don't assign RED codecs until we know that the PT for Opus
// is final
if (codec.name == kOpusCodecName) {
if (allocate_pt) {
std::string red_fmtp =
rtc::ToString(codec.id) + "/" + rtc::ToString(codec.id);
cricket::Codec red_codec =
CreateAudioCodec({kRedCodecName, 48000, 2, {{"", red_fmtp}}});
red_codec.id = pt_mapper.SuggestMapping(red_codec, nullptr).value();
out.push_back(red_codec);
} else {
// We don't know the PT to put into the RED fmtp parameter yet.
// Leave it out.
cricket::Codec red_codec = CreateAudioCodec({kRedCodecName, 48000, 2});
out.push_back(red_codec);
}
}
}
// Add CN codecs after "proper" audio codecs.
for (const auto& cn : generate_cn) {
if (cn.second) {
cricket::Codec cn_codec = CreateAudioCodec({kCnCodecName, cn.first, 1});
if (allocate_pt) {
cn_codec.id = pt_mapper.SuggestMapping(cn_codec, nullptr).value();
}
out.push_back(cn_codec);
}
}
// Add telephone-event codecs last.
for (const auto& dtmf : generate_dtmf) {
if (dtmf.second) {
cricket::Codec dtmf_codec =
CreateAudioCodec({kDtmfCodecName, dtmf.first, 1});
if (allocate_pt) {
dtmf_codec.id = pt_mapper.SuggestMapping(dtmf_codec, nullptr).value();
}
out.push_back(dtmf_codec);
}
}
return out;
}
} // namespace
WebRtcVoiceEngine::WebRtcVoiceEngine(
webrtc::TaskQueueFactory* task_queue_factory,
webrtc::AudioDeviceModule* adm,
const rtc::scoped_refptr<webrtc::AudioEncoderFactory>& encoder_factory,
const rtc::scoped_refptr<webrtc::AudioDecoderFactory>& decoder_factory,
rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer,
rtc::scoped_refptr<webrtc::AudioProcessing> audio_processing,
std::unique_ptr<webrtc::AudioFrameProcessor> audio_frame_processor,
const webrtc::FieldTrialsView& trials)
: task_queue_factory_(task_queue_factory),
adm_(adm),
encoder_factory_(encoder_factory),
decoder_factory_(decoder_factory),
audio_mixer_(audio_mixer),
apm_(audio_processing),
audio_frame_processor_(std::move(audio_frame_processor)),
minimized_remsampling_on_mobile_trial_enabled_(
trials.IsEnabled("WebRTC-Audio-MinimizeResamplingOnMobile")),
payload_types_in_transport_trial_enabled_(
trials.IsEnabled("WebRTC-PayloadTypesInTransport")) {
RTC_LOG(LS_INFO) << "WebRtcVoiceEngine::WebRtcVoiceEngine";
RTC_DCHECK(decoder_factory);
RTC_DCHECK(encoder_factory);
// The rest of our initialization will happen in Init.
}
WebRtcVoiceEngine::~WebRtcVoiceEngine() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_LOG(LS_INFO) << "WebRtcVoiceEngine::~WebRtcVoiceEngine";
if (initialized_) {
StopAecDump();
// Stop AudioDevice.
adm()->StopPlayout();
adm()->StopRecording();
adm()->RegisterAudioCallback(nullptr);
adm()->Terminate();
}
}
void WebRtcVoiceEngine::Init() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_LOG(LS_INFO) << "WebRtcVoiceEngine::Init";
// TaskQueue expects to be created/destroyed on the same thread.
RTC_DCHECK(!low_priority_worker_queue_);
low_priority_worker_queue_ = task_queue_factory_->CreateTaskQueue(
"rtc-low-prio", webrtc::TaskQueueFactory::Priority::LOW);
// Load our audio codec lists.
RTC_LOG(LS_VERBOSE) << "Supported send codecs in order of preference:";
send_codecs_ =
LegacyCollectCodecs(encoder_factory_->GetSupportedEncoders(),
!payload_types_in_transport_trial_enabled_);
for (const Codec& codec : send_codecs_) {
RTC_LOG(LS_VERBOSE) << ToString(codec);
}
RTC_LOG(LS_VERBOSE) << "Supported recv codecs in order of preference:";
recv_codecs_ =
LegacyCollectCodecs(decoder_factory_->GetSupportedDecoders(),
!payload_types_in_transport_trial_enabled_);
for (const Codec& codec : recv_codecs_) {
RTC_LOG(LS_VERBOSE) << ToString(codec);
}
#if defined(WEBRTC_INCLUDE_INTERNAL_AUDIO_DEVICE)
// No ADM supplied? Create a default one.
if (!adm_) {
adm_ = webrtc::AudioDeviceModule::Create(
webrtc::AudioDeviceModule::kPlatformDefaultAudio, task_queue_factory_);
}
#endif // WEBRTC_INCLUDE_INTERNAL_AUDIO_DEVICE
RTC_CHECK(adm());
webrtc::adm_helpers::Init(adm());
// Set up AudioState.
{
webrtc::AudioState::Config config;
if (audio_mixer_) {
config.audio_mixer = audio_mixer_;
} else {
config.audio_mixer = webrtc::AudioMixerImpl::Create();
}
config.audio_processing = apm_;
config.audio_device_module = adm_;
if (audio_frame_processor_) {
config.async_audio_processing_factory =
rtc::make_ref_counted<webrtc::AsyncAudioProcessing::Factory>(
std::move(audio_frame_processor_), *task_queue_factory_);
}
audio_state_ = webrtc::AudioState::Create(config);
}
// Connect the ADM to our audio path.
adm()->RegisterAudioCallback(audio_state()->audio_transport());
// Set default engine options.
{
AudioOptions options;
options.echo_cancellation = true;
options.auto_gain_control = true;
#if defined(WEBRTC_IOS)
// On iOS, VPIO provides built-in NS.
options.noise_suppression = false;
#else
options.noise_suppression = true;
#endif
options.highpass_filter = true;
options.stereo_swapping = false;
options.audio_jitter_buffer_max_packets = 200;
options.audio_jitter_buffer_fast_accelerate = false;
options.audio_jitter_buffer_min_delay_ms = 0;
ApplyOptions(options);
}
initialized_ = true;
}
rtc::scoped_refptr<webrtc::AudioState> WebRtcVoiceEngine::GetAudioState()
const {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
return audio_state_;
}
std::unique_ptr<VoiceMediaSendChannelInterface>
WebRtcVoiceEngine::CreateSendChannel(
webrtc::Call* call,
const MediaConfig& config,
const AudioOptions& options,
const webrtc::CryptoOptions& crypto_options,
webrtc::AudioCodecPairId codec_pair_id) {
return std::make_unique<WebRtcVoiceSendChannel>(
this, config, options, crypto_options, call, codec_pair_id);
}
std::unique_ptr<VoiceMediaReceiveChannelInterface>
WebRtcVoiceEngine::CreateReceiveChannel(
webrtc::Call* call,
const MediaConfig& config,
const AudioOptions& options,
const webrtc::CryptoOptions& crypto_options,
webrtc::AudioCodecPairId codec_pair_id) {
return std::make_unique<WebRtcVoiceReceiveChannel>(
this, config, options, crypto_options, call, codec_pair_id);
}
void WebRtcVoiceEngine::ApplyOptions(const AudioOptions& options_in) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_LOG(LS_INFO) << "WebRtcVoiceEngine::ApplyOptions: "
<< options_in.ToString();
AudioOptions options = options_in; // The options are modified below.
// Set and adjust echo canceller options.
// Use desktop AEC by default, when not using hardware AEC.
bool use_mobile_software_aec = false;
#if defined(WEBRTC_IOS)
if (options.ios_force_software_aec_HACK &&
*options.ios_force_software_aec_HACK) {
// EC may be forced on for a device known to have non-functioning platform
// AEC.
options.echo_cancellation = true;
RTC_LOG(LS_WARNING)
<< "Force software AEC on iOS. May conflict with platform AEC.";
} else {
// On iOS, VPIO provides built-in EC.
options.echo_cancellation = false;
RTC_LOG(LS_INFO) << "Always disable AEC on iOS. Use built-in instead.";
}
#elif defined(WEBRTC_ANDROID)
use_mobile_software_aec = true;
#endif
// Set and adjust gain control options.
#if defined(WEBRTC_IOS)
// On iOS, VPIO provides built-in AGC.
options.auto_gain_control = false;
RTC_LOG(LS_INFO) << "Always disable AGC on iOS. Use built-in instead.";
#endif
#if defined(WEBRTC_IOS) || defined(WEBRTC_ANDROID)
// Turn off the gain control if specified by the field trial.
// The purpose of the field trial is to reduce the amount of resampling
// performed inside the audio processing module on mobile platforms by
// whenever possible turning off the fixed AGC mode and the high-pass filter.
// (https://bugs.chromium.org/p/webrtc/issues/detail?id=6181).
if (minimized_remsampling_on_mobile_trial_enabled_) {
options.auto_gain_control = false;
RTC_LOG(LS_INFO) << "Disable AGC according to field trial.";
if (!(options.noise_suppression.value_or(false) ||
options.echo_cancellation.value_or(false))) {
// If possible, turn off the high-pass filter.
RTC_LOG(LS_INFO)
<< "Disable high-pass filter in response to field trial.";
options.highpass_filter = false;
}
}
#endif
if (options.echo_cancellation) {
// Check if platform supports built-in EC. Currently only supported on
// Android and in combination with Java based audio layer.
// TODO(henrika): investigate possibility to support built-in EC also
// in combination with Open SL ES audio.
const bool built_in_aec = adm()->BuiltInAECIsAvailable();
if (built_in_aec) {
// Built-in EC exists on this device. Enable/Disable it according to the
// echo_cancellation audio option.
const bool enable_built_in_aec = *options.echo_cancellation;
if (adm()->EnableBuiltInAEC(enable_built_in_aec) == 0 &&
enable_built_in_aec) {
// Disable internal software EC if built-in EC is enabled,
// i.e., replace the software EC with the built-in EC.
options.echo_cancellation = false;
RTC_LOG(LS_INFO)
<< "Disabling EC since built-in EC will be used instead";
}
}
}
if (options.auto_gain_control) {
bool built_in_agc_avaliable = adm()->BuiltInAGCIsAvailable();
if (built_in_agc_avaliable) {
if (adm()->EnableBuiltInAGC(*options.auto_gain_control) == 0 &&
*options.auto_gain_control) {
// Disable internal software AGC if built-in AGC is enabled,
// i.e., replace the software AGC with the built-in AGC.
options.auto_gain_control = false;
RTC_LOG(LS_INFO)
<< "Disabling AGC since built-in AGC will be used instead";
}
}
}
if (options.noise_suppression) {
if (adm()->BuiltInNSIsAvailable()) {
bool builtin_ns = *options.noise_suppression;
if (adm()->EnableBuiltInNS(builtin_ns) == 0 && builtin_ns) {
// Disable internal software NS if built-in NS is enabled,
// i.e., replace the software NS with the built-in NS.
options.noise_suppression = false;
RTC_LOG(LS_INFO)
<< "Disabling NS since built-in NS will be used instead";
}
}
}
if (options.stereo_swapping) {
audio_state()->SetStereoChannelSwapping(*options.stereo_swapping);
}
if (options.audio_jitter_buffer_max_packets) {
audio_jitter_buffer_max_packets_ =
std::max(20, *options.audio_jitter_buffer_max_packets);
}
if (options.audio_jitter_buffer_fast_accelerate) {
audio_jitter_buffer_fast_accelerate_ =
*options.audio_jitter_buffer_fast_accelerate;
}
if (options.audio_jitter_buffer_min_delay_ms) {
audio_jitter_buffer_min_delay_ms_ =
*options.audio_jitter_buffer_min_delay_ms;
}
webrtc::AudioProcessing* ap = apm();
if (!ap) {
return;
}
webrtc::AudioProcessing::Config apm_config = ap->GetConfig();
if (options.echo_cancellation) {
apm_config.echo_canceller.enabled = *options.echo_cancellation;
apm_config.echo_canceller.mobile_mode = use_mobile_software_aec;
}
if (options.auto_gain_control) {
const bool enabled = *options.auto_gain_control;
apm_config.gain_controller1.enabled = enabled;
#if defined(WEBRTC_IOS) || defined(WEBRTC_ANDROID)
apm_config.gain_controller1.mode =
apm_config.gain_controller1.kFixedDigital;
#else
apm_config.gain_controller1.mode =
apm_config.gain_controller1.kAdaptiveAnalog;
#endif
}
if (options.highpass_filter) {
apm_config.high_pass_filter.enabled = *options.highpass_filter;
}
if (options.noise_suppression) {
const bool enabled = *options.noise_suppression;
apm_config.noise_suppression.enabled = enabled;
apm_config.noise_suppression.level =
webrtc::AudioProcessing::Config::NoiseSuppression::Level::kHigh;
}
ap->ApplyConfig(apm_config);
}
const std::vector<Codec>& WebRtcVoiceEngine::send_codecs() const {
RTC_DCHECK(signal_thread_checker_.IsCurrent());
return send_codecs_;
}
const std::vector<Codec>& WebRtcVoiceEngine::recv_codecs() const {
RTC_DCHECK(signal_thread_checker_.IsCurrent());
return recv_codecs_;
}
std::vector<webrtc::RtpHeaderExtensionCapability>
WebRtcVoiceEngine::GetRtpHeaderExtensions() const {
RTC_DCHECK(signal_thread_checker_.IsCurrent());
std::vector<webrtc::RtpHeaderExtensionCapability> result;
// id is *not* incremented for non-default extensions, UsedIds needs to
// resolve conflicts.
int id = 1;
for (const auto& uri : {webrtc::RtpExtension::kAudioLevelUri,
webrtc::RtpExtension::kAbsSendTimeUri,
webrtc::RtpExtension::kTransportSequenceNumberUri,
webrtc::RtpExtension::kMidUri}) {
result.emplace_back(uri, id++, webrtc::RtpTransceiverDirection::kSendRecv);
}
for (const auto& uri : {webrtc::RtpExtension::kAbsoluteCaptureTimeUri}) {
result.emplace_back(uri, id, webrtc::RtpTransceiverDirection::kStopped);
}
return result;
}
bool WebRtcVoiceEngine::StartAecDump(webrtc::FileWrapper file,
int64_t max_size_bytes) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
webrtc::AudioProcessing* ap = apm();
if (!ap) {
RTC_LOG(LS_WARNING)
<< "Attempting to start aecdump when no audio processing module is "
"present, hence no aecdump is started.";
return false;
}
return ap->CreateAndAttachAecDump(file.Release(), max_size_bytes,
low_priority_worker_queue_.get());
}
void WebRtcVoiceEngine::StopAecDump() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
webrtc::AudioProcessing* ap = apm();
if (ap) {
ap->DetachAecDump();
} else {
RTC_LOG(LS_WARNING) << "Attempting to stop aecdump when no audio "
"processing module is present";
}
}
std::optional<webrtc::AudioDeviceModule::Stats>
WebRtcVoiceEngine::GetAudioDeviceStats() {
return adm()->GetStats();
}
webrtc::AudioDeviceModule* WebRtcVoiceEngine::adm() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(adm_);
return adm_.get();
}
webrtc::AudioProcessing* WebRtcVoiceEngine::apm() const {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
return apm_.get();
}
webrtc::AudioState* WebRtcVoiceEngine::audio_state() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(audio_state_);
return audio_state_.get();
}
// --------------------------------- WebRtcVoiceSendChannel ------------------
class WebRtcVoiceSendChannel::WebRtcAudioSendStream : public AudioSource::Sink {
public:
WebRtcAudioSendStream(
uint32_t ssrc,
const std::string& mid,
const std::string& c_name,
const std::string track_id,
const std::optional<webrtc::AudioSendStream::Config::SendCodecSpec>&
send_codec_spec,
bool extmap_allow_mixed,
const std::vector<webrtc::RtpExtension>& extensions,
int max_send_bitrate_bps,
int rtcp_report_interval_ms,
const std::optional<std::string>& audio_network_adaptor_config,
webrtc::Call* call,
webrtc::Transport* send_transport,
const rtc::scoped_refptr<webrtc::AudioEncoderFactory>& encoder_factory,
const std::optional<webrtc::AudioCodecPairId> codec_pair_id,
rtc::scoped_refptr<webrtc::FrameEncryptorInterface> frame_encryptor,
const webrtc::CryptoOptions& crypto_options)
: adaptive_ptime_config_(call->trials()),
call_(call),
config_(send_transport),
max_send_bitrate_bps_(max_send_bitrate_bps),
rtp_parameters_(CreateRtpParametersWithOneEncoding()) {
RTC_DCHECK(call);
RTC_DCHECK(encoder_factory);
config_.rtp.ssrc = ssrc;
config_.rtp.mid = mid;
config_.rtp.c_name = c_name;
config_.rtp.extmap_allow_mixed = extmap_allow_mixed;
config_.rtp.extensions = extensions;
config_.has_dscp =
rtp_parameters_.encodings[0].network_priority != webrtc::Priority::kLow;
config_.encoder_factory = encoder_factory;
config_.codec_pair_id = codec_pair_id;
config_.track_id = track_id;
config_.frame_encryptor = frame_encryptor;
config_.crypto_options = crypto_options;
config_.rtcp_report_interval_ms = rtcp_report_interval_ms;
rtp_parameters_.encodings[0].ssrc = ssrc;
rtp_parameters_.rtcp.cname = c_name;
rtp_parameters_.header_extensions = extensions;
audio_network_adaptor_config_from_options_ = audio_network_adaptor_config;
UpdateAudioNetworkAdaptorConfig();
if (send_codec_spec) {
UpdateSendCodecSpec(*send_codec_spec);
}
stream_ = call_->CreateAudioSendStream(config_);
}
WebRtcAudioSendStream() = delete;
WebRtcAudioSendStream(const WebRtcAudioSendStream&) = delete;
WebRtcAudioSendStream& operator=(const WebRtcAudioSendStream&) = delete;
~WebRtcAudioSendStream() override {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
ClearSource();
call_->DestroyAudioSendStream(stream_);
}
void SetSendCodecSpec(
const webrtc::AudioSendStream::Config::SendCodecSpec& send_codec_spec) {
UpdateSendCodecSpec(send_codec_spec);
ReconfigureAudioSendStream(nullptr);
}
void SetRtpExtensions(const std::vector<webrtc::RtpExtension>& extensions) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
config_.rtp.extensions = extensions;
rtp_parameters_.header_extensions = extensions;
ReconfigureAudioSendStream(nullptr);
}
void SetExtmapAllowMixed(bool extmap_allow_mixed) {
config_.rtp.extmap_allow_mixed = extmap_allow_mixed;
ReconfigureAudioSendStream(nullptr);
}
void SetMid(const std::string& mid) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
if (config_.rtp.mid == mid) {
return;
}
config_.rtp.mid = mid;
ReconfigureAudioSendStream(nullptr);
}
void SetRtcpMode(webrtc::RtcpMode mode) {
bool reduced_size = mode == webrtc::RtcpMode::kReducedSize;
if (rtp_parameters_.rtcp.reduced_size == reduced_size) {
return;
}
rtp_parameters_.rtcp.reduced_size = reduced_size;
// Note: this is not wired up beyond this point. For all audio
// RTCP packets sent by a sender there is no difference.
ReconfigureAudioSendStream(nullptr);
}
void SetFrameEncryptor(
rtc::scoped_refptr<webrtc::FrameEncryptorInterface> frame_encryptor) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
config_.frame_encryptor = frame_encryptor;
ReconfigureAudioSendStream(nullptr);
}
void SetAudioNetworkAdaptorConfig(
const std::optional<std::string>& audio_network_adaptor_config) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
if (audio_network_adaptor_config_from_options_ ==
audio_network_adaptor_config) {
return;
}
audio_network_adaptor_config_from_options_ = audio_network_adaptor_config;
UpdateAudioNetworkAdaptorConfig();
UpdateAllowedBitrateRange();
ReconfigureAudioSendStream(nullptr);
}
bool SetMaxSendBitrate(int bps) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(config_.send_codec_spec);
RTC_DCHECK(audio_codec_spec_);
auto send_rate = ComputeSendBitrate(
bps, rtp_parameters_.encodings[0].max_bitrate_bps, *audio_codec_spec_);
if (!send_rate) {
return false;
}
max_send_bitrate_bps_ = bps;
if (send_rate != config_.send_codec_spec->target_bitrate_bps) {
config_.send_codec_spec->target_bitrate_bps = send_rate;
ReconfigureAudioSendStream(nullptr);
}
return true;
}
bool SendTelephoneEvent(int payload_type,
int payload_freq,
int event,
int duration_ms) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(stream_);
return stream_->SendTelephoneEvent(payload_type, payload_freq, event,
duration_ms);
}
void SetSend(bool send) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
send_ = send;
UpdateSendState();
}
void SetMuted(bool muted) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(stream_);
stream_->SetMuted(muted);
muted_ = muted;
}
bool muted() const {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
return muted_;
}
webrtc::AudioSendStream::Stats GetStats(bool has_remote_tracks) const {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(stream_);
return stream_->GetStats(has_remote_tracks);
}
// Starts the sending by setting ourselves as a sink to the AudioSource to
// get data callbacks.
// This method is called on the libjingle worker thread.
// TODO(xians): Make sure Start() is called only once.
void SetSource(AudioSource* source) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(source);
if (source_) {
RTC_DCHECK(source_ == source);
return;
}
source->SetSink(this);
source_ = source;
UpdateSendState();
}
// Stops sending by setting the sink of the AudioSource to nullptr. No data
// callback will be received after this method.
// This method is called on the libjingle worker thread.
void ClearSource() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
if (source_) {
source_->SetSink(nullptr);
source_ = nullptr;
}
UpdateSendState();
}
// AudioSource::Sink implementation.
// This method is called on the audio thread.
void OnData(const void* audio_data,
int bits_per_sample,
int sample_rate,
size_t number_of_channels,
size_t number_of_frames,
std::optional<int64_t> absolute_capture_timestamp_ms) override {
TRACE_EVENT_BEGIN2("webrtc", "WebRtcAudioSendStream::OnData", "sample_rate",
sample_rate, "number_of_frames", number_of_frames);
RTC_DCHECK_EQ(16, bits_per_sample);
RTC_CHECK_RUNS_SERIALIZED(&audio_capture_race_checker_);
RTC_DCHECK(stream_);
std::unique_ptr<webrtc::AudioFrame> audio_frame(new webrtc::AudioFrame());
audio_frame->UpdateFrame(
audio_frame->timestamp_, static_cast<const int16_t*>(audio_data),
number_of_frames, sample_rate, audio_frame->speech_type_,
audio_frame->vad_activity_, number_of_channels);
// TODO(bugs.webrtc.org/10739): add dcheck that
// `absolute_capture_timestamp_ms` always receives a value.
if (absolute_capture_timestamp_ms) {
audio_frame->set_absolute_capture_timestamp_ms(
*absolute_capture_timestamp_ms);
}
stream_->SendAudioData(std::move(audio_frame));
TRACE_EVENT_END1("webrtc", "WebRtcAudioSendStream::OnData",
"number_of_channels", number_of_channels);
}
// Callback from the `source_` when it is going away. In case Start() has
// never been called, this callback won't be triggered.
void OnClose() override {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
// Set `source_` to nullptr to make sure no more callback will get into
// the source.
source_ = nullptr;
UpdateSendState();
}
const webrtc::RtpParameters& rtp_parameters() const {
return rtp_parameters_;
}
webrtc::RTCError SetRtpParameters(const webrtc::RtpParameters& parameters,
webrtc::SetParametersCallback callback) {
webrtc::RTCError error = CheckRtpParametersInvalidModificationAndValues(
rtp_parameters_, parameters, call_->trials());
if (!error.ok()) {
return webrtc::InvokeSetParametersCallback(callback, error);
}
std::optional<int> send_rate;
if (audio_codec_spec_) {
send_rate = ComputeSendBitrate(max_send_bitrate_bps_,
parameters.encodings[0].max_bitrate_bps,
*audio_codec_spec_);
if (!send_rate) {
return webrtc::InvokeSetParametersCallback(
callback, webrtc::RTCError(webrtc::RTCErrorType::INTERNAL_ERROR));
}
}
const std::optional<int> old_rtp_max_bitrate =
rtp_parameters_.encodings[0].max_bitrate_bps;
double old_priority = rtp_parameters_.encodings[0].bitrate_priority;
webrtc::Priority old_dscp = rtp_parameters_.encodings[0].network_priority;
bool old_adaptive_ptime = rtp_parameters_.encodings[0].adaptive_ptime;
rtp_parameters_ = parameters;
config_.bitrate_priority = rtp_parameters_.encodings[0].bitrate_priority;
config_.has_dscp = (rtp_parameters_.encodings[0].network_priority !=
webrtc::Priority::kLow);
bool reconfigure_send_stream =
(rtp_parameters_.encodings[0].max_bitrate_bps != old_rtp_max_bitrate) ||
(rtp_parameters_.encodings[0].bitrate_priority != old_priority) ||
(rtp_parameters_.encodings[0].network_priority != old_dscp) ||
(rtp_parameters_.encodings[0].adaptive_ptime != old_adaptive_ptime);
if (rtp_parameters_.encodings[0].max_bitrate_bps != old_rtp_max_bitrate) {
// Update the bitrate range.
if (send_rate) {
config_.send_codec_spec->target_bitrate_bps = send_rate;
}
}
if (reconfigure_send_stream) {
// Changing adaptive_ptime may update the audio network adaptor config
// used.
UpdateAudioNetworkAdaptorConfig();
UpdateAllowedBitrateRange();
ReconfigureAudioSendStream(std::move(callback));
} else {
webrtc::InvokeSetParametersCallback(callback, webrtc::RTCError::OK());
}
rtp_parameters_.rtcp.cname = config_.rtp.c_name;
rtp_parameters_.rtcp.reduced_size =
config_.rtp.rtcp_mode == webrtc::RtcpMode::kReducedSize;
// parameters.encodings[0].active could have changed.
UpdateSendState();
return webrtc::RTCError::OK();
}
void SetEncoderToPacketizerFrameTransformer(
rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
config_.frame_transformer = std::move(frame_transformer);
ReconfigureAudioSendStream(nullptr);
}
private:
void UpdateSendState() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(stream_);
RTC_DCHECK_EQ(1UL, rtp_parameters_.encodings.size());
// Stream can be started without |source_| being set.
if (send_ && rtp_parameters_.encodings[0].active) {
stream_->Start();
} else {
stream_->Stop();
}
}
void UpdateAllowedBitrateRange() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
// The order of precedence, from lowest to highest is:
// - a reasonable default of 32kbps min/max
// - fixed target bitrate from codec spec
// - lower min bitrate if adaptive ptime is enabled
const int kDefaultBitrateBps = 32000;
config_.min_bitrate_bps = kDefaultBitrateBps;
config_.max_bitrate_bps = kDefaultBitrateBps;
if (config_.send_codec_spec &&
config_.send_codec_spec->target_bitrate_bps) {
config_.min_bitrate_bps = *config_.send_codec_spec->target_bitrate_bps;
config_.max_bitrate_bps = *config_.send_codec_spec->target_bitrate_bps;
}
if (rtp_parameters_.encodings[0].adaptive_ptime) {
config_.min_bitrate_bps = std::min(
config_.min_bitrate_bps,
static_cast<int>(adaptive_ptime_config_.min_encoder_bitrate.bps()));
}
}
void UpdateSendCodecSpec(
const webrtc::AudioSendStream::Config::SendCodecSpec& send_codec_spec) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
config_.send_codec_spec = send_codec_spec;
auto info =
config_.encoder_factory->QueryAudioEncoder(send_codec_spec.format);
RTC_DCHECK(info);
// If a specific target bitrate has been set for the stream, use that as
// the new default bitrate when computing send bitrate.
if (send_codec_spec.target_bitrate_bps) {
info->default_bitrate_bps = std::max(
info->min_bitrate_bps,
std::min(info->max_bitrate_bps, *send_codec_spec.target_bitrate_bps));
}
audio_codec_spec_.emplace(
webrtc::AudioCodecSpec{send_codec_spec.format, *info});
config_.send_codec_spec->target_bitrate_bps = ComputeSendBitrate(
max_send_bitrate_bps_, rtp_parameters_.encodings[0].max_bitrate_bps,
*audio_codec_spec_);
UpdateAllowedBitrateRange();
// Encoder will only use two channels if the stereo parameter is set.
const auto& it = send_codec_spec.format.parameters.find("stereo");
if (it != send_codec_spec.format.parameters.end() && it->second == "1") {
num_encoded_channels_ = 2;
} else {
num_encoded_channels_ = 1;
}
}
void UpdateAudioNetworkAdaptorConfig() {
if (adaptive_ptime_config_.enabled ||
rtp_parameters_.encodings[0].adaptive_ptime) {
config_.audio_network_adaptor_config =
adaptive_ptime_config_.audio_network_adaptor_config;
return;
}
config_.audio_network_adaptor_config =
audio_network_adaptor_config_from_options_;
}
void ReconfigureAudioSendStream(webrtc::SetParametersCallback callback) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
RTC_DCHECK(stream_);
stream_->Reconfigure(config_, std::move(callback));
}
int NumPreferredChannels() const override { return num_encoded_channels_; }
const AdaptivePtimeConfig adaptive_ptime_config_;
webrtc::SequenceChecker worker_thread_checker_;
rtc::RaceChecker audio_capture_race_checker_;
webrtc::Call* call_ = nullptr;
webrtc::AudioSendStream::Config config_;
// The stream is owned by WebRtcAudioSendStream and may be reallocated if
// configuration changes.
webrtc::AudioSendStream* stream_ = nullptr;
// Raw pointer to AudioSource owned by LocalAudioTrackHandler.
// PeerConnection will make sure invalidating the pointer before the object
// goes away.
AudioSource* source_ = nullptr;
bool send_ = false;
bool muted_ = false;
int max_send_bitrate_bps_;
webrtc::RtpParameters rtp_parameters_;
std::optional<webrtc::AudioCodecSpec> audio_codec_spec_;
// TODO(webrtc:11717): Remove this once audio_network_adaptor in AudioOptions
// has been removed.
std::optional<std::string> audio_network_adaptor_config_from_options_;
std::atomic<int> num_encoded_channels_{-1};
};
WebRtcVoiceSendChannel::WebRtcVoiceSendChannel(
WebRtcVoiceEngine* engine,
const MediaConfig& config,
const AudioOptions& options,
const webrtc::CryptoOptions& crypto_options,
webrtc::Call* call,
webrtc::AudioCodecPairId codec_pair_id)
: MediaChannelUtil(call->network_thread(), config.enable_dscp),
worker_thread_(call->worker_thread()),
engine_(engine),
call_(call),
audio_config_(config.audio),
codec_pair_id_(codec_pair_id),
crypto_options_(crypto_options) {
RTC_LOG(LS_VERBOSE) << "WebRtcVoiceSendChannel::WebRtcVoiceSendChannel";
RTC_DCHECK(call);
SetOptions(options);
}
WebRtcVoiceSendChannel::~WebRtcVoiceSendChannel() {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_DLOG(LS_VERBOSE) << "WebRtcVoiceSendChannel::~WebRtcVoiceSendChannel";
// TODO(solenberg): Should be able to delete the streams directly, without
// going through RemoveNnStream(), once stream objects handle
// all (de)configuration.
while (!send_streams_.empty()) {
RemoveSendStream(send_streams_.begin()->first);
}
}
bool WebRtcVoiceSendChannel::SetOptions(const AudioOptions& options) {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "Setting voice channel options: " << options.ToString();
// We retain all of the existing options, and apply the given ones
// on top. This means there is no way to "clear" options such that
// they go back to the engine default.
options_.SetAll(options);
engine()->ApplyOptions(options_);
std::optional<std::string> audio_network_adaptor_config =
GetAudioNetworkAdaptorConfig(options_);
for (auto& it : send_streams_) {
it.second->SetAudioNetworkAdaptorConfig(audio_network_adaptor_config);
}
RTC_LOG(LS_INFO) << "Set voice send channel options. Current options: "
<< options_.ToString();
return true;
}
bool WebRtcVoiceSendChannel::SetSenderParameters(
const AudioSenderParameter& params) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::SetSenderParameters");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "WebRtcVoiceMediaChannel::SetSenderParameters: "
<< params.ToString();
// TODO(pthatcher): Refactor this to be more clean now that we have
// all the information at once.
// Finding if the RtpParameters force a specific codec
std::optional<Codec> force_codec;
if (send_streams_.size() == 1) {
// Since audio simulcast is not supported, currently, only PlanB
// has multiple tracks and we don't care about getting the
// functionality working there properly.
auto rtp_parameters = send_streams_.begin()->second->rtp_parameters();
if (rtp_parameters.encodings[0].codec) {
auto matched_codec =
absl::c_find_if(params.codecs, [&](auto negotiated_codec) {
return negotiated_codec.MatchesRtpCodec(
*rtp_parameters.encodings[0].codec);
});
if (matched_codec != params.codecs.end()) {
force_codec = *matched_codec;
} else {
// The requested codec has been negotiated away, we clear it from the
// parameters.
for (auto& encoding : rtp_parameters.encodings) {
encoding.codec.reset();
}
send_streams_.begin()->second->SetRtpParameters(rtp_parameters,
nullptr);
}
}
}
if (!SetSendCodecs(params.codecs, force_codec)) {
return false;
}
if (!ValidateRtpExtensions(params.extensions, send_rtp_extensions_)) {
return false;
}
if (ExtmapAllowMixed() != params.extmap_allow_mixed) {
SetExtmapAllowMixed(params.extmap_allow_mixed);
for (auto& it : send_streams_) {
it.second->SetExtmapAllowMixed(params.extmap_allow_mixed);
}
}
std::vector<webrtc::RtpExtension> filtered_extensions = FilterRtpExtensions(
params.extensions, webrtc::RtpExtension::IsSupportedForAudio, true,
call_->trials());
if (send_rtp_extensions_ != filtered_extensions) {
send_rtp_extensions_.swap(filtered_extensions);
for (auto& it : send_streams_) {
it.second->SetRtpExtensions(send_rtp_extensions_);
}
}
if (!params.mid.empty()) {
mid_ = params.mid;
for (auto& it : send_streams_) {
it.second->SetMid(params.mid);
}
}
if (send_codec_spec_ && !SetMaxSendBitrate(params.max_bandwidth_bps)) {
return false;
}
rtcp_mode_ = params.rtcp.reduced_size ? webrtc::RtcpMode::kReducedSize
: webrtc::RtcpMode::kCompound;
for (auto& it : send_streams_) {
it.second->SetRtcpMode(rtcp_mode_);
}
return SetOptions(params.options);
}
std::optional<Codec> WebRtcVoiceSendChannel::GetSendCodec() const {
if (send_codec_spec_) {
return CreateAudioCodec(send_codec_spec_->format);
}
return std::nullopt;
}
// Utility function called from SetSenderParameters() to extract current send
// codec settings from the given list of codecs (originally from SDP). Both send
// and receive streams may be reconfigured based on the new settings.
bool WebRtcVoiceSendChannel::SetSendCodecs(
const std::vector<Codec>& codecs,
std::optional<Codec> preferred_codec) {
RTC_DCHECK_RUN_ON(worker_thread_);
dtmf_payload_type_ = std::nullopt;
dtmf_payload_freq_ = -1;
// Validate supplied codecs list.
for (const Codec& codec : codecs) {
// TODO(solenberg): Validate more aspects of input - that payload types
// don't overlap, remove redundant/unsupported codecs etc -
// the same way it is done for RtpHeaderExtensions.
if (codec.id < kMinPayloadType || codec.id > kMaxPayloadType) {
RTC_LOG(LS_WARNING) << "Codec payload type out of range: "
<< ToString(codec);
return false;
}
}
// Find PT of telephone-event codec with lowest clockrate, as a fallback, in
// case we don't have a DTMF codec with a rate matching the send codec's, or
// if this function returns early.
std::vector<Codec> dtmf_codecs;
for (const Codec& codec : codecs) {
if (IsCodec(codec, kDtmfCodecName)) {
dtmf_codecs.push_back(codec);
if (!dtmf_payload_type_ || codec.clockrate < dtmf_payload_freq_) {
dtmf_payload_type_ = codec.id;
dtmf_payload_freq_ = codec.clockrate;
}
}
}
// Scan through the list to figure out the codec to use for sending.
std::optional<webrtc::AudioSendStream::Config::SendCodecSpec> send_codec_spec;
webrtc::BitrateConstraints bitrate_config;
std::optional<webrtc::AudioCodecInfo> voice_codec_info;
size_t send_codec_position = 0;
for (const Codec& voice_codec : codecs) {
if (!(IsCodec(voice_codec, kCnCodecName) ||
IsCodec(voice_codec, kDtmfCodecName) ||
IsCodec(voice_codec, kRedCodecName)) &&
(!preferred_codec || preferred_codec->Matches(voice_codec))) {
webrtc::SdpAudioFormat format(voice_codec.name, voice_codec.clockrate,
voice_codec.channels, voice_codec.params);
voice_codec_info = engine()->encoder_factory_->QueryAudioEncoder(format);
if (!voice_codec_info) {
RTC_LOG(LS_WARNING) << "Unknown codec " << ToString(voice_codec);
continue;
}
send_codec_spec = webrtc::AudioSendStream::Config::SendCodecSpec(
voice_codec.id, format);
if (voice_codec.bitrate > 0) {
send_codec_spec->target_bitrate_bps = voice_codec.bitrate;
}
send_codec_spec->nack_enabled = HasNack(voice_codec);
send_codec_spec->enable_non_sender_rtt = HasRrtr(voice_codec);
bitrate_config = GetBitrateConfigForCodec(voice_codec);
break;
}
send_codec_position++;
}
if (!send_codec_spec) {
// No codecs in common, bail out early.
return true;
}
RTC_DCHECK(voice_codec_info);
if (voice_codec_info->allow_comfort_noise) {
// Loop through the codecs list again to find the CN codec.
// TODO(solenberg): Break out into a separate function?
for (const Codec& cn_codec : codecs) {
if (IsCodec(cn_codec, kCnCodecName) &&
cn_codec.clockrate == send_codec_spec->format.clockrate_hz &&
cn_codec.channels == voice_codec_info->num_channels) {
if (cn_codec.channels != 1) {
RTC_LOG(LS_WARNING)
<< "CN #channels " << cn_codec.channels << " not supported.";
} else if (cn_codec.clockrate != 8000 && cn_codec.clockrate != 16000 &&
cn_codec.clockrate != 32000) {
RTC_LOG(LS_WARNING)
<< "CN frequency " << cn_codec.clockrate << " not supported.";
} else {
send_codec_spec->cng_payload_type = cn_codec.id;
}
break;
}
}
// Find the telephone-event PT exactly matching the preferred send codec.
for (const Codec& dtmf_codec : dtmf_codecs) {
if (dtmf_codec.clockrate == send_codec_spec->format.clockrate_hz) {
dtmf_payload_type_ = dtmf_codec.id;
dtmf_payload_freq_ = dtmf_codec.clockrate;
break;
}
}
}
// Loop through the codecs to find the RED codec that matches opus
// with respect to clockrate and number of channels.
// RED codec needs to be negotiated before the actual codec they
// reference.
for (size_t i = 0; i < send_codec_position; ++i) {
const Codec& red_codec = codecs[i];
if (IsCodec(red_codec, kRedCodecName) &&
CheckRedParameters(red_codec, *send_codec_spec)) {
send_codec_spec->red_payload_type = red_codec.id;
break;
}
}
if (send_codec_spec_ != send_codec_spec) {
send_codec_spec_ = std::move(send_codec_spec);
// Apply new settings to all streams.
for (const auto& kv : send_streams_) {
kv.second->SetSendCodecSpec(*send_codec_spec_);
}
} else {
// If the codec isn't changing, set the start bitrate to -1 which means
// "unchanged" so that BWE isn't affected.
bitrate_config.start_bitrate_bps = -1;
}
call_->GetTransportControllerSend()->SetSdpBitrateParameters(bitrate_config);
send_codecs_ = codecs;
if (send_codec_changed_callback_) {
send_codec_changed_callback_();
}
return true;
}
void WebRtcVoiceSendChannel::SetSend(bool send) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::SetSend");
if (send_ == send) {
return;
}
// Apply channel specific options.
if (send) {
engine()->ApplyOptions(options_);
// Initialize the ADM for recording (this may take time on some platforms,
// e.g. Android).
if (options_.init_recording_on_send.value_or(true) &&
// InitRecording() may return an error if the ADM is already recording.
!engine()->adm()->RecordingIsInitialized() &&
!engine()->adm()->Recording()) {
if (engine()->adm()->InitRecording() != 0) {
RTC_LOG(LS_WARNING) << "Failed to initialize recording";
}
}
}
// Change the settings on each send channel.
for (auto& kv : send_streams_) {
kv.second->SetSend(send);
}
send_ = send;
}
bool WebRtcVoiceSendChannel::SetAudioSend(uint32_t ssrc,
bool enable,
const AudioOptions* options,
AudioSource* source) {
RTC_DCHECK_RUN_ON(worker_thread_);
// TODO(solenberg): The state change should be fully rolled back if any one of
// these calls fail.
if (!SetLocalSource(ssrc, source)) {
return false;
}
if (!MuteStream(ssrc, !enable)) {
return false;
}
if (enable && options) {
return SetOptions(*options);
}
return true;
}
bool WebRtcVoiceSendChannel::AddSendStream(const StreamParams& sp) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::AddSendStream");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "AddSendStream: " << sp.ToString();
uint32_t ssrc = sp.first_ssrc();
RTC_DCHECK(0 != ssrc);
if (send_streams_.find(ssrc) != send_streams_.end()) {
RTC_LOG(LS_ERROR) << "Stream already exists with ssrc " << ssrc;
return false;
}
std::optional<std::string> audio_network_adaptor_config =
GetAudioNetworkAdaptorConfig(options_);
WebRtcAudioSendStream* stream = new WebRtcAudioSendStream(
ssrc, mid_, sp.cname, sp.id, send_codec_spec_, ExtmapAllowMixed(),
send_rtp_extensions_, max_send_bitrate_bps_,
audio_config_.rtcp_report_interval_ms, audio_network_adaptor_config,
call_, transport(), engine()->encoder_factory_, codec_pair_id_, nullptr,
crypto_options_);
send_streams_.insert(std::make_pair(ssrc, stream));
if (ssrc_list_changed_callback_) {
std::set<uint32_t> ssrcs_in_use;
for (auto it : send_streams_) {
ssrcs_in_use.insert(it.first);
}
ssrc_list_changed_callback_(ssrcs_in_use);
}
send_streams_[ssrc]->SetSend(send_);
return true;
}
bool WebRtcVoiceSendChannel::RemoveSendStream(uint32_t ssrc) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::RemoveSendStream");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "RemoveSendStream: " << ssrc;
auto it = send_streams_.find(ssrc);
if (it == send_streams_.end()) {
RTC_LOG(LS_WARNING) << "Try to remove stream with ssrc " << ssrc
<< " which doesn't exist.";
return false;
}
it->second->SetSend(false);
// TODO(solenberg): If we're removing the receiver_reports_ssrc_ stream, find
// the first active send stream and use that instead, reassociating receive
// streams.
delete it->second;
send_streams_.erase(it);
if (send_streams_.empty()) {
SetSend(false);
}
return true;
}
void WebRtcVoiceSendChannel::SetSsrcListChangedCallback(
absl::AnyInvocable<void(const std::set<uint32_t>&)> callback) {
ssrc_list_changed_callback_ = std::move(callback);
}
bool WebRtcVoiceSendChannel::SetLocalSource(uint32_t ssrc,
AudioSource* source) {
auto it = send_streams_.find(ssrc);
if (it == send_streams_.end()) {
if (source) {
// Return an error if trying to set a valid source with an invalid ssrc.
RTC_LOG(LS_ERROR) << "SetLocalSource failed with ssrc " << ssrc;
return false;
}
// The channel likely has gone away, do nothing.
return true;
}
if (source) {
it->second->SetSource(source);
} else {
it->second->ClearSource();
}
return true;
}
bool WebRtcVoiceSendChannel::CanInsertDtmf() {
return dtmf_payload_type_.has_value() && send_;
}
void WebRtcVoiceSendChannel::SetFrameEncryptor(
uint32_t ssrc,
rtc::scoped_refptr<webrtc::FrameEncryptorInterface> frame_encryptor) {
RTC_DCHECK_RUN_ON(worker_thread_);
auto matching_stream = send_streams_.find(ssrc);
if (matching_stream != send_streams_.end()) {
matching_stream->second->SetFrameEncryptor(frame_encryptor);
}
}
bool WebRtcVoiceSendChannel::InsertDtmf(uint32_t ssrc,
int event,
int duration) {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "WebRtcVoiceMediaChannel::InsertDtmf";
if (!CanInsertDtmf()) {
return false;
}
// Figure out which WebRtcAudioSendStream to send the event on.
auto it = ssrc != 0 ? send_streams_.find(ssrc) : send_streams_.begin();
if (it == send_streams_.end()) {
RTC_LOG(LS_WARNING) << "The specified ssrc " << ssrc << " is not in use.";
return false;
}
if (event < kMinTelephoneEventCode || event > kMaxTelephoneEventCode) {
RTC_LOG(LS_WARNING) << "DTMF event code " << event << " out of range.";
return false;
}
RTC_DCHECK_NE(-1, dtmf_payload_freq_);
return it->second->SendTelephoneEvent(*dtmf_payload_type_, dtmf_payload_freq_,
event, duration);
}
void WebRtcVoiceSendChannel::OnPacketSent(const rtc::SentPacket& sent_packet) {
RTC_DCHECK_RUN_ON(&network_thread_checker_);
// TODO(tommi): We shouldn't need to go through call_ to deliver this
// notification. We should already have direct access to
// video_send_delay_stats_ and transport_send_ptr_ via `stream_`.
// So we should be able to remove OnSentPacket from Call and handle this per
// channel instead. At the moment Call::OnSentPacket calls OnSentPacket for
// the video stats, which we should be able to skip.
call_->OnSentPacket(sent_packet);
}
void WebRtcVoiceSendChannel::OnNetworkRouteChanged(
absl::string_view transport_name,
const rtc::NetworkRoute& network_route) {
RTC_DCHECK_RUN_ON(&network_thread_checker_);
call_->OnAudioTransportOverheadChanged(network_route.packet_overhead);
worker_thread_->PostTask(SafeTask(
task_safety_.flag(),
[this, name = std::string(transport_name), route = network_route] {
RTC_DCHECK_RUN_ON(worker_thread_);
call_->GetTransportControllerSend()->OnNetworkRouteChanged(name, route);
}));
}
bool WebRtcVoiceSendChannel::MuteStream(uint32_t ssrc, bool muted) {
RTC_DCHECK_RUN_ON(worker_thread_);
const auto it = send_streams_.find(ssrc);
if (it == send_streams_.end()) {
RTC_LOG(LS_WARNING) << "The specified ssrc " << ssrc << " is not in use.";
return false;
}
it->second->SetMuted(muted);
// TODO(solenberg):
// We set the AGC to mute state only when all the channels are muted.
// This implementation is not ideal, instead we should signal the AGC when
// the mic channel is muted/unmuted. We can't do it today because there
// is no good way to know which stream is mapping to the mic channel.
bool all_muted = muted;
for (const auto& kv : send_streams_) {
all_muted = all_muted && kv.second->muted();
}
webrtc::AudioProcessing* ap = engine()->apm();
if (ap) {
ap->set_output_will_be_muted(all_muted);
}
return true;
}
bool WebRtcVoiceSendChannel::SetMaxSendBitrate(int bps) {
RTC_LOG(LS_INFO) << "WebRtcVoiceMediaChannel::SetMaxSendBitrate.";
max_send_bitrate_bps_ = bps;
bool success = true;
for (const auto& kv : send_streams_) {
if (!kv.second->SetMaxSendBitrate(max_send_bitrate_bps_)) {
success = false;
}
}
return success;
}
void WebRtcVoiceSendChannel::OnReadyToSend(bool ready) {
RTC_DCHECK_RUN_ON(&network_thread_checker_);
RTC_LOG(LS_VERBOSE) << "OnReadyToSend: " << (ready ? "Ready." : "Not ready.");
call_->SignalChannelNetworkState(
webrtc::MediaType::AUDIO,
ready ? webrtc::kNetworkUp : webrtc::kNetworkDown);
}
bool WebRtcVoiceSendChannel::GetStats(VoiceMediaSendInfo* info) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::GetSendStats");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_DCHECK(info);
// Get SSRC and stats for each sender.
// With separate send and receive channels, we expect GetStats to be called on
// both, and accumulate info, but only one channel (the send one) should have
// senders.
RTC_DCHECK(info->senders.size() == 0U || send_streams_.size() == 0);
for (const auto& stream : send_streams_) {
webrtc::AudioSendStream::Stats stats = stream.second->GetStats(false);
VoiceSenderInfo sinfo;
sinfo.add_ssrc(stats.local_ssrc);
sinfo.payload_bytes_sent = stats.payload_bytes_sent;
sinfo.header_and_padding_bytes_sent = stats.header_and_padding_bytes_sent;
sinfo.retransmitted_bytes_sent = stats.retransmitted_bytes_sent;
sinfo.packets_sent = stats.packets_sent;
sinfo.total_packet_send_delay = stats.total_packet_send_delay;
sinfo.retransmitted_packets_sent = stats.retransmitted_packets_sent;
sinfo.packets_lost = stats.packets_lost;
sinfo.fraction_lost = stats.fraction_lost;
sinfo.nacks_received = stats.nacks_received;
sinfo.target_bitrate = stats.target_bitrate_bps;
sinfo.codec_name = stats.codec_name;
sinfo.codec_payload_type = stats.codec_payload_type;
sinfo.jitter_ms = stats.jitter_ms;
sinfo.rtt_ms = stats.rtt_ms;
sinfo.audio_level = stats.audio_level;
sinfo.total_input_energy = stats.total_input_energy;
sinfo.total_input_duration = stats.total_input_duration;
sinfo.ana_statistics = stats.ana_statistics;
sinfo.apm_statistics = stats.apm_statistics;
sinfo.report_block_datas = std::move(stats.report_block_datas);
auto encodings = stream.second->rtp_parameters().encodings;
if (!encodings.empty()) {
sinfo.active = encodings[0].active;
}
info->senders.push_back(sinfo);
}
FillSendCodecStats(info);
return true;
}
void WebRtcVoiceSendChannel::FillSendCodecStats(
VoiceMediaSendInfo* voice_media_info) {
for (const auto& sender : voice_media_info->senders) {
auto codec = absl::c_find_if(send_codecs_, [&sender](const Codec& c) {
return sender.codec_payload_type && *sender.codec_payload_type == c.id;
});
if (codec != send_codecs_.end()) {
voice_media_info->send_codecs.insert(
std::make_pair(codec->id, codec->ToCodecParameters()));
}
}
}
void WebRtcVoiceSendChannel::SetEncoderToPacketizerFrameTransformer(
uint32_t ssrc,
rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
RTC_DCHECK_RUN_ON(worker_thread_);
auto matching_stream = send_streams_.find(ssrc);
if (matching_stream == send_streams_.end()) {
RTC_LOG(LS_INFO) << "Attempting to set frame transformer for SSRC:" << ssrc
<< " which doesn't exist.";
return;
}
matching_stream->second->SetEncoderToPacketizerFrameTransformer(
std::move(frame_transformer));
}
webrtc::RtpParameters WebRtcVoiceSendChannel::GetRtpSendParameters(
uint32_t ssrc) const {
RTC_DCHECK_RUN_ON(worker_thread_);
auto it = send_streams_.find(ssrc);
if (it == send_streams_.end()) {
RTC_LOG(LS_WARNING) << "Attempting to get RTP send parameters for stream "
"with ssrc "
<< ssrc << " which doesn't exist.";
return webrtc::RtpParameters();
}
webrtc::RtpParameters rtp_params = it->second->rtp_parameters();
// Need to add the common list of codecs to the send stream-specific
// RTP parameters.
for (const Codec& codec : send_codecs_) {
rtp_params.codecs.push_back(codec.ToCodecParameters());
}
return rtp_params;
}
webrtc::RTCError WebRtcVoiceSendChannel::SetRtpSendParameters(
uint32_t ssrc,
const webrtc::RtpParameters& parameters,
webrtc::SetParametersCallback callback) {
RTC_DCHECK_RUN_ON(worker_thread_);
auto it = send_streams_.find(ssrc);
if (it == send_streams_.end()) {
RTC_LOG(LS_WARNING) << "Attempting to set RTP send parameters for stream "
"with ssrc "
<< ssrc << " which doesn't exist.";
return webrtc::InvokeSetParametersCallback(
callback, webrtc::RTCError(webrtc::RTCErrorType::INTERNAL_ERROR));
}
// TODO(deadbeef): Handle setting parameters with a list of codecs in a
// different order (which should change the send codec).
webrtc::RtpParameters current_parameters = GetRtpSendParameters(ssrc);
if (current_parameters.codecs != parameters.codecs) {
RTC_DLOG(LS_ERROR) << "Using SetParameters to change the set of codecs "
"is not currently supported.";
return webrtc::InvokeSetParametersCallback(
callback, webrtc::RTCError(webrtc::RTCErrorType::INTERNAL_ERROR));
}
if (!parameters.encodings.empty()) {
// Note that these values come from:
// https://tools.ietf.org/html/draft-ietf-tsvwg-rtcweb-qos-16#section-5
rtc::DiffServCodePoint new_dscp = rtc::DSCP_DEFAULT;
switch (parameters.encodings[0].network_priority) {
case webrtc::Priority::kVeryLow:
new_dscp = rtc::DSCP_CS1;
break;
case webrtc::Priority::kLow:
new_dscp = rtc::DSCP_DEFAULT;
break;
case webrtc::Priority::kMedium:
new_dscp = rtc::DSCP_EF;
break;
case webrtc::Priority::kHigh:
new_dscp = rtc::DSCP_EF;
break;
}
SetPreferredDscp(new_dscp);
std::optional<cricket::Codec> send_codec = GetSendCodec();
// Since we validate that all layers have the same value, we can just check
// the first layer.
// TODO(orphis): Support mixed-codec simulcast
if (parameters.encodings[0].codec && send_codec &&
!send_codec->MatchesRtpCodec(*parameters.encodings[0].codec)) {
RTC_LOG(LS_VERBOSE) << "Trying to change codec to "
<< parameters.encodings[0].codec->name;
auto matched_codec =
absl::c_find_if(send_codecs_, [&](auto negotiated_codec) {
return negotiated_codec.MatchesRtpCodec(
*parameters.encodings[0].codec);
});
if (matched_codec == send_codecs_.end()) {
return webrtc::InvokeSetParametersCallback(
callback, webrtc::RTCError(
webrtc::RTCErrorType::INVALID_MODIFICATION,
"Attempted to use an unsupported codec for layer 0"));
}
SetSendCodecs(send_codecs_, *matched_codec);
}
}
// TODO(minyue): The following legacy actions go into
// `WebRtcAudioSendStream::SetRtpParameters()` which is called at the end,
// though there are two difference:
// 1. `WebRtcVoiceMediaChannel::SetChannelSendParameters()` only calls
// `SetSendCodec` while `WebRtcAudioSendStream::SetRtpParameters()` calls
// `SetSendCodecs`. The outcome should be the same.
// 2. AudioSendStream can be recreated.
// Codecs are handled at the WebRtcVoiceMediaChannel level.
webrtc::RtpParameters reduced_params = parameters;
reduced_params.codecs.clear();
return it->second->SetRtpParameters(reduced_params, std::move(callback));
}
// -------------------------- WebRtcVoiceReceiveChannel ----------------------
class WebRtcVoiceReceiveChannel::WebRtcAudioReceiveStream {
public:
WebRtcAudioReceiveStream(webrtc::AudioReceiveStreamInterface::Config config,
webrtc::Call* call)
: call_(call), stream_(call_->CreateAudioReceiveStream(config)) {
RTC_DCHECK(call);
RTC_DCHECK(stream_);
}
WebRtcAudioReceiveStream() = delete;
WebRtcAudioReceiveStream(const WebRtcAudioReceiveStream&) = delete;
WebRtcAudioReceiveStream& operator=(const WebRtcAudioReceiveStream&) = delete;
~WebRtcAudioReceiveStream() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
call_->DestroyAudioReceiveStream(stream_);
}
webrtc::AudioReceiveStreamInterface& stream() {
RTC_DCHECK(stream_);
return *stream_;
}
void SetFrameDecryptor(
rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
stream_->SetFrameDecryptor(std::move(frame_decryptor));
}
void SetUseNack(bool use_nack) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
stream_->SetNackHistory(use_nack ? kNackRtpHistoryMs : 0);
}
void SetRtcpMode(webrtc::RtcpMode mode) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
stream_->SetRtcpMode(mode);
}
void SetNonSenderRttMeasurement(bool enabled) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
stream_->SetNonSenderRttMeasurement(enabled);
}
// Set a new payload type -> decoder map.
void SetDecoderMap(const std::map<int, webrtc::SdpAudioFormat>& decoder_map) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
stream_->SetDecoderMap(decoder_map);
}
webrtc::AudioReceiveStreamInterface::Stats GetStats(
bool get_and_clear_legacy_stats) const {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
return stream_->GetStats(get_and_clear_legacy_stats);
}
void SetRawAudioSink(std::unique_ptr<webrtc::AudioSinkInterface> sink) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
// Need to update the stream's sink first; once raw_audio_sink_ is
// reassigned, whatever was in there before is destroyed.
stream_->SetSink(sink.get());
raw_audio_sink_ = std::move(sink);
}
void SetOutputVolume(double volume) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
stream_->SetGain(volume);
}
void SetPlayout(bool playout) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
if (playout) {
stream_->Start();
} else {
stream_->Stop();
}
}
bool SetBaseMinimumPlayoutDelayMs(int delay_ms) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
if (stream_->SetBaseMinimumPlayoutDelayMs(delay_ms))
return true;
RTC_LOG(LS_ERROR) << "Failed to SetBaseMinimumPlayoutDelayMs"
" on AudioReceiveStreamInterface on SSRC="
<< stream_->remote_ssrc()
<< " with delay_ms=" << delay_ms;
return false;
}
int GetBaseMinimumPlayoutDelayMs() const {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
return stream_->GetBaseMinimumPlayoutDelayMs();
}
std::vector<webrtc::RtpSource> GetSources() {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
return stream_->GetSources();
}
void SetDepacketizerToDecoderFrameTransformer(
rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
RTC_DCHECK_RUN_ON(&worker_thread_checker_);
stream_->SetDepacketizerToDecoderFrameTransformer(frame_transformer);
}
private:
webrtc::SequenceChecker worker_thread_checker_;
webrtc::Call* call_ = nullptr;
webrtc::AudioReceiveStreamInterface* const stream_ = nullptr;
std::unique_ptr<webrtc::AudioSinkInterface> raw_audio_sink_
RTC_GUARDED_BY(worker_thread_checker_);
};
WebRtcVoiceReceiveChannel::WebRtcVoiceReceiveChannel(
WebRtcVoiceEngine* engine,
const MediaConfig& config,
const AudioOptions& options,
const webrtc::CryptoOptions& crypto_options,
webrtc::Call* call,
webrtc::AudioCodecPairId codec_pair_id)
: MediaChannelUtil(call->network_thread(), config.enable_dscp),
worker_thread_(call->worker_thread()),
engine_(engine),
call_(call),
audio_config_(config.audio),
codec_pair_id_(codec_pair_id),
crypto_options_(crypto_options) {
RTC_LOG(LS_VERBOSE) << "WebRtcVoiceReceiveChannel::WebRtcVoiceReceiveChannel";
RTC_DCHECK(call);
SetOptions(options);
}
WebRtcVoiceReceiveChannel::~WebRtcVoiceReceiveChannel() {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_DLOG(LS_VERBOSE)
<< "WebRtcVoiceReceiveChannel::~WebRtcVoiceReceiveChannel";
// TODO(solenberg): Should be able to delete the streams directly, without
// going through RemoveNnStream(), once stream objects handle
// all (de)configuration.
while (!recv_streams_.empty()) {
RemoveRecvStream(recv_streams_.begin()->first);
}
}
bool WebRtcVoiceReceiveChannel::SetReceiverParameters(
const AudioReceiverParameters& params) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::SetReceiverParameters");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "WebRtcVoiceMediaChannel::SetReceiverParameters: "
<< params.ToString();
// TODO(pthatcher): Refactor this to be more clean now that we have
// all the information at once.
mid_ = params.mid;
if (!SetRecvCodecs(params.codecs)) {
return false;
}
if (!ValidateRtpExtensions(params.extensions, recv_rtp_extensions_)) {
return false;
}
std::vector<webrtc::RtpExtension> filtered_extensions = FilterRtpExtensions(
params.extensions, webrtc::RtpExtension::IsSupportedForAudio, false,
call_->trials());
if (recv_rtp_extensions_ != filtered_extensions) {
recv_rtp_extensions_.swap(filtered_extensions);
recv_rtp_extension_map_ =
webrtc::RtpHeaderExtensionMap(recv_rtp_extensions_);
}
SetRtcpMode(params.rtcp.reduced_size ? webrtc::RtcpMode::kReducedSize
: webrtc::RtcpMode::kCompound);
return true;
}
webrtc::RtpParameters WebRtcVoiceReceiveChannel::GetRtpReceiverParameters(
uint32_t ssrc) const {
RTC_DCHECK_RUN_ON(worker_thread_);
webrtc::RtpParameters rtp_params;
auto it = recv_streams_.find(ssrc);
if (it == recv_streams_.end()) {
RTC_LOG(LS_WARNING)
<< "Attempting to get RTP receive parameters for stream "
"with ssrc "
<< ssrc << " which doesn't exist.";
return webrtc::RtpParameters();
}
rtp_params.encodings.emplace_back();
rtp_params.encodings.back().ssrc = it->second->stream().remote_ssrc();
rtp_params.header_extensions = recv_rtp_extensions_;
for (const Codec& codec : recv_codecs_) {
rtp_params.codecs.push_back(codec.ToCodecParameters());
}
rtp_params.rtcp.reduced_size =
recv_rtcp_mode_ == webrtc::RtcpMode::kReducedSize;
return rtp_params;
}
webrtc::RtpParameters
WebRtcVoiceReceiveChannel::GetDefaultRtpReceiveParameters() const {
RTC_DCHECK_RUN_ON(worker_thread_);
webrtc::RtpParameters rtp_params;
if (!default_sink_) {
// Getting parameters on a default, unsignaled audio receive stream but
// because we've not configured to receive such a stream, `encodings` is
// empty.
return rtp_params;
}
rtp_params.encodings.emplace_back();
for (const Codec& codec : recv_codecs_) {
rtp_params.codecs.push_back(codec.ToCodecParameters());
}
return rtp_params;
}
bool WebRtcVoiceReceiveChannel::SetOptions(const AudioOptions& options) {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "Setting voice channel options: " << options.ToString();
// We retain all of the existing options, and apply the given ones
// on top. This means there is no way to "clear" options such that
// they go back to the engine default.
options_.SetAll(options);
engine()->ApplyOptions(options_);
RTC_LOG(LS_INFO) << "Set voice receive channel options. Current options: "
<< options_.ToString();
return true;
}
bool WebRtcVoiceReceiveChannel::SetRecvCodecs(
const std::vector<Codec>& codecs_in) {
RTC_DCHECK_RUN_ON(worker_thread_);
auto codecs = codecs_in;
// Record the payload types used in the payload type suggester.
RTC_LOG(LS_INFO) << "Setting receive voice codecs. Mid is " << mid_;
for (auto& codec : codecs) {
auto error = call_->GetPayloadTypeSuggester()->AddLocalMapping(
mid_, codec.id, codec);
if (!error.ok()) {
RTC_LOG(LS_ERROR) << "Failed to register PT for " << codec.ToString();
return false;
}
}
if (!VerifyUniquePayloadTypes(codecs)) {
RTC_LOG(LS_ERROR) << "Codec payload types overlap.";
return false;
}
// Create a payload type -> SdpAudioFormat map with all the decoders. Fail
// unless the factory claims to support all decoders.
std::map<int, webrtc::SdpAudioFormat> decoder_map;
for (const Codec& codec : codecs) {
// Log a warning if a codec's payload type is changing. This used to be
// treated as an error. It's abnormal, but not really illegal.
std::optional<Codec> old_codec = FindCodec(recv_codecs_, codec);
if (old_codec && old_codec->id != codec.id) {
RTC_LOG(LS_WARNING) << codec.name << " mapped to a second payload type ("
<< codec.id << ", was already mapped to "
<< old_codec->id << ")";
}
auto format = AudioCodecToSdpAudioFormat(codec);
if (!IsCodec(codec, kCnCodecName) && !IsCodec(codec, kDtmfCodecName) &&
!IsCodec(codec, kRedCodecName) &&
!engine()->decoder_factory_->IsSupportedDecoder(format)) {
RTC_LOG(LS_ERROR) << "Unsupported codec: " << rtc::ToString(format);
return false;
}
// We allow adding new codecs but don't allow changing the payload type of
// codecs that are already configured since we might already be receiving
// packets with that payload type. See RFC3264, Section 8.3.2.
// TODO(deadbeef): Also need to check for clashes with previously mapped
// payload types, and not just currently mapped ones. For example, this
// should be illegal:
// 1. {100: opus/48000/2, 101: ISAC/16000}
// 2. {100: opus/48000/2}
// 3. {100: opus/48000/2, 101: ISAC/32000}
// Though this check really should happen at a higher level, since this
// conflict could happen between audio and video codecs.
auto existing = decoder_map_.find(codec.id);
if (existing != decoder_map_.end() && !existing->second.Matches(format)) {
RTC_LOG(LS_ERROR) << "Attempting to use payload type " << codec.id
<< " for " << codec.name
<< ", but it is already used for "
<< existing->second.name;
return false;
}
decoder_map.insert({codec.id, std::move(format)});
}
if (decoder_map == decoder_map_) {
// There's nothing new to configure.
return true;
}
bool playout_enabled = playout_;
// Receive codecs can not be changed while playing. So we temporarily
// pause playout.
SetPlayout(false);
RTC_DCHECK(!playout_);
decoder_map_ = std::move(decoder_map);
for (auto& kv : recv_streams_) {
kv.second->SetDecoderMap(decoder_map_);
}
recv_codecs_ = codecs;
SetPlayout(playout_enabled);
RTC_DCHECK_EQ(playout_, playout_enabled);
return true;
}
void WebRtcVoiceReceiveChannel::SetReceiveNackEnabled(bool enabled) {
// Check if the NACK status has changed on the
// preferred send codec, and in that case reconfigure all receive streams.
if (recv_nack_enabled_ != enabled) {
RTC_LOG(LS_INFO) << "Changing NACK status on receive streams.";
recv_nack_enabled_ = enabled;
for (auto& kv : recv_streams_) {
kv.second->SetUseNack(recv_nack_enabled_);
}
}
}
void WebRtcVoiceReceiveChannel::SetRtcpMode(webrtc::RtcpMode mode) {
// Check if the reduced size RTCP status changed on the
// preferred send codec, and in that case reconfigure all receive streams.
if (recv_rtcp_mode_ != mode) {
RTC_LOG(LS_INFO) << "Changing RTCP mode on receive streams.";
recv_rtcp_mode_ = mode;
for (auto& kv : recv_streams_) {
kv.second->SetRtcpMode(recv_rtcp_mode_);
}
}
}
void WebRtcVoiceReceiveChannel::SetReceiveNonSenderRttEnabled(bool enabled) {
// Check if the receive-side RTT status has changed on the preferred send
// codec, in that case reconfigure all receive streams.
if (enable_non_sender_rtt_ != enabled) {
RTC_LOG(LS_INFO) << "Changing receive-side RTT status on receive streams.";
enable_non_sender_rtt_ = enabled;
for (auto& kv : recv_streams_) {
kv.second->SetNonSenderRttMeasurement(enable_non_sender_rtt_);
}
}
}
void WebRtcVoiceReceiveChannel::SetPlayout(bool playout) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::SetPlayout");
RTC_DCHECK_RUN_ON(worker_thread_);
if (playout_ == playout) {
return;
}
for (const auto& kv : recv_streams_) {
kv.second->SetPlayout(playout);
}
playout_ = playout;
}
bool WebRtcVoiceReceiveChannel::AddRecvStream(const StreamParams& sp) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::AddRecvStream");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "AddRecvStream: " << sp.ToString();
if (!sp.has_ssrcs()) {
// This is a StreamParam with unsignaled SSRCs. Store it, so it can be used
// later when we know the SSRCs on the first packet arrival.
unsignaled_stream_params_ = sp;
return true;
}
if (!ValidateStreamParams(sp)) {
return false;
}
const uint32_t ssrc = sp.first_ssrc();
// If this stream was previously received unsignaled, we promote it, possibly
// updating the sync group if stream ids have changed.
if (MaybeDeregisterUnsignaledRecvStream(ssrc)) {
auto stream_ids = sp.stream_ids();
std::string sync_group = stream_ids.empty() ? std::string() : stream_ids[0];
call_->OnUpdateSyncGroup(recv_streams_[ssrc]->stream(),
std::move(sync_group));
return true;
}
if (recv_streams_.find(ssrc) != recv_streams_.end()) {
RTC_LOG(LS_ERROR) << "Stream already exists with ssrc " << ssrc;
return false;
}
// Create a new channel for receiving audio data.
auto config = BuildReceiveStreamConfig(
ssrc, receiver_reports_ssrc_, recv_nack_enabled_, enable_non_sender_rtt_,
sp.stream_ids(), recv_rtp_extensions_, transport(),
engine()->decoder_factory_, decoder_map_, codec_pair_id_,
engine()->audio_jitter_buffer_max_packets_,
engine()->audio_jitter_buffer_fast_accelerate_,
engine()->audio_jitter_buffer_min_delay_ms_, unsignaled_frame_decryptor_,
crypto_options_, unsignaled_frame_transformer_);
recv_streams_.insert(std::make_pair(
ssrc, new WebRtcAudioReceiveStream(std::move(config), call_)));
recv_streams_[ssrc]->SetPlayout(playout_);
return true;
}
bool WebRtcVoiceReceiveChannel::RemoveRecvStream(uint32_t ssrc) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::RemoveRecvStream");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "RemoveRecvStream: " << ssrc;
const auto it = recv_streams_.find(ssrc);
if (it == recv_streams_.end()) {
RTC_LOG(LS_WARNING) << "Try to remove stream with ssrc " << ssrc
<< " which doesn't exist.";
return false;
}
MaybeDeregisterUnsignaledRecvStream(ssrc);
it->second->SetRawAudioSink(nullptr);
delete it->second;
recv_streams_.erase(it);
return true;
}
void WebRtcVoiceReceiveChannel::ResetUnsignaledRecvStream() {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << "ResetUnsignaledRecvStream.";
unsignaled_stream_params_ = StreamParams();
// Create a copy since RemoveRecvStream will modify `unsignaled_recv_ssrcs_`.
std::vector<uint32_t> to_remove = unsignaled_recv_ssrcs_;
for (uint32_t ssrc : to_remove) {
RemoveRecvStream(ssrc);
}
}
std::optional<uint32_t> WebRtcVoiceReceiveChannel::GetUnsignaledSsrc() const {
if (unsignaled_recv_ssrcs_.empty()) {
return std::nullopt;
}
// In the event of multiple unsignaled ssrcs, the last in the vector will be
// the most recent one (the one forwarded to the MediaStreamTrack).
return unsignaled_recv_ssrcs_.back();
}
void WebRtcVoiceReceiveChannel::ChooseReceiverReportSsrc(
const std::set<uint32_t>& choices) {
// Don't change SSRC if set is empty. Note that this differs from
// the behavior of video.
if (choices.empty()) {
return;
}
if (choices.find(receiver_reports_ssrc_) != choices.end()) {
return;
}
uint32_t ssrc = *(choices.begin());
receiver_reports_ssrc_ = ssrc;
for (auto& kv : recv_streams_) {
call_->OnLocalSsrcUpdated(kv.second->stream(), ssrc);
}
}
// Not implemented.
// TODO(https://crbug.com/webrtc/12676): Implement a fix for the unsignalled
// SSRC race that can happen when an m= section goes from receiving to not
// receiving.
void WebRtcVoiceReceiveChannel::OnDemuxerCriteriaUpdatePending() {}
void WebRtcVoiceReceiveChannel::OnDemuxerCriteriaUpdateComplete() {}
bool WebRtcVoiceReceiveChannel::SetOutputVolume(uint32_t ssrc, double volume) {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_INFO) << rtc::StringFormat("WRVMC::%s({ssrc=%u}, {volume=%.2f})",
__func__, ssrc, volume);
const auto it = recv_streams_.find(ssrc);
if (it == recv_streams_.end()) {
RTC_LOG(LS_WARNING) << rtc::StringFormat(
"WRVMC::%s => (WARNING: no receive stream for SSRC %u)", __func__,
ssrc);
return false;
}
it->second->SetOutputVolume(volume);
RTC_LOG(LS_INFO) << rtc::StringFormat(
"WRVMC::%s => (stream with SSRC %u now uses volume %.2f)", __func__, ssrc,
volume);
return true;
}
bool WebRtcVoiceReceiveChannel::SetDefaultOutputVolume(double volume) {
RTC_DCHECK_RUN_ON(worker_thread_);
default_recv_volume_ = volume;
for (uint32_t ssrc : unsignaled_recv_ssrcs_) {
const auto it = recv_streams_.find(ssrc);
if (it == recv_streams_.end()) {
RTC_LOG(LS_WARNING) << "SetDefaultOutputVolume: no recv stream " << ssrc;
return false;
}
it->second->SetOutputVolume(volume);
RTC_LOG(LS_INFO) << "SetDefaultOutputVolume() to " << volume
<< " for recv stream with ssrc " << ssrc;
}
return true;
}
bool WebRtcVoiceReceiveChannel::SetBaseMinimumPlayoutDelayMs(uint32_t ssrc,
int delay_ms) {
RTC_DCHECK_RUN_ON(worker_thread_);
std::vector<uint32_t> ssrcs(1, ssrc);
// SSRC of 0 represents the default receive stream.
if (ssrc == 0) {
default_recv_base_minimum_delay_ms_ = delay_ms;
ssrcs = unsignaled_recv_ssrcs_;
}
for (uint32_t ssrc : ssrcs) {
const auto it = recv_streams_.find(ssrc);
if (it == recv_streams_.end()) {
RTC_LOG(LS_WARNING) << "SetBaseMinimumPlayoutDelayMs: no recv stream "
<< ssrc;
return false;
}
it->second->SetBaseMinimumPlayoutDelayMs(delay_ms);
RTC_LOG(LS_INFO) << "SetBaseMinimumPlayoutDelayMs() to " << delay_ms
<< " for recv stream with ssrc " << ssrc;
}
return true;
}
std::optional<int> WebRtcVoiceReceiveChannel::GetBaseMinimumPlayoutDelayMs(
uint32_t ssrc) const {
// SSRC of 0 represents the default receive stream.
if (ssrc == 0) {
return default_recv_base_minimum_delay_ms_;
}
const auto it = recv_streams_.find(ssrc);
if (it != recv_streams_.end()) {
return it->second->GetBaseMinimumPlayoutDelayMs();
}
return std::nullopt;
}
void WebRtcVoiceReceiveChannel::SetFrameDecryptor(
uint32_t ssrc,
rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor) {
RTC_DCHECK_RUN_ON(worker_thread_);
auto matching_stream = recv_streams_.find(ssrc);
if (matching_stream != recv_streams_.end()) {
matching_stream->second->SetFrameDecryptor(frame_decryptor);
}
// Handle unsignaled frame decryptors.
if (ssrc == 0) {
unsignaled_frame_decryptor_ = frame_decryptor;
}
}
void WebRtcVoiceReceiveChannel::OnPacketReceived(
const webrtc::RtpPacketReceived& packet) {
RTC_DCHECK_RUN_ON(&network_thread_checker_);
// TODO(bugs.webrtc.org/11993): This code is very similar to what
// WebRtcVideoChannel::OnPacketReceived does. For maintainability and
// consistency it would be good to move the interaction with
// call_->Receiver() to a common implementation and provide a callback on
// the worker thread for the exception case (DELIVERY_UNKNOWN_SSRC) and
// how retry is attempted.
worker_thread_->PostTask(
SafeTask(task_safety_.flag(), [this, packet = packet]() mutable {
RTC_DCHECK_RUN_ON(worker_thread_);
// TODO(bugs.webrtc.org/7135): extensions in `packet` is currently set
// in RtpTransport and does not neccessarily include extensions specific
// to this channel/MID. Also see comment in
// BaseChannel::MaybeUpdateDemuxerAndRtpExtensions_w.
// It would likely be good if extensions where merged per BUNDLE and
// applied directly in RtpTransport::DemuxPacket;
packet.IdentifyExtensions(recv_rtp_extension_map_);
if (!packet.arrival_time().IsFinite()) {
packet.set_arrival_time(webrtc::Timestamp::Micros(rtc::TimeMicros()));
}
call_->Receiver()->DeliverRtpPacket(
webrtc::MediaType::AUDIO, std::move(packet),
absl::bind_front(
&WebRtcVoiceReceiveChannel::MaybeCreateDefaultReceiveStream,
this));
}));
}
bool WebRtcVoiceReceiveChannel::MaybeCreateDefaultReceiveStream(
const webrtc::RtpPacketReceived& packet) {
// Create an unsignaled receive stream for this previously not received
// ssrc. If there already is N unsignaled receive streams, delete the
// oldest. See: https://bugs.chromium.org/p/webrtc/issues/detail?id=5208
uint32_t ssrc = packet.Ssrc();
RTC_DCHECK(!absl::c_linear_search(unsignaled_recv_ssrcs_, ssrc));
// Add new stream.
StreamParams sp = unsignaled_stream_params_;
sp.ssrcs.push_back(ssrc);
RTC_LOG(LS_INFO) << "Creating unsignaled receive stream for SSRC=" << ssrc;
if (!AddRecvStream(sp)) {
RTC_LOG(LS_WARNING) << "Could not create unsignaled receive stream.";
return false;
}
unsignaled_recv_ssrcs_.push_back(ssrc);
RTC_HISTOGRAM_COUNTS_LINEAR("WebRTC.Audio.NumOfUnsignaledStreams",
unsignaled_recv_ssrcs_.size(), 1, 100, 101);
// Remove oldest unsignaled stream, if we have too many.
if (unsignaled_recv_ssrcs_.size() > kMaxUnsignaledRecvStreams) {
uint32_t remove_ssrc = unsignaled_recv_ssrcs_.front();
RTC_DLOG(LS_INFO) << "Removing unsignaled receive stream with SSRC="
<< remove_ssrc;
RemoveRecvStream(remove_ssrc);
}
RTC_DCHECK_GE(kMaxUnsignaledRecvStreams, unsignaled_recv_ssrcs_.size());
SetOutputVolume(ssrc, default_recv_volume_);
SetBaseMinimumPlayoutDelayMs(ssrc, default_recv_base_minimum_delay_ms_);
// The default sink can only be attached to one stream at a time, so we hook
// it up to the *latest* unsignaled stream we've seen, in order to support
// the case where the SSRC of one unsignaled stream changes.
if (default_sink_) {
for (uint32_t drop_ssrc : unsignaled_recv_ssrcs_) {
auto it = recv_streams_.find(drop_ssrc);
it->second->SetRawAudioSink(nullptr);
}
std::unique_ptr<webrtc::AudioSinkInterface> proxy_sink(
new ProxySink(default_sink_.get()));
SetRawAudioSink(ssrc, std::move(proxy_sink));
}
return true;
}
bool WebRtcVoiceReceiveChannel::GetStats(VoiceMediaReceiveInfo* info,
bool get_and_clear_legacy_stats) {
TRACE_EVENT0("webrtc", "WebRtcVoiceMediaChannel::GetReceiveStats");
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_DCHECK(info);
// Get SSRC and stats for each receiver.
RTC_DCHECK_EQ(info->receivers.size(), 0U);
for (const auto& stream : recv_streams_) {
uint32_t ssrc = stream.first;
// When SSRCs are unsignaled, there's only one audio MediaStreamTrack, but
// multiple RTP streams can be received over time (if the SSRC changes for
// whatever reason). We only want the RTCMediaStreamTrackStats to represent
// the stats for the most recent stream (the one whose audio is actually
// routed to the MediaStreamTrack), so here we ignore any unsignaled SSRCs
// except for the most recent one (last in the vector). This is somewhat of
// a hack, and means you don't get *any* stats for these inactive streams,
// but it's slightly better than the previous behavior, which was "highest
// SSRC wins".
// See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8158
if (!unsignaled_recv_ssrcs_.empty()) {
auto end_it = --unsignaled_recv_ssrcs_.end();
if (absl::linear_search(unsignaled_recv_ssrcs_.begin(), end_it, ssrc)) {
continue;
}
}
webrtc::AudioReceiveStreamInterface::Stats stats =
stream.second->GetStats(get_and_clear_legacy_stats);
VoiceReceiverInfo rinfo;
rinfo.add_ssrc(stats.remote_ssrc);
rinfo.payload_bytes_received = stats.payload_bytes_received;
rinfo.header_and_padding_bytes_received =
stats.header_and_padding_bytes_received;
rinfo.packets_received = stats.packets_received;
rinfo.fec_packets_received = stats.fec_packets_received;
rinfo.fec_packets_discarded = stats.fec_packets_discarded;
rinfo.packets_lost = stats.packets_lost;
rinfo.packets_discarded = stats.packets_discarded;
rinfo.codec_name = stats.codec_name;
rinfo.codec_payload_type = stats.codec_payload_type;
rinfo.jitter_ms = stats.jitter_ms;
rinfo.jitter_buffer_ms = stats.jitter_buffer_ms;
rinfo.jitter_buffer_preferred_ms = stats.jitter_buffer_preferred_ms;
rinfo.delay_estimate_ms = stats.delay_estimate_ms;
rinfo.audio_level = stats.audio_level;
rinfo.total_output_energy = stats.total_output_energy;
rinfo.total_samples_received = stats.total_samples_received;
rinfo.total_output_duration = stats.total_output_duration;
rinfo.concealed_samples = stats.concealed_samples;
rinfo.silent_concealed_samples = stats.silent_concealed_samples;
rinfo.concealment_events = stats.concealment_events;
rinfo.jitter_buffer_delay_seconds = stats.jitter_buffer_delay_seconds;
rinfo.jitter_buffer_emitted_count = stats.jitter_buffer_emitted_count;
rinfo.jitter_buffer_target_delay_seconds =
stats.jitter_buffer_target_delay_seconds;
rinfo.jitter_buffer_minimum_delay_seconds =
stats.jitter_buffer_minimum_delay_seconds;
rinfo.inserted_samples_for_deceleration =
stats.inserted_samples_for_deceleration;
rinfo.removed_samples_for_acceleration =
stats.removed_samples_for_acceleration;
rinfo.expand_rate = stats.expand_rate;
rinfo.speech_expand_rate = stats.speech_expand_rate;
rinfo.secondary_decoded_rate = stats.secondary_decoded_rate;
rinfo.secondary_discarded_rate = stats.secondary_discarded_rate;
rinfo.accelerate_rate = stats.accelerate_rate;
rinfo.preemptive_expand_rate = stats.preemptive_expand_rate;
rinfo.delayed_packet_outage_samples = stats.delayed_packet_outage_samples;
rinfo.decoding_calls_to_silence_generator =
stats.decoding_calls_to_silence_generator;
rinfo.decoding_calls_to_neteq = stats.decoding_calls_to_neteq;
rinfo.decoding_normal = stats.decoding_normal;
rinfo.decoding_plc = stats.decoding_plc;
rinfo.decoding_codec_plc = stats.decoding_codec_plc;
rinfo.decoding_cng = stats.decoding_cng;
rinfo.decoding_plc_cng = stats.decoding_plc_cng;
rinfo.decoding_muted_output = stats.decoding_muted_output;
rinfo.capture_start_ntp_time_ms = stats.capture_start_ntp_time_ms;
rinfo.last_packet_received = stats.last_packet_received;
rinfo.estimated_playout_ntp_timestamp_ms =
stats.estimated_playout_ntp_timestamp_ms;
rinfo.jitter_buffer_flushes = stats.jitter_buffer_flushes;
rinfo.relative_packet_arrival_delay_seconds =
stats.relative_packet_arrival_delay_seconds;
rinfo.interruption_count = stats.interruption_count;
rinfo.total_interruption_duration_ms = stats.total_interruption_duration_ms;
rinfo.last_sender_report_timestamp = stats.last_sender_report_timestamp;
rinfo.last_sender_report_utc_timestamp =
stats.last_sender_report_utc_timestamp;
rinfo.last_sender_report_remote_utc_timestamp =
stats.last_sender_report_remote_utc_timestamp;
rinfo.sender_reports_packets_sent = stats.sender_reports_packets_sent;
rinfo.sender_reports_bytes_sent = stats.sender_reports_bytes_sent;
rinfo.sender_reports_reports_count = stats.sender_reports_reports_count;
rinfo.round_trip_time = stats.round_trip_time;
rinfo.round_trip_time_measurements = stats.round_trip_time_measurements;
rinfo.total_round_trip_time = stats.total_round_trip_time;
rinfo.total_processing_delay_seconds = stats.total_processing_delay_seconds;
if (recv_nack_enabled_) {
rinfo.nacks_sent = stats.nacks_sent;
}
info->receivers.push_back(rinfo);
}
FillReceiveCodecStats(info);
info->device_underrun_count = engine_->adm()->GetPlayoutUnderrunCount();
return true;
}
void WebRtcVoiceReceiveChannel::FillReceiveCodecStats(
VoiceMediaReceiveInfo* voice_media_info) {
for (const auto& receiver : voice_media_info->receivers) {
auto codec =
absl::c_find_if(recv_codecs_, [&receiver](const Codec& c) {
return receiver.codec_payload_type &&
*receiver.codec_payload_type == c.id;
});
if (codec != recv_codecs_.end()) {
voice_media_info->receive_codecs.insert(
std::make_pair(codec->id, codec->ToCodecParameters()));
}
}
}
void WebRtcVoiceReceiveChannel::SetRawAudioSink(
uint32_t ssrc,
std::unique_ptr<webrtc::AudioSinkInterface> sink) {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_VERBOSE) << "WebRtcVoiceMediaChannel::SetRawAudioSink: ssrc:"
<< ssrc << " " << (sink ? "(ptr)" : "NULL");
const auto it = recv_streams_.find(ssrc);
if (it == recv_streams_.end()) {
RTC_LOG(LS_WARNING) << "SetRawAudioSink: no recv stream " << ssrc;
return;
}
it->second->SetRawAudioSink(std::move(sink));
}
void WebRtcVoiceReceiveChannel::SetDefaultRawAudioSink(
std::unique_ptr<webrtc::AudioSinkInterface> sink) {
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_LOG(LS_VERBOSE) << "WebRtcVoiceMediaChannel::SetDefaultRawAudioSink:";
if (!unsignaled_recv_ssrcs_.empty()) {
std::unique_ptr<webrtc::AudioSinkInterface> proxy_sink(
sink ? new ProxySink(sink.get()) : nullptr);
SetRawAudioSink(unsignaled_recv_ssrcs_.back(), std::move(proxy_sink));
}
default_sink_ = std::move(sink);
}
std::vector<webrtc::RtpSource> WebRtcVoiceReceiveChannel::GetSources(
uint32_t ssrc) const {
auto it = recv_streams_.find(ssrc);
if (it == recv_streams_.end()) {
RTC_LOG(LS_ERROR) << "Attempting to get contributing sources for SSRC:"
<< ssrc << " which doesn't exist.";
return std::vector<webrtc::RtpSource>();
}
return it->second->GetSources();
}
void WebRtcVoiceReceiveChannel::SetDepacketizerToDecoderFrameTransformer(
uint32_t ssrc,
rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
RTC_DCHECK_RUN_ON(worker_thread_);
if (ssrc == 0) {
// If the receiver is unsignaled, save the frame transformer and set it when
// the stream is associated with an ssrc.
unsignaled_frame_transformer_ = std::move(frame_transformer);
return;
}
auto matching_stream = recv_streams_.find(ssrc);
if (matching_stream == recv_streams_.end()) {
RTC_LOG(LS_INFO) << "Attempting to set frame transformer for SSRC:" << ssrc
<< " which doesn't exist.";
return;
}
matching_stream->second->SetDepacketizerToDecoderFrameTransformer(
std::move(frame_transformer));
}
bool WebRtcVoiceReceiveChannel::MaybeDeregisterUnsignaledRecvStream(
uint32_t ssrc) {
RTC_DCHECK_RUN_ON(worker_thread_);
auto it = absl::c_find(unsignaled_recv_ssrcs_, ssrc);
if (it != unsignaled_recv_ssrcs_.end()) {
unsignaled_recv_ssrcs_.erase(it);
return true;
}
return false;
}
} // namespace cricket