media/base/media_channel.cc

/*
 *  Copyright (c) 2018 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/base/media_channel.h"

namespace cricket {

VideoOptions::VideoOptions()
    : content_hint(webrtc::VideoTrackInterface::ContentHint::kNone) {}
VideoOptions::~VideoOptions() = default;

MediaChannel::MediaChannel(const MediaConfig& config)
    : enable_dscp_(config.enable_dscp) {}

MediaChannel::MediaChannel() : enable_dscp_(false) {}

MediaChannel::~MediaChannel() {}

void MediaChannel::SetInterface(NetworkInterface* iface) {
  webrtc::MutexLock lock(&network_interface_mutex_);
  network_interface_ = iface;
  UpdateDscp();
}

int MediaChannel::GetRtpSendTimeExtnId() const {
  return -1;
}

void MediaChannel::SetFrameEncryptor(
    uint32_t ssrc,
    rtc::scoped_refptr<webrtc::FrameEncryptorInterface> frame_encryptor) {
  // Placeholder should be pure virtual once internal supports it.
}

void MediaChannel::SetFrameDecryptor(
    uint32_t ssrc,
    rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor) {
  // Placeholder should be pure virtual once internal supports it.
}

void MediaChannel::SetVideoCodecSwitchingEnabled(bool enabled) {}

bool MediaChannel::SendPacket(rtc::CopyOnWriteBuffer* packet,
                              const rtc::PacketOptions& options) {
  return DoSendPacket(packet, false, options);
}

bool MediaChannel::SendRtcp(rtc::CopyOnWriteBuffer* packet,
                            const rtc::PacketOptions& options) {
  return DoSendPacket(packet, true, options);
}

int MediaChannel::SetOption(NetworkInterface::SocketType type,
                            rtc::Socket::Option opt,
                            int option)
    RTC_LOCKS_EXCLUDED(network_interface_mutex_) {
  webrtc::MutexLock lock(&network_interface_mutex_);
  return SetOptionLocked(type, opt, option);
}

// Corresponds to the SDP attribute extmap-allow-mixed, see RFC8285.
// Set to true if it's allowed to mix one- and two-byte RTP header extensions
// in the same stream. The setter and getter must only be called from
// worker_thread.
void MediaChannel::SetExtmapAllowMixed(bool extmap_allow_mixed) {
  extmap_allow_mixed_ = extmap_allow_mixed;
}

bool MediaChannel::ExtmapAllowMixed() const {
  return extmap_allow_mixed_;
}

void MediaChannel::SetEncoderToPacketizerFrameTransformer(
    uint32_t ssrc,
    rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {}

void MediaChannel::SetDepacketizerToDecoderFrameTransformer(
    uint32_t ssrc,
    rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {}

int MediaChannel::SetOptionLocked(NetworkInterface::SocketType type,
                                  rtc::Socket::Option opt,
                                  int option) {
  if (!network_interface_)
    return -1;
  return network_interface_->SetOption(type, opt, option);
}

bool MediaChannel::DscpEnabled() const {
  return enable_dscp_;
}

// This is the DSCP value used for both RTP and RTCP channels if DSCP is
// enabled. It can be changed at any time via |SetPreferredDscp|.
rtc::DiffServCodePoint MediaChannel::PreferredDscp() const {
  webrtc::MutexLock lock(&network_interface_mutex_);
  return preferred_dscp_;
}

int MediaChannel::SetPreferredDscp(rtc::DiffServCodePoint preferred_dscp) {
  webrtc::MutexLock lock(&network_interface_mutex_);
  if (preferred_dscp == preferred_dscp_) {
    return 0;
  }
  preferred_dscp_ = preferred_dscp;
  return UpdateDscp();
}

int MediaChannel::UpdateDscp() {
  rtc::DiffServCodePoint value =
      enable_dscp_ ? preferred_dscp_ : rtc::DSCP_DEFAULT;
  int ret =
      SetOptionLocked(NetworkInterface::ST_RTP, rtc::Socket::OPT_DSCP, value);
  if (ret == 0) {
    ret = SetOptionLocked(NetworkInterface::ST_RTCP, rtc::Socket::OPT_DSCP,
                          value);
  }
  return ret;
}

bool MediaChannel::DoSendPacket(rtc::CopyOnWriteBuffer* packet,
                                bool rtcp,
                                const rtc::PacketOptions& options) {
  webrtc::MutexLock lock(&network_interface_mutex_);
  if (!network_interface_)
    return false;

  return (!rtcp) ? network_interface_->SendPacket(packet, options)
                 : network_interface_->SendRtcp(packet, options);
}

MediaSenderInfo::MediaSenderInfo() = default;
MediaSenderInfo::~MediaSenderInfo() = default;

MediaReceiverInfo::MediaReceiverInfo() = default;
MediaReceiverInfo::~MediaReceiverInfo() = default;

VoiceSenderInfo::VoiceSenderInfo() = default;
VoiceSenderInfo::~VoiceSenderInfo() = default;

VoiceReceiverInfo::VoiceReceiverInfo() = default;
VoiceReceiverInfo::~VoiceReceiverInfo() = default;

VideoSenderInfo::VideoSenderInfo() = default;
VideoSenderInfo::~VideoSenderInfo() = default;

VideoReceiverInfo::VideoReceiverInfo() = default;
VideoReceiverInfo::~VideoReceiverInfo() = default;

VoiceMediaInfo::VoiceMediaInfo() = default;
VoiceMediaInfo::~VoiceMediaInfo() = default;

VideoMediaInfo::VideoMediaInfo() = default;
VideoMediaInfo::~VideoMediaInfo() = default;

AudioSendParameters::AudioSendParameters() = default;
AudioSendParameters::~AudioSendParameters() = default;

std::map<std::string, std::string> AudioSendParameters::ToStringMap() const {
  auto params = RtpSendParameters<AudioCodec>::ToStringMap();
  params["options"] = options.ToString();
  return params;
}

cricket::MediaType VoiceMediaChannel::media_type() const {
  return cricket::MediaType::MEDIA_TYPE_AUDIO;
}

VideoSendParameters::VideoSendParameters() = default;
VideoSendParameters::~VideoSendParameters() = default;

std::map<std::string, std::string> VideoSendParameters::ToStringMap() const {
  auto params = RtpSendParameters<VideoCodec>::ToStringMap();
  params["conference_mode"] = (conference_mode ? "yes" : "no");
  return params;
}

cricket::MediaType VideoMediaChannel::media_type() const {
  return cricket::MediaType::MEDIA_TYPE_VIDEO;
}

}  // namespace cricket