| /* |
| * Copyright 2013 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 "api/mediaconstraintsinterface.h" |
| |
| #include "api/peerconnectioninterface.h" |
| #include "rtc_base/stringencode.h" |
| |
| namespace { |
| |
| // Find the highest-priority instance of the T-valued constraint named by |
| // |key| and return its value as |value|. |constraints| can be null. |
| // If |mandatory_constraints| is non-null, it is incremented if the key appears |
| // among the mandatory constraints. |
| // Returns true if the key was found and has a valid value for type T. |
| // If the key appears multiple times as an optional constraint, appearances |
| // after the first are ignored. |
| // Note: Because this uses FindFirst, repeated optional constraints whose |
| // first instance has an unrecognized value are not handled precisely in |
| // accordance with the specification. |
| template <typename T> |
| bool FindConstraint(const webrtc::MediaConstraintsInterface* constraints, |
| const std::string& key, |
| T* value, |
| size_t* mandatory_constraints) { |
| std::string string_value; |
| if (!FindConstraint(constraints, key, &string_value, mandatory_constraints)) { |
| return false; |
| } |
| return rtc::FromString(string_value, value); |
| } |
| |
| // Specialization for std::string, since a string doesn't need conversion. |
| template <> |
| bool FindConstraint(const webrtc::MediaConstraintsInterface* constraints, |
| const std::string& key, |
| std::string* value, |
| size_t* mandatory_constraints) { |
| if (!constraints) { |
| return false; |
| } |
| if (constraints->GetMandatory().FindFirst(key, value)) { |
| if (mandatory_constraints) { |
| ++*mandatory_constraints; |
| } |
| return true; |
| } |
| if (constraints->GetOptional().FindFirst(key, value)) { |
| return true; |
| } |
| return false; |
| } |
| |
| // Converts a constraint (mandatory takes precedence over optional) to an |
| // absl::optional. |
| template <typename T> |
| void ConstraintToOptional(const webrtc::MediaConstraintsInterface* constraints, |
| const std::string& key, |
| absl::optional<T>* value_out) { |
| T value; |
| bool present = FindConstraint<T>(constraints, key, &value, nullptr); |
| if (present) { |
| *value_out = value; |
| } |
| } |
| } // namespace |
| |
| namespace webrtc { |
| |
| const char MediaConstraintsInterface::kValueTrue[] = "true"; |
| const char MediaConstraintsInterface::kValueFalse[] = "false"; |
| |
| // Constraints declared as static members in mediastreaminterface.h |
| // Specified by draft-alvestrand-constraints-resolution-00b |
| const char MediaConstraintsInterface::kMinAspectRatio[] = "minAspectRatio"; |
| const char MediaConstraintsInterface::kMaxAspectRatio[] = "maxAspectRatio"; |
| const char MediaConstraintsInterface::kMaxWidth[] = "maxWidth"; |
| const char MediaConstraintsInterface::kMinWidth[] = "minWidth"; |
| const char MediaConstraintsInterface::kMaxHeight[] = "maxHeight"; |
| const char MediaConstraintsInterface::kMinHeight[] = "minHeight"; |
| const char MediaConstraintsInterface::kMaxFrameRate[] = "maxFrameRate"; |
| const char MediaConstraintsInterface::kMinFrameRate[] = "minFrameRate"; |
| |
| // Audio constraints. |
| const char MediaConstraintsInterface::kEchoCancellation[] = "echoCancellation"; |
| const char MediaConstraintsInterface::kGoogEchoCancellation[] = |
| "googEchoCancellation"; |
| const char MediaConstraintsInterface::kExtendedFilterEchoCancellation[] = |
| "googEchoCancellation2"; |
| const char MediaConstraintsInterface::kDAEchoCancellation[] = |
| "googDAEchoCancellation"; |
| const char MediaConstraintsInterface::kAutoGainControl[] = |
| "googAutoGainControl"; |
| const char MediaConstraintsInterface::kExperimentalAutoGainControl[] = |
| "googAutoGainControl2"; |
| const char MediaConstraintsInterface::kNoiseSuppression[] = |
| "googNoiseSuppression"; |
| const char MediaConstraintsInterface::kExperimentalNoiseSuppression[] = |
| "googNoiseSuppression2"; |
| const char MediaConstraintsInterface::kHighpassFilter[] = "googHighpassFilter"; |
| const char MediaConstraintsInterface::kTypingNoiseDetection[] = |
| "googTypingNoiseDetection"; |
| const char MediaConstraintsInterface::kAudioMirroring[] = "googAudioMirroring"; |
| const char MediaConstraintsInterface::kAudioNetworkAdaptorConfig[] = |
| "googAudioNetworkAdaptorConfig"; |
| |
| // Google-specific constraint keys for a local video source (getUserMedia). |
| const char MediaConstraintsInterface::kNoiseReduction[] = "googNoiseReduction"; |
| |
| // Constraint keys for CreateOffer / CreateAnswer defined in W3C specification. |
| const char MediaConstraintsInterface::kOfferToReceiveAudio[] = |
| "OfferToReceiveAudio"; |
| const char MediaConstraintsInterface::kOfferToReceiveVideo[] = |
| "OfferToReceiveVideo"; |
| const char MediaConstraintsInterface::kVoiceActivityDetection[] = |
| "VoiceActivityDetection"; |
| const char MediaConstraintsInterface::kIceRestart[] = "IceRestart"; |
| // Google specific constraint for BUNDLE enable/disable. |
| const char MediaConstraintsInterface::kUseRtpMux[] = "googUseRtpMUX"; |
| |
| // Below constraints should be used during PeerConnection construction. |
| const char MediaConstraintsInterface::kEnableDtlsSrtp[] = |
| "DtlsSrtpKeyAgreement"; |
| const char MediaConstraintsInterface::kEnableRtpDataChannels[] = |
| "RtpDataChannels"; |
| // Google-specific constraint keys. |
| const char MediaConstraintsInterface::kEnableDscp[] = "googDscp"; |
| const char MediaConstraintsInterface::kEnableIPv6[] = "googIPv6"; |
| const char MediaConstraintsInterface::kEnableVideoSuspendBelowMinBitrate[] = |
| "googSuspendBelowMinBitrate"; |
| const char MediaConstraintsInterface::kCombinedAudioVideoBwe[] = |
| "googCombinedAudioVideoBwe"; |
| const char MediaConstraintsInterface::kScreencastMinBitrate[] = |
| "googScreencastMinBitrate"; |
| // TODO(ronghuawu): Remove once cpu overuse detection is stable. |
| const char MediaConstraintsInterface::kCpuOveruseDetection[] = |
| "googCpuOveruseDetection"; |
| const char MediaConstraintsInterface::kPayloadPadding[] = "googPayloadPadding"; |
| |
| const char MediaConstraintsInterface::kNumSimulcastLayers[] = |
| "googNumSimulcastLayers"; |
| |
| // Set |value| to the value associated with the first appearance of |key|, or |
| // return false if |key| is not found. |
| bool MediaConstraintsInterface::Constraints::FindFirst( |
| const std::string& key, |
| std::string* value) const { |
| for (Constraints::const_iterator iter = begin(); iter != end(); ++iter) { |
| if (iter->key == key) { |
| *value = iter->value; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool FindConstraint(const MediaConstraintsInterface* constraints, |
| const std::string& key, |
| bool* value, |
| size_t* mandatory_constraints) { |
| return ::FindConstraint<bool>(constraints, key, value, mandatory_constraints); |
| } |
| |
| bool FindConstraint(const MediaConstraintsInterface* constraints, |
| const std::string& key, |
| int* value, |
| size_t* mandatory_constraints) { |
| return ::FindConstraint<int>(constraints, key, value, mandatory_constraints); |
| } |
| |
| void CopyConstraintsIntoRtcConfiguration( |
| const MediaConstraintsInterface* constraints, |
| PeerConnectionInterface::RTCConfiguration* configuration) { |
| // Copy info from constraints into configuration, if present. |
| if (!constraints) { |
| return; |
| } |
| |
| bool enable_ipv6; |
| if (FindConstraint(constraints, MediaConstraintsInterface::kEnableIPv6, |
| &enable_ipv6, nullptr)) { |
| configuration->disable_ipv6 = !enable_ipv6; |
| } |
| FindConstraint(constraints, MediaConstraintsInterface::kEnableDscp, |
| &configuration->media_config.enable_dscp, nullptr); |
| FindConstraint(constraints, MediaConstraintsInterface::kCpuOveruseDetection, |
| &configuration->media_config.video.enable_cpu_adaptation, |
| nullptr); |
| FindConstraint(constraints, MediaConstraintsInterface::kEnableRtpDataChannels, |
| &configuration->enable_rtp_data_channel, nullptr); |
| // Find Suspend Below Min Bitrate constraint. |
| FindConstraint(constraints, |
| MediaConstraintsInterface::kEnableVideoSuspendBelowMinBitrate, |
| &configuration->media_config.video.suspend_below_min_bitrate, |
| nullptr); |
| ConstraintToOptional<int>(constraints, |
| MediaConstraintsInterface::kScreencastMinBitrate, |
| &configuration->screencast_min_bitrate); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kCombinedAudioVideoBwe, |
| &configuration->combined_audio_video_bwe); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kEnableDtlsSrtp, |
| &configuration->enable_dtls_srtp); |
| } |
| |
| void CopyConstraintsIntoAudioOptions( |
| const MediaConstraintsInterface* constraints, |
| cricket::AudioOptions* options) { |
| if (!constraints) { |
| return; |
| } |
| |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kGoogEchoCancellation, |
| &options->echo_cancellation); |
| ConstraintToOptional<bool>( |
| constraints, MediaConstraintsInterface::kExtendedFilterEchoCancellation, |
| &options->extended_filter_aec); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kDAEchoCancellation, |
| &options->delay_agnostic_aec); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kAutoGainControl, |
| &options->auto_gain_control); |
| ConstraintToOptional<bool>( |
| constraints, MediaConstraintsInterface::kExperimentalAutoGainControl, |
| &options->experimental_agc); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kNoiseSuppression, |
| &options->noise_suppression); |
| ConstraintToOptional<bool>( |
| constraints, MediaConstraintsInterface::kExperimentalNoiseSuppression, |
| &options->experimental_ns); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kHighpassFilter, |
| &options->highpass_filter); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kTypingNoiseDetection, |
| &options->typing_detection); |
| ConstraintToOptional<bool>(constraints, |
| MediaConstraintsInterface::kAudioMirroring, |
| &options->stereo_swapping); |
| ConstraintToOptional<std::string>( |
| constraints, MediaConstraintsInterface::kAudioNetworkAdaptorConfig, |
| &options->audio_network_adaptor_config); |
| // When |kAudioNetworkAdaptorConfig| is defined, it both means that audio |
| // network adaptor is desired, and provides the config string. |
| if (options->audio_network_adaptor_config) { |
| options->audio_network_adaptor = true; |
| } |
| } |
| |
| bool CopyConstraintsIntoOfferAnswerOptions( |
| const MediaConstraintsInterface* constraints, |
| PeerConnectionInterface::RTCOfferAnswerOptions* offer_answer_options) { |
| if (!constraints) { |
| return true; |
| } |
| |
| bool value = false; |
| size_t mandatory_constraints_satisfied = 0; |
| |
| if (FindConstraint(constraints, |
| MediaConstraintsInterface::kOfferToReceiveAudio, &value, |
| &mandatory_constraints_satisfied)) { |
| offer_answer_options->offer_to_receive_audio = |
| value ? PeerConnectionInterface::RTCOfferAnswerOptions:: |
| kOfferToReceiveMediaTrue |
| : 0; |
| } |
| |
| if (FindConstraint(constraints, |
| MediaConstraintsInterface::kOfferToReceiveVideo, &value, |
| &mandatory_constraints_satisfied)) { |
| offer_answer_options->offer_to_receive_video = |
| value ? PeerConnectionInterface::RTCOfferAnswerOptions:: |
| kOfferToReceiveMediaTrue |
| : 0; |
| } |
| if (FindConstraint(constraints, |
| MediaConstraintsInterface::kVoiceActivityDetection, &value, |
| &mandatory_constraints_satisfied)) { |
| offer_answer_options->voice_activity_detection = value; |
| } |
| if (FindConstraint(constraints, MediaConstraintsInterface::kUseRtpMux, &value, |
| &mandatory_constraints_satisfied)) { |
| offer_answer_options->use_rtp_mux = value; |
| } |
| if (FindConstraint(constraints, MediaConstraintsInterface::kIceRestart, |
| &value, &mandatory_constraints_satisfied)) { |
| offer_answer_options->ice_restart = value; |
| } |
| |
| int layers; |
| if (FindConstraint(constraints, |
| MediaConstraintsInterface::kNumSimulcastLayers, |
| &layers, &mandatory_constraints_satisfied)) { |
| offer_answer_options->num_simulcast_layers = layers; |
| } |
| |
| return mandatory_constraints_satisfied == constraints->GetMandatory().size(); |
| } |
| |
| } // namespace webrtc |
