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Diffstat (limited to 'media/webrtc/signaling/src/jsep/JsepCodecDescription.h')
| -rw-r--r-- | media/webrtc/signaling/src/jsep/JsepCodecDescription.h | 780 |
1 files changed, 780 insertions, 0 deletions
diff --git a/media/webrtc/signaling/src/jsep/JsepCodecDescription.h b/media/webrtc/signaling/src/jsep/JsepCodecDescription.h new file mode 100644 index 000000000..6ae5c9380 --- /dev/null +++ b/media/webrtc/signaling/src/jsep/JsepCodecDescription.h @@ -0,0 +1,780 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef _JSEPCODECDESCRIPTION_H_ +#define _JSEPCODECDESCRIPTION_H_ + +#include <string> +#include "signaling/src/sdp/SdpMediaSection.h" +#include "signaling/src/sdp/SdpHelper.h" +#include "nsCRT.h" + +namespace mozilla { + +#define JSEP_CODEC_CLONE(T) \ + virtual JsepCodecDescription* Clone() const override \ + { \ + return new T(*this); \ + } + +// A single entry in our list of known codecs. +class JsepCodecDescription { + public: + JsepCodecDescription(mozilla::SdpMediaSection::MediaType type, + const std::string& defaultPt, + const std::string& name, + uint32_t clock, + uint32_t channels, + bool enabled) + : mType(type), + mDefaultPt(defaultPt), + mName(name), + mClock(clock), + mChannels(channels), + mEnabled(enabled), + mStronglyPreferred(false), + mDirection(sdp::kSend) + { + } + virtual ~JsepCodecDescription() {} + + virtual JsepCodecDescription* Clone() const = 0; + + bool + GetPtAsInt(uint16_t* ptOutparam) const + { + return SdpHelper::GetPtAsInt(mDefaultPt, ptOutparam); + } + + virtual bool + Matches(const std::string& fmt, const SdpMediaSection& remoteMsection) const + { + // note: fmt here is remote fmt (to go with remoteMsection) + if (mType != remoteMsection.GetMediaType()) { + return false; + } + + const SdpRtpmapAttributeList::Rtpmap* entry(remoteMsection.FindRtpmap(fmt)); + + if (entry) { + if (!nsCRT::strcasecmp(mName.c_str(), entry->name.c_str()) + && (mClock == entry->clock) + && (mChannels == entry->channels)) { + return ParametersMatch(fmt, remoteMsection); + } + } else if (!fmt.compare("9") && mName == "G722") { + return true; + } else if (!fmt.compare("0") && mName == "PCMU") { + return true; + } else if (!fmt.compare("8") && mName == "PCMA") { + return true; + } + return false; + } + + virtual bool + ParametersMatch(const std::string& fmt, + const SdpMediaSection& remoteMsection) const + { + return true; + } + + virtual bool + Negotiate(const std::string& pt, const SdpMediaSection& remoteMsection) + { + mDefaultPt = pt; + return true; + } + + virtual void + AddToMediaSection(SdpMediaSection& msection) const + { + if (mEnabled && msection.GetMediaType() == mType) { + // Both send and recv codec will have the same pt, so don't add twice + if (!msection.HasFormat(mDefaultPt)) { + if (mType == SdpMediaSection::kApplication) { + // Hack: using mChannels for number of streams + msection.AddDataChannel(mDefaultPt, mName, mChannels); + } else { + msection.AddCodec(mDefaultPt, mName, mClock, mChannels); + } + } + + AddParametersToMSection(msection); + } + } + + virtual void AddParametersToMSection(SdpMediaSection& msection) const {} + + mozilla::SdpMediaSection::MediaType mType; + std::string mDefaultPt; + std::string mName; + uint32_t mClock; + uint32_t mChannels; + bool mEnabled; + bool mStronglyPreferred; + sdp::Direction mDirection; + // Will hold constraints from both fmtp and rid + EncodingConstraints mConstraints; +}; + +class JsepAudioCodecDescription : public JsepCodecDescription { + public: + JsepAudioCodecDescription(const std::string& defaultPt, + const std::string& name, + uint32_t clock, + uint32_t channels, + uint32_t packetSize, + uint32_t bitRate, + bool enabled = true) + : JsepCodecDescription(mozilla::SdpMediaSection::kAudio, defaultPt, name, + clock, channels, enabled), + mPacketSize(packetSize), + mBitrate(bitRate), + mMaxPlaybackRate(0), + mForceMono(false), + mFECEnabled(false), + mDtmfEnabled(false) + { + } + + JSEP_CODEC_CLONE(JsepAudioCodecDescription) + + SdpFmtpAttributeList::OpusParameters + GetOpusParameters(const std::string& pt, + const SdpMediaSection& msection) const + { + // Will contain defaults if nothing else + SdpFmtpAttributeList::OpusParameters result; + auto* params = msection.FindFmtp(pt); + + if (params && params->codec_type == SdpRtpmapAttributeList::kOpus) { + result = + static_cast<const SdpFmtpAttributeList::OpusParameters&>(*params); + } + + return result; + } + + SdpFmtpAttributeList::TelephoneEventParameters + GetTelephoneEventParameters(const std::string& pt, + const SdpMediaSection& msection) const + { + // Will contain defaults if nothing else + SdpFmtpAttributeList::TelephoneEventParameters result; + auto* params = msection.FindFmtp(pt); + + if (params && params->codec_type == SdpRtpmapAttributeList::kTelephoneEvent) { + result = + static_cast<const SdpFmtpAttributeList::TelephoneEventParameters&> + (*params); + } + + return result; + } + + void + AddParametersToMSection(SdpMediaSection& msection) const override + { + if (mDirection == sdp::kSend) { + return; + } + + if (mName == "opus") { + SdpFmtpAttributeList::OpusParameters opusParams( + GetOpusParameters(mDefaultPt, msection)); + if (mMaxPlaybackRate) { + opusParams.maxplaybackrate = mMaxPlaybackRate; + } + if (mChannels == 2 && !mForceMono) { + // We prefer to receive stereo, if available. + opusParams.stereo = 1; + } + opusParams.useInBandFec = mFECEnabled ? 1 : 0; + msection.SetFmtp(SdpFmtpAttributeList::Fmtp(mDefaultPt, opusParams)); + } else if (mName == "telephone-event") { + // add the default dtmf tones + SdpFmtpAttributeList::TelephoneEventParameters teParams( + GetTelephoneEventParameters(mDefaultPt, msection)); + msection.SetFmtp(SdpFmtpAttributeList::Fmtp(mDefaultPt, teParams)); + } + } + + bool + Negotiate(const std::string& pt, + const SdpMediaSection& remoteMsection) override + { + JsepCodecDescription::Negotiate(pt, remoteMsection); + if (mName == "opus" && mDirection == sdp::kSend) { + SdpFmtpAttributeList::OpusParameters opusParams( + GetOpusParameters(mDefaultPt, remoteMsection)); + + mMaxPlaybackRate = opusParams.maxplaybackrate; + mForceMono = !opusParams.stereo; + // draft-ietf-rtcweb-fec-03.txt section 4.2 says support for FEC + // at the received side is declarative and can be negotiated + // separately for either media direction. + mFECEnabled = opusParams.useInBandFec; + } + + return true; + } + + uint32_t mPacketSize; + uint32_t mBitrate; + uint32_t mMaxPlaybackRate; + bool mForceMono; + bool mFECEnabled; + bool mDtmfEnabled; +}; + +class JsepVideoCodecDescription : public JsepCodecDescription { + public: + JsepVideoCodecDescription(const std::string& defaultPt, + const std::string& name, + uint32_t clock, + bool enabled = true) + : JsepCodecDescription(mozilla::SdpMediaSection::kVideo, defaultPt, name, + clock, 0, enabled), + mTmmbrEnabled(false), + mRembEnabled(false), + mFECEnabled(false), + mPacketizationMode(0) + { + // Add supported rtcp-fb types + mNackFbTypes.push_back(""); + mNackFbTypes.push_back(SdpRtcpFbAttributeList::pli); + mCcmFbTypes.push_back(SdpRtcpFbAttributeList::fir); + } + + virtual void + EnableTmmbr() { + // EnableTmmbr can be called multiple times due to multiple calls to + // PeerConnectionImpl::ConfigureJsepSessionCodecs + if (!mTmmbrEnabled) { + mTmmbrEnabled = true; + mCcmFbTypes.push_back(SdpRtcpFbAttributeList::tmmbr); + } + } + + virtual void + EnableRemb() { + // EnableRemb can be called multiple times due to multiple calls to + // PeerConnectionImpl::ConfigureJsepSessionCodecs + if (!mRembEnabled) { + mRembEnabled = true; + mOtherFbTypes.push_back({ "", SdpRtcpFbAttributeList::kRemb, "", ""}); + } + } + + virtual void + EnableFec() { + // Enabling FEC for video works a little differently than enabling + // REMB or TMMBR. Support for FEC is indicated by the presence of + // particular codes (red and ulpfec) instead of using rtcpfb + // attributes on a given codec. There is no rtcpfb to push for FEC + // as can be seen above when REMB or TMMBR are enabled. + mFECEnabled = true; + } + + void + AddParametersToMSection(SdpMediaSection& msection) const override + { + AddFmtpsToMSection(msection); + AddRtcpFbsToMSection(msection); + } + + void + AddFmtpsToMSection(SdpMediaSection& msection) const + { + if (mName == "H264") { + SdpFmtpAttributeList::H264Parameters h264Params( + GetH264Parameters(mDefaultPt, msection)); + + if (mDirection == sdp::kSend) { + if (!h264Params.level_asymmetry_allowed) { + // First time the fmtp has been set; set just in case this is for a + // sendonly m-line, since even though we aren't receiving the level + // negotiation still needs to happen (sigh). + h264Params.profile_level_id = mProfileLevelId; + } + } else { + // Parameters that only apply to what we receive + h264Params.max_mbps = mConstraints.maxMbps; + h264Params.max_fs = mConstraints.maxFs; + h264Params.max_cpb = mConstraints.maxCpb; + h264Params.max_dpb = mConstraints.maxDpb; + h264Params.max_br = mConstraints.maxBr; + strncpy(h264Params.sprop_parameter_sets, + mSpropParameterSets.c_str(), + sizeof(h264Params.sprop_parameter_sets) - 1); + h264Params.profile_level_id = mProfileLevelId; + } + + // Parameters that apply to both the send and recv directions + h264Params.packetization_mode = mPacketizationMode; + // Hard-coded, may need to change someday? + h264Params.level_asymmetry_allowed = true; + + msection.SetFmtp(SdpFmtpAttributeList::Fmtp(mDefaultPt, h264Params)); + } else if (mName == "red") { + SdpFmtpAttributeList::RedParameters redParams( + GetRedParameters(mDefaultPt, msection)); + redParams.encodings = mRedundantEncodings; + msection.SetFmtp(SdpFmtpAttributeList::Fmtp(mDefaultPt, redParams)); + } else if (mName == "VP8" || mName == "VP9") { + if (mDirection == sdp::kRecv) { + // VP8 and VP9 share the same SDP parameters thus far + SdpFmtpAttributeList::VP8Parameters vp8Params( + GetVP8Parameters(mDefaultPt, msection)); + + vp8Params.max_fs = mConstraints.maxFs; + vp8Params.max_fr = mConstraints.maxFps; + msection.SetFmtp(SdpFmtpAttributeList::Fmtp(mDefaultPt, vp8Params)); + } + } + } + + void + AddRtcpFbsToMSection(SdpMediaSection& msection) const + { + SdpRtcpFbAttributeList rtcpfbs(msection.GetRtcpFbs()); + for (const auto& rtcpfb : rtcpfbs.mFeedbacks) { + if (rtcpfb.pt == mDefaultPt) { + // Already set by the codec for the other direction. + return; + } + } + + for (const std::string& type : mAckFbTypes) { + rtcpfbs.PushEntry(mDefaultPt, SdpRtcpFbAttributeList::kAck, type); + } + for (const std::string& type : mNackFbTypes) { + rtcpfbs.PushEntry(mDefaultPt, SdpRtcpFbAttributeList::kNack, type); + } + for (const std::string& type : mCcmFbTypes) { + rtcpfbs.PushEntry(mDefaultPt, SdpRtcpFbAttributeList::kCcm, type); + } + for (const auto& fb : mOtherFbTypes) { + rtcpfbs.PushEntry(mDefaultPt, fb.type, fb.parameter, fb.extra); + } + + msection.SetRtcpFbs(rtcpfbs); + } + + SdpFmtpAttributeList::H264Parameters + GetH264Parameters(const std::string& pt, + const SdpMediaSection& msection) const + { + // Will contain defaults if nothing else + SdpFmtpAttributeList::H264Parameters result; + auto* params = msection.FindFmtp(pt); + + if (params && params->codec_type == SdpRtpmapAttributeList::kH264) { + result = + static_cast<const SdpFmtpAttributeList::H264Parameters&>(*params); + } + + return result; + } + + SdpFmtpAttributeList::RedParameters + GetRedParameters(const std::string& pt, + const SdpMediaSection& msection) const + { + SdpFmtpAttributeList::RedParameters result; + auto* params = msection.FindFmtp(pt); + + if (params && params->codec_type == SdpRtpmapAttributeList::kRed) { + result = + static_cast<const SdpFmtpAttributeList::RedParameters&>(*params); + } + + return result; + } + + SdpFmtpAttributeList::VP8Parameters + GetVP8Parameters(const std::string& pt, + const SdpMediaSection& msection) const + { + SdpRtpmapAttributeList::CodecType expectedType( + mName == "VP8" ? + SdpRtpmapAttributeList::kVP8 : + SdpRtpmapAttributeList::kVP9); + + // Will contain defaults if nothing else + SdpFmtpAttributeList::VP8Parameters result(expectedType); + auto* params = msection.FindFmtp(pt); + + if (params && params->codec_type == expectedType) { + result = + static_cast<const SdpFmtpAttributeList::VP8Parameters&>(*params); + } + + return result; + } + + void + NegotiateRtcpFb(const SdpMediaSection& remoteMsection, + SdpRtcpFbAttributeList::Type type, + std::vector<std::string>* supportedTypes) + { + std::vector<std::string> temp; + for (auto& subType : *supportedTypes) { + if (remoteMsection.HasRtcpFb(mDefaultPt, type, subType)) { + temp.push_back(subType); + } + } + *supportedTypes = temp; + } + + void + NegotiateRtcpFb(const SdpMediaSection& remoteMsection, + std::vector<SdpRtcpFbAttributeList::Feedback>* supportedFbs) { + std::vector<SdpRtcpFbAttributeList::Feedback> temp; + for (auto& fb : *supportedFbs) { + if (remoteMsection.HasRtcpFb(mDefaultPt, fb.type, fb.parameter)) { + temp.push_back(fb); + } + } + *supportedFbs = temp; + } + + void + NegotiateRtcpFb(const SdpMediaSection& remote) + { + // Removes rtcp-fb types that the other side doesn't support + NegotiateRtcpFb(remote, SdpRtcpFbAttributeList::kAck, &mAckFbTypes); + NegotiateRtcpFb(remote, SdpRtcpFbAttributeList::kNack, &mNackFbTypes); + NegotiateRtcpFb(remote, SdpRtcpFbAttributeList::kCcm, &mCcmFbTypes); + NegotiateRtcpFb(remote, &mOtherFbTypes); + } + + virtual bool + Negotiate(const std::string& pt, + const SdpMediaSection& remoteMsection) override + { + JsepCodecDescription::Negotiate(pt, remoteMsection); + if (mName == "H264") { + SdpFmtpAttributeList::H264Parameters h264Params( + GetH264Parameters(mDefaultPt, remoteMsection)); + + // Level is negotiated symmetrically if level asymmetry is disallowed + if (!h264Params.level_asymmetry_allowed) { + SetSaneH264Level(std::min(GetSaneH264Level(h264Params.profile_level_id), + GetSaneH264Level(mProfileLevelId)), + &mProfileLevelId); + } + + if (mDirection == sdp::kSend) { + // Remote values of these apply only to the send codec. + mConstraints.maxFs = h264Params.max_fs; + mConstraints.maxMbps = h264Params.max_mbps; + mConstraints.maxCpb = h264Params.max_cpb; + mConstraints.maxDpb = h264Params.max_dpb; + mConstraints.maxBr = h264Params.max_br; + mSpropParameterSets = h264Params.sprop_parameter_sets; + // Only do this if we didn't symmetrically negotiate above + if (h264Params.level_asymmetry_allowed) { + SetSaneH264Level(GetSaneH264Level(h264Params.profile_level_id), + &mProfileLevelId); + } + } else { + // TODO(bug 1143709): max-recv-level support + } + } else if (mName == "red") { + SdpFmtpAttributeList::RedParameters redParams( + GetRedParameters(mDefaultPt, remoteMsection)); + mRedundantEncodings = redParams.encodings; + } else if (mName == "VP8" || mName == "VP9") { + if (mDirection == sdp::kSend) { + SdpFmtpAttributeList::VP8Parameters vp8Params( + GetVP8Parameters(mDefaultPt, remoteMsection)); + + mConstraints.maxFs = vp8Params.max_fs; + mConstraints.maxFps = vp8Params.max_fr; + } + } + + NegotiateRtcpFb(remoteMsection); + return true; + } + + // Maps the not-so-sane encoding of H264 level into something that is + // ordered in the way one would expect + // 1b is 0xAB, everything else is the level left-shifted one half-byte + // (eg; 1.0 is 0xA0, 1.1 is 0xB0, 3.1 is 0x1F0) + static uint32_t + GetSaneH264Level(uint32_t profileLevelId) + { + uint32_t profileIdc = (profileLevelId >> 16); + + if (profileIdc == 0x42 || profileIdc == 0x4D || profileIdc == 0x58) { + if ((profileLevelId & 0x10FF) == 0x100B) { + // Level 1b + return 0xAB; + } + } + + uint32_t level = profileLevelId & 0xFF; + + if (level == 0x09) { + // Another way to encode level 1b + return 0xAB; + } + + return level << 4; + } + + static void + SetSaneH264Level(uint32_t level, uint32_t* profileLevelId) + { + uint32_t profileIdc = (*profileLevelId >> 16); + uint32_t levelMask = 0xFF; + + if (profileIdc == 0x42 || profileIdc == 0x4d || profileIdc == 0x58) { + levelMask = 0x10FF; + if (level == 0xAB) { + // Level 1b + level = 0x100B; + } else { + // Not 1b, just shift + level = level >> 4; + } + } else if (level == 0xAB) { + // Another way to encode 1b + level = 0x09; + } else { + // Not 1b, just shift + level = level >> 4; + } + + *profileLevelId = (*profileLevelId & ~levelMask) | level; + } + + enum Subprofile { + kH264ConstrainedBaseline, + kH264Baseline, + kH264Main, + kH264Extended, + kH264High, + kH264High10, + kH264High42, + kH264High44, + kH264High10I, + kH264High42I, + kH264High44I, + kH264CALVC44, + kH264UnknownSubprofile + }; + + static Subprofile + GetSubprofile(uint32_t profileLevelId) + { + // Based on Table 5 from RFC 6184: + // Profile profile_idc profile-iop + // (hexadecimal) (binary) + + // CB 42 (B) x1xx0000 + // same as: 4D (M) 1xxx0000 + // same as: 58 (E) 11xx0000 + // B 42 (B) x0xx0000 + // same as: 58 (E) 10xx0000 + // M 4D (M) 0x0x0000 + // E 58 00xx0000 + // H 64 00000000 + // H10 6E 00000000 + // H42 7A 00000000 + // H44 F4 00000000 + // H10I 6E 00010000 + // H42I 7A 00010000 + // H44I F4 00010000 + // C44I 2C 00010000 + + if ((profileLevelId & 0xFF4F00) == 0x424000) { + // 01001111 (mask, 0x4F) + // x1xx0000 (from table) + // 01000000 (expected value, 0x40) + return kH264ConstrainedBaseline; + } + + if ((profileLevelId & 0xFF8F00) == 0x4D8000) { + // 10001111 (mask, 0x8F) + // 1xxx0000 (from table) + // 10000000 (expected value, 0x80) + return kH264ConstrainedBaseline; + } + + if ((profileLevelId & 0xFFCF00) == 0x58C000) { + // 11001111 (mask, 0xCF) + // 11xx0000 (from table) + // 11000000 (expected value, 0xC0) + return kH264ConstrainedBaseline; + } + + if ((profileLevelId & 0xFF4F00) == 0x420000) { + // 01001111 (mask, 0x4F) + // x0xx0000 (from table) + // 00000000 (expected value) + return kH264Baseline; + } + + if ((profileLevelId & 0xFFCF00) == 0x588000) { + // 11001111 (mask, 0xCF) + // 10xx0000 (from table) + // 10000000 (expected value, 0x80) + return kH264Baseline; + } + + if ((profileLevelId & 0xFFAF00) == 0x4D0000) { + // 10101111 (mask, 0xAF) + // 0x0x0000 (from table) + // 00000000 (expected value) + return kH264Main; + } + + if ((profileLevelId & 0xFF0000) == 0x580000) { + // 11001111 (mask, 0xCF) + // 00xx0000 (from table) + // 00000000 (expected value) + return kH264Extended; + } + + if ((profileLevelId & 0xFFFF00) == 0x640000) { + return kH264High; + } + + if ((profileLevelId & 0xFFFF00) == 0x6E0000) { + return kH264High10; + } + + if ((profileLevelId & 0xFFFF00) == 0x7A0000) { + return kH264High42; + } + + if ((profileLevelId & 0xFFFF00) == 0xF40000) { + return kH264High44; + } + + if ((profileLevelId & 0xFFFF00) == 0x6E1000) { + return kH264High10I; + } + + if ((profileLevelId & 0xFFFF00) == 0x7A1000) { + return kH264High42I; + } + + if ((profileLevelId & 0xFFFF00) == 0xF41000) { + return kH264High44I; + } + + if ((profileLevelId & 0xFFFF00) == 0x2C1000) { + return kH264CALVC44; + } + + return kH264UnknownSubprofile; + } + + virtual bool + ParametersMatch(const std::string& fmt, + const SdpMediaSection& remoteMsection) const override + { + if (mName == "H264") { + SdpFmtpAttributeList::H264Parameters h264Params( + GetH264Parameters(fmt, remoteMsection)); + + if (h264Params.packetization_mode != mPacketizationMode) { + return false; + } + + if (GetSubprofile(h264Params.profile_level_id) != + GetSubprofile(mProfileLevelId)) { + return false; + } + } + + return true; + } + + virtual bool + RtcpFbRembIsSet() const + { + for (const auto& fb : mOtherFbTypes) { + if (fb.type == SdpRtcpFbAttributeList::kRemb) { + return true; + } + } + return false; + } + + virtual void + UpdateRedundantEncodings(std::vector<JsepCodecDescription*> codecs) + { + for (const auto codec : codecs) { + if (codec->mType == SdpMediaSection::kVideo && + codec->mEnabled && + codec->mName != "red") { + uint8_t pt = (uint8_t)strtoul(codec->mDefaultPt.c_str(), nullptr, 10); + // returns 0 if failed to convert, and since zero could + // be valid, check the defaultPt for 0 + if (pt == 0 && codec->mDefaultPt != "0") { + continue; + } + mRedundantEncodings.push_back(pt); + } + } + } + + JSEP_CODEC_CLONE(JsepVideoCodecDescription) + + std::vector<std::string> mAckFbTypes; + std::vector<std::string> mNackFbTypes; + std::vector<std::string> mCcmFbTypes; + std::vector<SdpRtcpFbAttributeList::Feedback> mOtherFbTypes; + bool mTmmbrEnabled; + bool mRembEnabled; + bool mFECEnabled; + std::vector<uint8_t> mRedundantEncodings; + + // H264-specific stuff + uint32_t mProfileLevelId; + uint32_t mPacketizationMode; + std::string mSpropParameterSets; +}; + +class JsepApplicationCodecDescription : public JsepCodecDescription { + public: + JsepApplicationCodecDescription(const std::string& defaultPt, + const std::string& name, + uint16_t channels, + bool enabled = true) + : JsepCodecDescription(mozilla::SdpMediaSection::kApplication, defaultPt, + name, 0, channels, enabled) + { + } + + JSEP_CODEC_CLONE(JsepApplicationCodecDescription) + + // Override, uses sctpmap instead of rtpmap + virtual bool + Matches(const std::string& fmt, + const SdpMediaSection& remoteMsection) const override + { + if (mType != remoteMsection.GetMediaType()) { + return false; + } + + const SdpSctpmapAttributeList::Sctpmap* entry( + remoteMsection.FindSctpmap(fmt)); + + if (entry && !nsCRT::strcasecmp(mName.c_str(), entry->name.c_str())) { + return true; + } + return false; + } +}; + +} // namespace mozilla + +#endif |