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/* 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 _JSEPSESSION_H_
#define _JSEPSESSION_H_
#include <string>
#include <vector>
#include "mozilla/Maybe.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtr.h"
#include "nsError.h"
#include "signaling/src/jsep/JsepTransport.h"
#include "signaling/src/sdp/Sdp.h"
#include "JsepTrack.h"
namespace mozilla {
// Forward declarations
class JsepCodecDescription;
class JsepTrack;
enum JsepSignalingState {
kJsepStateStable,
kJsepStateHaveLocalOffer,
kJsepStateHaveRemoteOffer,
kJsepStateHaveLocalPranswer,
kJsepStateHaveRemotePranswer,
kJsepStateClosed
};
enum JsepSdpType {
kJsepSdpOffer,
kJsepSdpAnswer,
kJsepSdpPranswer,
kJsepSdpRollback
};
struct JsepOAOptions {};
struct JsepOfferOptions : public JsepOAOptions {
Maybe<size_t> mOfferToReceiveAudio;
Maybe<size_t> mOfferToReceiveVideo;
Maybe<bool> mDontOfferDataChannel;
Maybe<bool> mIceRestart; // currently ignored by JsepSession
};
struct JsepAnswerOptions : public JsepOAOptions {};
enum JsepBundlePolicy {
kBundleBalanced,
kBundleMaxCompat,
kBundleMaxBundle
};
class JsepSession
{
public:
explicit JsepSession(const std::string& name)
: mName(name), mState(kJsepStateStable), mNegotiations(0)
{
}
virtual ~JsepSession() {}
virtual nsresult Init() = 0;
// Accessors for basic properties.
virtual const std::string&
GetName() const
{
return mName;
}
virtual JsepSignalingState
GetState() const
{
return mState;
}
virtual uint32_t
GetNegotiations() const
{
return mNegotiations;
}
// Set up the ICE And DTLS data.
virtual nsresult SetIceCredentials(const std::string& ufrag,
const std::string& pwd) = 0;
virtual const std::string& GetUfrag() const = 0;
virtual const std::string& GetPwd() const = 0;
virtual nsresult SetBundlePolicy(JsepBundlePolicy policy) = 0;
virtual bool RemoteIsIceLite() const = 0;
virtual bool RemoteIceIsRestarting() const = 0;
virtual std::vector<std::string> GetIceOptions() const = 0;
virtual nsresult AddDtlsFingerprint(const std::string& algorithm,
const std::vector<uint8_t>& value) = 0;
virtual nsresult AddAudioRtpExtension(const std::string& extensionName,
SdpDirectionAttribute::Direction direction) = 0;
virtual nsresult AddVideoRtpExtension(const std::string& extensionName,
SdpDirectionAttribute::Direction direction) = 0;
// Kinda gross to be locking down the data structure type like this, but
// returning by value is problematic due to the lack of stl move semantics in
// our build config, since we can't use UniquePtr in the container. The
// alternative is writing a raft of accessor functions that allow arbitrary
// manipulation (which will be unwieldy), or allowing functors to be injected
// that manipulate the data structure (still pretty unwieldy).
virtual std::vector<JsepCodecDescription*>& Codecs() = 0;
template <class UnaryFunction>
void ForEachCodec(UnaryFunction& function)
{
std::for_each(Codecs().begin(), Codecs().end(), function);
for (RefPtr<JsepTrack>& track : GetLocalTracks()) {
track->ForEachCodec(function);
}
for (RefPtr<JsepTrack>& track : GetRemoteTracks()) {
track->ForEachCodec(function);
}
}
template <class BinaryPredicate>
void SortCodecs(BinaryPredicate& sorter)
{
std::stable_sort(Codecs().begin(), Codecs().end(), sorter);
for (RefPtr<JsepTrack>& track : GetLocalTracks()) {
track->SortCodecs(sorter);
}
for (RefPtr<JsepTrack>& track : GetRemoteTracks()) {
track->SortCodecs(sorter);
}
}
// Manage tracks. We take shared ownership of any track.
virtual nsresult AddTrack(const RefPtr<JsepTrack>& track) = 0;
virtual nsresult RemoveTrack(const std::string& streamId,
const std::string& trackId) = 0;
virtual nsresult ReplaceTrack(const std::string& oldStreamId,
const std::string& oldTrackId,
const std::string& newStreamId,
const std::string& newTrackId) = 0;
virtual nsresult SetParameters(
const std::string& streamId,
const std::string& trackId,
const std::vector<JsepTrack::JsConstraints>& constraints) = 0;
virtual nsresult GetParameters(
const std::string& streamId,
const std::string& trackId,
std::vector<JsepTrack::JsConstraints>* outConstraints) = 0;
virtual std::vector<RefPtr<JsepTrack>> GetLocalTracks() const = 0;
virtual std::vector<RefPtr<JsepTrack>> GetRemoteTracks() const = 0;
virtual std::vector<RefPtr<JsepTrack>> GetRemoteTracksAdded() const = 0;
virtual std::vector<RefPtr<JsepTrack>> GetRemoteTracksRemoved() const = 0;
// Access the negotiated track pairs.
virtual std::vector<JsepTrackPair> GetNegotiatedTrackPairs() const = 0;
// Access transports.
virtual std::vector<RefPtr<JsepTransport>> GetTransports() const = 0;
// Basic JSEP operations.
virtual nsresult CreateOffer(const JsepOfferOptions& options,
std::string* offer) = 0;
virtual nsresult CreateAnswer(const JsepAnswerOptions& options,
std::string* answer) = 0;
virtual std::string GetLocalDescription() const = 0;
virtual std::string GetRemoteDescription() const = 0;
virtual nsresult SetLocalDescription(JsepSdpType type,
const std::string& sdp) = 0;
virtual nsresult SetRemoteDescription(JsepSdpType type,
const std::string& sdp) = 0;
virtual nsresult AddRemoteIceCandidate(const std::string& candidate,
const std::string& mid,
uint16_t level) = 0;
virtual nsresult AddLocalIceCandidate(const std::string& candidate,
uint16_t level,
std::string* mid,
bool* skipped) = 0;
virtual nsresult UpdateDefaultCandidate(
const std::string& defaultCandidateAddr,
uint16_t defaultCandidatePort,
const std::string& defaultRtcpCandidateAddr,
uint16_t defaultRtcpCandidatePort,
uint16_t level) = 0;
virtual nsresult EndOfLocalCandidates(uint16_t level) = 0;
virtual nsresult Close() = 0;
// ICE controlling or controlled
virtual bool IsIceControlling() const = 0;
virtual const std::string
GetLastError() const
{
return "Error";
}
static const char*
GetStateStr(JsepSignalingState state)
{
static const char* states[] = { "stable", "have-local-offer",
"have-remote-offer", "have-local-pranswer",
"have-remote-pranswer", "closed" };
return states[state];
}
virtual bool AllLocalTracksAreAssigned() const = 0;
void
CountTracks(uint16_t (&receiving)[SdpMediaSection::kMediaTypes],
uint16_t (&sending)[SdpMediaSection::kMediaTypes]) const
{
auto trackPairs = GetNegotiatedTrackPairs();
memset(receiving, 0, sizeof(receiving));
memset(sending, 0, sizeof(sending));
for (auto& pair : trackPairs) {
if (pair.mReceiving) {
receiving[pair.mReceiving->GetMediaType()]++;
}
if (pair.mSending) {
sending[pair.mSending->GetMediaType()]++;
}
}
}
protected:
const std::string mName;
JsepSignalingState mState;
uint32_t mNegotiations;
};
} // namespace mozilla
#endif
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