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/*
* libjingle
* Copyright 2013, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the interface for MediaConstraints, corresponding to
// the definition at
// http://www.w3.org/TR/mediacapture-streams/#mediastreamconstraints and also
// used in WebRTC: http://dev.w3.org/2011/webrtc/editor/webrtc.html#constraints.
#ifndef TALK_APP_WEBRTC_MEDIACONSTRAINTSINTERFACE_H_
#define TALK_APP_WEBRTC_MEDIACONSTRAINTSINTERFACE_H_
#include <string>
#include <vector>
namespace webrtc {
// MediaConstraintsInterface
// Interface used for passing arguments about media constraints
// to the MediaStream and PeerConnection implementation.
class MediaConstraintsInterface {
public:
struct Constraint {
Constraint() {}
Constraint(const std::string& key, const std::string value)
: key(key), value(value) {
}
std::string key;
std::string value;
};
class Constraints : public std::vector<Constraint> {
public:
bool FindFirst(const std::string& key, std::string* value) const;
};
virtual const Constraints& GetMandatory() const = 0;
virtual const Constraints& GetOptional() const = 0;
// Constraint keys used by a local video source.
// Specified by draft-alvestrand-constraints-resolution-00b
static const char kMinAspectRatio[]; // minAspectRatio
static const char kMaxAspectRatio[]; // maxAspectRatio
static const char kMaxWidth[]; // maxWidth
static const char kMinWidth[]; // minWidth
static const char kMaxHeight[]; // maxHeight
static const char kMinHeight[]; // minHeight
static const char kMaxFrameRate[]; // maxFrameRate
static const char kMinFrameRate[]; // minFrameRate
// Constraint keys used by a local audio source.
// These keys are google specific.
static const char kEchoCancellation[]; // googEchoCancellation
static const char kExperimentalEchoCancellation[]; // googEchoCancellation2
static const char kAutoGainControl[]; // googAutoGainControl
static const char kExperimentalAutoGainControl[]; // googAutoGainControl2
static const char kNoiseSuppression[]; // googNoiseSuppression
static const char kHighpassFilter[]; // googHighpassFilter
static const char kTypingNoiseDetection[]; // googTypingNoiseDetection
static const char kAudioMirroring[]; // googAudioMirroring
// Google-specific constraint keys for a local video source
static const char kNoiseReduction[]; // googNoiseReduction
static const char kLeakyBucket[]; // googLeakyBucket
// googTemporalLayeredScreencast
static const char kTemporalLayeredScreencast[];
static const char kCpuOveruseDetection[];
// Constraint keys for CreateOffer / CreateAnswer
// Specified by the W3C PeerConnection spec
static const char kOfferToReceiveVideo[]; // OfferToReceiveVideo
static const char kOfferToReceiveAudio[]; // OfferToReceiveAudio
static const char kVoiceActivityDetection[]; // VoiceActivityDetection
static const char kIceRestart[]; // IceRestart
// These keys are google specific.
static const char kUseRtpMux[]; // googUseRtpMUX
// Constraints values.
static const char kValueTrue[]; // true
static const char kValueFalse[]; // false
// Temporary pseudo-constraints used to enable DTLS-SRTP
static const char kEnableDtlsSrtp[]; // Enable DTLS-SRTP
// Temporary pseudo-constraints used to enable DataChannels
static const char kEnableRtpDataChannels[]; // Enable RTP DataChannels
// TODO(perkj): Remove kEnableSctpDataChannels once Chrome use
// PeerConnectionFactory::SetOptions.
static const char kEnableSctpDataChannels[]; // Enable SCTP DataChannels
// Temporary pseudo-constraint for enabling DSCP through JS.
static const char kEnableDscp[];
// The prefix of internal-only constraints whose JS set values should be
// stripped by Chrome before passed down to Libjingle.
static const char kInternalConstraintPrefix[];
// These constraints are for internal use only, representing Chrome command
// line flags. So they are prefixed with "internal" so JS values will be
// removed.
// Used by a local audio source.
// TODO(perkj): Remove once Chrome use PeerConnectionFactory::SetOptions.
static const char kInternalAecDump[]; // internalAecDump
protected:
// Dtor protected as objects shouldn't be deleted via this interface
virtual ~MediaConstraintsInterface() {}
};
bool FindConstraint(const MediaConstraintsInterface* constraints,
const std::string& key, bool* value,
size_t* mandatory_constraints);
} // namespace webrtc
#endif // TALK_APP_WEBRTC_MEDIACONSTRAINTSINTERFACE_H_
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