106 lines
4.1 KiB
C++
106 lines
4.1 KiB
C++
/*
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* Copyright 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef PC_RTP_PARAMETERS_CONVERSION_H_
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#define PC_RTP_PARAMETERS_CONVERSION_H_
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#include <iosfwd>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/rtc_error.h"
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#include "api/rtp_parameters.h"
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#include "media/base/codec.h"
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#include "media/base/stream_params.h"
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#include "pc/session_description.h"
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namespace webrtc {
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// NOTE: Some functions are templated for convenience, such that template-based
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// code dealing with AudioContentDescription and VideoContentDescription can
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// use this easily. Such methods are usable with cricket::AudioCodec and
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// cricket::VideoCodec.
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//***************************************************************************
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// Functions for converting from new webrtc:: structures to old cricket::
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// structures.
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//
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// As the return values imply, all of these functions do validation of the
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// parameters and return an error if they're invalid. It's expected that any
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// default values (such as video clock rate of 90000) have been filled by the
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// time the webrtc:: structure is being converted to the cricket:: one.
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//
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// These are expected to be used when parameters are passed into an RtpSender
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// or RtpReceiver, and need to be validated and converted so they can be
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// applied to the media engine level.
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//***************************************************************************
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// Returns error on invalid input. Certain message types are only valid for
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// certain feedback types.
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RTCErrorOr<cricket::FeedbackParam> ToCricketFeedbackParam(
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const RtcpFeedback& feedback);
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// Verifies that the codec kind is correct, and it has mandatory parameters
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// filled, with values in valid ranges.
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template <typename C>
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RTCErrorOr<C> ToCricketCodec(const RtpCodecParameters& codec);
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// Verifies that payload types aren't duplicated, in addition to normal
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// validation.
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template <typename C>
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RTCErrorOr<std::vector<C>> ToCricketCodecs(
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const std::vector<RtpCodecParameters>& codecs);
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// SSRCs are allowed to be ommitted. This may be used for receive parameters
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// where SSRCs are unsignaled.
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RTCErrorOr<cricket::StreamParamsVec> ToCricketStreamParamsVec(
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const std::vector<RtpEncodingParameters>& encodings);
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//*****************************************************************************
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// Functions for converting from old cricket:: structures to new webrtc::
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// structures. Unlike the above functions, these are permissive with regards to
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// input validation; it's assumed that any necessary validation already
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// occurred.
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//
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// These are expected to be used either to convert from audio/video engine
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// capabilities to RtpCapabilities, or to convert from already-parsed SDP
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// (in the form of cricket:: structures) to webrtc:: structures. The latter
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// functionality is not yet implemented.
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//*****************************************************************************
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// Returns empty value if |cricket_feedback| is a feedback type not
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// supported/recognized.
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absl::optional<RtcpFeedback> ToRtcpFeedback(
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const cricket::FeedbackParam& cricket_feedback);
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std::vector<RtpEncodingParameters> ToRtpEncodings(
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const cricket::StreamParamsVec& stream_params);
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template <typename C>
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RtpCodecParameters ToRtpCodecParameters(const C& cricket_codec);
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template <typename C>
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RtpCodecCapability ToRtpCodecCapability(const C& cricket_codec);
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template <class C>
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RtpCapabilities ToRtpCapabilities(
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const std::vector<C>& cricket_codecs,
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const cricket::RtpHeaderExtensions& cricket_extensions);
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template <class C>
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RtpParameters ToRtpParameters(
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const std::vector<C>& cricket_codecs,
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const cricket::RtpHeaderExtensions& cricket_extensions,
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const cricket::StreamParamsVec& stream_params);
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} // namespace webrtc
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#endif // PC_RTP_PARAMETERS_CONVERSION_H_
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