Repo created

TMessagesProj/jni/voip/webrtc/pc/rtp_parameters_conversion.h

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