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/*
* Copyright 2024 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 MEDIA_BASE_CODEC_COMPARATORS_H_
#define MEDIA_BASE_CODEC_COMPARATORS_H_
#include <optional>
#include <vector>
#include "api/rtp_parameters.h"
#include "media/base/codec.h"
namespace webrtc {
// Comparison used in the PayloadTypePicker
bool MatchesForSdp(const cricket::Codec& codec_1,
const cricket::Codec& codec_2);
// Comparison used for the Codec::Matches function
bool MatchesWithCodecRules(const cricket::Codec& left_codec,
const cricket::Codec& codec);
// Finds a codec in `codecs2` that matches `codec_to_match`, which is
// a member of `codecs1`. If `codec_to_match` is an RED or RTX codec, both
// the codecs themselves and their associated codecs must match.
// The purpose of this function is that codecs1 and codecs2 are different
// PT numbering spaces, and it is trying to find the codec in codecs2
// that has the same functionality as `codec_to_match` so that its PT
// can be used in place of the original.
std::optional<cricket::Codec> FindMatchingCodec(
const std::vector<cricket::Codec>& codecs1,
const std::vector<cricket::Codec>& codecs2,
const cricket::Codec& codec_to_match);
// Similar to `Codec::MatchesRtpCodec` but not an exact match of parameters.
// Unspecified parameters are treated as default.
bool IsSameRtpCodec(const cricket::Codec& codec, const RtpCodec& rtp_codec);
// Similar to `IsSameRtpCodec` but ignoring the level related parameter.
bool IsSameRtpCodecIgnoringLevel(const cricket::Codec& codec,
const RtpCodec& rtp_codec);
} // namespace webrtc
#endif // MEDIA_BASE_CODEC_COMPARATORS_H_