codec_comparators.h

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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 "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.

std::optional<cricket::Codec> FindMatchingCodec(

    const std::vector<cricket::Codec>& codecs1,

    const std::vector<cricket::Codec>& codecs2,

    const cricket::Codec& codec_to_match);

}  // namespace webrtc

#endif  // MEDIA_BASE_CODEC_COMPARATORS_H_