| /* |
| * Copyright (c) 2016 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_ENGINE_PAYLOAD_TYPE_MAPPER_H_ |
| #define MEDIA_ENGINE_PAYLOAD_TYPE_MAPPER_H_ |
| |
| #include <map> |
| #include <set> |
| |
| #include "absl/types/optional.h" |
| #include "api/audio_codecs/audio_format.h" |
| #include "media/base/codec.h" |
| |
| namespace cricket { |
| |
| webrtc::SdpAudioFormat AudioCodecToSdpAudioFormat(const AudioCodec& ac); |
| |
| class PayloadTypeMapper { |
| public: |
| PayloadTypeMapper(); |
| ~PayloadTypeMapper(); |
| |
| // Finds the current payload type for `format` or assigns a new one, if no |
| // current mapping exists. Will return an empty value if it was unable to |
| // create a mapping, i.e. if all dynamic payload type ids have been used up. |
| absl::optional<int> GetMappingFor(const webrtc::SdpAudioFormat& format); |
| |
| // Finds the current payload type for `format`, if any. Returns an empty value |
| // if no payload type mapping exists for the format. |
| absl::optional<int> FindMappingFor( |
| const webrtc::SdpAudioFormat& format) const; |
| |
| // Like GetMappingFor, but fills in an AudioCodec structure with the necessary |
| // information instead. |
| absl::optional<AudioCodec> ToAudioCodec(const webrtc::SdpAudioFormat& format); |
| |
| private: |
| struct SdpAudioFormatOrdering { |
| bool operator()(const webrtc::SdpAudioFormat& a, |
| const webrtc::SdpAudioFormat& b) const; |
| }; |
| |
| int next_unused_payload_type_; |
| int max_payload_type_; |
| std::map<webrtc::SdpAudioFormat, int, SdpAudioFormatOrdering> mappings_; |
| std::set<int> used_payload_types_; |
| }; |
| |
| } // namespace cricket |
| #endif // MEDIA_ENGINE_PAYLOAD_TYPE_MAPPER_H_ |