13170bd177
The new class "CodecVendor" is intended to handle all logic dealing with codecs. This CL is a no-behavior-change CL, later CLs will change the logic. Bug: webrtc:360058654 Change-Id: I44e76f0e0bd364eeb7d4506f3e01e9e00e2843a2 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/375500 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43806}
124 lines
4.6 KiB
C++
124 lines
4.6 KiB
C++
/*
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* Copyright 2025 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_CODEC_VENDOR_H_
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#define PC_CODEC_VENDOR_H_
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#include <vector>
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#include "api/rtc_error.h"
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#include "api/rtp_transceiver_direction.h"
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#include "media/base/codec.h"
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#include "media/base/codec_list.h"
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#include "media/base/media_engine.h"
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#include "pc/media_options.h"
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#include "pc/session_description.h"
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namespace cricket {
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// This class contains the functions required to compute the list of codecs
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// for SDP offer/answer. It is exposed to MediaSessionDescriptionFactory
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// for the construction of offers and answers.
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// TODO: bugs.webrtc.org/360058654 - complete the architectural changes
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// The list of things to be done:
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// - Make as much as possible private.
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// - Split object usage into a video object and an audio object.
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// - Remove audio/video from the call names, merge code where possible.
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// - Make the class instances owned by transceivers, so that codec
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// lists can differ per transceiver.
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// For cleanliness:
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// - Thread guard
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class CodecVendor {
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public:
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CodecVendor(MediaEngineInterface* media_engine, bool rtx_enabled);
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public:
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void GetCodecsForOffer(
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const std::vector<const ContentInfo*>& current_active_contents,
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Codecs* audio_codecs,
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Codecs* video_codecs) const;
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void GetCodecsForAnswer(
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const std::vector<const ContentInfo*>& current_active_contents,
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const SessionDescription& remote_offer,
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Codecs* audio_codecs,
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Codecs* video_codecs) const;
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webrtc::RTCErrorOr<std::vector<Codec>> GetNegotiatedCodecsForOffer(
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const MediaDescriptionOptions& media_description_options,
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const MediaSessionOptions& session_options,
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const ContentInfo* current_content,
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const CodecList& codecs);
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webrtc::RTCErrorOr<Codecs> GetNegotiatedCodecsForAnswer(
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const MediaDescriptionOptions& media_description_options,
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const MediaSessionOptions& session_options,
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webrtc::RtpTransceiverDirection offer_rtd,
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webrtc::RtpTransceiverDirection answer_rtd,
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const ContentInfo* current_content,
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const CodecList& codecs);
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static void NegotiateCodecs(const CodecList& local_codecs,
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const CodecList& offered_codecs,
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std::vector<Codec>* negotiated_codecs,
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bool keep_offer_order);
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// Functions exposed for testing
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void set_audio_codecs(const CodecList& send_codecs,
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const CodecList& recv_codecs);
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void set_audio_codecs(const std::vector<Codec>& send_codecs,
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const std::vector<Codec>& recv_codecs) {
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set_audio_codecs(CodecList(send_codecs), CodecList(recv_codecs));
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}
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void set_video_codecs(const CodecList& send_codecs,
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const CodecList& recv_codecs);
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void set_video_codecs(const std::vector<Codec>& send_codecs,
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const std::vector<Codec>& recv_codecs) {
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set_video_codecs(CodecList(send_codecs), CodecList(recv_codecs));
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}
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const CodecList& audio_sendrecv_codecs() const;
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const CodecList& audio_send_codecs() const;
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const CodecList& audio_recv_codecs() const;
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const CodecList& video_sendrecv_codecs() const;
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const CodecList& video_send_codecs() const;
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const CodecList& video_recv_codecs() const;
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private:
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const CodecList& GetAudioCodecsForOffer(
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const webrtc::RtpTransceiverDirection& direction) const;
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const CodecList& GetAudioCodecsForAnswer(
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const webrtc::RtpTransceiverDirection& offer,
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const webrtc::RtpTransceiverDirection& answer) const;
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const CodecList& GetVideoCodecsForOffer(
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const webrtc::RtpTransceiverDirection& direction) const;
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const CodecList& GetVideoCodecsForAnswer(
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const webrtc::RtpTransceiverDirection& offer,
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const webrtc::RtpTransceiverDirection& answer) const;
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void ComputeAudioCodecsIntersectionAndUnion();
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void ComputeVideoCodecsIntersectionAndUnion();
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CodecList audio_send_codecs_;
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CodecList audio_recv_codecs_;
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// Intersection of send and recv.
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CodecList audio_sendrecv_codecs_;
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// Union of send and recv.
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CodecList all_audio_codecs_;
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CodecList video_send_codecs_;
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CodecList video_recv_codecs_;
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// Intersection of send and recv.
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CodecList video_sendrecv_codecs_;
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// Union of send and recv.
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CodecList all_video_codecs_;
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};
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} // namespace cricket
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#endif // PC_CODEC_VENDOR_H_
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