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ce807810be
Bug: webrtc:356878416 Change-Id: Id910bef48138b1b659938b1c1a6d23b5634967f5 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/359540 Reviewed-by: Jakob Ivarsson <jakobi@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42781}
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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* Copyright (c) 2017 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 API_AUDIO_CODECS_AUDIO_ENCODER_FACTORY_H_
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#define API_AUDIO_CODECS_AUDIO_ENCODER_FACTORY_H_
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#include <memory>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/audio_codecs/audio_codec_pair_id.h"
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#include "api/audio_codecs/audio_encoder.h"
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#include "api/audio_codecs/audio_format.h"
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#include "api/environment/environment.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/ref_count.h"
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namespace webrtc {
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// A factory that creates AudioEncoders.
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class AudioEncoderFactory : public RefCountInterface {
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public:
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struct Options {
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// The encoder will tags its payloads with the specified payload type.
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// TODO(ossu): Try to avoid audio encoders having to know their payload
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// type.
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int payload_type = -1;
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// Links encoders and decoders that talk to the same remote entity: if
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// a AudioEncoderFactory::Create() and a AudioDecoderFactory::Create() call
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// receive non-null IDs that compare equal, the factory implementations may
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// assume that the encoder and decoder form a pair. (The intended use case
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// for this is to set up communication between the AudioEncoder and
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// AudioDecoder instances, which is needed for some codecs with built-in
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// bandwidth adaptation.)
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//
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// Note: Implementations need to be robust against combinations other than
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// one encoder, one decoder getting the same ID; such encoders must still
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// work.
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absl::optional<AudioCodecPairId> codec_pair_id;
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};
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// Returns a prioritized list of audio codecs, to use for signaling etc.
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virtual std::vector<AudioCodecSpec> GetSupportedEncoders() = 0;
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// Returns information about how this format would be encoded, provided it's
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// supported. More format and format variations may be supported than those
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// returned by GetSupportedEncoders().
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virtual absl::optional<AudioCodecInfo> QueryAudioEncoder(
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const SdpAudioFormat& format) = 0;
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// Creates an AudioEncoder for the specified format.
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// Returns null if the format isn't supported.
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virtual absl::Nullable<std::unique_ptr<AudioEncoder>> Create(
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const Environment& env,
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const SdpAudioFormat& format,
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Options options) = 0;
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};
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} // namespace webrtc
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#endif // API_AUDIO_CODECS_AUDIO_ENCODER_FACTORY_H_
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