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78f905e5cc
Bug: webrtc:15622 Change-Id: I2d4c20c726af1a052e161b7689a73d1e5e3eb191 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/325526 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41067}
53 lines
2 KiB
C++
53 lines
2 KiB
C++
/*
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* Copyright (c) 2016 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_DECODER_FACTORY_H_
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#define API_AUDIO_CODECS_AUDIO_DECODER_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_decoder.h"
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#include "api/audio_codecs/audio_format.h"
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#include "api/ref_count.h"
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namespace webrtc {
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// A factory that creates AudioDecoders.
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class AudioDecoderFactory : public RefCountInterface {
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public:
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virtual std::vector<AudioCodecSpec> GetSupportedDecoders() = 0;
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virtual bool IsSupportedDecoder(const SdpAudioFormat& format) = 0;
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// Create a new decoder instance. The `codec_pair_id` argument is used to link
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// encoders and decoders that talk to the same remote entity: if a
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// AudioEncoderFactory::MakeAudioEncoder() and a
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// AudioDecoderFactory::MakeAudioDecoder() call receive non-null IDs that
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// compare equal, the factory implementations may assume that the encoder and
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// decoder form a pair. (The intended use case for this is to set up
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// communication between the AudioEncoder and AudioDecoder instances, which is
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// needed for some codecs with built-in bandwidth adaptation.)
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//
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// Returns null if the format isn't supported.
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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 decoders must still
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// work.
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virtual std::unique_ptr<AudioDecoder> MakeAudioDecoder(
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const SdpAudioFormat& format,
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absl::optional<AudioCodecPairId> codec_pair_id) = 0;
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};
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} // namespace webrtc
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#endif // API_AUDIO_CODECS_AUDIO_DECODER_FACTORY_H_
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