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f1c470e9fb
Bug: webrtc:9062 Change-Id: I929097f45986335633ccf01462348c9d24202424 Reviewed-on: https://webrtc-review.googlesource.com/74441 Commit-Queue: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23487}
58 lines
2.3 KiB
C++
58 lines
2.3 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 "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/optional.h"
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#include "rtc_base/refcount.h"
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namespace webrtc {
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// A factory that creates AudioEncoders.
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// NOTE: This class is still under development and may change without notice.
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class AudioEncoderFactory : public rtc::RefCountInterface {
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public:
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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 rtc::Optional<AudioCodecInfo> QueryAudioEncoder(
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const SdpAudioFormat& format) = 0;
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// Creates an AudioEncoder for the specified format. The encoder will tags
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// its payloads with the specified payload type. The `codec_pair_id` argument
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// is used to link encoders and decoders that talk to the same remote entity;
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// if a MakeAudioEncoder() and a MakeAudioDecoder() call receive non-null IDs
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// that compare equal, the factory implementations may assume that the
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// encoder and decoder form a pair.
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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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//
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// TODO(ossu): Try to avoid audio encoders having to know their payload type.
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virtual std::unique_ptr<AudioEncoder> MakeAudioEncoder(
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int payload_type,
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const SdpAudioFormat& format,
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rtc::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_ENCODER_FACTORY_H_
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