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38c1ab1e6c
Instead require Create to be implemented Bug: webrtc:15791 Change-Id: I17477b5f047d86b6a05bda594c66d20f8f43a2c6 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/340480 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41857}
60 lines
2.3 KiB
C++
60 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_VIDEO_CODECS_VIDEO_DECODER_FACTORY_H_
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#define API_VIDEO_CODECS_VIDEO_DECODER_FACTORY_H_
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#include <memory>
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#include <vector>
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#include "api/environment/environment.h"
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#include "api/video_codecs/sdp_video_format.h"
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#include "api/video_codecs/video_decoder.h"
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#include "rtc_base/system/rtc_export.h"
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namespace webrtc {
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// A factory that creates VideoDecoders.
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// NOTE: This class is still under development and may change without notice.
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class RTC_EXPORT VideoDecoderFactory {
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public:
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struct CodecSupport {
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bool is_supported = false;
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bool is_power_efficient = false;
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};
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virtual ~VideoDecoderFactory() = default;
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// Returns a list of supported video formats in order of preference, to use
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// for signaling etc.
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virtual std::vector<SdpVideoFormat> GetSupportedFormats() const = 0;
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// Query whether the specifed format is supported or not and if it will be
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// power efficient, which is currently interpreted as if there is support for
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// hardware acceleration.
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// The parameter `reference_scaling` is used to query support for prediction
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// across spatial layers. An example where support for reference scaling is
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// needed is if the video stream is produced with a scalability mode that has
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// a dependency between the spatial layers. See
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// https://w3c.github.io/webrtc-svc/#scalabilitymodes* for a specification of
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// different scalabilty modes. NOTE: QueryCodecSupport is currently an
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// experimental feature that is subject to change without notice.
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virtual CodecSupport QueryCodecSupport(const SdpVideoFormat& format,
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bool reference_scaling) const;
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// Creates a VideoDecoder for the specified `format`.
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virtual std::unique_ptr<VideoDecoder> Create(
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const Environment& env,
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const SdpVideoFormat& format) = 0;
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};
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} // namespace webrtc
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#endif // API_VIDEO_CODECS_VIDEO_DECODER_FACTORY_H_
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