c29e1f5415
QueryCodecSupport() is needed in the coming work with extending the MediaCapabilities API to WebRTC. In the API, a user can query whether a specified media configuration is supported, power efficient, and smooth. QueryCodecSupport() will be used to determine if the configuration is supported and power efficient. Bug: chromium:1187565 Change-Id: Ib1d93433a180b433f0bf60d6e871d03cebc4c0a6 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215922 Commit-Queue: Johannes Kron <kron@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33843}
75 lines
2.6 KiB
C++
75 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_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 <string>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/video_codecs/sdp_video_format.h"
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#include "rtc_base/system/rtc_export.h"
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namespace webrtc {
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class VideoDecoder;
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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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// 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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// See https://w3c.github.io/webrtc-svc/#scalabilitymodes* for a specification
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// of valid values for |scalability_mode|.
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// NOTE: QueryCodecSupport is currently an experimental feature that is
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// subject to change without notice.
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virtual CodecSupport QueryCodecSupport(
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const SdpVideoFormat& format,
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absl::optional<std::string> scalability_mode) const {
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// Default implementation, query for supported formats and check if the
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// specified format is supported. Returns false if scalability_mode is
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// specified.
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CodecSupport codec_support;
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if (!scalability_mode) {
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codec_support.is_supported = format.IsCodecInList(GetSupportedFormats());
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}
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return codec_support;
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}
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// Creates a VideoDecoder for the specified format.
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virtual std::unique_ptr<VideoDecoder> CreateVideoDecoder(
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const SdpVideoFormat& format) = 0;
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// Note: Do not call or override this method! This method is a legacy
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// workaround and is scheduled for removal without notice.
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virtual std::unique_ptr<VideoDecoder> LegacyCreateVideoDecoder(
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const SdpVideoFormat& format,
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const std::string& receive_stream_id);
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virtual ~VideoDecoderFactory() {}
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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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