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The GetImplementations function is similar to the GetSupportedFormats function, but instead of providing one SdpVideoFormat per codec it provides one per codec implementation. These SdpVideoFormats can then be tagged so that a certain implementation can be instantiated when CreateVideoEncoder is called. Bug: webrtc:10795 Change-Id: I79f2380aa03d75d5f9f36138625abf3543c2339d Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/145215 Reviewed-by: Sami Kalliomäki <sakal@webrtc.org> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Commit-Queue: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28553}
66 lines
2.4 KiB
C++
66 lines
2.4 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_ENCODER_FACTORY_H_
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#define API_VIDEO_CODECS_VIDEO_ENCODER_FACTORY_H_
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#include <memory>
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#include <vector>
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#include "api/video_codecs/sdp_video_format.h"
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namespace webrtc {
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class VideoEncoder;
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// A factory that creates VideoEncoders.
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// NOTE: This class is still under development and may change without notice.
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class VideoEncoderFactory {
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public:
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// TODO(magjed): Try to get rid of this struct.
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struct CodecInfo {
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// |is_hardware_accelerated| is true if the encoders created by this factory
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// of the given codec will use hardware support.
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bool is_hardware_accelerated;
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// |has_internal_source| is true if encoders created by this factory of the
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// given codec will use internal camera sources, meaning that they don't
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// require/expect frames to be delivered via webrtc::VideoEncoder::Encode.
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// This flag is used as the internal_source parameter to
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// webrtc::ViEExternalCodec::RegisterExternalSendCodec.
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bool has_internal_source;
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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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// Returns a list of supported video formats in order of preference, that can
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// also be tagged with additional information to allow the VideoEncoderFactory
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// to separate between different implementations when CreateVideoEncoder is
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// called.
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virtual std::vector<SdpVideoFormat> GetImplementations() const {
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return GetSupportedFormats();
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}
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// Returns information about how this format will be encoded. The specified
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// format must be one of the supported formats by this factory.
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// TODO(magjed): Try to get rid of this method.
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virtual CodecInfo QueryVideoEncoder(const SdpVideoFormat& format) const = 0;
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// Creates a VideoEncoder for the specified format.
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virtual std::unique_ptr<VideoEncoder> CreateVideoEncoder(
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const SdpVideoFormat& format) = 0;
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virtual ~VideoEncoderFactory() {}
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};
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} // namespace webrtc
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#endif // API_VIDEO_CODECS_VIDEO_ENCODER_FACTORY_H_
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