43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020 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 VIDEO_ALIGNMENT_ADJUSTER_H_
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#define VIDEO_ALIGNMENT_ADJUSTER_H_
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#include "api/video_codecs/video_encoder.h"
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#include "api/video_codecs/video_encoder_config.h"
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namespace webrtc {
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class AlignmentAdjuster {
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public:
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// Returns the resolution alignment requested by the encoder (i.e
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// |EncoderInfo::requested_resolution_alignment| which ensures that delivered
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// frames to the encoder are divisible by this alignment).
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//
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// If |EncoderInfo::apply_alignment_to_all_simulcast_layers| is enabled, the
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// alignment will be adjusted to ensure that each simulcast layer also is
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// divisible by |requested_resolution_alignment|. The configured scale factors
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// |scale_resolution_down_by| may be adjusted to a common multiple to limit
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// the alignment value to avoid largely cropped frames and possibly with an
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// aspect ratio far from the original.
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// Note: |max_layers| currently only taken into account when using default
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// scale factors.
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static int GetAlignmentAndMaybeAdjustScaleFactors(
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const VideoEncoder::EncoderInfo& info,
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VideoEncoderConfig* config,
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absl::optional<size_t> max_layers);
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};
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} // namespace webrtc
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#endif // VIDEO_ALIGNMENT_ADJUSTER_H_
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