1 /* 2 * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef VIDEO_ALIGNMENT_ADJUSTER_H_ 12 #define VIDEO_ALIGNMENT_ADJUSTER_H_ 13 14 #include "api/video_codecs/video_encoder.h" 15 #include "api/video_codecs/video_encoder_config.h" 16 17 namespace webrtc { 18 19 class AlignmentAdjuster { 20 public: 21 // Returns the resolution alignment requested by the encoder (i.e 22 // |EncoderInfo::requested_resolution_alignment| which ensures that delivered 23 // frames to the encoder are divisible by this alignment). 24 // 25 // If |EncoderInfo::apply_alignment_to_all_simulcast_layers| is enabled, the 26 // alignment will be adjusted to ensure that each simulcast layer also is 27 // divisible by |requested_resolution_alignment|. The configured scale factors 28 // |scale_resolution_down_by| may be adjusted to a common multiple to limit 29 // the alignment value to avoid largely cropped frames and possibly with an 30 // aspect ratio far from the original. 31 static int GetAlignmentAndMaybeAdjustScaleFactors( 32 const VideoEncoder::EncoderInfo& info, 33 VideoEncoderConfig* config); 34 }; 35 36 } // namespace webrtc 37 38 #endif // VIDEO_ALIGNMENT_ADJUSTER_H_ 39