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// Copyright (c) 2020, The rav1e contributors. All rights reserved // // This source code is subject to the terms of the BSD 2 Clause License and // the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License // was not distributed with this source code in the LICENSE file, you can // obtain it at www.aomedia.org/license/software. If the Alliance for Open // Media Patent License 1.0 was not distributed with this source code in the // PATENTS file, you can obtain it at www.aomedia.org/license/patent. use itertools::*; use crate::api::color::*; use crate::api::{Rational, SpeedSettings}; use crate::encoder::Tune; use crate::serialize::{Deserialize, Serialize}; use std::fmt; // We add 1 to rdo_lookahead_frames in a bunch of places. pub(crate) const MAX_RDO_LOOKAHEAD_FRAMES: usize = usize::max_value() - 1; // Due to the math in RCState::new() regarding the reservoir frame delay. pub(crate) const MAX_MAX_KEY_FRAME_INTERVAL: u64 = i32::max_value() as u64 / 3; /// Encoder settings which impact the produced bitstream. #[derive(Clone, Copy, Debug, Serialize, Deserialize)] pub struct EncoderConfig { // output size /// Width of the frames in pixels. pub width: usize, /// Height of the frames in pixels. pub height: usize, /// Sample aspect ratio (for anamorphic video). pub sample_aspect_ratio: Rational, /// Video time base. pub time_base: Rational, // data format and ancillary color information /// Bit depth. pub bit_depth: usize, /// Chroma subsampling. pub chroma_sampling: ChromaSampling, /// Chroma sample position. pub chroma_sample_position: ChromaSamplePosition, /// Pixel value range. pub pixel_range: PixelRange, /// Content color description (primaries, transfer characteristics, matrix). pub color_description: Option<ColorDescription>, /// HDR mastering display parameters. pub mastering_display: Option<MasteringDisplay>, /// HDR content light parameters. pub content_light: Option<ContentLight>, /// Enable signaling timing info in the bitstream. pub enable_timing_info: bool, /// Still picture mode flag. pub still_picture: bool, /// Flag to force all frames to be error resilient. pub error_resilient: bool, /// Interval between switch frames (0 to disable) pub switch_frame_interval: u64, // encoder configuration /// The *minimum* interval between two keyframes pub min_key_frame_interval: u64, /// The *maximum* interval between two keyframes pub max_key_frame_interval: u64, /// The number of temporal units over which to distribute the reservoir /// usage. pub reservoir_frame_delay: Option<i32>, /// Flag to enable low latency mode. /// /// In this mode the frame reordering is disabled. pub low_latency: bool, /// The base quantizer to use. pub quantizer: usize, /// The minimum allowed base quantizer to use in bitrate mode. pub min_quantizer: u8, /// The target bitrate for the bitrate mode. pub bitrate: i32, /// Metric to tune the quality for. pub tune: Tune, /// Number of tiles horizontally. Must be a power of two. /// /// Overridden by [`tiles`], if present. /// /// [`tiles`]: #structfield.tiles pub tile_cols: usize, /// Number of tiles vertically. Must be a power of two. /// /// Overridden by [`tiles`], if present. /// /// [`tiles`]: #structfield.tiles pub tile_rows: usize, /// Total number of tiles desired. /// /// Encoder will try to optimally split to reach this number of tiles, /// rounded up. Overrides [`tile_cols`] and [`tile_rows`]. /// /// [`tile_cols`]: #structfield.tile_cols /// [`tile_rows`]: #structfield.tile_rows pub tiles: usize, /// Number of frames to read ahead for the RDO lookahead computation. pub rdo_lookahead_frames: usize, /// Settings which affect the enconding speed vs. quality trade-off. pub speed_settings: SpeedSettings, } /// Default preset for EncoderConfig: it is a balance between quality and /// speed. See [`with_speed_preset()`]. /// /// [`with_speed_preset()`]: struct.EncoderConfig.html#method.with_speed_preset impl Default for EncoderConfig { fn default() -> Self { const DEFAULT_SPEED: usize = 6; Self::with_speed_preset(DEFAULT_SPEED) } } impl EncoderConfig { /// This is a preset which provides default settings according to a speed /// value in the specific range 0–10. Each speed value corresponds to a /// different preset. See [`from_preset()`]. If the input value is greater /// than 10, it will result in the same settings as 10. /// /// [`from_preset()`]: struct.SpeedSettings.html#method.from_preset pub fn with_speed_preset(speed: usize) -> Self { EncoderConfig { width: 640, height: 480, sample_aspect_ratio: Rational { num: 1, den: 1 }, time_base: Rational { num: 1, den: 30 }, bit_depth: 8, chroma_sampling: ChromaSampling::Cs420, chroma_sample_position: ChromaSamplePosition::Unknown, pixel_range: Default::default(), color_description: None, mastering_display: None, content_light: None, enable_timing_info: false, still_picture: false, error_resilient: false, switch_frame_interval: 0, min_key_frame_interval: 12, max_key_frame_interval: 240, min_quantizer: 0, reservoir_frame_delay: None, low_latency: false, quantizer: 100, bitrate: 0, tune: Tune::default(), tile_cols: 0, tile_rows: 0, tiles: 0, rdo_lookahead_frames: 40, speed_settings: SpeedSettings::from_preset(speed), } } /// Sets the minimum and maximum keyframe interval, handling special cases as needed. pub fn set_key_frame_interval( &mut self, min_interval: u64, max_interval: u64, ) { self.min_key_frame_interval = min_interval; // Map an input value of 0 to an infinite interval self.max_key_frame_interval = if max_interval == 0 { MAX_MAX_KEY_FRAME_INTERVAL } else { max_interval }; } /// Returns the video frame rate computed from [`time_base`]. /// /// [`time_base`]: #structfield.time_base pub fn frame_rate(&self) -> f64 { Rational::from_reciprocal(self.time_base).as_f64() } /// Computes the render width and height of the stream based /// on [`width`], [`height`], and [`sample_aspect_ratio`]. /// /// [`width`]: #structfield.width /// [`height`]: #structfield.height /// [`sample_aspect_ratio`]: #structfield.sample_aspect_ratio pub fn render_size(&self) -> (usize, usize) { let sar = self.sample_aspect_ratio.as_f64(); if sar > 1.0 { ((self.width as f64 * sar).round() as usize, self.height) } else { (self.width, (self.height as f64 / sar).round() as usize) } } /// Is temporal RDO enabled ? #[inline] pub const fn temporal_rdo(&self) -> bool { // Note: This function is called frequently, unlike most other functions here. // `compute_distortion_scale` computes a scaling factor for the distortion // of an 8x8 block (4x4 blocks simply use the scaling of the enclosing 8x8 // block). As long as distortion is always computed on <= 8x8 blocks, this // has the property that the scaled distortion of a 2Nx2N block is always // equal to the sum of the scaled distortions of the NxN sub-blocks it's // made of, this is a necessary property to be able to do RDO between // multiple partition sizes properly. Unfortunately, when tx domain // distortion is used, distortion is only known at the tx block level which // might be bigger than 8x8. So temporal RDO is always disabled in that case. !self.speed_settings.tx_domain_distortion } } impl fmt::Display for EncoderConfig { fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { let pairs = [ ("keyint_min", self.min_key_frame_interval.to_string()), ("keyint_max", self.max_key_frame_interval.to_string()), ("quantizer", self.quantizer.to_string()), ("bitrate", self.bitrate.to_string()), ("min_quantizer", self.min_quantizer.to_string()), ("low_latency", self.low_latency.to_string()), ("tune", self.tune.to_string()), ("rdo_lookahead_frames", self.rdo_lookahead_frames.to_string()), ("min_block_size", self.speed_settings.partition_range.min.to_string()), ("max_block_size", self.speed_settings.partition_range.max.to_string()), ( "multiref", (!self.low_latency || self.speed_settings.multiref).to_string(), ), ("fast_deblock", self.speed_settings.fast_deblock.to_string()), ("reduced_tx_set", self.speed_settings.reduced_tx_set.to_string()), ( "tx_domain_distortion", self.speed_settings.tx_domain_distortion.to_string(), ), ("tx_domain_rate", self.speed_settings.tx_domain_rate.to_string()), ("encode_bottomup", self.speed_settings.encode_bottomup.to_string()), ("rdo_tx_decision", self.speed_settings.rdo_tx_decision.to_string()), ("prediction_modes", self.speed_settings.prediction_modes.to_string()), ("include_near_mvs", self.speed_settings.include_near_mvs.to_string()), ( "no_scene_detection", self.speed_settings.no_scene_detection.to_string(), ), ("cdef", self.speed_settings.cdef.to_string()), ("use_satd_subpel", self.speed_settings.use_satd_subpel.to_string()), ( "non_square_partition", self.speed_settings.non_square_partition.to_string(), ), ("enable_timing_info", self.enable_timing_info.to_string()), ( "fine_directional_intra", self.speed_settings.fine_directional_intra.to_string(), ), ]; write!( f, "{}", pairs.iter().map(|pair| format!("{}={}", pair.0, pair.1)).join(" ") ) } }