api.rs 18.6 KB
Newer Older
rzumer's avatar
rzumer committed
1 2 3 4 5 6 7 8 9
// Copyright (c) 2018, 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.

Raphaël Zumer's avatar
Raphaël Zumer committed
10
use bitstream_io::*;
Luca Barbato's avatar
Luca Barbato committed
11
use encoder::*;
Raphaël Zumer's avatar
Raphaël Zumer committed
12
use metrics::calculate_frame_psnr;
13
use partition::*;
Raphaël Zumer's avatar
Raphaël Zumer committed
14 15
use scenechange::SceneChangeDetector;
use self::EncoderStatus::*;
Luca Barbato's avatar
Luca Barbato committed
16

Raphaël Zumer's avatar
Raphaël Zumer committed
17
use std::{cmp, fmt, io};
fbossen's avatar
fbossen committed
18
use std::collections::BTreeMap;
Luca Barbato's avatar
Luca Barbato committed
19
use std::sync::Arc;
Josh Holmer's avatar
Josh Holmer committed
20 21 22 23
use util::Fixed;
use std::collections::BTreeSet;

const LOOKAHEAD_FRAMES: u64 = 10;
Luca Barbato's avatar
Luca Barbato committed
24

25 26 27 28 29 30 31 32
#[derive(Debug, Clone, Copy)]
pub struct VideoDetails {
  pub width: usize,
  pub height: usize,
  pub mono: bool,
  pub bit_depth: usize,
  pub chroma_sampling: ChromaSampling,
  pub chroma_sample_position: ChromaSamplePosition,
Luca Barbato's avatar
Luca Barbato committed
33
  pub time_base: Rational,
34 35 36 37 38 39 40 41 42 43 44
}

impl Default for VideoDetails {
  fn default() -> Self {
    VideoDetails {
      width: 640,
      height: 480,
      mono: false,
      bit_depth: 8,
      chroma_sampling: ChromaSampling::Cs420,
      chroma_sample_position: ChromaSamplePosition::Unknown,
Luca Barbato's avatar
Luca Barbato committed
45
      time_base: Rational { num: 30, den: 1 }
46 47 48 49
    }
  }
}

Luca Barbato's avatar
Luca Barbato committed
50 51
// TODO: use the num crate?
#[derive(Clone, Copy, Debug)]
52
#[repr(C)]
Luca Barbato's avatar
Luca Barbato committed
53 54 55
pub struct Rational {
  pub num: u64,
  pub den: u64
Luca Barbato's avatar
Luca Barbato committed
56 57
}

Luca Barbato's avatar
Luca Barbato committed
58 59 60
impl Rational {
  pub fn new(num: u64, den: u64) -> Self {
    Rational { num, den }
Luca Barbato's avatar
Luca Barbato committed
61 62 63
  }
}

64 65 66 67 68 69 70
#[derive(Clone, Copy, Debug)]
#[repr(C)]
pub struct Point {
  pub x: u16,
  pub y: u16
}

71 72
#[derive(Copy, Clone, Debug)]
pub struct EncoderConfig {
Josh Holmer's avatar
Josh Holmer committed
73 74 75 76
  /// The *minimum* interval between two keyframes
  pub min_key_frame_interval: u64,
  /// The *maximum* interval between two keyframes
  pub max_key_frame_interval: u64,
77
  pub low_latency: bool,
78
  pub quantizer: usize,
79
  pub tune: Tune,
80
  pub pixel_range: PixelRange,
81
  pub color_description: Option<ColorDescription>,
82 83
  pub mastering_display: Option<MasteringDisplay>,
  pub content_light: Option<ContentLight>,
84
  pub speed_settings: SpeedSettings,
85
  pub show_psnr: bool,
86 87 88 89
}

impl Default for EncoderConfig {
  fn default() -> Self {
90 91
    const DEFAULT_SPEED: usize = 3;
    Self::with_speed_preset(DEFAULT_SPEED)
92 93 94
  }
}

95 96 97
impl EncoderConfig {
  pub fn with_speed_preset(speed: usize) -> Self {
    EncoderConfig {
Josh Holmer's avatar
Josh Holmer committed
98 99
      min_key_frame_interval: 12,
      max_key_frame_interval: 240,
100 101 102
      low_latency: true,
      quantizer: 100,
      tune: Tune::Psnr,
103
      pixel_range: PixelRange::Unspecified,
104
      color_description: None,
105 106
      mastering_display: None,
      content_light: None,
107 108
      speed_settings: SpeedSettings::from_preset(speed),
      show_psnr: false,
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
    }
  }
}

#[derive(Clone, Copy, Debug)]
pub struct SpeedSettings {
  pub min_block_size: BlockSize,
  pub multiref: bool,
  pub fast_deblock: bool,
  pub reduced_tx_set: bool,
  pub tx_domain_distortion: bool,
  pub encode_bottomup: bool,
  pub rdo_tx_decision: bool,
  pub prediction_modes: PredictionModesSetting,
  pub include_near_mvs: bool,
}

impl SpeedSettings {
  pub fn from_preset(speed: usize) -> Self {
    SpeedSettings {
      min_block_size: Self::min_block_size_preset(speed),
      multiref: Self::multiref_preset(speed),
      fast_deblock: Self::fast_deblock_preset(speed),
      reduced_tx_set: Self::reduced_tx_set_preset(speed),
      tx_domain_distortion: Self::tx_domain_distortion_preset(speed),
      encode_bottomup: Self::encode_bottomup_preset(speed),
      rdo_tx_decision: Self::rdo_tx_decision_preset(speed),
      prediction_modes: Self::prediction_modes_preset(speed),
      include_near_mvs: Self::include_near_mvs_preset(speed),
    }
  }

  fn min_block_size_preset(speed: usize) -> BlockSize {
    if speed <= 1 {
      BlockSize::BLOCK_4X4
    } else if speed <= 2 {
      BlockSize::BLOCK_8X8
    } else if speed <= 3 {
      BlockSize::BLOCK_16X16
    } else if speed <= 4 {
      BlockSize::BLOCK_32X32
    } else {
      BlockSize::BLOCK_64X64
    }
  }

  fn multiref_preset(speed: usize) -> bool {
    speed <= 2
  }

  fn fast_deblock_preset(speed: usize) -> bool {
    speed >= 4
  }

  fn reduced_tx_set_preset(speed: usize) -> bool {
    speed >= 2
  }

  fn tx_domain_distortion_preset(speed: usize) -> bool {
    speed >= 1
  }

  fn encode_bottomup_preset(speed: usize) -> bool {
    speed == 0
  }

  fn rdo_tx_decision_preset(speed: usize) -> bool {
    speed <= 3
  }

  fn prediction_modes_preset(speed: usize) -> PredictionModesSetting {
180
    if speed <= 1 {
181
      PredictionModesSetting::ComplexAll
182
    } else if speed <= 3 {
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200
      PredictionModesSetting::ComplexKeyframes
    } else {
      PredictionModesSetting::Simple
    }
  }

  fn include_near_mvs_preset(speed: usize) -> bool {
    speed <= 2
  }
}

#[derive(Clone, Copy, Debug, PartialOrd, PartialEq)]
pub enum PredictionModesSetting {
  Simple,
  ComplexKeyframes,
  ComplexAll,
}

201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
arg_enum!{
  #[derive(Debug, Clone, Copy, PartialEq)]
  #[repr(C)]
  pub enum PixelRange {
      Unspecified = 0,
      Limited,
      Full,
  }
}

impl Default for PixelRange {
    fn default() -> Self {
        PixelRange::Unspecified
    }
}

217 218
arg_enum!{
  #[derive(Debug, Clone, Copy, PartialEq)]
219
  #[repr(C)]
220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235
  pub enum MatrixCoefficients {
      Identity = 0,
      BT709,
      Unspecified,
      BT470M = 4,
      BT470BG,
      ST170M,
      ST240M,
      YCgCo,
      BT2020NonConstantLuminance,
      BT2020ConstantLuminance,
      ST2085,
      ChromaticityDerivedNonConstantLuminance,
      ChromaticityDerivedConstantLuminance,
      ICtCp,
  }
236 237 238 239 240 241 242 243
}

impl Default for MatrixCoefficients {
    fn default() -> Self {
        MatrixCoefficients::Unspecified
    }
}

244 245
arg_enum!{
  #[derive(Debug,Clone,Copy,PartialEq)]
246
  #[repr(C)]
247 248 249 250 251 252 253 254 255 256 257 258 259 260
  pub enum ColorPrimaries {
      BT709 = 1,
      Unspecified,
      BT470M = 4,
      BT470BG,
      ST170M,
      ST240M,
      Film,
      BT2020,
      ST428,
      P3DCI,
      P3Display,
      Tech3213 = 22,
  }
261 262 263 264 265 266 267 268
}

impl Default for ColorPrimaries {
    fn default() -> Self {
        ColorPrimaries::Unspecified
    }
}

269 270
arg_enum!{
  #[derive(Debug,Clone,Copy,PartialEq)]
271
  #[repr(C)]
272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
  pub enum TransferCharacteristics {
      BT1886 = 1,
      Unspecified,
      BT470M = 4,
      BT470BG,
      ST170M,
      ST240M,
      Linear,
      Logarithmic100,
      Logarithmic316,
      XVYCC,
      BT1361E,
      SRGB,
      BT2020Ten,
      BT2020Twelve,
      PerceptualQuantizer,
      ST428,
      HybridLogGamma,
  }
291 292 293 294 295 296 297 298
}

impl Default for TransferCharacteristics {
    fn default() -> Self {
        TransferCharacteristics::Unspecified
    }
}

299 300 301 302 303 304 305
#[derive(Copy, Clone, Debug)]
pub struct ColorDescription {
    pub color_primaries: ColorPrimaries,
    pub transfer_characteristics: TransferCharacteristics,
    pub matrix_coefficients: MatrixCoefficients
}

306 307 308 309 310 311 312 313 314 315 316 317 318 319
#[derive(Copy, Clone, Debug)]
pub struct MasteringDisplay {
    pub primaries: [Point; 3],
    pub white_point: Point,
    pub max_luminance: u32,
    pub min_luminance: u32,
}

#[derive(Copy, Clone, Debug)]
pub struct ContentLight {
    pub max_content_light_level: u16,
    pub max_frame_average_light_level: u16,
}

320 321 322
/// Contain all the encoder configuration
#[derive(Clone, Copy, Debug)]
pub struct Config {
323
  pub video_info: VideoDetails,
Luca Barbato's avatar
Luca Barbato committed
324 325 326 327
  pub enc: EncoderConfig
}

impl Config {
Luca Barbato's avatar
Luca Barbato committed
328 329
  pub fn parse(&mut self, key: &str, value: &str) -> Result<(), EncoderStatus> {
    match key {
330
      "low_latency" => self.enc.low_latency = value.parse().map_err(|_e| ParseError)?,
Josh Holmer's avatar
Josh Holmer committed
331 332
      "min_key_frame_interval" => self.enc.min_key_frame_interval = value.parse().map_err(|_e| ParseError)?,
      "key_frame_interval" => self.enc.max_key_frame_interval = value.parse().map_err(|_e| ParseError)?,
333
      "quantizer" => self.enc.quantizer = value.parse().map_err(|_e| ParseError)?,
334
      "speed" => self.enc.speed_settings = SpeedSettings::from_preset(value.parse().map_err(|_e| ParseError)?),
335 336
      "tune" => self.enc.tune = value.parse().map_err(|_e| ParseError)?,
      _ => return Err(InvalidKey)
Luca Barbato's avatar
Luca Barbato committed
337 338 339 340 341
    }

    Ok(())
  }

Luca Barbato's avatar
Luca Barbato committed
342
  pub fn new_context(&self) -> Context {
343
    #[cfg(feature = "aom")]
Luca Barbato's avatar
Luca Barbato committed
344
    unsafe {
Luca Barbato's avatar
Luca Barbato committed
345 346
      av1_rtcd();
      aom_dsp_rtcd();
Luca Barbato's avatar
Luca Barbato committed
347 348
    }

Josh Holmer's avatar
Josh Holmer committed
349 350
    Context {
      frame_count: 0,
351
      limit: 0,
Josh Holmer's avatar
Josh Holmer committed
352
      idx: 0,
Josh Holmer's avatar
Josh Holmer committed
353
      frames_processed: 0,
Josh Holmer's avatar
Josh Holmer committed
354
      frame_q: BTreeMap::new(),
Josh Holmer's avatar
Josh Holmer committed
355 356
      frame_data: BTreeMap::new(),
      keyframes: BTreeSet::new(),
Josh Holmer's avatar
Josh Holmer committed
357 358 359
      packet_data: Vec::new(),
      segment_start_idx: 0,
      segment_start_frame: 0,
360
      keyframe_detector: SceneChangeDetector::new(&self.video_info),
Josh Holmer's avatar
Josh Holmer committed
361
      config: *self,
Josh Holmer's avatar
Josh Holmer committed
362
    }
Luca Barbato's avatar
Luca Barbato committed
363 364 365 366
  }
}

pub struct Context {
Luca Barbato's avatar
Luca Barbato committed
367
  //    timebase: Rational,
fbossen's avatar
fbossen committed
368
  frame_count: u64,
369
  limit: u64,
fbossen's avatar
fbossen committed
370
  idx: u64,
Josh Holmer's avatar
Josh Holmer committed
371 372
  frames_processed: u64,
  /// Maps frame *number* to frames
373
  frame_q: BTreeMap<u64, Option<Arc<Frame>>>, //    packet_q: VecDeque<Packet>
Josh Holmer's avatar
Josh Holmer committed
374 375 376 377 378
  /// Maps frame *idx* to frame data
  frame_data: BTreeMap<u64, FrameInvariants>,
  /// A list of keyframe *numbers* in this encode. Needed so that we don't
  /// need to keep all of the frame_data in memory for the whole life of the encode.
  keyframes: BTreeSet<u64>,
379
  /// A storage space for reordered frames.
Josh Holmer's avatar
Josh Holmer committed
380 381 382 383
  packet_data: Vec<u8>,
  segment_start_idx: u64,
  segment_start_frame: u64,
  keyframe_detector: SceneChangeDetector,
384
  pub config: Config,
Luca Barbato's avatar
Luca Barbato committed
385 386 387 388 389 390 391 392 393
}

#[derive(Clone, Copy, Debug)]
pub enum EncoderStatus {
  /// The encoder needs more Frames to produce an output Packet
  NeedMoreData,
  /// There are enough Frames queue
  EnoughData,
  ///
Luca Barbato's avatar
Luca Barbato committed
394 395 396
  Failure,
  InvalidKey,
  ParseError
Luca Barbato's avatar
Luca Barbato committed
397 398 399 400
}

pub struct Packet {
  pub data: Vec<u8>,
fbossen's avatar
fbossen committed
401 402
  pub rec: Option<Frame>,
  pub number: u64,
403 404 405
  pub frame_type: FrameType,
  /// PSNR for Y, U, and V planes
  pub psnr: Option<(f64, f64, f64)>,
406 407 408 409
}

impl fmt::Display for Packet {
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
Luca Barbato's avatar
Luca Barbato committed
410 411 412 413 414 415 416
    write!(
      f,
      "Frame {} - {} - {} bytes",
      self.number,
      self.frame_type,
      self.data.len()
    )
417
  }
Luca Barbato's avatar
Luca Barbato committed
418 419 420 421
}

impl Context {
  pub fn new_frame(&self) -> Arc<Frame> {
Josh Holmer's avatar
Josh Holmer committed
422
    Arc::new(Frame::new(
423 424 425
      self.config.video_info.width.align_power_of_two(3),
      self.config.video_info.height.align_power_of_two(3),
      self.config.video_info.chroma_sampling
Josh Holmer's avatar
Josh Holmer committed
426
    ))
Luca Barbato's avatar
Luca Barbato committed
427 428 429 430 431 432
  }

  pub fn send_frame<F>(&mut self, frame: F) -> Result<(), EncoderStatus>
  where
    F: Into<Option<Arc<Frame>>>
  {
Josh Holmer's avatar
Josh Holmer committed
433 434
    let idx = self.frame_count;
    self.frame_q.insert(idx, frame.into());
435
    self.frame_count += 1;
Luca Barbato's avatar
Luca Barbato committed
436 437 438
    Ok(())
  }

439 440 441 442
  pub fn get_frame_count(&self) -> u64 {
    self.frame_count
  }

443 444
  pub fn set_limit(&mut self, limit: u64) {
    self.limit = limit;
445 446
  }

Josh Holmer's avatar
Josh Holmer committed
447 448 449 450
  pub fn needs_more_lookahead(&self) -> bool {
    self.needs_more_frames(self.frame_count) && self.frames_processed + LOOKAHEAD_FRAMES > self.frame_q.keys().last().cloned().unwrap_or(0)
  }

451
  pub fn needs_more_frames(&self, frame_count: u64) -> bool {
452
    self.limit == 0 || frame_count < self.limit
453 454
  }

455 456 457
  pub fn container_sequence_header(&mut self) -> Vec<u8> {
    fn sequence_header_inner(seq: &Sequence) -> io::Result<Vec<u8>> {
      let mut buf = Vec::new();
458

459
      {
460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476
        let mut bw = BitWriter::endian(&mut buf, BigEndian);
        bw.write_bit(true)?; // marker
        bw.write(7, 1)?; // version
        bw.write(3, seq.profile)?;
        bw.write(5, 32)?; // level
        bw.write_bit(false)?; // tier
        bw.write_bit(seq.bit_depth > 8)?; // high_bitdepth
        bw.write_bit(seq.bit_depth == 12)?; // twelve_bit
        bw.write_bit(seq.bit_depth == 1)?; // monochrome
        bw.write_bit(seq.bit_depth == 12)?; // twelve_bit
        bw.write_bit(seq.chroma_sampling != ChromaSampling::Cs444)?; // chroma_subsampling_x
        bw.write_bit(seq.chroma_sampling == ChromaSampling::Cs420)?; // chroma_subsampling_y
        bw.write(2, 0)?; // sample_position
        bw.write(3, 0)?; // reserved
        bw.write_bit(false)?; // initial_presentation_delay_present

        bw.write(4, 0)?; // reserved
477
      }
478

479 480 481
      Ok(buf)
    }

Josh Holmer's avatar
Josh Holmer committed
482
    sequence_header_inner(&self.frame_data[&0].sequence).unwrap()
483 484
  }

Josh Holmer's avatar
Josh Holmer committed
485
  fn next_keyframe(&self) -> u64 {
Josh Holmer's avatar
Josh Holmer committed
486 487 488 489
    let next_detected = self.frame_data.values()
      .find(|fi| fi.frame_type == FrameType::KEY && fi.number > self.segment_start_frame)
      .map(|fi| fi.number);
    let next_limit = self.segment_start_frame + self.config.enc.max_key_frame_interval;
Josh Holmer's avatar
Josh Holmer committed
490 491 492 493 494
    if next_detected.is_none() {
      return next_limit;
    }
    cmp::min(next_detected.unwrap(), next_limit)
  }
fbossen's avatar
fbossen committed
495

496 497 498 499 500
  fn set_frame_properties(&mut self, idx: u64) -> bool {
    let (fi, end_of_subgop) = self.get_frame_properties(idx);
    self.frame_data.insert(idx, fi);

    end_of_subgop
Josh Holmer's avatar
Josh Holmer committed
501 502
  }

503
  fn get_frame_properties(&mut self, idx: u64) -> (FrameInvariants, bool) {
Josh Holmer's avatar
Josh Holmer committed
504
    if idx == 0 {
505
      let mut seq = Sequence::new(&self.config.video_info);
506
      seq.pixel_range = self.config.enc.pixel_range;
507
      seq.color_description = self.config.enc.color_description;
508 509
      seq.mastering_display = self.config.enc.mastering_display;
      seq.content_light = self.config.enc.content_light;
510

Josh Holmer's avatar
Josh Holmer committed
511
      // The first frame will always be a key frame
Josh Holmer's avatar
Josh Holmer committed
512 513
      let fi = FrameInvariants::new_key_frame(
        &FrameInvariants::new(
514 515
          self.config.video_info.width,
          self.config.video_info.height,
Josh Holmer's avatar
Josh Holmer committed
516
          self.config.enc,
517
          seq
Josh Holmer's avatar
Josh Holmer committed
518 519 520
        ),
        0
      );
521
      return (fi, true);
Josh Holmer's avatar
Josh Holmer committed
522 523
    }

Josh Holmer's avatar
Josh Holmer committed
524 525
    let mut fi = self.frame_data[&(idx - 1)].clone();

Josh Holmer's avatar
Josh Holmer committed
526 527 528 529 530 531
    // Initially set up the frame as an inter frame.
    // We need to determine what the frame number is before we can
    // look up the frame type. If reordering is enabled, the idx
    // may not match the frame number.
    let idx_in_segment = idx - self.segment_start_idx;
    if idx_in_segment > 0 {
Josh Holmer's avatar
Josh Holmer committed
532
      let next_keyframe = self.next_keyframe();
533
      let (fi_temp, end_of_subgop) = FrameInvariants::new_inter_frame(
Josh Holmer's avatar
Josh Holmer committed
534
        &fi,
535 536 537 538
        self.segment_start_frame,
        idx_in_segment,
        next_keyframe
      );
Josh Holmer's avatar
Josh Holmer committed
539
      fi = fi_temp;
540
      if !end_of_subgop {
Josh Holmer's avatar
Josh Holmer committed
541 542 543
        if !fi.inter_cfg.unwrap().reorder
          || ((idx_in_segment - 1) % fi.inter_cfg.unwrap().group_len == 0
          && fi.number == (next_keyframe - 1))
544
        {
Josh Holmer's avatar
Josh Holmer committed
545
          self.segment_start_idx = idx;
Josh Holmer's avatar
Josh Holmer committed
546
          self.segment_start_frame = next_keyframe;
Josh Holmer's avatar
Josh Holmer committed
547
          fi.number = next_keyframe;
Josh Holmer's avatar
Josh Holmer committed
548
        } else {
549
          return (fi, false);
Josh Holmer's avatar
Josh Holmer committed
550 551
        }
      }
fbossen's avatar
fbossen committed
552
    }
Luca Barbato's avatar
Luca Barbato committed
553

554 555
    match self.frame_q.get(&fi.number) {
      Some(Some(_)) => {},
Josh Holmer's avatar
Josh Holmer committed
556
      _ => { return (fi, false); }
557 558
    }

Josh Holmer's avatar
Josh Holmer committed
559
    // Now that we know the frame number, look up the correct frame type
Josh Holmer's avatar
Josh Holmer committed
560 561 562 563 564 565 566
    let frame_type = self.determine_frame_type(fi.number);
    if frame_type == FrameType::KEY {
      self.segment_start_idx = idx;
      self.segment_start_frame = fi.number;
      self.keyframes.insert(fi.number);
    }
    fi.frame_type = frame_type;
Josh Holmer's avatar
Josh Holmer committed
567

Josh Holmer's avatar
Josh Holmer committed
568 569 570 571 572
    let idx_in_segment = idx - self.segment_start_idx;
    if idx_in_segment == 0 {
      fi = FrameInvariants::new_key_frame(&fi, self.segment_start_frame);
    } else {
      let next_keyframe = self.next_keyframe();
573
      let (fi_temp, end_of_subgop) = FrameInvariants::new_inter_frame(
Josh Holmer's avatar
Josh Holmer committed
574 575 576 577 578 579
        &fi,
        self.segment_start_frame,
        idx_in_segment,
        next_keyframe
      );
      fi = fi_temp;
580 581
      if !end_of_subgop {
        return (fi, false);
Josh Holmer's avatar
Josh Holmer committed
582 583
      }
    }
584
    (fi, true)
fbossen's avatar
fbossen committed
585
  }
Luca Barbato's avatar
Luca Barbato committed
586

fbossen's avatar
fbossen committed
587 588
  pub fn receive_packet(&mut self) -> Result<Packet, EncoderStatus> {
    let mut idx = self.idx;
589
    while !self.set_frame_properties(idx) {
Josh Holmer's avatar
Josh Holmer committed
590
      self.idx += 1;
fbossen's avatar
fbossen committed
591 592
      idx = self.idx;
    }
Luca Barbato's avatar
Luca Barbato committed
593

Josh Holmer's avatar
Josh Holmer committed
594
    if !self.needs_more_frames(self.frame_data.get(&idx).unwrap().number) {
Josh Holmer's avatar
Josh Holmer committed
595
      self.idx += 1;
596 597 598
      return Err(EncoderStatus::EnoughData)
    }

Josh Holmer's avatar
Josh Holmer committed
599 600
    let fi = self.frame_data.get_mut(&idx).unwrap();
    if fi.show_existing_frame {
Josh Holmer's avatar
Josh Holmer committed
601
      self.idx += 1;
Luca Barbato's avatar
Luca Barbato committed
602

Josh Holmer's avatar
Josh Holmer committed
603
      let mut fs = FrameState::new(fi);
fbossen's avatar
fbossen committed
604

Josh Holmer's avatar
Josh Holmer committed
605
      let data = encode_frame(fi, &mut fs);
Luca Barbato's avatar
Luca Barbato committed
606

Josh Holmer's avatar
Josh Holmer committed
607
      let rec = if fi.show_frame { Some(fs.rec) } else { None };
608
      let mut psnr = None;
Josh Holmer's avatar
Josh Holmer committed
609
      if self.config.enc.show_psnr {
610
        if let Some(ref rec) = rec {
Josh Holmer's avatar
Josh Holmer committed
611
          psnr = Some(calculate_frame_psnr(&*fs.input, rec, fi.sequence.bit_depth));
612 613
        }
      }
Luca Barbato's avatar
Luca Barbato committed
614

Josh Holmer's avatar
Josh Holmer committed
615 616
      self.frames_processed += 1;
      Ok(Packet { data, rec, number: fi.number, frame_type: fi.frame_type, psnr })
Luca Barbato's avatar
Luca Barbato committed
617
    } else {
Josh Holmer's avatar
Josh Holmer committed
618
      if let Some(f) = self.frame_q.get(&fi.number) {
Josh Holmer's avatar
Josh Holmer committed
619
        self.idx += 1;
fbossen's avatar
fbossen committed
620 621

        if let Some(frame) = f {
Josh Holmer's avatar
Josh Holmer committed
622
          let mut fs = FrameState::new_with_frame(fi, frame.clone());
fbossen's avatar
fbossen committed
623

Josh Holmer's avatar
Josh Holmer committed
624
          let data = encode_frame(fi, &mut fs);
625
          self.packet_data.extend(data);
fbossen's avatar
fbossen committed
626

Josh Holmer's avatar
Josh Holmer committed
627
          fs.rec.pad(fi.width, fi.height);
fbossen's avatar
fbossen committed
628 629

          // TODO avoid the clone by having rec Arc.
Josh Holmer's avatar
Josh Holmer committed
630
          let rec = if fi.show_frame { Some(fs.rec.clone()) } else { None };
fbossen's avatar
fbossen committed
631

Josh Holmer's avatar
Josh Holmer committed
632
          update_rec_buffer(fi, fs);
fbossen's avatar
fbossen committed
633

Josh Holmer's avatar
Josh Holmer committed
634
          if fi.show_frame {
635
            let data = self.packet_data.clone();
636
            self.packet_data.clear();
637 638

            let mut psnr = None;
Josh Holmer's avatar
Josh Holmer committed
639
            if self.config.enc.show_psnr {
640
              if let Some(ref rec) = rec {
Josh Holmer's avatar
Josh Holmer committed
641
                psnr = Some(calculate_frame_psnr(&*frame, rec, fi.sequence.bit_depth));
642 643 644
              }
            }

Josh Holmer's avatar
Josh Holmer committed
645 646
            self.frames_processed += 1;
            Ok(Packet { data, rec, number: fi.number, frame_type: fi.frame_type, psnr })
647 648 649
          } else {
            Err(EncoderStatus::NeedMoreData)
          }
fbossen's avatar
fbossen committed
650 651 652 653 654 655
        } else {
          Err(EncoderStatus::NeedMoreData)
        }
      } else {
        Err(EncoderStatus::NeedMoreData)
      }
Luca Barbato's avatar
Luca Barbato committed
656 657 658
    }
  }

Josh Holmer's avatar
Josh Holmer committed
659 660 661 662 663 664 665 666 667 668 669 670 671 672 673
  pub fn garbage_collect(&mut self, cur_frame: u64) {
    if cur_frame == 0 {
      return;
    }
    for i in 0..cur_frame {
      self.frame_q.remove(&i);
    }
    if self.idx < 2 {
      return;
    }
    for i in 0..(self.idx - 1) {
      self.frame_data.remove(&i);
    }
  }

Luca Barbato's avatar
Luca Barbato committed
674
  pub fn flush(&mut self) {
fbossen's avatar
fbossen committed
675
    self.frame_q.insert(self.frame_count, None);
676
    self.frame_count += 1;
Luca Barbato's avatar
Luca Barbato committed
677
  }
Josh Holmer's avatar
Josh Holmer committed
678

Josh Holmer's avatar
Josh Holmer committed
679 680
  fn determine_frame_type(&mut self, frame_number: u64) -> FrameType {
    if frame_number == 0 {
Josh Holmer's avatar
Josh Holmer committed
681 682 683
      return FrameType::KEY;
    }

Josh Holmer's avatar
Josh Holmer committed
684 685 686 687 688 689 690 691
    let prev_keyframe = self.keyframes.iter()
      .rfind(|&&keyframe| keyframe < frame_number)
      .cloned()
      .unwrap_or(0);
    let frame = match self.frame_q.get(&frame_number).cloned() {
      Some(frame) => frame,
      None => { return FrameType::KEY; }
    };
Josh Holmer's avatar
Josh Holmer committed
692
    if let Some(frame) = frame {
Josh Holmer's avatar
Josh Holmer committed
693 694 695
      let distance = frame_number - prev_keyframe;
      if distance < self.config.enc.min_key_frame_interval {
        if distance + 1 == self.config.enc.min_key_frame_interval {
Josh Holmer's avatar
Josh Holmer committed
696 697
          // Run the detector for the current frame, so that it will contain this frame's information
          // to compare against the next frame. We can ignore the results for this frame.
Josh Holmer's avatar
Josh Holmer committed
698
          self.keyframe_detector.detect_scene_change(frame, frame_number as usize);
Josh Holmer's avatar
Josh Holmer committed
699 700 701
        }
        return FrameType::INTER;
      }
Josh Holmer's avatar
Josh Holmer committed
702
      if distance >= self.config.enc.max_key_frame_interval {
Josh Holmer's avatar
Josh Holmer committed
703 704
        return FrameType::KEY;
      }
Josh Holmer's avatar
Josh Holmer committed
705
      if self.keyframe_detector.detect_scene_change(frame, frame_number as usize) {
Josh Holmer's avatar
Josh Holmer committed
706 707 708 709 710
        return FrameType::KEY;
      }
    }
    FrameType::INTER
  }
Luca Barbato's avatar
Luca Barbato committed
711
}