api.rs 18.7 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

// TODO: use the num crate?
#[derive(Clone, Copy, Debug)]
27
#[repr(C)]
Luca Barbato's avatar
Luca Barbato committed
28 29 30
pub struct Rational {
  pub num: u64,
  pub den: u64
Luca Barbato's avatar
Luca Barbato committed
31 32
}

Luca Barbato's avatar
Luca Barbato committed
33 34 35
impl Rational {
  pub fn new(num: u64, den: u64) -> Self {
    Rational { num, den }
Luca Barbato's avatar
Luca Barbato committed
36 37 38
  }
}

39 40 41 42 43 44 45
#[derive(Clone, Copy, Debug)]
#[repr(C)]
pub struct Point {
  pub x: u16,
  pub y: u16
}

46 47
#[derive(Copy, Clone, Debug)]
pub struct EncoderConfig {
48
  // output size
49 50
  pub width: usize,
  pub height: usize,
51 52

  // data format and ancillary color information
53 54 55
  pub bit_depth: usize,
  pub chroma_sampling: ChromaSampling,
  pub chroma_sample_position: ChromaSamplePosition,
56 57 58 59 60 61
  pub pixel_range: PixelRange,
  pub color_description: Option<ColorDescription>,
  pub mastering_display: Option<MasteringDisplay>,
  pub content_light: Option<ContentLight>,

  // encoder configuration
62
  pub time_base: Rational,
Josh Holmer's avatar
Josh Holmer committed
63 64 65 66
  /// The *minimum* interval between two keyframes
  pub min_key_frame_interval: u64,
  /// The *maximum* interval between two keyframes
  pub max_key_frame_interval: u64,
67
  pub low_latency: bool,
68
  pub quantizer: usize,
69 70
  pub tune: Tune,
  pub speed_settings: SpeedSettings,
71
  pub show_psnr: bool,
72 73 74 75
}

impl Default for EncoderConfig {
  fn default() -> Self {
76 77
    const DEFAULT_SPEED: usize = 3;
    Self::with_speed_preset(DEFAULT_SPEED)
78 79 80
  }
}

81 82 83
impl EncoderConfig {
  pub fn with_speed_preset(speed: usize) -> Self {
    EncoderConfig {
84 85
      width: 640,
      height: 480,
86

87 88 89
      bit_depth: 8,
      chroma_sampling: ChromaSampling::Cs420,
      chroma_sample_position: ChromaSamplePosition::Unknown,
90 91 92 93 94
      pixel_range: PixelRange::Unspecified,
      color_description: None,
      mastering_display: None,
      content_light: None,

95
      time_base: Rational { num: 30, den: 1 },
Josh Holmer's avatar
Josh Holmer committed
96 97
      min_key_frame_interval: 12,
      max_key_frame_interval: 240,
98
      low_latency: false,
99 100
      quantizer: 100,
      tune: Tune::Psnr,
101 102
      speed_settings: SpeedSettings::from_preset(speed),
      show_psnr: false,
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
    }
  }
}

#[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 {
174
    if speed <= 1 {
175
      PredictionModesSetting::ComplexAll
176
    } else if speed <= 3 {
177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194
      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,
}

195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210
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
    }
}

211 212
arg_enum!{
  #[derive(Debug, Clone, Copy, PartialEq)]
213
  #[repr(C)]
214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
  pub enum MatrixCoefficients {
      Identity = 0,
      BT709,
      Unspecified,
      BT470M = 4,
      BT470BG,
      ST170M,
      ST240M,
      YCgCo,
      BT2020NonConstantLuminance,
      BT2020ConstantLuminance,
      ST2085,
      ChromaticityDerivedNonConstantLuminance,
      ChromaticityDerivedConstantLuminance,
      ICtCp,
  }
230 231 232 233 234 235 236 237
}

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

238 239
arg_enum!{
  #[derive(Debug,Clone,Copy,PartialEq)]
240
  #[repr(C)]
241 242 243 244 245 246 247 248 249 250 251 252 253 254
  pub enum ColorPrimaries {
      BT709 = 1,
      Unspecified,
      BT470M = 4,
      BT470BG,
      ST170M,
      ST240M,
      Film,
      BT2020,
      ST428,
      P3DCI,
      P3Display,
      Tech3213 = 22,
  }
255 256 257 258 259 260 261 262
}

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

263 264
arg_enum!{
  #[derive(Debug,Clone,Copy,PartialEq)]
265
  #[repr(C)]
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
  pub enum TransferCharacteristics {
      BT1886 = 1,
      Unspecified,
      BT470M = 4,
      BT470BG,
      ST170M,
      ST240M,
      Linear,
      Logarithmic100,
      Logarithmic316,
      XVYCC,
      BT1361E,
      SRGB,
      BT2020Ten,
      BT2020Twelve,
      PerceptualQuantizer,
      ST428,
      HybridLogGamma,
  }
285 286 287 288 289 290 291 292
}

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

293 294 295 296 297 298 299
#[derive(Copy, Clone, Debug)]
pub struct ColorDescription {
    pub color_primaries: ColorPrimaries,
    pub transfer_characteristics: TransferCharacteristics,
    pub matrix_coefficients: MatrixCoefficients
}

300 301 302 303 304 305 306 307 308 309 310 311 312 313
#[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,
}

314 315 316
/// Contain all the encoder configuration
#[derive(Clone, Copy, Debug)]
pub struct Config {
Luca Barbato's avatar
Luca Barbato committed
317 318 319 320
  pub enc: EncoderConfig
}

impl Config {
Luca Barbato's avatar
Luca Barbato committed
321 322
  pub fn parse(&mut self, key: &str, value: &str) -> Result<(), EncoderStatus> {
    match key {
323
      "low_latency" => self.enc.low_latency = value.parse().map_err(|_e| ParseError)?,
Josh Holmer's avatar
Josh Holmer committed
324 325
      "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)?,
326
      "quantizer" => self.enc.quantizer = value.parse().map_err(|_e| ParseError)?,
327
      "speed" => self.enc.speed_settings = SpeedSettings::from_preset(value.parse().map_err(|_e| ParseError)?),
328 329
      "tune" => self.enc.tune = value.parse().map_err(|_e| ParseError)?,
      _ => return Err(InvalidKey)
Luca Barbato's avatar
Luca Barbato committed
330 331 332 333 334
    }

    Ok(())
  }

Luca Barbato's avatar
Luca Barbato committed
335
  pub fn new_context(&self) -> Context {
336
    #[cfg(feature = "aom")]
Luca Barbato's avatar
Luca Barbato committed
337
    unsafe {
Luca Barbato's avatar
Luca Barbato committed
338 339
      av1_rtcd();
      aom_dsp_rtcd();
Luca Barbato's avatar
Luca Barbato committed
340 341
    }

Josh Holmer's avatar
Josh Holmer committed
342 343
    Context {
      frame_count: 0,
344
      limit: 0,
Josh Holmer's avatar
Josh Holmer committed
345
      idx: 0,
Josh Holmer's avatar
Josh Holmer committed
346
      frames_processed: 0,
Josh Holmer's avatar
Josh Holmer committed
347
      frame_q: BTreeMap::new(),
Josh Holmer's avatar
Josh Holmer committed
348 349
      frame_data: BTreeMap::new(),
      keyframes: BTreeSet::new(),
Josh Holmer's avatar
Josh Holmer committed
350 351 352
      packet_data: Vec::new(),
      segment_start_idx: 0,
      segment_start_frame: 0,
353
      keyframe_detector: SceneChangeDetector::new(self.enc.bit_depth),
Josh Holmer's avatar
Josh Holmer committed
354
      config: *self,
Josh Holmer's avatar
Josh Holmer committed
355
    }
Luca Barbato's avatar
Luca Barbato committed
356 357 358 359
  }
}

pub struct Context {
Luca Barbato's avatar
Luca Barbato committed
360
  //    timebase: Rational,
fbossen's avatar
fbossen committed
361
  frame_count: u64,
362
  limit: u64,
fbossen's avatar
fbossen committed
363
  idx: u64,
Josh Holmer's avatar
Josh Holmer committed
364 365
  frames_processed: u64,
  /// Maps frame *number* to frames
366
  frame_q: BTreeMap<u64, Option<Arc<Frame>>>, //    packet_q: VecDeque<Packet>
Josh Holmer's avatar
Josh Holmer committed
367 368 369 370 371
  /// 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>,
372
  /// A storage space for reordered frames.
Josh Holmer's avatar
Josh Holmer committed
373 374 375 376
  packet_data: Vec<u8>,
  segment_start_idx: u64,
  segment_start_frame: u64,
  keyframe_detector: SceneChangeDetector,
377
  pub config: Config,
Luca Barbato's avatar
Luca Barbato committed
378 379 380 381 382 383 384 385 386
}

#[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
387 388 389
  Failure,
  InvalidKey,
  ParseError
Luca Barbato's avatar
Luca Barbato committed
390 391 392 393
}

pub struct Packet {
  pub data: Vec<u8>,
fbossen's avatar
fbossen committed
394 395
  pub rec: Option<Frame>,
  pub number: u64,
396 397 398
  pub frame_type: FrameType,
  /// PSNR for Y, U, and V planes
  pub psnr: Option<(f64, f64, f64)>,
399 400 401 402
}

impl fmt::Display for Packet {
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
Luca Barbato's avatar
Luca Barbato committed
403 404 405 406 407 408 409
    write!(
      f,
      "Frame {} - {} - {} bytes",
      self.number,
      self.frame_type,
      self.data.len()
    )
410
  }
Luca Barbato's avatar
Luca Barbato committed
411 412 413 414
}

impl Context {
  pub fn new_frame(&self) -> Arc<Frame> {
Josh Holmer's avatar
Josh Holmer committed
415
    Arc::new(Frame::new(
416 417 418
      self.config.enc.width.align_power_of_two(3),
      self.config.enc.height.align_power_of_two(3),
      self.config.enc.chroma_sampling
Josh Holmer's avatar
Josh Holmer committed
419
    ))
Luca Barbato's avatar
Luca Barbato committed
420 421 422 423 424 425
  }

  pub fn send_frame<F>(&mut self, frame: F) -> Result<(), EncoderStatus>
  where
    F: Into<Option<Arc<Frame>>>
  {
Josh Holmer's avatar
Josh Holmer committed
426 427
    let idx = self.frame_count;
    self.frame_q.insert(idx, frame.into());
428
    self.frame_count += 1;
Luca Barbato's avatar
Luca Barbato committed
429 430 431
    Ok(())
  }

432 433 434 435
  pub fn get_frame_count(&self) -> u64 {
    self.frame_count
  }

436 437
  pub fn set_limit(&mut self, limit: u64) {
    self.limit = limit;
438 439
  }

Josh Holmer's avatar
Josh Holmer committed
440 441 442 443
  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)
  }

444
  pub fn needs_more_frames(&self, frame_count: u64) -> bool {
445
    self.limit == 0 || frame_count < self.limit
446 447
  }

448 449 450
  pub fn container_sequence_header(&mut self) -> Vec<u8> {
    fn sequence_header_inner(seq: &Sequence) -> io::Result<Vec<u8>> {
      let mut buf = Vec::new();
451

452
      {
453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469
        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
470
      }
471

472 473 474
      Ok(buf)
    }

Josh Holmer's avatar
Josh Holmer committed
475
    sequence_header_inner(&self.frame_data[&0].sequence).unwrap()
476 477
  }

Josh Holmer's avatar
Josh Holmer committed
478
  fn next_keyframe(&self) -> u64 {
Josh Holmer's avatar
Josh Holmer committed
479 480 481 482
    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
483 484 485 486 487
    if next_detected.is_none() {
      return next_limit;
    }
    cmp::min(next_detected.unwrap(), next_limit)
  }
fbossen's avatar
fbossen committed
488

489
  fn set_frame_properties(&mut self, idx: u64) -> bool {
490
    let (fi, end_of_subgop) = self.build_frame_properties(idx);
491 492 493
    self.frame_data.insert(idx, fi);

    end_of_subgop
Josh Holmer's avatar
Josh Holmer committed
494 495
  }

496
  fn build_frame_properties(&mut self, idx: u64) -> (FrameInvariants, bool) {
Josh Holmer's avatar
Josh Holmer committed
497
    if idx == 0 {
498
      let seq = Sequence::new(&self.config.enc);
499

Josh Holmer's avatar
Josh Holmer committed
500
      // The first frame will always be a key frame
Josh Holmer's avatar
Josh Holmer committed
501 502 503
      let fi = FrameInvariants::new_key_frame(
        &FrameInvariants::new(
          self.config.enc,
504
          seq
Josh Holmer's avatar
Josh Holmer committed
505 506 507
        ),
        0
      );
508
      return (fi, true);
Josh Holmer's avatar
Josh Holmer committed
509 510
    }

Josh Holmer's avatar
Josh Holmer committed
511 512
    let mut fi = self.frame_data[&(idx - 1)].clone();

Josh Holmer's avatar
Josh Holmer committed
513 514 515 516 517 518
    // 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
519
      let next_keyframe = self.next_keyframe();
520
      let (fi_temp, end_of_subgop) = FrameInvariants::new_inter_frame(
Josh Holmer's avatar
Josh Holmer committed
521
        &fi,
522 523 524 525
        self.segment_start_frame,
        idx_in_segment,
        next_keyframe
      );
Josh Holmer's avatar
Josh Holmer committed
526
      fi = fi_temp;
527
      if !end_of_subgop {
Josh Holmer's avatar
Josh Holmer committed
528 529 530
        if !fi.inter_cfg.unwrap().reorder
          || ((idx_in_segment - 1) % fi.inter_cfg.unwrap().group_len == 0
          && fi.number == (next_keyframe - 1))
531
        {
Josh Holmer's avatar
Josh Holmer committed
532
          self.segment_start_idx = idx;
Josh Holmer's avatar
Josh Holmer committed
533
          self.segment_start_frame = next_keyframe;
Josh Holmer's avatar
Josh Holmer committed
534
          fi.number = next_keyframe;
Josh Holmer's avatar
Josh Holmer committed
535
        } else {
536
          return (fi, false);
Josh Holmer's avatar
Josh Holmer committed
537 538
        }
      }
fbossen's avatar
fbossen committed
539
    }
Luca Barbato's avatar
Luca Barbato committed
540

541 542
    match self.frame_q.get(&fi.number) {
      Some(Some(_)) => {},
Josh Holmer's avatar
Josh Holmer committed
543
      _ => { return (fi, false); }
544 545
    }

Josh Holmer's avatar
Josh Holmer committed
546
    // Now that we know the frame number, look up the correct frame type
Josh Holmer's avatar
Josh Holmer committed
547 548 549 550 551 552 553
    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
554

Josh Holmer's avatar
Josh Holmer committed
555 556 557 558 559
    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();
560
      let (fi_temp, end_of_subgop) = FrameInvariants::new_inter_frame(
Josh Holmer's avatar
Josh Holmer committed
561 562 563 564 565 566
        &fi,
        self.segment_start_frame,
        idx_in_segment,
        next_keyframe
      );
      fi = fi_temp;
567 568
      if !end_of_subgop {
        return (fi, false);
Josh Holmer's avatar
Josh Holmer committed
569 570
      }
    }
571
    (fi, true)
fbossen's avatar
fbossen committed
572
  }
Luca Barbato's avatar
Luca Barbato committed
573

fbossen's avatar
fbossen committed
574
  pub fn receive_packet(&mut self) -> Result<Packet, EncoderStatus> {
575 576 577 578 579 580
    let idx = {
      let mut idx = self.idx;
      while !self.set_frame_properties(idx) {
        self.idx += 1;
        idx = self.idx;
      }
Luca Barbato's avatar
Luca Barbato committed
581

582 583 584 585 586 587
      if !self.needs_more_frames(self.frame_data.get(&idx).unwrap().number) {
        self.idx += 1;
        return Err(EncoderStatus::EnoughData);
      }
      idx
    };
588

589
    let ret = {
Luca Barbato's avatar
Luca Barbato committed
590 591 592
      let fi = self.frame_data.get_mut(&idx).unwrap();
      if fi.show_existing_frame {
        self.idx += 1;
Luca Barbato's avatar
Luca Barbato committed
593

Luca Barbato's avatar
Luca Barbato committed
594
        let mut fs = FrameState::new(fi);
fbossen's avatar
fbossen committed
595

Luca Barbato's avatar
Luca Barbato committed
596
        let data = encode_frame(fi, &mut fs);
Luca Barbato's avatar
Luca Barbato committed
597

Luca Barbato's avatar
Luca Barbato committed
598 599 600 601 602 603 604 605 606 607
        let rec = if fi.show_frame { Some(fs.rec) } else { None };
        let mut psnr = None;
        if self.config.enc.show_psnr {
          if let Some(ref rec) = rec {
            psnr = Some(calculate_frame_psnr(
              &*fs.input,
              rec,
              fi.sequence.bit_depth
            ));
          }
608
        }
Luca Barbato's avatar
Luca Barbato committed
609

Luca Barbato's avatar
Luca Barbato committed
610 611 612 613 614 615 616 617 618 619 620
        self.frames_processed += 1;
        Ok(Packet {
          data,
          rec,
          number: fi.number,
          frame_type: fi.frame_type,
          psnr
        })
      } else {
        if let Some(f) = self.frame_q.get(&fi.number) {
          self.idx += 1;
fbossen's avatar
fbossen committed
621

Luca Barbato's avatar
Luca Barbato committed
622 623
          if let Some(frame) = f {
            let mut fs = FrameState::new_with_frame(fi, frame.clone());
fbossen's avatar
fbossen committed
624

Luca Barbato's avatar
Luca Barbato committed
625 626
            let data = encode_frame(fi, &mut fs);
            self.packet_data.extend(data);
fbossen's avatar
fbossen committed
627

Luca Barbato's avatar
Luca Barbato committed
628
            fs.rec.pad(fi.width, fi.height);
fbossen's avatar
fbossen committed
629

Luca Barbato's avatar
Luca Barbato committed
630 631
            // TODO avoid the clone by having rec Arc.
            let rec = if fi.show_frame { Some(fs.rec.clone()) } else { None };
fbossen's avatar
fbossen committed
632

Luca Barbato's avatar
Luca Barbato committed
633
            update_rec_buffer(fi, fs);
fbossen's avatar
fbossen committed
634

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

Luca Barbato's avatar
Luca Barbato committed
639 640 641 642 643 644 645 646 647
              let mut psnr = None;
              if self.config.enc.show_psnr {
                if let Some(ref rec) = rec {
                  psnr = Some(calculate_frame_psnr(
                    &*frame,
                    rec,
                    fi.sequence.bit_depth
                  ));
                }
648 649
              }

Luca Barbato's avatar
Luca Barbato committed
650 651 652 653 654 655 656 657 658 659 660
              self.frames_processed += 1;
              Ok(Packet {
                data,
                rec,
                number: fi.number,
                frame_type: fi.frame_type,
                psnr
              })
            } else {
              Err(EncoderStatus::NeedMoreData)
            }
661 662 663
          } else {
            Err(EncoderStatus::NeedMoreData)
          }
fbossen's avatar
fbossen committed
664 665 666 667
        } else {
          Err(EncoderStatus::NeedMoreData)
        }
      }
668 669 670
    };

    if let Ok(ref pkt) = ret {
Luca Barbato's avatar
Luca Barbato committed
671
      self.garbage_collect(pkt.number);
672 673 674
    }

    ret
Luca Barbato's avatar
Luca Barbato committed
675 676
  }

677
  fn garbage_collect(&mut self, cur_frame: u64) {
Josh Holmer's avatar
Josh Holmer committed
678 679 680 681 682 683 684 685 686 687 688 689 690 691
    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
692
  pub fn flush(&mut self) {
fbossen's avatar
fbossen committed
693
    self.frame_q.insert(self.frame_count, None);
694
    self.frame_count += 1;
Luca Barbato's avatar
Luca Barbato committed
695
  }
Josh Holmer's avatar
Josh Holmer committed
696

Josh Holmer's avatar
Josh Holmer committed
697 698
  fn determine_frame_type(&mut self, frame_number: u64) -> FrameType {
    if frame_number == 0 {
Josh Holmer's avatar
Josh Holmer committed
699 700 701
      return FrameType::KEY;
    }

Josh Holmer's avatar
Josh Holmer committed
702 703 704 705 706 707 708 709
    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
710
    if let Some(frame) = frame {
Josh Holmer's avatar
Josh Holmer committed
711 712 713
      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
714 715
          // 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
716
          self.keyframe_detector.detect_scene_change(frame, frame_number as usize);
Josh Holmer's avatar
Josh Holmer committed
717 718 719
        }
        return FrameType::INTER;
      }
Josh Holmer's avatar
Josh Holmer committed
720
      if distance >= self.config.enc.max_key_frame_interval {
Josh Holmer's avatar
Josh Holmer committed
721 722
        return FrameType::KEY;
      }
Josh Holmer's avatar
Josh Holmer committed
723
      if self.keyframe_detector.detect_scene_change(frame, frame_number as usize) {
Josh Holmer's avatar
Josh Holmer committed
724 725 726 727 728
        return FrameType::KEY;
      }
    }
    FrameType::INTER
  }
Luca Barbato's avatar
Luca Barbato committed
729
}