# This config describes a CarneliNet model with 384 filters (CarneliNet-384) with CTC loss and word-piece tokenizer.
# The values in this config have tested on LibriSpeech dataset for effective batch size of 1K trained on 32 GPUs with AMP enabled.

# Larger and smaller models, e.g. CarneliNet-1024, can reuse the same architecture and config file. However, for larger model
# SpecAugment regularization is stronger and number of filters in epilog layer is also increased. Specifically for LibriSpeech dataset
# activation function and weight initialization policy also change for the largest of models. If a training dataset is much larger than
# LibriSpeech, Swish and tds_uniform parameters may show improvements even for CarneliNet-1024.
#
# The changes between models is captured in the following table. The rest of the parameters is the same across all models.
# +-----------------+---------+---------+------------+----------------+------------+
# | Model           | filters | encoder | activation | weight         | time_masks |
# |                 |         | final   |            | init_mode      |            |
# |                 |         | filters |            |                |            |
# +-----------------+---------+---------+------------+----------------+------------+
# | CarneliNet-256  | 256     | 640     | Swish      | tds_uniform    | 2          |
# +-----------------+---------+---------+------------+----------------+------------+
# | CarneliNet-384  | 384     | 640     | Swish      | tds_uniform    | 2          |
# +-----------------+---------+---------+------------+----------------+------------+
# | CarneliNet-512  | 512     | 640     | Swish      | tds_uniform    | 10         |
# +-----------------+---------+---------+------------+----------------+------------+
# | CarneliNet-768  | 768     | 1024    | ReLu       | xavier_uniform | 10         |
# +-----------------+---------+---------+------------+----------------+------------+
# | CarneliNet-1024 | 1024    | 1024    | ReLu       | xavier_uniform | 10         |
# +-----------------+---------+---------+------------+----------------+------------+
name: &name "CarneliNet-384-8x-Stride"

model:
  sample_rate: &sample_rate 16000

  train_ds:
    manifest_filepath: ???
    sample_rate: 16000
    batch_size: 32
    trim_silence: false
    use_start_end_token: false
    max_duration: 16.7
    shuffle: true
    num_workers: 8
    pin_memory: true
    # tarred datasets
    is_tarred: false
    tarred_audio_filepaths: null
    shuffle_n: 2048
    # bucketing params
    bucketing_strategy: "synced_randomized"
    bucketing_batch_size: null


  validation_ds:
    manifest_filepath: ???
    sample_rate: 16000
    batch_size: 32
    shuffle: false
    use_start_end_token: false
    num_workers: 8
    pin_memory: true

  test_ds:
    manifest_filepath: null
    sample_rate: 16000
    batch_size: 32
    shuffle: false
    use_start_end_token: false
    num_workers: 8
    pin_memory: true

  model_defaults:
    repeat: 5
    dropout: 0.1
    separable: true
    se: true
    se_context_size: -1
    se_repeat: false
    kernel_size: 11
    filters: 384
    encoder_final_filters: 640

  tokenizer:
    dir: ???  # path to directory which contains either tokenizer.model (bpe) or vocab.txt (for wpe)
    type: ???  # Can be either bpe or wpe

  preprocessor:
    _target_: nemo.collections.asr.modules.AudioToMelSpectrogramPreprocessor
    sample_rate: *sample_rate
    normalize: "per_feature"
    window_size: 0.025
    window_stride: 0.01
    window: "hann"
    features: &n_mels 80
    n_fft: 512
    frame_splicing: 1
    dither: 0.00001
    pad_to: 16
    stft_conv: false

  spec_augment:
    _target_: nemo.collections.asr.modules.SpectrogramAugmentation
    freq_masks: 2
    time_masks: 2
    freq_width: 27
    time_width: 0.05

  encoder:
    _target_: nemo.collections.asr.modules.ParallelConvASREncoder
    feat_in: *n_mels
    activation: swish
    init_mode: tds_uniform
    conv_mask: true

    jasper:
      - filters: ${model.model_defaults.filters}
        repeat: 1
        kernel: [5]
        stride: [1]
        dilation: [1]
        dropout: 0.0
        residual: false
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}

      - filters: ${model.model_defaults.filters}
        repeat: ${model.model_defaults.repeat}
        kernel: [5]
        stride: [2]
        dilation: [1]
        dropout: ${model.model_defaults.dropout}
        residual: true
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}
        stride_last: true
        residual_mode: "stride_add"

      - filters: ${model.model_defaults.filters}
        repeat: ${model.model_defaults.repeat}
        kernel: ["${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}"]
        stride: [1]
        dilation: [1]
        dropout: ${model.model_defaults.dropout}
        residual: true
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}

      - filters: ${model.model_defaults.filters}
        repeat: ${model.model_defaults.repeat}
        kernel: [7]
        stride: [2]  # *stride
        dilation: [1]
        dropout: ${model.model_defaults.dropout}
        residual: true
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}
        stride_last: true
        residual_mode: "stride_add"

      - filters: ${model.model_defaults.filters}
        repeat: ${model.model_defaults.repeat}
        kernel: ["${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}"]
        stride: [1]
        dilation: [1]
        dropout: ${model.model_defaults.dropout}
        residual: true
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}

      - filters: ${model.model_defaults.filters}
        repeat: ${model.model_defaults.repeat}
        kernel: [13]
        stride: [2]  # stride
        dilation: [1]
        dropout: ${model.model_defaults.dropout}
        residual: true
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}
        stride_last: true
        residual_mode: "stride_add"

      - filters: ${model.model_defaults.filters}
        repeat: ${model.model_defaults.repeat}
        kernel: ["${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}","${model.model_defaults.kernel_size}"]
        stride: [1]
        dilation: [1]
        dropout: ${model.model_defaults.dropout}
        residual: true
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}

      - filters: ${model.model_defaults.encoder_final_filters}
        repeat: 1
        kernel: ["${model.model_defaults.kernel_size}"]
        stride: [1]
        dilation: [1]
        dropout: 0.0
        residual: false
        separable: ${model.model_defaults.separable}
        se: ${model.model_defaults.se}
        se_context_size: ${model.model_defaults.se_context_size}
        se_repeat: ${model.model_defaults.se_repeat}


  decoder:
    _target_: nemo.collections.asr.modules.ConvASRDecoder
    feat_in: ${model.model_defaults.encoder_final_filters}
    num_classes: -1  # filled with vocabulary size from tokenizer at runtime
    vocabulary: []  # filled with vocabulary from tokenizer at runtime

  optim:
    name: novograd
    lr: 0.1

    # optimizer arguments
    betas: [0.8, 0.25]
    weight_decay: 0.001

    # scheduler setup
    sched:
      name: CosineAnnealing

      # scheduler config override
      warmup_steps: 1000
      warmup_ratio: null
      min_lr: 1e-5
      last_epoch: -1

trainer:
  devices: 1 # number of gpus
  max_epochs: 100
  max_steps: -1 # computed at runtime if not set
  num_nodes: 1
  accelerator: gpu
  strategy: ddp
  accumulate_grad_batches: 1
  enable_checkpointing: False  # Provided by exp_manager
  logger: false  # Provided by exp_manager
  log_every_n_steps: 50  # Interval of logging.
  val_check_interval: 1.0 # Set to 0.25 to check 4 times per epoch, or an int for number of iterations
  precision: 32 # If AMP is available, change to 16 to gain training speed increase and lower memory consumption (preferred).
  sync_batchnorm: false
  benchmark: false # needs to be false for models with variable-length speech input as it slows down training

exp_manager:
  exp_dir: null
  name: *name
  create_tensorboard_logger: true
  create_checkpoint_callback: true
  checkpoint_callback_params:
    monitor: "val_wer"
    mode: "min"
    always_save_nemo: true
  create_wandb_logger: false
  wandb_logger_kwargs:
    name: null
    project: null
    entity: null
  resume_if_exists: false
  resume_ignore_no_checkpoint: false

hydra:
  run:
    dir: .
  job_logging:
    root:
      handlers: null