#!/bin/bash
  # Copyright      2017   David Snyder
  #                2017   Johns Hopkins University (Author: Daniel Garcia-Romero)
  #                2017   Johns Hopkins University (Author: Daniel Povey)
  # Apache 2.0.
  #
  # See README.txt for more info on data required.
  # Results (mostly EERs) are inline in comments below.
  #
  # This example demonstrates a "bare bones" NIST SRE 2016 recipe using ivectors.
  # In the future, we will add score-normalization and a more effective form of
  # PLDA domain adaptation.
  
  . ./cmd.sh
  . ./path.sh
  set -e
  mfccdir=`pwd`/mfcc
  vaddir=`pwd`/mfcc
  
  # SRE16 trials
  sre16_trials=data/sre16_eval_test/trials
  sre16_trials_tgl=data/sre16_eval_test/trials_tgl
  sre16_trials_yue=data/sre16_eval_test/trials_yue
  
  stage=0
  if [ $stage -le 0 ]; then
    # Path to some, but not all of the training corpora
    data_root=/export/corpora/LDC
  
    # Prepare telephone and microphone speech from Mixer6.
    local/make_mx6.sh $data_root/LDC2013S03 data/
  
    # Prepare SRE10 test and enroll. Includes microphone interview speech.
    # NOTE: This corpus is now available through the LDC as LDC2017S06.
    local/make_sre10.pl /export/corpora5/SRE/SRE2010/eval/ data/
  
    # Prepare SRE08 test and enroll. Includes some microphone speech.
    local/make_sre08.pl $data_root/LDC2011S08 $data_root/LDC2011S05 data/
  
    # This prepares the older NIST SREs from 2004-2006.
    local/make_sre.sh $data_root data/
  
    # Combine all SREs prior to 2016 and Mixer6 into one dataset
    utils/combine_data.sh data/sre \
      data/sre2004 data/sre2005_train \
      data/sre2005_test data/sre2006_train \
      data/sre2006_test_1 data/sre2006_test_2 \
      data/sre08 data/mx6 data/sre10
    utils/validate_data_dir.sh --no-text --no-feats data/sre
    utils/fix_data_dir.sh data/sre
  
    # Prepare SWBD corpora.
    local/make_swbd_cellular1.pl $data_root/LDC2001S13 \
      data/swbd_cellular1_train
    local/make_swbd_cellular2.pl /export/corpora5/LDC/LDC2004S07 \
      data/swbd_cellular2_train
    local/make_swbd2_phase1.pl $data_root/LDC98S75 \
      data/swbd2_phase1_train
    local/make_swbd2_phase2.pl /export/corpora5/LDC/LDC99S79 \
      data/swbd2_phase2_train
    local/make_swbd2_phase3.pl /export/corpora5/LDC/LDC2002S06 \
      data/swbd2_phase3_train
  
    # Combine all SWB corpora into one dataset.
    utils/combine_data.sh data/swbd \
      data/swbd_cellular1_train data/swbd_cellular2_train \
      data/swbd2_phase1_train data/swbd2_phase2_train data/swbd2_phase3_train
  
    # Prepare NIST SRE 2016 evaluation data.
    local/make_sre16_eval.pl /export/corpora5/SRE/R149_0_1 data
  
    # Prepare unlabeled Cantonese and Tagalog development data. This dataset
    # was distributed to SRE participants.
    local/make_sre16_unlabeled.pl /export/corpora5/SRE/LDC2016E46_SRE16_Call_My_Net_Training_Data data
  fi
  
  if [ $stage -le 1 ]; then
    # Make MFCCs and compute the energy-based VAD for each dataset
    for name in sre swbd sre16_eval_enroll sre16_eval_test sre16_major; do
      steps/make_mfcc.sh --mfcc-config conf/mfcc.conf --nj 40 --cmd "$train_cmd" \
        data/${name} exp/make_mfcc $mfccdir
      utils/fix_data_dir.sh data/${name}
      sid/compute_vad_decision.sh --nj 40 --cmd "$train_cmd" \
        data/${name} exp/make_vad $vaddir
      utils/fix_data_dir.sh data/${name}
    done
  fi
  
  if [ $stage -le 2 ]; then
    # Train the UBM.
    sid/train_diag_ubm.sh --cmd "$train_cmd --mem 20G" \
      --nj 40 --num-threads 8  --subsample 1 \
      data/sre16_major 2048 \
      exp/diag_ubm
  
    sid/train_full_ubm.sh --cmd "$train_cmd --mem 25G" \
      --nj 40 --remove-low-count-gaussians false --subsample 1 \
      data/sre16_major \
      exp/diag_ubm exp/full_ubm
  fi
  
  if [ $stage -le 3 ]; then
    # Train the i-vector extractor.
    utils/combine_data.sh data/swbd_sre data/swbd data/sre
    sid/train_ivector_extractor.sh --cmd "$train_cmd --mem 35G" \
      --ivector-dim 600 \
      --num-iters 5 \
      exp/full_ubm/final.ubm data/swbd_sre \
      exp/extractor
  fi
  
  # In this section, we augment the SRE data with reverberation,
  # noise, music, and babble, and combined it with the clean SRE
  # data.  The combined list will be used to train the PLDA model.
  if [ $stage -le 4 ]; then
    utils/data/get_utt2num_frames.sh --nj 40 --cmd "$train_cmd" data/sre
    frame_shift=0.01
    awk -v frame_shift=$frame_shift '{print $1, $2*frame_shift;}' data/sre/utt2num_frames > data/sre/reco2dur
  
    if [ ! -d "RIRS_NOISES" ]; then
      # Download the package that includes the real RIRs, simulated RIRs, isotropic noises and point-source noises
      wget --no-check-certificate http://www.openslr.org/resources/28/rirs_noises.zip
      unzip rirs_noises.zip
    fi
  
    # Make a version with reverberated speech
    rvb_opts=()
    rvb_opts+=(--rir-set-parameters "0.5, RIRS_NOISES/simulated_rirs/smallroom/rir_list")
    rvb_opts+=(--rir-set-parameters "0.5, RIRS_NOISES/simulated_rirs/mediumroom/rir_list")
  
    # Make a reverberated version of the SRE list.  Note that we don't add any
    # additive noise here.
    steps/data/reverberate_data_dir.py \
      "${rvb_opts[@]}" \
      --speech-rvb-probability 1 \
      --pointsource-noise-addition-probability 0 \
      --isotropic-noise-addition-probability 0 \
      --num-replications 1 \
      --source-sampling-rate 8000 \
      data/sre data/sre_reverb
    cp data/sre/vad.scp data/sre_reverb/
    utils/copy_data_dir.sh --utt-suffix "-reverb" data/sre_reverb data/sre_reverb.new
    rm -rf data/sre_reverb
    mv data/sre_reverb.new data/sre_reverb
  
    # Prepare the MUSAN corpus, which consists of music, speech, and noise
    # suitable for augmentation.
    steps/data/make_musan.sh --sampling-rate 8000 /export/corpora/JHU/musan data
  
    # Get the duration of the MUSAN recordings.  This will be used by the
    # script augment_data_dir.py.
    for name in speech noise music; do
      utils/data/get_utt2dur.sh data/musan_${name}
      mv data/musan_${name}/utt2dur data/musan_${name}/reco2dur
    done
  
    # Augment with musan_noise
    steps/data/augment_data_dir.py --utt-suffix "noise" --fg-interval 1 --fg-snrs "15:10:5:0" --fg-noise-dir "data/musan_noise" data/sre data/sre_noise
    # Augment with musan_music
    steps/data/augment_data_dir.py --utt-suffix "music" --bg-snrs "15:10:8:5" --num-bg-noises "1" --bg-noise-dir "data/musan_music" data/sre data/sre_music
    # Augment with musan_speech
    steps/data/augment_data_dir.py --utt-suffix "babble" --bg-snrs "20:17:15:13" --num-bg-noises "3:4:5:6:7" --bg-noise-dir "data/musan_speech" data/sre data/sre_babble
  
    # Combine reverb, noise, music, and babble into one directory.
    utils/combine_data.sh data/sre_aug data/sre_reverb data/sre_noise data/sre_music data/sre_babble
  
    # Take a random subset of the augmentations (64k is roughly the size of the SRE dataset)
    utils/subset_data_dir.sh data/sre_aug 64000 data/sre_aug_64k
    utils/fix_data_dir.sh data/sre_aug_64k
  
    # Make MFCCs for the augmented data.  Note that we want we should alreay have the vad.scp
    # from the clean version at this point, which is identical to the clean version!
    steps/make_mfcc.sh --mfcc-config conf/mfcc.conf --nj 40 --cmd "$train_cmd" \
      data/sre_aug_64k exp/make_mfcc $mfccdir
  
    # Combine the clean and augmented SRE list.  This is now roughly
    # double the size of the original clean list.
    utils/combine_data.sh data/sre_combined data/sre_aug_64k data/sre
  fi
  
  if [ $stage -le 5 ]; then
    # Extract i-vectors for SRE data (includes Mixer 6). We'll use this for
    # things like LDA or PLDA.
    sid/extract_ivectors.sh --cmd "$train_cmd --mem 6G" --nj 40 \
      exp/extractor data/sre_combined \
      exp/ivectors_sre_combined
  
    # The SRE16 major is an unlabeled dataset consisting of Cantonese and
    # and Tagalog.  This is useful for things like centering, whitening and
    # score normalization.
    sid/extract_ivectors.sh --cmd "$train_cmd --mem 6G" --nj 40 \
      exp/extractor data/sre16_major \
      exp/ivectors_sre16_major
  
    # The SRE16 test data
    sid/extract_ivectors.sh --cmd "$train_cmd --mem 6G" --nj 40 \
      exp/extractor data/sre16_eval_test \
      exp/ivectors_sre16_eval_test
  
    # The SRE16 enroll data
    sid/extract_ivectors.sh --cmd "$train_cmd --mem 6G" --nj 40 \
      exp/extractor data/sre16_eval_enroll \
      exp/ivectors_sre16_eval_enroll
  fi
  
  if [ $stage -le 6 ]; then
    # Compute the mean vector for centering the evaluation i-vectors.
    $train_cmd exp/ivectors_sre16_major/log/compute_mean.log \
      ivector-mean scp:exp/ivectors_sre16_major/ivector.scp \
      exp/ivectors_sre16_major/mean.vec || exit 1;
  
    # This script uses LDA to decrease the dimensionality prior to PLDA.
    lda_dim=200
    $train_cmd exp/ivectors_sre_combined/log/lda.log \
      ivector-compute-lda --total-covariance-factor=0.0 --dim=$lda_dim \
      "ark:ivector-subtract-global-mean scp:exp/ivectors_sre_combined/ivector.scp ark:- |" \
      ark:data/sre_combined/utt2spk exp/ivectors_sre_combined/transform.mat || exit 1;
  
    #  Train the PLDA model.
    $train_cmd exp/ivectors_sre_combined/log/plda.log \
      ivector-compute-plda ark:data/sre_combined/spk2utt \
      "ark:ivector-subtract-global-mean scp:exp/ivectors_sre_combined/ivector.scp ark:- | transform-vec exp/ivectors_sre_combined/transform.mat ark:- ark:- | ivector-normalize-length ark:-  ark:- |" \
      exp/ivectors_sre_combined/plda || exit 1;
  
    # Here we adapt the out-of-domain PLDA model to SRE16 major, a pile
    # of unlabeled in-domain data.  In the future, we will include a clustering
    # based approach for domain adaptation.
    $train_cmd exp/ivectors_sre16_major/log/plda_adapt.log \
      ivector-adapt-plda --within-covar-scale=0.75 --between-covar-scale=0.25 \
      exp/ivectors_sre_combined/plda \
      "ark:ivector-subtract-global-mean scp:exp/ivectors_sre16_major/ivector.scp ark:- | transform-vec exp/ivectors_sre_combined/transform.mat ark:- ark:- | ivector-normalize-length ark:- ark:- |" \
      exp/ivectors_sre16_major/plda_adapt || exit 1;
  fi
  
  if [ $stage -le 7 ]; then
    # Get results using the out-of-domain PLDA model
    $train_cmd exp/scores/log/sre16_eval_scoring.log \
      ivector-plda-scoring --normalize-length=true \
      --num-utts=ark:exp/ivectors_sre16_eval_enroll/num_utts.ark \
      "ivector-copy-plda --smoothing=0.0 exp/ivectors_sre_combined/plda - |" \
      "ark:ivector-mean ark:data/sre16_eval_enroll/spk2utt scp:exp/ivectors_sre16_eval_enroll/ivector.scp ark:- | ivector-subtract-global-mean exp/ivectors_sre16_major/mean.vec ark:- ark:- | transform-vec exp/ivectors_sre_combined/transform.mat ark:- ark:- | ivector-normalize-length ark:- ark:- |" \
      "ark:ivector-subtract-global-mean exp/ivectors_sre16_major/mean.vec scp:exp/ivectors_sre16_eval_test/ivector.scp ark:- | transform-vec exp/ivectors_sre_combined/transform.mat ark:- ark:- | ivector-normalize-length ark:- ark:- |" \
      "cat '$sre16_trials' | cut -d\  --fields=1,2 |" exp/scores/sre16_eval_scores || exit 1;
  
    utils/filter_scp.pl $sre16_trials_tgl exp/scores/sre16_eval_scores > exp/scores/sre16_eval_tgl_scores
    utils/filter_scp.pl $sre16_trials_yue exp/scores/sre16_eval_scores > exp/scores/sre16_eval_yue_scores
    pooled_eer=$(paste $sre16_trials exp/scores/sre16_eval_scores | awk '{print $6, $3}' | compute-eer - 2>/dev/null)
    tgl_eer=$(paste $sre16_trials_tgl exp/scores/sre16_eval_tgl_scores | awk '{print $6, $3}' | compute-eer - 2>/dev/null)
    yue_eer=$(paste $sre16_trials_yue exp/scores/sre16_eval_yue_scores | awk '{print $6, $3}' | compute-eer - 2>/dev/null)
    echo "Using Out-of-Domain PLDA, EER: Pooled ${pooled_eer}%, Tagalog ${tgl_eer}%, Cantonese ${yue_eer}%"
    # EER: Pooled 13.65%, Tagalog 17.73%, Cantonese 9.612%
  fi
  
  if [ $stage -le 8 ]; then
    # Get results using an adapted PLDA model. In the future we'll replace
    # this (or add to this) with a clustering based approach to PLDA adaptation.
    $train_cmd exp/scores/log/sre16_eval_scoring_adapt.log \
      ivector-plda-scoring --normalize-length=true \
      --num-utts=ark:exp/ivectors_sre16_eval_enroll/num_utts.ark \
      "ivector-copy-plda --smoothing=0.0 exp/ivectors_sre16_major/plda_adapt - |" \
      "ark:ivector-mean ark:data/sre16_eval_enroll/spk2utt scp:exp/ivectors_sre16_eval_enroll/ivector.scp ark:- | ivector-subtract-global-mean exp/ivectors_sre16_major/mean.vec ark:- ark:- | transform-vec exp/ivectors_sre_combined/transform.mat ark:- ark:- | ivector-normalize-length ark:- ark:- |" \
      "ark:ivector-subtract-global-mean exp/ivectors_sre16_major/mean.vec scp:exp/ivectors_sre16_eval_test/ivector.scp ark:- | transform-vec exp/ivectors_sre_combined/transform.mat ark:- ark:- | ivector-normalize-length ark:- ark:- |" \
      "cat '$sre16_trials' | cut -d\  --fields=1,2 |" exp/scores/sre16_eval_scores_adapt || exit 1;
  
    utils/filter_scp.pl $sre16_trials_tgl exp/scores/sre16_eval_scores_adapt > exp/scores/sre16_eval_tgl_scores_adapt
    utils/filter_scp.pl $sre16_trials_yue exp/scores/sre16_eval_scores_adapt > exp/scores/sre16_eval_yue_scores_adapt
    pooled_eer=$(paste $sre16_trials exp/scores/sre16_eval_scores_adapt | awk '{print $6, $3}' | compute-eer - 2>/dev/null)
    tgl_eer=$(paste $sre16_trials_tgl exp/scores/sre16_eval_tgl_scores_adapt | awk '{print $6, $3}' | compute-eer - 2>/dev/null)
    yue_eer=$(paste $sre16_trials_yue exp/scores/sre16_eval_yue_scores_adapt | awk '{print $6, $3}' | compute-eer - 2>/dev/null)
    echo "Using Adapted PLDA, EER: Pooled ${pooled_eer}%, Tagalog ${tgl_eer}%, Cantonese ${yue_eer}%"
    # EER: Pooled 12.98%, Tagalog 17.8%, Cantonese 8.35%
    #
    # Using the official SRE16 scoring software, we obtain the following equalized results:
    #
    # -- Pooled --
    # EER:         13.08
    # min_Cprimary: 0.72
    # act_Cprimary: 0.73
  
    # -- Cantonese --
    # EER:          8.23
    # min_Cprimary: 0.59
    # act_Cprimary: 0.59
  
    # -- Tagalog --
    # EER:         17.87
    # min_Cprimary: 0.84
    # act_Cprimary: 0.87
  fi