com.intel.analytics.bigdl.models.autoencoder.Utils.scala Maven / Gradle / Ivy

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/*
 * Copyright 2016 The BigDL Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intel.analytics.bigdl.models.autoencoder

import java.nio.ByteBuffer
import java.nio.file.{Files, Path}

import com.intel.analytics.bigdl.dataset.ByteRecord

import scopt.OptionParser

object Utils {
  val trainMean = 0.13066047740239436
  val trainStd = 0.30810779333114624

  case class TrainParams(
    folder: String = "./",
    checkpoint: Option[String] = None,
    modelSnapshot: Option[String] = None,
    stateSnapshot: Option[String] = None,
    batchSize: Int = 150,
    maxEpoch: Int = 10,
    graphModel: Boolean = false
  )

  val trainParser = new OptionParser[TrainParams]("BigDL Autoencoder on MNIST") {
    opt[String]('f', "folder")
      .text("where you put the MNIST data")
      .action((x, c) => c.copy(folder = x))
    opt[String]("model")
      .text("model snapshot location")
      .action((x, c) => c.copy(modelSnapshot = Some(x)))
    opt[String]("state")
      .text("state snapshot location")
      .action((x, c) => c.copy(stateSnapshot = Some(x)))
    opt[String]("checkpoint")
      .text("where to cache the model and state")
      .action((x, c) => c.copy(checkpoint = Some(x)))
    opt[Int]('b', "batchSize")
      .text("batch size")
      .action((x, c) => c.copy(batchSize = x))
    opt[Int]('e', "maxEpoch")
      .text("max epoch")
      .action((x, c) => c.copy(maxEpoch = x))
    opt[Unit]('g', "graphModel")
      .text("use graph model")
      .action((x, c) => c.copy(graphModel = true))
  }

  private[bigdl] def load(featureFile: Path, labelFile: Path): Array[ByteRecord] = {
    val labelBuffer = ByteBuffer.wrap(Files.readAllBytes(labelFile))
    val featureBuffer = ByteBuffer.wrap(Files.readAllBytes(featureFile))
    val labelMagicNumber = labelBuffer.getInt()

    require(labelMagicNumber == 2049)
    val featureMagicNumber = featureBuffer.getInt()
    require(featureMagicNumber == 2051)

    val labelCount = labelBuffer.getInt()
    val featureCount = featureBuffer.getInt()
    require(labelCount == featureCount)

    val rowNum = featureBuffer.getInt()
    val colNum = featureBuffer.getInt()

    val result = new Array[ByteRecord](featureCount)
    var i = 0
    while (i < featureCount) {
      val img = new Array[Byte]((rowNum * colNum))
      var y = 0
      while (y < rowNum) {
        var x = 0
        while (x < colNum) {
          img(x + y * colNum) = featureBuffer.get()
          x += 1
        }
        y += 1
      }
      result(i) = ByteRecord(img, labelBuffer.get().toFloat + 1.0f)
      i += 1
    }

    result
  }
}