-- Copyright 2016 TensorFlow 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.
-- | Conduit wrappers for TensorFlow.Records.
{-# LANGUAGE Rank2Types #-}
module TensorFlow.Records.Conduit
(
-- * Encode/Decode
encodeTFRecords
, decodeTFRecords
-- * Source/Sink
, sinkTFRecords
, sourceTFRecords
) where
import Control.Monad.Catch (MonadThrow)
import Control.Monad.Trans.Resource (MonadResource)
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as BL
import Data.Conduit ((=$=), Conduit, Consumer, Producer)
import Data.Conduit.Binary (sinkFile, sourceFile)
import Data.Conduit.Cereal (conduitGet2, conduitPut)
import TensorFlow.Records (getTFRecord, putTFRecord)
-- | Decode TFRecords from a stream of bytes.
decodeTFRecords :: MonadThrow m => Conduit B.ByteString m BL.ByteString
decodeTFRecords = conduitGet2 getTFRecord
-- | Read TFRecords from a file.
sourceTFRecords :: (MonadResource m, MonadThrow m) => FilePath -> Producer m BL.ByteString
sourceTFRecords path = sourceFile path =$= decodeTFRecords
-- | Encode TFRecords to a stream of bytes.
encodeTFRecords :: Monad m => Conduit BL.ByteString m B.ByteString
encodeTFRecords = conduitPut putTFRecord
-- | Write TFRecords to a file.
sinkTFRecords :: (MonadResource m) => FilePath -> Consumer BL.ByteString m ()
sinkTFRecords path = encodeTFRecords =$= sinkFile path