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diff --git a/jni_jpegstream/src/jpeg_reader.h b/jni_jpegstream/src/jpeg_reader.h
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+++ b/jni_jpegstream/src/jpeg_reader.h
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+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * 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.
+ */
+#ifndef JPEG_READER_H_
+#define JPEG_READER_H_
+
+#include "jerr_hook.h"
+#include "jni_defines.h"
+#include "jpeg_config.h"
+
+#include <stdint.h>
+
+/**
+ * JpegReader wraps libjpeg's decompression functionality and a
+ * java InputStream object.  Read calls return data from the
+ * InputStream that has been decompressed.
+ */
+class JpegReader {
+public:
+    JpegReader();
+    ~JpegReader();
+
+    /**
+     * Call setup with a valid InputStream reference and pixel format.
+     * If this method is successful, the contents of width and height will
+     * be set to the dimensions of the bitmap to be read.
+     *
+     * ***This method will result in the jpeg file header being read
+     * from the InputStream***
+     *
+     * Returns J_SUCCESS on success or a negative error code.
+     */
+    int32_t setup(JNIEnv *env, jobject in, int32_t* width, int32_t* height,
+            Jpeg_Config::Format format);
+
+    /**
+     * Decompresses bytes from the InputStream and writes at most count
+     * bytes into the buffer, bytes, starting at some offset.  Passing a
+     * NULL as the bytes pointer effectively skips those bytes.
+     *
+     * ***This method will result in bytes being read from the InputStream***
+     *
+     * Returns the number of bytes written into the input buffer or a
+     * negative error code.
+     */
+    int32_t read(int8_t * bytes, int32_t offset, int32_t count);
+
+    /**
+     * Updates the environment pointer.  Call this before read or reset
+     * in any jni function call.
+     */
+    void updateEnv(JNIEnv *env);
+
+    /**
+     * Frees any java global references held by the JpegReader, destroys
+     * the decompress structure, and frees allocations in libjpeg's pools.
+     */
+    int32_t reset();
+
+private:
+    void formatPixels(uint8_t* buf, int32_t len);
+    struct jpeg_decompress_struct mInfo;
+    ErrManager mErrorManager;
+
+    JSAMPLE* mScanlineBuf;
+    JSAMPLE* mScanlineIter;
+    int32_t mScanlineBuflen;
+    int32_t mScanlineUnformattedBuflen;
+    int32_t mScanlineBytesRemaining;
+
+    Jpeg_Config::Format mFormat;
+    bool mFinished;
+    bool mSetup;
+};
+
+#endif // JPEG_READER_H_