Added jpeg streaming classes.

- Provides streaming operations for decompressing/compressing
  JPEG files.
- Allows pixel operations to be performed on large JPEG images
  without holding the entire bitmap in memory.

Change-Id: I597ddf282b59d2ba6d6bca4722208121e3728f94

1 files changed, 38 insertions, 0 deletions

diff --git a/jni_jpegstream/src/inputstream_wrapper.h b/jni_jpegstream/src/inputstream_wrapper.h
new file mode 100644
index 000000000..ed9942bab
--- /dev/null
+++ b/jni_jpegstream/src/inputstream_wrapper.h
@@ -0,0 +1,38 @@
+/*
+ * 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 INPUTSTREAM_WRAPPER_H_
+#define INPUTSTREAM_WRAPPER_H_
+
+#include "jni_defines.h"
+#include "stream_wrapper.h"
+
+#include <stdint.h>
+
+class InputStreamWrapper : public StreamWrapper {
+public:
+    virtual int32_t read(int32_t length, int32_t offset);
+    virtual int64_t skip(int64_t count);
+    virtual int32_t forceReadEOI();
+
+    // Call this in JNI_OnLoad to cache read/skip method IDs
+    static void setReadSkipMethodIDs(jmethodID readID, jmethodID skipID);
+protected:
+    static jmethodID sReadID;
+    static jmethodID sSkipID;
+};
+
+#endif // INPUTSTREAM_WRAPPER_H_