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, 43 insertions, 0 deletions

diff --git a/jni_jpegstream/src/jerr_hook.h b/jni_jpegstream/src/jerr_hook.h
new file mode 100644
index 000000000..f2ba7cd03
--- /dev/null
+++ b/jni_jpegstream/src/jerr_hook.h
@@ -0,0 +1,43 @@
+/*
+ * 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 JERR_HOOK_H_
+#define JERR_HOOK_H_
+
+extern "C" {
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jerror.h"
+}
+
+#include <setjmp.h>
+
+/**
+ * ErrManager replaces libjpeg's default error handling with
+ * the following behavior:
+ * - libjpeg function calls return to the position set by
+ *   setjmp for error cleanup.
+ * - libjpeg error and warning messages are printed to
+ *   logcat's error output.
+ */
+typedef struct {
+    struct jpeg_error_mgr mgr;
+    jmp_buf setjmp_buf;
+} ErrManager;
+
+void SetupErrMgr(j_common_ptr cinfo, ErrManager* errMgr);
+
+#endif // JERR_HOOK_H_