A debugging DataSource artifically limiting the available bandwidth.

Change-Id: I4ca75337a52599d211ea066fd94e649748df052d

1 files changed, 52 insertions, 0 deletions

diff --git a/media/libstagefright/include/ThrottledSource.h b/media/libstagefright/include/ThrottledSource.h
new file mode 100644
index 0000000..88164b3
--- /dev/null
+++ b/media/libstagefright/include/ThrottledSource.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2010 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 THROTTLED_SOURCE_H_
+
+#define THROTTLED_SOURCE_H_
+
+#include <media/stagefright/DataSource.h>
+#include <utils/threads.h>
+
+namespace android {
+
+struct ThrottledSource : public DataSource {
+    ThrottledSource(
+            const sp<DataSource> &source,
+            int32_t bandwidthLimitBytesPerSecond);
+
+    virtual status_t initCheck() const;
+
+    virtual ssize_t readAt(off_t offset, void *data, size_t size);
+
+    virtual status_t getSize(off_t *size);
+    virtual uint32_t flags();
+
+private:
+    Mutex mLock;
+
+    sp<DataSource> mSource;
+    int32_t mBandwidthLimitBytesPerSecond;
+    int64_t mStartTimeUs;
+    size_t mTotalTransferred;
+
+    ThrottledSource(const ThrottledSource &);
+    ThrottledSource &operator=(const ThrottledSource &);
+};
+
+}  // namespace android
+
+#endif  // THROTTLED_SOURCE_H_