1 files changed, 57 insertions, 0 deletions
diff --git a/media/libstagefright/filters/ZeroFilter.cpp b/media/libstagefright/filters/ZeroFilter.cpp
new file mode 100644
index 0000000..3f1243c
--- /dev/null
+++ b/media/libstagefright/filters/ZeroFilter.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "ZeroFilter"
+
+#include <media/stagefright/foundation/ABuffer.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/foundation/AMessage.h>
+
+#include "ZeroFilter.h"
+
+namespace android {
+
+status_t ZeroFilter::setParameters(const sp<AMessage> &msg) {
+    sp<AMessage> params;
+    CHECK(msg->findMessage("params", &params));
+
+    int32_t invert;
+    if (params->findInt32("invert", &invert)) {
+        mInvertData = (invert != 0);
+    }
+
+    return OK;
+}
+
+status_t ZeroFilter::processBuffers(
+        const sp<ABuffer> &srcBuffer, const sp<ABuffer> &outBuffer) {
+    // assuming identical input & output buffers, since we're a copy filter
+    if (mInvertData) {
+        uint32_t* src = (uint32_t*)srcBuffer->data();
+        uint32_t* dest = (uint32_t*)outBuffer->data();
+        for (size_t i = 0; i < srcBuffer->size() / 4; ++i) {
+            *(dest++) = *(src++) ^ 0xFFFFFFFF;
+        }
+    } else {
+        memcpy(outBuffer->data(), srcBuffer->data(), srcBuffer->size());
+    }
+    outBuffer->setRange(0, srcBuffer->size());
+
+    return OK;
+}
+
+}   // namespace android