1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "ZeroFilter"
19
20#include <media/stagefright/foundation/ABuffer.h>
21#include <media/stagefright/foundation/ADebug.h>
22#include <media/stagefright/foundation/AMessage.h>
23
24#include "ZeroFilter.h"
25
26namespace android {
27
28status_t ZeroFilter::setParameters(const sp<AMessage> &msg) {
29    sp<AMessage> params;
30    CHECK(msg->findMessage("params", &params));
31
32    int32_t invert;
33    if (params->findInt32("invert", &invert)) {
34        mInvertData = (invert != 0);
35    }
36
37    return OK;
38}
39
40status_t ZeroFilter::processBuffers(
41        const sp<ABuffer> &srcBuffer, const sp<ABuffer> &outBuffer) {
42    // assuming identical input & output buffers, since we're a copy filter
43    if (mInvertData) {
44        uint32_t* src = (uint32_t*)srcBuffer->data();
45        uint32_t* dest = (uint32_t*)outBuffer->data();
46        for (size_t i = 0; i < srcBuffer->size() / 4; ++i) {
47            *(dest++) = *(src++) ^ 0xFFFFFFFF;
48        }
49    } else {
50        memcpy(outBuffer->data(), srcBuffer->data(), srcBuffer->size());
51    }
52    outBuffer->setRange(0, srcBuffer->size());
53
54    return OK;
55}
56
57}   // namespace android
58