IntrinsicBlurFilter.cpp revision e7f4e676bb88b17241d71731f9ea50c18cfcb039 
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 "IntrinsicBlurFilter"
19
20#include <utils/Log.h>
21
22#include <media/stagefright/foundation/ABuffer.h>
23#include <media/stagefright/foundation/ADebug.h>
24#include <media/stagefright/foundation/AMessage.h>
25
26#include "IntrinsicBlurFilter.h"
27
28namespace android {
29
30status_t IntrinsicBlurFilter::start() {
31    // TODO: use a single RS context object for entire application
32    mRS = new RSC::RS();
33
34    if (!mRS->init(mCacheDir.c_str())) {
35        ALOGE("Failed to initialize RenderScript context.");
36        return NO_INIT;
37    }
38
39    // 32-bit elements for ARGB8888
40    RSC::sp<const RSC::Element> e = RSC::Element::U8_4(mRS);
41
42    RSC::Type::Builder tb(mRS, e);
43    tb.setX(mWidth);
44    tb.setY(mHeight);
45    RSC::sp<const RSC::Type> t = tb.create();
46
47    mAllocIn = RSC::Allocation::createTyped(mRS, t);
48    mAllocOut = RSC::Allocation::createTyped(mRS, t);
49
50    mBlur = RSC::ScriptIntrinsicBlur::create(mRS, e);
51    mBlur->setRadius(mBlurRadius);
52    mBlur->setInput(mAllocIn);
53
54    return OK;
55}
56
57void IntrinsicBlurFilter::reset() {
58    mBlur.clear();
59    mAllocOut.clear();
60    mAllocIn.clear();
61    mRS.clear();
62}
63
64status_t IntrinsicBlurFilter::setParameters(const sp<AMessage> &msg) {
65    sp<AMessage> params;
66    CHECK(msg->findMessage("params", &params));
67
68    float blurRadius;
69    if (params->findFloat("blur-radius", &blurRadius)) {
70        mBlurRadius = blurRadius;
71    }
72
73    return OK;
74}
75
76status_t IntrinsicBlurFilter::processBuffers(
77        const sp<ABuffer> &srcBuffer, const sp<ABuffer> &outBuffer) {
78    mAllocIn->copy1DRangeFrom(0, mWidth * mHeight, srcBuffer->data());
79    mBlur->forEach(mAllocOut);
80    mAllocOut->copy1DRangeTo(0, mWidth * mHeight, outBuffer->data());
81
82    return OK;
83}
84
85}   // namespace android
86