140 lines
3.8 KiB
C++
140 lines
3.8 KiB
C++
/******************************************************************************
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*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#ifndef __EXTRACTOR_FUZZER_BASE_H__
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#define __EXTRACTOR_FUZZER_BASE_H__
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#include <media/DataSource.h>
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#include <media/MediaExtractorPluginHelper.h>
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#include <media/stagefright/MediaBufferGroup.h>
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#include <vector>
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extern "C" {
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android::ExtractorDef GETEXTRACTORDEF();
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}
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constexpr int32_t kFuzzerMaxSeekPointsCount = 5;
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namespace android {
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class ExtractorFuzzerBase {
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public:
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ExtractorFuzzerBase() = default;
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virtual ~ExtractorFuzzerBase() {
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if (mExtractor) {
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delete mExtractor;
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mExtractor = nullptr;
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}
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if (mBufferSource) {
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mBufferSource.clear();
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mBufferSource = nullptr;
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}
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}
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/** Function to create the media extractor component.
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* To be implemented by the derived class.
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*/
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virtual bool createExtractor() = 0;
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/** Parent class functions to be reused by derived class.
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* These are common for all media extractor components.
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*/
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bool setDataSource(const uint8_t* data, size_t size);
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void getExtractorDef();
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void extractTracks();
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void getMetadata();
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void getTracksMetadata();
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void setDataSourceFlags(uint32_t flags);
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void seekAndExtractTracks();
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void processData(const uint8_t* data, size_t size);
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protected:
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class BufferSource : public DataSource {
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public:
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BufferSource(const uint8_t* data, size_t length) : mData(data), mLength(length) {}
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virtual ~BufferSource() { mData = nullptr; }
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void setFlags(uint32_t flags) { mFlags = flags; }
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uint32_t flags() { return mFlags; }
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status_t initCheck() const { return mData != nullptr ? OK : NO_INIT; }
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ssize_t readAt(off64_t offset, void* data, size_t size) {
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if (!mData) {
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return NO_INIT;
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}
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Mutex::Autolock autoLock(mLock);
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if ((offset >= static_cast<off64_t>(mLength)) || (offset < 0)) {
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return 0; // read beyond bounds.
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}
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size_t numAvailable = mLength - static_cast<size_t>(offset);
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if (size > numAvailable) {
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size = numAvailable;
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}
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return readAt_l(offset, data, size);
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}
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status_t getSize(off64_t* size) {
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if (!mData) {
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return NO_INIT;
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}
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Mutex::Autolock autoLock(mLock);
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*size = static_cast<off64_t>(mLength);
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return OK;
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}
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protected:
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ssize_t readAt_l(off64_t offset, void* data, size_t size) {
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void* result = memcpy(data, mData + offset, size);
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return result != nullptr ? size : 0;
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}
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const uint8_t* mData = nullptr;
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size_t mLength = 0;
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Mutex mLock;
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uint32_t mFlags = 0;
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private:
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DISALLOW_EVIL_CONSTRUCTORS(BufferSource);
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};
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sp<BufferSource> mBufferSource;
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DataSource* mDataSource = nullptr;
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MediaExtractorPluginHelper* mExtractor = nullptr;
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virtual void extractTrack(MediaTrackHelper* track, MediaBufferGroup* bufferGroup);
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virtual void seekAndExtractTrack(MediaTrackHelper* track, MediaBufferGroup* bufferGroup,
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int64_t trackDuration);
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};
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} // namespace android
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#endif // __EXTRACTOR_FUZZER_BASE_H__
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