media/ndk/NdkImagePriv.h

/*
 * Copyright (C) 2016 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 _NDK_IMAGE_PRIV_H
#define _NDK_IMAGE_PRIV_H

#include <inttypes.h>
#include <utils/Log.h>
#include <utils/StrongPointer.h>

#include <gui/BufferItem.h>
#include <gui/CpuConsumer.h>

#include "NdkImageReaderPriv.h"
#include "NdkImage.h"


using namespace android;

// TODO: this only supports ImageReader
struct AImage {
    AImage(AImageReader* reader, int32_t format, uint64_t usage,
           BufferItem* buffer, int64_t timestamp,
           int32_t width, int32_t height, int32_t numPlanes);

    // free all resources while keeping object alive. Caller must obtain reader lock
    void close();

    // Remove from object memory. Must be called after close
    void free();

    bool isClosed() const ;

    // only For AImage to grab reader lock
    // Always grab reader lock before grabbing image lock
    void lockReader() const;
    void unlockReader() const;

    media_status_t getWidth(/*out*/int32_t* width) const;
    media_status_t getHeight(/*out*/int32_t* height) const;
    media_status_t getFormat(/*out*/int32_t* format) const;
    media_status_t getNumPlanes(/*out*/int32_t* numPlanes) const;
    media_status_t getTimestamp(/*out*/int64_t* timestamp) const;

    media_status_t lockImage();
    media_status_t unlockImageIfLocked(/*out*/int* fenceFd);

    media_status_t getPlanePixelStride(int planeIdx, /*out*/int32_t* pixelStride) const;
    media_status_t getPlaneRowStride(int planeIdx, /*out*/int32_t* rowStride) const;
    media_status_t getPlaneData(int planeIdx,/*out*/uint8_t** data, /*out*/int* dataLength) const;

  private:
    // AImage should be deleted through free() API.
    ~AImage();

    friend struct AImageReader; // for reader to access mBuffer

    uint32_t getJpegSize() const;

    // When reader is close, AImage will only accept close API call
    wp<AImageReader>           mReader;
    const int32_t              mFormat;
    const uint64_t             mUsage;  // AHARDWAREBUFFER_USAGE0* flags.
    BufferItem*                mBuffer;
    std::unique_ptr<CpuConsumer::LockedBuffer> mLockedBuffer;
    const int64_t              mTimestamp;
    const int32_t              mWidth;
    const int32_t              mHeight;
    const int32_t              mNumPlanes;
    bool                       mIsClosed = false;
    mutable Mutex              mLock;
};

#endif // _NDK_IMAGE_PRIV_H