///////////////////////////////////////////////////////////////////////////

//

// Copyright (c) 2011, Industrial Light & Magic, a division of Lucas

// Digital Ltd. LLC

//

// All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

// *       Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// *       Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

// *       Neither the name of Industrial Light & Magic nor the names of

// its contributors may be used to endorse or promote products derived

// from this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

///////////////////////////////////////////////////////////////////////////

#include <iostream>

#include <string>

#include <vector>

#include <stdio.h>

#include <stdlib.h>

#include <assert.h>

#include "tmpDir.h"

#include "testMultiScanlinePartThreading.h"

#include <ImfPartType.h>

#include <ImfMultiPartInputFile.h>

#include <ImfMultiPartOutputFile.h>

#include <ImfOutputFile.h>

#include <ImfTiledOutputFile.h>

#include <ImfGenericOutputFile.h>

#include <ImfArray.h>

#include <ImfChannelList.h>

#include <ImfOutputPart.h>

#include <ImfInputPart.h>

#include <ImfTiledOutputPart.h>

#include <ImfTiledInputPart.h>

#include <IlmThreadPool.h>

#include <IlmThreadMutex.h>

namespace IMF = OPENEXR_IMF_NAMESPACE;

using namespace IMF;

using namespace std;

using namespace IMATH_NAMESPACE;

using namespace ILMTHREAD_NAMESPACE;

namespace

{

const int height = 263;

const int width = 197;

vector<Header> headers;

template <class T>

void fillPixels (Array2D<T> &ph, int width, int height)

{

    ph.resizeErase(height, width);

    for (int y = 0; y < height; ++y)

        for (int x = 0; x < width; ++x)

        {

            //

            // We do this because half cannot store number bigger than 2048 exactly.

            //

            ph[y][x] = (y * width + x) % 2049;

        }

}

template <class T>

bool checkPixels (Array2D<T> &ph, int lx, int rx, int ly, int ry, int width)

{

    for (int y = ly; y <= ry; ++y)

        for (int x = lx; x <= rx; ++x)

            if (ph[y][x] != (y * width + x) % 2049)

            {

                cout << "value at " << x << ", " << y << ": " << ph[y][x]

                     << ", should be " << (y * width + x) % 2049 << endl << flush;

                return false;

            }

    return true;

}

template <class T>

bool checkPixels (Array2D<T> &ph, int width, int height)

{

    return checkPixels<T> (ph, 0, width - 1, 0, height - 1, width);

}

class WritingTask: public Task

{

    public:

        WritingTask (TaskGroup *group, OutputPart& part, int outputLines):

            Task(group),

            part(part),

            outputLines(outputLines)

        {}

        void execute()

        {

            for (int i = 0; i < outputLines; i++)

                part.writePixels();

        }

    private:

        OutputPart& part;

        int outputLines;

};

class ReadingTask: public Task

{

    public:

        ReadingTask (TaskGroup *group, InputPart& part, int startPos):

            Task(group),

            part(part),

            startPos(startPos)

        {}

        void execute()

        {

            int endPos = startPos + 9;

            if (endPos >= height) endPos = height - 1;

            part.readPixels(startPos, endPos);

        }

    private:

        InputPart& part;

        int startPos;

};

void setOutputFrameBuffer(FrameBuffer& frameBuffer, int pixelType,

                          Array2D<unsigned int>& uData, Array2D<float>& fData,

                          Array2D<half>& hData, int width)

{

    switch (pixelType)

    {

        case 0:

            frameBuffer.insert ("UINT",

                                Slice (IMF::UINT,

                                (char *) (&uData[0][0]),

                                sizeof (uData[0][0]) * 1,

                                sizeof (uData[0][0]) * width));

            break;

        case 1:

            frameBuffer.insert ("FLOAT",

                                Slice (IMF::FLOAT,

                                (char *) (&fData[0][0]),

                                sizeof (fData[0][0]) * 1,

                                sizeof (fData[0][0]) * width));

            break;

        case 2:

            frameBuffer.insert ("HALF",

                                Slice (IMF::HALF,

                                (char *) (&hData[0][0]),

                                sizeof (hData[0][0]) * 1,

                                sizeof (hData[0][0]) * width));

            break;

    }

}

void setInputFrameBuffer(FrameBuffer& frameBuffer, int pixelType,

                         Array2D<unsigned int>& uData, Array2D<float>& fData,

                         Array2D<half>& hData, int width, int height)

{

    switch (pixelType)

    {

        case 0:

            uData.resizeErase(height, width);

            frameBuffer.insert ("UINT",

                                Slice (IMF::UINT,

                                (char *) (&uData[0][0]),

                                sizeof (uData[0][0]) * 1,

                                sizeof (uData[0][0]) * width,

                                1, 1,

                                0));

            break;

        case 1:

            fData.resizeErase(height, width);

            frameBuffer.insert ("FLOAT",

                                Slice (IMF::FLOAT,

                                (char *) (&fData[0][0]),

                                sizeof (fData[0][0]) * 1,

                                sizeof (fData[0][0]) * width,

                                1, 1,

                                0));

            break;

        case 2:

            hData.resizeErase(height, width);

            frameBuffer.insert ("HALF",

                                Slice (IMF::HALF,

                                (char *) (&hData[0][0]),

                                sizeof (hData[0][0]) * 1,

                                sizeof (hData[0][0]) * width,

                                1, 1,

                                0));

            break;

    }

}

void

generateFiles (int pixelTypes[], const std::string & fn)

{

    //

    // Generate headers.

    //

    cout << "Generating headers " << flush;

    headers.clear();

    for (int i = 0; i < 2; i++)

    {

        Header header(width, height);

        int pixelType = pixelTypes[i];

        stringstream ss;

        ss << i;

        header.setName(ss.str());

        switch (pixelType)

        {

            case 0:

                header.channels().insert("UINT", Channel(IMF::UINT));

                break;

            case 1:

                header.channels().insert("FLOAT", Channel(IMF::FLOAT));

                break;

            case 2:

                header.channels().insert("HALF", Channel(IMF::HALF));

                break;

        }

        header.setType(SCANLINEIMAGE);

        headers.push_back(header);

    }

    //

    // Preparing.

    //

    cout << "Writing files " << flush;

    Array2D<half> halfData;

    Array2D<float> floatData;

    Array2D<unsigned int> uintData;

    fillPixels<unsigned int>(uintData, width, height);

    fillPixels<half>(halfData, width, height);

    fillPixels<float>(floatData, width, height);

    remove(fn.c_str());

    MultiPartOutputFile file(fn.c_str(), &headers[0],headers.size() );

    vector<OutputPart> parts;

    FrameBuffer frameBuffers[2];

    for (int i = 0; i < 2; i++)

    {

        OutputPart part(file, i);

        FrameBuffer& frameBuffer = frameBuffers[i];

        setOutputFrameBuffer(frameBuffer, pixelTypes[i], uintData, floatData, halfData, width);

        part.setFrameBuffer(frameBuffer);

        parts.push_back(part);

    }

    //

    // Writing tasks.

    //

    TaskGroup taskGroup;

    ThreadPool* threadPool = new ThreadPool(2);

    for (int i = 0; i < height / 10; i++)

    {

        threadPool->addTask((new WritingTask (&taskGroup, parts[0], 10)));

        threadPool->addTask((new WritingTask (&taskGroup, parts[1], 10)));

    }

    threadPool->addTask((new WritingTask (&taskGroup, parts[0], height % 10)));

    threadPool->addTask((new WritingTask (&taskGroup, parts[1], height % 10)));

    delete threadPool;

}

void

readFiles (int pixelTypes[], const std::string & fn)

{

    cout << "Checking headers " << flush;

    MultiPartInputFile file(fn.c_str());

    assert (file.parts() == 2);

    for (size_t i = 0; i < 2; i++)

    {

        const Header& header = file.header(i);

        assert (header.displayWindow() == headers[i].displayWindow());

        assert (header.dataWindow() == headers[i].dataWindow());

        assert (header.pixelAspectRatio() == headers[i].pixelAspectRatio());

        assert (header.screenWindowCenter() == headers[i].screenWindowCenter());

        assert (header.screenWindowWidth() == headers[i].screenWindowWidth());

        assert (header.lineOrder() == headers[i].lineOrder());

        assert (header.compression() == headers[i].compression());

        assert (header.channels() == headers[i].channels());

        assert (header.name() == headers[i].name());

        assert (header.type() == headers[i].type());

    }

    //

    // Preparing.

    //

    Array2D<unsigned int> uData[2];

    Array2D<float> fData[2];

    Array2D<half> hData[2];

    vector<InputPart> parts;

    FrameBuffer frameBuffers[2];

    for (int i = 0; i < 2; i++)

    {

        InputPart part(file, i);

        FrameBuffer& frameBuffer = frameBuffers[i];

        setInputFrameBuffer(frameBuffer, pixelTypes[i], uData[i], fData[i], hData[i], width, height);

        part.setFrameBuffer(frameBuffer);

        parts.push_back(part);

    }

    //

    // Reading files.

    //

    cout << "Reading files " << flush;

    TaskGroup taskGroup;

    ThreadPool* threadPool = new ThreadPool(2);

    for (int i = 0; i <= height / 10; i++)

    {

        threadPool->addTask((new ReadingTask (&taskGroup, parts[0], i * 10)));

        threadPool->addTask((new ReadingTask (&taskGroup, parts[1], i * 10)));

    }

    delete threadPool;

    //

    // Checking data.

    //

    cout << "Comparing" << endl << flush;

    for (int i = 0; i < 2; i++)

    {

        switch (pixelTypes[i])

        {

            case 0:

                assert(checkPixels<unsigned int>(uData[i], width, height));

                break;

            case 1:

                assert(checkPixels<float>(fData[i], width, height));

                break;

            case 2:

                assert(checkPixels<half>(hData[i], width, height));

                break;

        }

    }

}

void

testWriteRead (int pixelTypes[], const std::string & tempDir)

{

    std::string fn = tempDir +  "imf_test_multi_scanline_part_threading.exr";

    string typeNames[2];

    for (int i = 0; i < 2; i++)

    {

        switch (pixelTypes[i])

        {

            case 0:

                typeNames[i] = "unsigned int";

                break;

            case 1:

                typeNames[i] = "float";

                break;

            case 2:

                typeNames[i] = "half";

                break;

        }

    }

    cout << "part 1: " << typeNames[0] << " scanline part, "

         << "part 2: " << typeNames[1] << " scanline part. " << endl << flush;

    generateFiles (pixelTypes, fn);

    readFiles (pixelTypes, fn);

    remove (fn.c_str());

    cout << endl << flush;

}

} // namespace

void testMultiScanlinePartThreading (const std::string & tempDir)

{

    try

    {

        cout << "Testing the two threads reading/writing on two-scanline-part file" << endl;

        int numThreads = ThreadPool::globalThreadPool().numThreads();

        ThreadPool::globalThreadPool().setNumThreads(2);

        int pixelTypes[2];

        for (int i = 0; i < 3; i++)

            for (int j = 0; j < 3; j++)

            {

                pixelTypes[0] = i;

                pixelTypes[1] = j;

                testWriteRead (pixelTypes, tempDir);

            }

        ThreadPool::globalThreadPool().setNumThreads(numThreads);

        cout << "ok\n" << endl;

    }

    catch (const std::exception &e)

    {

        cerr << "ERROR -- caught exception: " << e.what() << endl;

        assert (false);

    }

}