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/*  Copyright (c) 2010-2013  hkrn                                    */
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#include "vpvl2/vpvl2.h"
#include "vpvl2/internal/util.h"

#include "vpvl2/mvd/EffectKeyframe.h"
#include "vpvl2/mvd/EffectSection.h"

namespace vpvl2
{
namespace mvd
{

#pragma pack(push, 1)

struct EffectSectionHeader {
    int reserved;
    int sizeOfKeyframe;
    int countOfKeyframes;
    int parameterSize;
    int parameterCount;
};

struct EffectParameter {
    int pid;
    int type;
};

#pragma pack(pop)

class EffectSection::PrivateContext : public BaseSectionContext {
public:
    PrivateContext()
    {
    }
    ~PrivateContext() {
    }
};

EffectSection::EffectSection(const Motion *motionRef)
    : BaseSection(motionRef),
      m_context(0)
{
    m_context = new EffectSection::PrivateContext();
}

EffectSection::~EffectSection()
{
    delete m_context;
    m_context = 0;
}

bool EffectSection::preparse(uint8_t *&ptr, size_t &rest, Motion::DataInfo &info)
{
    EffectSectionHeader header;
    if (!internal::validateSize(ptr, sizeof(header), rest)) {
        return false;
    }
    internal::getData(ptr - sizeof(header), header);
    const int nparameters = header.parameterCount;
    const size_t parameterArraySize = nparameters * sizeof(int);
    if (!internal::validateSize(ptr, parameterArraySize, rest)) {
        return false;
    }
    if (!internal::validateSize(ptr, header.parameterSize - 8 * nparameters - 4, rest)) {
        return false;
    }
    const int nkeyframes = header.countOfKeyframes;
    const size_t reserved = header.sizeOfKeyframe - (EffectKeyframe::size() + parameterArraySize);
    for (int i = 0; i < nkeyframes; i++) {
        if (!EffectKeyframe::preparse(ptr, rest, reserved, info)) {
            return false;
        }
    }
    return true;
}

void EffectSection::read(const uint8_t * /* data */)
{
}

void EffectSection::seek(const IKeyframe::TimeIndex &timeIndex)
{
    saveCurrentTimeIndex(timeIndex);
}

void EffectSection::write(uint8_t * /* data */) const
{
}

size_t EffectSection::estimateSize() const
{
    return 0;
}

size_t EffectSection::countKeyframes() const
{
    return m_context->keyframes.count();
}

void EffectSection::addKeyframe(IKeyframe *keyframe)
{
    m_context->keyframes.append(keyframe);
    setMaxTimeIndex(keyframe);
}

void EffectSection::deleteKeyframe(IKeyframe *&keyframe)
{
    m_context->keyframes.remove(keyframe);
    delete keyframe;
    keyframe = 0;
}

void EffectSection::getKeyframes(const IKeyframe::TimeIndex & /* timeIndex */,
                                 const IKeyframe::LayerIndex & /* layerIndex */,
                                 Array<IKeyframe *> & /* keyframes */)
{
}

int EffectSection::countLayers(const IString * /* name */) const
{
    return 1;
}

IEffectKeyframe *EffectSection::findKeyframe(const IKeyframe::TimeIndex &timeIndex,
                                             const IString * /* name */,
                                             const IKeyframe::LayerIndex &layerIndex) const
{
    const PrivateContext::KeyframeCollection &keyframes = m_context->keyframes;
    const int nkeyframes = keyframes.count();
    for (int i = 0; i < nkeyframes; i++) {
        EffectKeyframe *keyframe = reinterpret_cast<EffectKeyframe *>(keyframes[i]);
        if (keyframe->timeIndex() == timeIndex && keyframe->layerIndex() == layerIndex) {
            return keyframe;
        }
    }
    return 0;
}

IEffectKeyframe *EffectSection::findKeyframeAt(int index) const
{
    const PrivateContext::KeyframeCollection &keyframes = m_context->keyframes;
    if (internal::checkBound(index, 0, keyframes.count())) {
        EffectKeyframe *keyframe = reinterpret_cast<EffectKeyframe *>(keyframes[index]);
        return keyframe;
    }
    return 0;
}

} /* namespace mvd */
} /* namespace vpvl2 */
