#include <string.h>//memset/memcpy
#include <time.h>
#include "utils/DataGenerator.h"
#include "utils/BufferedData.h"
#include "utils/FileInputStream.h"

using namespace std;


bool YUVPixelDataGenerator( uint8_t* pPointer, int32_t iWidth, int32_t iHeight, int32_t iStride )
{
#define SRC_FRAME_WIDTH (160)
#define SRC_FRAME_HEIGHT (96)

  if ( SRC_FRAME_WIDTH-iWidth <= 0 || SRC_FRAME_HEIGHT-iHeight <= 0 ) {
    return false;
  }

  const int32_t kiFrameSize = SRC_FRAME_WIDTH*SRC_FRAME_HEIGHT;
  BufferedData sBuf;
  sBuf.SetLength(kiFrameSize);
  if (sBuf.Length() != kiFrameSize) {
    return false;
  }

  FileInputStream fileStream;
  if (!fileStream.Open("res/CiscoVT2people_160x96_6fps.yuv")) {
    return false;
  }
  if (fileStream.read(sBuf.data(), kiFrameSize) == kiFrameSize) {
    srand((uint32_t)time(NULL));
    int32_t iStartPosX = rand()%(SRC_FRAME_WIDTH-iWidth);
    int32_t iStartPosY = rand()%(SRC_FRAME_HEIGHT-iHeight);
    uint8_t* pSrcPointer = sBuf.data() + iStartPosX + iStartPosY*SRC_FRAME_WIDTH;
    uint8_t* pLocalPointer = pPointer;

    for (int j=0;j<iHeight;j++) {
      memcpy(pLocalPointer, pSrcPointer, iWidth*sizeof(uint8_t));
      pLocalPointer += iStride;
      pSrcPointer += SRC_FRAME_WIDTH;
    }
    return true;
  }
  return false;
}

void RandomPixelDataGenerator( uint8_t* pPointer, int32_t iWidth, int32_t iHeight, int32_t iStride )
{
  uint8_t* pLocalPointer = pPointer;
  for (int32_t j=0;j<iHeight;j++) {
    for (int32_t i=0;i<iWidth;i++) {
      pLocalPointer[i] = rand()%256;
    }
    pLocalPointer += iStride;
  }
}


void RandomResidueDataGenerator( uint16_t* pPointer, int32_t iWidth, int32_t iHeight, int32_t iStride )
{
}

void RandomCoeffDataGenerator( uint16_t* pPointer, int32_t iWidth, int32_t iHeight, int32_t iStride )
{
}