/**
* @brief draw the image after scaling it
* @param hFile: pointer to the image file
* @param Enlarge: 0 = window mode
* 1 = full screen mode
* @param type: specify the image type
* this parameter can be:
* - IMAGE_TYPE_JPG
* - IMAGE_TYPE_BMP
* @retval None
*/
static int _DrawImage(FIL *hFile, uint8_t Enlarge, uint8_t type)
{
int XPos, YPos, XSize, YSize, nx, ny, n;
GUI_JPEG_INFO Info;
if(type == IMAGE_TYPE_BMP)
{
Info.XSize = GUI_BMP_GetXSizeEx(_GetData, hFile);
Info.YSize = GUI_BMP_GetYSizeEx(_GetData, hFile);
}
else if (type == IMAGE_TYPE_JPG)
{
GUI_JPEG_GetInfoEx(_GetData, hFile, &Info);
}
if((Info.XSize == 0) || (Info.YSize == 0) ||
(Info.XSize > 1024) || (Info.YSize > 768))
{
return 1;
}
if(Enlarge == 0)
{
nx = 220000 / Info.XSize;
ny = 134000 / Info.YSize;
}
else
{
nx = 320000 / Info.XSize;
ny = 240000 / Info.YSize;
}
if (nx < ny) {
n = nx;
} else {
n = ny;
}
XSize = Info.XSize * n / 1000;
YSize = Info.YSize * n / 1000;
if(Enlarge == 0)
{
XPos = (220 - XSize) / 2;
YPos = (134 - YSize) / 2;
}
else
{
XPos = (320 - XSize) / 2;
YPos = (240 - YSize) / 2;
}
if(type == IMAGE_TYPE_BMP)
{
return GUI_BMP_DrawScaledEx(_GetData, hFile, XPos, YPos, n, 1000);
}
else if (type == IMAGE_TYPE_JPG)
{
return GUI_JPEG_DrawScaledEx(_GetData, hFile, XPos, YPos, n, 1000);
}
return 0;
}
/*********************************************************************
*
* _DrawJPEG
*/
static void _DrawJPEG(const char * sFilename) {
int XPos, YPos, XSize, YSize, nx, ny, n;
HANDLE hFile;
GUI_JPEG_INFO Info;
hFile = CreateFile(sFilename, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
GUI_JPEG_GetInfoEx(_GetData, &hFile, &Info);
GUI_ClearRect(0, 60, 319, 239);
nx = 320000 / Info.XSize;
ny = 180000 / Info.YSize;
if (nx < ny) {
n = nx;
} else {
n = ny;
}
XSize = Info.XSize * n / 1000;
YSize = Info.YSize * n / 1000;
XPos = (320 - XSize) / 2;
YPos = (180 - YSize) / 2 + 60;
if (n > 1000) {
int temp=0;
}
GUI_JPEG_DrawScaledEx(_GetData, &hFile, XPos, YPos, n, 1000);
GUI_Delay(1000);
CloseHandle(hFile);
}
/**
* @brief draw the image after scaling it
* @param hFile: pointer to the MJPEG file
* @retval None
*/
static int _PlayMJPEG(FIL *hFile)
{
unsigned int NumBytesRead;
char *ptr;
int timeout = 0xFFFF;
static int counter = 0;
GUI_JPEG_INFO video_info;
f_lseek(hFile, ImageOffset);
t0 = GUI_GetTime();
s0 = hFile->fptr;
if(VIDEO_Enlarge == 1)
{
GUI_JPEG_DrawEx(_GetData, hFile, 0, 0);
}
else
{
GUI_JPEG_DrawScaledEx(_GetData, hFile, 7, 2, 2, 3);
}
if(counter ++ > 20 )
{
frame_average_size = (hFile->fptr - s0 + frame_average_size)/2;
frame_average_period = (GUI_GetTime() - t0 + frame_average_period)/2;
counter = 0;
}
if(frame_average_size != 0)
frame_speed = frame_average_size / frame_average_period ;
else
frame_speed = 70;
ImageOffset = hFile->fptr;
while ( --timeout > 0 )
{
f_lseek(hFile, ImageOffset - VIDEO_BUFFER_SIZE);
f_read(hFile, (char *)_acVideoBuffer, VIDEO_BUFFER_SIZE, &NumBytesRead);
/* Get image offset */
ptr = _acVideoBuffer;
while (NumBytesRead --)
{
if((*ptr == 0xFF) && ((*(ptr + 1)) == M_SOI))
{
ImageOffset -= (NumBytesRead + 1) ;
GUI_JPEG_GetInfoEx (_GetData, hFile, &video_info);
if((video_info.XSize != 320) || (video_info.YSize != 240))
{
return -1;
}
else
{
return 0;
}
}
ptr++;
}
ImageOffset += 2 * VIDEO_BUFFER_SIZE;
if (ImageOffset >= hFile->fsize)
{
return -1;
}
}
return -1;
}
