function getBMPHeaderFilepointer(&$fd, &$ThisFileInfo, $ExtractPalette = false, $ExtractData = false)
{
$ThisFileInfo['fileformat'] = 'bmp';
$ThisFileInfo['video']['dataformat'] = 'bmp';
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$offset = 0;
$BMPheader = fread($fd, 14 + 40);
// check if the hardcoded-to-1 "planes" is at offset 22 or 26
$planes22 = LittleEndian2Int(substr($BMPheader, 22, 2));
$planes26 = LittleEndian2Int(substr($BMPheader, 26, 2));
if ($planes22 == 1 && $planes26 != 1) {
$ThisFileInfo['bmp']['type_os'] = 'OS/2';
$ThisFileInfo['bmp']['type_version'] = 1;
} elseif ($planes26 == 1 && $planes22 != 1) {
$ThisFileInfo['bmp']['type_os'] = 'Windows';
$ThisFileInfo['bmp']['type_version'] = 1;
} elseif ($ThisFileInfo['bmp']['header']['raw']['header_size'] == 12) {
$ThisFileInfo['bmp']['type_os'] = 'OS/2';
$ThisFileInfo['bmp']['type_version'] = 1;
} elseif ($ThisFileInfo['bmp']['header']['raw']['header_size'] == 40) {
$ThisFileInfo['bmp']['type_os'] = 'Windows';
$ThisFileInfo['bmp']['type_version'] = 1;
} elseif ($ThisFileInfo['bmp']['header']['raw']['header_size'] == 84) {
$ThisFileInfo['bmp']['type_os'] = 'Windows';
$ThisFileInfo['bmp']['type_version'] = 4;
} elseif ($ThisFileInfo['bmp']['header']['raw']['header_size'] == 100) {
$ThisFileInfo['bmp']['type_os'] = 'Windows';
$ThisFileInfo['bmp']['type_version'] = 5;
}
// BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
// all versions
// WORD bfType;
// DWORD bfSize;
// WORD bfReserved1;
// WORD bfReserved2;
// DWORD bfOffBits;
$ThisFileInfo['bmp']['header']['raw']['identifier'] = substr($BMPheader, $offset, 2);
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['filesize'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['reserved1'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['reserved2'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['data_offset'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
if ($ThisFileInfo['bmp']['type_os'] == 'OS/2') {
// OS/2-format BMP
// http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
// DWORD Size; /* Size of this structure in bytes */
// DWORD Width; /* Bitmap width in pixels */
// DWORD Height; /* Bitmap height in pixel */
// WORD NumPlanes; /* Number of bit planes (color depth) */
// WORD BitsPerPixel; /* Number of bits per pixel per plane */
$ThisFileInfo['bmp']['header']['raw']['header_size'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['width'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['height'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['planes'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['video']['resolution_x'] = $ThisFileInfo['bmp']['header']['raw']['width'];
$ThisFileInfo['video']['resolution_y'] = $ThisFileInfo['bmp']['header']['raw']['height'];
$ThisFileInfo['video']['codec'] = 'BI_RGB ' . $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] . '-bit';
if ($ThisFileInfo['bmp']['type_version'] >= 2) {
// DWORD Compression; /* Bitmap compression scheme */
// DWORD ImageDataSize; /* Size of bitmap data in bytes */
// DWORD XResolution; /* X resolution of display device */
// DWORD YResolution; /* Y resolution of display device */
// DWORD ColorsUsed; /* Number of color table indices used */
// DWORD ColorsImportant; /* Number of important color indices */
// WORD Units; /* Type of units used to measure resolution */
// WORD Reserved; /* Pad structure to 4-byte boundary */
// WORD Recording; /* Recording algorithm */
// WORD Rendering; /* Halftoning algorithm used */
// DWORD Size1; /* Reserved for halftoning algorithm use */
// DWORD Size2; /* Reserved for halftoning algorithm use */
// DWORD ColorEncoding; /* Color model used in bitmap */
// DWORD Identifier; /* Reserved for application use */
$ThisFileInfo['bmp']['header']['raw']['compression'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['bmp_data_size'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['resolution_h'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['resolution_v'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['colors_used'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['colors_important'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['resolution_units'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['reserved1'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['recording'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['rendering'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['size1'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['size2'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['color_encoding'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['identifier'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['compression'] = BMPcompressionOS2Lookup($ThisFileInfo['bmp']['header']['raw']['compression']);
$ThisFileInfo['video']['codec'] = $ThisFileInfo['bmp']['header']['compression'] . ' ' . $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] . '-bit';
}
} elseif ($ThisFileInfo['bmp']['type_os'] == 'Windows') {
// Windows-format BMP
// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
// all versions
// DWORD biSize;
// LONG biWidth;
// LONG biHeight;
// WORD biPlanes;
// WORD biBitCount;
// DWORD biCompression;
// DWORD biSizeImage;
// LONG biXPelsPerMeter;
// LONG biYPelsPerMeter;
// DWORD biClrUsed;
// DWORD biClrImportant;
$ThisFileInfo['bmp']['header']['raw']['header_size'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['width'] = LittleEndian2Int(substr($BMPheader, $offset, 4), true);
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['height'] = LittleEndian2Int(substr($BMPheader, $offset, 4), true);
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['planes'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] = LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['bmp']['header']['raw']['compression'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['bmp_data_size'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['resolution_h'] = LittleEndian2Int(substr($BMPheader, $offset, 4), true);
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['resolution_v'] = LittleEndian2Int(substr($BMPheader, $offset, 4), true);
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['colors_used'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['colors_important'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['compression'] = BMPcompressionWindowsLookup($ThisFileInfo['bmp']['header']['raw']['compression']);
$ThisFileInfo['video']['resolution_x'] = $ThisFileInfo['bmp']['header']['raw']['width'];
$ThisFileInfo['video']['resolution_y'] = $ThisFileInfo['bmp']['header']['raw']['height'];
$ThisFileInfo['video']['codec'] = $ThisFileInfo['bmp']['header']['compression'] . ' ' . $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] . '-bit';
if ($ThisFileInfo['bmp']['type_version'] >= 4) {
$BMPheader .= fread($fd, 44);
// BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
// Win95+, WinNT4.0+
// DWORD bV4RedMask;
// DWORD bV4GreenMask;
// DWORD bV4BlueMask;
// DWORD bV4AlphaMask;
// DWORD bV4CSType;
// CIEXYZTRIPLE bV4Endpoints;
// DWORD bV4GammaRed;
// DWORD bV4GammaGreen;
// DWORD bV4GammaBlue;
$ThisFileInfo['bmp']['header']['raw']['red_mask'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['green_mask'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['blue_mask'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['alpha_mask'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['cs_type'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['ciexyz_red'] = substr($BMPheader, $offset, 4);
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['ciexyz_green'] = substr($BMPheader, $offset, 4);
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['ciexyz_blue'] = substr($BMPheader, $offset, 4);
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['gamma_red'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['gamma_green'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['gamma_blue'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['ciexyz_red'] = FixedPoint2_30(strrev($ThisFileInfo['bmp']['header']['raw']['ciexyz_red']));
$ThisFileInfo['bmp']['header']['ciexyz_green'] = FixedPoint2_30(strrev($ThisFileInfo['bmp']['header']['raw']['ciexyz_green']));
$ThisFileInfo['bmp']['header']['ciexyz_blue'] = FixedPoint2_30(strrev($ThisFileInfo['bmp']['header']['raw']['ciexyz_blue']));
}
if ($ThisFileInfo['bmp']['type_version'] >= 5) {
$BMPheader .= fread($fd, 16);
// BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
// Win98+, Win2000+
// DWORD bV5Intent;
// DWORD bV5ProfileData;
// DWORD bV5ProfileSize;
// DWORD bV5Reserved;
$ThisFileInfo['bmp']['header']['raw']['intent'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['profile_data_offset'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['profile_data_size'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$ThisFileInfo['bmp']['header']['raw']['reserved3'] = LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
}
} else {
$ThisFileInfo['error'] .= "\n" . 'Unknown BMP format in header.';
return false;
}
if ($ExtractPalette || $ExtractData) {
$PaletteEntries = 0;
if ($ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] < 16) {
$PaletteEntries = pow(2, $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel']);
} elseif (isset($ThisFileInfo['bmp']['header']['raw']['colors_used']) && $ThisFileInfo['bmp']['header']['raw']['colors_used'] > 0 && $ThisFileInfo['bmp']['header']['raw']['colors_used'] <= 256) {
$PaletteEntries = $ThisFileInfo['bmp']['header']['raw']['colors_used'];
}
if ($PaletteEntries > 0) {
$BMPpalette = fread($fd, 4 * $PaletteEntries);
$paletteoffset = 0;
for ($i = 0; $i < $PaletteEntries; $i++) {
// RGBQUAD - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_5f8y.asp
// BYTE rgbBlue;
// BYTE rgbGreen;
// BYTE rgbRed;
// BYTE rgbReserved;
//$ThisFileInfo['bmp']['palette']['blue'][$i] = LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
//$ThisFileInfo['bmp']['palette']['green'][$i] = LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
//$ThisFileInfo['bmp']['palette']['red'][$i] = LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
$blue = LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
$green = LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
$red = LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
if ($ThisFileInfo['bmp']['type_os'] == 'OS/2' && $ThisFileInfo['bmp']['type_version'] == 1) {
// no padding byte
} else {
$paletteoffset++;
// padding byte
}
$ThisFileInfo['bmp']['palette'][$i] = $red << 16 | $green << 8 | $blue;
}
}
}
if ($ExtractData) {
fseek($fd, $ThisFileInfo['bmp']['header']['raw']['data_offset'], SEEK_SET);
$RowByteLength = ceil($ThisFileInfo['bmp']['header']['raw']['width'] * ($ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] / 8) / 4) * 4;
// round up to nearest DWORD boundry
$BMPpixelData = fread($fd, $ThisFileInfo['bmp']['header']['raw']['height'] * $RowByteLength);
$pixeldataoffset = 0;
switch ($ThisFileInfo['bmp']['header']['raw']['compression']) {
case 0:
// BI_RGB
switch ($ThisFileInfo['bmp']['header']['raw']['bits_per_pixel']) {
case 1:
for ($row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1; $row >= 0; $row--) {
for ($col = 0; $col < $ThisFileInfo['bmp']['header']['raw']['width']; $col = $col) {
$paletteindexbyte = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
for ($i = 7; $i >= 0; $i--) {
$paletteindex = ($paletteindexbyte & 0x1 << $i) >> $i;
$ThisFileInfo['bmp']['data'][$row][$col] = $ThisFileInfo['bmp']['palette'][$paletteindex];
$col++;
}
}
while ($pixeldataoffset % 4 != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 4:
for ($row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1; $row >= 0; $row--) {
for ($col = 0; $col < $ThisFileInfo['bmp']['header']['raw']['width']; $col = $col) {
$paletteindexbyte = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
for ($i = 1; $i >= 0; $i--) {
$paletteindex = ($paletteindexbyte & 0xf << 4 * $i) >> 4 * $i;
$ThisFileInfo['bmp']['data'][$row][$col] = $ThisFileInfo['bmp']['palette'][$paletteindex];
$col++;
}
}
while ($pixeldataoffset % 4 != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 8:
for ($row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1; $row >= 0; $row--) {
for ($col = 0; $col < $ThisFileInfo['bmp']['header']['raw']['width']; $col++) {
$paletteindex = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$ThisFileInfo['bmp']['data'][$row][$col] = $ThisFileInfo['bmp']['palette'][$paletteindex];
}
while ($pixeldataoffset % 4 != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 24:
case 32:
for ($row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1; $row >= 0; $row--) {
for ($col = 0; $col < $ThisFileInfo['bmp']['header']['raw']['width']; $col++) {
$blue = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$green = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$red = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
if ($ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] == 32) {
$paletteoffset++;
// filler byte
}
$ThisFileInfo['bmp']['data'][$row][$col] = $red << 16 | $green << 8 | $blue;
}
while ($pixeldataoffset % 4 != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 16:
default:
$ThisFileInfo['error'] .= "\n" . 'Unknown bits-per-pixel value (' . $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] . ') - cannot read pixel data';
break;
}
break;
case 1:
// BI_RLE8 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
switch ($ThisFileInfo['bmp']['header']['raw']['bits_per_pixel']) {
case 8:
$pixelcounter = 0;
while ($pixeldataoffset < strlen($BMPpixelData)) {
$firstbyte = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$secondbyte = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
if ($firstbyte == 0) {
// escaped/absolute mode - the first byte of the pair can be set to zero to
// indicate an escape character that denotes the end of a line, the end of
// a bitmap, or a delta, depending on the value of the second byte.
switch ($secondbyte) {
case 0:
// end of line
// no need for special processing, just ignore
break;
case 1:
// end of bitmap
$pixeldataoffset = strlen($BMPpixelData);
// force to exit loop just in case
break;
case 2:
// delta - The 2 bytes following the escape contain unsigned values
// indicating the horizontal and vertical offsets of the next pixel
// from the current position.
$colincrement = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$rowincrement = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$col = $pixelcounter % $ThisFileInfo['bmp']['header']['raw']['width'] + $colincrement;
$row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1 - ($pixelcounter - $col) / $ThisFileInfo['bmp']['header']['raw']['width'] - $rowincrement;
$pixelcounter = $row * $ThisFileInfo['bmp']['header']['raw']['width'] + $col;
break;
default:
// In absolute mode, the first byte is zero and the second byte is a
// value in the range 03H through FFH. The second byte represents the
// number of bytes that follow, each of which contains the color index
// of a single pixel. Each run must be aligned on a word boundary.
for ($i = 0; $i < $secondbyte; $i++) {
$paletteindex = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$col = $pixelcounter % $ThisFileInfo['bmp']['header']['raw']['width'];
$row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1 - ($pixelcounter - $col) / $ThisFileInfo['bmp']['header']['raw']['width'];
$ThisFileInfo['bmp']['data'][$row][$col] = $ThisFileInfo['bmp']['palette'][$paletteindex];
$pixelcounter++;
}
while ($pixeldataoffset % 2 != 0) {
// Each run must be aligned on a word boundary.
$pixeldataoffset++;
}
break;
}
} else {
// encoded mode - the first byte specifies the number of consecutive pixels
// to be drawn using the color index contained in the second byte.
for ($i = 0; $i < $firstbyte; $i++) {
$col = $pixelcounter % $ThisFileInfo['bmp']['header']['raw']['width'];
$row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1 - ($pixelcounter - $col) / $ThisFileInfo['bmp']['header']['raw']['width'];
$ThisFileInfo['bmp']['data'][$row][$col] = $ThisFileInfo['bmp']['palette'][$secondbyte];
$pixelcounter++;
}
}
}
break;
default:
$ThisFileInfo['error'] .= "\n" . 'Unknown bits-per-pixel value (' . $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] . ') - cannot read pixel data';
break;
}
break;
case 2:
// BI_RLE4 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
switch ($ThisFileInfo['bmp']['header']['raw']['bits_per_pixel']) {
case 4:
$pixelcounter = 0;
while ($pixeldataoffset < strlen($BMPpixelData)) {
$firstbyte = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$secondbyte = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
if ($firstbyte == 0) {
// escaped/absolute mode - the first byte of the pair can be set to zero to
// indicate an escape character that denotes the end of a line, the end of
// a bitmap, or a delta, depending on the value of the second byte.
switch ($secondbyte) {
case 0:
// end of line
// no need for special processing, just ignore
break;
case 1:
// end of bitmap
$pixeldataoffset = strlen($BMPpixelData);
// force to exit loop just in case
break;
case 2:
// delta - The 2 bytes following the escape contain unsigned values
// indicating the horizontal and vertical offsets of the next pixel
// from the current position.
$colincrement = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$rowincrement = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$col = $pixelcounter % $ThisFileInfo['bmp']['header']['raw']['width'] + $colincrement;
$row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1 - ($pixelcounter - $col) / $ThisFileInfo['bmp']['header']['raw']['width'] - $rowincrement;
$pixelcounter = $row * $ThisFileInfo['bmp']['header']['raw']['width'] + $col;
break;
default:
// In absolute mode, the first byte is zero. The second byte contains the number
// of color indexes that follow. Subsequent bytes contain color indexes in their
// high- and low-order 4 bits, one color index for each pixel. In absolute mode,
// each run must be aligned on a word boundary.
unset($paletteindexes);
for ($i = 0; $i < ceil($secondbyte / 2); $i++) {
$paletteindexbyte = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
$paletteindexes[] = ($paletteindexbyte & 0xf0) >> 4;
$paletteindexes[] = $paletteindexbyte & 0xf;
}
while ($pixeldataoffset % 2 != 0) {
// Each run must be aligned on a word boundary.
$pixeldataoffset++;
}
foreach ($paletteindexes as $paletteindex) {
$col = $pixelcounter % $ThisFileInfo['bmp']['header']['raw']['width'];
$row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1 - ($pixelcounter - $col) / $ThisFileInfo['bmp']['header']['raw']['width'];
$ThisFileInfo['bmp']['data'][$row][$col] = $ThisFileInfo['bmp']['palette'][$paletteindex];
$pixelcounter++;
}
break;
}
} else {
// encoded mode - the first byte of the pair contains the number of pixels to be
// drawn using the color indexes in the second byte. The second byte contains two
// color indexes, one in its high-order 4 bits and one in its low-order 4 bits.
// The first of the pixels is drawn using the color specified by the high-order
// 4 bits, the second is drawn using the color in the low-order 4 bits, the third
// is drawn using the color in the high-order 4 bits, and so on, until all the
// pixels specified by the first byte have been drawn.
$paletteindexes[0] = ($secondbyte & 0xf0) >> 4;
$paletteindexes[1] = $secondbyte & 0xf;
for ($i = 0; $i < $firstbyte; $i++) {
$col = $pixelcounter % $ThisFileInfo['bmp']['header']['raw']['width'];
$row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1 - ($pixelcounter - $col) / $ThisFileInfo['bmp']['header']['raw']['width'];
$ThisFileInfo['bmp']['data'][$row][$col] = $ThisFileInfo['bmp']['palette'][$paletteindexes[$i % 2]];
$pixelcounter++;
}
}
}
break;
default:
$ThisFileInfo['error'] .= "\n" . 'Unknown bits-per-pixel value (' . $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] . ') - cannot read pixel data';
break;
}
break;
case 3:
// BI_BITFIELDS
switch ($ThisFileInfo['bmp']['header']['raw']['bits_per_pixel']) {
case 16:
case 32:
$redshift = 0;
$greenshift = 0;
$blueshift = 0;
while (($ThisFileInfo['bmp']['header']['raw']['red_mask'] >> $redshift & 0x1) == 0) {
$redshift++;
}
while (($ThisFileInfo['bmp']['header']['raw']['green_mask'] >> $greenshift & 0x1) == 0) {
$greenshift++;
}
while (($ThisFileInfo['bmp']['header']['raw']['blue_mask'] >> $blueshift & 0x1) == 0) {
$blueshift++;
}
for ($row = $ThisFileInfo['bmp']['header']['raw']['height'] - 1; $row >= 0; $row--) {
for ($col = 0; $col < $ThisFileInfo['bmp']['header']['raw']['width']; $col++) {
$pixelvalue = LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset, $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] / 8));
$pixeldataoffset += $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] / 8;
$red = round((($pixelvalue & $ThisFileInfo['bmp']['header']['raw']['red_mask']) >> $redshift) / ($ThisFileInfo['bmp']['header']['raw']['red_mask'] >> $redshift) * 255);
$green = round((($pixelvalue & $ThisFileInfo['bmp']['header']['raw']['green_mask']) >> $greenshift) / ($ThisFileInfo['bmp']['header']['raw']['green_mask'] >> $greenshift) * 255);
$blue = round((($pixelvalue & $ThisFileInfo['bmp']['header']['raw']['blue_mask']) >> $blueshift) / ($ThisFileInfo['bmp']['header']['raw']['blue_mask'] >> $blueshift) * 255);
$ThisFileInfo['bmp']['data'][$row][$col] = $red << 16 | $green << 8 | $blue;
}
while ($pixeldataoffset % 4 != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
default:
$ThisFileInfo['error'] .= "\n" . 'Unknown bits-per-pixel value (' . $ThisFileInfo['bmp']['header']['raw']['bits_per_pixel'] . ') - cannot read pixel data';
break;
}
break;
default:
// unhandled compression type
$ThisFileInfo['error'] .= "\n" . 'Unknown/unhandled compression type value (' . $ThisFileInfo['bmp']['header']['raw']['compression'] . ') - cannot decompress pixel data';
break;
}
}
return true;
}
function QuicktimeParseAtom($atomname, $atomsize, $atomdata, &$ThisFileInfo, $baseoffset, &$atomHierarchy)
{
// http://developer.apple.com/techpubs/quicktime/qtdevdocs/APIREF/INDEX/atomalphaindex.htm
array_push($atomHierarchy, $atomname);
$atomstructure['hierarchy'] = implode(' ', $atomHierarchy);
$atomstructure['name'] = $atomname;
$atomstructure['size'] = $atomsize;
$atomstructure['offset'] = $baseoffset;
switch ($atomname) {
case 'moov':
// MOVie container atom
// MOVie container atom
case 'trak':
// TRAcK container atom
// TRAcK container atom
case 'clip':
// CLIPping container atom
// CLIPping container atom
case 'matt':
// track MATTe container atom
// track MATTe container atom
case 'edts':
// EDiTS container atom
// EDiTS container atom
case 'tref':
// Track REFerence container atom
// Track REFerence container atom
case 'mdia':
// MeDIA container atom
// MeDIA container atom
case 'minf':
// Media INFormation container atom
// Media INFormation container atom
case 'dinf':
// Data INFormation container atom
// Data INFormation container atom
case 'udta':
// User DaTA container atom
// User DaTA container atom
case 'stbl':
// Sample TaBLe container atom
// Sample TaBLe container atom
case 'cmov':
// Compressed MOVie container atom
// Compressed MOVie container atom
case 'rmra':
// Reference Movie Record Atom
// Reference Movie Record Atom
case 'rmda':
// Reference Movie Descriptor Atom
$atomstructure['subatoms'] = QuicktimeParseContainerAtom($atomdata, $ThisFileInfo, $baseoffset + 8, $atomHierarchy);
break;
case '©cpy':
case '©day':
case '©dir':
case '©ed1':
case '©ed2':
case '©ed3':
case '©ed4':
case '©ed5':
case '©ed6':
case '©ed7':
case '©ed8':
case '©ed9':
case '©fmt':
case '©inf':
case '©prd':
case '©prf':
case '©req':
case '©src':
case '©wrt':
case '©nam':
case '©cmt':
case '©wrn':
case '©hst':
case '©mak':
case '©mod':
case '©PRD':
case '©swr':
case '©aut':
case '©ART':
case '©trk':
case '©alb':
case '©com':
case '©gen':
case '©ope':
case '©url':
case '©enc':
$atomstructure['data_length'] = BigEndian2Int(substr($atomdata, 0, 2));
$atomstructure['language_id'] = BigEndian2Int(substr($atomdata, 2, 2));
$atomstructure['data'] = substr($atomdata, 4);
$atomstructure['language'] = QuicktimeLanguageLookup($atomstructure['language_id']);
$handyatomtranslatorarray['©cpy'] = 'copyright';
$handyatomtranslatorarray['©day'] = 'creation_date';
$handyatomtranslatorarray['©dir'] = 'director';
$handyatomtranslatorarray['©ed1'] = 'edit1';
$handyatomtranslatorarray['©ed2'] = 'edit2';
$handyatomtranslatorarray['©ed3'] = 'edit3';
$handyatomtranslatorarray['©ed4'] = 'edit4';
$handyatomtranslatorarray['©ed5'] = 'edit5';
$handyatomtranslatorarray['©ed6'] = 'edit6';
$handyatomtranslatorarray['©ed7'] = 'edit7';
$handyatomtranslatorarray['©ed8'] = 'edit8';
$handyatomtranslatorarray['©ed9'] = 'edit9';
$handyatomtranslatorarray['©fmt'] = 'format';
$handyatomtranslatorarray['©inf'] = 'information';
$handyatomtranslatorarray['©prd'] = 'producer';
$handyatomtranslatorarray['©prf'] = 'performers';
$handyatomtranslatorarray['©req'] = 'system_requirements';
$handyatomtranslatorarray['©src'] = 'source_credit';
$handyatomtranslatorarray['©wrt'] = 'writer';
// http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
$handyatomtranslatorarray['©nam'] = 'title';
$handyatomtranslatorarray['©cmt'] = 'comment';
$handyatomtranslatorarray['©wrn'] = 'warning';
$handyatomtranslatorarray['©hst'] = 'host_computer';
$handyatomtranslatorarray['©mak'] = 'make';
$handyatomtranslatorarray['©mod'] = 'model';
$handyatomtranslatorarray['©PRD'] = 'product';
$handyatomtranslatorarray['©swr'] = 'software';
$handyatomtranslatorarray['©aut'] = 'author';
$handyatomtranslatorarray['©ART'] = 'artist';
$handyatomtranslatorarray['©trk'] = 'track';
$handyatomtranslatorarray['©alb'] = 'album';
$handyatomtranslatorarray['©com'] = 'comment';
$handyatomtranslatorarray['©gen'] = 'genre';
$handyatomtranslatorarray['©ope'] = 'composer';
$handyatomtranslatorarray['©url'] = 'url';
$handyatomtranslatorarray['©enc'] = 'encoder';
if (isset($handyatomtranslatorarray["{$atomname}"])) {
$ThisFileInfo['quicktime']['comments'][$handyatomtranslatorarray["{$atomname}"]][] = $atomstructure['data'];
}
break;
case 'play':
// auto-PLAY atom
$atomstructure['autoplay'] = (bool) BigEndian2Int(substr($atomdata, 0, 1));
$ThisFileInfo['quicktime']['autoplay'] = $atomstructure['autoplay'];
break;
case 'WLOC':
// Window LOCation atom
$atomstructure['location_x'] = BigEndian2Int(substr($atomdata, 0, 2));
$atomstructure['location_y'] = BigEndian2Int(substr($atomdata, 2, 2));
break;
case 'LOOP':
// LOOPing atom
// LOOPing atom
case 'SelO':
// play SELection Only atom
// play SELection Only atom
case 'AllF':
// play ALL Frames atom
$atomstructure['data'] = BigEndian2Int($atomdata);
break;
case 'name':
//
//
case 'MCPS':
// Media Cleaner PRo
// Media Cleaner PRo
case '@PRM':
// adobe PReMiere version
// adobe PReMiere version
case '@PRQ':
// adobe PRemiere Quicktime version
$atomstructure['data'] = $atomdata;
break;
case 'cmvd':
// Compressed MooV Data atom
$ThisFileInfo['warning'] .= "\n" . 'Compressed Quicktime MOOV Data atoms ("cmvd") not supported';
break;
case 'dcom':
// Data COMpression atom
$atomstructure['compression_id'] = $atomdata;
$atomstructure['compression_text'] = QuicktimeDCOMLookup($atomdata);
break;
case 'rdrf':
// Reference movie Data ReFerence atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['flags']['internal_data'] = (bool) ($atomstructure['flags_raw'] & 0x1);
$atomstructure['reference_type_name'] = substr($atomdata, 4, 4);
$atomstructure['reference_length'] = BigEndian2Int(substr($atomdata, 8, 4));
switch ($atomstructure['reference_type_name']) {
case 'url ':
$atomstructure['url'] = NoNullString(substr($atomdata, 12));
break;
case 'alis':
$atomstructure['file_alias'] = substr($atomdata, 12);
break;
case 'rsrc':
$atomstructure['resource_alias'] = substr($atomdata, 12);
break;
default:
$atomstructure['data'] = substr($atomdata, 12);
break;
}
break;
case 'rmqu':
// Reference Movie QUality atom
$atomstructure['movie_quality'] = BigEndian2Int($atomdata);
break;
case 'rmcs':
// Reference Movie Cpu Speed atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['cpu_speed_rating'] = BigEndian2Int(substr($atomdata, 4, 2));
break;
case 'rmvc':
// Reference Movie Version Check atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['gestalt_selector'] = substr($atomdata, 4, 4);
$atomstructure['gestalt_value_mask'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['gestalt_value'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['gestalt_check_type'] = BigEndian2Int(substr($atomdata, 14, 2));
break;
case 'rmcd':
// Reference Movie Component check atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['component_type'] = substr($atomdata, 4, 4);
$atomstructure['component_subtype'] = substr($atomdata, 8, 4);
$atomstructure['component_manufacturer'] = substr($atomdata, 12, 4);
$atomstructure['component_flags_raw'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['component_flags_mask'] = BigEndian2Int(substr($atomdata, 20, 4));
$atomstructure['component_min_version'] = BigEndian2Int(substr($atomdata, 24, 4));
break;
case 'rmdr':
// Reference Movie Data Rate atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['data_rate'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['data_rate_bps'] = $atomstructure['data_rate'] * 10;
break;
case 'rmla':
// Reference Movie Language Atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['language_id'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['language'] = QuicktimeLanguageLookup($atomstructure['language_id']);
break;
case 'rmla':
// Reference Movie Language Atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['track_id'] = BigEndian2Int(substr($atomdata, 4, 2));
break;
case 'stsd':
// Sample Table Sample Description atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stsdEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['sample_description_table'][$i]['size'] = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 4));
$stsdEntriesDataOffset += 4;
$atomstructure['sample_description_table'][$i]['data_format'] = substr($atomdata, $stsdEntriesDataOffset, 4);
$stsdEntriesDataOffset += 4;
$atomstructure['sample_description_table'][$i]['reserved'] = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 6));
$stsdEntriesDataOffset += 6;
$atomstructure['sample_description_table'][$i]['reference_index'] = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 2));
$stsdEntriesDataOffset += 2;
$atomstructure['sample_description_table'][$i]['data'] = substr($atomdata, $stsdEntriesDataOffset, $atomstructure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2);
$stsdEntriesDataOffset += $atomstructure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2;
$atomstructure['sample_description_table'][$i]['encoder_version'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 0, 2));
$atomstructure['sample_description_table'][$i]['encoder_revision'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 2, 2));
$atomstructure['sample_description_table'][$i]['encoder_vendor'] = substr($atomstructure['sample_description_table'][$i]['data'], 4, 4);
if ($atomstructure['sample_description_table'][$i]['encoder_vendor'] == chr(0) . chr(0) . chr(0) . chr(0)) {
// audio atom
$atomstructure['sample_description_table'][$i]['audio_channels'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 8, 2));
$atomstructure['sample_description_table'][$i]['audio_bit_depth'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 10, 2));
$atomstructure['sample_description_table'][$i]['audio_compression_id'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12, 2));
$atomstructure['sample_description_table'][$i]['audio_packet_size'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 14, 2));
$atomstructure['sample_description_table'][$i]['audio_sample_rate'] = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 16, 4));
$ThisFileInfo['quicktime']['audio']['codec'] = QuicktimeAudioCodecLookup($atomstructure['sample_description_table'][$i]['data_format']);
$ThisFileInfo['quicktime']['audio']['sample_rate'] = $atomstructure['sample_description_table'][$i]['audio_sample_rate'];
$ThisFileInfo['quicktime']['audio']['channels'] = $atomstructure['sample_description_table'][$i]['audio_channels'];
$ThisFileInfo['quicktime']['audio']['bit_depth'] = $atomstructure['sample_description_table'][$i]['audio_bit_depth'];
$ThisFileInfo['audio']['codec'] = $ThisFileInfo['quicktime']['audio']['codec'];
$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['quicktime']['audio']['sample_rate'];
$ThisFileInfo['audio']['channels'] = $ThisFileInfo['quicktime']['audio']['channels'];
$ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['quicktime']['audio']['bit_depth'];
} else {
// video atom
$atomstructure['sample_description_table'][$i]['video_temporal_quality'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 8, 4));
$atomstructure['sample_description_table'][$i]['video_spatial_quality'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12, 4));
$atomstructure['sample_description_table'][$i]['video_frame_width'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 16, 2));
$atomstructure['sample_description_table'][$i]['video_frame_height'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 18, 2));
$atomstructure['sample_description_table'][$i]['video_resolution_x'] = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 20, 4));
$atomstructure['sample_description_table'][$i]['video_resolution_y'] = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 24, 4));
$atomstructure['sample_description_table'][$i]['video_data_size'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 28, 4));
$atomstructure['sample_description_table'][$i]['video_frame_count'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 32, 2));
$atomstructure['sample_description_table'][$i]['video_encoder_name_len'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 34, 1));
$atomstructure['sample_description_table'][$i]['video_encoder_name'] = substr($atomstructure['sample_description_table'][$i]['data'], 35, $atomstructure['sample_description_table'][$i]['video_encoder_name_len']);
$atomstructure['sample_description_table'][$i]['video_pixel_color_depth'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 66, 2));
$atomstructure['sample_description_table'][$i]['video_color_table_id'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 68, 2));
$atomstructure['sample_description_table'][$i]['video_pixel_color_type'] = $atomstructure['sample_description_table'][$i]['video_pixel_color_depth'] > 32 ? 'grayscale' : 'color';
$atomstructure['sample_description_table'][$i]['video_pixel_color_name'] = QuicktimeColorNameLookup($atomstructure['sample_description_table'][$i]['video_pixel_color_depth']);
if ($atomstructure['sample_description_table'][$i]['video_pixel_color_name'] != 'invalid') {
//$ThisFileInfo['quicktime']['video']['codec'] = QuicktimeVideoCodecLookup($atomstructure['sample_description_table'][$i]['data_format']);
$ThisFileInfo['quicktime']['video']['codec'] = $atomstructure['sample_description_table'][$i]['video_encoder_name'];
$ThisFileInfo['quicktime']['video']['color_depth'] = $atomstructure['sample_description_table'][$i]['video_pixel_color_depth'];
$ThisFileInfo['quicktime']['video']['color_depth_name'] = $atomstructure['sample_description_table'][$i]['video_pixel_color_name'];
$ThisFileInfo['video']['codec'] = $ThisFileInfo['quicktime']['video']['codec'];
}
}
switch ($atomstructure['sample_description_table'][$i]['data_format']) {
case 'mp4a':
$ThisFileInfo['fileformat'] = 'mp4';
$ThisFileInfo['mime_type'] = 'audio/mp4';
unset($ThisFileInfo['video']['dataformat']);
break;
default:
// do nothing
break;
}
unset($atomstructure['sample_description_table'][$i]['data']);
}
break;
case 'stts':
// Sample Table Time-to-Sample atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$sttsEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['time_to_sample_table'][$i]['sample_count'] = BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
$sttsEntriesDataOffset += 4;
$atomstructure['time_to_sample_table'][$i]['sample_duration'] = BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
$sttsEntriesDataOffset += 4;
}
break;
case 'stss':
// Sample Table Sync Sample (key frames) atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stssEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['time_to_sample_table'][$i] = BigEndian2Int(substr($atomdata, $stssEntriesDataOffset, 4));
$stssEntriesDataOffset += 4;
}
break;
case 'stsc':
// Sample Table Sample-to-Chunk atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stscEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['sample_to_chunk_table'][$i]['first_chunk'] = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
$stscEntriesDataOffset += 4;
$atomstructure['sample_to_chunk_table'][$i]['samples_per_chunk'] = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
$stscEntriesDataOffset += 4;
$atomstructure['sample_to_chunk_table'][$i]['sample_description'] = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
$stscEntriesDataOffset += 4;
}
break;
case 'stsz':
// Sample Table SiZe atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['sample_size'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 8, 4));
$stszEntriesDataOffset = 12;
if ($atomstructure['sample_size'] == 0) {
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['sample_size_table'][$i] = BigEndian2Int(substr($atomdata, $stszEntriesDataOffset, 4));
$stszEntriesDataOffset += 4;
}
}
break;
case 'stco':
// Sample Table Chunk Offset atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stcoEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['chunk_offset_table'][$i] = BigEndian2Int(substr($atomdata, $stcoEntriesDataOffset, 4));
$stcoEntriesDataOffset += 4;
}
break;
case 'dref':
// Data REFerence atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$drefDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['data_references'][$i]['size'] = BigEndian2Int(substr($atomdata, $drefDataOffset, 4));
$drefDataOffset += 4;
$atomstructure['data_references'][$i]['type'] = substr($atomdata, $drefDataOffset, 4);
$drefDataOffset += 4;
$atomstructure['data_references'][$i]['version'] = BigEndian2Int(substr($atomdata, $drefDataOffset, 1));
$drefDataOffset += 1;
$atomstructure['data_references'][$i]['flags_raw'] = BigEndian2Int(substr($atomdata, $drefDataOffset, 3));
// hardcoded: 0x000
$drefDataOffset += 3;
$atomstructure['data_references'][$i]['data'] = substr($atomdata, $drefDataOffset, $atomstructure['data_references'][$i]['size'] - 4 - 4 - 1 - 3);
$drefDataOffset += $atomstructure['data_references'][$i]['size'] - 4 - 4 - 1 - 3;
$atomstructure['data_references'][$i]['flags']['self_reference'] = (bool) ($atomstructure['data_references'][$i]['flags_raw'] & 0x1);
}
break;
case 'gmin':
// base Media INformation atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['graphics_mode'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['opcolor_red'] = BigEndian2Int(substr($atomdata, 6, 2));
$atomstructure['opcolor_green'] = BigEndian2Int(substr($atomdata, 8, 2));
$atomstructure['opcolor_blue'] = BigEndian2Int(substr($atomdata, 10, 2));
$atomstructure['balance'] = BigEndian2Int(substr($atomdata, 12, 2));
$atomstructure['reserved'] = BigEndian2Int(substr($atomdata, 14, 2));
break;
case 'smhd':
// Sound Media information HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['balance'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['reserved'] = BigEndian2Int(substr($atomdata, 6, 2));
break;
case 'vmhd':
// Video Media information HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['graphics_mode'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['opcolor_red'] = BigEndian2Int(substr($atomdata, 6, 2));
$atomstructure['opcolor_green'] = BigEndian2Int(substr($atomdata, 8, 2));
$atomstructure['opcolor_blue'] = BigEndian2Int(substr($atomdata, 10, 2));
$atomstructure['flags']['no_lean_ahead'] = (bool) ($atomstructure['flags_raw'] & 0x1);
break;
case 'hdlr':
// HanDLeR reference atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['component_type'] = substr($atomdata, 4, 4);
$atomstructure['component_subtype'] = substr($atomdata, 8, 4);
$atomstructure['component_manufacturer'] = substr($atomdata, 12, 4);
$atomstructure['component_flags_raw'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['component_flags_mask'] = BigEndian2Int(substr($atomdata, 20, 4));
$atomstructure['component_name'] = Pascal2String(substr($atomdata, 24));
break;
case 'mdhd':
// MeDia HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['creation_time'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['modify_time'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['time_scale'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['duration'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['language_id'] = BigEndian2Int(substr($atomdata, 20, 2));
$atomstructure['quality'] = BigEndian2Int(substr($atomdata, 22, 2));
if ($atomstructure['time_scale'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt Quicktime file: mdhd.time_scale == zero';
return false;
}
$atomstructure['creation_time_unix'] = DateMac2Unix($atomstructure['creation_time']);
$atomstructure['modify_time_unix'] = DateMac2Unix($atomstructure['modify_time']);
$atomstructure['playtime_seconds'] = $atomstructure['duration'] / $atomstructure['time_scale'];
$atomstructure['language'] = QuicktimeLanguageLookup($atomstructure['language_id']);
break;
case 'pnot':
// Preview atom
$atomstructure['modification_date'] = BigEndian2Int(substr($atomdata, 0, 4));
// "standard Macintosh format"
$atomstructure['version_number'] = BigEndian2Int(substr($atomdata, 4, 2));
// hardcoded: 0x00
$atomstructure['atom_type'] = substr($atomdata, 6, 4);
// usually: 'PICT'
$atomstructure['atom_index'] = BigEndian2Int(substr($atomdata, 10, 2));
// usually: 0x01
$atomstructure['modification_date_unix'] = DateMac2Unix($atomstructure['modification_date']);
break;
case 'crgn':
// Clipping ReGioN atom
$atomstructure['region_size'] = BigEndian2Int(substr($atomdata, 0, 2));
// The Region size, Region boundary box,
$atomstructure['boundary_box'] = BigEndian2Int(substr($atomdata, 2, 8));
// and Clipping region data fields
$atomstructure['clipping_data'] = substr($atomdata, 10);
// constitute a QuickDraw region.
break;
case 'load':
// track LOAD settings atom
$atomstructure['preload_start_time'] = BigEndian2Int(substr($atomdata, 0, 4));
$atomstructure['preload_duration'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['preload_flags_raw'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['default_hints_raw'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['default_hints']['double_buffer'] = (bool) ($atomstructure['default_hints_raw'] & 0x20);
$atomstructure['default_hints']['high_quality'] = (bool) ($atomstructure['default_hints_raw'] & 0x100);
break;
case 'tmcd':
// TiMe CoDe atom
// TiMe CoDe atom
case 'chap':
// CHAPter list atom
// CHAPter list atom
case 'sync':
// SYNChronization atom
// SYNChronization atom
case 'scpt':
// tranSCriPT atom
// tranSCriPT atom
case 'ssrc':
// non-primary SouRCe atom
for ($i = 0; $i < strlen($atomdata) % 4; $i++) {
$atomstructure['track_id'][$i] = BigEndian2Int(substr($atomdata, $i * 4, 4));
}
break;
case 'elst':
// Edit LiST atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['edit_list'][$i]['track_duration'] = BigEndian2Int(substr($atomdata, 8 + $i * 12 + 0, 4));
$atomstructure['edit_list'][$i]['media_time'] = BigEndian2Int(substr($atomdata, 8 + $i * 12 + 4, 4));
$atomstructure['edit_list'][$i]['media_rate'] = BigEndian2Int(substr($atomdata, 8 + $i * 12 + 8, 4));
}
break;
case 'kmat':
// compressed MATte atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['matte_data_raw'] = substr($atomdata, 4);
break;
case 'ctab':
// Color TABle atom
$atomstructure['color_table_seed'] = BigEndian2Int(substr($atomdata, 0, 4));
// hardcoded: 0x00000000
$atomstructure['color_table_flags'] = BigEndian2Int(substr($atomdata, 4, 2));
// hardcoded: 0x8000
$atomstructure['color_table_size'] = BigEndian2Int(substr($atomdata, 6, 2)) + 1;
for ($colortableentry = 0; $colortableentry < $atomstructure['color_table_size']; $colortableentry++) {
$atomstructure['color_table'][$colortableentry]['alpha'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 0, 2));
$atomstructure['color_table'][$colortableentry]['red'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 2, 2));
$atomstructure['color_table'][$colortableentry]['green'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 4, 2));
$atomstructure['color_table'][$colortableentry]['blue'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 6, 2));
}
break;
case 'mvhd':
// MoVie HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['creation_time'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['modify_time'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['time_scale'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['duration'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['preferred_rate'] = FixedPoint16_16(substr($atomdata, 20, 4));
$atomstructure['preferred_volume'] = FixedPoint8_8(substr($atomdata, 24, 2));
$atomstructure['reserved'] = substr($atomdata, 26, 10);
$atomstructure['matrix_a'] = FixedPoint16_16(substr($atomdata, 36, 4));
$atomstructure['matrix_b'] = FixedPoint16_16(substr($atomdata, 40, 4));
$atomstructure['matrix_u'] = FixedPoint16_16(substr($atomdata, 44, 4));
$atomstructure['matrix_c'] = FixedPoint16_16(substr($atomdata, 48, 4));
$atomstructure['matrix_v'] = FixedPoint16_16(substr($atomdata, 52, 4));
$atomstructure['matrix_d'] = FixedPoint16_16(substr($atomdata, 56, 4));
$atomstructure['matrix_x'] = FixedPoint2_30(substr($atomdata, 60, 4));
$atomstructure['matrix_y'] = FixedPoint2_30(substr($atomdata, 64, 4));
$atomstructure['matrix_w'] = FixedPoint2_30(substr($atomdata, 68, 4));
$atomstructure['preview_time'] = BigEndian2Int(substr($atomdata, 72, 4));
$atomstructure['preview_duration'] = BigEndian2Int(substr($atomdata, 76, 4));
$atomstructure['poster_time'] = BigEndian2Int(substr($atomdata, 80, 4));
$atomstructure['selection_time'] = BigEndian2Int(substr($atomdata, 84, 4));
$atomstructure['selection_duration'] = BigEndian2Int(substr($atomdata, 88, 4));
$atomstructure['current_time'] = BigEndian2Int(substr($atomdata, 92, 4));
$atomstructure['next_track_id'] = BigEndian2Int(substr($atomdata, 96, 4));
if ($atomstructure['time_scale'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt Quicktime file: mvhd.time_scale == zero';
return false;
}
$atomstructure['creation_time_unix'] = DateMac2Unix($atomstructure['creation_time']);
$atomstructure['modify_time_unix'] = DateMac2Unix($atomstructure['modify_time']);
$ThisFileInfo['quicktime']['time_scale'] = $atomstructure['time_scale'];
$ThisFileInfo['playtime_seconds'] = $atomstructure['duration'] / $atomstructure['time_scale'];
break;
case 'tkhd':
// TracK HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['creation_time'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['modify_time'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['trackid'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['reserved1'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['duration'] = BigEndian2Int(substr($atomdata, 20, 4));
$atomstructure['reserved2'] = BigEndian2Int(substr($atomdata, 24, 8));
$atomstructure['layer'] = BigEndian2Int(substr($atomdata, 32, 2));
$atomstructure['alternate_group'] = BigEndian2Int(substr($atomdata, 34, 2));
$atomstructure['volume'] = FixedPoint8_8(substr($atomdata, 36, 2));
$atomstructure['reserved3'] = BigEndian2Int(substr($atomdata, 38, 2));
$atomstructure['matrix_a'] = FixedPoint16_16(substr($atomdata, 40, 4));
$atomstructure['matrix_b'] = FixedPoint16_16(substr($atomdata, 44, 4));
$atomstructure['matrix_u'] = FixedPoint16_16(substr($atomdata, 48, 4));
$atomstructure['matrix_c'] = FixedPoint16_16(substr($atomdata, 52, 4));
$atomstructure['matrix_v'] = FixedPoint16_16(substr($atomdata, 56, 4));
$atomstructure['matrix_d'] = FixedPoint16_16(substr($atomdata, 60, 4));
$atomstructure['matrix_x'] = FixedPoint2_30(substr($atomdata, 64, 4));
$atomstructure['matrix_y'] = FixedPoint2_30(substr($atomdata, 68, 4));
$atomstructure['matrix_w'] = FixedPoint2_30(substr($atomdata, 72, 4));
$atomstructure['width'] = FixedPoint16_16(substr($atomdata, 76, 4));
$atomstructure['height'] = FixedPoint16_16(substr($atomdata, 80, 4));
$atomstructure['flags']['enabled'] = (bool) ($atomstructure['flags_raw'] & 0x1);
$atomstructure['flags']['in_movie'] = (bool) ($atomstructure['flags_raw'] & 0x2);
$atomstructure['flags']['in_preview'] = (bool) ($atomstructure['flags_raw'] & 0x4);
$atomstructure['flags']['in_poster'] = (bool) ($atomstructure['flags_raw'] & 0x8);
$atomstructure['creation_time_unix'] = DateMac2Unix($atomstructure['creation_time']);
$atomstructure['modify_time_unix'] = DateMac2Unix($atomstructure['modify_time']);
if (!isset($ThisFileInfo['video']['resolution_x']) || !isset($ThisFileInfo['video']['resolution_y'])) {
$ThisFileInfo['video']['resolution_x'] = $atomstructure['width'];
$ThisFileInfo['video']['resolution_y'] = $atomstructure['height'];
}
$ThisFileInfo['video']['resolution_x'] = max($ThisFileInfo['video']['resolution_x'], $atomstructure['width']);
$ThisFileInfo['video']['resolution_y'] = max($ThisFileInfo['video']['resolution_y'], $atomstructure['height']);
if (!empty($ThisFileInfo['video']['resolution_x']) && !empty($ThisFileInfo['video']['resolution_y'])) {
$ThisFileInfo['quicktime']['video']['resolution_x'] = $ThisFileInfo['video']['resolution_x'];
$ThisFileInfo['quicktime']['video']['resolution_y'] = $ThisFileInfo['video']['resolution_y'];
} else {
unset($ThisFileInfo['video']['resolution_x']);
unset($ThisFileInfo['video']['resolution_y']);
unset($ThisFileInfo['quicktime']['video']);
}
break;
case 'mdat':
// Media DATa atom
// Media DATa atom
case 'free':
// FREE space atom
// FREE space atom
case 'skip':
// SKIP atom
// SKIP atom
case 'wide':
// 64-bit expansion placeholder atom
// 'mdat' data is too big to deal with, contains no useful metadata
// 'free', 'skip' and 'wide' are just padding, contains no useful data at all
// When writing QuickTime files, it is sometimes necessary to update an atom's size.
// It is impossible to update a 32-bit atom to a 64-bit atom since the 32-bit atom
// is only 8 bytes in size, and the 64-bit atom requires 16 bytes. Therefore, QuickTime
// puts an 8-byte placeholder atom before any atoms it may have to update the size of.
// In this way, if the atom needs to be converted from a 32-bit to a 64-bit atom, the
// placeholder atom can be overwritten to obtain the necessary 8 extra bytes.
// The placeholder atom has a type of kWideAtomPlaceholderType ( 'wide' ).
break;
default:
$ThisFileInfo['warning'] .= "\n" . 'Unknown QuickTime atom type: "' . $atomname . '" at offset ' . $baseoffset;
$atomstructure['data'] = $atomdata;
break;
}
array_pop($atomHierarchy);
return $atomstructure;
}
){kind=link}