rlm@3: <?php
rlm@3: // +----------------------------------------------------------------------+
rlm@3: // | PHP version 5                                                        |
rlm@3: // +----------------------------------------------------------------------+
rlm@3: // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen                 |
rlm@3: // +----------------------------------------------------------------------+
rlm@3: // | This source file is subject to version 2 of the GPL license,         |
rlm@3: // | that is bundled with this package in the file license.txt and is     |
rlm@3: // | available through the world-wide-web at the following url:           |
rlm@3: // | http://www.gnu.org/copyleft/gpl.html                                 |
rlm@3: // +----------------------------------------------------------------------+
rlm@3: // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |
rlm@3: // +----------------------------------------------------------------------+
rlm@3: // | Authors: James Heinrich <infoØgetid3*org>                            |
rlm@3: // |          Allan Hansen <ahØartemis*dk>                                |
rlm@3: // +----------------------------------------------------------------------+
rlm@3: // | module.graphic.bmp.php                                               |
rlm@3: // | Module for analyzing BMP graphic files.                              |
rlm@3: // | dependencies: NONE                                                   |
rlm@3: // +----------------------------------------------------------------------+
rlm@3: //
rlm@3: // $Id: module.graphic.bmp.php,v 1.4 2006/11/02 10:48:02 ah Exp $
rlm@3: 
rlm@3:         
rlm@3:         
rlm@3: class getid3_bmp extends getid3_handler
rlm@3: {
rlm@3: 
rlm@3: 
rlm@3:     public function Analyze() {
rlm@3: 
rlm@3:         $getid3 = $this->getid3;
rlm@3: 
rlm@3:         // BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
rlm@3:         // all versions
rlm@3:         // WORD    bfType;
rlm@3:         // DWORD   bfSize;
rlm@3:         // WORD    bfReserved1;
rlm@3:         // WORD    bfReserved2;
rlm@3:         // DWORD   bfOffBits;
rlm@3:         
rlm@3:         // shortcuts
rlm@3:         $getid3->info['bmp']['header']['raw'] = array ();
rlm@3:         $info_bmp            = &$getid3->info['bmp'];
rlm@3:         $info_bmp_header     = &$info_bmp['header'];
rlm@3:         $info_bmp_header_raw = &$info_bmp_header['raw'];
rlm@3: 
rlm@3:         fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
rlm@3:         $bmp_header = fread($getid3->fp, 14 + 40);
rlm@3: 
rlm@3:         // Magic bytes
rlm@3:         $info_bmp_header_raw['identifier'] = 'BM';
rlm@3:         
rlm@3:         getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 2,
rlm@3:             array (
rlm@3:                 'filesize'    => 4,
rlm@3:                 'reserved1'   => 2,
rlm@3:                 'reserved2'   => 2,
rlm@3:                 'data_offset' => 4,
rlm@3:                 'header_size' => 4
rlm@3:             )
rlm@3:         );
rlm@3:         
rlm@3:         // Check if the hardcoded-to-1 "planes" is at offset 22 or 26
rlm@3:         $planes22 = getid3_lib::LittleEndian2Int(substr($bmp_header, 22, 2));
rlm@3:         $planes26 = getid3_lib::LittleEndian2Int(substr($bmp_header, 26, 2));
rlm@3:         if (($planes22 == 1) && ($planes26 != 1)) {
rlm@3:             $info_bmp['type_os']      = 'OS/2';
rlm@3:             $info_bmp['type_version'] = 1;
rlm@3:         } 
rlm@3:         elseif (($planes26 == 1) && ($planes22 != 1)) {
rlm@3:             $info_bmp['type_os']      = 'Windows';
rlm@3:             $info_bmp['type_version'] = 1;
rlm@3:         } 
rlm@3:         elseif ($info_bmp_header_raw['header_size'] == 12) {
rlm@3:             $info_bmp['type_os']      = 'OS/2';
rlm@3:             $info_bmp['type_version'] = 1;
rlm@3:         } 
rlm@3:         elseif ($info_bmp_header_raw['header_size'] == 40) {
rlm@3:             $info_bmp['type_os']      = 'Windows';
rlm@3:             $info_bmp['type_version'] = 1;
rlm@3:         } 
rlm@3:         elseif ($info_bmp_header_raw['header_size'] == 84) {
rlm@3:             $info_bmp['type_os']      = 'Windows';
rlm@3:             $info_bmp['type_version'] = 4;
rlm@3:         } 
rlm@3:         elseif ($info_bmp_header_raw['header_size'] == 100) {
rlm@3:             $info_bmp['type_os']      = 'Windows';
rlm@3:             $info_bmp['type_version'] = 5;
rlm@3:         } 
rlm@3:         else {
rlm@3:             throw new getid3_exception('Unknown BMP subtype (or not a BMP file)');
rlm@3:         }
rlm@3: 
rlm@3:         $getid3->info['fileformat']                  = 'bmp';
rlm@3:         $getid3->info['video']['dataformat']         = 'bmp';
rlm@3:         $getid3->info['video']['lossless']           = true;
rlm@3:         $getid3->info['video']['pixel_aspect_ratio'] = (float)1;
rlm@3: 
rlm@3:         if ($info_bmp['type_os'] == 'OS/2') {
rlm@3: 
rlm@3:             // OS/2-format BMP
rlm@3:             // http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
rlm@3: 
rlm@3:             // DWORD  Size;             /* Size of this structure in bytes */
rlm@3:             // DWORD  Width;            /* Bitmap width in pixels */
rlm@3:             // DWORD  Height;           /* Bitmap height in pixel */
rlm@3:             // WORD   NumPlanes;        /* Number of bit planes (color depth) */
rlm@3:             // WORD   BitsPerPixel;     /* Number of bits per pixel per plane */
rlm@3:             
rlm@3:             getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 18,
rlm@3:                 array (
rlm@3:                     'width'          => 2,
rlm@3:                     'height'         => 2,
rlm@3:                     'planes'         => 2,
rlm@3:                     'bits_per_pixel' => 2
rlm@3:                 )
rlm@3:             );
rlm@3:             
rlm@3:             $getid3->info['video']['resolution_x']    = $info_bmp_header_raw['width'];
rlm@3:             $getid3->info['video']['resolution_y']    = $info_bmp_header_raw['height'];
rlm@3:             $getid3->info['video']['codec']           = 'BI_RGB '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
rlm@3:             $getid3->info['video']['bits_per_sample'] = $info_bmp_header_raw['bits_per_pixel'];
rlm@3:             
rlm@3:             if ($info_bmp['type_version'] >= 2) {
rlm@3:                 // DWORD  Compression;      /* Bitmap compression scheme */
rlm@3:                 // DWORD  ImageDataSize;    /* Size of bitmap data in bytes */
rlm@3:                 // DWORD  XResolution;      /* X resolution of display device */
rlm@3:                 // DWORD  YResolution;      /* Y resolution of display device */
rlm@3:                 // DWORD  ColorsUsed;       /* Number of color table indices used */
rlm@3:                 // DWORD  ColorsImportant;  /* Number of important color indices */
rlm@3:                 // WORD   Units;            /* Type of units used to measure resolution */
rlm@3:                 // WORD   Reserved;         /* Pad structure to 4-byte boundary */
rlm@3:                 // WORD   Recording;        /* Recording algorithm */
rlm@3:                 // WORD   Rendering;        /* Halftoning algorithm used */
rlm@3:                 // DWORD  Size1;            /* Reserved for halftoning algorithm use */
rlm@3:                 // DWORD  Size2;            /* Reserved for halftoning algorithm use */
rlm@3:                 // DWORD  ColorEncoding;    /* Color model used in bitmap */
rlm@3:                 // DWORD  Identifier;       /* Reserved for application use */
rlm@3:                 
rlm@3:                 getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 26,
rlm@3:                     array (
rlm@3:                         'compression'      => 4,
rlm@3:                         'bmp_data_size'    => 4,
rlm@3:                         'resolution_h'     => 4,
rlm@3:                         'resolution_v'     => 4,
rlm@3:                         'colors_used'      => 4,
rlm@3:                         'colors_important' => 4,
rlm@3:                         'resolution_units' => 2,
rlm@3:                         'reserved1'        => 2,
rlm@3:                         'recording'        => 2,
rlm@3:                         'rendering'        => 2,
rlm@3:                         'size1'            => 4,
rlm@3:                         'size2'            => 4,
rlm@3:                         'color_encoding'   => 4,
rlm@3:                         'identifier'       => 4
rlm@3:                     )
rlm@3:                 );
rlm@3: 
rlm@3:                 $info_bmp_header['compression'] = getid3_bmp::BMPcompressionOS2Lookup($info_bmp_header_raw['compression']);
rlm@3:                 $getid3->info['video']['codec'] = $info_bmp_header['compression'].' '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
rlm@3:             }
rlm@3:             
rlm@3:             return true;
rlm@3:         } 
rlm@3:     
rlm@3:         
rlm@3:         if ($info_bmp['type_os'] == 'Windows') {
rlm@3: 
rlm@3:             // Windows-format BMP
rlm@3: 
rlm@3:             // BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
rlm@3:             // all versions
rlm@3:             // DWORD  biSize;
rlm@3:             // LONG   biWidth;
rlm@3:             // LONG   biHeight;
rlm@3:             // WORD   biPlanes;
rlm@3:             // WORD   biBitCount;
rlm@3:             // DWORD  biCompression;
rlm@3:             // DWORD  biSizeImage;
rlm@3:             // LONG   biXPelsPerMeter;
rlm@3:             // LONG   biYPelsPerMeter;
rlm@3:             // DWORD  biClrUsed;
rlm@3:             // DWORD  biClrImportant;
rlm@3: 
rlm@3:             getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 18,
rlm@3:                 array (
rlm@3:                     'width'            => -4,        //signed
rlm@3:                     'height'           => -4,        //signed
rlm@3:                     'planes'           => 2,
rlm@3:                     'bits_per_pixel'   => 2,
rlm@3:                     'compression'      => 4,
rlm@3:                     'bmp_data_size'    => 4,
rlm@3:                     'resolution_h'     => -4,        //signed
rlm@3:                     'resolution_v'     => -4,        //signed
rlm@3:                     'colors_used'      => 4,
rlm@3:                     'colors_important' => 4
rlm@3:                 )
rlm@3:             );
rlm@3:             foreach (array ('width', 'height', 'resolution_h', 'resolution_v') as $key) {
rlm@3:                 $info_bmp_header_raw[$key] = getid3_lib::LittleEndian2Int($info_bmp_header_raw[$key], true);
rlm@3:             }
rlm@3:             
rlm@3:             $info_bmp_header['compression']           = getid3_bmp::BMPcompressionWindowsLookup($info_bmp_header_raw['compression']);
rlm@3:             $getid3->info['video']['resolution_x']    = $info_bmp_header_raw['width'];
rlm@3:             $getid3->info['video']['resolution_y']    = $info_bmp_header_raw['height'];
rlm@3:             $getid3->info['video']['codec']           = $info_bmp_header['compression'].' '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
rlm@3:             $getid3->info['video']['bits_per_sample'] = $info_bmp_header_raw['bits_per_pixel'];
rlm@3: 
rlm@3:             // should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen
rlm@3:             if (($info_bmp['type_version'] >= 4) || ($info_bmp_header_raw['compression'] == 3)) {
rlm@3:   	            
rlm@3:                 
rlm@3:                 $bmp_header .= fread($getid3->fp, 44);
rlm@3: 
rlm@3:                 // BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
rlm@3:                 // Win95+, WinNT4.0+
rlm@3:                 // DWORD        bV4RedMask;
rlm@3:                 // DWORD        bV4GreenMask;
rlm@3:                 // DWORD        bV4BlueMask;
rlm@3:                 // DWORD        bV4AlphaMask;
rlm@3:                 // DWORD        bV4CSType;
rlm@3:                 // CIEXYZTRIPLE bV4Endpoints;
rlm@3:                 // DWORD        bV4GammaRed;
rlm@3:                 // DWORD        bV4GammaGreen;
rlm@3:                 // DWORD        bV4GammaBlue;
rlm@3:                 
rlm@3:                 getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 54,
rlm@3:                     array (
rlm@3:                         'red_mask'     => 4,
rlm@3:                         'green_mask'   => 4,
rlm@3:                         'blue_mask'    => 4,
rlm@3:                         'alpha_mask'   => 4,
rlm@3:                         'cs_type'      => 4,
rlm@3:                         'ciexyz_red'   => -4,       //string
rlm@3:                         'ciexyz_green' => -4,       //string
rlm@3:                         'ciexyz_blue'  => -4,       //string
rlm@3:                         'gamma_red'    => 4,
rlm@3:                         'gamma_green'  => 4,
rlm@3:                         'gamma_blue'   => 4
rlm@3:                     )
rlm@3:                 );
rlm@3:                 
rlm@3:                 $info_bmp_header['ciexyz_red']   = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_red']));
rlm@3:                 $info_bmp_header['ciexyz_green'] = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_green']));
rlm@3:                 $info_bmp_header['ciexyz_blue']  = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_blue']));
rlm@3:             
rlm@3: 
rlm@3:                 if ($info_bmp['type_version'] >= 5) {
rlm@3:                     $bmp_header .= fread($getid3->fp, 16);
rlm@3:     
rlm@3:                     // BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
rlm@3:                     // Win98+, Win2000+
rlm@3:                     // DWORD        bV5Intent;
rlm@3:                     // DWORD        bV5ProfileData;
rlm@3:                     // DWORD        bV5ProfileSize;
rlm@3:                     // DWORD        bV5Reserved;
rlm@3:                     
rlm@3:                     getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 98,
rlm@3:                         array (
rlm@3:                             'intent'              => 4,
rlm@3:                             'profile_data_offset' => 4,
rlm@3:                             'profile_data_size'   => 4,
rlm@3:                             'reserved3'           => 4
rlm@3:                         )
rlm@3:                     );
rlm@3:                     
rlm@3:                 }
rlm@3:             }
rlm@3:             
rlm@3:             return true;
rlm@3:         }
rlm@3: 
rlm@3: 
rlm@3:         throw new getid3_exception('Unknown BMP format in header.');
rlm@3:         
rlm@3:     }
rlm@3: 
rlm@3: 
rlm@3: 
rlm@3:     public static function BMPcompressionWindowsLookup($compression_id) {
rlm@3: 
rlm@3:         static $lookup = array (
rlm@3:             0 => 'BI_RGB',
rlm@3:             1 => 'BI_RLE8',
rlm@3:             2 => 'BI_RLE4',
rlm@3:             3 => 'BI_BITFIELDS',
rlm@3:             4 => 'BI_JPEG',
rlm@3:             5 => 'BI_PNG'
rlm@3:         );
rlm@3:         return (isset($lookup[$compression_id]) ? $lookup[$compression_id] : 'invalid');
rlm@3:     }
rlm@3: 
rlm@3: 
rlm@3: 
rlm@3:     public static function BMPcompressionOS2Lookup($compression_id) {
rlm@3:         
rlm@3:         static $lookup = array (
rlm@3:             0 => 'BI_RGB',
rlm@3:             1 => 'BI_RLE8',
rlm@3:             2 => 'BI_RLE4',
rlm@3:             3 => 'Huffman 1D',
rlm@3:             4 => 'BI_RLE24',
rlm@3:         );
rlm@3:         return (isset($lookup[$compression_id]) ? $lookup[$compression_id] : 'invalid');
rlm@3:     }
rlm@3:     
rlm@3:     
rlm@3:     public static function FixedPoint2_30($raw_data) {
rlm@3:         
rlm@3:         $binary_string = getid3_lib::BigEndian2Bin($raw_data);
rlm@3:         return bindec(substr($binary_string, 0, 2)) + (float)(bindec(substr($binary_string, 2, 30)) / 1073741824);        // pow(2, 30) = 1073741824
rlm@3:     }
rlm@3: 
rlm@3: 
rlm@3: }
rlm@3: 
rlm@3: 
rlm@3: ?>