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-rw-r--r--modules/getid3/module.graphic.bmp.php319
1 files changed, 319 insertions, 0 deletions
diff --git a/modules/getid3/module.graphic.bmp.php b/modules/getid3/module.graphic.bmp.php
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+<?php
+// +----------------------------------------------------------------------+
+// | PHP version 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
+// +----------------------------------------------------------------------+
+// | This source file is subject to version 2 of the GPL license, |
+// | that is bundled with this package in the file license.txt and is |
+// | available through the world-wide-web at the following url: |
+// | http://www.gnu.org/copyleft/gpl.html |
+// +----------------------------------------------------------------------+
+// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
+// +----------------------------------------------------------------------+
+// | Authors: James Heinrich <infoØgetid3*org> |
+// | Allan Hansen <ahØartemis*dk> |
+// +----------------------------------------------------------------------+
+// | module.graphic.bmp.php |
+// | Module for analyzing BMP graphic files. |
+// | dependencies: NONE |
+// +----------------------------------------------------------------------+
+//
+// $Id: module.graphic.bmp.php,v 1.4 2006/11/02 10:48:02 ah Exp $
+
+
+
+class getid3_bmp extends getid3_handler
+{
+
+
+ public function Analyze() {
+
+ $getid3 = $this->getid3;
+
+ // 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;
+
+ // shortcuts
+ $getid3->info['bmp']['header']['raw'] = array ();
+ $info_bmp = &$getid3->info['bmp'];
+ $info_bmp_header = &$info_bmp['header'];
+ $info_bmp_header_raw = &$info_bmp_header['raw'];
+
+ fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
+ $bmp_header = fread($getid3->fp, 14 + 40);
+
+ // Magic bytes
+ $info_bmp_header_raw['identifier'] = 'BM';
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 2,
+ array (
+ 'filesize' => 4,
+ 'reserved1' => 2,
+ 'reserved2' => 2,
+ 'data_offset' => 4,
+ 'header_size' => 4
+ )
+ );
+
+ // Check if the hardcoded-to-1 "planes" is at offset 22 or 26
+ $planes22 = getid3_lib::LittleEndian2Int(substr($bmp_header, 22, 2));
+ $planes26 = getid3_lib::LittleEndian2Int(substr($bmp_header, 26, 2));
+ if (($planes22 == 1) && ($planes26 != 1)) {
+ $info_bmp['type_os'] = 'OS/2';
+ $info_bmp['type_version'] = 1;
+ }
+ elseif (($planes26 == 1) && ($planes22 != 1)) {
+ $info_bmp['type_os'] = 'Windows';
+ $info_bmp['type_version'] = 1;
+ }
+ elseif ($info_bmp_header_raw['header_size'] == 12) {
+ $info_bmp['type_os'] = 'OS/2';
+ $info_bmp['type_version'] = 1;
+ }
+ elseif ($info_bmp_header_raw['header_size'] == 40) {
+ $info_bmp['type_os'] = 'Windows';
+ $info_bmp['type_version'] = 1;
+ }
+ elseif ($info_bmp_header_raw['header_size'] == 84) {
+ $info_bmp['type_os'] = 'Windows';
+ $info_bmp['type_version'] = 4;
+ }
+ elseif ($info_bmp_header_raw['header_size'] == 100) {
+ $info_bmp['type_os'] = 'Windows';
+ $info_bmp['type_version'] = 5;
+ }
+ else {
+ throw new getid3_exception('Unknown BMP subtype (or not a BMP file)');
+ }
+
+ $getid3->info['fileformat'] = 'bmp';
+ $getid3->info['video']['dataformat'] = 'bmp';
+ $getid3->info['video']['lossless'] = true;
+ $getid3->info['video']['pixel_aspect_ratio'] = (float)1;
+
+ if ($info_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 */
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 18,
+ array (
+ 'width' => 2,
+ 'height' => 2,
+ 'planes' => 2,
+ 'bits_per_pixel' => 2
+ )
+ );
+
+ $getid3->info['video']['resolution_x'] = $info_bmp_header_raw['width'];
+ $getid3->info['video']['resolution_y'] = $info_bmp_header_raw['height'];
+ $getid3->info['video']['codec'] = 'BI_RGB '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
+ $getid3->info['video']['bits_per_sample'] = $info_bmp_header_raw['bits_per_pixel'];
+
+ if ($info_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 */
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 26,
+ array (
+ 'compression' => 4,
+ 'bmp_data_size' => 4,
+ 'resolution_h' => 4,
+ 'resolution_v' => 4,
+ 'colors_used' => 4,
+ 'colors_important' => 4,
+ 'resolution_units' => 2,
+ 'reserved1' => 2,
+ 'recording' => 2,
+ 'rendering' => 2,
+ 'size1' => 4,
+ 'size2' => 4,
+ 'color_encoding' => 4,
+ 'identifier' => 4
+ )
+ );
+
+ $info_bmp_header['compression'] = getid3_bmp::BMPcompressionOS2Lookup($info_bmp_header_raw['compression']);
+ $getid3->info['video']['codec'] = $info_bmp_header['compression'].' '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
+ }
+
+ return true;
+ }
+
+
+ if ($info_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;
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 18,
+ array (
+ 'width' => -4, //signed
+ 'height' => -4, //signed
+ 'planes' => 2,
+ 'bits_per_pixel' => 2,
+ 'compression' => 4,
+ 'bmp_data_size' => 4,
+ 'resolution_h' => -4, //signed
+ 'resolution_v' => -4, //signed
+ 'colors_used' => 4,
+ 'colors_important' => 4
+ )
+ );
+ foreach (array ('width', 'height', 'resolution_h', 'resolution_v') as $key) {
+ $info_bmp_header_raw[$key] = getid3_lib::LittleEndian2Int($info_bmp_header_raw[$key], true);
+ }
+
+ $info_bmp_header['compression'] = getid3_bmp::BMPcompressionWindowsLookup($info_bmp_header_raw['compression']);
+ $getid3->info['video']['resolution_x'] = $info_bmp_header_raw['width'];
+ $getid3->info['video']['resolution_y'] = $info_bmp_header_raw['height'];
+ $getid3->info['video']['codec'] = $info_bmp_header['compression'].' '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
+ $getid3->info['video']['bits_per_sample'] = $info_bmp_header_raw['bits_per_pixel'];
+
+ // should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen
+ if (($info_bmp['type_version'] >= 4) || ($info_bmp_header_raw['compression'] == 3)) {
+
+
+ $bmp_header .= fread($getid3->fp, 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;
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 54,
+ array (
+ 'red_mask' => 4,
+ 'green_mask' => 4,
+ 'blue_mask' => 4,
+ 'alpha_mask' => 4,
+ 'cs_type' => 4,
+ 'ciexyz_red' => -4, //string
+ 'ciexyz_green' => -4, //string
+ 'ciexyz_blue' => -4, //string
+ 'gamma_red' => 4,
+ 'gamma_green' => 4,
+ 'gamma_blue' => 4
+ )
+ );
+
+ $info_bmp_header['ciexyz_red'] = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_red']));
+ $info_bmp_header['ciexyz_green'] = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_green']));
+ $info_bmp_header['ciexyz_blue'] = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_blue']));
+
+
+ if ($info_bmp['type_version'] >= 5) {
+ $bmp_header .= fread($getid3->fp, 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;
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 98,
+ array (
+ 'intent' => 4,
+ 'profile_data_offset' => 4,
+ 'profile_data_size' => 4,
+ 'reserved3' => 4
+ )
+ );
+
+ }
+ }
+
+ return true;
+ }
+
+
+ throw new getid3_exception('Unknown BMP format in header.');
+
+ }
+
+
+
+ public static function BMPcompressionWindowsLookup($compression_id) {
+
+ static $lookup = array (
+ 0 => 'BI_RGB',
+ 1 => 'BI_RLE8',
+ 2 => 'BI_RLE4',
+ 3 => 'BI_BITFIELDS',
+ 4 => 'BI_JPEG',
+ 5 => 'BI_PNG'
+ );
+ return (isset($lookup[$compression_id]) ? $lookup[$compression_id] : 'invalid');
+ }
+
+
+
+ public static function BMPcompressionOS2Lookup($compression_id) {
+
+ static $lookup = array (
+ 0 => 'BI_RGB',
+ 1 => 'BI_RLE8',
+ 2 => 'BI_RLE4',
+ 3 => 'Huffman 1D',
+ 4 => 'BI_RLE24',
+ );
+ return (isset($lookup[$compression_id]) ? $lookup[$compression_id] : 'invalid');
+ }
+
+
+ public static function FixedPoint2_30($raw_data) {
+
+ $binary_string = getid3_lib::BigEndian2Bin($raw_data);
+ return bindec(substr($binary_string, 0, 2)) + (float)(bindec(substr($binary_string, 2, 30)) / 1073741824); // pow(2, 30) = 1073741824
+ }
+
+
+}
+
+
+?> \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-08-13 09:52:22 +0000