Mercurial > judyates
diff e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.aac_adif.php @ 3:3f6b44aa6b35 judyates
[svn r4] added ability to buy stuff, from a Prints page, but it doesn't work well with the css, and it also has not been fitted into the perl make system.
| author | rlm |
|---|---|
| date | Mon, 22 Feb 2010 08:02:39 -0500 |
| parents | |
| children |
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1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.aac_adif.php Mon Feb 22 08:02:39 2010 -0500 1.3 @@ -0,0 +1,311 @@ 1.4 +<?php 1.5 +// +----------------------------------------------------------------------+ 1.6 +// | PHP version 5 | 1.7 +// +----------------------------------------------------------------------+ 1.8 +// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | 1.9 +// +----------------------------------------------------------------------+ 1.10 +// | This source file is subject to version 2 of the GPL license, | 1.11 +// | that is bundled with this package in the file license.txt and is | 1.12 +// | available through the world-wide-web at the following url: | 1.13 +// | http://www.gnu.org/copyleft/gpl.html | 1.14 +// +----------------------------------------------------------------------+ 1.15 +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | 1.16 +// +----------------------------------------------------------------------+ 1.17 +// | Authors: James Heinrich <infoØgetid3*org> | 1.18 +// | Allan Hansen <ahØartemis*dk> | 1.19 +// +----------------------------------------------------------------------+ 1.20 +// | module.audio.aac_adif.php | 1.21 +// | Module for analyzing AAC files with ADIF header. | 1.22 +// | dependencies: NONE | 1.23 +// +----------------------------------------------------------------------+ 1.24 +// 1.25 +// $Id: module.audio.aac_adif.php,v 1.3 2006/11/02 10:48:00 ah Exp $ 1.26 + 1.27 + 1.28 + 1.29 +class getid3_aac_adif extends getid3_handler 1.30 +{ 1.31 + 1.32 + public function Analyze() { 1.33 + 1.34 + $getid3 = $this->getid3; 1.35 + 1.36 + // http://faac.sourceforge.net/wiki/index.php?page=ADIF 1.37 + // http://libmpeg.org/mpeg4/doc/w2203tfs.pdf 1.38 + // adif_header() { 1.39 + // adif_id 32 1.40 + // copyright_id_present 1 1.41 + // if( copyright_id_present ) 1.42 + // copyright_id 72 1.43 + // original_copy 1 1.44 + // home 1 1.45 + // bitstream_type 1 1.46 + // bitrate 23 1.47 + // num_program_config_elements 4 1.48 + // for (i = 0; i < num_program_config_elements + 1; i++ ) { 1.49 + // if( bitstream_type == '0' ) 1.50 + // adif_buffer_fullness 20 1.51 + // program_config_element() 1.52 + // } 1.53 + // } 1.54 + 1.55 + 1.56 + $getid3->info['fileformat'] = 'aac'; 1.57 + $getid3->info['audio']['dataformat'] = 'aac'; 1.58 + $getid3->info['audio']['lossless'] = false; 1.59 + 1.60 + $getid3->info['aac']['header'] = array () ; 1.61 + $info_aac = &$getid3->info['aac']; 1.62 + $info_aac_header = & $info_aac['header']; 1.63 + 1.64 + fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); 1.65 + $aac_header_bitstream = getid3_lib::BigEndian2Bin(fread($getid3->fp, 1024)); 1.66 + 1.67 + $info_aac['header_type'] = 'ADIF'; 1.68 + $info_aac_header['mpeg_version'] = 4; 1.69 + $bit_offset = 32; 1.70 + 1.71 + $info_aac_header['copyright'] = $aac_header_bitstream{$bit_offset++} == '1'; 1.72 + if ($info_aac_header['copyright']) { 1.73 + $info_aac_header['copyright_id'] = getid3_aac_adif::Bin2String(substr($aac_header_bitstream, $bit_offset, 72)); 1.74 + $bit_offset += 72; 1.75 + } 1.76 + 1.77 + $info_aac_header['original_copy'] = $aac_header_bitstream{$bit_offset++} == '1'; 1.78 + $info_aac_header['home'] = $aac_header_bitstream{$bit_offset++} == '1'; 1.79 + $info_aac_header['is_vbr'] = $aac_header_bitstream{$bit_offset++} == '1'; 1.80 + 1.81 + if ($info_aac_header['is_vbr']) { 1.82 + $getid3->info['audio']['bitrate_mode'] = 'vbr'; 1.83 + $info_aac_header['bitrate_max'] = bindec(substr($aac_header_bitstream, $bit_offset, 23)); 1.84 + $bit_offset += 23; 1.85 + } 1.86 + else { 1.87 + $getid3->info['audio']['bitrate_mode'] = 'cbr'; 1.88 + $info_aac_header['bitrate'] = bindec(substr($aac_header_bitstream, $bit_offset, 23)); 1.89 + $bit_offset += 23; 1.90 + $getid3->info['audio']['bitrate'] = $info_aac_header['bitrate']; 1.91 + } 1.92 + 1.93 + $info_aac_header['num_program_configs'] = 1 + bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.94 + $bit_offset += 4; 1.95 + 1.96 + for ($i = 0; $i < $info_aac_header['num_program_configs']; $i++) { 1.97 + 1.98 + // http://www.audiocoding.com/wiki/index.php?page=program_config_element 1.99 + 1.100 + // buffer_fullness 20 1.101 + 1.102 + // element_instance_tag 4 1.103 + // object_type 2 1.104 + // sampling_frequency_index 4 1.105 + // num_front_channel_elements 4 1.106 + // num_side_channel_elements 4 1.107 + // num_back_channel_elements 4 1.108 + // num_lfe_channel_elements 2 1.109 + // num_assoc_data_elements 3 1.110 + // num_valid_cc_elements 4 1.111 + // mono_mixdown_present 1 1.112 + // mono_mixdown_element_number 4 if mono_mixdown_present == 1 1.113 + // stereo_mixdown_present 1 1.114 + // stereo_mixdown_element_number 4 if stereo_mixdown_present == 1 1.115 + // matrix_mixdown_idx_present 1 1.116 + // matrix_mixdown_idx 2 if matrix_mixdown_idx_present == 1 1.117 + // pseudo_surround_enable 1 if matrix_mixdown_idx_present == 1 1.118 + // for (i = 0; i < num_front_channel_elements; i++) { 1.119 + // front_element_is_cpe[i] 1 1.120 + // front_element_tag_select[i] 4 1.121 + // } 1.122 + // for (i = 0; i < num_side_channel_elements; i++) { 1.123 + // side_element_is_cpe[i] 1 1.124 + // side_element_tag_select[i] 4 1.125 + // } 1.126 + // for (i = 0; i < num_back_channel_elements; i++) { 1.127 + // back_element_is_cpe[i] 1 1.128 + // back_element_tag_select[i] 4 1.129 + // } 1.130 + // for (i = 0; i < num_lfe_channel_elements; i++) { 1.131 + // lfe_element_tag_select[i] 4 1.132 + // } 1.133 + // for (i = 0; i < num_assoc_data_elements; i++) { 1.134 + // assoc_data_element_tag_select[i] 4 1.135 + // } 1.136 + // for (i = 0; i < num_valid_cc_elements; i++) { 1.137 + // cc_element_is_ind_sw[i] 1 1.138 + // valid_cc_element_tag_select[i] 4 1.139 + // } 1.140 + // byte_alignment() VAR 1.141 + // comment_field_bytes 8 1.142 + // for (i = 0; i < comment_field_bytes; i++) { 1.143 + // comment_field_data[i] 8 1.144 + // } 1.145 + 1.146 + $info_aac['program_configs'][$i] = array (); 1.147 + $info_aac_program_configs_i = &$info_aac['program_configs'][$i]; 1.148 + 1.149 + if (!$info_aac_header['is_vbr']) { 1.150 + $info_aac_program_configs_i['buffer_fullness'] = bindec(substr($aac_header_bitstream, $bit_offset, 20)); 1.151 + $bit_offset += 20; 1.152 + } 1.153 + 1.154 + $info_aac_program_configs_i['element_instance_tag'] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.155 + $info_aac_program_configs_i['object_type'] = bindec(substr($aac_header_bitstream, $bit_offset + 4, 2)); 1.156 + $info_aac_program_configs_i['sampling_frequency_index'] = bindec(substr($aac_header_bitstream, $bit_offset + 6, 4)); 1.157 + $info_aac_program_configs_i['num_front_channel_elements'] = bindec(substr($aac_header_bitstream, $bit_offset + 10, 4)); 1.158 + $info_aac_program_configs_i['num_side_channel_elements'] = bindec(substr($aac_header_bitstream, $bit_offset + 14, 4)); 1.159 + $info_aac_program_configs_i['num_back_channel_elements'] = bindec(substr($aac_header_bitstream, $bit_offset + 18, 4)); 1.160 + $info_aac_program_configs_i['num_lfe_channel_elements'] = bindec(substr($aac_header_bitstream, $bit_offset + 22, 2)); 1.161 + $info_aac_program_configs_i['num_assoc_data_elements'] = bindec(substr($aac_header_bitstream, $bit_offset + 24, 3)); 1.162 + $info_aac_program_configs_i['num_valid_cc_elements'] = bindec(substr($aac_header_bitstream, $bit_offset + 27, 4)); 1.163 + $bit_offset += 31; 1.164 + 1.165 + $info_aac_program_configs_i['mono_mixdown_present'] = $aac_header_bitstream{$bit_offset++} == 1; 1.166 + if ($info_aac_program_configs_i['mono_mixdown_present']) { 1.167 + $info_aac_program_configs_i['mono_mixdown_element_number'] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.168 + $bit_offset += 4; 1.169 + } 1.170 + 1.171 + $info_aac_program_configs_i['stereo_mixdown_present'] = $aac_header_bitstream{$bit_offset++} == 1; 1.172 + if ($info_aac_program_configs_i['stereo_mixdown_present']) { 1.173 + $info_aac_program_configs_i['stereo_mixdown_element_number'] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.174 + $bit_offset += 4; 1.175 + } 1.176 + 1.177 + $info_aac_program_configs_i['matrix_mixdown_idx_present'] = $aac_header_bitstream{$bit_offset++} == 1; 1.178 + if ($info_aac_program_configs_i['matrix_mixdown_idx_present']) { 1.179 + $info_aac_program_configs_i['matrix_mixdown_idx'] = bindec(substr($aac_header_bitstream, $bit_offset, 2)); 1.180 + $bit_offset += 2; 1.181 + $info_aac_program_configs_i['pseudo_surround_enable'] = $aac_header_bitstream{$bit_offset++} == 1; 1.182 + } 1.183 + 1.184 + for ($j = 0; $j < $info_aac_program_configs_i['num_front_channel_elements']; $j++) { 1.185 + $info_aac_program_configs_i['front_element_is_cpe'][$j] = $aac_header_bitstream{$bit_offset++} == 1; 1.186 + $info_aac_program_configs_i['front_element_tag_select'][$j] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.187 + $bit_offset += 4; 1.188 + } 1.189 + for ($j = 0; $j < $info_aac_program_configs_i['num_side_channel_elements']; $j++) { 1.190 + $info_aac_program_configs_i['side_element_is_cpe'][$j] = $aac_header_bitstream{$bit_offset++} == 1; 1.191 + $info_aac_program_configs_i['side_element_tag_select'][$j] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.192 + $bit_offset += 4; 1.193 + } 1.194 + for ($j = 0; $j < $info_aac_program_configs_i['num_back_channel_elements']; $j++) { 1.195 + $info_aac_program_configs_i['back_element_is_cpe'][$j] = $aac_header_bitstream{$bit_offset++} == 1; 1.196 + $info_aac_program_configs_i['back_element_tag_select'][$j] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.197 + $bit_offset += 4; 1.198 + } 1.199 + for ($j = 0; $j < $info_aac_program_configs_i['num_lfe_channel_elements']; $j++) { 1.200 + $info_aac_program_configs_i['lfe_element_tag_select'][$j] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.201 + $bit_offset += 4; 1.202 + } 1.203 + for ($j = 0; $j < $info_aac_program_configs_i['num_assoc_data_elements']; $j++) { 1.204 + $info_aac_program_configs_i['assoc_data_element_tag_select'][$j] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.205 + $bit_offset += 4; 1.206 + } 1.207 + for ($j = 0; $j < $info_aac_program_configs_i['num_valid_cc_elements']; $j++) { 1.208 + $info_aac_program_configs_i['cc_element_is_ind_sw'][$j] = $aac_header_bitstream{$bit_offset++} == 1; 1.209 + $info_aac_program_configs_i['valid_cc_element_tag_select'][$j] = bindec(substr($aac_header_bitstream, $bit_offset, 4)); 1.210 + $bit_offset += 4; 1.211 + } 1.212 + 1.213 + $bit_offset = ceil($bit_offset / 8) * 8; 1.214 + 1.215 + $info_aac_program_configs_i['comment_field_bytes'] = bindec(substr($aac_header_bitstream, $bit_offset, 8)); 1.216 + $bit_offset += 8; 1.217 + 1.218 + $info_aac_program_configs_i['comment_field'] = getid3_aac_adif::Bin2String(substr($aac_header_bitstream, $bit_offset, 8 * $info_aac_program_configs_i['comment_field_bytes'])); 1.219 + $bit_offset += 8 * $info_aac_program_configs_i['comment_field_bytes']; 1.220 + 1.221 + $info_aac_header['profile_text'] = getid3_aac_adif::AACprofileLookup($info_aac_program_configs_i['object_type'], $info_aac_header['mpeg_version']); 1.222 + $info_aac_program_configs_i['sampling_frequency'] = $getid3->info['audio']['sample_rate'] = getid3_aac_adif::AACsampleRateLookup($info_aac_program_configs_i['sampling_frequency_index']); 1.223 + $getid3->info['audio']['channels'] = getid3_aac_adif::AACchannelCountCalculate($info_aac_program_configs_i); 1.224 + 1.225 + if ($info_aac_program_configs_i['comment_field']) { 1.226 + $info_aac['comments'][] = $info_aac_program_configs_i['comment_field']; 1.227 + } 1.228 + } 1.229 + 1.230 + $getid3->info['playtime_seconds'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $getid3->info['audio']['bitrate']; 1.231 + $getid3->info['audio']['encoder_options'] = $info_aac['header_type'].' '.$info_aac_header['profile_text']; 1.232 + 1.233 + return true; 1.234 + } 1.235 + 1.236 + 1.237 + 1.238 + public static function Bin2String($bin_string) { 1.239 + // return 'hi' for input of '0110100001101001' 1.240 + $string = ''; 1.241 + $bin_string_reversed = strrev($bin_string); 1.242 + for ($i = 0; $i < strlen($bin_string_reversed); $i += 8) { 1.243 + $string = chr(bindec(strrev(substr($bin_string_reversed, $i, 8)))).$string; 1.244 + } 1.245 + return $string; 1.246 + } 1.247 + 1.248 + 1.249 + 1.250 + public static function AACsampleRateLookup($samplerate_id) { 1.251 + 1.252 + static $lookup = array ( 1.253 + 0 => 96000, 1.254 + 1 => 88200, 1.255 + 2 => 64000, 1.256 + 3 => 48000, 1.257 + 4 => 44100, 1.258 + 5 => 32000, 1.259 + 6 => 24000, 1.260 + 7 => 22050, 1.261 + 8 => 16000, 1.262 + 9 => 12000, 1.263 + 10 => 11025, 1.264 + 11 => 8000, 1.265 + 12 => 0, 1.266 + 13 => 0, 1.267 + 14 => 0, 1.268 + 15 => 0 1.269 + ); 1.270 + return (isset($lookup[$samplerate_id]) ? $lookup[$samplerate_id] : 'invalid'); 1.271 + } 1.272 + 1.273 + 1.274 + 1.275 + public static function AACprofileLookup($profile_id, $mpeg_version) { 1.276 + 1.277 + static $lookup = array ( 1.278 + 2 => array ( 1.279 + 0 => 'Main profile', 1.280 + 1 => 'Low Complexity profile (LC)', 1.281 + 2 => 'Scalable Sample Rate profile (SSR)', 1.282 + 3 => '(reserved)' 1.283 + ), 1.284 + 4 => array ( 1.285 + 0 => 'AAC_MAIN', 1.286 + 1 => 'AAC_LC', 1.287 + 2 => 'AAC_SSR', 1.288 + 3 => 'AAC_LTP' 1.289 + ) 1.290 + ); 1.291 + return (isset($lookup[$mpeg_version][$profile_id]) ? $lookup[$mpeg_version][$profile_id] : 'invalid'); 1.292 + } 1.293 + 1.294 + 1.295 + 1.296 + public static function AACchannelCountCalculate($program_configs) { 1.297 + 1.298 + $channels = 0; 1.299 + 1.300 + foreach (array ('front', 'side', 'back') as $placement) { 1.301 + for ($i = 0; $i < $program_configs['num_'.$placement.'_channel_elements']; $i++) { 1.302 + 1.303 + // Each element is channel pair (CPE = Channel Pair Element) 1.304 + $channels += 1 + ($program_configs[$placement.'_element_is_cpe'][$i] ? 1 : 0); 1.305 + } 1.306 + } 1.307 + 1.308 + return $channels + $program_configs['num_lfe_channel_elements']; 1.309 + } 1.310 + 1.311 +} 1.312 + 1.313 + 1.314 +?> 1.315 \ No newline at end of file