1 | <?php |
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2 | ///////////////////////////////////////////////////////////////// |
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3 | /// getID3() by James Heinrich <info@getid3.org> // |
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4 | // available at http://getid3.sourceforge.net // |
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5 | // or http://www.getid3.org // |
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6 | // // |
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7 | // FLV module by Seth Kaufman <sethØwhirl-i-gig*com> // |
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8 | // // |
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9 | // * version 0.1 (26 June 2005) // |
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10 | // // |
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11 | // // |
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12 | // * version 0.1.1 (15 July 2005) // |
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13 | // minor modifications by James Heinrich <info@getid3.org> // |
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14 | // // |
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15 | // * version 0.2 (22 February 2006) // |
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16 | // Support for On2 VP6 codec and meta information // |
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17 | // by Steve Webster <steve.websterØfeaturecreep*com> // |
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18 | // // |
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19 | // * version 0.3 (15 June 2006) // |
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20 | // Modified to not read entire file into memory // |
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21 | // by James Heinrich <info@getid3.org> // |
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22 | // // |
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23 | // * version 0.4 (07 December 2007) // |
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24 | // Bugfixes for incorrectly parsed FLV dimensions // |
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25 | // and incorrect parsing of onMetaTag // |
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26 | // by Evgeny Moysevich <moysevichØgmail*com> // |
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27 | // // |
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28 | // * version 0.5 (21 May 2009) // |
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29 | // Fixed parsing of audio tags and added additional codec // |
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30 | // details. The duration is now read from onMetaTag (if // |
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31 | // exists), rather than parsing whole file // |
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32 | // by Nigel Barnes <ngbarnesØhotmail*com> // |
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33 | // // |
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34 | // * version 0.6 (24 May 2009) // |
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35 | // Better parsing of files with h264 video // |
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36 | // by Evgeny Moysevich <moysevichØgmail*com> // |
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37 | // // |
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38 | // * version 0.6.1 (30 May 2011) // |
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39 | // prevent infinite loops in expGolombUe() // |
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40 | // // |
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41 | ///////////////////////////////////////////////////////////////// |
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42 | // // |
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43 | // module.audio-video.flv.php // |
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44 | // module for analyzing Shockwave Flash Video files // |
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45 | // dependencies: NONE // |
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46 | // /// |
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47 | ///////////////////////////////////////////////////////////////// |
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48 | |
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49 | define('GETID3_FLV_TAG_AUDIO', 8); |
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50 | define('GETID3_FLV_TAG_VIDEO', 9); |
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51 | define('GETID3_FLV_TAG_META', 18); |
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52 | |
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53 | define('GETID3_FLV_VIDEO_H263', 2); |
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54 | define('GETID3_FLV_VIDEO_SCREEN', 3); |
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55 | define('GETID3_FLV_VIDEO_VP6FLV', 4); |
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56 | define('GETID3_FLV_VIDEO_VP6FLV_ALPHA', 5); |
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57 | define('GETID3_FLV_VIDEO_SCREENV2', 6); |
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58 | define('GETID3_FLV_VIDEO_H264', 7); |
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59 | |
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60 | define('H264_AVC_SEQUENCE_HEADER', 0); |
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61 | define('H264_PROFILE_BASELINE', 66); |
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62 | define('H264_PROFILE_MAIN', 77); |
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63 | define('H264_PROFILE_EXTENDED', 88); |
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64 | define('H264_PROFILE_HIGH', 100); |
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65 | define('H264_PROFILE_HIGH10', 110); |
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66 | define('H264_PROFILE_HIGH422', 122); |
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67 | define('H264_PROFILE_HIGH444', 144); |
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68 | define('H264_PROFILE_HIGH444_PREDICTIVE', 244); |
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69 | |
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70 | class getid3_flv extends getid3_handler |
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71 | { |
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72 | public $max_frames = 100000; // break out of the loop if too many frames have been scanned; only scan this many if meta frame does not contain useful duration |
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73 | |
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74 | public function Analyze() { |
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75 | $info = &$this->getid3->info; |
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76 | |
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77 | fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET); |
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78 | |
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79 | $FLVdataLength = $info['avdataend'] - $info['avdataoffset']; |
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80 | $FLVheader = fread($this->getid3->fp, 5); |
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81 | |
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82 | $info['fileformat'] = 'flv'; |
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83 | $info['flv']['header']['signature'] = substr($FLVheader, 0, 3); |
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84 | $info['flv']['header']['version'] = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1)); |
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85 | $TypeFlags = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1)); |
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86 | |
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87 | $magic = 'FLV'; |
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88 | if ($info['flv']['header']['signature'] != $magic) { |
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89 | $info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"'; |
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90 | unset($info['flv']); |
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91 | unset($info['fileformat']); |
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92 | return false; |
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93 | } |
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94 | |
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95 | $info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04); |
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96 | $info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01); |
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97 | |
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98 | $FrameSizeDataLength = getid3_lib::BigEndian2Int(fread($this->getid3->fp, 4)); |
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99 | $FLVheaderFrameLength = 9; |
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100 | if ($FrameSizeDataLength > $FLVheaderFrameLength) { |
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101 | fseek($this->getid3->fp, $FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR); |
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102 | } |
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103 | $Duration = 0; |
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104 | $found_video = false; |
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105 | $found_audio = false; |
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106 | $found_meta = false; |
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107 | $found_valid_meta_playtime = false; |
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108 | $tagParseCount = 0; |
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109 | $info['flv']['framecount'] = array('total'=>0, 'audio'=>0, 'video'=>0); |
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110 | $flv_framecount = &$info['flv']['framecount']; |
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111 | while (((ftell($this->getid3->fp) + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime)) { |
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112 | $ThisTagHeader = fread($this->getid3->fp, 16); |
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113 | |
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114 | $PreviousTagLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 0, 4)); |
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115 | $TagType = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 4, 1)); |
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116 | $DataLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 5, 3)); |
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117 | $Timestamp = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 8, 3)); |
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118 | $LastHeaderByte = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 15, 1)); |
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119 | $NextOffset = ftell($this->getid3->fp) - 1 + $DataLength; |
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120 | if ($Timestamp > $Duration) { |
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121 | $Duration = $Timestamp; |
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122 | } |
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123 | |
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124 | $flv_framecount['total']++; |
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125 | switch ($TagType) { |
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126 | case GETID3_FLV_TAG_AUDIO: |
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127 | $flv_framecount['audio']++; |
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128 | if (!$found_audio) { |
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129 | $found_audio = true; |
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130 | $info['flv']['audio']['audioFormat'] = ($LastHeaderByte >> 4) & 0x0F; |
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131 | $info['flv']['audio']['audioRate'] = ($LastHeaderByte >> 2) & 0x03; |
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132 | $info['flv']['audio']['audioSampleSize'] = ($LastHeaderByte >> 1) & 0x01; |
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133 | $info['flv']['audio']['audioType'] = $LastHeaderByte & 0x01; |
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134 | } |
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135 | break; |
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136 | |
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137 | case GETID3_FLV_TAG_VIDEO: |
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138 | $flv_framecount['video']++; |
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139 | if (!$found_video) { |
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140 | $found_video = true; |
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141 | $info['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07; |
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142 | |
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143 | $FLVvideoHeader = fread($this->getid3->fp, 11); |
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144 | |
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145 | if ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H264) { |
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146 | // this code block contributed by: moysevichØgmail*com |
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147 | |
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148 | $AVCPacketType = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 0, 1)); |
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149 | if ($AVCPacketType == H264_AVC_SEQUENCE_HEADER) { |
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150 | // read AVCDecoderConfigurationRecord |
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151 | $configurationVersion = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 1)); |
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152 | $AVCProfileIndication = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 1)); |
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153 | $profile_compatibility = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 1)); |
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154 | $lengthSizeMinusOne = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 1)); |
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155 | $numOfSequenceParameterSets = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 8, 1)); |
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156 | |
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157 | if (($numOfSequenceParameterSets & 0x1F) != 0) { |
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158 | // there is at least one SequenceParameterSet |
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159 | // read size of the first SequenceParameterSet |
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160 | //$spsSize = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 9, 2)); |
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161 | $spsSize = getid3_lib::LittleEndian2Int(substr($FLVvideoHeader, 9, 2)); |
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162 | // read the first SequenceParameterSet |
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163 | $sps = fread($this->getid3->fp, $spsSize); |
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164 | if (strlen($sps) == $spsSize) { // make sure that whole SequenceParameterSet was red |
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165 | $spsReader = new AVCSequenceParameterSetReader($sps); |
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166 | $spsReader->readData(); |
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167 | $info['video']['resolution_x'] = $spsReader->getWidth(); |
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168 | $info['video']['resolution_y'] = $spsReader->getHeight(); |
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169 | } |
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170 | } |
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171 | } |
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172 | // end: moysevichØgmail*com |
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173 | |
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174 | } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H263) { |
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175 | |
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176 | $PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7; |
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177 | $PictureSizeType = $PictureSizeType & 0x0007; |
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178 | $info['flv']['header']['videoSizeType'] = $PictureSizeType; |
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179 | switch ($PictureSizeType) { |
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180 | case 0: |
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181 | //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)); |
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182 | //$PictureSizeEnc <<= 1; |
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183 | //$info['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8; |
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184 | //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2)); |
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185 | //$PictureSizeEnc <<= 1; |
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186 | //$info['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8; |
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187 | |
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188 | $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 2)); |
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189 | $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)); |
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190 | $PictureSizeEnc['x'] >>= 7; |
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191 | $PictureSizeEnc['y'] >>= 7; |
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192 | $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFF; |
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193 | $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFF; |
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194 | break; |
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195 | |
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196 | case 1: |
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197 | $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 3)); |
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198 | $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3)); |
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199 | $PictureSizeEnc['x'] >>= 7; |
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200 | $PictureSizeEnc['y'] >>= 7; |
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201 | $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFFFF; |
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202 | $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFFFF; |
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203 | break; |
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204 | |
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205 | case 2: |
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206 | $info['video']['resolution_x'] = 352; |
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207 | $info['video']['resolution_y'] = 288; |
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208 | break; |
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209 | |
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210 | case 3: |
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211 | $info['video']['resolution_x'] = 176; |
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212 | $info['video']['resolution_y'] = 144; |
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213 | break; |
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214 | |
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215 | case 4: |
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216 | $info['video']['resolution_x'] = 128; |
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217 | $info['video']['resolution_y'] = 96; |
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218 | break; |
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219 | |
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220 | case 5: |
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221 | $info['video']['resolution_x'] = 320; |
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222 | $info['video']['resolution_y'] = 240; |
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223 | break; |
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224 | |
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225 | case 6: |
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226 | $info['video']['resolution_x'] = 160; |
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227 | $info['video']['resolution_y'] = 120; |
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228 | break; |
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229 | |
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230 | default: |
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231 | $info['video']['resolution_x'] = 0; |
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232 | $info['video']['resolution_y'] = 0; |
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233 | break; |
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234 | |
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235 | } |
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236 | } |
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237 | $info['video']['pixel_aspect_ratio'] = $info['video']['resolution_x'] / $info['video']['resolution_y']; |
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238 | } |
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239 | break; |
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240 | |
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241 | // Meta tag |
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242 | case GETID3_FLV_TAG_META: |
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243 | if (!$found_meta) { |
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244 | $found_meta = true; |
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245 | fseek($this->getid3->fp, -1, SEEK_CUR); |
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246 | $datachunk = fread($this->getid3->fp, $DataLength); |
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247 | $AMFstream = new AMFStream($datachunk); |
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248 | $reader = new AMFReader($AMFstream); |
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249 | $eventName = $reader->readData(); |
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250 | $info['flv']['meta'][$eventName] = $reader->readData(); |
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251 | unset($reader); |
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252 | |
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253 | $copykeys = array('framerate'=>'frame_rate', 'width'=>'resolution_x', 'height'=>'resolution_y', 'audiodatarate'=>'bitrate', 'videodatarate'=>'bitrate'); |
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254 | foreach ($copykeys as $sourcekey => $destkey) { |
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255 | if (isset($info['flv']['meta']['onMetaData'][$sourcekey])) { |
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256 | switch ($sourcekey) { |
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257 | case 'width': |
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258 | case 'height': |
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259 | $info['video'][$destkey] = intval(round($info['flv']['meta']['onMetaData'][$sourcekey])); |
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260 | break; |
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261 | case 'audiodatarate': |
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262 | $info['audio'][$destkey] = getid3_lib::CastAsInt(round($info['flv']['meta']['onMetaData'][$sourcekey] * 1000)); |
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263 | break; |
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264 | case 'videodatarate': |
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265 | case 'frame_rate': |
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266 | default: |
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267 | $info['video'][$destkey] = $info['flv']['meta']['onMetaData'][$sourcekey]; |
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268 | break; |
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269 | } |
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270 | } |
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271 | } |
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272 | if (!empty($info['flv']['meta']['onMetaData']['duration'])) { |
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273 | $found_valid_meta_playtime = true; |
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274 | } |
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275 | } |
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276 | break; |
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277 | |
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278 | default: |
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279 | // noop |
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280 | break; |
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281 | } |
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282 | fseek($this->getid3->fp, $NextOffset, SEEK_SET); |
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283 | } |
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284 | |
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285 | $info['playtime_seconds'] = $Duration / 1000; |
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286 | if ($info['playtime_seconds'] > 0) { |
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287 | $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds']; |
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288 | } |
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289 | |
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290 | if ($info['flv']['header']['hasAudio']) { |
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291 | $info['audio']['codec'] = $this->FLVaudioFormat($info['flv']['audio']['audioFormat']); |
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292 | $info['audio']['sample_rate'] = $this->FLVaudioRate($info['flv']['audio']['audioRate']); |
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293 | $info['audio']['bits_per_sample'] = $this->FLVaudioBitDepth($info['flv']['audio']['audioSampleSize']); |
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294 | |
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295 | $info['audio']['channels'] = $info['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo |
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296 | $info['audio']['lossless'] = ($info['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed |
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297 | $info['audio']['dataformat'] = 'flv'; |
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298 | } |
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299 | if (!empty($info['flv']['header']['hasVideo'])) { |
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300 | $info['video']['codec'] = $this->FLVvideoCodec($info['flv']['video']['videoCodec']); |
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301 | $info['video']['dataformat'] = 'flv'; |
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302 | $info['video']['lossless'] = false; |
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303 | } |
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304 | |
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305 | // Set information from meta |
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306 | if (!empty($info['flv']['meta']['onMetaData']['duration'])) { |
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307 | $info['playtime_seconds'] = $info['flv']['meta']['onMetaData']['duration']; |
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308 | $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds']; |
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309 | } |
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310 | if (isset($info['flv']['meta']['onMetaData']['audiocodecid'])) { |
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311 | $info['audio']['codec'] = $this->FLVaudioFormat($info['flv']['meta']['onMetaData']['audiocodecid']); |
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312 | } |
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313 | if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) { |
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314 | $info['video']['codec'] = $this->FLVvideoCodec($info['flv']['meta']['onMetaData']['videocodecid']); |
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315 | } |
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316 | return true; |
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317 | } |
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318 | |
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319 | |
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320 | public function FLVaudioFormat($id) { |
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321 | $FLVaudioFormat = array( |
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322 | 0 => 'Linear PCM, platform endian', |
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323 | 1 => 'ADPCM', |
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324 | 2 => 'mp3', |
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325 | 3 => 'Linear PCM, little endian', |
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326 | 4 => 'Nellymoser 16kHz mono', |
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327 | 5 => 'Nellymoser 8kHz mono', |
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328 | 6 => 'Nellymoser', |
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329 | 7 => 'G.711A-law logarithmic PCM', |
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330 | 8 => 'G.711 mu-law logarithmic PCM', |
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331 | 9 => 'reserved', |
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332 | 10 => 'AAC', |
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333 | 11 => false, // unknown? |
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334 | 12 => false, // unknown? |
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335 | 13 => false, // unknown? |
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336 | 14 => 'mp3 8kHz', |
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337 | 15 => 'Device-specific sound', |
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338 | ); |
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339 | return (isset($FLVaudioFormat[$id]) ? $FLVaudioFormat[$id] : false); |
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340 | } |
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341 | |
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342 | public function FLVaudioRate($id) { |
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343 | $FLVaudioRate = array( |
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344 | 0 => 5500, |
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345 | 1 => 11025, |
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346 | 2 => 22050, |
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347 | 3 => 44100, |
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348 | ); |
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349 | return (isset($FLVaudioRate[$id]) ? $FLVaudioRate[$id] : false); |
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350 | } |
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351 | |
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352 | public function FLVaudioBitDepth($id) { |
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353 | $FLVaudioBitDepth = array( |
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354 | 0 => 8, |
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355 | 1 => 16, |
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356 | ); |
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357 | return (isset($FLVaudioBitDepth[$id]) ? $FLVaudioBitDepth[$id] : false); |
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358 | } |
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359 | |
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360 | public function FLVvideoCodec($id) { |
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361 | $FLVvideoCodec = array( |
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362 | GETID3_FLV_VIDEO_H263 => 'Sorenson H.263', |
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363 | GETID3_FLV_VIDEO_SCREEN => 'Screen video', |
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364 | GETID3_FLV_VIDEO_VP6FLV => 'On2 VP6', |
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365 | GETID3_FLV_VIDEO_VP6FLV_ALPHA => 'On2 VP6 with alpha channel', |
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366 | GETID3_FLV_VIDEO_SCREENV2 => 'Screen video v2', |
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367 | GETID3_FLV_VIDEO_H264 => 'Sorenson H.264', |
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368 | ); |
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369 | return (isset($FLVvideoCodec[$id]) ? $FLVvideoCodec[$id] : false); |
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370 | } |
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371 | } |
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372 | |
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373 | class AMFStream { |
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374 | public $bytes; |
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375 | public $pos; |
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376 | |
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377 | public function AMFStream(&$bytes) { |
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378 | $this->bytes =& $bytes; |
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379 | $this->pos = 0; |
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380 | } |
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381 | |
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382 | public function readByte() { |
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383 | return getid3_lib::BigEndian2Int(substr($this->bytes, $this->pos++, 1)); |
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384 | } |
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385 | |
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386 | public function readInt() { |
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387 | return ($this->readByte() << 8) + $this->readByte(); |
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388 | } |
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389 | |
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390 | public function readLong() { |
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391 | return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte(); |
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392 | } |
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393 | |
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394 | public function readDouble() { |
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395 | return getid3_lib::BigEndian2Float($this->read(8)); |
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396 | } |
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397 | |
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398 | public function readUTF() { |
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399 | $length = $this->readInt(); |
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400 | return $this->read($length); |
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401 | } |
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402 | |
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403 | public function readLongUTF() { |
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404 | $length = $this->readLong(); |
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405 | return $this->read($length); |
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406 | } |
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407 | |
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408 | public function read($length) { |
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409 | $val = substr($this->bytes, $this->pos, $length); |
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410 | $this->pos += $length; |
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411 | return $val; |
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412 | } |
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413 | |
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414 | public function peekByte() { |
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415 | $pos = $this->pos; |
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416 | $val = $this->readByte(); |
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417 | $this->pos = $pos; |
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418 | return $val; |
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419 | } |
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420 | |
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421 | public function peekInt() { |
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422 | $pos = $this->pos; |
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423 | $val = $this->readInt(); |
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424 | $this->pos = $pos; |
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425 | return $val; |
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426 | } |
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427 | |
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428 | public function peekLong() { |
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429 | $pos = $this->pos; |
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430 | $val = $this->readLong(); |
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431 | $this->pos = $pos; |
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432 | return $val; |
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433 | } |
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434 | |
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435 | public function peekDouble() { |
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436 | $pos = $this->pos; |
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437 | $val = $this->readDouble(); |
---|
438 | $this->pos = $pos; |
---|
439 | return $val; |
---|
440 | } |
---|
441 | |
---|
442 | public function peekUTF() { |
---|
443 | $pos = $this->pos; |
---|
444 | $val = $this->readUTF(); |
---|
445 | $this->pos = $pos; |
---|
446 | return $val; |
---|
447 | } |
---|
448 | |
---|
449 | public function peekLongUTF() { |
---|
450 | $pos = $this->pos; |
---|
451 | $val = $this->readLongUTF(); |
---|
452 | $this->pos = $pos; |
---|
453 | return $val; |
---|
454 | } |
---|
455 | } |
---|
456 | |
---|
457 | class AMFReader { |
---|
458 | public $stream; |
---|
459 | |
---|
460 | public function AMFReader(&$stream) { |
---|
461 | $this->stream =& $stream; |
---|
462 | } |
---|
463 | |
---|
464 | public function readData() { |
---|
465 | $value = null; |
---|
466 | |
---|
467 | $type = $this->stream->readByte(); |
---|
468 | switch ($type) { |
---|
469 | |
---|
470 | // Double |
---|
471 | case 0: |
---|
472 | $value = $this->readDouble(); |
---|
473 | break; |
---|
474 | |
---|
475 | // Boolean |
---|
476 | case 1: |
---|
477 | $value = $this->readBoolean(); |
---|
478 | break; |
---|
479 | |
---|
480 | // String |
---|
481 | case 2: |
---|
482 | $value = $this->readString(); |
---|
483 | break; |
---|
484 | |
---|
485 | // Object |
---|
486 | case 3: |
---|
487 | $value = $this->readObject(); |
---|
488 | break; |
---|
489 | |
---|
490 | // null |
---|
491 | case 6: |
---|
492 | return null; |
---|
493 | break; |
---|
494 | |
---|
495 | // Mixed array |
---|
496 | case 8: |
---|
497 | $value = $this->readMixedArray(); |
---|
498 | break; |
---|
499 | |
---|
500 | // Array |
---|
501 | case 10: |
---|
502 | $value = $this->readArray(); |
---|
503 | break; |
---|
504 | |
---|
505 | // Date |
---|
506 | case 11: |
---|
507 | $value = $this->readDate(); |
---|
508 | break; |
---|
509 | |
---|
510 | // Long string |
---|
511 | case 13: |
---|
512 | $value = $this->readLongString(); |
---|
513 | break; |
---|
514 | |
---|
515 | // XML (handled as string) |
---|
516 | case 15: |
---|
517 | $value = $this->readXML(); |
---|
518 | break; |
---|
519 | |
---|
520 | // Typed object (handled as object) |
---|
521 | case 16: |
---|
522 | $value = $this->readTypedObject(); |
---|
523 | break; |
---|
524 | |
---|
525 | // Long string |
---|
526 | default: |
---|
527 | $value = '(unknown or unsupported data type)'; |
---|
528 | break; |
---|
529 | } |
---|
530 | |
---|
531 | return $value; |
---|
532 | } |
---|
533 | |
---|
534 | public function readDouble() { |
---|
535 | return $this->stream->readDouble(); |
---|
536 | } |
---|
537 | |
---|
538 | public function readBoolean() { |
---|
539 | return $this->stream->readByte() == 1; |
---|
540 | } |
---|
541 | |
---|
542 | public function readString() { |
---|
543 | return $this->stream->readUTF(); |
---|
544 | } |
---|
545 | |
---|
546 | public function readObject() { |
---|
547 | // Get highest numerical index - ignored |
---|
548 | // $highestIndex = $this->stream->readLong(); |
---|
549 | |
---|
550 | $data = array(); |
---|
551 | |
---|
552 | while ($key = $this->stream->readUTF()) { |
---|
553 | $data[$key] = $this->readData(); |
---|
554 | } |
---|
555 | // Mixed array record ends with empty string (0x00 0x00) and 0x09 |
---|
556 | if (($key == '') && ($this->stream->peekByte() == 0x09)) { |
---|
557 | // Consume byte |
---|
558 | $this->stream->readByte(); |
---|
559 | } |
---|
560 | return $data; |
---|
561 | } |
---|
562 | |
---|
563 | public function readMixedArray() { |
---|
564 | // Get highest numerical index - ignored |
---|
565 | $highestIndex = $this->stream->readLong(); |
---|
566 | |
---|
567 | $data = array(); |
---|
568 | |
---|
569 | while ($key = $this->stream->readUTF()) { |
---|
570 | if (is_numeric($key)) { |
---|
571 | $key = (float) $key; |
---|
572 | } |
---|
573 | $data[$key] = $this->readData(); |
---|
574 | } |
---|
575 | // Mixed array record ends with empty string (0x00 0x00) and 0x09 |
---|
576 | if (($key == '') && ($this->stream->peekByte() == 0x09)) { |
---|
577 | // Consume byte |
---|
578 | $this->stream->readByte(); |
---|
579 | } |
---|
580 | |
---|
581 | return $data; |
---|
582 | } |
---|
583 | |
---|
584 | public function readArray() { |
---|
585 | $length = $this->stream->readLong(); |
---|
586 | $data = array(); |
---|
587 | |
---|
588 | for ($i = 0; $i < $length; $i++) { |
---|
589 | $data[] = $this->readData(); |
---|
590 | } |
---|
591 | return $data; |
---|
592 | } |
---|
593 | |
---|
594 | public function readDate() { |
---|
595 | $timestamp = $this->stream->readDouble(); |
---|
596 | $timezone = $this->stream->readInt(); |
---|
597 | return $timestamp; |
---|
598 | } |
---|
599 | |
---|
600 | public function readLongString() { |
---|
601 | return $this->stream->readLongUTF(); |
---|
602 | } |
---|
603 | |
---|
604 | public function readXML() { |
---|
605 | return $this->stream->readLongUTF(); |
---|
606 | } |
---|
607 | |
---|
608 | public function readTypedObject() { |
---|
609 | $className = $this->stream->readUTF(); |
---|
610 | return $this->readObject(); |
---|
611 | } |
---|
612 | } |
---|
613 | |
---|
614 | class AVCSequenceParameterSetReader { |
---|
615 | public $sps; |
---|
616 | public $start = 0; |
---|
617 | public $currentBytes = 0; |
---|
618 | public $currentBits = 0; |
---|
619 | public $width; |
---|
620 | public $height; |
---|
621 | |
---|
622 | public function AVCSequenceParameterSetReader($sps) { |
---|
623 | $this->sps = $sps; |
---|
624 | } |
---|
625 | |
---|
626 | public function readData() { |
---|
627 | $this->skipBits(8); |
---|
628 | $this->skipBits(8); |
---|
629 | $profile = $this->getBits(8); // read profile |
---|
630 | $this->skipBits(16); |
---|
631 | $this->expGolombUe(); // read sps id |
---|
632 | if (in_array($profile, array(H264_PROFILE_HIGH, H264_PROFILE_HIGH10, H264_PROFILE_HIGH422, H264_PROFILE_HIGH444, H264_PROFILE_HIGH444_PREDICTIVE))) { |
---|
633 | if ($this->expGolombUe() == 3) { |
---|
634 | $this->skipBits(1); |
---|
635 | } |
---|
636 | $this->expGolombUe(); |
---|
637 | $this->expGolombUe(); |
---|
638 | $this->skipBits(1); |
---|
639 | if ($this->getBit()) { |
---|
640 | for ($i = 0; $i < 8; $i++) { |
---|
641 | if ($this->getBit()) { |
---|
642 | $size = $i < 6 ? 16 : 64; |
---|
643 | $lastScale = 8; |
---|
644 | $nextScale = 8; |
---|
645 | for ($j = 0; $j < $size; $j++) { |
---|
646 | if ($nextScale != 0) { |
---|
647 | $deltaScale = $this->expGolombUe(); |
---|
648 | $nextScale = ($lastScale + $deltaScale + 256) % 256; |
---|
649 | } |
---|
650 | if ($nextScale != 0) { |
---|
651 | $lastScale = $nextScale; |
---|
652 | } |
---|
653 | } |
---|
654 | } |
---|
655 | } |
---|
656 | } |
---|
657 | } |
---|
658 | $this->expGolombUe(); |
---|
659 | $pocType = $this->expGolombUe(); |
---|
660 | if ($pocType == 0) { |
---|
661 | $this->expGolombUe(); |
---|
662 | } elseif ($pocType == 1) { |
---|
663 | $this->skipBits(1); |
---|
664 | $this->expGolombSe(); |
---|
665 | $this->expGolombSe(); |
---|
666 | $pocCycleLength = $this->expGolombUe(); |
---|
667 | for ($i = 0; $i < $pocCycleLength; $i++) { |
---|
668 | $this->expGolombSe(); |
---|
669 | } |
---|
670 | } |
---|
671 | $this->expGolombUe(); |
---|
672 | $this->skipBits(1); |
---|
673 | $this->width = ($this->expGolombUe() + 1) * 16; |
---|
674 | $heightMap = $this->expGolombUe() + 1; |
---|
675 | $this->height = (2 - $this->getBit()) * $heightMap * 16; |
---|
676 | } |
---|
677 | |
---|
678 | public function skipBits($bits) { |
---|
679 | $newBits = $this->currentBits + $bits; |
---|
680 | $this->currentBytes += (int)floor($newBits / 8); |
---|
681 | $this->currentBits = $newBits % 8; |
---|
682 | } |
---|
683 | |
---|
684 | public function getBit() { |
---|
685 | $result = (getid3_lib::BigEndian2Int(substr($this->sps, $this->currentBytes, 1)) >> (7 - $this->currentBits)) & 0x01; |
---|
686 | $this->skipBits(1); |
---|
687 | return $result; |
---|
688 | } |
---|
689 | |
---|
690 | public function getBits($bits) { |
---|
691 | $result = 0; |
---|
692 | for ($i = 0; $i < $bits; $i++) { |
---|
693 | $result = ($result << 1) + $this->getBit(); |
---|
694 | } |
---|
695 | return $result; |
---|
696 | } |
---|
697 | |
---|
698 | public function expGolombUe() { |
---|
699 | $significantBits = 0; |
---|
700 | $bit = $this->getBit(); |
---|
701 | while ($bit == 0) { |
---|
702 | $significantBits++; |
---|
703 | $bit = $this->getBit(); |
---|
704 | |
---|
705 | if ($significantBits > 31) { |
---|
706 | // something is broken, this is an emergency escape to prevent infinite loops |
---|
707 | return 0; |
---|
708 | } |
---|
709 | } |
---|
710 | return (1 << $significantBits) + $this->getBits($significantBits) - 1; |
---|
711 | } |
---|
712 | |
---|
713 | public function expGolombSe() { |
---|
714 | $result = $this->expGolombUe(); |
---|
715 | if (($result & 0x01) == 0) { |
---|
716 | return -($result >> 1); |
---|
717 | } else { |
---|
718 | return ($result + 1) >> 1; |
---|
719 | } |
---|
720 | } |
---|
721 | |
---|
722 | public function getWidth() { |
---|
723 | return $this->width; |
---|
724 | } |
---|
725 | |
---|
726 | public function getHeight() { |
---|
727 | return $this->height; |
---|
728 | } |
---|
729 | } |
---|