<?php
date_default_timezone_set('Asia/Shanghai');
$id = isset($_GET['id']) ? $_GET['id'] : 'cctv1';
$n = [
    'cctv1' => ['2024078201', '600001859', 'fhd'], //CCTV-1高清
    'cctv2' => ['2024075401', '600001800', 'fhd'], //CCTV-2高清
    'cctv3' => ['2024068501', '600001801', 'fhd'], //CCTV-3高清
    'cctv4' => ['2029797101', '600001814', 'fhd'], //CCTV-4高清
    'cctv5' => ['2024078401', '600001818', 'fhd'], //CCTV-5高清
    'cctv5p' => ['2024078001', '600001817', 'fhd'], //CCTV-5+高清
    'cctv6' => ['2013693901', '600108442', 'fhd'], //CCTV-6高清
    'cctv7' => ['2024072001', '600004092', 'fhd'], //CCTV-7高清
    'cctv8' => ['2029793001', '600001803', 'fhd'], //CCTV-8高清
    'cctv9' => ['2024078601', '600004078', 'fhd'], //CCTV-9高清
    'cctv10' => ['2024078701', '600001805', 'fhd'], //CCTV-10高清
    'cctv11' => ['2027248701', '600001806', 'fhd'], //CCTV-11高清
    'cctv12' => ['2027248801', '600001807', 'fhd'], //CCTV-12高清
    'cctv13' => ['2029797201', '600001811', 'fhd'], //CCTV-13高清
    'cctv14' => ['2027248901', '600001809', 'fhd'], //CCTV-14高清
    'cctv15' => ['2027249001', '600001815', 'fhd'], //CCTV-15高清
    'cctv16' => ['2027249101', '600098637', 'fhd'], //CCTV-16高清
    'cctv164k' => ['2027249301', '600099502', 'fhd'], //CCTV-16(4K)
    'cctv17' => ['2027249401', '600001810', 'fhd'], //CCTV-17高清
    'cctv4k' => ['2029810301', '600002264', 'fhd'], //CCTV-4K
    'cctv8k' => ['2026774101', '600156816', 'fhd'], //CCTV-8K
    'cgtn' => ['2024181701', '600014550', 'fhd'], //CGTN
    'cgtnfy' => ['2024181801', '600084704', 'fhd'], //CGTN法语频道
    'cgtney' => ['2024181901', '600084758', 'fhd'], //CGTN俄语频道
    'cgtnalby' => ['2024182001', '600084782', 'fhd'], //CGTN阿拉伯语频道
    'cgtnxby' => ['2024182101', '600084744', 'fhd'], //CGTN西班牙语频道
    'cgtnwyjl' => ['2024182301', '600084781', 'fhd'], //CGTN外语纪录频道
    'cctvfyjc' => ['2025637103', '600099658', 'shd'], //CCTV风云剧场频道
    'cctvdyjc' => ['2026874203', '600099655', 'shd'], //CCTV第一剧场频道
    'cctvhjjc' => ['2026874303', '600099620', 'shd'], //CCTV怀旧剧场频道
    'cctvsjdl' => ['2026874403', '600099637', 'shd'], //CCTV世界地理频道
    'cctvfyyy' => ['2026874503', '600099660', 'shd'], //CCTV风云音乐频道
    'cctvbqkj' => ['2026874603', '600099649', 'shd'], //CCTV兵器科技频道
    'cctvfyzq' => ['2026966203', '600099636', 'shd'], //CCTV风云足球频道
    'cctvgeqwq' => ['2026874703', '600099659', 'shd'], //CCTV高尔夫·网球频道
    'cctvnxss' => ['2026874803', '600099650', 'shd'], //CCTV女性时尚频道
    'cctvyswhjp' => ['2026874903', '600099653', 'shd'], //CCTV央视文化精品频道
    'cctvystq' => ['2026875003', '600099652', 'shd'], //CCTV央视台球频道
    'cctvdszn' => ['2026875103', '600099656', 'shd'], //CCTV电视指南频道
    'cctvwsjk' => ['2025637003', '600099651', 'shd'], //CCTV卫生健康频道
    'bjws' => ['2024052703', '600002309', 'fhd'], //北京卫视
    'jsws' => ['2024171103', '600002521', 'fhd'], //江苏卫视
    'dfws' => ['2024054503', '600002483', 'fhd'], //东方卫视
    'zjws' => ['2024054703', '600002520', 'fhd'], //浙江卫视
    'hnws' => ['2024054803', '600002475', 'fhd'], //湖南卫视
    'hbws' => ['2024171203', '600002508', 'fhd'], //湖北卫视
    'gdws' => ['2024060903', '600002485', 'fhd'], //广东卫视
    'gxws' => ['2024060703', '600002509', 'fhd'], //广西卫视
    'hljws' => ['2029797003', '600002498', 'fhd'], //黑龙江卫视
    'hnws2' => ['2024055603', '600002506', 'fhd'], //海南卫视
    'cqws' => ['2024061103', '600002531', 'fhd'], //重庆卫视
    'szws' => ['2024061303', '600002481', 'fhd'], //深圳卫视
    'scws' => ['2024061403', '600002516', 'fhd'], //四川卫视
    'henanws' => ['2029797303', '600002525', 'fhd'], //河南卫视
    'fjdnhz' => ['2024061503', '600002484', 'fhd'], //福建东南卫视
    'gzhws' => ['2024061603', '600002490', 'fhd'], //贵州卫视
    'jxws' => ['2024061703', '600002503', 'fhd'], //江西卫视
    'lnws' => ['2024171303', '600002505', 'fhd'], //辽宁卫视
    'ahws' => ['2024171403', '600002532', 'fhd'], //安徽卫视
    'hbws2' => ['2024171503', '600002493', 'fhd'], //河北卫视
    'sdws' => ['2029787903', '600002513', 'fhd'], //山东卫视
    'tjws' => ['2019927003', '600152137', 'fhd'], //天津卫视
    'jlws' => ['2025561503', '600190405', 'fhd'], //吉林卫视
    'shanxiws' => ['2029795103', '600190400', 'fhd'], //陕西卫视
    'nxws' => ['2025608503', '600190737', 'fhd'], //宁夏卫视
    'nmgws' => ['2025561203', '600190401', 'fhd'], //内蒙古卫视
    'ynws' => ['2025561303', '600190402', 'fhd'], //云南卫视
    'shanxiws2' => ['2025560803', '600190407', 'fhd'], //山西卫视
    'qhws' => ['2025559103', '600190406', 'fhd'], //青海卫视
    'xzws' => ['2025558003', '600190403', 'fhd'], //西藏卫视
    'cetv1' => ['2022823801', '600171827', 'fhd'], //中国教育电视台1频道
    'gxpd' => ['2029360403', '600213139', 'fhd'], //国学频道
    'xjws' => ['2019927403', '600152138', 'fhd'] //新疆卫视
];

class CKeyManager
{
    const DELTA = 0x9e3779b9;
    const ROUNDS = 16;
    const LOG_ROUNDS = 4;
    const SALT_LEN = 2;
    const ZERO_LEN = 7;
    const TEA_CKEY = '59b2f7cf725ef43c34fdd7c123411ed3';
    const GUARD_TEA_KEY = '110DBEC10C23E7D2E56A1CAD6914EF1B';
    
    private $xorKey = [0x84, 0x2E, 0xED, 0x08, 0xF0, 0x66, 0xE6, 0xEA, 0x48, 0xB4, 0xCA, 0xA9, 0x91, 0xED, 0x6F, 0xF3];
    private $guardXorKey = [0xB3, 0xC9, 0x53, 0xA0, 0x69, 0x13, 0xAD, 0x4D];
    private $standardAlphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
    private $customAlphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-=';
    private $guid = '';
    
    public function __construct()
    {
        date_default_timezone_set('Asia/Shanghai');
        $this->generateGuid();
    }
    
    private function generateGuid()
    {
        $this->guid = sprintf('%08s%04s%04s%04s%12s',
            dechex(mt_rand(0, 0xffffffff)),
            dechex(mt_rand(0, 0xffff)),
            dechex(mt_rand(0, 0xffff)),
            dechex(mt_rand(0, 0xffff)),
            dechex(mt_rand(0, 0xffffffffffff))
        );
        if (strlen($this->guid) !== 32) {
            $this->guid = str_pad($this->guid, 32, '0', STR_PAD_LEFT);
        }
        return $this->guid;
    }
    
    public function getGuid(){return $this->guid;}
    public function setGuid($guid){$this->guid = $guid;}
    public function resetGuid(){return $this->generateGuid();}

    private function randomHexStr($length){
        $hex='';for($i=0;$i<$length;$i++)$hex.=dechex(mt_rand(0,15));
        return strtoupper($hex);
    }

    private function spvcode($defn) {
        $height = 1080;
        if(preg_match('/(4k|8k|hdr)/i',$defn))$height=2160;
        $frame_rates=[30,60,90,120];
        $h264_parts=$h265_parts=[];
        foreach($frame_rates as $fps){
            $h264_parts[]="{$fps}:{$height}";
            $h265_parts[]="{$fps}:{$height}";
        }
        $h264_str=implode(',',$h264_parts);
        $h265_str=implode(',',$h265_parts);
        $spvcode_raw="H({$h264_str}|{$h264_str});2({$h265_str}|{$h265_str})";
        return base64_encode($spvcode_raw);
    }

    private function calcSignature($buffer){
        $signature=0;
        foreach($buffer as $byte){
            $signature=(0x83*$signature+($byte&0xFF))&0x7FFFFFFF;
        }
        return $signature;
    }
    
    private function customDecode($text){
        if(empty($text))return '';
        $text=rtrim($text,'=');
        if(strlen($text)%4!=0)$text.=str_repeat('=',4-(strlen($text)%4));
        $trans=[];
        $len=min(strlen($this->customAlphabet),strlen($this->standardAlphabet));
        for($i=0;$i<$len;$i++)$trans[$this->customAlphabet[$i]]=$this->standardAlphabet[$i];
        return base64_decode(strtr($text,$trans));
    }
    
    private function customEncode($text){
        $encoded=base64_encode($text);
        $trans=[];
        $len=min(strlen($this->standardAlphabet),strlen($this->customAlphabet));
        for($i=0;$i<$len;$i++)$trans[$this->standardAlphabet[$i]]=$this->customAlphabet[$i];
        return rtrim(strtr($encoded,$trans),'=');
    }

    private function xorArray($byteArray){
        $ret=[];$len=count($byteArray);
        for($i=0;$i<$len;$i++)$ret[]=$byteArray[$i]^$this->xorKey[$i&0xF];
        return $ret;
    }

    private function teaEncryptECB($pInBuf,$pKey){
        if(strlen($pInBuf)<8)$pInBuf=str_pad($pInBuf,8,"\0");
        $u=unpack('N2',$pInBuf);$y=$u[1];$z=$u[2];
        $k=[unpack('N',substr($pKey,0,4))[1],unpack('N',substr($pKey,4,4))[1],unpack('N',substr($pKey,8,4))[1],unpack('N',substr($pKey,12,4))[1]];
        $sum=0;
        for($i=0;$i<self::ROUNDS;$i++){
            $sum=($sum+self::DELTA)&0xFFFFFFFF;
            $y=($y + ((($z<<4)+$k[0]) ^ ($z+$sum) ^ (($z>>5)+$k[1]))) &0xFFFFFFFF;
            $z=($z + ((($y<<4)+$k[2]) ^ ($y+$sum) ^ (($y>>5)+$k[3]))) &0xFFFFFFFF;
        }
        return pack('N2',$y,$z);
    }

    private function teaDecryptECB($pInBuf,$pKey){
        $u=unpack('N2',$pInBuf);$y=$u[1];$z=$u[2];
        $k=[unpack('N',substr($pKey,0,4))[1],unpack('N',substr($pKey,4,4))[1],unpack('N',substr($pKey,8,4))[1],unpack('N',substr($pKey,12,4))[1]];
        $sum=(self::DELTA<<self::LOG_ROUNDS)&0xFFFFFFFF;
        for($i=0;$i<self::ROUNDS;$i++){
            $z=($z - ((($y<<4)+$k[2]) ^ ($y+$sum) ^ (($y>>5)+$k[3]))) &0xFFFFFFFF;
            $y=($y - ((($z<<4)+$k[0]) ^ ($z+$sum) ^ (($z>>5)+$k[1]))) &0xFFFFFFFF;
            $sum=($sum-self::DELTA)&0xFFFFFFFF;
        }
        return pack('N2',$y,$z);
    }

    private function oiSymmetryEncrypt2($pInBuf,$nInBufLen,$pKey){
        $nPadSaltBodyZeroLen=$nInBufLen+1+self::SALT_LEN+self::ZERO_LEN;
        $nPadlen=$nPadSaltBodyZeroLen%8;if($nPadlen)$nPadlen=8-$nPadlen;
        $pOutBuf='';
        $src_buf=array_fill(0,8,0);
        $src_buf[0]=(mt_rand(0,255)&0xF8)|$nPadlen;
        $src_i=1;
        while($nPadlen){$src_buf[$src_i]=mt_rand(0,255);$src_i++;$nPadlen--;}
        $iv_plain=array_fill(0,8,0);$iv_crypt=$iv_plain;
        $i=0;
        while($i<self::SALT_LEN){
            if($src_i<8){$src_buf[$src_i]=mt_rand(0,255);$src_i++;$i++;}
            if($src_i==8){
                for($j=0;$j<8;$j++)$src_buf[$j]^=$iv_crypt[$j];
                $temp_out=$this->teaEncryptECB(pack('C*',...$src_buf),$pKey);
                $temp_bytes=array_values(unpack('C*',$temp_out));
                for($j=0;$j<8;$j++)$temp_bytes[$j]^=$iv_plain[$j];
                $iv_plain=$src_buf;$iv_crypt=$temp_bytes;
                $pOutBuf.=pack('C*',...$temp_bytes);
                $src_i=0;
            }
        }
        $pInBufIndex=0;
        while($nInBufLen){
            if($src_i<8){$src_buf[$src_i]=ord($pInBuf[$pInBufIndex]);$pInBufIndex++;$src_i++;$nInBufLen--;}
            if($src_i==8){
                for($j=0;$j<8;$j++)$src_buf[$j]^=$iv_crypt[$j];
                $temp_out=$this->teaEncryptECB(pack('C*',...$src_buf),$pKey);
                $temp_bytes=array_values(unpack('C*',$temp_out));
                for($j=0;$j<8;$j++)$temp_bytes[$j]^=$iv_plain[$j];
                $iv_plain=$src_buf;$iv_crypt=$temp_bytes;
                $pOutBuf.=pack('C*',...$temp_bytes);
                $src_i=0;
            }
        }
        $i=0;
        while($i<self::ZERO_LEN){
            if($src_i<8){$src_buf[$src_i]=0;$src_i++;$i++;}
            if($src_i==8){
                for($j=0;$j<8;$j++)$src_buf[$j]^=$iv_crypt[$j];
                $temp_out=$this->teaEncryptECB(pack('C*',...$src_buf),$pKey);
                $temp_bytes=array_values(unpack('C*',$temp_out));
                for($j=0;$j<8;$j++)$temp_bytes[$j]^=$iv_plain[$j];
                $iv_plain=$src_buf;$iv_crypt=$temp_bytes;
                $pOutBuf.=pack('C*',...$temp_bytes);
                $src_i=0;
            }
        }
        if($src_i>0){
            for($j=$src_i;$j<8;$j++)$src_buf[$j]=0;
            for($j=0;$j<8;$j++)$src_buf[$j]^=$iv_crypt[$j];
            $temp_out=$this->teaEncryptECB(pack('C*',...$src_buf),$pKey);
            $temp_bytes=array_values(unpack('C*',$temp_out));
            for($j=0;$j<8;$j++)$temp_bytes[$j]^=$iv_plain[$j];
            $pOutBuf.=pack('C*',...$temp_bytes);
        }
        return $pOutBuf;
    }

    private function oiSymmetryDecrypt2($pInBuf,$nInBufLen,$pKey){
        if(($nInBufLen%8)!=0||$nInBufLen<16)return false;
        $dest_buf_str=$this->teaDecryptECB(substr($pInBuf,0,8),$pKey);
        $dest_buf=array_values(unpack('C*',$dest_buf_str));
        $nPadLen=$dest_buf[0]&0x07;
        $i=$nInBufLen-1-$nPadLen-self::SALT_LEN-self::ZERO_LEN;
        if($i<0)return false;
        $pOutBufLen=$i;
        $iv_pre_crypt=array_fill(0,8,0);
        $iv_cur_crypt=array_values(unpack('C*',substr($pInBuf,0,8)));
        $pInBufOffset=8;$dest_i=1;
        $dest_i+=$nPadLen;
        $salt_count=1;
        while($salt_count<=self::SALT_LEN){
            if($dest_i<8){$dest_i++;$salt_count++;}
            elseif($dest_i==8){
                $iv_pre_crypt=$iv_cur_crypt;
                $iv_cur_crypt=array_values(unpack('C*',substr($pInBuf,$pInBufOffset,8)));
                for($j=0;$j<8;$j++){if(($pInBufOffset+$j)>=$nInBufLen)return false;$dest_buf[$j]^=$iv_cur_crypt[$j];}
                $temp_buf=$this->teaDecryptECB(pack('C*',...$dest_buf),$pKey);
                $dest_buf=array_values(unpack('C*',$temp_buf));
                $pInBufOffset+=8;$dest_i=0;
            }
        }
        $nPlainLen=$pOutBufLen;$plain_bytes=[];
        while($nPlainLen>0){
            if($dest_i<8){
                $plain_bytes[]=$dest_buf[$dest_i]^$iv_pre_crypt[$dest_i];
                $dest_i++;$nPlainLen--;
            }elseif($dest_i==8){
                $iv_pre_crypt=$iv_cur_crypt;
                $iv_cur_crypt=array_values(unpack('C*',substr($pInBuf,$pInBufOffset,8)));
                for($j=0;$j<8;$j++){if(($pInBufOffset+$j)>=$nInBufLen)return false;$dest_buf[$j]^=$iv_cur_crypt[$j];}
                $temp_buf=$this->teaDecryptECB(pack('C*',...$dest_buf),$pKey);
                $dest_buf=array_values(unpack('C*',$temp_buf));
                $pInBufOffset+=8;$dest_i=0;
            }
        }
        return pack('C*',...$plain_bytes);
    }

    private function guardLastFive($value){
        $value=(string)$value;
        return strlen($value)>=5?substr($value,-5):'';
    }

    private function generateCkGuardTime($timestamp,$guid,$guardData='-1',$packageName='null',$processName='null'){
        $body=pack('N',$timestamp);
        foreach([$this->guardLastFive($guid),$this->guardLastFive($packageName),$this->guardLastFive($processName),$guardData] as $part){
            $body.=pack('n',strlen($part)).$part;
        }
        $plain=pack('n',strlen($body)).$body;
        $checksum=$this->calcSignature(array_values(unpack('C*',$plain)));
        $encrypted=$this->oiSymmetryEncrypt2($plain,strlen($plain),hex2bin(self::GUARD_TEA_KEY));
        $encrypted.=pack('N',$checksum);
        $bytes=array_values(unpack('C*',$encrypted));
        $len=count($bytes);
        for($i=0;$i<$len;$i++)$bytes[$i]^=$this->guardXorKey[$i&7];
        return strtoupper(bin2hex(pack('C*',...$bytes)));
    }

    public function encryptDataToCKey($data){
        $teaCkey=hex2bin(self::TEA_CKEY);
        $data_len=strlen($data);
        $data_array=array_values(unpack('C*',$data));
        $checksum=$this->calcSignature($data_array);
        $encrypted=$this->oiSymmetryEncrypt2($data,$data_len,$teaCkey);
        $encrypted.=pack('N',$checksum);
        $xor_array=array_values(unpack('C*',$encrypted));
        $xor_encrypted=$this->xorArray($xor_array);
        $base64_encoded=$this->customEncode(pack('C*',...$xor_encrypted));
        return "--01".$base64_encoded;
    }

    public function decryptCKeyToData($ckey){
        $teaCkey=hex2bin(self::TEA_CKEY);
        $ckey_without_prefix=substr($ckey,4);
        $base64_decoded=$this->customDecode($ckey_without_prefix);
        if(!$base64_decoded)return false;
        $xor_array=array_values(unpack('C*',$base64_decoded));
        $xor_decrypted_array=$this->xorArray($xor_array);
        $xor_decrypted=pack('C*',...$xor_decrypted_array);
        $data_len=strlen($xor_decrypted)-4;
        $encrypted_data=substr($xor_decrypted,0,$data_len);
        $checksum_bytes=substr($xor_decrypted,$data_len);
        $checksum=unpack('N',$checksum_bytes)[1];
        $decrypted=$this->oiSymmetryDecrypt2($encrypted_data,$data_len,$teaCkey);
        return ['data'=>$decrypted,'checksum'=>$checksum];
    }

    public function buildPacket($params){
        $data=hex2bin('0000004200000004000004d2');
        $data.=pack('N',$params['Platform']);
        $data.=pack('N',0);
        $data.=pack('N',$params['Timestamp']);
        $sdtfrom=$params['Sdtfrom'];$data.=pack('n',strlen($sdtfrom)).$sdtfrom;
        $randFlag=$params['randFlag'];$data.=pack('n',strlen($randFlag)).$randFlag;
        $appVer=$params['appVer'];$data.=pack('n',strlen($appVer)).$appVer;
        $vid=$params['vid'];$data.=pack('n',strlen($vid)).$vid;
        $guid=$params['guid'];$data.=pack('n',strlen($guid)).$guid;
        $data.=pack('N',1);
        $data.=pack('N',1);
        $uid="2622783A";$data.=pack('n',strlen($uid)).$uid;
        $bundleID="nil";$data.=pack('n',strlen($bundleID)).$bundleID;
        $uuid4=$params['uuid4'];$data.=pack('n',strlen($uuid4)).$uuid4;
        $data.=pack('n',strlen($bundleID)).$bundleID;
        $ckeyVersion="v0.1.000";$data.=pack('n',strlen($ckeyVersion)).$ckeyVersion;
        $packageName="com.cctv.yangshipin.app.iphone";$data.=pack('n',strlen($packageName)).$packageName;
        $platform_str="4330403";$data.=pack('n',strlen($platform_str)).$platform_str;
        $ex_json_bus="ex_json_bus";$data.=pack('n',strlen($ex_json_bus)).$ex_json_bus;
        $ex_json_vs="ex_json_vs";$data.=pack('n',strlen($ex_json_vs)).$ex_json_vs;
        $ck_guard_time=$params['ck_guard_time'];$data.=pack('n',strlen($ck_guard_time)).$ck_guard_time;
        $body_length=strlen($data);
        $buffer=pack('n',$body_length).$data;
        $buffer_array=array_values(unpack('C*',$buffer));
        $signature=$this->calcSignature($buffer_array);
        $buffer=substr($buffer,0,18).pack('N',$signature).substr($buffer,22);
        return $buffer;
    }

    public function generateCKey($cnlid,$timestamp=null){
        if($timestamp===null)$timestamp=time();
        $this->generateGuid();
        $randFlag='_zj1A5Gh6QYcxWjIUGos2w==';
        $uuid4=sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0x0fff)|0x4000,mt_rand(0,0x3fff)|0x8000,mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff));
        $ck_guard_time=$this->generateCkGuardTime($timestamp,$this->guid);
        $params=[
            'Platform'=>4330403,
            'Timestamp'=>$timestamp,
            'Sdtfrom'=>'dcgh',
            'vid'=>$cnlid,
            'guid'=>$this->guid,
            'appVer'=>'V8.22.1035.3031',
            'randFlag'=>$randFlag,
            'uuid4'=>$uuid4,
            'ck_guard_time'=>$ck_guard_time
        ];
        $buffer=$this->buildPacket($params);
        $ckey=$this->encryptDataToCKey($buffer);
        return ['ckey'=>$ckey,'params'=>$params,'buffer'=>$buffer];
    }

    private function spvcodeRaw($defn){
        $height=1080;
        if(preg_match('/(4k|8k|hdr)/i',$defn))$height=2160;
        $fr=[30,60];
        $h264=[];$h265=[];
        foreach($fr as $fps){$h264[]="{$fps}:{$height}";$h265[]="{$fps}:{$height}";}
        return "H(".implode(',',$h264)."|".implode(',',$h264).");2(".implode(',',$h265)."|".implode(',',$h265).")";
    }

    public function makeLiveRequest($cnlid,$livepid='600001859',$defn='fhd',$playseek=null){
        $this->generateGuid();
        $ckeyResult=$this->generateCKey($cnlid);
        $ckey=$ckeyResult['ckey'];
        $params=$ckeyResult['params'];
        $flowid=sprintf('%s_%d',sprintf('%04X%04X-%04X-%04X-%04X-%04X%04X%04X',mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0x0fff)|0x4000,mt_rand(0,0x3fff)|0x8000,mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff)),4330403);
        $isPlayback=!empty($playseek);
        $playbackTimestamp=null;
        if($isPlayback){
            try{
                $parts=explode('-',$playseek);
                $startTimeStr=$parts[0];
                $dateTime=DateTime::createFromFormat('YmdHis',$startTimeStr,new DateTimeZone('Asia/Shanghai'));
                if($dateTime===false)throw new Exception("回看时间格式错误");
                $playbackTimestamp=$dateTime->getTimestamp();
            }catch(Exception $e){
                return ['success'=>false,'error'=>$e->getMessage()];
            }
        }
        $spvcode=base64_encode($this->spvcodeRaw($defn));
        $request_params=[
            "atime"=>"120",
            "livepid"=>$livepid,
            "cnlid"=>$cnlid,
            "appVer"=>"V8.22.1035.3031",
            "app_version"=>"300090",
            "caplv"=>"1",
            "cmd"=>"2",
            "defn"=>$defn,
            "device"=>"iPhone",
            "encryptVer"=>"4.2",
            "getpreviewinfo"=>"0",
            "hevclv"=>"33",
            "lang"=>"zh-Hans_JP",
            "livequeue"=>"0",
            "logintype"=>"1",
            "nettype"=>"1",
            "newnettype"=>"1",
            "newplatform"=>"4330403",
            "platform"=>"4330403",
            "sdtfrom"=>"v3021",
            "spacode"=>"23",
            "spaudio"=>"1",
            "spdemuxer"=>"6",
            "spdrm"=>"2",
            "spdynamicrange"=>"7",
            "spflv"=>"1",
            "spflvaudio"=>"1",
            "sphdrfps"=>"60",
            "sphttps"=>"0",
            "spvcode"=>$spvcode,
            "spvideo"=>"4",
            "stream"=>"1",
            "system"=>"1",
            "sysver"=>"ios18.2.1",
            "uhd_flag"=>"4",
            "cKey"=>$ckey,
            "guid"=>$this->guid,
            "fntick"=>$params['Timestamp'],
            "flowid"=>$flowid,
        ];
        if($isPlayback){
            $request_params['playbacktime']=$playbackTimestamp;
            $resp=$this->sendHttpRequest($request_params);
            if($resp['success']&&!empty($resp['playurl']))return $resp;
            unset($request_params['playbacktime']);
            $resp=$this->sendHttpRequest($request_params);
            if($resp['success']&&!empty($resp['playurl'])){
                $playurl=$resp['playurl'];
                $urlParts=explode('/',$playurl);
                if(count($urlParts)>=3){
                    $urlParts[2]='tlivecloud-playback-cdn.ysp.cctv.cn/tcloud.cctv.com';
                    $playurl=implode('/',$urlParts);
                    $playurl .= (strpos($playurl,'?')!==false?'&':'?').'starttime='.$playbackTimestamp;
                }
                $resp['playurl']=$playurl;
                return $resp;
            }
            return ['success'=>false,'error'=>'获取回看地址失败'];
        }else{
            $request_params['playbacktime']="0";
            return $this->sendHttpRequest($request_params);
        }
    }

    private function sendHttpRequest($params){
        $url="https://bkliveinfo.ysp.cctv.cn";
        $query_string=http_build_query($params);
        $ch=curl_init($url.'?'.$query_string);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
        curl_setopt($ch,CURLOPT_HTTPHEADER,[
            'User-Agent: qqlive',
            'Connection: Keep-Alive',
            'Accept: application/json'
        ]);
        curl_setopt($ch,CURLOPT_TIMEOUT,15);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);
        curl_setopt($ch,CURLOPT_FOLLOWLOCATION,true);
        $response=curl_exec($ch);
        $error=curl_error($ch);
        $http_code=curl_getinfo($ch,CURLINFO_HTTP_CODE);
        curl_close($ch);
        if($error)return ['success'=>false,'error'=>'curl错误:'.$error];
        $data=json_decode($response,true);
        if(!$data)return ['success'=>false,'error'=>'无效JSON','raw'=>$response];
        $ok=($data['iretcode']==0);
        return [
            'success'=>$ok,
            'iretcode'=>$data['iretcode'],
            'error'=>$data['errinfo']??'ok',
            'playurl'=>$data['playurl']??null
        ];
    }

    public function getPlayUrl($cnlid,$livepid='600001859',$defn='fhd',$playseek=null){
        $res=$this->makeLiveRequest($cnlid,$livepid,$defn,$playseek);
        if($res['success']&&!empty($res['playurl']))return $res['playurl'];
        return null;
    }
}

// ---------------- 主程序开始 ----------------
$ckeyManager=new CKeyManager();
$playseek=$_GET['playseek']??null;
$cookieKey='playurl_cache';
$cacheTimeoutLive=80;
$cookieExpire=time()+3600;
$cacheJson=$_COOKIE[$cookieKey]??'{}';
$cache=json_decode($cacheJson,true)?:[];
$now=time();
$isLive=($playseek===null||$playseek==='');
$playUrl=null;
$maxAttempts=2;

for($attempt=1;$attempt<=$maxAttempts;$attempt++){
    $needRefresh=true;
    if($attempt==1&&$isLive){
        if(isset($cache[$id])&&is_array($cache[$id])){
            $entry=$cache[$id];
            if(($now-$entry['time'])<=$cacheTimeoutLive){
                $needRefresh=false;
                $playUrl=$entry['url'];
            }
        }
    }
    if($needRefresh){
        $playUrl=$ckeyManager->getPlayUrl($n[$id][0],$n[$id][1],$n[$id][2],$playseek);
        if(!$playUrl)die("获取播放地址失败\n");
        if($isLive){
            $cache[$id]=['url'=>$playUrl,'time'=>$now];
            setcookie($cookieKey,json_encode($cache),$cookieExpire,'/');
        }else{
            header("Location: ".$playUrl);
            exit();
        }
    }

    // ==========【修复点】用curl替代file_get_contents读取m3u8，携带UA头 ==========
    $ch2=curl_init($playUrl);
    curl_setopt($ch2,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($ch2,CURLOPT_TIMEOUT,12);
    curl_setopt($ch2,CURLOPT_SSL_VERIFYPEER,false);
    curl_setopt($ch2,CURLOPT_SSL_VERIFYHOST,false);
    curl_setopt($ch2,CURLOPT_FOLLOWLOCATION,true);
    curl_setopt($ch2,CURLOPT_HTTPHEADER,[
        "User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.1",
        "Referer: https://tv.cctv.com/"
    ]);
    $m3u8Content=curl_exec($ch2);
    $curl_err=curl_error($ch2);
    curl_close($ch2);
    if($curl_err || empty($m3u8Content)){
        $m3u8Content=false;
    }
    if($m3u8Content!==false)break;
    if($attempt==1 && $isLive && !$needRefresh){
        unset($cache[$id]);
        setcookie($cookieKey,json_encode($cache),$cookieExpire,'/');
    }
}

if ($m3u8Content === false) {
    die("无法获取 M3U8 内容，请稍后重试\n");
}

$baseUrl=substr($playUrl,0,strrpos($playUrl,'/')+1);
header('Content-Type: application/vnd.apple.mpegurl');
echo preg_replace("/(.*?.ts)/i",$baseUrl."$1",$m3u8Content);
exit();