php生成指定频率和声音的音频文件(代码教程)
程序员文章站
2022-03-21 08:35:34
找了好久没有找到,php生成音频的代码,自己写了份,代码如下:
> 24 & 255;
$wav[6] = $headerLen >> 1...
找了好久没有找到,php生成音频的代码,自己写了份,代码如下:
> 24 & 255; $wav[6] = $headerLen >> 16 & 255; $wav[5] = $headerLen >> 8 & 255; $wav[4] = ord(chr($headerLen)); $wav[8] = 87; $wav[9] = 65; $wav[10] = 86; $wav[11] = 69; $wav[12] = 102; $wav[13] = 109; $wav[14] = 116; $wav[15] = 32; $wav[16] = 16; $wav[17] = 0; $wav[18] = 0; $wav[19] = 0; $wav[20] = 1; $wav[21] = 0; $wav[22] = M_CHANNELS; $wav[23] = 0; $wav[24] = ord(chr(M_SAMPLEFREQ)); $wav[25] = M_SAMPLEFREQ >> 8 & 255; $wav[26] = M_SAMPLEFREQ >> 16 & 255; $wav[27] = M_SAMPLEFREQ >> 24 & 255; $nAvgBytesPerSec = M_SAMPLEFREQ * M_CHANNELS * M_CHANNELBITS / 8; $wav[28] = ord(chr($nAvgBytesPerSec)); $wav[29] = $nAvgBytesPerSec >> 8 & 255; $wav[30] = $nAvgBytesPerSec >> 16 & 255; $wav[31] = $nAvgBytesPerSec >> 24 & 255; $wav[32] = 2; $wav[33] = 0; $wav[34] = M_CHANNELBITS; $wav[35] = 0; $wav[36] = 100; $wav[37] = 97; $wav[38] = 116; $wav[39] = 97; $dataLen = $totalLen - WAVE_HEAD_LENGTH; $wav[43] = $dataLen >> 24 & 255; $wav[42] = $dataLen >> 16 & 255; $wav[41] = $dataLen >> 8 & 255; $wav[40] = ord(chr($dataLen)); $len = $totalLen - WAVE_HEAD_LENGTH; $dLen = intval($len / 10); for ($i = 1; $i <= 10; $i++) { wavData(M_SAMPLEFREQ, $freq + 100 * $i, $volume, $wav, WAVE_HEAD_LENGTH + $dLen * ($i - 1), $dLen); } return $wav; } function wavData($rate, $freq, $amp, &$p, $pp, $len) { for ($i = 0; $i <= $len - 1; $i += 2) { $v = sin(($len - $i) * PI / $rate * $freq) / 180 * ($amp * 32768 + 32768); $p[$pp + $i] = $v & 255; $p[$pp + $i + 1] = $v >> 8 & 255; } } $data = makeWav(2000, 89, 5000); $res = fopen('./test.wav', 'wb'); $bin = pack("c*", ...$data); fwrite($res, $bin, strlen($bin)); fclose($res);
上一篇: Docker容器连接相互通信的实现
下一篇: HTML标记的语法