[quote]File

[SWFKit]

Scopas says:

Anyone knows how to access a given files summary? Or a mp3 file id3 info..??

The reason is that I need the bit rate..

/Scopas

[SWFKit]

http://home.swipnet.se/grd/mp3info
The following code is a FFish script clone of the c++ code from the site. you can write your own id3 tag reader.

We found a design fault of the Stream object. It's only designed to access small text files, requires both reading and writing permission. It cannot handle read-only files. However, the fault is fixed. The following code can't work on read-only files before the new update come out.

function mp3Header(head)
{
this.frameHeader = head;

this.getVersion = function ()
{
var version = [2.5, 0.0, 2.0, 1.0];
return version[this.getVersionIndex()];
}

this.getLayer = function ()
{
return 4 - this.getLayerIndex();
}

this.getBitrate = function ()
{
var table = [0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0,
0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0,
0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0,
0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0,
0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 0,
0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 0];

var index = 48 * (this.getVersionIndex() & 1) + 16 * (this.getLayerIndex() - 1) + this.getBitrateIndex();
return table[index];
}

this.getFrequency = function ()
{
var table = [32000, 16000, 8000, 0, 0, 0, 22050, 24000, 16000, 44100, 48000, 32000];
var index = this.getVersionIndex() * 3 + this.getFrequencyIndex();

return table[index];
}

this.getMode = function ()
{
switch (this.getModeIndex())
{
case 1: return "Joint Stereo";
case 2: return "Dual Channel";
case 3: return "Single Channel";
default: return "Stereo";
}
}

this.isValid = function ()
{
return (((this.getFrameSync() & 2047) == 2047) &&
     ((this.getVersionIndex() & 3) != 1) &&
       ((this.getLayerIndex() & 3) != 0) && 
       ((this.getBitrateIndex() & 15) != 0) && 
       ((this.getBitrateIndex() & 15) != 15) &&
       ((this.getFrequencyIndex() & 3) != 3) &&
       ((this.getEmphasisIndex() & 3) != 2));
}

function getFrameSync()   { return ((this.frameHeader >> 21) & 2047); };
   function getVersionIndex() { return ((this.frameHeader >> 19) & 3); };
   function getLayerIndex()  { return ((this.frameHeader >> 17) & 3); };
   function getProtectionBit() { return ((this.frameHeader >> 16) & 1); };
   function getBitrateIndex() { return ((this.frameHeader >> 12) & 15); };
   function getFrequencyIndex(){ return ((this.frameHeader >> 10) & 3); };
   function getPaddingBit()  { return ((this.frameHeader >> 9) & 1); };
   function getPrivateBit()  { return ((this.frameHeader >> 8) & 1); };
   function getModeIndex()   { return ((this.frameHeader >> 6) & 3); };
   function getModeExtIndex() { return ((this.frameHeader >> 4) & 3); };
   function getCoprightBit()  { return ((this.frameHeader >> 3) & 1); };
   function getOrginalBit()  { return ((this.frameHeader >> 2) & 1); };
   function getEmphasisIndex() { return ((this.frameHeader) & 3); };
}

function getMP3Header(name)
{
var stream = new Stream(name);
var mp3HeadInfo = new mp3Header(0);
var head = 0;

do 
{
if (stream.pos > 200 || stream.pos >= stream.length)
{
stream.close();
return null;
}

var s = stream.read(4);

mp3HeadInfo.frameHeader = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];

processMsg();
}
while (!mp3HeadInfo.isValid());

stream.close();

if (mp3HeadInfo.isValid()) return mp3HeadInfo;

return null; 
}

var info = getMP3Header("c:\\songs\\1.mp3");
if (info)
{
trace(info.getVersion());
trace(info.getLayer());
trace(info.getBitrate());
trace(info.getFrequency());
trace(info.getMode());
}

[SWFKit]

Scopas says:

It works fine.. But.. the reason why I needed the bitrate was actually because the mediaplayer can't figure out the length of a vbr mp3.. I thought that if I could get the vbr of a file then I can calculate the length of an mp3..

I checked out the link you reffered to http://home.swipnet.se/grd/mp3info/vbrheader/index.html

But I've spent quite a large amount of time figuring aout how to get the right information.. The problem is that I can't figure out to work the stream object right.. Anyway I was figuring if you had also translated this script into ffish script..??

/Scopas

[SWFKit]

Scopas says:

I figured it out at last..
It helped when I learned the stream.pos to know..

Anyway the code is pretty smashed up right now but if anyone wants it I can post it when I cleaned it up a bit..

/Scopas

[SWFKit]

OK,post please,and share with us!

[SWFKit]

scopas says:

var head;
function mp3Header(head){
this.frameHeader = head;

this.getVersion = function (){
var version = [2.5, 0.0, 2.0, 1.0];
return version[this.getVersionIndex()];
}

this.getLayer = function (){
return 4 - this.getLayerIndex();
}

this.getBitrate = function (){
var table = [0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0,
0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0,
0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0,
0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0,
0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 0,
0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 0];

var index = 48 * (this.getVersionIndex() & 1) + 16 * (this.getLayerIndex() - 1) + this.getBitrateIndex();
return table[index];
}

this.getFrequency = function (){
var table = [32000, 16000, 8000, 0, 0, 0, 22050, 24000, 16000, 44100, 48000, 32000];
var index = this.getVersionIndex() * 3 + this.getFrequencyIndex();

return table[index];
}

this.getMode = function (){
switch (this.getModeIndex()){
case 1: return "Joint Stereo";
case 2: return "Dual Channel";
case 3: return "Single Channel";
default: return "Stereo";
}
}

this.isValid = function (){
return (((this.getFrameSync() & 2047) == 2047) &&
((this.getVersionIndex() & 3) != 1) &&
((this.getLayerIndex() & 3) != 0) &&
((this.getBitrateIndex() & 15) != 0) &&
((this.getBitrateIndex() & 15) != 15) &&
((this.getFrequencyIndex() & 3) != 3) &&
((this.getEmphasisIndex() & 3) != 2));
}

function getFrameSync() { return ((this.frameHeader >> 21) & 2047); };
function getVersionIndex() { return ((this.frameHeader >> 19) & 3); };
function getLayerIndex() { return ((this.frameHeader >> 17) & 3); };
function getProtectionBit() { return ((this.frameHeader >> 16) & 1); };
function getBitrateIndex() { return ((this.frameHeader >> 12) & 15); };
function getFrequencyIndex(){ return ((this.frameHeader >> 10) & 3); };
function getPaddingBit() { return ((this.frameHeader >> 9) & 1); };
function getPrivateBit() { return ((this.frameHeader >> 8) & 1); };
function getModeIndex() { return ((this.frameHeader >> 6) & 3); };
function getModeExtIndex() { return ((this.frameHeader >> 4) & 3); };
function getCoprightBit() { return ((this.frameHeader >> 3) & 1); };
function getOrginalBit() { return ((this.frameHeader >> 2) & 1); };
function getEmphasisIndex() { return ((this.frameHeader) & 3); };
}

function getMP3Header(name){
var stream = new Stream(name);
var mp3HeadInfo = new mp3Header(0);
head = 0;

do{
stream.pos = head;
if(stream.pos > (1024*200) || stream.pos >= stream.length){
stream.close();
return null;
}
var s = stream.read(4);
mp3HeadInfo.frameHeader = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
processMsg();
head++;
}while (!mp3HeadInfo.isValid());

stream.close();
if (mp3HeadInfo.isValid()) return mp3HeadInfo;
return null;
}


function mp3Xing(p){
this.p = p;

this.myFlag = function (){ return head - 1; }
this.myFrames = function (){ return (this.p[4] << 24) | (this.p[5] << 16) | (this.p[6] << 8) | this.p[7]; }
this.myFsize = function (){ return (this.p[8] << 24) | (this.p[9] << 16) | (this.p[10] << 8) | this.p[11]; }

this.isValid = function (){
if(this.myFrames != "" && this.myFsize != "" && this.myFlag != ""){
return true;
}else{
return false;
}
}
}

function getMp3Xing(name){
var mp3XingInfo = new mp3Xing(0);

var Xstream = new Stream(name);
var i = 0;
var j = 1;
do{
Xstream.pos = i;
s = Xstream.read(4);
if(s == "Xing"){
mp3XingInfo.p = Xstream.read(12);
j = 2;
}
i++;
if(i > (head + 10000)){ j = 2; }
}while (j == 1 || Xstream.pos >= Xstream.length);
Xstream.close();

if (mp3XingInfo.isValid()) return mp3XingInfo;
}

var f = "audio files(*.mp3)|*.mp3;|all files(*.*)|*.*|"
var res = Dialogs.fileOpen(f, "", "", true);
var path = res[0];

var info;
if(path){ info = getMP3Header(path); }
if(info){
trace("Version: "+ info.getVersion());
trace("Layer: "+ info.getLayer());
trace("Bitrate: "+ info.getBitrate());
trace("Frequency: "+ info.getFrequency());
trace("Mode: "+ info.getMode());
}
var info2;
if(path){ info2 = getMp3Xing(path);}
if(info2){
trace("Header position: "+ info2.myFlag());
trace("Total frames: "+ info2.myFrames());
trace("File size: "+ info2.myFsize());

if(info2.myFrames()){
if(info.getLayer() == 1){
var myVBR = ((info2.myFsize()/info2.myFrames())*info.getFrequency())/12000;
var myTime = (info2.myFsize()*8)/(myVBR*1000);
trace("VBR - "+ myVBR);
trace("Length in seconds - "+ myTime);
}else{
var myVBR = ((info2.myFsize()/info2.myFrames())*info.getFrequency())/144000;
var myTime = (info2.myFsize()*8)/(myVBR*1000);
trace("VBR - "+ myVBR);
trace("Length in seconds - "+ myTime);
}
}
}