private int lame_decode_initfile(Stream fd, MP3Data mp3data, Enc enc)
{
var buf = new byte[100];
var pcm_l = new short[1152];
var pcm_r = new short[1152];
var freeformat = false;
if (hip != null)
{
mpg.hip_decode_exit(hip);
}
hip = mpg.hip_decode_init();
var len = 4;
if (fd.Position + len > fd.Length)
{
return(-1);
}
fd.Read(buf, 0, len);
if (buf[0] == (sbyte)'I' && buf[1] == (sbyte)'D' && buf[2] == (sbyte)'3')
{
len = 6;
try
{
fd.Read(buf, 0, len);
}
catch (IOException e)
{
return(-1);
}
buf[2] &= 127;
buf[3] &= 127;
buf[4] &= 127;
buf[5] &= 127;
len = (((((buf[2] << 7) + buf[3]) << 7) + buf[4]) << 7) + buf[5];
try
{
fd.Seek(len, SeekOrigin.Current);
}
catch (IOException e)
{
return(-1);
}
len = 4;
try
{
fd.Read(buf, 0, len);
}
catch (IOException e)
{
return(-1);
}
}
if (check_aid(buf))
{
try
{
fd.Read(buf, 0, 2);
}
catch (IOException e)
{
return(-1);
}
var aid_header = (buf[0] & 0xff) + 256 * (buf[1] & 0xff);
try
{
fd.Seek(aid_header - 6, SeekOrigin.Current);
}
catch (IOException e)
{
return(-1);
}
try
{
fd.Read(buf, 0, len);
}
catch (IOException e)
{
return(-1);
}
}
len = 4;
while (!is_syncword_mp123(buf))
{
int i;
for (i = 0; i < len - 1; i++)
{
buf[i] = buf[i + 1];
}
try
{
fd.Read(buf, len - 1, 1);
}
catch (IOException e)
{
return(-1);
}
}
if ((buf[2] & 0xf0) == 0)
{
freeformat = true;
}
var ret = mpg.hip_decode1_headersB(hip, buf, len, pcm_l, pcm_r, mp3data, enc, false);
if (-1 == ret)
{
return(-1);
}
while (!mp3data.header_parsed)
{
try
{
fd.Read(buf, 0, buf.Length);
}
catch (IOException e)
{
return(-1);
}
ret = mpg.hip_decode1_headersB(hip, buf, buf.Length, pcm_l, pcm_r, mp3data, enc, false);
if (-1 == ret)
{
return(-1);
}
}
if (mp3data.bitrate == 0 && !freeformat)
{
return(lame_decode_initfile(fd, mp3data, enc));
}
if (mp3data.totalframes > 0)
{
}
else
{
mp3data.nsamp = -1;
}
return(0);
}
private int lame_decode_initfile(FileStream fd, MP3Data mp3data, Enc enc)
{
var buf = new byte[100];
var pcm_l = new short[1152];
var pcm_r = new short[1152];
var freeformat = false;
if (hip != null)
{
mpg.hip_decode_exit(hip);
}
hip = mpg.hip_decode_init();
var len = 4;
try
{
fd.Read(buf, 0, len);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
if (buf[0] == (sbyte)'I' && buf[1] == (sbyte)'D' && buf[2] == (sbyte)'3')
{
if (parse.silent < 10)
{
Console.WriteLine(
"ID3v2 found. " + "Be aware that the ID3 tag is currently lost when transcoding.");
}
len = 6;
try
{
fd.Read(buf, 0, len);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
buf[2] &= 127;
buf[3] &= 127;
buf[4] &= 127;
buf[5] &= 127;
len = (((((buf[2] << 7) + buf[3]) << 7) + buf[4]) << 7) + buf[5];
try
{
fd.Seek(len, SeekOrigin.Current);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
len = 4;
try
{
fd.Read(buf, 0, len);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
}
if (check_aid(buf))
{
try
{
fd.Read(buf, 0, 2);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
var aid_header = (buf[0] & 0xff) + 256 * (buf[1] & 0xff);
if (parse.silent < 10)
{
Console.Write("Album ID found. length={0:D} \n", aid_header);
}
try
{
fd.Seek(aid_header - 6, SeekOrigin.Current);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
try
{
fd.Read(buf, 0, len);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
}
len = 4;
while (!is_syncword_mp123(buf))
{
int i;
for (i = 0; i < len - 1; i++)
{
buf[i] = buf[i + 1];
}
try
{
fd.Read(buf, len - 1, 1);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
}
if ((buf[2] & 0xf0) == 0)
{
if (parse.silent < 10)
{
Console.WriteLine("Input file is freeformat.");
}
freeformat = true;
}
var ret = mpg.hip_decode1_headersB(hip, buf, len, pcm_l, pcm_r, mp3data, enc);
if (-1 == ret)
{
return(-1);
}
while (!mp3data.header_parsed)
{
try
{
fd.Read(buf, 0, 1024);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(-1);
}
ret = mpg.hip_decode1_headersB(hip, buf, buf.Length, pcm_l, pcm_r, mp3data, enc);
if (-1 == ret)
{
return(-1);
}
}
if (mp3data.bitrate == 0 && !freeformat)
{
if (parse.silent < 10)
{
Console.Error.WriteLine("fail to sync...");
}
return(lame_decode_initfile(fd, mp3data, enc));
}
if (mp3data.totalframes > 0)
{
}
else
{
mp3data.nsamp = -1;
}
return(0);
}