public static byte[] ReadStreamToByteArray(this IRandomAccessStream oriStream)
{
var stream = oriStream.AsStreamForRead();
stream.Seek(0, SeekOrigin.Begin);
var data = new byte[stream.Length];
stream.Read(data, 0, (int)stream.Length);
return data;
}
/// <summary>
/// Read off the Id3Data from the stream and return the first MpegFrame of the audio stream.
/// This assumes that the first bit of data is either an ID3 segment or an MPEG segment. Calls a separate thread
/// to read past ID3v2 data.
/// </summary>
/// <param name="randomAccessStream"></param>
/// <returns>The first MpegFrame.</returns>
public static MpegFrame ReadPastId3V2Tags(this IRandomAccessStream randomAccessStream)
{
MpegFrame mpegFrame = null;
var audioStream = randomAccessStream.AsStreamForRead();
if (audioStream != null)
{
// Read and (throw out) any Id3 data if present.
byte[] data = new byte[10];
audioStream.Position = 0;
if (audioStream.Read(data, 0, 3) != 3)
{
goto cleanup;
}
if (data[0] == 73 /* I */ &&
data[1] == 68 /* D */ &&
data[2] == 51 /* 3 */)
{
// Need to update to read the is footer present flag and account for its 10 bytes if needed.
if (audioStream.Read(data, 3, 7) != 7)
{
goto cleanup;
}
int id3Size = BitTools.ConvertSyncSafeToInt32(data, 6);
int bytesRead = 0;
// Read through the ID3 Data tossing it out.)
while (id3Size > 0)
{
bytesRead = (id3Size - buffer.Length > 0)
? audioStream.Read(buffer, 0, buffer.Length)
: audioStream.Read(buffer, 0, id3Size);
id3Size -= bytesRead;
}
mpegFrame = new MpegFrame(audioStream);
}
else
{
// No ID3 tag present, presumably this is streaming and we are starting right at the Mp3 data.
// Assume the stream isn't seekable.
if (audioStream.Read(data, 3, 1) != 1)
{
goto cleanup;
}
mpegFrame = new MpegFrame(audioStream, data);
}
}
return mpegFrame;
// Cleanup and quit if you couldn't even read the initial data for some reason.
cleanup:
throw new Exception("Could not read intial audio stream data");
}
