Custom player DataSource without possible RTSP streaming?

Dear people,

everyone SUCCEEDS with Manager.createPlayer (source of data source)
with the data source customized with real audio STREAMING?
I mean without using the "rtsp: / / ' locator, just feed the player with your data buffer, which is more...

Example of the RIM is downloading the full file first is nothing new compared to the default behavior of the reader (read full datafile before playing; I understand that it could get in the J2ME standard, but then these methods makes no sense

When I try to read an audio stream (audio/amr) I see that the Player tries to put first the cached data (called read() length from 58000 until my current buffer size), the computer begins to play (the role he was able to buffer at the beginning) but ends by with code 5 error what Unspecified «» : an error has occurred which does not fit into another category. »

It looks like you are not conform to the contract of the SourceStream.read method. First of all, if currentPosition + len > stream.size (), and then you return stream.size () rather than the () - currentPosition bytes stream.size bytes. Second, if currentPosition + len<= stream.size(),="" you're="" returning="" the="" right="" bytes="" for="" the="" first="" time,="" but="" then="" you="" don't="" appear="" to="" be="" updating="" the="" currentposition="" variable="" --="" so,="" if="" the="" condition="" is="" still="" true="" on="" the="" next="" read,="" you're="" returning="" the="" same="" frames="" as="" last="" time="" causing="" the="" user="" to="" hear="" a="">

Here is how the read method should look like (minus the part blocking when no data is available and less-1 or EOFException when the SourceStream is closed or stopped)-I have tried compiling or running it though:

public int read(byte[] b, int off, int len) throws IOException {  if (len < 1) {    return 0;  }

  final int streamSize = stream.size();  final int currentPosition = (int) this.currentPosition;  final int bytesToReturn = Math.min(streamSize - currentPosition, len);  if (bytesToReturn < 1) {    // TODO: Need to block here on the stream until some bytes are available    return 0;  }

  System.arraycopy(stream.getByteArray(), currentPosition, b, off, bytesToReturn);  currentPosition += bytesToReturn;   return bytesToReturn;}

PS Examples of RIM (do not remember those who) have a shared stream in which a son written data and another thread reads the data from. This may be another (simpler) solution to your problem, your reading will be a one-liner: return sharedStream.read (b, off, len).

Tags: BlackBerry Developers

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