/** Play a random http stream. */
public void playStream()
throws EncoderException, LineUnavailableException, IOException, UnsupportedAudioFileException,
InterruptedException {
String source;
SourceDataLine line;
DataLine.Info info;
// The source stream
source = "http://mp3.streampower.be/stubru-high.mp3";
source = "http://mp3.streampower.be/klara-high.mp3";
// Set the transcoding to WAV PCM, 16bits LE, 16789Hz (to make sure resampling is done).
Attributes attributes = DefaultAttributes.WAV_PCM_S16LE_STEREO_44KHZ.getAttributes();
attributes.setSamplingRate(16789);
// Stream the same file with on the fly decoding:
AudioInputStream streamedAudioInputStream = Streamer.stream(source, attributes);
AudioFormat audioFormat = Streamer.streamAudioFormat(attributes);
byte[] streamBuffer = new byte[1024];
info = new DataLine.Info(SourceDataLine.class, audioFormat);
line = (SourceDataLine) AudioSystem.getLine(info);
line.open(audioFormat);
line.start();
while (streamedAudioInputStream.available() > streamBuffer.length) {
int bytesRead = streamedAudioInputStream.read(streamBuffer);
int bytesWrote = line.write(streamBuffer, 0, streamBuffer.length);
assertEquals(
"The number of bytes read should match the number of bytes written to the dataline",
bytesRead,
bytesWrote);
}
line.close();
streamedAudioInputStream.close();
}
/**
* Streaming and transcoding the same file should yield the exact same results. To test this an
* mp3 is decoded and resampled and via transcoding and via streaming.
*/
public void compareTranscodingAndStreaming(String source)
throws EncoderException, LineUnavailableException, IOException, UnsupportedAudioFileException,
InterruptedException {
System.out.println("Testing: " + source);
// Set the transcoding to WAV PCM, 16bits LE, 16789Hz (to make sure resampling is done).
Attributes attributes = DefaultAttributes.WAV_PCM_S16LE_STEREO_44KHZ.getAttributes();
attributes.setSamplingRate(16789);
// Save the transcoded file:
File temporaryTranscoded = File.createTempFile("temporaryTranscoded", ".wav");
Transcoder.transcode(source, temporaryTranscoded.getAbsolutePath(), attributes);
AudioInputStream transcodedAudioInputStream =
AudioSystem.getAudioInputStream(temporaryTranscoded);
// Stream the same file with on the fly decoding:
AudioInputStream streamedAudioInputStream = Streamer.stream(source, attributes);
byte[] streamBuffer = new byte[1024];
byte[] transcodedBuffer = new byte[streamBuffer.length];
int sampleCounter = 0;
while (streamedAudioInputStream.available() > streamBuffer.length
&& transcodedAudioInputStream.available() > streamBuffer.length) {
streamedAudioInputStream.read(streamBuffer);
transcodedAudioInputStream.read(transcodedBuffer);
for (int i = 0; i < streamBuffer.length; i++) {
sampleCounter++;
assertEquals(
"Difference at sample: " + sampleCounter, transcodedBuffer[i], streamBuffer[i]);
}
}
streamedAudioInputStream.close();
transcodedAudioInputStream.close();
temporaryTranscoded.delete();
}