Class Encoder

src/main/java/mp3/Encoder.java:29–654

package mp3;

public class Encoder {
	BitStream bs;
	public PsyModel psy;
	VBRTag vbr;
	QuantizePVT qupvt;

	public final void setModules(BitStream bs, PsyModel psy, QuantizePVT qupvt,
			VBRTag vbr) {
		this.bs = bs;
		this.psy = psy;
		this.vbr = vbr;
		this.qupvt = qupvt;
	}

	private NewMDCT newMDCT = new NewMDCT();

	/***********************************************************************
	 * 
	 * encoder and decoder delays
	 * 
	 ***********************************************************************/

	/**
	 * <PRE>
	 * layer III enc->dec delay:  1056 (1057?)   (observed)
	 * layer  II enc->dec delay:   480  (481?)   (observed)
	 * 
	 * polyphase 256-16             (dec or enc)        = 240
	 * mdct      256+32  (9*32)     (dec or enc)        = 288
	 * total:    512+16
	 * 
	 * My guess is that delay of polyphase filterbank is actualy 240.5
	 * (there are technical reasons for this, see postings in mp3encoder).
	 * So total Encode+Decode delay = ENCDELAY + 528 + 1
	 * </PRE>
	 */

	/**
	 * ENCDELAY The encoder delay.
	 * 
	 * Minimum allowed is MDCTDELAY (see below)
	 * 
	 * The first 96 samples will be attenuated, so using a value less than 96
	 * will result in corrupt data for the first 96-ENCDELAY samples.
	 * 
	 * suggested: 576 set to 1160 to sync with FhG.
	 */
	public static final int ENCDELAY = 576;

	/**
	 * make sure there is at least one complete frame after the last frame
	 * containing real data
	 * 
	 * Using a value of 288 would be sufficient for a a very sophisticated
	 * decoder that can decode granule-by-granule instead of frame by frame. But
	 * lets not assume this, and assume the decoder will not decode frame N
	 * unless it also has data for frame N+1
	 */