/*
 * MP3 quantization
 *
 *      Copyright (c) 1999-2000 Mark Taylor
 *      Copyright (c) 1999-2003 Takehiro Tominaga
 *      Copyright (c) 2000-2007 Robert Hegemann
 *      Copyright (c) 2001-2005 Gabriel Bouvigne
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.     See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* $Id: Quantize.java,v 1.24 2011/05/24 20:48:06 kenchis Exp $ */

package mp3;

import java.util.Arrays;

public class Quantize {
	BitStream bs;
	Reservoir rv;
	QuantizePVT qupvt;
	VBRQuantize vbr = new VBRQuantize();
	Takehiro tk;

	public final void setModules(BitStream bs, Reservoir rv, QuantizePVT qupvt,
			Takehiro tk) {
		this.bs = bs;
		this.rv = rv;
		this.qupvt = qupvt;
		this.tk = tk;
		this.vbr.setModules(qupvt, tk);
	}

	/**
	 * convert from L/R <. Mid/Side
	 */
	public final void ms_convert(final IIISideInfo l3_side, final int gr) {
		for (int i = 0; i < 576; ++i) {
			float l = l3_side.tt[gr][0].xr[i];
			float r = l3_side.tt[gr][1].xr[i];
			l3_side.tt[gr][0].xr[i] = (l + r) * (float) (Util.SQRT2 * 0.5);
			l3_side.tt[gr][1].xr[i] = (l - r) * (float) (Util.SQRT2 * 0.5);
		}
	}

	/**
	 * mt 6/99
	 * 
	 * initializes cod_info, scalefac and xrpow
	 * 
	 * returns 0 if all energies in xr are zero, else 1
	 */
	private float init_xrpow_core(final GrInfo cod_info, float xrpow[],
			int upper, float sum) {
		sum = 0;
		for (int i = 0; i <= upper; ++i) {
			float tmp = Math.abs(cod_info.xr[i]);
			sum += tmp;
			xrpow[i] = (float) Math.sqrt(tmp * Math.sqrt(tmp));

			if (xrpow[i] > cod_info.xrpow_max)
				cod_info.xrpow_max = xrpow[i];
		}
		return sum;
	}

	public final boolean init_xrpow(final LameInternalFlags gfc,
			final GrInfo cod_info, float xrpow[]) {
		float sum = 0;
		final int upper = cod_info.max_nonzero_coeff;

		assert (xrpow != null);
		cod_info.xrpow_max = 0;

		/*
		 * check if there is some energy we have to quantize and calculate xrpow
		 * matching our fresh scalefactors
		 */
		assert (0 <= upper && upper <= 575);

		Arrays.fill(xrpow, upper, 576, 0);

		sum = init_xrpow_core(cod_info, xrpow, upper, sum);

		/*
		 * return 1 if we have something to quantize, else 0
		 */
		if (sum > 1E-20f) {
			int j = 0;
			if ((gfc.substep_shaping & 2) != 0)
				j = 1;

			for (int i = 0; i < cod_info.psymax; i++)
				gfc.pseudohalf[i] = j;

			return true;
		}

		Arrays.fill(cod_info.l3_enc, 0, 576, 0);
		return false;
	}

	/**
	 * Gabriel Bouvigne feb/apr 2003<BR>
	 * Analog silence detection in partitionned sfb21 or sfb12 for short blocks
	 * 
	 * From top to bottom of sfb, changes to 0 coeffs which are below ath. It
	 * stops on the first coeff higher than ath.
	 */
	private void psfb21_analogsilence(final LameInternalFlags gfc,
			final GrInfo cod_info) {
		final ATH ath = gfc.ATH;
		final float[] xr = cod_info.xr;

		if (cod_info.block_type != Encoder.SHORT_TYPE) {
			/* NORM, START or STOP type, but not SHORT blocks */
			boolean stop = false;
			for (int gsfb = Encoder.PSFB21 - 1; gsfb >= 0 && !stop; gsfb--) {
				final int start = gfc.scalefac_band.psfb21[gsfb];
				final int end = gfc.scalefac_band.psfb21[gsfb + 1];
				float ath21 = qupvt.athAdjust(ath.adjust, ath.psfb21[gsfb],
						ath.floor);

				if (gfc.nsPsy.longfact[21] > 1e-12f)
					ath21 *= gfc.nsPsy.longfact[21];

				for (int j = end - 1; j >= start; j--) {
					if (Math.abs(xr[j]) < ath21)
						xr[j] = 0;
					else {
						stop = true;
						break;
					}
				}
			}
		} else {
			/* note: short blocks coeffs are reordered */
			for (int block = 0; block < 3; block++) {
				boolean stop = false;
				for (int gsfb = Encoder.PSFB12 - 1; gsfb >= 0 && !stop; gsfb--) {
					final int start = gfc.scalefac_band.s[12]
							* 3
							+ (gfc.scalefac_band.s[13] - gfc.scalefac_band.s[12])
							* block
							+ (gfc.scalefac_band.psfb12[gsfb] - gfc.scalefac_band.psfb12[0]);
					final int end = start
							+ (gfc.scalefac_band.psfb12[gsfb + 1] - gfc.scalefac_band.psfb12[gsfb]);
					float ath12 = qupvt.athAdjust(ath.adjust, ath.psfb12[gsfb],
							ath.floor);

					if (gfc.nsPsy.shortfact[12] > 1e-12f)
						ath12 *= gfc.nsPsy.shortfact[12];

					for (int j = end - 1; j >= start; j--) {
						if (Math.abs(xr[j]) < ath12)
							xr[j] = 0;
						else {
							stop = true;
							break;
						}
					}
				}
			}
		}

	}

	public final void init_outer_loop(final LameInternalFlags gfc,
			final GrInfo cod_info) {
		/*
		 * initialize fresh cod_info
		 */
		cod_info.part2_3_length = 0;
		cod_info.big_values = 0;
		cod_info.count1 = 0;
		cod_info.global_gain = 210;
		cod_info.scalefac_compress = 0;
		/* mixed_block_flag, block_type was set in psymodel.c */
		cod_info.table_select[0] = 0;
		cod_info.table_select[1] = 0;
		cod_info.table_select[2] = 0;
		cod_info.subblock_gain[0] = 0;
		cod_info.subblock_gain[1] = 0;
		cod_info.subblock_gain[2] = 0;
		cod_info.subblock_gain[3] = 0; /* this one is always 0 */
		cod_info.region0_count = 0;
		cod_info.region1_count = 0;
		cod_info.preflag = 0;
		cod_info.scalefac_scale = 0;
		cod_info.count1table_select = 0;
		cod_info.part2_length = 0;
		cod_info.sfb_lmax = Encoder.SBPSY_l;
		cod_info.sfb_smin = Encoder.SBPSY_s;
		cod_info.psy_lmax = gfc.sfb21_extra ? Encoder.SBMAX_l : Encoder.SBPSY_l;
		cod_info.psymax = cod_info.psy_lmax;
		cod_info.sfbmax = cod_info.sfb_lmax;
		cod_info.sfbdivide = 11;
		for (int sfb = 0; sfb < Encoder.SBMAX_l; sfb++) {
			cod_info.width[sfb] = gfc.scalefac_band.l[sfb + 1]
					- gfc.scalefac_band.l[sfb];
			/* which is always 0. */
			cod_info.window[sfb] = 3;
		}
		if (cod_info.block_type == Encoder.SHORT_TYPE) {
			float ixwork[] = new float[576];

			cod_info.sfb_smin = 0;
			cod_info.sfb_lmax = 0;
			if (cod_info.mixed_block_flag != 0) {
				/*
				 * MPEG-1: sfbs 0-7 long block, 3-12 short blocks MPEG-2(.5):
				 * sfbs 0-5 long block, 3-12 short blocks
				 */
				cod_info.sfb_smin = 3;
				cod_info.sfb_lmax = gfc.mode_gr * 2 + 4;
			}
			cod_info.psymax = cod_info.sfb_lmax
					+ 3
					* ((gfc.sfb21_extra ? Encoder.SBMAX_s : Encoder.SBPSY_s) - cod_info.sfb_smin);
			cod_info.sfbmax = cod_info.sfb_lmax + 3
					* (Encoder.SBPSY_s - cod_info.sfb_smin);
			cod_info.sfbdivide = cod_info.sfbmax - 18;
			cod_info.psy_lmax = cod_info.sfb_lmax;
			/* re-order the short blocks, for more efficient encoding below */
			/* By Takehiro TOMINAGA */
			/*
			 * Within each scalefactor band, data is given for successive time
			 * windows, beginning with window 0 and ending with window 2. Within
			 * each window, the quantized values are then arranged in order of
			 * increasing frequency...
			 */
			int ix = gfc.scalefac_band.l[cod_info.sfb_lmax];
			System.arraycopy(cod_info.xr, 0, ixwork, 0, 576);
			for (int sfb = cod_info.sfb_smin; sfb < Encoder.SBMAX_s; sfb++) {
				final int start = gfc.scalefac_band.s[sfb];
				final int end = gfc.scalefac_band.s[sfb + 1];
				for (int window = 0; window < 3; window++) {
					for (int l = start; l < end; l++) {
						cod_info.xr[ix++] = ixwork[3 * l + window];
					}
				}
			}

			int j = cod_info.sfb_lmax;
			for (int sfb = cod_info.sfb_smin; sfb < Encoder.SBMAX_s; sfb++) {
				cod_info.width[j] = cod_info.width[j + 1] = cod_info.width[j + 2] = gfc.scalefac_band.s[sfb + 1]
						- gfc.scalefac_band.s[sfb];
				cod_info.window[j] = 0;
				cod_info.window[j + 1] = 1;
				cod_info.window[j + 2] = 2;
				j += 3;
			}
		}

		cod_info.count1bits = 0;
		cod_info.sfb_partition_table = qupvt.nr_of_sfb_block[0][0];
		cod_info.slen[0] = 0;
		cod_info.slen[1] = 0;
		cod_info.slen[2] = 0;
		cod_info.slen[3] = 0;

		cod_info.max_nonzero_coeff = 575;

		/*
		 * fresh scalefactors are all zero
		 */
		Arrays.fill(cod_info.scalefac, 0);

		psfb21_analogsilence(gfc, cod_info);
	}

	private enum BinSearchDirection {
		BINSEARCH_NONE, BINSEARCH_UP, BINSEARCH_DOWN
	}

	/**
	 * author/date??
	 * 
	 * binary step size search used by outer_loop to get a quantizer step size
	 * to start with
	 */
	private int bin_search_StepSize(final LameInternalFlags gfc,
			final GrInfo cod_info, int desired_rate, final int ch,
			final float xrpow[]) {
		int nBits;
		int CurrentStep = gfc.CurrentStep[ch];
		boolean flagGoneOver = false;
		final int start = gfc.OldValue[ch];
		BinSearchDirection Direction = BinSearchDirection.BINSEARCH_NONE;
		cod_info.global_gain = start;
		desired_rate -= cod_info.part2_length;

		assert (CurrentStep != 0);
		for (;;) {
			int step;
			nBits = tk.count_bits(gfc, xrpow, cod_info, null);

			if (CurrentStep == 1 || nBits == desired_rate)
				break; /* nothing to adjust anymore */

			if (nBits > desired_rate) {
				/* increase Quantize_StepSize */
				if (Direction == BinSearchDirection.BINSEARCH_DOWN)
					flagGoneOver = true;

				if (flagGoneOver)
					CurrentStep /= 2;
				Direction = BinSearchDirection.BINSEARCH_UP;
				step = CurrentStep;
			} else {
				/* decrease Quantize_StepSize */
				if (Direction == BinSearchDirection.BINSEARCH_UP)
					flagGoneOver = true;

				if (flagGoneOver)
					CurrentStep /= 2;
				Direction = BinSearchDirection.BINSEARCH_DOWN;
				step = -CurrentStep;
			}
			cod_info.global_gain += step;
			if (cod_info.global_gain < 0) {
				cod_info.global_gain = 0;
				flagGoneOver = true;
			}
			if (cod_info.global_gain > 255) {
				cod_info.global_gain = 255;
				flagGoneOver = true;
			}
		}

		assert (cod_info.global_gain >= 0);
		assert (cod_info.global_gain < 256);

		while (nBits > desired_rate && cod_info.global_gain < 255) {
			cod_info.global_gain++;
			nBits = tk.count_bits(gfc, xrpow, cod_info, null);
		}
		gfc.CurrentStep[ch] = (start - cod_info.global_gain >= 4) ? 4 : 2;
		gfc.OldValue[ch] = cod_info.global_gain;
		cod_info.part2_3_length = nBits;
		return nBits;
	}

	public final void trancate_smallspectrums(final LameInternalFlags gfc,
			final GrInfo gi, final float[] l3_xmin, final float[] work) {
		float distort[] = new float[L3Side.SFBMAX];

		if ((0 == (gfc.substep_shaping & 4) && gi.block_type == Encoder.SHORT_TYPE)
				|| (gfc.substep_shaping & 0x80) != 0)
			return;
		qupvt.calc_noise(gi, l3_xmin, distort, new CalcNoiseResult(), null);
		for (int j = 0; j < 576; j++) {
			float xr = 0.0f;
			if (gi.l3_enc[j] != 0)
				xr = Math.abs(gi.xr[j]);
			work[j] = xr;
		}

		int j = 0;
		int sfb = 8;
		if (gi.block_type == Encoder.SHORT_TYPE)
			sfb = 6;
		do {
			float allowedNoise, trancateThreshold;
			int nsame, start;

			int width = gi.width[sfb];
			j += width;
			if (distort[sfb] >= 1.0)
				continue;

			Arrays.sort(work, j - width, width);
			if (BitStream.EQ(work[j - 1], 0.0f))
				continue; /* all zero sfb */

			allowedNoise = (1.0f - distort[sfb]) * l3_xmin[sfb];
			trancateThreshold = 0.0f;
			start = 0;
			do {
				float noise;
				for (nsame = 1; start + nsame < width; nsame++)
					if (BitStream.NEQ(work[start + j - width], work[start + j
							+ nsame - width]))
						break;

				noise = work[start + j - width] * work[start + j - width]
						* nsame;
				if (allowedNoise < noise) {
					if (start != 0)
						trancateThreshold = work[start + j - width - 1];
					break;
				}
				allowedNoise -= noise;
				start += nsame;
			} while (start < width);
			if (BitStream.EQ(trancateThreshold, 0.0f))
				continue;

			do {
				if (Math.abs(gi.xr[j - width]) <= trancateThreshold)
					gi.l3_enc[j - width] = 0;
			} while (--width > 0);
		} while (++sfb < gi.psymax);

		gi.part2_3_length = tk.noquant_count_bits(gfc, gi, null);
	}

	/**
	 * author/date??
	 * 
	 * Function: Returns zero if there is a scalefac which has not been
	 * amplified. Otherwise it returns one.
	 */
	private boolean loop_break(final GrInfo cod_info) {
		for (int sfb = 0; sfb < cod_info.sfbmax; sfb++)
			if (cod_info.scalefac[sfb]
					+ cod_info.subblock_gain[cod_info.window[sfb]] == 0)
				return false;

		return true;
	}

	/* mt 5/99: Function: Improved calc_noise for a single channel */

	private double penalties(final double noise) {
		return Util.FAST_LOG10((float) (0.368 + 0.632 * noise * noise * noise));
	}

	/**
	 * author/date??
	 * 
	 * several different codes to decide which quantization is better
	 */
	private double get_klemm_noise(final float[] distort, final GrInfo gi) {
		double klemm_noise = 1E-37;
		for (int sfb = 0; sfb < gi.psymax; sfb++)
			klemm_noise += penalties(distort[sfb]);

		return Math.max(1e-20, klemm_noise);
	}

	private boolean quant_compare(final int quant_comp,
			final CalcNoiseResult best, final CalcNoiseResult calc,
			final GrInfo gi, final float[] distort) {
		/**
		 * noise is given in decibels (dB) relative to masking thesholds.<BR>
		 * 
		 * over_noise: ??? (the previous comment is fully wrong)<BR>
		 * tot_noise: ??? (the previous comment is fully wrong)<BR>
		 * max_noise: max quantization noise
		 */
		boolean better;

		switch (quant_comp) {
		default:
		case 9: {
			if (best.over_count > 0) {
				/* there are distorted sfb */
				better = calc.over_SSD <= best.over_SSD;
				if (calc.over_SSD == best.over_SSD)
					better = calc.bits < best.bits;
			} else {
				/* no distorted sfb */
				better = ((calc.max_noise < 0) && ((calc.max_noise * 10 + calc.bits) <= (best.max_noise * 10 + best.bits)));
			}
			break;
		}

		case 0:
			better = calc.over_count < best.over_count
					|| (calc.over_count == best.over_count && calc.over_noise < best.over_noise)
					|| (calc.over_count == best.over_count
							&& BitStream.EQ(calc.over_noise, best.over_noise) && calc.tot_noise < best.tot_noise);
			break;

		case 8:
			calc.max_noise = (float) get_klemm_noise(distort, gi);
			//$FALL-THROUGH$
		case 1:
			better = calc.max_noise < best.max_noise;
			break;
		case 2:
			better = calc.tot_noise < best.tot_noise;
			break;
		case 3:
			better = (calc.tot_noise < best.tot_noise)
					&& (calc.max_noise < best.max_noise);
			break;
		case 4:
			better = (calc.max_noise <= 0.0 && best.max_noise > 0.2)
					|| (calc.max_noise <= 0.0 && best.max_noise < 0.0
							&& best.max_noise > calc.max_noise - 0.2 && calc.tot_noise < best.tot_noise)
					|| (calc.max_noise <= 0.0 && best.max_noise > 0.0
							&& best.max_noise > calc.max_noise - 0.2 && calc.tot_noise < best.tot_noise
							+ best.over_noise)
					|| (calc.max_noise > 0.0 && best.max_noise > -0.05
							&& best.max_noise > calc.max_noise - 0.1 && calc.tot_noise
							+ calc.over_noise < best.tot_noise
							+ best.over_noise)
					|| (calc.max_noise > 0.0 && best.max_noise > -0.1
							&& best.max_noise > calc.max_noise - 0.15 && calc.tot_noise
							+ calc.over_noise + calc.over_noise < best.tot_noise
							+ best.over_noise + best.over_noise);
			break;
		case 5:
			better = calc.over_noise < best.over_noise
					|| (BitStream.EQ(calc.over_noise, best.over_noise) && calc.tot_noise < best.tot_noise);
			break;
		case 6:
			better = calc.over_noise < best.over_noise
					|| (BitStream.EQ(calc.over_noise, best.over_noise) && (calc.max_noise < best.max_noise || (BitStream
							.EQ(calc.max_noise, best.max_noise) && calc.tot_noise <= best.tot_noise)));
			break;
		case 7:
			better = calc.over_count < best.over_count
					|| calc.over_noise < best.over_noise;
			break;
		}

		if (best.over_count == 0) {
			/*
			 * If no distorted bands, only use this quantization if it is
			 * better, and if it uses less bits. Unfortunately, part2_3_length
			 * is sometimes a poor estimator of the final size at low bitrates.
			 */
			better = better && calc.bits < best.bits;
		}

		return better;
	}

	/**
	 * author/date??
	 * 
	 * <PRE>
	 *  Amplify the scalefactor bands that violate the masking threshold.
	 *  See ISO 11172-3 Section C.1.5.4.3.5
	 * 
	 *  distort[] = noise/masking
	 *  distort[] > 1   ==> noise is not masked
	 *  distort[] < 1   ==> noise is masked
	 *  max_dist = maximum value of distort[]
	 * 
	 *  Three algorithms:
	 *  noise_shaping_amp
	 *        0             Amplify all bands with distort[]>1.
	 * 
	 *        1             Amplify all bands with distort[] >= max_dist^(.5);
	 *                     ( 50% in the db scale)
	 * 
	 *        2             Amplify first band with distort[] >= max_dist;
	 * 
	 * 
	 *  For algorithms 0 and 1, if max_dist < 1, then amplify all bands
	 *  with distort[] >= .95*max_dist.  This is to make sure we always
	 *  amplify at least one band.
	 * </PRE>
	 */
	private void amp_scalefac_bands(final LameGlobalFlags gfp,
			final GrInfo cod_info, final float[] distort,
			final float xrpow[], final boolean bRefine) {
		final LameInternalFlags gfc = gfp.internal_flags;
		float ifqstep34;

		if (cod_info.scalefac_scale == 0) {
			ifqstep34 = 1.29683955465100964055f; /* 2**(.75*.5) */
		} else {
			ifqstep34 = 1.68179283050742922612f; /* 2**(.75*1) */
		}

		/* compute maximum value of distort[] */
		float trigger = 0;
		for (int sfb = 0; sfb < cod_info.sfbmax; sfb++) {
			if (trigger < distort[sfb])
				trigger = distort[sfb];
		}

		int noise_shaping_amp = gfc.noise_shaping_amp;
		if (noise_shaping_amp == 3) {
			if (bRefine)
				noise_shaping_amp = 2;
			else
				noise_shaping_amp = 1;
		}
		switch (noise_shaping_amp) {
		case 2:
			/* amplify exactly 1 band */
			break;

		case 1:
			/* amplify bands within 50% of max (on db scale) */
			if (trigger > 1.0)
				trigger = (float) Math.pow(trigger, .5);
			else
				trigger *= .95;
			break;

		case 0:
		default:
			/* ISO algorithm. amplify all bands with distort>1 */
			if (trigger > 1.0)
				trigger = 1.0f;
			else
				trigger *= .95;
			break;
		}

		int j = 0;
		for (int sfb = 0; sfb < cod_info.sfbmax; sfb++) {
			final int width = cod_info.width[sfb];
			int l;
			j += width;
			if (distort[sfb] < trigger)
				continue;

			if ((gfc.substep_shaping & 2) != 0) {
				gfc.pseudohalf[sfb] = (0 == gfc.pseudohalf[sfb]) ? 1 : 0;
				if (0 == gfc.pseudohalf[sfb] && gfc.noise_shaping_amp == 2)
					return;
			}
			cod_info.scalefac[sfb]++;
			for (l = -width; l < 0; l++) {
				xrpow[j + l] *= ifqstep34;
				if (xrpow[j + l] > cod_info.xrpow_max)
					cod_info.xrpow_max = xrpow[j + l];
			}

			if (gfc.noise_shaping_amp == 2)
				return;
		}
	}

	/**
	 * Takehiro Tominaga 2000-xx-xx
	 * 
	 * turns on scalefac scale and adjusts scalefactors
	 */
	private void inc_scalefac_scale(final GrInfo cod_info, float xrpow[]) {
		final float ifqstep34 = 1.29683955465100964055f;

		int j = 0;
		for (int sfb = 0; sfb < cod_info.sfbmax; sfb++) {
			final int width = cod_info.width[sfb];
			int s = cod_info.scalefac[sfb];
			if (cod_info.preflag != 0)
				s += qupvt.pretab[sfb];
			j += width;
			if ((s & 1) != 0) {
				s++;
				for (int l = -width; l < 0; l++) {
					xrpow[j + l] *= ifqstep34;
					if (xrpow[j + l] > cod_info.xrpow_max)
						cod_info.xrpow_max = xrpow[j + l];
				}
			}
			cod_info.scalefac[sfb] = s >> 1;
		}
		cod_info.preflag = 0;
		cod_info.scalefac_scale = 1;
	}

	/**
	 * Takehiro Tominaga 2000-xx-xx
	 * 
	 * increases the subblock gain and adjusts scalefactors
	 */
	private boolean inc_subblock_gain(final LameInternalFlags gfc,
			final GrInfo cod_info, float xrpow[]) {
		int sfb;
		final int[] scalefac = cod_info.scalefac;

		/* subbloc_gain can't do anything in the long block region */
		for (sfb = 0; sfb < cod_info.sfb_lmax; sfb++) {
			if (scalefac[sfb] >= 16)
				return true;
		}

		for (int window = 0; window < 3; window++) {
			int s1 = 0;
			int s2 = 0;

			for (sfb = cod_info.sfb_lmax + window; sfb < cod_info.sfbdivide; sfb += 3) {
				if (s1 < scalefac[sfb])
					s1 = scalefac[sfb];
			}
			for (; sfb < cod_info.sfbmax; sfb += 3) {
				if (s2 < scalefac[sfb])
					s2 = scalefac[sfb];
			}

			if (s1 < 16 && s2 < 8)
				continue;

			if (cod_info.subblock_gain[window] >= 7)
				return true;

			/*
			 * even though there is no scalefactor for sfb12 subblock gain
			 * affects upper frequencies too, that's why we have to go up to
			 * SBMAX_s
			 */
			cod_info.subblock_gain[window]++;
			int j = gfc.scalefac_band.l[cod_info.sfb_lmax];
			for (sfb = cod_info.sfb_lmax + window; sfb < cod_info.sfbmax; sfb += 3) {
				float amp;
				final int width = cod_info.width[sfb];
				int s = scalefac[sfb];
				assert (s >= 0);
				s = s - (4 >> cod_info.scalefac_scale);
				if (s >= 0) {
					scalefac[sfb] = s;
					j += width * 3;
					continue;
				}

				scalefac[sfb] = 0;
				{
					final int gain = 210 + (s << (cod_info.scalefac_scale + 1));
					amp = qupvt.IPOW20(gain);
				}
				j += width * (window + 1);
				for (int l = -width; l < 0; l++) {
					xrpow[j + l] *= amp;
					if (xrpow[j + l] > cod_info.xrpow_max)
						cod_info.xrpow_max = xrpow[j + l];
				}
				j += width * (3 - window - 1);
			}

			{
				final float amp = qupvt.IPOW20(202);
				j += cod_info.width[sfb] * (window + 1);
				for (int l = -cod_info.width[sfb]; l < 0; l++) {
					xrpow[j + l] *= amp;
					if (xrpow[j + l] > cod_info.xrpow_max)
						cod_info.xrpow_max = xrpow[j + l];
				}
			}
		}
		return false;
	}

	/**
	 * <PRE>
	 *  Takehiro Tominaga /date??
	 *  Robert Hegemann 2000-09-06: made a function of it
	 * 
	 *  amplifies scalefactor bands,
	 *   - if all are already amplified returns 0
	 *   - if some bands are amplified too much:
	 *      * try to increase scalefac_scale
	 *      * if already scalefac_scale was set
	 *          try on short blocks to increase subblock gain
	 * </PRE>
	 */
	private boolean balance_noise(final LameGlobalFlags gfp,
			final GrInfo cod_info, final float[] distort, float xrpow[],
			final boolean bRefine) {
		final LameInternalFlags gfc = gfp.internal_flags;

		amp_scalefac_bands(gfp, cod_info, distort, xrpow, bRefine);

		/*
		 * check to make sure we have not amplified too much loop_break returns
		 * 0 if there is an unamplified scalefac scale_bitcount returns 0 if no
		 * scalefactors are too large
		 */

		boolean status = loop_break(cod_info);

		if (status)
			return false; /* all bands amplified */

		/*
		 * not all scalefactors have been amplified. so these scalefacs are
		 * possibly valid. encode them:
		 */
		if (gfc.mode_gr == 2)
			status = tk.scale_bitcount(cod_info);
		else
			status = tk.scale_bitcount_lsf(gfc, cod_info);

		if (!status)
			return true; /* amplified some bands not exceeding limits */

		/*
		 * some scalefactors are too large. lets try setting scalefac_scale=1
		 */
		if (gfc.noise_shaping > 1) {
			Arrays.fill(gfc.pseudohalf, 0);
			if (0 == cod_info.scalefac_scale) {
				inc_scalefac_scale(cod_info, xrpow);
				status = false;
			} else {
				if (cod_info.block_type == Encoder.SHORT_TYPE
						&& gfc.subblock_gain > 0) {
					status = (inc_subblock_gain(gfc, cod_info, xrpow) || loop_break(cod_info));
				}
			}
		}

		if (!status) {
			if (gfc.mode_gr == 2)
				status = tk.scale_bitcount(cod_info);
			else
				status = tk.scale_bitcount_lsf(gfc, cod_info);
		}
		return !status;
	}

	/**
	 * <PRE>
	 *  Function: The outer iteration loop controls the masking conditions
	 *  of all scalefactorbands. It computes the best scalefac and
	 *  global gain. This module calls the inner iteration loop
	 * 
	 *  mt 5/99 completely rewritten to allow for bit reservoir control,
	 *  mid/side channels with L/R or mid/side masking thresholds,
	 *  and chooses best quantization instead of last quantization when
	 *  no distortion free quantization can be found.
	 * 
	 *  added VBR support mt 5/99
	 * 
	 *  some code shuffle rh 9/00
	 * </PRE>
	 * 
	 * @param l3_xmin
	 *            allowed distortion
	 * @param xrpow
	 *            coloured magnitudes of spectral
	 * @param targ_bits
	 *            maximum allowed bits
	 */
	public final int outer_loop(final LameGlobalFlags gfp,
			final GrInfo cod_info, final float[] l3_xmin, float xrpow[],
			final int ch, final int targ_bits) {
		final LameInternalFlags gfc = gfp.internal_flags;
		GrInfo cod_info_w = new GrInfo();
		float save_xrpow[] = new float[576];
		float distort[] = new float[L3Side.SFBMAX];
		CalcNoiseResult best_noise_info = new CalcNoiseResult();
		int better;
		CalcNoiseData prev_noise = new CalcNoiseData();
		int best_part2_3_length = 9999999;
		boolean bEndOfSearch = false;
		boolean bRefine = false;
		int best_ggain_pass1 = 0;

		bin_search_StepSize(gfc, cod_info, targ_bits, ch, xrpow);

		if (0 == gfc.noise_shaping)
			/* fast mode, no noise shaping, we are ready */
			return 100; /* default noise_info.over_count */

		/* compute the distortion in this quantization */
		/* coefficients and thresholds both l/r (or both mid/side) */
		qupvt.calc_noise(cod_info, l3_xmin, distort, best_noise_info,
				prev_noise);
		best_noise_info.bits = cod_info.part2_3_length;

		cod_info_w.assign(cod_info);
		int age = 0;
		System.arraycopy(xrpow, 0, save_xrpow, 0, 576);

		while (!bEndOfSearch) {
			/* BEGIN MAIN LOOP */
			do {
				CalcNoiseResult noise_info = new CalcNoiseResult();
				int search_limit;
				int maxggain = 255;

				/*
				 * When quantization with no distorted bands is found, allow up
				 * to X new unsuccesful tries in serial. This gives us more
				 * possibilities for different quant_compare modes. Much more
				 * than 3 makes not a big difference, it is only slower.
				 */

				if ((gfc.substep_shaping & 2) != 0) {
					search_limit = 20;
				} else {
					search_limit = 3;
				}

				/*
				 * Check if the last scalefactor band is distorted. in VBR mode
				 * we can't get rid of the distortion, so quit now and VBR mode
				 * will try again with more bits. (makes a 10% speed increase,
				 * the files I tested were binary identical, 2000/05/20 Robert
				 * Hegemann) distort[] > 1 means noise > allowed noise
				 */
				if (gfc.sfb21_extra) {
					if (distort[cod_info_w.sfbmax] > 1.0)
						break;
					if (cod_info_w.block_type == Encoder.SHORT_TYPE
							&& (distort[cod_info_w.sfbmax + 1] > 1.0 || distort[cod_info_w.sfbmax + 2] > 1.0))
						break;
				}

				/* try a new scalefactor conbination on cod_info_w */
				if (!balance_noise(gfp, cod_info_w, distort, xrpow, bRefine))
					break;
				if (cod_info_w.scalefac_scale != 0)
					maxggain = 254;

				/*
				 * inner_loop starts with the initial quantization step computed
				 * above and slowly increases until the bits < huff_bits. Thus
				 * it is important not to start with too large of an inital
				 * quantization step. Too small is ok, but inner_loop will take
				 * longer
				 */
				int huff_bits = targ_bits - cod_info_w.part2_length;
				if (huff_bits <= 0)
					break;

				/*
				 * increase quantizer stepsize until needed bits are below
				 * maximum
				 */
				while ((cod_info_w.part2_3_length = tk.count_bits(gfc, xrpow,
						cod_info_w, prev_noise)) > huff_bits
						&& cod_info_w.global_gain <= maxggain)
					cod_info_w.global_gain++;

				if (cod_info_w.global_gain > maxggain)
					break;

				if (best_noise_info.over_count == 0) {

					while ((cod_info_w.part2_3_length = tk.count_bits(gfc,
							xrpow, cod_info_w, prev_noise)) > best_part2_3_length
							&& cod_info_w.global_gain <= maxggain)
						cod_info_w.global_gain++;

					if (cod_info_w.global_gain > maxggain)
						break;
				}

				/* compute the distortion in this quantization */
				qupvt.calc_noise(cod_info_w, l3_xmin, distort, noise_info,
						prev_noise);
				noise_info.bits = cod_info_w.part2_3_length;

				/*
				 * check if this quantization is better than our saved
				 * quantization
				 */
				if (cod_info.block_type != Encoder.SHORT_TYPE) {
					// NORM, START or STOP type
					better = gfp.quant_comp;
				} else
					better = gfp.quant_comp_short;

				better = quant_compare(better, best_noise_info, noise_info,
						cod_info_w, distort) ? 1 : 0;

				/* save data so we can restore this quantization later */
				if (better != 0) {
					best_part2_3_length = cod_info.part2_3_length;
					best_noise_info = noise_info;
					cod_info.assign(cod_info_w);
					age = 0;
					/* save data so we can restore this quantization later */
					/* store for later reuse */
					System.arraycopy(xrpow, 0, save_xrpow, 0, 576);
				} else {
					/* early stop? */
					if (gfc.full_outer_loop == 0) {
						if (++age > search_limit
								&& best_noise_info.over_count == 0)
							break;
						if ((gfc.noise_shaping_amp == 3) && bRefine && age > 30)
							break;
						if ((gfc.noise_shaping_amp == 3)
								&& bRefine
								&& (cod_info_w.global_gain - best_ggain_pass1) > 15)
							break;
					}
				}
			} while ((cod_info_w.global_gain + cod_info_w.scalefac_scale) < 255);

			if (gfc.noise_shaping_amp == 3) {
				if (!bRefine) {
					/* refine search */
					cod_info_w.assign(cod_info);
					System.arraycopy(save_xrpow, 0, xrpow, 0, 576);
					age = 0;
					best_ggain_pass1 = cod_info_w.global_gain;

					bRefine = true;
				} else {
					/* search already refined, stop */
					bEndOfSearch = true;
				}

			} else {
				bEndOfSearch = true;
			}
		}

		assert ((cod_info.global_gain + cod_info.scalefac_scale) <= 255);
		/*
		 * finish up
		 */
		if (gfp.VBR == VbrMode.vbr_rh || gfp.VBR == VbrMode.vbr_mtrh)
			/* restore for reuse on next try */
			System.arraycopy(save_xrpow, 0, xrpow, 0, 576);
		/*
		 * do the 'substep shaping'
		 */
		else if ((gfc.substep_shaping & 1) != 0)
			trancate_smallspectrums(gfc, cod_info, l3_xmin, xrpow);

		return best_noise_info.over_count;
	}

	/**
	 * Robert Hegemann 2000-09-06
	 * 
	 * update reservoir status after FINAL quantization/bitrate
	 */
	public final void iteration_finish_one(final LameInternalFlags gfc,
			final int gr, final int ch) {
		final IIISideInfo l3_side = gfc.l3_side;
		final GrInfo cod_info = l3_side.tt[gr][ch];

		/*
		 * try some better scalefac storage
		 */
		tk.best_scalefac_store(gfc, gr, ch, l3_side);

		/*
		 * best huffman_divide may save some bits too
		 */
		if (gfc.use_best_huffman == 1)
			tk.best_huffman_divide(gfc, cod_info);

		/*
		 * update reservoir status after FINAL quantization/bitrate
		 */
		rv.ResvAdjust(gfc, cod_info);
	}

	/**
	 * 
	 * 2000-09-04 Robert Hegemann
	 * 
	 * @param l3_xmin
	 *            allowed distortion of the scalefactor
	 * @param xrpow
	 *            coloured magnitudes of spectral values
	 */
	public final void VBR_encode_granule(final LameGlobalFlags gfp,
			GrInfo cod_info, final float[] l3_xmin, float xrpow[],
			final int ch, int min_bits, int max_bits) {
		final LameInternalFlags gfc = gfp.internal_flags;
		GrInfo bst_cod_info = new GrInfo();
		float bst_xrpow[] = new float[576];
		final int Max_bits = max_bits;
		int real_bits = max_bits + 1;
		int this_bits = (max_bits + min_bits) / 2;
		int dbits, over, found = 0;
		final boolean sfb21_extra = gfc.sfb21_extra;

		assert (Max_bits <= LameInternalFlags.MAX_BITS_PER_CHANNEL);
		Arrays.fill(bst_cod_info.l3_enc, 0);

		/*
		 * search within round about 40 bits of optimal
		 */
		do {
			assert (this_bits >= min_bits);
			assert (this_bits <= max_bits);
			assert (min_bits <= max_bits);

			if (this_bits > Max_bits - 42)
				gfc.sfb21_extra = false;
			else
				gfc.sfb21_extra = sfb21_extra;

			over = outer_loop(gfp, cod_info, l3_xmin, xrpow, ch, this_bits);

			/*
			 * is quantization as good as we are looking for ? in this case: is
			 * no scalefactor band distorted?
			 */
			if (over <= 0) {
				found = 1;
				/*
				 * now we know it can be done with "real_bits" and maybe we can
				 * skip some iterations
				 */
				real_bits = cod_info.part2_3_length;

				/*
				 * store best quantization so far
				 */
				bst_cod_info.assign(cod_info);
				System.arraycopy(xrpow, 0, bst_xrpow, 0, 576);

				/*
				 * try with fewer bits
				 */
				max_bits = real_bits - 32;
				dbits = max_bits - min_bits;
				this_bits = (max_bits + min_bits) / 2;
			} else {
				/*
				 * try with more bits
				 */
				min_bits = this_bits + 32;
				dbits = max_bits - min_bits;
				this_bits = (max_bits + min_bits) / 2;

				if (found != 0) {
					found = 2;
					/*
					 * start again with best quantization so far
					 */
					cod_info.assign(bst_cod_info);
					System.arraycopy(bst_xrpow, 0, xrpow, 0, 576);
				}
			}
		} while (dbits > 12);

		gfc.sfb21_extra = sfb21_extra;

		/*
		 * found=0 => nothing found, use last one found=1 => we just found the
		 * best and left the loop found=2 => we restored a good one and have now
		 * l3_enc to restore too
		 */
		if (found == 2) {
			System.arraycopy(bst_cod_info.l3_enc, 0, cod_info.l3_enc, 0, 576);
		}
		assert (cod_info.part2_3_length <= Max_bits);
	}

	/**
	 * Robert Hegemann 2000-09-05
	 * 
	 * calculates * how many bits are available for analog silent granules * how
	 * many bits to use for the lowest allowed bitrate * how many bits each
	 * bitrate would provide
	 */
	public final void get_framebits(final LameGlobalFlags gfp,
			final int frameBits[]) {
		final LameInternalFlags gfc = gfp.internal_flags;

		/*
		 * always use at least this many bits per granule per channel unless we
		 * detect analog silence, see below
		 */
		gfc.bitrate_index = gfc.VBR_min_bitrate;
		int bitsPerFrame = bs.getframebits(gfp);

		/*
		 * bits for analog silence
		 */
		gfc.bitrate_index = 1;
		bitsPerFrame = bs.getframebits(gfp);

		for (int i = 1; i <= gfc.VBR_max_bitrate; i++) {
			gfc.bitrate_index = i;
			MeanBits mb = new MeanBits(bitsPerFrame);
			frameBits[i] = rv.ResvFrameBegin(gfp, mb);
			bitsPerFrame = mb.bits;
		}
	}

	/* RH: this one needs to be overhauled sometime */

	/**
	 * <PRE>
	 *  2000-09-04 Robert Hegemann
	 * 
	 *  * converts LR to MS coding when necessary
	 *  * calculates allowed/adjusted quantization noise amounts
	 *  * detects analog silent frames
	 * 
	 *  some remarks:
	 *  - lower masking depending on Quality setting
	 *  - quality control together with adjusted ATH MDCT scaling
	 *    on lower quality setting allocate more noise from
	 *    ATH masking, and on higher quality setting allocate
	 *    less noise from ATH masking.
	 *  - experiments show that going more than 2dB over GPSYCHO's
	 *    limits ends up in very annoying artefacts
	 * </PRE>
	 */
	public final int VBR_old_prepare(final LameGlobalFlags gfp, float pe[][],
			final float ms_ener_ratio[], final III_psy_ratio ratio[][],
			float l3_xmin[][][], final int frameBits[], final int min_bits[][],
			final int max_bits[][], final int bands[][]) {
		final LameInternalFlags gfc = gfp.internal_flags;

		float masking_lower_db, adjust = 0.0f;
		int analog_silence = 1;
		int bits = 0;

		gfc.bitrate_index = gfc.VBR_max_bitrate;
		int avg = rv.ResvFrameBegin(gfp, new MeanBits(0)) / gfc.mode_gr;

		get_framebits(gfp, frameBits);

		for (int gr = 0; gr < gfc.mode_gr; gr++) {
			int mxb = qupvt.on_pe(gfp, pe, max_bits[gr], avg, gr, 0);
			if (gfc.mode_ext == Encoder.MPG_MD_MS_LR) {
				ms_convert(gfc.l3_side, gr);
				qupvt.reduce_side(max_bits[gr], ms_ener_ratio[gr], avg, mxb);
			}
			for (int ch = 0; ch < gfc.channels_out; ++ch) {
				final GrInfo cod_info = gfc.l3_side.tt[gr][ch];

				if (cod_info.block_type != Encoder.SHORT_TYPE) {
					// NORM, START or STOP type
					adjust = 1.28f / (1 + (float) Math
							.exp(3.5 - pe[gr][ch] / 300.)) - 0.05f;
					masking_lower_db = gfc.PSY.mask_adjust - adjust;
				} else {
					adjust = 2.56f / (1 + (float) Math
							.exp(3.5 - pe[gr][ch] / 300.)) - 0.14f;
					masking_lower_db = gfc.PSY.mask_adjust_short - adjust;
				}
				gfc.masking_lower = (float) Math.pow(10.0,
						masking_lower_db * 0.1);

				init_outer_loop(gfc, cod_info);
				bands[gr][ch] = qupvt.calc_xmin(gfp, ratio[gr][ch], cod_info,
						l3_xmin[gr][ch]);
				if (bands[gr][ch] != 0)
					analog_silence = 0;

				min_bits[gr][ch] = 126;

				bits += max_bits[gr][ch];
			}
		}
		for (int gr = 0; gr < gfc.mode_gr; gr++) {
			for (int ch = 0; ch < gfc.channels_out; ch++) {
				if (bits > frameBits[gfc.VBR_max_bitrate]) {
					max_bits[gr][ch] *= frameBits[gfc.VBR_max_bitrate];
					max_bits[gr][ch] /= bits;
				}
				if (min_bits[gr][ch] > max_bits[gr][ch])
					min_bits[gr][ch] = max_bits[gr][ch];

			} /* for ch */
		} /* for gr */

		return analog_silence;
	}

	public final void bitpressure_strategy(final LameInternalFlags gfc,
			float l3_xmin[][][], final int min_bits[][], final int max_bits[][]) {
		for (int gr = 0; gr < gfc.mode_gr; gr++) {
			for (int ch = 0; ch < gfc.channels_out; ch++) {
				final GrInfo gi = gfc.l3_side.tt[gr][ch];
				float[] pxmin = l3_xmin[gr][ch];
				int pxminPos = 0;
				for (int sfb = 0; sfb < gi.psy_lmax; sfb++)
					pxmin[pxminPos++] *= 1. + .029 * sfb * sfb
							/ Encoder.SBMAX_l / Encoder.SBMAX_l;

				if (gi.block_type == Encoder.SHORT_TYPE) {
					for (int sfb = gi.sfb_smin; sfb < Encoder.SBMAX_s; sfb++) {
						pxmin[pxminPos++] *= 1. + .029 * sfb * sfb
								/ Encoder.SBMAX_s / Encoder.SBMAX_s;
						pxmin[pxminPos++] *= 1. + .029 * sfb * sfb
								/ Encoder.SBMAX_s / Encoder.SBMAX_s;
						pxmin[pxminPos++] *= 1. + .029 * sfb * sfb
								/ Encoder.SBMAX_s / Encoder.SBMAX_s;
					}
				}
				max_bits[gr][ch] = (int) Math.max(min_bits[gr][ch],
						0.9 * max_bits[gr][ch]);
			}
		}
	}

	public final int VBR_new_prepare(final LameGlobalFlags gfp, float pe[][],
			III_psy_ratio ratio[][], float l3_xmin[][][],
			final int frameBits[], final int max_bits[][]) {
		final LameInternalFlags gfc = gfp.internal_flags;

		int analog_silence = 1;
		int avg = 0, bits = 0;
		int maximum_framebits;

		if (!gfp.free_format) {
			gfc.bitrate_index = gfc.VBR_max_bitrate;

			MeanBits mb = new MeanBits(avg);
			rv.ResvFrameBegin(gfp, mb);
			avg = mb.bits;

			get_framebits(gfp, frameBits);
			maximum_framebits = frameBits[gfc.VBR_max_bitrate];
		} else {
			gfc.bitrate_index = 0;
			MeanBits mb = new MeanBits(avg);
			maximum_framebits = rv.ResvFrameBegin(gfp, mb);
			avg = mb.bits;
			frameBits[0] = maximum_framebits;
		}

		for (int gr = 0; gr < gfc.mode_gr; gr++) {
			qupvt.on_pe(gfp, pe, max_bits[gr], avg, gr, 0);
			if (gfc.mode_ext == Encoder.MPG_MD_MS_LR) {
				ms_convert(gfc.l3_side, gr);
			}
			for (int ch = 0; ch < gfc.channels_out; ++ch) {
				final GrInfo cod_info = gfc.l3_side.tt[gr][ch];

				gfc.masking_lower = (float) Math.pow(10.0,
						gfc.PSY.mask_adjust * 0.1);

				init_outer_loop(gfc, cod_info);
				if (0 != qupvt.calc_xmin(gfp, ratio[gr][ch], cod_info,
						l3_xmin[gr][ch]))
					analog_silence = 0;

				bits += max_bits[gr][ch];
			}
		}
		for (int gr = 0; gr < gfc.mode_gr; gr++) {
			for (int ch = 0; ch < gfc.channels_out; ch++) {
				if (bits > maximum_framebits) {
					max_bits[gr][ch] *= maximum_framebits;
					max_bits[gr][ch] /= bits;
				}

			} /* for ch */
		} /* for gr */

		return analog_silence;
	}

	/**
	 * calculates target bits for ABR encoding
	 * 
	 * mt 2000/05/31
	 */
	public final void calc_target_bits(final LameGlobalFlags gfp, float pe[][],
			final float ms_ener_ratio[], final int targ_bits[][],
			final int[] analog_silence_bits, final int[] max_frame_bits) {
		final LameInternalFlags gfc = gfp.internal_flags;
		final IIISideInfo l3_side = gfc.l3_side;
		float res_factor;
		int gr, ch, totbits, mean_bits = 0;

		gfc.bitrate_index = gfc.VBR_max_bitrate;
		MeanBits mb = new MeanBits(mean_bits);
		max_frame_bits[0] = rv.ResvFrameBegin(gfp, mb);
		mean_bits = mb.bits;

		gfc.bitrate_index = 1;
		mean_bits = bs.getframebits(gfp) - gfc.sideinfo_len * 8;
		analog_silence_bits[0] = mean_bits / (gfc.mode_gr * gfc.channels_out);

		mean_bits = gfp.VBR_mean_bitrate_kbps * gfp.framesize * 1000;
		if ((gfc.substep_shaping & 1) != 0)
			mean_bits *= 1.09;
		mean_bits /= gfp.out_samplerate;
		mean_bits -= gfc.sideinfo_len * 8;
		mean_bits /= (gfc.mode_gr * gfc.channels_out);

		/**
		 * <PRE>
		 * 	       res_factor is the percentage of the target bitrate that should
		 * 	       be used on average.  the remaining bits are added to the
		 * 	       bitreservoir and used for difficult to encode frames.
		 * 
		 * 	       Since we are tracking the average bitrate, we should adjust
		 * 	       res_factor "on the fly", increasing it if the average bitrate
		 * 	       is greater than the requested bitrate, and decreasing it
		 * 	       otherwise.  Reasonable ranges are from .9 to 1.0
		 * 
		 * 	       Until we get the above suggestion working, we use the following
		 * 	       tuning:
		 * 	       compression ratio    res_factor
		 * 	       5.5  (256kbps)         1.0      no need for bitreservoir
		 * 	       11   (128kbps)         .93      7% held for reservoir
		 * 
		 * 	       with linear interpolation for other values.
		 * </PRE>
		 */
		res_factor = .93f + .07f * (11.0f - gfp.compression_ratio)
				/ (11.0f - 5.5f);
		if (res_factor < .90)
			res_factor = .90f;
		if (res_factor > 1.00)
			res_factor = 1.00f;

		for (gr = 0; gr < gfc.mode_gr; gr++) {
			int sum = 0;
			for (ch = 0; ch < gfc.channels_out; ch++) {
				targ_bits[gr][ch] = (int) (res_factor * mean_bits);

				if (pe[gr][ch] > 700) {
					int add_bits = (int) ((pe[gr][ch] - 700) / 1.4);

					final GrInfo cod_info = l3_side.tt[gr][ch];
					targ_bits[gr][ch] = (int) (res_factor * mean_bits);

					/* short blocks use a little extra, no matter what the pe */
					if (cod_info.block_type == Encoder.SHORT_TYPE) {
						if (add_bits < mean_bits / 2)
							add_bits = mean_bits / 2;
					}
					/* at most increase bits by 1.5*average */
					if (add_bits > mean_bits * 3 / 2)
						add_bits = mean_bits * 3 / 2;
					else if (add_bits < 0)
						add_bits = 0;

					targ_bits[gr][ch] += add_bits;
				}
				if (targ_bits[gr][ch] > LameInternalFlags.MAX_BITS_PER_CHANNEL) {
					targ_bits[gr][ch] = LameInternalFlags.MAX_BITS_PER_CHANNEL;
				}
				sum += targ_bits[gr][ch];
			} /* for ch */
			if (sum > LameInternalFlags.MAX_BITS_PER_GRANULE) {
				for (ch = 0; ch < gfc.channels_out; ++ch) {
					targ_bits[gr][ch] *= LameInternalFlags.MAX_BITS_PER_GRANULE;
					targ_bits[gr][ch] /= sum;
				}
			}
		} /* for gr */

		if (gfc.mode_ext == Encoder.MPG_MD_MS_LR)
			for (gr = 0; gr < gfc.mode_gr; gr++) {
				qupvt.reduce_side(targ_bits[gr], ms_ener_ratio[gr], mean_bits
						* gfc.channels_out,
						LameInternalFlags.MAX_BITS_PER_GRANULE);
			}

		/*
		 * sum target bits
		 */
		totbits = 0;
		for (gr = 0; gr < gfc.mode_gr; gr++) {
			for (ch = 0; ch < gfc.channels_out; ch++) {
				if (targ_bits[gr][ch] > LameInternalFlags.MAX_BITS_PER_CHANNEL)
					targ_bits[gr][ch] = LameInternalFlags.MAX_BITS_PER_CHANNEL;
				totbits += targ_bits[gr][ch];
			}
		}

		/*
		 * repartion target bits if needed
		 */
		if (totbits > max_frame_bits[0]) {
			for (gr = 0; gr < gfc.mode_gr; gr++) {
				for (ch = 0; ch < gfc.channels_out; ch++) {
					targ_bits[gr][ch] *= max_frame_bits[0];
					targ_bits[gr][ch] /= totbits;
				}
			}
		}
	}

}