From 7039a05147b8bbfc829babea1c65bd436450b505 Mon Sep 17 00:00:00 2001 From: Björn Stenberg Date: Mon, 8 Jan 2007 23:53:00 +0000 Subject: Splitting out songdbj git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11953 a1c6a512-1295-4272-9138-f99709370657 --- songdbj/javazoom/jl/decoder/LayerIIIDecoder.java | 2439 ---------------------- 1 file changed, 2439 deletions(-) delete mode 100644 songdbj/javazoom/jl/decoder/LayerIIIDecoder.java (limited to 'songdbj/javazoom/jl/decoder/LayerIIIDecoder.java') diff --git a/songdbj/javazoom/jl/decoder/LayerIIIDecoder.java b/songdbj/javazoom/jl/decoder/LayerIIIDecoder.java deleted file mode 100644 index 602badf0f2..0000000000 --- a/songdbj/javazoom/jl/decoder/LayerIIIDecoder.java +++ /dev/null @@ -1,2439 +0,0 @@ -/* - * 11/19/04 1.0 moved to LGPL. - * - * 18/06/01 Michael Scheerer, Fixed bugs which causes - * negative indexes in method huffmann_decode and in method - * dequanisize_sample. - * - * 16/07/01 Michael Scheerer, Catched a bug in method - * huffmann_decode, which causes an outOfIndexException. - * Cause : Indexnumber of 24 at SfBandIndex, - * which has only a length of 22. I have simply and dirty - * fixed the index to <= 22, because I'm not really be able - * to fix the bug. The Indexnumber is taken from the MP3 - * file and the origin Ma-Player with the same code works - * well. - * - * 02/19/99 Java Conversion by E.B, javalayer@javazoom.net - *----------------------------------------------------------------------- - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Library General Public License as published - * by the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 Library General Public - * License along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - *---------------------------------------------------------------------- - */ - -package javazoom.jl.decoder; - -/** - * Class Implementing Layer 3 Decoder. - * - * @since 0.0 - */ -final class LayerIIIDecoder implements FrameDecoder -{ - final double d43 = (4.0/3.0); - - public int[] scalefac_buffer; - - // MDM: removed, as this wasn't being used. - //private float CheckSumOut1d = 0.0f; - private int CheckSumHuff = 0; - private int[] is_1d; - private float[][][] ro; - private float[][][] lr; - private float[] out_1d; - private float[][] prevblck; - private float[][] k; - private int[] nonzero; - private Bitstream stream; - private Header header; - private SynthesisFilter filter1, filter2; - private Obuffer buffer; - private int which_channels; - private BitReserve br; - private III_side_info_t si; - - private temporaire2[] III_scalefac_t; - private temporaire2[] scalefac; - // private III_scalefac_t scalefac; - - private int max_gr; - private int frame_start; - private int part2_start; - private int channels; - private int first_channel; - private int last_channel; - private int sfreq; - - - /** - * Constructor. - */ - // REVIEW: these constructor arguments should be moved to the - // decodeFrame() method, where possible, so that one - public LayerIIIDecoder(Bitstream stream0, Header header0, - SynthesisFilter filtera, SynthesisFilter filterb, - Obuffer buffer0, int which_ch0) - { - huffcodetab.inithuff(); - is_1d = new int[SBLIMIT*SSLIMIT+4]; - ro = new float[2][SBLIMIT][SSLIMIT]; - lr = new float[2][SBLIMIT][SSLIMIT]; - out_1d = new float[SBLIMIT*SSLIMIT]; - prevblck = new float[2][SBLIMIT*SSLIMIT]; - k = new float[2][SBLIMIT*SSLIMIT]; - nonzero = new int[2]; - - //III_scalefact_t - III_scalefac_t = new temporaire2[2]; - III_scalefac_t[0] = new temporaire2(); - III_scalefac_t[1] = new temporaire2(); - scalefac = III_scalefac_t; - // L3TABLE INIT - - sfBandIndex = new SBI[9]; // SZD: MPEG2.5 +3 indices - int[] l0 = {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}; - int[] s0 = {0,4,8,12,18,24,32,42,56,74,100,132,174,192}; - int[] l1 = {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576}; - int[] s1 = {0,4,8,12,18,26,36,48,62,80,104,136,180,192}; - int[] l2 = {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}; - int[] s2 = {0,4,8,12,18,26,36,48,62,80,104,134,174,192}; - - int[] l3 = {0,4,8,12,16,20,24,30,36,44,52,62,74,90,110,134,162,196,238,288,342,418,576}; - int[] s3 = {0,4,8,12,16,22,30,40,52,66,84,106,136,192}; - int[] l4 = {0,4,8,12,16,20,24,30,36,42,50,60,72,88,106,128,156,190,230,276,330,384,576}; - int[] s4 = {0,4,8,12,16,22,28,38,50,64,80,100,126,192}; - int[] l5 = {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576}; - int[] s5 = {0,4,8,12,16,22,30,42,58,78,104,138,180,192}; - // SZD: MPEG2.5 - int[] l6 = {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}; - int[] s6 = {0,4,8,12,18,26,36,48,62,80,104,134,174,192}; - int[] l7 = {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}; - int[] s7 = {0,4,8,12,18,26,36,48,62,80,104,134,174,192}; - int[] l8 = {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576}; - int[] s8 = {0,8,16,24,36,52,72,96,124,160,162,164,166,192}; - - sfBandIndex[0]= new SBI(l0,s0); - sfBandIndex[1]= new SBI(l1,s1); - sfBandIndex[2]= new SBI(l2,s2); - - sfBandIndex[3]= new SBI(l3,s3); - sfBandIndex[4]= new SBI(l4,s4); - sfBandIndex[5]= new SBI(l5,s5); - //SZD: MPEG2.5 - sfBandIndex[6]= new SBI(l6,s6); - sfBandIndex[7]= new SBI(l7,s7); - sfBandIndex[8]= new SBI(l8,s8); - // END OF L3TABLE INIT - - if(reorder_table == null) { // SZD: generate LUT - reorder_table = new int[9][]; - for(int i = 0; i < 9; i++) - reorder_table[i] = reorder(sfBandIndex[i].s); - } - - // Sftable - int[] ll0 = {0, 6, 11, 16, 21}; - int[] ss0 = {0, 6, 12}; - sftable = new Sftable(ll0,ss0); - // END OF Sftable - - // scalefac_buffer - scalefac_buffer = new int[54]; - // END OF scalefac_buffer - - stream = stream0; - header = header0; - filter1 = filtera; - filter2 = filterb; - buffer = buffer0; - which_channels = which_ch0; - - frame_start = 0; - channels = (header.mode() == Header.SINGLE_CHANNEL) ? 1 : 2; - max_gr = (header.version() == Header.MPEG1) ? 2 : 1; - - sfreq = header.sample_frequency() + - ((header.version() == Header.MPEG1) ? 3 : - (header.version() == Header.MPEG25_LSF) ? 6 : 0); // SZD - - if (channels == 2) - { - switch (which_channels) - { - case OutputChannels.LEFT_CHANNEL: - case OutputChannels.DOWNMIX_CHANNELS: - first_channel = last_channel = 0; - break; - - case OutputChannels.RIGHT_CHANNEL: - first_channel = last_channel = 1; - break; - - case OutputChannels.BOTH_CHANNELS: - default: - first_channel = 0; - last_channel = 1; - break; - } - } - else - { - first_channel = last_channel = 0; - } - - for(int ch=0;ch<2;ch++) - for (int j=0; j<576; j++) - prevblck[ch][j] = 0.0f; - - nonzero[0] = nonzero[1] = 576; - - br = new BitReserve(); - si = new III_side_info_t(); - } - - /** - * Notify decoder that a seek is being made. - */ - public void seek_notify() - { - frame_start = 0; - for(int ch=0;ch<2;ch++) - for (int j=0; j<576; j++) - prevblck[ch][j] = 0.0f; - br = new BitReserve(); - } - - public void decodeFrame() - { - decode(); - } - - /** - * Decode one frame, filling the buffer with the output samples. - */ - - // subband samples are buffered and passed to the - // SynthesisFilter in one go. - private float[] samples1 = new float[32]; - private float[] samples2 = new float[32]; - - public void decode() - { - int nSlots = header.slots(); - int flush_main; - int gr, ch, ss, sb, sb18; - int main_data_end; - int bytes_to_discard; - int i; - - get_side_info(); - - for (i=0; i>> 3; // of previous frame - - if ((flush_main = (br.hsstell() & 7)) != 0) { - br.hgetbits(8 - flush_main); - main_data_end++; - } - - bytes_to_discard = frame_start - main_data_end - - si.main_data_begin; - - frame_start += nSlots; - - if (bytes_to_discard < 0) - return; - - if (main_data_end > 4096) { - frame_start -= 4096; - br.rewindNbytes(4096); - } - - for (; bytes_to_discard > 0; bytes_to_discard--) - br.hgetbits(8); - - for (gr=0;gr>> 4) / 5 ; - new_slen[1] = (scalefac_comp >>> 4) % 5 ; - new_slen[2] = (scalefac_comp & 0xF) >>> 2 ; - new_slen[3] = (scalefac_comp & 3); - si.ch[ch].gr[gr].preflag = 0; - blocknumber = 0; - - } else if (scalefac_comp < 500) { - - new_slen[0] = ((scalefac_comp - 400) >>> 2) / 5 ; - new_slen[1] = ((scalefac_comp - 400) >>> 2) % 5 ; - new_slen[2] = (scalefac_comp - 400 ) & 3 ; - new_slen[3] = 0; - si.ch[ch].gr[gr].preflag = 0; - blocknumber = 1; - - } else if (scalefac_comp < 512) { - - new_slen[0] = (scalefac_comp - 500 ) / 3 ; - new_slen[1] = (scalefac_comp - 500) % 3 ; - new_slen[2] = 0; - new_slen[3] = 0; - si.ch[ch].gr[gr].preflag = 1; - blocknumber = 2; - } - } - - if((((mode_ext == 1) || (mode_ext == 3)) && (ch == 1))) - { - int_scalefac_comp = scalefac_comp >>> 1; - - if (int_scalefac_comp < 180) - { - new_slen[0] = int_scalefac_comp / 36 ; - new_slen[1] = (int_scalefac_comp % 36 ) / 6 ; - new_slen[2] = (int_scalefac_comp % 36) % 6; - new_slen[3] = 0; - si.ch[ch].gr[gr].preflag = 0; - blocknumber = 3; - } else if (int_scalefac_comp < 244) { - new_slen[0] = ((int_scalefac_comp - 180 ) & 0x3F) >>> 4 ; - new_slen[1] = ((int_scalefac_comp - 180) & 0xF) >>> 2 ; - new_slen[2] = (int_scalefac_comp - 180 ) & 3 ; - new_slen[3] = 0; - si.ch[ch].gr[gr].preflag = 0; - blocknumber = 4; - } else if (int_scalefac_comp < 255) { - new_slen[0] = (int_scalefac_comp - 244 ) / 3 ; - new_slen[1] = (int_scalefac_comp - 244 ) % 3 ; - new_slen[2] = 0 ; - new_slen[3] = 0; - si.ch[ch].gr[gr].preflag = 0; - blocknumber = 5; - } - } - - for (int x=0; x<45; x++) // why 45, not 54? - scalefac_buffer[x] = 0; - - m = 0; - for (int i=0; i<4;i++) { - for (int j = 0; j < nr_of_sfb_block[blocknumber][blocktypenumber][i]; - j++) - { - scalefac_buffer[m] = (new_slen[i] == 0) ? 0 : - br.hgetbits(new_slen[i]); - m++; - - } // for (unint32 j ... - } // for (uint32 i ... - } - - /** - * - */ - private void get_LSF_scale_factors(int ch, int gr) - { - int m = 0; - int sfb, window; - gr_info_s gr_info = (si.ch[ch].gr[gr]); - - get_LSF_scale_data(ch, gr); - - if ((gr_info.window_switching_flag != 0) && (gr_info.block_type == 2)) { - if (gr_info.mixed_block_flag != 0) { // MIXED - for (sfb = 0; sfb < 8; sfb++) - { - scalefac[ch].l[sfb] = scalefac_buffer[m]; - m++; - } - for (sfb = 3; sfb < 12; sfb++) { - for (window=0; window<3; window++) - { - scalefac[ch].s[window][sfb] = scalefac_buffer[m]; - m++; - } - } - for (window=0; window<3; window++) - scalefac[ch].s[window][12] = 0; - - } else { // SHORT - - for (sfb = 0; sfb < 12; sfb++) { - for (window=0; window<3; window++) - { - scalefac[ch].s[window][sfb] = scalefac_buffer[m]; - m++; - } - } - - for (window=0; window<3; window++) - scalefac[ch].s[window][12] = 0; - } - } else { // LONG types 0,1,3 - - for (sfb = 0; sfb < 21; sfb++) { - scalefac[ch].l[sfb] = scalefac_buffer[m]; - m++; - } - scalefac[ch].l[21] = 0; // Jeff - scalefac[ch].l[22] = 0; - } - } - - /** - * - */ - int[] x = {0}; - int[] y = {0}; - int[] v = {0}; - int[] w = {0}; - private void huffman_decode(int ch, int gr) - { - x[0] = 0; - y[0] = 0; - v[0] = 0; - w[0] = 0; - - int part2_3_end = part2_start + si.ch[ch].gr[gr].part2_3_length; - int num_bits; - int region1Start; - int region2Start; - int index; - - int buf, buf1; - - huffcodetab h; - - // Find region boundary for short block case - - if ( ((si.ch[ch].gr[gr].window_switching_flag) != 0) && - (si.ch[ch].gr[gr].block_type == 2) ) { - - // Region2. - //MS: Extrahandling for 8KHZ - region1Start = (sfreq == 8) ? 72 : 36; // sfb[9/3]*3=36 or in case 8KHZ = 72 - region2Start = 576; // No Region2 for short block case - - } else { // Find region boundary for long block case - - buf = si.ch[ch].gr[gr].region0_count + 1; - buf1 = buf + si.ch[ch].gr[gr].region1_count + 1; - - if(buf1 > sfBandIndex[sfreq].l.length - 1) buf1 = sfBandIndex[sfreq].l.length - 1; - - region1Start = sfBandIndex[sfreq].l[buf]; - region2Start = sfBandIndex[sfreq].l[buf1]; /* MI */ - } - - index = 0; - // Read bigvalues area - for (int i=0; i<(si.ch[ch].gr[gr].big_values<<1); i+=2) { - if (i= is_1d.length) System.out.println("i0="+i+"/"+(si.ch[ch].gr[gr].big_values<<1)+" Index="+index+" is_1d="+is_1d.length); - - is_1d[index++] = x[0]; - is_1d[index++] = y[0]; - - CheckSumHuff = CheckSumHuff + x[0] + y[0]; - // System.out.println("x = "+x[0]+" y = "+y[0]); - } - - // Read count1 area - h = huffcodetab.ht[si.ch[ch].gr[gr].count1table_select+32]; - num_bits = br.hsstell(); - - while ((num_bits < part2_3_end) && (index < 576)) { - - huffcodetab.huffman_decoder(h, x, y, v, w, br); - - is_1d[index++] = v[0]; - is_1d[index++] = w[0]; - is_1d[index++] = x[0]; - is_1d[index++] = y[0]; - CheckSumHuff = CheckSumHuff + v[0] + w[0] + x[0] + y[0]; - // System.out.println("v = "+v[0]+" w = "+w[0]); - // System.out.println("x = "+x[0]+" y = "+y[0]); - num_bits = br.hsstell(); - } - - if (num_bits > part2_3_end) { - br.rewindNbits(num_bits - part2_3_end); - index-=4; - } - - num_bits = br.hsstell(); - - // Dismiss stuffing bits - if (num_bits < part2_3_end) - br.hgetbits(part2_3_end - num_bits); - - // Zero out rest - - if (index < 576) - nonzero[ch] = index; - else - nonzero[ch] = 576; - - if (index < 0) index = 0; - - // may not be necessary - for (; index<576; index++) - is_1d[index] = 0; - } - - /** - * - */ - private void i_stereo_k_values(int is_pos, int io_type, int i) - { - if (is_pos == 0) { - k[0][i] = 1.0f; - k[1][i] = 1.0f; - } else if ((is_pos & 1) != 0) { - k[0][i] = io[io_type][(is_pos + 1) >>> 1]; - k[1][i] = 1.0f; - } else { - k[0][i] = 1.0f; - k[1][i] = io[io_type][is_pos >>> 1]; - } - } - - /** - * - */ - private void dequantize_sample(float xr[][], int ch, int gr) - { - gr_info_s gr_info = (si.ch[ch].gr[gr]); - int cb=0; - int next_cb_boundary; - int cb_begin = 0; - int cb_width = 0; - int index=0, t_index, j; - float g_gain; - float[][] xr_1d = xr; - - // choose correct scalefactor band per block type, initalize boundary - - if ((gr_info.window_switching_flag !=0 ) && (gr_info.block_type == 2) ) { - if (gr_info.mixed_block_flag != 0) - next_cb_boundary=sfBandIndex[sfreq].l[1]; // LONG blocks: 0,1,3 - else { - cb_width = sfBandIndex[sfreq].s[1]; - next_cb_boundary = (cb_width << 2) - cb_width; - cb_begin = 0; - } - } else { - next_cb_boundary=sfBandIndex[sfreq].l[1]; // LONG blocks: 0,1,3 - } - - // Compute overall (global) scaling. - - g_gain = (float) Math.pow(2.0 , (0.25 * (gr_info.global_gain - 210.0))); - - for (j=0; j 0) xr_1d[quotien][reste] = g_gain * t_43[abv]; - else - { - if (-abv < t_43.length) xr_1d[quotien][reste] = -g_gain * t_43[-abv]; - else xr_1d[quotien][reste] = -g_gain * (float)Math.pow(-abv, d43); - } - } - else - { - if (is_1d[j] > 0) xr_1d[quotien][reste] = g_gain * (float)Math.pow(abv, d43); - else xr_1d[quotien][reste] = -g_gain * (float)Math.pow(-abv, d43); - } - } - } - - // apply formula per block type - for (j=0; j= 36)) )) - { - - t_index = (index - cb_begin) / cb_width; - /* xr[sb][ss] *= pow(2.0, ((-2.0 * gr_info.subblock_gain[t_index]) - -(0.5 * (1.0 + gr_info.scalefac_scale) - * scalefac[ch].s[t_index][cb]))); */ - int idx = scalefac[ch].s[t_index][cb] - << gr_info.scalefac_scale; - idx += (gr_info.subblock_gain[t_index] << 2); - - xr_1d[quotien][reste] *= two_to_negative_half_pow[idx]; - - } else { // LONG block types 0,1,3 & 1st 2 subbands of switched blocks - /* xr[sb][ss] *= pow(2.0, -0.5 * (1.0+gr_info.scalefac_scale) - * (scalefac[ch].l[cb] - + gr_info.preflag * pretab[cb])); */ - int idx = scalefac[ch].l[cb]; - - if (gr_info.preflag != 0) - idx += pretab[cb]; - - idx = idx << gr_info.scalefac_scale; - xr_1d[quotien][reste] *= two_to_negative_half_pow[idx]; - } - index++; - } - - for (j=nonzero[ch]; j<576; j++) - { - // Modif E.B 02/22/99 - int reste = j % SSLIMIT; - int quotien = (int) ((j-reste)/SSLIMIT); - if(reste < 0) reste = 0; - if(quotien < 0) quotien = 0; - xr_1d[quotien][reste] = 0.0f; - } - - return; - } - - /** - * - */ - private void reorder(float xr[][], int ch, int gr) - { - gr_info_s gr_info = (si.ch[ch].gr[gr]); - int freq, freq3; - int index; - int sfb, sfb_start, sfb_lines; - int src_line, des_line; - float[][] xr_1d = xr; - - if ((gr_info.window_switching_flag !=0) && (gr_info.block_type == 2)) { - - for(index=0; index<576; index++) - out_1d[index] = 0.0f; - - if (gr_info.mixed_block_flag !=0 ) { - // NO REORDER FOR LOW 2 SUBBANDS - for (index = 0; index < 36; index++) - { - // Modif E.B 02/22/99 - int reste = index % SSLIMIT; - int quotien = (int) ((index-reste)/SSLIMIT); - out_1d[index] = xr_1d[quotien][reste]; - } - // REORDERING FOR REST SWITCHED SHORT - /*for( sfb=3,sfb_start=sfBandIndex[sfreq].s[3], - sfb_lines=sfBandIndex[sfreq].s[4] - sfb_start; - sfb < 13; sfb++,sfb_start = sfBandIndex[sfreq].s[sfb], - sfb_lines = sfBandIndex[sfreq].s[sfb+1] - sfb_start ) - {*/ - for( sfb=3; sfb < 13; sfb++) - { - //System.out.println("sfreq="+sfreq+" sfb="+sfb+" sfBandIndex="+sfBandIndex.length+" sfBandIndex[sfreq].s="+sfBandIndex[sfreq].s.length); - sfb_start = sfBandIndex[sfreq].s[sfb]; - sfb_lines = sfBandIndex[sfreq].s[sfb+1] - sfb_start; - - int sfb_start3 = (sfb_start << 2) - sfb_start; - - for(freq=0, freq3=0; freq=3; sfb-- ) { - i = sfBandIndex[sfreq].s[sfb]; - lines = sfBandIndex[sfreq].s[sfb+1] - i; - i = (i << 2) - i + (j+1) * lines - 1; - - while (lines > 0) { - if (ro[1][i/18][i%18] != 0.0f) { - // MDM: in java, array access is very slow. - // Is quicker to compute div and mod values. - //if (ro[1][ss_div[i]][ss_mod[i]] != 0.0f) { - sfbcnt = sfb; - sfb = -10; - lines = -10; - } - - lines--; - i--; - - } // while (lines > 0) - - } // for (sfb=12 ... - sfb = sfbcnt + 1; - - if (sfb > max_sfb) - max_sfb = sfb; - - while(sfb < 12) { - temp = sfBandIndex[sfreq].s[sfb]; - sb = sfBandIndex[sfreq].s[sfb+1] - temp; - i = (temp << 2) - temp + j * sb; - - for ( ; sb > 0; sb--) { - is_pos[i] = scalefac[1].s[j][sfb]; - if (is_pos[i] != 7) - if (lsf) - i_stereo_k_values(is_pos[i], io_type, i); - else - is_ratio[i] = TAN12[is_pos[i]]; - - i++; - } // for (; sb>0... - sfb++; - } // while (sfb < 12) - sfb = sfBandIndex[sfreq].s[10]; - sb = sfBandIndex[sfreq].s[11] - sfb; - sfb = (sfb << 2) - sfb + j * sb; - temp = sfBandIndex[sfreq].s[11]; - sb = sfBandIndex[sfreq].s[12] - temp; - i = (temp << 2) - temp + j * sb; - - for (; sb > 0; sb--) { - is_pos[i] = is_pos[sfb]; - - if (lsf) { - k[0][i] = k[0][sfb]; - k[1][i] = k[1][sfb]; - } else { - is_ratio[i] = is_ratio[sfb]; - } - i++; - } // for (; sb > 0 ... - } - if (max_sfb <= 3) { - i = 2; - ss = 17; - sb = -1; - while (i >= 0) { - if (ro[1][i][ss] != 0.0f) { - sb = (i<<4) + (i<<1) + ss; - i = -1; - } else { - ss--; - if (ss < 0) { - i--; - ss = 17; - } - } // if (ro ... - } // while (i>=0) - i = 0; - while (sfBandIndex[sfreq].l[i] <= sb) - i++; - sfb = i; - i = sfBandIndex[sfreq].l[i]; - for (; sfb<8; sfb++) { - sb = sfBandIndex[sfreq].l[sfb+1]-sfBandIndex[sfreq].l[sfb]; - for (; sb>0; sb--) { - is_pos[i] = scalefac[1].l[sfb]; - if (is_pos[i] != 7) - if (lsf) - i_stereo_k_values(is_pos[i], io_type, i); - else - is_ratio[i] = TAN12[is_pos[i]]; - i++; - } // for (; sb>0 ... - } // for (; sfb<8 ... - } // for (j=0 ... - } else { // if (gr_info.mixed_block_flag) - for (int j=0; j<3; j++) { - int sfbcnt; - sfbcnt = -1; - for( sfb=12; sfb >=0; sfb-- ) - { - temp = sfBandIndex[sfreq].s[sfb]; - lines = sfBandIndex[sfreq].s[sfb+1] - temp; - i = (temp << 2) - temp + (j+1) * lines - 1; - - while (lines > 0) { - if (ro[1][i/18][i%18] != 0.0f) { - // MDM: in java, array access is very slow. - // Is quicker to compute div and mod values. - //if (ro[1][ss_div[i]][ss_mod[i]] != 0.0f) { - sfbcnt = sfb; - sfb = -10; - lines = -10; - } - lines--; - i--; - } // while (lines > 0) */ - - } // for (sfb=12 ... - sfb = sfbcnt + 1; - while(sfb<12) { - temp = sfBandIndex[sfreq].s[sfb]; - sb = sfBandIndex[sfreq].s[sfb+1] - temp; - i = (temp << 2) - temp + j * sb; - for ( ; sb > 0; sb--) { - is_pos[i] = scalefac[1].s[j][sfb]; - if (is_pos[i] != 7) - if (lsf) - i_stereo_k_values(is_pos[i], io_type, i); - else - is_ratio[i] = TAN12[is_pos[i]]; - i++; - } // for (; sb>0 ... - sfb++; - } // while (sfb<12) - - temp = sfBandIndex[sfreq].s[10]; - temp2= sfBandIndex[sfreq].s[11]; - sb = temp2 - temp; - sfb = (temp << 2) - temp + j * sb; - sb = sfBandIndex[sfreq].s[12] - temp2; - i = (temp2 << 2) - temp2 + j * sb; - - for (; sb>0; sb--) { - is_pos[i] = is_pos[sfb]; - - if (lsf) { - k[0][i] = k[0][sfb]; - k[1][i] = k[1][sfb]; - } else { - is_ratio[i] = is_ratio[sfb]; - } - i++; - } // for (; sb>0 ... - } // for (sfb=12 - } // for (j=0 ... - } else { // if (gr_info.window_switching_flag ... - i = 31; - ss = 17; - sb = 0; - while (i >= 0) { - if (ro[1][i][ss] != 0.0f) { - sb = (i<<4) + (i<<1) + ss; - i = -1; - } else { - ss--; - if (ss < 0) { - i--; - ss = 17; - } - } - } - i = 0; - while (sfBandIndex[sfreq].l[i] <= sb) - i++; - - sfb = i; - i = sfBandIndex[sfreq].l[i]; - for (; sfb<21; sfb++) { - sb = sfBandIndex[sfreq].l[sfb+1] - sfBandIndex[sfreq].l[sfb]; - for (; sb > 0; sb--) { - is_pos[i] = scalefac[1].l[sfb]; - if (is_pos[i] != 7) - if (lsf) - i_stereo_k_values(is_pos[i], io_type, i); - else - is_ratio[i] = TAN12[is_pos[i]]; - i++; - } - } - sfb = sfBandIndex[sfreq].l[20]; - for (sb = 576 - sfBandIndex[sfreq].l[21]; (sb > 0) && (i<576); sb--) - { - is_pos[i] = is_pos[sfb]; // error here : i >=576 - - if (lsf) { - k[0][i] = k[0][sfb]; - k[1][i] = k[1][sfb]; - } else { - is_ratio[i] = is_ratio[sfb]; - } - i++; - } // if (gr_info.mixed_block_flag) - } // if (gr_info.window_switching_flag ... - } // if (i_stereo) - - i = 0; - for(sb=0;sb