--- /dev/null
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Antonius Hellmann
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+// Shine is an MP3 encoder
+// Copyright (C) 1999-2000 Gabriel Bouvigne
+//
+// This library 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 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.
+
+#define IBSS_ATTR
+
+#ifdef WORDS_BIGENDIAN
+#define ROCKBOX_BIG_ENDIAN
+#else
+#define ROCKBOX_LITTLE_ENDIAN
+#endif
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <string.h>
+#include <limits.h>
+#include "../wmafixed/bswap.h"
+#include "enc_base.h"
+
+#define ENC_PADDING_FRAMES1 2
+#define ENC_PADDING_FRAMES2 4
+#define ENC_DELAY_SAMP 576
+#define ENC_DELAY_SIZE (ENC_DELAY_SAMP*4)
+#define SAMP_PER_FRAME1 1152
+#define SAMP_PER_FRAME2 576
+#define PCM_CHUNK_SIZE1 (SAMP_PER_FRAME1*4)
+#define PCM_CHUNK_SIZE2 (SAMP_PER_FRAME2*4)
+#define SAMPL2 576
+#define SBLIMIT 32
+#define HTN 16
+
+#define putlong(c, s) if(s+sz <= 32) { cc = (cc << s) | c; sz+= s; } \
+ else { putbits(cc, sz); cc = c; sz = s; }
+
+typedef struct {
+ int type; /* 0=(MPEG2 - 22.05,24,16kHz) 1=(MPEG1 - 44.1,48,32kHz) */
+ int mode; /* 0=stereo, 1=jstereo, 2=dual, 3=mono */
+ int bitrate;
+ int padding;
+ int num_bands;
+ long bitr_id;
+ int smpl_id;
+} mpeg_t;
+
+/* Side information */
+typedef struct {
+ uint32_t part2_3_length;
+ int count1; /* number of 0-1-quadruples */
+ uint32_t global_gain;
+ uint32_t table_select[4];
+ uint32_t region_0_1;
+ uint32_t address1;
+ uint32_t address2;
+ uint32_t address3;
+ long quantStep;
+ long additStep;
+ uint32_t max_val;
+} side_info_t;
+
+typedef struct {
+ side_info_t cod_info[2][2];
+ mpeg_t mpg;
+ long frac_per_frame;
+ long byte_per_frame;
+ long slot_lag;
+ int sideinfo_len;
+ int mean_bits;
+ int ResvSize;
+ int channels;
+ int granules;
+ long samplerate;
+} config_t;
+
+typedef struct {
+ int bitpos; /* current bitpos for writing */
+ uint32_t bbuf[263];
+} BF_Data;
+
+struct huffcodetab {
+ int len; /* max. index */
+ const uint8_t *table; /* pointer to array[len][len] */
+ const uint8_t *hlen; /* pointer to array[len][len] */
+};
+
+struct huffcodebig {
+ int len; /* max. index */
+ int linbits; /* number of linbits */
+ int linmax; /* max number stored in linbits */
+};
+
+#define shft4(x) ((x + 8) >> 4)
+#define shft9(x) ((x + 256) >> 9)
+#define shft13(x) ((x + 4096) >> 13)
+#define shft15(x) ((x + 16384) >> 15)
+#define shft16(x) ((x + 32768) >> 16)
+#define shft_n(x,n) ((x) >> n)
+#define SQRT 724 /* sqrt(2) * 512 */
+
+static short mfbuf [2*(1152+512)] IBSS_ATTR; /* 3328 Bytes */
+static int sb_data [2][2][18][SBLIMIT] IBSS_ATTR; /* 13824 Bytes */
+static int mdct_freq [SAMPL2] IBSS_ATTR; /* 2304 Bytes */
+static char mdct_sign [SAMPL2] IBSS_ATTR; /* 576 Bytes */
+static short enc_data [SAMPL2] IBSS_ATTR; /* 1152 Bytes */
+static uint32_t scalefac [23] IBSS_ATTR; /* 92 Bytes */
+static BF_Data CodedData IBSS_ATTR; /* 1056 Bytes */
+static int ca [8] IBSS_ATTR; /* 32 Bytes */
+static int cs [8] IBSS_ATTR; /* 32 Bytes */
+static int cx [9] IBSS_ATTR; /* 36 Bytes */
+static int win [18][4] IBSS_ATTR; /* 288 Bytes */
+static short enwindow [15*27+24] IBSS_ATTR; /* 862 Bytes */
+static short int2idx [4096] IBSS_ATTR; /* 8192 Bytes */
+static uint8_t ht_count [2][2][16] IBSS_ATTR; /* 64 Bytes */
+static uint32_t tab01 [ 16] IBSS_ATTR; /* 64 Bytes */
+static uint32_t tab23 [ 9] IBSS_ATTR; /* 36 Bytes */
+static uint32_t tab56 [ 16] IBSS_ATTR; /* 64 Bytes */
+static uint32_t tab1315 [256] IBSS_ATTR; /* 1024 Bytes */
+static uint32_t tab1624 [256] IBSS_ATTR; /* 1024 Bytes */
+static uint32_t tab789 [ 36] IBSS_ATTR; /* 144 Bytes */
+static uint32_t tabABC [ 64] IBSS_ATTR; /* 256 Bytes */
+static uint8_t t1HB [ 4] IBSS_ATTR;
+static uint8_t t2HB [ 9] IBSS_ATTR;
+static uint8_t t3HB [ 9] IBSS_ATTR;
+static uint8_t t5HB [ 16] IBSS_ATTR;
+static uint8_t t6HB [ 16] IBSS_ATTR;
+static uint8_t t7HB [ 36] IBSS_ATTR;
+static uint8_t t8HB [ 36] IBSS_ATTR;
+static uint8_t t9HB [ 36] IBSS_ATTR;
+static uint8_t t10HB [ 64] IBSS_ATTR;
+static uint8_t t11HB [ 64] IBSS_ATTR;
+static uint8_t t12HB [ 64] IBSS_ATTR;
+static uint8_t t13HB [256] IBSS_ATTR;
+static uint8_t t15HB [256] IBSS_ATTR;
+static uint16_t t16HB [256] IBSS_ATTR;
+static uint16_t t24HB [256] IBSS_ATTR;
+static uint8_t t1l [ 8] IBSS_ATTR;
+static uint8_t t2l [ 9] IBSS_ATTR;
+static uint8_t t3l [ 9] IBSS_ATTR;
+static uint8_t t5l [ 16] IBSS_ATTR;
+static uint8_t t6l [ 16] IBSS_ATTR;
+static uint8_t t7l [ 36] IBSS_ATTR;
+static uint8_t t8l [ 36] IBSS_ATTR;
+static uint8_t t9l [ 36] IBSS_ATTR;
+static uint8_t t10l [ 64] IBSS_ATTR;
+static uint8_t t11l [ 64] IBSS_ATTR;
+static uint8_t t12l [ 64] IBSS_ATTR;
+static uint8_t t13l [256] IBSS_ATTR;
+static uint8_t t15l [256] IBSS_ATTR;
+static uint8_t t16l [256] IBSS_ATTR;
+static uint8_t t24l [256] IBSS_ATTR;
+static struct huffcodetab ht [HTN] IBSS_ATTR;
+
+static unsigned pcm_chunk_size IBSS_ATTR;
+static unsigned samp_per_frame IBSS_ATTR;
+
+static config_t cfg IBSS_ATTR;
+//static char *res_buffer;
+static int32_t err IBSS_ATTR;
+static uint8_t band_scale_f[22];
+
+static const uint8_t ht_count_const[2][2][16] =
+{ { { 1, 5, 4, 5, 6, 5, 4, 4, 7, 3, 6, 0, 7, 2, 3, 1 }, /* table0 */
+ { 1, 5, 5, 7, 5, 8, 7, 9, 5, 7, 7, 9, 7, 9, 9,10 } }, /* hleng0 */
+ { {15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 }, /* table1 */
+ { 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 } } }; /* hleng1 */
+
+static const uint8_t t1HB_const[4] = {1,1,1,0};
+static const uint8_t t2HB_const[9] = {1,2,1,3,1,1,3,2,0};
+static const uint8_t t3HB_const[9] = {3,2,1,1,1,1,3,2,0};
+static const uint8_t t5HB_const[16] = {1,2,6,5,3,1,4,4,7,5,7,1,6,1,1,0};
+static const uint8_t t6HB_const[16] = {7,3,5,1,6,2,3,2,5,4,4,1,3,3,2,0};
+
+static const uint8_t t7HB_const[36] =
+{ 1, 2,10,19,16,10, 3, 3, 7,10, 5, 3,11, 4,13,17, 8, 4,
+ 12,11,18,15,11, 2, 7, 6, 9,14, 3, 1, 6, 4, 5, 3, 2, 0 };
+
+static const uint8_t t8HB_const[36] =
+{ 3, 4, 6,18,12, 5, 5, 1, 2,16, 9, 3, 7, 3, 5,14, 7, 3,
+ 19,17,15,13,10, 4,13, 5, 8,11, 5, 1,12, 4, 4, 1, 1, 0 };
+
+static const uint8_t t9HB_const[36] =
+{ 7, 5, 9,14,15, 7, 6, 4, 5, 5, 6, 7, 7, 6, 8, 8, 8, 5,
+ 15, 6, 9,10, 5, 1,11, 7, 9, 6, 4, 1,14, 4, 6, 2, 6, 0 };
+
+static const uint8_t t10HB_const[64] =
+{1,2,10,23,35,30,12,17,3,3,8,12,18,21,12,7,11,9,15,21,32,
+ 40,19,6,14,13,22,34,46,23,18,7,20,19,33,47,27,22,9,3,31,22,
+ 41,26,21,20,5,3,14,13,10,11,16,6,5,1,9,8,7,8,4,4,2,0 };
+
+static const uint8_t t11HB_const[64] =
+{3,4,10,24,34,33,21,15,5,3,4,10,32,17,11,10,11,7,13,18,30,
+ 31,20,5,25,11,19,59,27,18,12,5,35,33,31,58,30,16,7,5,28,26,
+ 32,19,17,15,8,14,14,12,9,13,14,9,4,1,11,4,6,6,6,3,2,0 };
+
+static const uint8_t t12HB_const[64] =
+{9,6,16,33,41,39,38,26,7,5,6,9,23,16,26,11,17,7,11,14,21,
+30,10,7,17,10,15,12,18,28,14,5,32,13,22,19,18,16,9,5,40,17,
+31,29,17,13,4,2,27,12,11,15,10,7,4,1,27,12,8,12,6,3,1,0 };
+
+static const uint8_t t13HB_const[256] =
+{1,5,14,21,34,51,46,71,42,52,68,52,67,44,43,19,3,4,12,19,31,26,44,33,31,24,32,
+ 24,31,35,22,14,15,13,23,36,59,49,77,65,29,40,30,40,27,33,42,16,22,20,37,61,56,
+ 79,73,64,43,76,56,37,26,31,25,14,35,16,60,57,97,75,114,91,54,73,55,41,48,53,
+ 23,24,58,27,50,96,76,70,93,84,77,58,79,29,74,49,41,17,47,45,78,74,115,94,90,
+ 79,69,83,71,50,59,38,36,15,72,34,56,95,92,85,91,90,86,73,77,65,51,44,43,42,43,
+ 20,30,44,55,78,72,87,78,61,46,54,37,30,20,16,53,25,41,37,44,59,54,81,66,76,57,
+ 54,37,18,39,11,35,33,31,57,42,82,72,80,47,58,55,21,22,26,38,22,53,25,23,38,70,
+ 60,51,36,55,26,34,23,27,14,9,7,34,32,28,39,49,75,30,52,48,40,52,28,18,17,9,5,
+ 45,21,34,64,56,50,49,45,31,19,12,15,10,7,6,3,48,23,20,39,36,35,53,21,16,23,13,
+ 10,6,1,4,2,16,15,17,27,25,20,29,11,17,12,16,8,1,1,0,1 };
+
+static const uint8_t t15HB_const[256] =
+{7,12,18,53,47,76,124,108,89,123,108,119,107,81,122,63,13,5,16,27,46,36,61,51,
+ 42,70,52,83,65,41,59,36,19,17,15,24,41,34,59,48,40,64,50,78,62,80,56,33,29,28,
+ 25,43,39,63,55,93,76,59,93,72,54,75,50,29,52,22,42,40,67,57,95,79,72,57,89,69,
+ 49,66,46,27,77,37,35,66,58,52,91,74,62,48,79,63,90,62,40,38,125,32,60,56,50,
+ 92,78,65,55,87,71,51,73,51,70,30,109,53,49,94,88,75,66,122,91,73,56,42,64,44,
+ 21,25,90,43,41,77,73,63,56,92,77,66,47,67,48,53,36,20,71,34,67,60,58,49,88,76,
+ 67,106,71,54,38,39,23,15,109,53,51,47,90,82,58,57,48,72,57,41,23,27,62,9,86,
+ 42,40,37,70,64,52,43,70,55,42,25,29,18,11,11,118,68,30,55,50,46,74,65,49,39,
+ 24,16,22,13,14,7,91,44,39,38,34,63,52,45,31,52,28,19,14,8,9,3,123,60,58,53,47,
+ 43,32,22,37,24,17,12,15,10,2,1,71,37,34,30,28,20,17,26,21,16,10,6,8,6,2,0};
+
+static const uint16_t t16HB_const[256] =
+{1,5,14,44,74,63,110,93,172,149,138,242,225,195,376,17,3,4,12,20,35,62,53,47,
+ 83,75,68,119,201,107,207,9,15,13,23,38,67,58,103,90,161,72,127,117,110,209,
+ 206,16,45,21,39,69,64,114,99,87,158,140,252,212,199,387,365,26,75,36,68,65,
+ 115,101,179,164,155,264,246,226,395,382,362,9,66,30,59,56,102,185,173,265,142,
+ 253,232,400,388,378,445,16,111,54,52,100,184,178,160,133,257,244,228,217,385,
+ 366,715,10,98,48,91,88,165,157,148,261,248,407,397,372,380,889,884,8,85,84,81,
+ 159,156,143,260,249,427,401,392,383,727,713,708,7,154,76,73,141,131,256,245,
+ 426,406,394,384,735,359,710,352,11,139,129,67,125,247,233,229,219,393,743,737,
+ 720,885,882,439,4,243,120,118,115,227,223,396,746,742,736,721,712,706,223,436,
+ 6,202,224,222,218,216,389,386,381,364,888,443,707,440,437,1728,4,747,211,210,
+ 208,370,379,734,723,714,1735,883,877,876,3459,865,2,377,369,102,187,726,722,
+ 358,711,709,866,1734,871,3458,870,434,0,12,10,7,11,10,17,11,9,13,12,10,7,5,3,
+ 1,3};
+
+static const uint16_t t24HB_const[256] =
+{15,13,46,80,146,262,248,434,426,669,653,649,621,517,1032,88,14,12,21,38,71,
+ 130,122,216,209,198,327,345,319,297,279,42,47,22,41,74,68,128,120,221,207,194,
+ 182,340,315,295,541,18,81,39,75,70,134,125,116,220,204,190,178,325,311,293,
+ 271,16,147,72,69,135,127,118,112,210,200,188,352,323,306,285,540,14,263,66,
+ 129,126,119,114,214,202,192,180,341,317,301,281,262,12,249,123,121,117,113,
+ 215,206,195,185,347,330,308,291,272,520,10,435,115,111,109,211,203,196,187,
+ 353,332,313,298,283,531,381,17,427,212,208,205,201,193,186,177,169,320,303,
+ 286,268,514,377,16,335,199,197,191,189,181,174,333,321,305,289,275,521,379,
+ 371,11,668,184,183,179,175,344,331,314,304,290,277,530,383,373,366,10,652,346,
+ 171,168,164,318,309,299,287,276,263,513,375,368,362,6,648,322,316,312,307,302,
+ 292,284,269,261,512,376,370,364,359,4,620,300,296,294,288,282,273,266,515,380,
+ 374,369,365,361,357,2,1033,280,278,274,267,264,259,382,378,372,367,363,360,
+ 358,356,0,43,20,19,17,15,13,11,9,7,6,4,7,5,3,1,3};
+
+static const uint32_t tab1315_const[256] =
+{ 0x010003,0x050005,0x070006,0x080008,0x090008,0x0a0009,0x0a000a,0x0b000a,
+ 0x0a000a,0x0b000b,0x0c000b,0x0c000c,0x0d000c,0x0d000c,0x0e000d,0x0e000e,
+ 0x040005,0x060005,0x080007,0x090008,0x0a0009,0x0a0009,0x0b000a,0x0b000a,
+ 0x0b000a,0x0b000b,0x0c000b,0x0c000c,0x0d000c,0x0e000c,0x0e000d,0x0e000d,
+ 0x070006,0x080007,0x090007,0x0a0008,0x0b0009,0x0b0009,0x0c000a,0x0c000a,
+ 0x0b000a,0x0c000b,0x0c000b,0x0d000c,0x0d000c,0x0e000d,0x0f000d,0x0f000d,
+ 0x080007,0x090008,0x0a0008,0x0b0009,0x0b0009,0x0c000a,0x0c000a,0x0c000b,
+ 0x0c000b,0x0d000b,0x0d000c,0x0d000c,0x0d000c,0x0e000d,0x0f000d,0x0f000d,
+ 0x090008,0x090008,0x0b0009,0x0b0009,0x0c000a,0x0c000a,0x0d000b,0x0d000b,
+ 0x0c000b,0x0d000b,0x0d000c,0x0e000c,0x0e000c,0x0f000d,0x0f000d,0x10000d,
+ 0x0a0009,0x0a0009,0x0b0009,0x0c000a,0x0c000a,0x0c000a,0x0d000b,0x0d000b,
+ 0x0d000b,0x0d000b,0x0e000c,0x0d000c,0x0f000d,0x0f000d,0x10000d,0x10000e,
+ 0x0a000a,0x0b0009,0x0c000a,0x0c000a,0x0d000a,0x0d000b,0x0d000b,0x0d000b,
+ 0x0d000b,0x0e000c,0x0e000c,0x0e000c,0x0f000d,0x0f000d,0x10000e,0x10000e,
+ 0x0b000a,0x0b000a,0x0c000a,0x0d000b,0x0d000b,0x0d000b,0x0e000b,0x0e000c,
+ 0x0e000c,0x0e000c,0x0f000c,0x0f000c,0x0f000d,0x10000d,0x12000d,0x12000e,
+ 0x0a000a,0x0a000a,0x0b000a,0x0c000b,0x0c000b,0x0d000b,0x0d000b,0x0e000c,
+ 0x0e000c,0x0e000c,0x0e000c,0x0f000d,0x0f000d,0x10000e,0x11000e,0x11000e,
+ 0x0b000a,0x0b000a,0x0c000b,0x0c000b,0x0d000b,0x0d000b,0x0d000c,0x0f000c,
+ 0x0e000c,0x0f000d,0x0f000d,0x10000d,0x10000d,0x10000e,0x12000e,0x11000e,
+ 0x0b000b,0x0c000b,0x0c000b,0x0d000b,0x0d000c,0x0e000c,0x0e000c,0x0f000c,
+ 0x0e000c,0x0f000d,0x10000d,0x0f000d,0x10000d,0x11000e,0x12000f,0x13000e,
+ 0x0c000b,0x0c000b,0x0c000b,0x0d000b,0x0e000c,0x0e000c,0x0e000c,0x0e000c,
+ 0x0f000d,0x0f000d,0x0f000d,0x10000d,0x11000e,0x11000e,0x11000e,0x12000f,
+ 0x0c000c,0x0d000c,0x0d000b,0x0e000c,0x0e000c,0x0f000c,0x0e000d,0x0f000d,
+ 0x10000d,0x10000d,0x11000d,0x11000d,0x11000e,0x12000e,0x12000f,0x12000f,
+ 0x0d000c,0x0d000c,0x0e000c,0x0f000c,0x0f000c,0x0f000d,0x10000d,0x10000d,
+ 0x10000d,0x10000e,0x10000e,0x11000e,0x12000e,0x11000e,0x12000f,0x12000f,
+ 0x0e000d,0x0e000d,0x0e000d,0x0f000d,0x0f000d,0x0f000d,0x11000d,0x10000d,
+ 0x10000e,0x13000e,0x11000e,0x11000e,0x11000f,0x13000f,0x12000e,0x12000f,
+ 0x0d000d,0x0e000d,0x0f000d,0x10000d,0x10000d,0x10000d,0x11000d,0x10000e,
+ 0x11000e,0x11000e,0x12000e,0x12000e,0x15000f,0x14000f,0x15000f,0x12000f };
+
+static const uint32_t tab01_const[16] =
+{ 0x10004,0x50005,0x50005,0x70006,0x50005,0x80006,0x70006,0x90007,
+ 0x50005,0x70006,0x70006,0x90007,0x70006,0x90007,0x90007,0xa0008 };
+
+static const uint32_t tab23_const[ 9] =
+{ 0x10002,0x40003,0x70007,0x40004,0x50004,0x70007,0x60006,0x70007,0x80008 };
+
+static const uint32_t tab56_const[16] =
+{ 0x10003,0x40004,0x70006,0x80008,0x40004,0x50004,0x80006,0x90007,
+ 0x70005,0x80006,0x90007,0xa0008,0x80007,0x80007,0x90008,0xa0009 };
+
+static const uint32_t tab789_const[36] =
+{0x00100803,0x00401004,0x00701c06,0x00902407,0x00902409,0x00a0280a,0x00401004,
+ 0x00601005,0x00801806,0x00902807,0x00902808,0x00a0280a,0x00701c05,0x00701806,
+ 0x00902007,0x00a02808,0x00a02809,0x00b02c0a,0x00802407,0x00902807,0x00a02808,
+ 0x00b02c09,0x00b02c09,0x00b0300a,0x00802408,0x00902408,0x00a02809,0x00b02c09,
+ 0x00b0300a,0x00c0300b,0x00902809,0x00a02809,0x00b02c0a,0x00c02c0a,0x00c0340b,
+ 0x00c0340b};
+
+static const uint32_t tabABC_const[64] =
+{0x00100804,0x00401004,0x00701806,0x00902008,0x00a02409,0x00a0280a,0x00a0240a,
+ 0x00b0280a,0x00401004,0x00601405,0x00801806,0x00902007,0x00a02809,0x00b02809,
+ 0x00a0240a,0x00a0280a,0x00701806,0x00801c06,0x00902007,0x00a02408,0x00b02809,
+ 0x00c02c0a,0x00b02809,0x00b0280a,0x00802007,0x00902007,0x00a02408,0x00b02c08,
+ 0x00c02809,0x00c0300a,0x00b0280a,0x00c02c0a,0x00902408,0x00a02808,0x00b02809,
+ 0x00c02c09,0x00c02c0a,0x00c0300a,0x00c02c0a,0x00c0300b,0x00a02409,0x00b02809,
+ 0x00c02c0a,0x00c0300a,0x00d0300a,0x00d0340b,0x00c0300a,0x00d0340b,0x00902409,
+ 0x00a02409,0x00b02409,0x00c0280a,0x00c02c0a,0x00c0300b,0x00d0300b,0x00d0300c,
+ 0x00a0240a,0x00a0240a,0x00b0280a,0x00c02c0b,0x00c0300b,0x00d0300b,0x00d0300b,
+ 0x00d0300c};
+
+static const uint32_t tab1624_const[256] =
+{0x00010004,0x00050005,0x00070007,0x00090008,0x000a0009,0x000a000a,0x000b000a,
+ 0x000b000b,0x000c000b,0x000c000c,0x000c000c,0x000d000c,0x000d000c,0x000d000c,
+ 0x000e000d,0x000a000a,0x00040005,0x00060006,0x00080007,0x00090008,0x000a0009,
+ 0x000b000a,0x000b000a,0x000b000b,0x000c000b,0x000c000b,0x000c000c,0x000d000c,
+ 0x000e000c,0x000d000c,0x000e000c,0x000a000a,0x00070007,0x00080007,0x00090008,
+ 0x000a0009,0x000b0009,0x000b000a,0x000c000a,0x000c000b,0x000d000b,0x000c000b,
+ 0x000d000b,0x000d000c,0x000d000c,0x000e000c,0x000e000d,0x000b0009,0x00090008,
+ 0x00090008,0x000a0009,0x000b0009,0x000b000a,0x000c000a,0x000c000a,0x000c000b,
+ 0x000d000b,0x000d000b,0x000e000b,0x000e000c,0x000e000c,0x000f000c,0x000f000c,
+ 0x000c0009,0x000a0009,0x000a0009,0x000b0009,0x000b000a,0x000c000a,0x000c000a,
+ 0x000d000a,0x000d000b,0x000d000b,0x000e000b,0x000e000c,0x000e000c,0x000f000c,
+ 0x000f000c,0x000f000d,0x000b0009,0x000a000a,0x000a0009,0x000b000a,0x000b000a,
+ 0x000c000a,0x000d000a,0x000d000b,0x000e000b,0x000d000b,0x000e000b,0x000e000c,
+ 0x000f000c,0x000f000c,0x000f000c,0x0010000c,0x000c0009,0x000b000a,0x000b000a,
+ 0x000b000a,0x000c000a,0x000d000a,0x000d000b,0x000d000b,0x000d000b,0x000e000b,
+ 0x000e000c,0x000e000c,0x000e000c,0x000f000c,0x000f000c,0x0010000d,0x000c0009,
+ 0x000b000b,0x000b000a,0x000c000a,0x000c000a,0x000d000b,0x000d000b,0x000d000b,
+ 0x000e000b,0x000e000c,0x000f000c,0x000f000c,0x000f000c,0x000f000c,0x0011000d,
+ 0x0011000d,0x000c000a,0x000b000b,0x000c000b,0x000c000b,0x000d000b,0x000d000b,
+ 0x000d000b,0x000e000b,0x000e000b,0x000f000b,0x000f000c,0x000f000c,0x000f000c,
+ 0x0010000c,0x0010000d,0x0010000d,0x000c000a,0x000c000b,0x000c000b,0x000c000b,
+ 0x000d000b,0x000d000b,0x000e000b,0x000e000b,0x000f000c,0x000f000c,0x000f000c,
+ 0x000f000c,0x0010000c,0x000f000d,0x0010000d,0x000f000d,0x000d000a,0x000c000c,
+ 0x000d000b,0x000c000b,0x000d000b,0x000e000b,0x000e000c,0x000e000c,0x000e000c,
+ 0x000f000c,0x0010000c,0x0010000c,0x0010000d,0x0011000d,0x0011000d,0x0010000d,
+ 0x000c000a,0x000d000c,0x000d000c,0x000d000b,0x000d000b,0x000e000b,0x000e000c,
+ 0x000f000c,0x0010000c,0x0010000c,0x0010000c,0x0010000c,0x0010000d,0x0010000d,
+ 0x000f000d,0x0010000d,0x000d000a,0x000d000c,0x000e000c,0x000e000c,0x000e000c,
+ 0x000e000c,0x000f000c,0x000f000c,0x000f000c,0x000f000c,0x0011000c,0x0010000d,
+ 0x0010000d,0x0010000d,0x0010000d,0x0012000d,0x000d000a,0x000f000c,0x000e000c,
+ 0x000e000c,0x000e000c,0x000f000c,0x000f000c,0x0010000c,0x0010000c,0x0010000d,
+ 0x0012000d,0x0011000d,0x0011000d,0x0011000d,0x0013000d,0x0011000d,0x000d000a,
+ 0x000e000d,0x000f000c,0x000d000c,0x000e000c,0x0010000c,0x0010000c,0x000f000c,
+ 0x0010000d,0x0010000d,0x0011000d,0x0012000d,0x0011000d,0x0013000d,0x0011000d,
+ 0x0010000d,0x000d000a,0x000a0009,0x000a0009,0x000a0009,0x000b0009,0x000b0009,
+ 0x000c0009,0x000c0009,0x000c0009,0x000d0009,0x000d0009,0x000d0009,0x000d000a,
+ 0x000d000a,0x000d000a,0x000d000a,0x000a0006};
+
+static const uint8_t t1l_const[8] = {1,3,2,3,1,4,3,5};
+static const uint8_t t2l_const[9] = {1,3,6,3,3,5,5,5,6};
+static const uint8_t t3l_const[9] = {2,2,6,3,2,5,5,5,6};
+static const uint8_t t5l_const[16] = {1,3,6,7,3,3,6,7,6,6,7,8,7,6,7,8};
+static const uint8_t t6l_const[16] = {3,3,5,7,3,2,4,5,4,4,5,6,6,5,6,7};
+
+static const uint8_t t7l_const[36] =
+{1,3,6,8,8,9,3,4,6,7,7,8,6,5,7,8,8,9,7,7,8,9,9,9,7,7,8,9,9,10,8,8,9,10,10,10};
+
+static const uint8_t t8l_const[36] =
+{2,3,6,8,8,9,3,2,4,8,8,8,6,4,6,8,8,9,8,8,8,9,9,10,8,7,8,9,10,10,9,8,9,9,11,11};
+
+static const uint8_t t9l_const[36] =
+{3,3,5,6,8,9,3,3,4,5,6,8,4,4,5,6,7,8,6,5,6,7,7,8,7,6,7,7,8,9,8,7,8,8,9,9};
+
+static const uint8_t t10l_const[64] =
+{1,3,6,8,9,9,9,10,3,4,6,7,8,9,8,8,6,6,7,8,9,10,9,9,7,7,8,9,10,10,9,10,8,8,9,10,
+ 10,10,10,10,9,9,10,10,11,11,10,11,8,8,9,10,10,10,11,11,9,8,9,10,10,11,11,11};
+
+static const uint8_t t11l_const[64] =
+{2,3,5,7,8,9,8,9,3,3,4,6,8,8,7,8,5,5,6,7,8,9,8,8,7,6,7,9,8,10,8,9,8,8,8,9,9,10,
+ 9,10,8,8,9,10,10,11,10,11,8,7,7,8,9,10,10,10,8,7,8,9,10,10,10,10};
+
+static const uint8_t t12l_const[64] =
+{4,3,5,7,8,9,9,9,3,3,4,5,7,7,8,8,5,4,5,6,7,8,7,8,6,5,6,6,7,8,8,8,7,6,7,7,8,
+ 8,8,9,8,7,8,8,8,9,8,9,8,7,7,8,8,9,9,10,9,8,8,9,9,9,9,10};
+
+static const uint8_t t13l_const[256] =
+{1,4,6,7,8,9,9,10,9,10,11,11,12,12,13,13,3,4,6,7,8,8,9,9,9,9,10,10,11,12,12,12,
+ 6,6,7,8,9,9,10,10,9,10,10,11,11,12,13,13,7,7,8,9,9,10,10,10,10,11,11,11,11,12,
+ 13,13,8,7,9,9,10,10,11,11,10,11,11,12,12,13,13,14,9,8,9,10,10,10,11,11,11,11,
+ 12,11,13,13,14,14,9,9,10,10,11,11,11,11,11,12,12,12,13,13,14,14,10,9,10,11,11,
+ 11,12,12,12,12,13,13,13,14,16,16,9,8,9,10,10,11,11,12,12,12,12,13,13,14,15,15,
+ 10,9,10,10,11,11,11,13,12,13,13,14,14,14,16,15,10,10,10,11,11,12,12,13,12,13,
+ 14,13,14,15,16,17,11,10,10,11,12,12,12,12,13,13,13,14,15,15,15,16,11,11,11,12,
+ 12,13,12,13,14,14,15,15,15,16,16,16,12,11,12,13,13,13,14,14,14,14,14,15,16,15,
+ 16,16,13,12,12,13,13,13,15,14,14,17,15,15,15,17,16,16,12,12,13,14,14,14,15,14,
+ 15,15,16,16,19,18,19,16};
+
+static const uint8_t t15l_const[256] =
+{3,4,5,7,7,8,9,9,9,10,10,11,11,11,12,13,4,3,5,6,7,7,8,8,8,9,9,10,10,10,11,11,5,
+ 5,5,6,7,7,8,8,8,9,9,10,10,11,11,11,6,6,6,7,7,8,8,9,9,9,10,10,10,11,11,11,7,6,
+ 7,7,8,8,9,9,9,9,10,10,10,11,11,11,8,7,7,8,8,8,9,9,9,9,10,10,11,11,11,12,9,7,8,
+ 8,8,9,9,9,9,10,10,10,11,11,12,12,9,8,8,9,9,9,9,10,10,10,10,10,11,11,11,12,9,8,
+ 8,9,9,9,9,10,10,10,10,11,11,12,12,12,9,8,9,9,9,9,10,10,10,11,11,11,11,12,12,
+ 12,10,9,9,9,10,10,10,10,10,11,11,11,11,12,13,12,10,9,9,9,10,10,10,10,11,11,11,
+ 11,12,12,12,13,11,10,9,10,10,10,11,11,11,11,11,11,12,12,13,13,11,10,10,10,10,
+ 11,11,11,11,12,12,12,12,12,13,13,12,11,11,11,11,11,11,11,12,12,12,12,13,13,12,
+ 13,12,11,11,11,11,11,11,12,12,12,12,12,13,13,13,13};
+
+static const uint8_t t16l_const[256] =
+{1,4,6,8,9,9,10,10,11,11,11,12,12,12,13,9,3,4,6,7,8,9,9,9,10,10,10,11,12,11,12,
+ 8,6,6,7,8,9,9,10,10,11,10,11,11,11,12,12,9,8,7,8,9,9,10,10,10,11,11,12,12,12,
+ 13,13,10,9,8,9,9,10,10,11,11,11,12,12,12,13,13,13,9,9,8,9,9,10,11,11,12,11,12,
+ 12,13,13,13,14,10,10,9,9,10,11,11,11,11,12,12,12,12,13,13,14,10,10,9,10,10,11,
+ 11,11,12,12,13,13,13,13,15,15,10,10,10,10,11,11,11,12,12,13,13,13,13,14,14,14,
+ 10,11,10,10,11,11,12,12,13,13,13,13,14,13,14,13,11,11,11,10,11,12,12,12,12,13,
+ 14,14,14,15,15,14,10,12,11,11,11,12,12,13,14,14,14,14,14,14,13,14,11,12,12,12,
+ 12,12,13,13,13,13,15,14,14,14,14,16,11,14,12,12,12,13,13,14,14,14,16,15,15,15,
+ 17,15,11,13,13,11,12,14,14,13,14,14,15,16,15,17,15,14,11,9,8,8,9,9,10,10,10,
+ 11,11,11,11,11,11,11,8};
+
+static const uint8_t t24l_const[256] =
+{4,4,6,7,8,9,9,10,10,11,11,11,11,11,12,9,4,4,5,6,7,8,8,9,9,9,10,10,10,10,10,8,
+ 6,5,6,7,7,8,8,9,9,9,9,10,10,10,11,7,7,6,7,7,8,8,8,9,9,9,9,10,10,10,10,7,8,7,7,
+ 8,8,8,8,9,9,9,10,10,10,10,11,7,9,7,8,8,8,8,9,9,9,9,10,10,10,10,10,7,9,8,8,8,8,
+ 9,9,9,9,10,10,10,10,10,11,7,10,8,8,8,9,9,9,9,10,10,10,10,10,11,11,8,10,9,9,9,
+ 9,9,9,9,9,10,10,10,10,11,11,8,10,9,9,9,9,9,9,10,10,10,10,10,11,11,11,8,11,9,9,
+ 9,9,10,10,10,10,10,10,11,11,11,11,8,11,10,9,9,9,10,10,10,10,10,10,11,11,11,11,
+ 8,11,10,10,10,10,10,10,10,10,10,11,11,11,11,11,8,11,10,10,10,10,10,10,10,11,
+ 11,11,11,11,11,11,8,12,10,10,10,10,10,10,11,11,11,11,11,11,11,11,8,8,7,7,7,7,
+ 7,7,7,7,7,7,8,8,8,8,4};
+
+static const struct huffcodetab ht_const[HTN] =
+{ { 0, NULL, NULL}, /* Apparently not used */
+ { 2, t1HB, t1l},
+ { 3, t2HB, t2l},
+ { 3, t3HB, t3l},
+ { 0, NULL, NULL}, /* Apparently not used */
+ { 4, t5HB, t5l},
+ { 4, t6HB, t6l},
+ { 6, t7HB, t7l},
+ { 6, t8HB, t8l},
+ { 6, t9HB, t9l},
+ { 8, t10HB, t10l},
+ { 8, t11HB, t11l},
+ { 8, t12HB, t12l},
+ {16, t13HB, t13l},
+ { 0, NULL, NULL}, /* Apparently not used */
+ {16, t15HB, t15l} };
+
+static const struct huffcodebig ht_big[HTN] =
+{ { 16, 1, 1 },
+ { 16, 2, 3 },
+ { 16, 3, 7 },
+ { 16, 4, 15 },
+ { 16, 6, 63 },
+ { 16, 8, 255 },
+ { 16, 10, 1023 },
+ { 16, 13, 8191 },
+ { 16, 4, 15 },
+ { 16, 5, 31 },
+ { 16, 6, 63 },
+ { 16, 7, 127 },
+ { 16, 8, 255 },
+ { 16, 9, 511 },
+ { 16, 11, 2047 },
+ { 16, 13, 8191 } };
+
+static const struct
+{
+ uint32_t region0_cnt;
+ uint32_t region1_cnt;
+} subdv_table[23] =
+{ {0, 0}, /* 0 bands */
+ {0, 0}, /* 1 bands */
+ {0, 0}, /* 2 bands */
+ {0, 0}, /* 3 bands */
+ {0, 0}, /* 4 bands */
+ {0, 1}, /* 5 bands */
+ {1, 1}, /* 6 bands */
+ {1, 1}, /* 7 bands */
+ {1, 2}, /* 8 bands */
+ {2, 2}, /* 9 bands */
+ {2, 3}, /* 10 bands */
+ {2, 3}, /* 11 bands */
+ {3, 4}, /* 12 bands */
+ {3, 4}, /* 13 bands */
+ {3, 4}, /* 14 bands */
+ {4, 5}, /* 15 bands */
+ {4, 5}, /* 16 bands */
+ {4, 6}, /* 17 bands */
+ {5, 6}, /* 18 bands */
+ {5, 6}, /* 19 bands */
+ {5, 7}, /* 20 bands */
+ {6, 7}, /* 21 bands */
+ {6, 7}, /* 22 bands */
+};
+
+static const uint32_t sfBand[6][23] =
+{
+/* Table B.2.b: 22.05 kHz */
+{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
+/* Table B.2.c: 24 kHz */
+{0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576},
+/* Table B.2.a: 16 kHz */
+{0,6,12,18,24,30,36,44,45,66,80,96,116,140,168,200,238,248,336,396,464,522,576},
+/* Table B.8.b: 44.1 kHz */
+{0,4, 8,12,16,20,24,30,36,44,52,62, 74, 90,110,134,162,196,238,288,342,418,576},
+/* Table B.8.c: 48 kHz */
+{0,4, 8,12,16,20,24,30,36,42,50,60, 72, 88,106,128,156,190,230,276,330,384,576},
+/* Table B.8.a: 32 kHz */
+{0,4, 8,12,16,20,24,30,36,44,54,66, 82,102,126,156,194,240,296,364,448,550,576} };
+
+
+static const short int2idx_const[4096] = /* int2idx[i] = sqrt(i*sqrt(i)); */
+{
+ 0, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 8, 8, 8, 9, 9,
+ 9, 10, 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16,
+ 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21,
+ 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26,
+ 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31,
+ 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 34, 35, 35, 35, 35, 36, 36, 36,
+ 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 38, 39, 39, 39, 39, 40, 40, 40, 40, 40,
+ 41, 41, 41, 41, 42, 42, 42, 42, 42, 43, 43, 43, 43, 44, 44, 44, 44, 44, 45, 45,
+ 45, 45, 45, 46, 46, 46, 46, 46, 47, 47, 47, 47, 47, 48, 48, 48, 48, 49, 49, 49,
+ 49, 49, 50, 50, 50, 50, 50, 51, 51, 51, 51, 51, 52, 52, 52, 52, 52, 53, 53, 53,
+ 53, 53, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 56, 56, 56, 56, 56, 57, 57, 57,
+ 57, 57, 58, 58, 58, 58, 58, 58, 59, 59, 59, 59, 59, 60, 60, 60, 60, 60, 61, 61,
+ 61, 61, 61, 62, 62, 62, 62, 62, 62, 63, 63, 63, 63, 63, 64, 64, 64, 64, 64, 65,
+ 65, 65, 65, 65, 65, 66, 66, 66, 66, 66, 67, 67, 67, 67, 67, 68, 68, 68, 68, 68,
+ 68, 69, 69, 69, 69, 69, 70, 70, 70, 70, 70, 70, 71, 71, 71, 71, 71, 72, 72, 72,
+ 72, 72, 72, 73, 73, 73, 73, 73, 74, 74, 74, 74, 74, 74, 75, 75, 75, 75, 75, 75,
+ 76, 76, 76, 76, 76, 77, 77, 77, 77, 77, 77, 78, 78, 78, 78, 78, 78, 79, 79, 79,
+ 79, 79, 80, 80, 80, 80, 80, 80, 81, 81, 81, 81, 81, 81, 82, 82, 82, 82, 82, 82,
+ 83, 83, 83, 83, 83, 84, 84, 84, 84, 84, 84, 85, 85, 85, 85, 85, 85, 86, 86, 86,
+ 86, 86, 86, 87, 87, 87, 87, 87, 87, 88, 88, 88, 88, 88, 88, 89, 89, 89, 89, 89,
+ 89, 90, 90, 90, 90, 90, 90, 91, 91, 91, 91, 91, 91, 92, 92, 92, 92, 92, 92, 93,
+ 93, 93, 93, 93, 93, 94, 94, 94, 94, 94, 94, 95, 95, 95, 95, 95, 95, 96, 96, 96,
+ 96, 96, 96, 97, 97, 97, 97, 97, 97, 98, 98, 98, 98, 98, 98, 99, 99, 99, 99, 99,
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+472,473,473,473,473,473,473,473,473,473,473,474,474,474,474,474,474,474,474,474,
+474,475,475,475,475,475,475,475,475,475,475,475,476,476,476,476,476,476,476,476,
+476,476,477,477,477,477,477,477,477,477,477,477,477,478,478,478,478,478,478,478,
+478,478,478,479,479,479,479,479,479,479,479,479,479,479,480,480,480,480,480,480,
+480,480,480,480,481,481,481,481,481,481,481,481,481,481,482,482,482,482,482,482,
+482,482,482,482,482,483,483,483,483,483,483,483,483,483,483,484,484,484,484,484,
+484,484,484,484,484,484,485,485,485,485,485,485,485,485,485,485,486,486,486,486,
+486,486,486,486,486,486,486,487,487,487,487,487,487,487,487,487,487,488,488,488,
+488,488,488,488,488,488,488,488,489,489,489,489,489,489,489,489,489,489,490,490,
+490,490,490,490,490,490,490,490,490,491,491,491,491,491,491,491,491,491,491,492,
+492,492,492,492,492,492,492,492,492,492,493,493,493,493,493,493,493,493,493,493,
+494,494,494,494,494,494,494,494,494,494,494,495,495,495,495,495,495,495,495,495,
+495,496,496,496,496,496,496,496,496,496,496,496,497,497,497,497,497,497,497,497,
+497,497,497,498,498,498,498,498,498,498,498,498,498,499,499,499,499,499,499,499,
+499,499,499,499,500,500,500,500,500,500,500,500,500,500,501,501,501,501,501,501,
+501,501,501,501,501,502,502,502,502,502,502,502,502,502,502,503,503,503,503,503,
+503,503,503,503,503,503,504,504,504,504,504,504,504,504,504,504,504,505,505,505,
+505,505,505,505,505,505,505,506,506,506,506,506,506,506,506,506,506,506,507,507,
+507,507,507,507,507,507,507,507,507,508,508,508,508,508,508,508,508,508,508,509,
+509,509,509,509,509,509,509,509,509,509,510,510,510,510,510,510,510,510,510,510,
+510,511,511,511,511,511,511,511,511,511,511,512,512,512,512,512 };
+
+static const int order[32] =
+{ 0, 1, 16, 17, 8, 9, 24, 25, 4, 5, 20, 21, 12, 13, 28, 29,
+ 2, 3, 18, 19,10,11, 26, 27, 6, 7, 22, 23, 14, 15, 30, 31 };
+
+static const unsigned long sampr_index[2][3] =
+{ { 22050, 24000, 16000 }, /* MPEG 2 */
+ { 44100, 48000, 32000 } }; /* MPEG 1 */
+
+static const long bitr_index[2][15] =
+{ {0, 8,16,24,32,40,48,56, 64, 80, 96,112,128,144,160}, /* MPEG 2 */
+ {0,32,40,48,56,64,80,96,112,128,160,192,224,256,320} }; /* MPEG 1 */
+
+static const int num_bands[3][15] =
+{ {0,10,10,10,10,12,14,16, 20, 22, 24, 26, 28, 30, 32},
+ {0,10,10,10,10,10,12,14, 18, 24, 26, 28, 30, 32, 32},
+ {0,10,12,14,18,24,26,28, 30, 32, 32, 32, 32, 32, 32} };
+
+static const int cx_const[9] =
+{ 16135, 10531, 5604, 15396, -2845,-12551, 14189, 8192, 16384 };
+
+static const int ca_const[8] =
+{-16859,-15458,-10269, -5961, -3099, -1342, -465, -121 };
+
+static const int cs_const[8] =
+{ 28098, 28893, 31117, 32221, 32621, 32740, 32765, 32768 };
+
+static const short enwindow_const[15*27+24] =
+{ 0, 65, 593, 1766, 22228, 2115, 611, 62,
+ 8, 119, 1419, 10564,-11659,-1635,-154, -9,
+ -8, -119,-1419,-10564, 11659, 1635, 154, 9, 464, 100, 91,
+ 0, 69, 604, 1635, 23148, 2363, 643, 62,
+ 7, 107, 1368, 10449,-12733,-1818,-180,-11,
+ -7, -107,-1368,-10449, 12733, 1818, 180, 11, 420, 200, 164,
+ 0, 72, 608, 1465, 23979, 2600, 671, 63,
+ 7, 94, 1305, 10265,-13818,-2004,-207,-12,
+ -7, -94,-1305,-10265, 13818, 2004, 207, 12, 380, 297, 220,
+ 0, 76, 606, 1256, 24718, 2825, 693, 63,
+ 6, 81, 1232, 10016,-14908,-2192,-236,-14,
+ -6, -81,-1232,-10016, 14908, 2192, 236, 14, 342, 392, 262,
+ 0, 78, 597, 1007, 25359, 3033, 712, 63,
+ 6, 68, 1150, 9706,-15995,-2380,-267,-15,
+ -6, -68,-1150, -9706, 15995, 2380, 267, 15, 307, 483, 289,
+ 0, 80, 580, 719, 25901, 3224, 726, 62,
+ 6, 54, 1060, 9343,-17072,-2565,-299,-17,
+ -6, -54,-1060, -9343, 17072, 2565, 299, 17, 274, 569, 304,
+ -1, 82, 555, 391, 26339, 3395, 735, 61,
+ 5, 40, 963, 8930,-18131,-2747,-332,-19,
+ -5, -40, -963, -8930, 18131, 2747, 332, 19, 242, 650, 307,
+ -1, 83, 523, 26, 26672, 3545, 740, 60,
+ 5, 27, 861, 8474,-19164,-2923,-366,-21,
+ -5, -27, -861, -8474, 19164, 2923, 366, 21, 212, 724, 300,
+ -1, 83, 482, -376, 26900, 3672, 739, 58,
+ 4, 14, 756, 7981,-20163,-3092,-401,-24,
+ -4, -14, -756, -7981, 20163, 3092, 401, 24, 183, 792, 283,
+ -1, 82, 433, -812, 27022, 3776, 735, 56,
+ 4, 1, 648, 7456,-21122,-3250,-435,-26,
+ -4, -1, -648, -7456, 21122, 3250, 435, 26, 155, 851, 258,
+ -1, 81, 376, -1281, 27038, 3855, 726, 54,
+ 3, -11, 539, 6907,-22032,-3397,-470,-28,
+ -3, 11, -539, -6907, 22032, 3397, 470, 28, 128, 903, 226,
+ -1, 78, 312, -1778, 26951, 3910, 713, 52,
+ 3, -22, 430, 6338,-22887,-3530,-503,-31,
+ -3, 22, -430, -6338, 22887, 3530, 503, 31, 102, 946, 188,
+ -2, 75, 239, -2302, 26761, 3941, 696, 49,
+ 3, -33, 322, 5757,-23678,-3648,-537,-34,
+ -3, 33, -322, -5757, 23678, 3648, 537, 34, 76, 980, 145,
+ -2, 70, 160, -2848, 26472, 3948, 676, 47,
+ 3, -42, 217, 5167,-24399,-3749,-568,-36,
+ -3, 42, -217, -5167, 24399, 3749, 568, 36, 50, 1004, 99,
+ -2, 65, 74, -3412, 26087, 3931, 653, 44,
+ 2, -51, 115, 4577,-25045,-3830,-599,-39,
+ -2, 51, -115, -4577, 25045, 3830, 599, 39, 25, 1019, 50,
+
+ 25610,3891,627,42,-3990,-18,58,-2,
+ 21226,-21226,10604,-10604,1860,-1860,1458,-1458,576,-576,130,-130,60,-60,8,-8
+};
+
+static const int win_const[18][4] = {
+ { -3072, -134, -146, 3352 },
+ { -2747, -362, -471, 3579 },
+ { -2387, -529, -831, 3747 },
+ { -2004, -632,-1214, 3850 },
+ { -1609, -666,-1609, 3884 },
+ { -1214, -632,-2004, 3850 },
+ { -831, -529,-2387, 3747 },
+ { -471, -362,-2747, 3579 },
+ { -146, -134,-3072, 3352 },
+ { 134,-3072,-3352, -146 },
+ { 362,-2747,-3579, -471 },
+ { 529,-2387,-3747, -831 },
+ { 632,-2004,-3850,-1214 },
+ { 666,-1609,-3884,-1609 },
+ { 632,-1214,-3850,-2004 },
+ { 529, -831,-3747,-2387 },
+ { 362, -471,-3579,-2747 },
+ { 134, -146,-3352,-3072 } };
+
+/* forward declarations */
+static int HuffmanCode( short *ix, char *xr_sign, uint32_t begin, uint32_t end, int table);
+static int HuffmanCod1( short *ix, char *xr_sign, uint32_t begin, uint32_t end, int table);
+static void putbits(uint32_t val, uint32_t nbit);
+static int find_best_2( short *ix, uint32_t start, uint32_t end, const uint32_t *table,
+ uint32_t len, int *bits);
+static int find_best_3( short *ix, uint32_t start, uint32_t end, const uint32_t *table,
+ uint32_t len, int *bits);
+static int count_bit1 ( short *ix, uint32_t start, uint32_t end, int *bits );
+static int count_bigv ( short *ix, uint32_t start, uint32_t end, int table0, int table1,
+ int *bits);
+
+/* implementations */
+static void encodeSideInfo( side_info_t si[2][2] )
+{
+ int gr, ch, header;
+ uint32_t cc=0, sz=0;
+
+ /*
+ * MPEG header layout:
+ * AAAAAAAA AAABBCCD EEEEFFGH IIJJKLMM
+ * A (31-21) = frame sync
+ * B (20-19) = MPEG type
+ * C (18-17) = MPEG layer
+ * D (16) = protection bit
+ * E (15-12) = bitrate index
+ * F (11-10) = samplerate index
+ * G (9) = padding bit
+ * H (8) = private bit
+ * I (7-6) = channel mode
+ * J (5-4) = mode extension (jstereo only)
+ * K (3) = copyright bit
+ * L (2) = original
+ * M (1-0) = emphasis
+ */
+
+ header = (0xfff00000) | /* frame sync (AAAAAAAAA AAA)
+ mp3 type (upper): 1 (B) */
+ (0x01 << 17) | /* mp3 layer: 01 (CC) */
+ ( 0x1 << 16) | /* mp3 crc: 1 (D) */
+ ( 0x1 << 2); /* mp3 org: 1 (L) */
+ header |= cfg.mpg.type << 19;
+ header |= cfg.mpg.bitr_id << 12;
+ header |= cfg.mpg.smpl_id << 10;
+ header |= cfg.mpg.padding << 9;
+ header |= cfg.mpg.mode << 6;
+ /* no emphasis (bits 0-1) */
+ putbits( header, 32 );
+
+ if(cfg.mpg.type == 1)
+ { /* MPEG1 */
+ if(cfg.channels == 2) { putlong( 0, 20); }
+ else { putlong( 0, 18); }
+
+ for(gr=0; gr<cfg.granules; gr++)
+ for(ch=0; ch<cfg.channels; ch++)
+ {
+ side_info_t *gi = &si[gr][ch];
+
+ putlong((gi->part2_3_length+42),12 ); /* add scale_facs array size */
+ putlong( gi->address3>>1, 9 );
+ putlong( gi->global_gain, 8 );
+ putlong( 9, 4 ); /* set scale_facs compr type */
+ putlong( gi->table_select[0], 6 );
+ putlong( gi->table_select[1], 5 );
+ putlong( gi->table_select[2], 5 );
+ putlong( gi->region_0_1, 7 );
+ putlong( 1 , 2 ); /* set scale_facs to 1bit */
+ putlong( gi->table_select[3], 1 );
+ }
+ }
+ else
+ { /* MPEG2 */
+ if(cfg.channels == 2) { putlong( 0, 10); }
+ else { putlong( 0, 9); }
+
+ for(ch=0; ch<cfg.channels; ch++)
+ {
+ side_info_t *gi = &si[0][ch];
+
+ putlong((gi->part2_3_length+42),12 ); /* add scale_facs array size */
+ putlong( gi->address3>>1, 9 );
+ putlong( gi->global_gain, 8 );
+ putlong( 0xCA, 9 ); /* set scale_facs compr type */
+ putlong( gi->table_select[0], 6 );
+ putlong( gi->table_select[1], 5 );
+ putlong( gi->table_select[2], 5 );
+ putlong( gi->region_0_1 , 7 );
+ putlong( 1 , 1 ); /* set scale_facs to 1bit */
+ putlong( gi->table_select[3], 1 );
+ }
+ }
+ /* flush remaining bits */
+ putbits(cc, sz);
+}
+
+/* Note the discussion of huffmancodebits() on pages 28 and 29 of the IS,
+ as well as the definitions of the side information on pages 26 and 27. */
+static void Huffmancodebits( short *ix, char *xr_sign, side_info_t *gi )
+{
+ int region1 = gi->address1;
+ int region2 = gi->address2;
+ int bigvals = gi->address3;
+ int count1 = bigvals + (gi->count1 << 2);
+ int stuffBits = 0;
+ int bits = 0;
+ int i, v;
+
+ for(i=v=0; i<32; i+=2)
+ v |= band_scale_f[i>>1] << (30-i);
+ putbits(v, 32); // store scale_facs (part1)
+
+ for(v=0; i<42; i+=2)
+ v |= band_scale_f[i>>1] << (40-i);
+ putbits(v, 10); // store scale_facs (part2)
+
+ if(region1 > 0)
+ bits += HuffmanCode(ix, xr_sign, 0 , region1, gi->table_select[0]);
+
+ if(region2 > region1)
+ bits += HuffmanCode(ix, xr_sign, region1, region2, gi->table_select[1]);
+
+ if(bigvals > region2)
+ bits += HuffmanCode(ix, xr_sign, region2, bigvals, gi->table_select[2]);
+
+ if(count1 > bigvals)
+ bits += HuffmanCod1(ix, xr_sign, bigvals, count1, gi->table_select[3]);
+
+ if((stuffBits = gi->part2_3_length - bits) > 0)
+ {
+ int stuffWords = stuffBits >> 5;
+ int remainBits = stuffBits & 31;
+
+ if( remainBits )
+ putbits( ~0, remainBits );
+
+ while( stuffWords-- )
+ putbits( ~0, 32 ); /* Huffman code tables leed to padding ones */
+ }
+}
+
+int HuffmanCod1( short *ix, char *xr_sign, uint32_t begin, uint32_t end, int tbl)
+{
+ uint32_t cc=0, sz=0;
+ uint32_t i, d, p;
+ int sumbit=0, s=0, l=0, v, w, x, y;
+ #define sgnv xr_sign[i+0]
+ #define sgnw xr_sign[i+1]
+ #define sgnx xr_sign[i+2]
+ #define sgny xr_sign[i+3]
+
+ for(i=begin; i<end; i+=4)
+ {
+ v = ix[i+0];
+ w = ix[i+1];
+ x = ix[i+2];
+ y = ix[i+3];
+ p = (v << 3) + (w << 2) + (x << 1) + y;
+
+ switch(p)
+ {
+ case 0: l=0; s = 0; break;
+ case 1: l=1; s = sgny; break;
+ case 2: l=1; s = sgnx; break;
+ case 3: l=2; s = (sgnx << 1) + sgny; break;
+ case 4: l=1; s = sgnw; break;
+ case 5: l=2; s = (sgnw << 1) + sgny; break;
+ case 6: l=2; s = (sgnw << 1) + sgnx; break;
+ case 7: l=3; s = (sgnw << 2) + (sgnx << 1) + sgny; break;
+ case 8: l=1; s = sgnv; break;
+ case 9: l=2; s = (sgnv << 1) + sgny; break;
+ case 10: l=2; s = (sgnv << 1) + sgnx; break;
+ case 11: l=3; s = (sgnv << 2) + (sgnx << 1) + sgny; break;
+ case 12: l=2; s = (sgnv << 1) + sgnw; break;
+ case 13: l=3; s = (sgnv << 2) + (sgnw << 1) + sgny; break;
+ case 14: l=3; s = (sgnv << 2) + (sgnw << 1) + sgnx; break;
+ case 15: l=4; s = (sgnv << 3) + (sgnw << 2) + (sgnx << 1) + sgny; break;
+ }
+
+ d = (ht_count[tbl][0][p] << l) + s;
+ l = ht_count[tbl][1][p];
+ putlong( d, l );
+ sumbit += l;
+ }
+
+ /* flush remaining bits */
+ putbits(cc, sz);
+
+ return sumbit;
+}
+
+/* Implements the pseudocode of page 98 of the IS */
+int HuffmanCode(short *ix, char *xr_sign, uint32_t begin, uint32_t end, int table)
+{
+ uint32_t cc=0, sz=0, code;
+ uint32_t i, xl=0, yl=0, idx;
+ int x, y, bit, sumbit=0;
+ #define sign_x xr_sign[i+0]
+ #define sign_y xr_sign[i+1]
+
+ if(table == 0)
+ return 0;
+
+ if( table > 15 )
+ { /* ESC-table is used */
+ uint32_t linbits = ht_big[table-16].linbits;
+ uint16_t *hffcode = table < 24 ? t16HB : t24HB;
+ uint8_t *hlen = table < 24 ? t16l : t24l;
+
+ for(i=begin; i<end; i+=2)
+ {
+ x = ix[ i ];
+ y = ix[i+1];
+
+ if(x > 14) { xl = x - 15; x = 15; }
+ if(y > 14) { yl = y - 15; y = 15; }
+
+ idx = x * 16 + y;
+ code = hffcode[idx];
+ bit = hlen [idx];
+
+ if(x)
+ {
+ if(x > 14)
+ {
+ code = (code << linbits) | xl;
+ bit += linbits;
+ }
+
+ code = (code << 1) | sign_x;
+ bit += 1;
+ }
+
+ if(y)
+ {
+ if(y > 14)
+ {
+ if(bit + linbits + 1 > 32)
+ {
+ putlong( code, bit );
+ sumbit += bit;
+ code = bit = 0;
+ }
+
+ code = (code << linbits) | yl;
+ bit += linbits;
+ }
+
+ code = (code << 1) | sign_y;
+ bit += 1;
+ }
+
+ putlong( code, bit );
+ sumbit += bit;
+ }
+ }
+ else
+ { /* No ESC-words */
+ const struct huffcodetab *h = &ht[table];
+
+ for(i=begin; i<end; i+=2)
+ {
+ x = ix[i];
+ y = ix[i+1];
+
+ idx = x * h->len + y;
+ code = h->table[idx];
+ bit = h->hlen [idx];
+
+ if(x)
+ {
+ code = (code << 1) | sign_x;
+ bit += 1;
+ }
+
+ if(y)
+ {
+ code = (code << 1) | sign_y;
+ bit += 1;
+ }
+
+ putlong( code, bit );
+ sumbit += bit;
+ }
+ }
+
+ /* flush remaining bits */
+ putbits(cc, sz);
+
+ return sumbit;
+}
+
+void putbits(uint32_t val, uint32_t nbit)
+{
+ int new_bitpos = CodedData.bitpos + nbit;
+ int ptrpos = CodedData.bitpos >> 5;
+
+ val = val & (0xffffffff >> (32 - nbit));
+
+ /* data fit in one uint32_t */
+ if(((new_bitpos - 1) >> 5) == ptrpos)
+ CodedData.bbuf[ptrpos] |= val << ((32 - new_bitpos) & 31);
+ else
+ {
+ CodedData.bbuf[ptrpos ] |= val >> ((new_bitpos - 32) & 31);
+ CodedData.bbuf[ptrpos+1] |= val << ((32 - new_bitpos) & 31);
+ }
+
+ CodedData.bitpos = new_bitpos;
+}
+
+/***************************************************************************/
+/* Choose the Huffman table that will encode ix[begin..end] with */
+/* the fewest bits. */
+/* Note: This code contains knowledge about the sizes and characteristic */
+/* of the Huffman tables as defined in the IS (Table B.7), and will not */
+/* work with any arbitrary tables. */
+/***************************************************************************/
+static int choose_table( short *ix, uint32_t begin, uint32_t end, int *bits )
+{
+ uint32_t i;
+ int max, table0, table1;
+
+ for(i=begin,max=0; i<end; i++)
+ if(ix[i] > max)
+ max = ix[i];
+
+ if(max < 16)
+ {
+ /* tables without linbits */
+ /* indx: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 */
+ /* len: 0, 2, 3, 3, 0, 4, 4, 6, 6, 6, 8, 8, 8, 16, 0, 16 */
+ switch(max)
+ {
+ case 0: return 0;
+ case 1: return count_bit1(ix, begin, end, bits);
+ case 2: return 2 + find_best_2(ix, begin, end, tab23, 3, bits);
+ case 3: return 5 + find_best_2(ix, begin, end, tab56, 4, bits);
+ case 4:
+ case 5: return 7 + find_best_3(ix, begin, end, tab789, 6, bits);
+ case 6:
+ case 7: return 10 + find_best_3(ix, begin, end, tabABC, 8, bits);
+ default: return 13 + find_best_2(ix, begin, end, tab1315, 16, bits) * 2;
+ }
+ }
+ else
+ {
+ /* tables with linbits */
+ max -= 15;
+
+ for(table0=0; table0<8; table0++)
+ if(ht_big[table0].linmax >= max)
+ break;
+
+ for(table1=8; table1<16; table1++)
+ if(ht_big[table1].linmax >= max)
+ break;
+
+ return 16 + count_bigv(ix, begin, end, table0, table1, bits);
+ }
+}
+
+int find_best_2(short *ix, uint32_t start, uint32_t end, const uint32_t *table,
+ uint32_t len, int *bits)
+{
+ uint32_t i, sum = 0;
+
+ for(i=start; i<end; i+=2)
+ sum += table[ix[i] * len + ix[i+1]];
+
+ if((sum & 0xffff) <= (sum >> 16))
+ {
+ *bits = (sum & 0xffff);
+ return 1;
+ }
+ else
+ {
+ *bits = sum >> 16;
+ return 0;
+ }
+}
+
+int find_best_3(short *ix, uint32_t start, uint32_t end, const uint32_t *table,
+ uint32_t len, int *bits)
+{
+ uint32_t i, j, sum = 0;
+ int sum1 = 0;
+ int sum2 = 0;
+ int sum3 = 0;
+
+ /* avoid overflow in packed additions: 78*13 < 1024 */
+ for(i=start; i<end; )
+ {
+ j = i + 2*78 > end ? end : i + 2*78;
+
+ for(sum=0; i<j; i+=2)
+ sum += table[ix[i] * len + ix[i+1]];
+
+ sum1 += (sum >> 20);
+ sum2 += (sum >> 10) & 0x3ff;
+ sum3 += (sum >> 0) & 0x3ff;
+ }
+
+ i = 0;
+ if(sum1 > sum2) { sum1 = sum2; i = 1; }
+ if(sum1 > sum3) { sum1 = sum3; i = 2; }
+
+ *bits = sum1;
+
+ return i;
+}
+
+/*************************************************************************/
+/* Function: Count the number of bits necessary to code the subregion. */
+/*************************************************************************/
+int count_bit1(short *ix, uint32_t start, uint32_t end, int *bits )
+{
+ uint32_t i, sum = 0;
+
+ for(i=start; i<end; i+=2)
+ sum += t1l[4 + ix[i] * 2 + ix[i+1]];
+
+ *bits = sum;
+
+ return 1; /* this is table1 */
+}
+
+int count_bigv(short *ix, uint32_t start, uint32_t end, int table0,
+ int table1, int *bits )
+{
+ uint32_t i, sum0, sum1, sum=0, bigv=0, x, y;
+
+ /* ESC-table is used */
+ for(i=start; i<end; i+=2)
+ {
+ x = ix[i];
+ y = ix[i+1];
+
+ if(x > 14) { x = 15; bigv++; }
+ if(y > 14) { y = 15; bigv++; }
+
+ sum += tab1624[x * 16 + y];
+ }
+
+ sum0 = (sum >> 16) + bigv * ht_big[table0].linbits;
+ sum1 = (sum & 0xffff) + bigv * ht_big[table1].linbits;
+
+ if(sum0 <= sum1)
+ {
+ *bits = sum0;
+ return table0;
+ }
+ else
+ {
+ *bits = sum1;
+ return table1;
+ }
+}
+
+/*************************************************************************/
+/* Function: Calculation of rzero, count1, address3 */
+/* (Partitions ix into big values, quadruples and zeros). */
+/*************************************************************************/
+static int calc_runlen( short *ix, side_info_t *si )
+{
+ int p, i, sum = 0;
+
+ for(i=SAMPL2; i-=2; )
+ if(*(uint32_t*)&ix[i-2]) /* !!!! short *ix; !!!!! */
+ break;
+
+ si->count1 = 0;
+
+ for( ; i>3; i-=4)
+ {
+ int v = ix[i-1];
+ int w = ix[i-2];
+ int x = ix[i-3];
+ int y = ix[i-4];
+
+ if((v | w | x | y) <= 1)
+ {
+ p = (y<<3) + (x<<2) + (w<<1) + (v);
+
+ sum += tab01[p];
+
+ si->count1++;
+ }
+ else break;
+ }
+
+ si->address3 = i;
+
+ if((sum >> 16) < (sum & 0xffff))
+ {
+ si->table_select[3] = 0;
+ return sum >> 16;
+ }
+ else
+ {
+ si->table_select[3] = 1;
+ return sum & 0xffff;
+ }
+}
+
+
+/*************************************************************************/
+/* Function: Quantization of the vector xr ( -> ix) */
+/*************************************************************************/
+static int quantize_int(int *xr, short *ix, side_info_t *si)
+{
+ unsigned int i, idx, s, frac_pow[] = { 0x10000, 0xd745, 0xb505, 0x9838 };
+
+ s = frac_pow[si->quantStep & 3] >> si->quantStep / 4;
+
+ /* check for possible 'out of range' values */
+ if(((si->max_val + 256) >> 8) * s >= (65536 << 8))
+ return 0;
+
+ if(((si->max_val + 256) >> 8) * s < (4096 << 8))
+ { /* all values fit the table size */
+ for(i=SAMPL2; i--; )
+ ix[i] = int2idx[(xr[i] * s + 0x8000) >> 16];
+ }
+ else
+ { /* check each index wether it fits the table */
+ for(i=SAMPL2; i--; )
+ {
+ idx = (xr[i] * s + 0x08000) >> 16;
+
+ if(idx > 4095) ix[i] = int2idx[(idx + 8) >> 4] << 3;
+ else ix[i] = int2idx[idx];
+ }
+ }
+
+ return 1;
+}
+
+/*************************************************************************/
+/* subdivides the bigvalue region which will use separate Huffman tables */
+/*************************************************************************/
+static void subdivide(side_info_t *si)
+{
+ int scfb, count0, count1;
+
+ if( !si->address3 )
+ { /* no bigvalue region */
+ si->region_0_1 = 0;
+ si->address1 = 0;
+ si->address2 = 0;
+ }
+ else
+ {
+ /* Calculate scale factor band index */
+ for(scfb=0; scalefac[scfb] < si->address3; )
+ scfb++;
+
+ count0 = subdv_table[scfb].region0_cnt;
+ count1 = subdv_table[scfb].region1_cnt;
+
+ si->region_0_1 = (count0 << 3) | count1;
+ si->address1 = scalefac[count0 + 1];
+ si->address2 = scalefac[count0 + 1 + count1 + 1];
+ }
+}
+
+/*******************************************************************/
+/* Count the number of bits necessary to code the bigvalues region */
+/*******************************************************************/
+static int bigv_bitcount(short *ix, side_info_t *gi)
+{
+ int b1=0, b2=0, b3=0;
+
+ /* Select huffman code tables for bigvalues regions */
+ gi->table_select[0] = 0;
+ gi->table_select[1] = 0;
+ gi->table_select[2] = 0;
+
+ if( gi->address1 > 0 ) /* region0 */
+ gi->table_select[0] = choose_table(ix, 0 , gi->address1, &b1);
+
+ if( gi->address2 > gi->address1 ) /* region1 */
+ gi->table_select[1] = choose_table(ix, gi->address1, gi->address2, &b2);
+
+ if( gi->address3 > gi->address2 ) /* region2 */
+ gi->table_select[2] = choose_table(ix, gi->address2, gi->address3, &b3);
+
+ return b1+b2+b3;
+}
+
+static int quantize_and_count_bits(int *xr, short *ix, side_info_t *si)
+{
+ int bits = 10000;
+
+ if(quantize_int(xr, ix, si))
+ {
+ bits = calc_runlen(ix, si); /* rzero,count1,address3 */
+ subdivide(si); /* bigvalues sfb division */
+ bits += bigv_bitcount(ix,si); /* bit count */
+ }
+
+ return bits;
+}
+
+/************************************************************************/
+/* The code selects the best quantStep for a particular set of scalefacs*/
+/************************************************************************/
+static int inner_loop(int *xr, int max_bits, side_info_t *si)
+{
+ int bits;
+
+ while((bits=quantize_and_count_bits(xr, enc_data, si)) < max_bits-64)
+ {
+ if(si->quantStep == 0)
+ break;
+
+ if(si->quantStep <= 2)
+ si->quantStep = 0;
+ else
+ si->quantStep -= 2;
+ }
+
+ while(bits > max_bits)
+ {
+ si->quantStep++;
+ bits = quantize_and_count_bits(xr, enc_data, si);
+ }
+
+ return bits;
+}
+
+static void iteration_loop(int *xr, side_info_t *si, int gr_cnt)
+{
+ int remain, tar_bits, max_bits = cfg.mean_bits;
+
+ /* distribute reserved bits to remaining granules */
+ tar_bits = max_bits + (cfg.ResvSize / gr_cnt & ~7);
+ if(tar_bits > max_bits + max_bits/2)
+ tar_bits = max_bits + max_bits/2;
+
+ si->part2_3_length = inner_loop(xr, tar_bits, si);
+ si->global_gain = si->quantStep + 142 - si->additStep;
+
+ /* unused bits of the reservoir can be used for remaining granules */
+ cfg.ResvSize += max_bits - si->part2_3_length;
+
+ /* end: distribute the reserved bits to one or two granules */
+ if(gr_cnt == 1)
+ {
+ si->part2_3_length += cfg.ResvSize;
+ /* mp3 format allows max 12bits for granule length */
+ if(si->part2_3_length > 4092)
+ {
+ remain = (si->part2_3_length - 4092 + 31) >> 5;
+ si->part2_3_length -= remain << 5;
+ si[-1].part2_3_length += remain << 5;
+
+ while(remain--)
+ putbits(~0, 32);
+ }
+ }
+}
+
+/* returns sum_j=0^31 a[j]*cos(PI*j*(k+1/2)/32), 0<=k<32 */
+static void window_subband1(short *wk, int sb0[SBLIMIT], int sb1[SBLIMIT])
+{
+ int k, i, u, v;
+ short *wp, *x1, *x2;
+
+#ifdef CPU_COLDFIRE
+ int s0, s1, t0, t1;
+
+ for(k=0; k<18; k++, wk+=64, sb0+=SBLIMIT, sb1+=SBLIMIT)
+ {
+ wp = enwindow;
+ x1 = wk;
+ x2 = x1 - 124;
+
+ for(i=-15; i<0; i++)
+ {
+ asm volatile(
+ "move.l (-224*4,%[x2]), %%d4\n" /* d4 = x2[-224] */
+ "movem.l (%[wp]), %%d0-%%d3\n" /* load 8 values */
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, (-160*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d0l, %%d4u, %%acc0\n"
+ "mac.w %%d0l, %%d4l, ( -96*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d1u, %%d4u, %%acc0\n"
+ "mac.w %%d1u, %%d4l, ( -32*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d1l, %%d4u, %%acc0\n"
+ "mac.w %%d1l, %%d4l, ( 32*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, ( 96*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d2l, %%d4u, %%acc0\n"
+ "mac.w %%d2l, %%d4l, ( 160*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d3u, %%d4u, %%acc0\n"
+ "mac.w %%d3u, %%d4l, ( 224*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d3l, %%d4u, %%acc0\n"
+ "mac.w %%d3l, %%d4l, (-256*4,%[x1]), %%d4, %%acc1\n"
+ "movem.l (16,%[wp]), %%d0-%%d3\n" /* load 8 values */
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, (-192*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d0l, %%d4u, %%acc0\n"
+ "mac.w %%d0l, %%d4l, (-128*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1u, %%d4u, %%acc0\n"
+ "mac.w %%d1u, %%d4l, ( -64*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1l, %%d4u, %%acc0\n"
+ "mac.w %%d1l, %%d4l, ( 0*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, ( 64*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2l, %%d4u, %%acc0\n"
+ "mac.w %%d2l, %%d4l, ( 128*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3u, %%d4u, %%acc0\n"
+ "mac.w %%d3u, %%d4l, ( 192*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3l, %%d4u, %%acc0\n"
+ "mac.w %%d3l, %%d4l, ( 224*4,%[x1]), %%d4, %%acc1\n"
+ "movclr.l %%acc0, %%d0\n"
+ "move.l %%d0, %[s0]\n"
+ "movclr.l %%acc1, %%d0\n"
+ "move.l %%d0, %[s1]\n"
+
+ "movem.l (%[wp]), %%d0-%%d3\n" /* load 8 values */
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, ( 160*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d0l, %%d4u, %%acc0\n"
+ "mac.w %%d0l, %%d4l, ( 96*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1u, %%d4u, %%acc0\n"
+ "mac.w %%d1u, %%d4l, ( 32*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1l, %%d4u, %%acc0\n"
+ "mac.w %%d1l, %%d4l, ( -32*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, ( -96*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2l, %%d4u, %%acc0\n"
+ "mac.w %%d2l, %%d4l, (-160*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3u, %%d4u, %%acc0\n"
+ "mac.w %%d3u, %%d4l, (-224*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3l, %%d4u, %%acc0\n"
+ "mac.w %%d3l, %%d4l, ( 256*4,%[x2]), %%d4, %%acc1\n"
+ "movem.l (32,%[wp]), %%d0-%%d3\n" /* load 8 values */
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, ( 192*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d0l, %%d4u, %%acc0\n"
+ "mac.w %%d0l, %%d4l, ( 128*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d1u, %%d4u, %%acc0\n"
+ "mac.w %%d1u, %%d4l, ( 64*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d1l, %%d4u, %%acc0\n"
+ "mac.w %%d1l, %%d4l, ( 0*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, ( -64*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d2l, %%d4u, %%acc0\n"
+ "mac.w %%d2l, %%d4l, (-128*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d3u, %%d4u, %%acc0\n"
+ "mac.w %%d3u, %%d4l, (-192*4,%[x2]), %%d4, %%acc1\n"
+ "mac.w %%d3l, %%d4u, %%acc0\n"
+ "mac.w %%d3l, %%d4l, %%acc1\n"
+ "movclr.l %%acc0, %%d0\n"
+ "move.l %%d0, %[t0]\n"
+ "movclr.l %%acc1, %%d0\n"
+ "move.l %%d0, %[t1]\n"
+
+ : [x1] "+a" (x1), [x2] "+a" (x2), [s0] "+m" (s0), [t0] "+m" (t0),
+ [s1] "+m" (s1), [t1] "+m" (t1)
+ : [wp] "a" (wp) : "d0", "d1", "d2", "d3", "d4");
+
+ sb0[30+i*2] = shft4(t0) + shft13(s0) * wp[24];
+ sb0[31+i*2] = shft13(t0) * wp[25] - shft13(s0) * wp[26];
+ sb1[30+i*2] = shft4(t1) + shft13(s1) * wp[24];
+ sb1[31+i*2] = shft13(t1) * wp[25] - shft13(s1) * wp[26];
+ wp += 27;
+ x1 -= 2;
+ x2 += 2;
+ }
+
+ asm volatile(
+ "move.l ( -32*4,%[x1]), %%d4\n" /* d4 = x1[-32] */
+ "movem.l (%[wp]), %%d0-%%d3\n" /* load 8 values */
+
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, ( -96*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d0l, %%d4u, %%acc0\n"
+ "mac.w %%d0l, %%d4l, (-160*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1u, %%d4u, %%acc0\n"
+ "mac.w %%d1u, %%d4l, (-224*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1l, %%d4u, %%acc0\n"
+ "mac.w %%d1l, %%d4l, ( 32*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, ( 96*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2l, %%d4u, %%acc0\n"
+ "mac.w %%d2l, %%d4l, ( 160*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3u, %%d4u, %%acc0\n"
+ "mac.w %%d3u, %%d4l, ( 224*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3l, %%d4u, %%acc0\n"
+ "mac.w %%d3l, %%d4l, ( -16*4,%[x1]), %%d4, %%acc1\n"
+ "movclr.l %%acc0, %%d0\n"
+ "move.l %%d0, %[s0]\n"
+ "movclr.l %%acc1, %%d0\n"
+ "move.l %%d0, %[s1]\n"
+
+ "movem.l (16,%[wp]), %%d0-%%d3\n" /* load 8 values */
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, ( -48*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1u, %%d4u, %%acc0\n"
+ "mac.w %%d1u, %%d4l, ( 16*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1l, %%d4u, %%acc0\n"
+ "mac.w %%d1l, %%d4l, ( -80*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, ( 48*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, (-112*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3u, %%d4u, %%acc0\n"
+ "mac.w %%d3u, %%d4l, ( 80*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3l, %%d4u, %%acc0\n"
+ "mac.w %%d3l, %%d4l, (-144*4,%[x1]), %%d4, %%acc1\n"
+ "movem.l (32,%[wp]), %%d0-%%d3\n" /* load 8 values */
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, ( 112*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d0u, %%d4u, %%acc0\n"
+ "mac.w %%d0u, %%d4l, (-176*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1u, %%d4u, %%acc0\n"
+ "mac.w %%d1u, %%d4l, ( 144*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d1l, %%d4u, %%acc0\n"
+ "mac.w %%d1l, %%d4l, (-208*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, ( 176*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d2u, %%d4u, %%acc0\n"
+ "mac.w %%d2u, %%d4l, (-240*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3u, %%d4u, %%acc0\n"
+ "mac.w %%d3u, %%d4l, ( 208*4,%[x1]), %%d4, %%acc1\n"
+ "mac.w %%d3l, %%d4u, %%acc0\n"
+ "mac.w %%d3l, %%d4l, %%acc1\n"
+ "movclr.l %%acc0, %%d0\n"
+ "move.l %%d0, %[t0]\n"
+ "movclr.l %%acc1, %%d0\n"
+ "move.l %%d0, %[t1]\n"
+
+ : [x1] "+a" (x1), [s0] "+m" (s0), [t0] "+m" (t0),
+ [s1] "+m" (s1), [t1] "+m" (t1)
+ : [wp] "a" (wp) : "d0", "d1", "d2", "d3", "d4");
+
+ u = shft4(s0 - t0);
+ v = shft4(s0 + t0);
+ t0 = sb0[14];
+ s0 = sb0[15] - t0;
+
+ sb0[31] = v + t0; /* A0 */
+ sb0[30] = u + s0; /* A1 */
+ sb0[15] = u - s0; /* A2 */
+ sb0[14] = v - t0; /* A3 */
+
+ u = shft4(s1 - t1);
+ v = shft4(s1 + t1);
+ t1 = sb1[14];
+ s1 = sb1[15] - t1;
+
+ sb1[31] = v + t1; /* A0 */
+ sb1[30] = u + s1; /* A1 */
+ sb1[15] = u - s1; /* A2 */
+ sb1[14] = v - t1; /* A3 */
+ }
+#else
+ int ch, s, t, *a;
+
+ for(ch=0; ch<cfg.channels; ch++)
+ {
+ a = ch ? sb1 : sb0;
+ for(k=0; k<18; k++, wk+=64, a+=SBLIMIT)
+ {
+ wp = enwindow;
+ x1 = wk;
+ x2 = x1 - 124;
+
+ /* x1[-572] .... x1[448] = 1022 */
+ /* 18*4*16*32 */
+ for(i=-15; i<0; i++)
+ {
+ s = (int)x2[-224*2] * wp[ 0]; t = (int)x1[ 224*2] * wp[ 0];
+ s += (int)x2[-160*2] * wp[ 1]; t += (int)x1[ 160*2] * wp[ 1];
+ s += (int)x2[- 96*2] * wp[ 2]; t += (int)x1[ 96*2] * wp[ 2];
+ s += (int)x2[- 32*2] * wp[ 3]; t += (int)x1[ 32*2] * wp[ 3];
+ s += (int)x2[ 32*2] * wp[ 4]; t += (int)x1[- 32*2] * wp[ 4];
+ s += (int)x2[ 96*2] * wp[ 5]; t += (int)x1[- 96*2] * wp[ 5];
+ s += (int)x2[ 160*2] * wp[ 6]; t += (int)x1[-160*2] * wp[ 6];
+ s += (int)x2[ 224*2] * wp[ 7]; t += (int)x1[-224*2] * wp[ 7];
+ s += (int)x1[-256*2] * wp[ 8]; t += (int)x2[ 256*2] * wp[16];
+ s += (int)x1[-192*2] * wp[ 9]; t += (int)x2[ 192*2] * wp[17];
+ s += (int)x1[-128*2] * wp[10]; t += (int)x2[ 128*2] * wp[18];
+ s += (int)x1[- 64*2] * wp[11]; t += (int)x2[ 64*2] * wp[19];
+ s += (int)x1[ 0*2] * wp[12]; t += (int)x2[ 0*2] * wp[20];
+ s += (int)x1[ 64*2] * wp[13]; t += (int)x2[- 64*2] * wp[21];
+ s += (int)x1[ 128*2] * wp[14]; t += (int)x2[-128*2] * wp[22];
+ s += (int)x1[ 192*2] * wp[15]; t += (int)x2[-192*2] * wp[23];
+
+ a[30+i*2] = shft4(t) + shft13(s) * wp[24];
+ a[31+i*2] = shft13(t) * wp[25] - shft13(s) * wp[26];
+ wp += 27;
+ x1 -= 2;
+ x2 += 2;
+ }
+
+ t = (int)x1[- 16*2] * wp[ 8]; s = (int)x1[ -32*2] * wp[0];
+ t += ((int)x1[- 48*2]-x1[ 16*2]) * wp[10]; s += (int)x1[ -96*2] * wp[1];
+ t += ((int)x1[- 80*2]+x1[ 48*2]) * wp[12]; s += (int)x1[-160*2] * wp[2];
+ t += ((int)x1[-112*2]-x1[ 80*2]) * wp[14]; s += (int)x1[-224*2] * wp[3];
+ t += ((int)x1[-144*2]+x1[112*2]) * wp[16]; s += (int)x1[ 32*2] * wp[4];
+ t += ((int)x1[-176*2]-x1[144*2]) * wp[18]; s += (int)x1[ 96*2] * wp[5];
+ t += ((int)x1[-208*2]+x1[176*2]) * wp[20]; s += (int)x1[ 160*2] * wp[6];
+ t += ((int)x1[-240*2]-x1[208*2]) * wp[22]; s += (int)x1[ 224*2] * wp[7];
+
+ u = shft4(s - t);
+ v = shft4(s + t);
+ t = a[14];
+ s = a[15] - t;
+
+ a[31] = v + t; /* A0 */
+ a[30] = u + s; /* A1 */
+ a[15] = u - s; /* A2 */
+ a[14] = v - t; /* A3 */
+ }
+ wk -= 18 * 64 - 1; /* rewind wk (to next channel start) */
+ }
+#endif
+}
+
+static void window_subband2(short *x1, int a[SBLIMIT])
+{
+ int xr;
+ short *wp = enwindow;
+ short *x2 = x1 - 124;
+
+ wp += 27 * 15;
+ x1 -= 2 * 15;
+ x2 += 2 * 15;
+
+ xr = a[28] - a[0]; a[0] += a[28]; a[28] = shft9(xr) * wp[-2*27+25];
+ xr = a[29] - a[1]; a[1] += a[29]; a[29] = shft9(xr) * wp[-2*27+25];
+ xr = a[26] - a[2]; a[2] += a[26]; a[26] = shft9(xr) * wp[-4*27+25];
+ xr = a[27] - a[3]; a[3] += a[27]; a[27] = shft9(xr) * wp[-4*27+25];
+ xr = a[24] - a[4]; a[4] += a[24]; a[24] = shft9(xr) * wp[-6*27+25];
+ xr = a[25] - a[5]; a[5] += a[25]; a[25] = shft9(xr) * wp[-6*27+25];
+ xr = a[22] - a[6]; a[6] += a[22]; a[22] = shft9(xr) * SQRT ;
+ xr = a[23] - a[7]; a[7] += a[23]; a[23] = shft9(xr) * SQRT - a[7];
+ a[ 7] -= a[ 6];
+ a[22] -= a[ 7];
+ a[23] -= a[22];
+
+ xr = a[ 6]; a[ 6] = a[31] - xr; a[31] = a[31] + xr;
+ xr = a[ 7]; a[ 7] = a[30] - xr; a[30] = a[30] + xr;
+ xr = a[22]; a[22] = a[15] - xr; a[15] = a[15] + xr;
+ xr = a[23]; a[23] = a[14] - xr; a[14] = a[14] + xr;
+
+ xr = a[20] - a[ 8]; a[ 8] += a[20]; a[20] = shft9(xr) * wp[-10*27+25];
+ xr = a[21] - a[ 9]; a[ 9] += a[21]; a[21] = shft9(xr) * wp[-10*27+25];
+ xr = a[18] - a[10]; a[10] += a[18]; a[18] = shft9(xr) * wp[-12*27+25];
+ xr = a[19] - a[11]; a[11] += a[19]; a[19] = shft9(xr) * wp[-12*27+25];
+ xr = a[16] - a[12]; a[12] += a[16]; a[16] = shft9(xr) * wp[-14*27+25];
+ xr = a[17] - a[13]; a[13] += a[17]; a[17] = shft9(xr) * wp[-14*27+25];
+ xr =-a[20] + a[24]; a[20] += a[24]; a[24] = shft9(xr) * wp[-12*27+25];
+ xr =-a[21] + a[25]; a[21] += a[25]; a[25] = shft9(xr) * wp[-12*27+25];
+ xr = a[ 4] - a[ 8]; a[ 4] += a[ 8]; a[ 8] = shft9(xr) * wp[-12*27+25];
+ xr = a[ 5] - a[ 9]; a[ 5] += a[ 9]; a[ 9] = shft9(xr) * wp[-12*27+25];
+ xr = a[ 0] - a[12]; a[ 0] += a[12]; a[12] = shft9(xr) * wp[ -4*27+25];
+ xr = a[ 1] - a[13]; a[ 1] += a[13]; a[13] = shft9(xr) * wp[ -4*27+25];
+ xr = a[16] - a[28]; a[16] += a[28]; a[28] = shft9(xr) * wp[ -4*27+25];
+ xr =-a[17] + a[29]; a[17] += a[29]; a[29] = shft9(xr) * wp[ -4*27+25];
+
+ xr = SQRT * shft9(a[ 2] - a[10]); a[ 2] += a[10]; a[10] = xr;
+ xr = SQRT * shft9(a[ 3] - a[11]); a[ 3] += a[11]; a[11] = xr;
+ xr = SQRT * shft9(a[26] - a[18]); a[18] += a[26]; a[26] = xr - a[18];
+ xr = SQRT * shft9(a[27] - a[19]); a[19] += a[27]; a[27] = xr - a[19];
+
+ xr = a[ 2]; a[19] -= a[ 3]; a[ 3] -= xr; a[ 2] = a[31] - xr; a[31] += xr;
+ xr = a[ 3]; a[11] -= a[19]; a[18] -= xr; a[ 3] = a[30] - xr; a[30] += xr;
+ xr = a[18]; a[27] -= a[11]; a[19] -= xr; a[18] = a[15] - xr; a[15] += xr;
+
+ xr = a[19]; a[10] -= xr; a[19] = a[14] - xr; a[14] += xr;
+ xr = a[10]; a[11] -= xr; a[10] = a[23] - xr; a[23] += xr;
+ xr = a[11]; a[26] -= xr; a[11] = a[22] - xr; a[22] += xr;
+ xr = a[26]; a[27] -= xr; a[26] = a[ 7] - xr; a[ 7] += xr;
+
+ xr = a[27]; a[27] = a[6] - xr; a[6] += xr;
+
+ xr = SQRT * shft9(a[ 0] - a[ 4]); a[ 0] += a[ 4]; a[ 4] = xr;
+ xr = SQRT * shft9(a[ 1] - a[ 5]); a[ 1] += a[ 5]; a[ 5] = xr;
+ xr = SQRT * shft9(a[16] - a[20]); a[16] += a[20]; a[20] = xr;
+ xr = SQRT * shft9(a[17] - a[21]); a[17] += a[21]; a[21] = xr;
+ xr =-SQRT * shft9(a[ 8] - a[12]); a[ 8] += a[12]; a[12] = xr - a[ 8];
+ xr =-SQRT * shft9(a[ 9] - a[13]); a[ 9] += a[13]; a[13] = xr - a[ 9];
+ xr =-SQRT * shft9(a[25] - a[29]); a[25] += a[29]; a[29] = xr - a[25];
+ xr =-SQRT * shft9(a[24] + a[28]); a[24] -= a[28]; a[28] = xr - a[24];
+
+ xr = a[24] - a[16]; a[24] = xr;
+ xr = a[20] - xr; a[20] = xr;
+ xr = a[28] - xr; a[28] = xr;
+
+ xr = a[25] - a[17]; a[25] = xr;
+ xr = a[21] - xr; a[21] = xr;
+ xr = a[29] - xr; a[29] = xr;
+
+ xr = a[17] - a[1]; a[17] = xr;
+ xr = a[ 9] - xr; a[ 9] = xr;
+ xr = a[25] - xr; a[25] = xr;
+ xr = a[ 5] - xr; a[ 5] = xr;
+ xr = a[21] - xr; a[21] = xr;
+ xr = a[13] - xr; a[13] = xr;
+ xr = a[29] - xr; a[29] = xr;
+
+ xr = a[ 1] - a[0]; a[ 1] = xr;
+ xr = a[16] - xr; a[16] = xr;
+ xr = a[17] - xr; a[17] = xr;
+ xr = a[ 8] - xr; a[ 8] = xr;
+ xr = a[ 9] - xr; a[ 9] = xr;
+ xr = a[24] - xr; a[24] = xr;
+ xr = a[25] - xr; a[25] = xr;
+ xr = a[ 4] - xr; a[ 4] = xr;
+ xr = a[ 5] - xr; a[ 5] = xr;
+ xr = a[20] - xr; a[20] = xr;
+ xr = a[21] - xr; a[21] = xr;
+ xr = a[12] - xr; a[12] = xr;
+ xr = a[13] - xr; a[13] = xr;
+ xr = a[28] - xr; a[28] = xr;
+ xr = a[29] - xr; a[29] = xr;
+
+ xr = a[ 0]; a[ 0] += a[31]; a[31] -= xr;
+ xr = a[ 1]; a[ 1] += a[30]; a[30] -= xr;
+ xr = a[16]; a[16] += a[15]; a[15] -= xr;
+ xr = a[17]; a[17] += a[14]; a[14] -= xr;
+ xr = a[ 8]; a[ 8] += a[23]; a[23] -= xr;
+ xr = a[ 9]; a[ 9] += a[22]; a[22] -= xr;
+ xr = a[24]; a[24] += a[ 7]; a[ 7] -= xr;
+ xr = a[25]; a[25] += a[ 6]; a[ 6] -= xr;
+ xr = a[ 4]; a[ 4] += a[27]; a[27] -= xr;
+ xr = a[ 5]; a[ 5] += a[26]; a[26] -= xr;
+ xr = a[20]; a[20] += a[11]; a[11] -= xr;
+ xr = a[21]; a[21] += a[10]; a[10] -= xr;
+ xr = a[12]; a[12] += a[19]; a[19] -= xr;
+ xr = a[13]; a[13] += a[18]; a[18] -= xr;
+ xr = a[28]; a[28] += a[ 3]; a[ 3] -= xr;
+ xr = a[29]; a[29] += a[ 2]; a[ 2] -= xr;
+}
+
+static void mdct_long(int *out, int *in)
+{
+ int ct,st;
+ int tc1, tc2, tc3, tc4, ts5, ts6, ts7, ts8;
+ int ts1, ts2, ts3, ts4, tc5, tc6, tc7, tc8;
+
+ /* 1,2, 5,6, 9,10, 13,14, 17 */
+ tc1 = in[17] - in[ 9];
+ tc3 = in[15] - in[11];
+ tc4 = in[14] - in[12];
+ ts5 = in[ 0] + in[ 8];
+ ts6 = in[ 1] + in[ 7];
+ ts7 = in[ 2] + in[ 6];
+ ts8 = in[ 3] + in[ 5];
+
+ out[17] = (ts5 + ts7 - ts8) * cx[8] - (ts6 - in[4]) * cx[8];
+ st = (ts5 + ts7 - ts8) * cx[7] + (ts6 - in[4]) * cx[8];
+ ct = (tc1 - tc3 - tc4) * cx[6];
+ out[5] = ct + st;
+ out[6] = ct - st;
+
+ tc2 = (in[16] - in[10]) * cx[6];
+ ts6 = ts6 * cx[7] + in[4] * cx[8];
+
+ ct = tc1 * cx[0] + tc2 + tc3 * cx[1] + tc4 * cx[2];
+ st = -ts5 * cx[4] + ts6 - ts7 * cx[5] + ts8 * cx[3];
+ out[1] = ct + st;
+ out[2] = ct - st;
+
+ ct = tc1 * cx[1] - tc2 - tc3 * cx[2] + tc4 * cx[0];
+ st = -ts5 * cx[5] + ts6 - ts7 * cx[3] + ts8 * cx[4];
+ out[ 9] = ct + st;
+ out[10] = ct - st;
+
+ ct = tc1 * cx[2] - tc2 + tc3 * cx[0] - tc4 * cx[1];
+ st = ts5 * cx[3] - ts6 + ts7 * cx[4] - ts8 * cx[5];
+ out[13] = ct + st;
+ out[14] = ct - st;
+
+ ts1 = in[ 8] - in[ 0];
+ ts3 = in[ 6] - in[ 2];
+ ts4 = in[ 5] - in[ 3];
+ tc5 = in[17] + in[ 9];
+ tc6 = in[16] + in[10];
+ tc7 = in[15] + in[11];
+ tc8 = in[14] + in[12];
+
+ out[0] = (tc5 + tc7 + tc8) * cx[8] + (tc6 + in[13]) * cx[8];
+ ct = (tc5 + tc7 + tc8) * cx[7] - (tc6 + in[13]) * cx[8];
+ st = (ts1 - ts3 + ts4) * cx[6];
+ out[11] = ct + st;
+ out[12] = ct - st;
+
+ ts2 = (in[7] - in[1]) * cx[6];
+ tc6 = in[13] * cx[8] - tc6 * cx[7];
+
+ ct = tc5 * cx[3] - tc6 + tc7 * cx[4] + tc8 * cx[5];
+ st = ts1 * cx[2] + ts2 + ts3 * cx[0] + ts4 * cx[1];
+ out[3] = ct + st;
+ out[4] = ct - st;
+
+ ct =-tc5 * cx[5] + tc6 - tc7 * cx[3] - tc8 * cx[4];
+ st = ts1 * cx[1] + ts2 - ts3 * cx[2] - ts4 * cx[0];
+ out[7] = ct + st;
+ out[8] = ct - st;
+
+ ct =-tc5 * cx[4] + tc6 - tc7 * cx[5] - tc8 * cx[3];
+ st = ts1 * cx[0] - ts2 + ts3 * cx[1] - ts4 * cx[2];
+ out[15] = ct + st;
+ out[16] = ct - st;
+}
+
+static int find_bitrate_index(int type, int bitrate /*, bool stereo */)
+{
+ int i;
+
+ for(i=0;i<14;i++)
+ if(bitrate == bitr_index[type][i])
+ break;
+ return i;
+}
+
+static int find_samplerate_index(unsigned long freq, int *mp3_type)
+{
+ int mpeg = freq >= (32000+24000)/2 ? 1 : 0;
+
+ unsigned long dmin = ULONG_MAX;
+ int idmin = -1, i;
+
+ for (i = 0; i < 3; i++)
+ {
+ unsigned long diff;
+
+ if (sampr_index[mpeg][i] == freq)
+ {
+ idmin = i;
+ break;
+ }
+
+ if ((long)sampr_index[mpeg][i] < (long)freq)
+ diff = freq - sampr_index[mpeg][i];
+ else
+ diff = sampr_index[mpeg][i] - freq;
+
+ if (diff < dmin)
+ {
+ dmin = diff;
+ idmin = i;
+ }
+ }
+
+ *mp3_type = mpeg;
+ return idmin;
+}
+
+static bool init_mp3_encoder_engine(int sample_rate, int num_channels, int bitrate)
+{
+ const bool stereo = num_channels > 1;
+ uint32_t avg_byte_per_frame;
+
+ cfg.channels = stereo ? 2 : 1;
+ cfg.mpg.mode = stereo ? 0 : 3; /* 0=stereo, 3=mono */
+ cfg.mpg.smpl_id = find_samplerate_index(sample_rate, &cfg.mpg.type);
+ cfg.samplerate = sampr_index[cfg.mpg.type][cfg.mpg.smpl_id];
+ cfg.mpg.bitr_id = find_bitrate_index(cfg.mpg.type, bitrate /*, stereo */);
+ cfg.mpg.bitrate = bitr_index[cfg.mpg.type][cfg.mpg.bitr_id];
+ cfg.mpg.num_bands = num_bands[stereo ? cfg.mpg.type : 2][cfg.mpg.bitr_id];
+
+ if (cfg.mpg.type == 1)
+ {
+ cfg.granules = 2;
+ pcm_chunk_size = PCM_CHUNK_SIZE1;
+ samp_per_frame = SAMP_PER_FRAME1;
+ }
+ else
+ {
+ cfg.granules = 1;
+ pcm_chunk_size = PCM_CHUNK_SIZE2;
+ samp_per_frame = SAMP_PER_FRAME2;
+ }
+
+ memcpy(scalefac, sfBand[cfg.mpg.smpl_id + 3*cfg.mpg.type], sizeof(scalefac));
+ memset(mfbuf , 0 , sizeof(mfbuf ));
+ memset(mdct_freq , 0 , sizeof(mdct_freq ));
+ memset(enc_data , 0 , sizeof(enc_data ));
+ memset(sb_data , 0 , sizeof(sb_data ));
+ memset(&CodedData, 0 , sizeof(CodedData ));
+ memcpy(ca , ca_const , sizeof(ca ));
+ memcpy(cs , cs_const , sizeof(cs ));
+ memcpy(cx , cx_const , sizeof(cx ));
+ memcpy(win , win_const , sizeof(win ));
+ memcpy(enwindow , enwindow_const , sizeof(enwindow ));
+ memcpy(int2idx , int2idx_const , sizeof(int2idx ));
+ memcpy(ht_count , ht_count_const , sizeof(ht_count ));
+ memcpy( tab01 , tab01_const , sizeof(tab01 ));
+ memcpy( tab23 , tab23_const , sizeof(tab23 ));
+ memcpy( tab56 , tab56_const , sizeof(tab56 ));
+ memcpy( tab1315 , tab1315_const , sizeof(tab1315 ));
+ memcpy( tab1624 , tab1624_const , sizeof(tab1624 ));
+ memcpy( tab789 , tab789_const , sizeof(tab789 ));
+ memcpy( tabABC , tabABC_const , sizeof(tabABC ));
+ memcpy( t1HB , t1HB_const , sizeof(t1HB ));
+ memcpy( t2HB , t2HB_const , sizeof(t2HB ));
+ memcpy( t3HB , t3HB_const , sizeof(t3HB ));
+ memcpy( t5HB , t5HB_const , sizeof(t5HB ));
+ memcpy( t6HB , t6HB_const , sizeof(t6HB ));
+ memcpy( t7HB , t7HB_const , sizeof(t7HB ));
+ memcpy( t8HB , t8HB_const , sizeof(t8HB ));
+ memcpy( t9HB , t9HB_const , sizeof(t9HB ));
+ memcpy(t10HB , t10HB_const , sizeof(t10HB ));
+ memcpy(t11HB , t11HB_const , sizeof(t11HB ));
+ memcpy(t12HB , t12HB_const , sizeof(t12HB ));
+ memcpy(t13HB , t13HB_const , sizeof(t13HB ));
+ memcpy(t15HB , t15HB_const , sizeof(t15HB ));
+ memcpy(t16HB , t16HB_const , sizeof(t16HB ));
+ memcpy(t24HB , t24HB_const , sizeof(t24HB ));
+ memcpy( t1l , t1l_const , sizeof(t1l ));
+ memcpy( t2l , t2l_const , sizeof(t2l ));
+ memcpy( t3l , t3l_const , sizeof(t3l ));
+ memcpy( t5l , t5l_const , sizeof(t5l ));
+ memcpy( t6l , t6l_const , sizeof(t6l ));
+ memcpy( t7l , t7l_const , sizeof(t7l ));
+ memcpy( t8l , t8l_const , sizeof(t8l ));
+ memcpy( t9l , t9l_const , sizeof(t9l ));
+ memcpy(t10l , t10l_const , sizeof(t10l ));
+ memcpy(t11l , t11l_const , sizeof(t11l ));
+ memcpy(t12l , t12l_const , sizeof(t12l ));
+ memcpy(t13l , t13l_const , sizeof(t13l ));
+ memcpy(t15l , t15l_const , sizeof(t15l ));
+ memcpy(t16l , t16l_const , sizeof(t16l ));
+ memcpy(t24l , t24l_const , sizeof(t24l ));
+ memcpy(ht , ht_const , sizeof(ht ));
+
+ ht[ 0].table = NULL; ht[ 0].hlen = NULL; /* Apparently not used */
+ ht[ 1].table = t1HB; ht[ 1].hlen = t1l;
+ ht[ 2].table = t2HB; ht[ 2].hlen = t2l;
+ ht[ 3].table = t3HB; ht[ 3].hlen = t3l;
+ ht[ 4].table = NULL; ht[ 4].hlen = NULL; /* Apparently not used */
+ ht[ 5].table = t5HB; ht[ 5].hlen = t5l;
+ ht[ 6].table = t6HB; ht[ 6].hlen = t6l;
+ ht[ 7].table = t7HB; ht[ 7].hlen = t7l;
+ ht[ 8].table = t8HB; ht[ 8].hlen = t8l;
+ ht[ 9].table = t9HB; ht[ 9].hlen = t9l;
+ ht[10].table = t10HB; ht[10].hlen = t10l;
+ ht[11].table = t11HB; ht[11].hlen = t11l;
+ ht[12].table = t12HB; ht[12].hlen = t12l;
+ ht[13].table = t13HB; ht[13].hlen = t13l;
+ ht[14].table = NULL; ht[14].hlen = NULL; /* Apparently not used */
+ ht[15].table = t15HB; ht[15].hlen = t15l;
+
+ /* Figure average number of 'bytes' per frame */
+ avg_byte_per_frame = SAMPL2 * 16000 * cfg.mpg.bitrate / (2 - cfg.mpg.type);
+ avg_byte_per_frame = avg_byte_per_frame / cfg.samplerate;
+ cfg.byte_per_frame = avg_byte_per_frame / 64;
+ cfg.frac_per_frame = avg_byte_per_frame & 63;
+ cfg.slot_lag = 0;
+ cfg.sideinfo_len = 32 + (cfg.mpg.type ? (cfg.channels == 1 ? 136 : 256)
+ : (cfg.channels == 1 ? 72 : 136));
+
+ return true;
+}
+
+static inline void to_mono(uint32_t **samp)
+{
+ int32_t lr = **samp;
+ int32_t m = (int16_t)lr + (lr >> 16) + err;
+ err = m & 1;
+ m >>= 1;
+ *(*samp)++ = (m << 16) | (uint16_t)m;
+} /* to_mono */
+
+static void to_mono_mm(void)
+{
+ /* |llllllllllllllll|rrrrrrrrrrrrrrrr| =>
+ * |mmmmmmmmmmmmmmmm|mmmmmmmmmmmmmmmm|
+ */
+ uint32_t *samp = (uint32_t *)&mfbuf[2*512];
+ uint32_t *samp_end = samp + samp_per_frame;
+
+ do
+ {
+ to_mono(&samp);
+ to_mono(&samp);
+ to_mono(&samp);
+ to_mono(&samp);
+ to_mono(&samp);
+ to_mono(&samp);
+ to_mono(&samp);
+ to_mono(&samp);
+ }
+ while (samp < samp_end);
+} /* to_mono_mm */
+
+#ifdef ROCKBOX_LITTLE_ENDIAN
+
+/* Swaps a frame to big endian */
+static inline void byte_swap_frame32(uint32_t *dst, uint32_t *src,
+ size_t size)
+{
+ assert(dst); assert(src);
+ uint32_t *src_end = SKIPBYTES(src, size);
+
+ do
+ {
+#define swap32 bswap_32
+ *dst++ = swap32(*src); src++;
+ *dst++ = swap32(*src); src++;
+ *dst++ = swap32(*src); src++;
+ *dst++ = swap32(*src); src++;
+ *dst++ = swap32(*src); src++;
+ *dst++ = swap32(*src); src++;
+ *dst++ = swap32(*src); src++;
+ *dst++ = swap32(*src); src++;
+ }
+ while(src < src_end);
+} /* byte_swap_frame32 */
+#endif /* ROCKBOX_LITTLE_ENDIAN */
+
+static void set_scale_facs(int *mdct_freq)
+{
+ unsigned int i, is, ie, k, s;
+ int max_freq_val, avrg_freq_val;
+
+ /* calc average of first 256 frequency values */
+ for(avrg_freq_val=i=0; i<256; i++)
+ avrg_freq_val += mdct_freq[i];
+ avrg_freq_val >>= 8;
+
+ /* if max of current band is smaller than average, increase precision */
+ /* last band keeps untouched (not scaled) */
+ for(is=k=0; is<scalefac[21]; k++)
+ {
+ max_freq_val = 0;
+
+ for(i=is, ie=scalefac[k+1]; i<ie; i++)
+ if(max_freq_val < mdct_freq[i])
+ max_freq_val = mdct_freq[i];
+
+ for(s=0; s<3; s++)
+ if((max_freq_val<<s) > avrg_freq_val)
+ break;
+
+ band_scale_f[k] = (unsigned char)s;
+
+ for(i=is; s && i<ie; i++)
+ mdct_freq[i] <<= s;
+
+ is = ie;
+ }
+}
+
+static void encode_frame(char *buffer, struct enc_chunk_hdr *chunk)
+{
+ int gr, gr_cnt;
+ uint32_t max;
+ /* encode one mp3 frame in this loop */
+ CodedData.bitpos = 0;
+ memset(CodedData.bbuf, 0, sizeof(CodedData.bbuf));
+
+ if((cfg.slot_lag += cfg.frac_per_frame) >= 64)
+ { /* Padding for this frame */
+ cfg.slot_lag -= 64;
+ cfg.mpg.padding = 1;
+ }
+ else
+ cfg.mpg.padding = 0;
+
+ cfg.mean_bits = (8 * cfg.byte_per_frame + 8 * cfg.mpg.padding
+ - cfg.sideinfo_len) / cfg.granules / cfg.channels
+ - 42; // reserved for scale_facs
+
+ /* shift out old samples */
+ memcpy(mfbuf, mfbuf + 2*cfg.granules*576, 4*512);
+
+ if (chunk->flags & CHUNKF_START_FILE)
+ {
+ /* prefix silent samples for encoder delay */
+ memset(mfbuf + 2*512, 0, ENC_DELAY_SIZE);
+ /* read new samples to iram for further processing */
+ memcpy(mfbuf + 2*512 + ENC_DELAY_SIZE/2,
+ buffer, pcm_chunk_size - ENC_DELAY_SIZE);
+ chunk->num_pcm = samp_per_frame - ENC_DELAY_SAMP;
+ }
+ else
+ {
+ /* read new samples to iram for further processing */
+ memcpy(mfbuf + 2*512, buffer, pcm_chunk_size);
+ chunk->num_pcm = samp_per_frame;
+ }
+
+ if (cfg.channels == 1)
+ to_mono_mm();
+
+ cfg.ResvSize = 0;
+ gr_cnt = cfg.granules * cfg.channels;
+ CodedData.bitpos = cfg.sideinfo_len; /* leave space for mp3 header */
+
+ for(gr=0; gr<cfg.granules; gr++)
+ {
+ short *wk = mfbuf + 2*286 + gr*1152;
+ int ch;
+
+ /* 16bit packed wav data can be windowed efficiently on coldfire */
+ window_subband1(wk, sb_data[0][1-gr][0], sb_data[1][1-gr][0]);
+
+ for(ch=0; ch<cfg.channels; ch++)
+ {
+ int ii, k, shift;
+
+ wk = mfbuf + 2*286 + gr*1152 + ch;
+
+ /* 36864=4*18*16*32 */
+ for(k=0; k<18; k++, wk+=64)
+ {
+ window_subband2(wk, sb_data[ch][1-gr][k]);
+ /* Compensate for inversion in the analysis filter */
+ if(k & 1)
+ {
+ int band;
+ for(band=1; band<32; band+=2)
+ sb_data[ch][1-gr][k][band] *= -1;
+ }
+ }
+
+ /* Perform imdct of 18 previous + 18 current subband samples */
+ /* for integer precision do this loop again (if neccessary) */
+ shift = 14 - (cfg.cod_info[gr][ch].additStep >> 2);
+ for(k=1,ii=0; ii<3 && k; ii++)
+ {
+ int *mdct = mdct_freq;
+ int band;
+
+ cfg.cod_info[gr][ch].additStep = 4 * (14 - shift);
+
+ for(band=0; band<cfg.mpg.num_bands; band++, mdct+=18)
+ {
+ int *band0 = sb_data[ch][ gr][0] + order[band];
+ int *band1 = sb_data[ch][1-gr][0] + order[band];
+ int work[18];
+
+ /* 9216=4*32*9*8 */
+ for(k=-9; k<0; k++)
+ {
+ int a = shft_n(band1[(k+9)*32], shift);
+ int b = shft_n(band1[(8-k)*32], shift);
+ int c = shft_n(band0[(k+9)*32], shift);
+ int d = shft_n(band0[(8-k)*32], shift);
+
+ work[k+ 9] = shft16(a * win[k+ 9][0] +
+ b * win[k+ 9][1] +
+ c * win[k+ 9][2] +
+ d * win[k+ 9][3]);
+
+ work[k+18] = shft16(c * win[k+18][0] +
+ d * win[k+18][1] +
+ a * win[k+18][2] +
+ b * win[k+18][3]);
+ }
+
+ /* 7200=4*18*100 */
+ mdct_long(mdct, work);
+
+ /* Perform aliasing reduction butterfly */
+ if(band != 0)
+ {
+ for(k=7; k>=0; --k)
+ {
+ int bu, bd;
+ bu = shft15(mdct[k]) * ca[k] +
+ shft15(mdct[-1-k]) * cs[k];
+ bd = shft15(mdct[k]) * cs[k] -
+ shft15(mdct[-1-k]) * ca[k];
+ mdct[-1-k] = bu;
+ mdct[ k ] = bd;
+ }
+ }
+ }
+
+ max = 0;
+ for(k=0; k<576; k++)
+ {
+ if(mdct_freq[k] < 0)
+ {
+ mdct_sign[k] = 1; /* negative */
+ mdct_freq[k] = shft13(-mdct_freq[k]);
+ }
+ else
+ {
+ mdct_sign[k] = 0; /* positive */
+ mdct_freq[k] = shft13(mdct_freq[k]);
+ }
+
+ if(max < (uint32_t)mdct_freq[k])
+ max = (uint32_t)mdct_freq[k];
+ }
+ cfg.cod_info[gr][ch].max_val = max;
+
+ /* calc new shift for higher integer precision */
+ for(k=0; max<(uint32_t)(0x7800>>k); k++) shift--;
+ for( ; (max>>k)>=(uint32_t)0x10000; k++) shift++;
+ if(shift < 0) shift = 0;
+ }
+
+ cfg.cod_info[gr][ch].quantStep +=
+ cfg.cod_info[gr][ch].additStep;
+
+ set_scale_facs(mdct_freq);
+
+ /* bit and noise allocation */
+ iteration_loop(mdct_freq, &cfg.cod_info[gr][ch],
+ gr_cnt--);
+
+ /* write the frame to the bitstream */
+ Huffmancodebits(enc_data, mdct_sign,
+ &cfg.cod_info[gr][ch]);
+
+ cfg.cod_info[gr][ch].quantStep -=
+ cfg.cod_info[gr][ch].additStep;
+
+ if(cfg.granules == 1)
+ {
+ memcpy(sb_data[ch][0], sb_data[ch][1],
+ sizeof(sb_data[ch][0]));
+ }
+ }
+ }
+ chunk->enc_size = cfg.byte_per_frame + cfg.mpg.padding;
+
+ /* finish this chunk by adding sideinfo header data */
+ CodedData.bitpos = 0;
+ encodeSideInfo( cfg.cod_info );
+
+#ifdef ROCKBOX_BIG_ENDIAN
+ /* copy chunk to enc_buffer */
+ memcpy(chunk->enc_data, CodedData.bbuf, chunk->enc_size);
+#else
+ /* swap frame to big endian */
+ byte_swap_frame32((uint32_t *)chunk->enc_data, CodedData.bbuf, chunk->enc_size);
+#endif
+} /* encode_frame */
projects / vlc / commitdiff