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rockbox/apps/codecs/mp3_enc.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Antonius Hellmann
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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.
#ifndef SIMULATOR
#include <inttypes.h>
#include "codeclib.h"
CODEC_ENC_HEADER
#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 memcpy ci->memcpy
#define memset ci->memset
#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;
long 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; /* 9216 Bytes */
static short enc_data [SAMPL2] IBSS_ATTR; /* 4608 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 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,
99, 99,100,100,100,100,100,100,101,101,101,101,101,101,102,102,102,102,102,102,
103,103,103,103,103,103,104,104,104,104,104,104,104,105,105,105,105,105,105,106,
106,106,106,106,106,107,107,107,107,107,107,107,108,108,108,108,108,108,109,109,
109,109,109,109,110,110,110,110,110,110,110,111,111,111,111,111,111,112,112,112,
112,112,112,112,113,113,113,113,113,113,114,114,114,114,114,114,115,115,115,115,
115,115,115,116,116,116,116,116,116,117,117,117,117,117,117,117,118,118,118,118,
118,118,118,119,119,119,119,119,119,120,120,120,120,120,120,120,121,121,121,121,
121,121,122,122,122,122,122,122,122,123,123,123,123,123,123,123,124,124,124,124,
124,124,125,125,125,125,125,125,125,126,126,126,126,126,126,126,127,127,127,127,
127,127,128,128,128,128,128,128,128,129,129,129,129,129,129,129,130,130,130,130,
130,130,131,131,131,131,131,131,131,132,132,132,132,132,132,132,133,133,133,133,
133,133,133,134,134,134,134,134,134,134,135,135,135,135,135,135,136,136,136,136,
136,136,136,137,137,137,137,137,137,137,138,138,138,138,138,138,138,139,139,139,
139,139,139,139,140,140,140,140,140,140,140,141,141,141,141,141,141,141,142,142,
142,142,142,142,142,143,143,143,143,143,143,143,144,144,144,144,144,144,144,145,
145,145,145,145,145,145,146,146,146,146,146,146,146,147,147,147,147,147,147,147,
148,148,148,148,148,148,148,149,149,149,149,149,149,149,150,150,150,150,150,150,
150,151,151,151,151,151,151,151,152,152,152,152,152,152,152,153,153,153,153,153,
153,153,154,154,154,154,154,154,154,154,155,155,155,155,155,155,155,156,156,156,
156,156,156,156,157,157,157,157,157,157,157,158,158,158,158,158,158,158,159,159,
159,159,159,159,159,160,160,160,160,160,160,160,160,161,161,161,161,161,161,161,
162,162,162,162,162,162,162,163,163,163,163,163,163,163,163,164,164,164,164,164,
164,164,165,165,165,165,165,165,165,166,166,166,166,166,166,166,167,167,167,167,
167,167,167,167,168,168,168,168,168,168,168,169,169,169,169,169,169,169,169,170,
170,170,170,170,170,170,171,171,171,171,171,171,171,172,172,172,172,172,172,172,
172,173,173,173,173,173,173,173,174,174,174,174,174,174,174,174,175,175,175,175,
175,175,175,176,176,176,176,176,176,176,176,177,177,177,177,177,177,177,178,178,
178,178,178,178,178,178,179,179,179,179,179,179,179,180,180,180,180,180,180,180,
180,181,181,181,181,181,181,181,182,182,182,182,182,182,182,182,183,183,183,183,
183,183,183,184,184,184,184,184,184,184,184,185,185,185,185,185,185,185,186,186,
186,186,186,186,186,186,187,187,187,187,187,187,187,187,188,188,188,188,188,188,
188,189,189,189,189,189,189,189,189,190,190,190,190,190,190,190,190,191,191,191,
191,191,191,191,192,192,192,192,192,192,192,192,193,193,193,193,193,193,193,193,
194,194,194,194,194,194,194,195,195,195,195,195,195,195,195,196,196,196,196,196,
196,196,196,197,197,197,197,197,197,197,197,198,198,198,198,198,198,198,199,199,
199,199,199,199,199,199,200,200,200,200,200,200,200,200,201,201,201,201,201,201,
201,201,202,202,202,202,202,202,202,202,203,203,203,203,203,203,203,204,204,204,
204,204,204,204,204,205,205,205,205,205,205,205,205,206,206,206,206,206,206,206,
206,207,207,207,207,207,207,207,207,208,208,208,208,208,208,208,208,209,209,209,
209,209,209,209,209,210,210,210,210,210,210,210,210,211,211,211,211,211,211,211,
211,212,212,212,212,212,212,212,212,213,213,213,213,213,213,213,213,214,214,214,
214,214,214,214,214,215,215,215,215,215,215,215,215,216,216,216,216,216,216,216,
216,217,217,217,217,217,217,217,217,218,218,218,218,218,218,218,218,219,219,219,
219,219,219,219,219,220,220,220,220,220,220,220,220,221,221,221,221,221,221,221,
221,222,222,222,222,222,222,222,222,223,223,223,223,223,223,223,223,224,224,224,
224,224,224,224,224,225,225,225,225,225,225,225,225,226,226,226,226,226,226,226,
226,227,227,227,227,227,227,227,227,228,228,228,228,228,228,228,228,229,229,229,
229,229,229,229,229,229,230,230,230,230,230,230,230,230,231,231,231,231,231,231,
231,231,232,232,232,232,232,232,232,232,233,233,233,233,233,233,233,233,234,234,
234,234,234,234,234,234,234,235,235,235,235,235,235,235,235,236,236,236,236,236,
236,236,236,237,237,237,237,237,237,237,237,238,238,238,238,238,238,238,238,238,
239,239,239,239,239,239,239,239,240,240,240,240,240,240,240,240,241,241,241,241,
241,241,241,241,242,242,242,242,242,242,242,242,242,243,243,243,243,243,243,243,
243,244,244,244,244,244,244,244,244,245,245,245,245,245,245,245,245,245,246,246,
246,246,246,246,246,246,247,247,247,247,247,247,247,247,248,248,248,248,248,248,
248,248,248,249,249,249,249,249,249,249,249,250,250,250,250,250,250,250,250,250,
251,251,251,251,251,251,251,251,252,252,252,252,252,252,252,252,253,253,253,253,
253,253,253,253,253,254,254,254,254,254,254,254,254,255,255,255,255,255,255,255,
255,255,256,256,256,256,256,256,256,256,257,257,257,257,257,257,257,257,257,258,
258,258,258,258,258,258,258,259,259,259,259,259,259,259,259,259,260,260,260,260,
260,260,260,260,261,261,261,261,261,261,261,261,261,262,262,262,262,262,262,262,
262,263,263,263,263,263,263,263,263,263,264,264,264,264,264,264,264,264,265,265,
265,265,265,265,265,265,265,266,266,266,266,266,266,266,266,267,267,267,267,267,
267,267,267,267,268,268,268,268,268,268,268,268,268,269,269,269,269,269,269,269,
269,270,270,270,270,270,270,270,270,270,271,271,271,271,271,271,271,271,271,272,
272,272,272,272,272,272,272,273,273,273,273,273,273,273,273,273,274,274,274,274,
274,274,274,274,275,275,275,275,275,275,275,275,275,276,276,276,276,276,276,276,
276,276,277,277,277,277,277,277,277,277,277,278,278,278,278,278,278,278,278,279,
279,279,279,279,279,279,279,279,280,280,280,280,280,280,280,280,280,281,281,281,
281,281,281,281,281,282,282,282,282,282,282,282,282,282,283,283,283,283,283,283,
283,283,283,284,284,284,284,284,284,284,284,284,285,285,285,285,285,285,285,285,
286,286,286,286,286,286,286,286,286,287,287,287,287,287,287,287,287,287,288,288,
288,288,288,288,288,288,288,289,289,289,289,289,289,289,289,289,290,290,290,290,
290,290,290,290,291,291,291,291,291,291,291,291,291,292,292,292,292,292,292,292,
292,292,293,293,293,293,293,293,293,293,293,294,294,294,294,294,294,294,294,294,
295,295,295,295,295,295,295,295,295,296,296,296,296,296,296,296,296,296,297,297,
297,297,297,297,297,297,297,298,298,298,298,298,298,298,298,299,299,299,299,299,
299,299,299,299,300,300,300,300,300,300,300,300,300,301,301,301,301,301,301,301,
301,301,302,302,302,302,302,302,302,302,302,303,303,303,303,303,303,303,303,303,
304,304,304,304,304,304,304,304,304,305,305,305,305,305,305,305,305,305,306,306,
306,306,306,306,306,306,306,307,307,307,307,307,307,307,307,307,308,308,308,308,
308,308,308,308,308,309,309,309,309,309,309,309,309,309,310,310,310,310,310,310,
310,310,310,311,311,311,311,311,311,311,311,311,312,312,312,312,312,312,312,312,
312,313,313,313,313,313,313,313,313,313,314,314,314,314,314,314,314,314,314,315,
315,315,315,315,315,315,315,315,316,316,316,316,316,316,316,316,316,317,317,317,
317,317,317,317,317,317,318,318,318,318,318,318,318,318,318,318,319,319,319,319,
319,319,319,319,319,320,320,320,320,320,320,320,320,320,321,321,321,321,321,321,
321,321,321,322,322,322,322,322,322,322,322,322,323,323,323,323,323,323,323,323,
323,324,324,324,324,324,324,324,324,324,325,325,325,325,325,325,325,325,325,325,
326,326,326,326,326,326,326,326,326,327,327,327,327,327,327,327,327,327,328,328,
328,328,328,328,328,328,328,329,329,329,329,329,329,329,329,329,330,330,330,330,
330,330,330,330,330,330,331,331,331,331,331,331,331,331,331,332,332,332,332,332,
332,332,332,332,333,333,333,333,333,333,333,333,333,334,334,334,334,334,334,334,
334,334,335,335,335,335,335,335,335,335,335,335,336,336,336,336,336,336,336,336,
336,337,337,337,337,337,337,337,337,337,338,338,338,338,338,338,338,338,338,338,
339,339,339,339,339,339,339,339,339,340,340,340,340,340,340,340,340,340,341,341,
341,341,341,341,341,341,341,341,342,342,342,342,342,342,342,342,342,343,343,343,
343,343,343,343,343,343,344,344,344,344,344,344,344,344,344,344,345,345,345,345,
345,345,345,345,345,346,346,346,346,346,346,346,346,346,347,347,347,347,347,347,
347,347,347,347,348,348,348,348,348,348,348,348,348,349,349,349,349,349,349,349,
349,349,350,350,350,350,350,350,350,350,350,350,351,351,351,351,351,351,351,351,
351,352,352,352,352,352,352,352,352,352,352,353,353,353,353,353,353,353,353,353,
354,354,354,354,354,354,354,354,354,355,355,355,355,355,355,355,355,355,355,356,
356,356,356,356,356,356,356,356,357,357,357,357,357,357,357,357,357,357,358,358,
358,358,358,358,358,358,358,359,359,359,359,359,359,359,359,359,359,360,360,360,
360,360,360,360,360,360,361,361,361,361,361,361,361,361,361,361,362,362,362,362,
362,362,362,362,362,363,363,363,363,363,363,363,363,363,363,364,364,364,364,364,
364,364,364,364,365,365,365,365,365,365,365,365,365,365,366,366,366,366,366,366,
366,366,366,367,367,367,367,367,367,367,367,367,367,368,368,368,368,368,368,368,
368,368,369,369,369,369,369,369,369,369,369,369,370,370,370,370,370,370,370,370,
370,370,371,371,371,371,371,371,371,371,371,372,372,372,372,372,372,372,372,372,
372,373,373,373,373,373,373,373,373,373,374,374,374,374,374,374,374,374,374,374,
375,375,375,375,375,375,375,375,375,375,376,376,376,376,376,376,376,376,376,377,
377,377,377,377,377,377,377,377,377,378,378,378,378,378,378,378,378,378,379,379,
379,379,379,379,379,379,379,379,380,380,380,380,380,380,380,380,380,380,381,381,
381,381,381,381,381,381,381,382,382,382,382,382,382,382,382,382,382,383,383,383,
383,383,383,383,383,383,383,384,384,384,384,384,384,384,384,384,385,385,385,385,
385,385,385,385,385,385,386,386,386,386,386,386,386,386,386,386,387,387,387,387,
387,387,387,387,387,387,388,388,388,388,388,388,388,388,388,389,389,389,389,389,
389,389,389,389,389,390,390,390,390,390,390,390,390,390,390,391,391,391,391,391,
391,391,391,391,391,392,392,392,392,392,392,392,392,392,393,393,393,393,393,393,
393,393,393,393,394,394,394,394,394,394,394,394,394,394,395,395,395,395,395,395,
395,395,395,395,396,396,396,396,396,396,396,396,396,397,397,397,397,397,397,397,
397,397,397,398,398,398,398,398,398,398,398,398,398,399,399,399,399,399,399,399,
399,399,399,400,400,400,400,400,400,400,400,400,400,401,401,401,401,401,401,401,
401,401,402,402,402,402,402,402,402,402,402,402,403,403,403,403,403,403,403,403,
403,403,404,404,404,404,404,404,404,404,404,404,405,405,405,405,405,405,405,405,
405,405,406,406,406,406,406,406,406,406,406,406,407,407,407,407,407,407,407,407,
407,407,408,408,408,408,408,408,408,408,408,408,409,409,409,409,409,409,409,409,
409,410,410,410,410,410,410,410,410,410,410,411,411,411,411,411,411,411,411,411,
411,412,412,412,412,412,412,412,412,412,412,413,413,413,413,413,413,413,413,413,
413,414,414,414,414,414,414,414,414,414,414,415,415,415,415,415,415,415,415,415,
415,416,416,416,416,416,416,416,416,416,416,417,417,417,417,417,417,417,417,417,
417,418,418,418,418,418,418,418,418,418,418,419,419,419,419,419,419,419,419,419,
419,420,420,420,420,420,420,420,420,420,420,421,421,421,421,421,421,421,421,421,
421,422,422,422,422,422,422,422,422,422,422,423,423,423,423,423,423,423,423,423,
423,424,424,424,424,424,424,424,424,424,424,425,425,425,425,425,425,425,425,425,
425,426,426,426,426,426,426,426,426,426,426,427,427,427,427,427,427,427,427,427,
427,428,428,428,428,428,428,428,428,428,428,429,429,429,429,429,429,429,429,429,
429,430,430,430,430,430,430,430,430,430,430,431,431,431,431,431,431,431,431,431,
431,432,432,432,432,432,432,432,432,432,432,433,433,433,433,433,433,433,433,433,
433,434,434,434,434,434,434,434,434,434,434,435,435,435,435,435,435,435,435,435,
435,435,436,436,436,436,436,436,436,436,436,436,437,437,437,437,437,437,437,437,
437,437,438,438,438,438,438,438,438,438,438,438,439,439,439,439,439,439,439,439,
439,439,440,440,440,440,440,440,440,440,440,440,441,441,441,441,441,441,441,441,
441,441,442,442,442,442,442,442,442,442,442,442,443,443,443,443,443,443,443,443,
443,443,443,444,444,444,444,444,444,444,444,444,444,445,445,445,445,445,445,445,
445,445,445,446,446,446,446,446,446,446,446,446,446,447,447,447,447,447,447,447,
447,447,447,448,448,448,448,448,448,448,448,448,448,448,449,449,449,449,449,449,
449,449,449,449,450,450,450,450,450,450,450,450,450,450,451,451,451,451,451,451,
451,451,451,451,452,452,452,452,452,452,452,452,452,452,453,453,453,453,453,453,
453,453,453,453,453,454,454,454,454,454,454,454,454,454,454,455,455,455,455,455,
455,455,455,455,455,456,456,456,456,456,456,456,456,456,456,457,457,457,457,457,
457,457,457,457,457,457,458,458,458,458,458,458,458,458,458,458,459,459,459,459,
459,459,459,459,459,459,460,460,460,460,460,460,460,460,460,460,460,461,461,461,
461,461,461,461,461,461,461,462,462,462,462,462,462,462,462,462,462,463,463,463,
463,463,463,463,463,463,463,463,464,464,464,464,464,464,464,464,464,464,465,465,
465,465,465,465,465,465,465,465,466,466,466,466,466,466,466,466,466,466,466,467,
467,467,467,467,467,467,467,467,467,468,468,468,468,468,468,468,468,468,468,469,
469,469,469,469,469,469,469,469,469,469,470,470,470,470,470,470,470,470,470,470,
471,471,471,471,471,471,471,471,471,471,472,472,472,472,472,472,472,472,472,472,
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 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, int *xr, uint32_t begin, uint32_t end, int table);
static int HuffmanCod1( short *ix, int *xr, 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);
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, 12 );
putlong( gi->address3>>1, 9 );
putlong( gi->global_gain, 8 );
putlong( gi->table_select[0], 10 );
putlong( gi->table_select[1], 5 );
putlong( gi->table_select[2], 5 );
putlong( gi->region_0_1, 7 );
putlong( gi->table_select[3], 3 );
}
}
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, 12);
putlong( gi->address3>>1, 9);
putlong( gi->global_gain, 8);
putlong( gi->table_select[0], 15);
putlong( gi->table_select[1], 5);
putlong( gi->table_select[2], 5);
putlong( gi->region_0_1, 7);
putlong( gi->table_select[3], 2);
}
}
/* 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, int *xr, 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;
if(region1 > 0)
bits += HuffmanCode(ix, xr, 0 , region1, gi->table_select[0]);
if(region2 > region1)
bits += HuffmanCode(ix, xr, region1, region2, gi->table_select[1]);
if(bigvals > region2)
bits += HuffmanCode(ix, xr, region2, bigvals, gi->table_select[2]);
if(count1 > bigvals)
bits += HuffmanCod1(ix, xr, 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, int *xr, 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[i+0] < 0 ? 1 : 0)
#define sgnw (xr[i+1] < 0 ? 1 : 0)
#define sgnx (xr[i+2] < 0 ? 1 : 0)
#define sgny (xr[i+3] < 0 ? 1 : 0)
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 = sgnv; break;
case 2: l=1; s = sgnw; break;
case 3: l=2; s = (sgnv << 1) + sgnw; break;
case 4: l=1; s = sgnx; break;
case 5: l=2; s = (sgnv << 1) + sgnx; break;
case 6: l=2; s = (sgnw << 1) + sgnx; break;
case 7: l=3; s = (sgnv << 2) + (sgnw << 1) + sgnx; break;
case 8: l=1; s = sgny; break;
case 9: l=2; s = (sgnv << 1) + sgny; break;
case 10: l=2; s = (sgnw << 1) + sgny; break;
case 11: l=3; s = (sgnv << 2) + (sgnw << 1) + sgny; break;
case 12: l=2; s = (sgnx << 1) + sgny; break;
case 13: l=3; s = (sgnv << 2) + (sgnx << 1) + sgny; break;
case 14: l=3; s = (sgnw << 2) + (sgnx << 1) + sgny; 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, int *xr, 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[i+0] < 0 ? 1 : 0)
#define sign_y (xr[i+1] < 0 ? 1 : 0)
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)
{
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. */
/***************************************************************************/
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). */
/*************************************************************************/
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) */
/*************************************************************************/
int quantize_int(int *xr, short *ix, side_info_t *si)
{
int i, s, frac_pow[] = { 0x10000, 0xd745, 0xb505, 0x9838 };
s = frac_pow[si->quantStep & 3] >> si->quantStep / 4;
/* check for integer overflow */
if(((si->max_val + 256) >> 8) * s >= (1622 << 8))
return 0;
for(i=SAMPL2; i--; )
ix[i] = int2idx[(abs(xr[i]) * s + 0x8000) >> 16];
return 1;
}
/*************************************************************************/
/* subdivides the bigvalue region which will use separate Huffman tables */
/*************************************************************************/
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 */
/*******************************************************************/
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;
}
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 */
/***********************************************************************/
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;
}
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 */
void window_subband1(short *wk, int sb0[SBLIMIT], int sb1[SBLIMIT]) ICODE_ATTR;
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
}
void window_subband2(short *x1, int a[SBLIMIT]) ICODE_ATTR;
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;
}
void mdct_long(int *out, int *in) ICODE_ATTR;
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)
{
if (type == 1 && !stereo && bitrate > 160)
bitrate = 160;
return ci->round_value_to_list32(bitrate,
&bitr_index[type][1], 14, true) + 1;
}
static int find_samplerate_index(long freq, int *mp3_type)
{
int mpeg = freq >= (32000+24000)/2 ? 1 : 0;
int i = ci->round_value_to_list32(freq, sampr_index[mpeg], 3, true);
*mp3_type = mpeg;
return i;
}
bool init_mp3_encoder_engine(int sample_rate,
int num_channels,
struct encoder_config *enc_cfg)
{
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,
enc_cfg->mp3_enc.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;
}
STATICIRAM void to_mono_mm(void) ICODE_ATTR;
STATICIRAM 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;
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 */
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) ICODE_ATTR;
static inline void byte_swap_frame32(uint32_t *dst, uint32_t *src,
size_t size)
{
uint32_t *src_end = SKIPBYTES(src, size);
do
{
*dst++ = swap32(*src++);
*dst++ = swap32(*src++);
*dst++ = swap32(*src++);
*dst++ = swap32(*src++);
*dst++ = swap32(*src++);
*dst++ = swap32(*src++);
*dst++ = swap32(*src++);
*dst++ = swap32(*src++);
}
while(src < src_end);
} /* byte_swap_frame32 */
#endif /* ROCKBOX_LITTLE_ENDIAN */
STATICIRAM void encode_frame(char *buffer, struct enc_chunk_hdr *chunk)
ICODE_ATTR;
STATICIRAM void encode_frame(char *buffer, struct enc_chunk_hdr *chunk)
{
int gr, gr_cnt;
int max, min;
/* 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;
/* 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 twice (if neccessary)
*/
shift = k = 14;
for(ii=0; ii<2 && 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 = min = 0;
for(k=0; k<576; k++)
{
mdct_freq[k] = shft13(mdct_freq[k]);
if(max < mdct_freq[k]) max = mdct_freq[k];
if(min > mdct_freq[k]) min = mdct_freq[k];
}
max = (max > -min) ? max : -min;
cfg.cod_info[gr][ch].max_val = (long)max;
/* calc new shift for higher integer precision */
for(k=0; max<(0x3c00>>k); k++);
shift = 12 - k;
}
cfg.cod_info[gr][ch].quantStep +=
cfg.cod_info[gr][ch].additStep;
/* 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_freq,
&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 */
/* called very often - inline */
static inline bool is_file_data_ok(struct enc_file_event_data *filed) ICODE_ATTR;
static inline bool is_file_data_ok(struct enc_file_event_data *filed)
{
return filed->rec_file >= 0 && (long)filed->chunk->flags >= 0;
} /* is_event_ok */
/* called very often - inline */
static inline bool on_write_chunk(struct enc_file_event_data *data) ICODE_ATTR;
static inline bool on_write_chunk(struct enc_file_event_data *data)
{
if (!is_file_data_ok(data))
return false;
if (data->chunk->enc_data == NULL)
{
#ifdef ROCKBOX_HAS_LOGF
ci->logf("mp3 enc: NULL data");
#endif
return true;
}
if (ci->write(data->rec_file, data->chunk->enc_data,
data->chunk->enc_size) != (ssize_t)data->chunk->enc_size)
return false;
data->num_pcm_samples += data->chunk->num_pcm;
return true;
} /* on_write_chunk */
static bool on_start_file(struct enc_file_event_data *data)
{
if ((data->chunk->flags & CHUNKF_ERROR) || *data->filename == '\0')
return false;
data->rec_file = ci->open(data->filename, O_RDWR|O_CREAT|O_TRUNC);
if (data->rec_file < 0)
return false;
/* reset sample count */
data->num_pcm_samples = 0;
return true;
} /* on_start_file */
static bool on_end_file(struct enc_file_event_data *data)
{
if (!is_file_data_ok(data))
return false;
ci->fsync(data->rec_file);
ci->close(data->rec_file);
data->rec_file = -1;
return true;
} /* on_end_file */
static void on_rec_new_stream(struct enc_buffer_event_data *data)
{
int num_frames = cfg.mpg.type == 1 ?
ENC_PADDING_FRAMES1 : ENC_PADDING_FRAMES2;
if (data->flags & CHUNKF_END_FILE)
{
/* add silent frames to end - encoder will also be flushed for start
of next file if any */
memset(res_buffer, 0, pcm_chunk_size);
/* the initial chunk given for the end is at enc_wr_index */
while (num_frames-- > 0)
{
data->chunk->enc_data = ENC_CHUNK_SKIP_HDR(data->chunk->enc_data,
data->chunk);
encode_frame(res_buffer, data->chunk);
data->chunk->num_pcm = samp_per_frame;
ci->enc_finish_chunk();
data->chunk = ci->enc_get_chunk();
}
}
else if (data->flags & CHUNKF_PRERECORD)
{
/* nothing to add and we cannot change prerecorded data */
}
else if (data->flags & CHUNKF_START_FILE)
{
/* starting fresh ... be sure to flush encoder first */
struct enc_chunk_hdr *chunk = ENC_CHUNK_HDR(res_buffer);
chunk->flags = 0;
chunk->enc_data = ENC_CHUNK_SKIP_HDR(chunk->enc_data, chunk);
while (num_frames-- > 0)
{
memset(chunk->enc_data, 0, pcm_chunk_size);
encode_frame(chunk->enc_data, chunk);
}
}
} /* on_rec_new_stream */
STATICIRAM void enc_events_callback(enum enc_events event, void *data)
ICODE_ATTR;
STATICIRAM void enc_events_callback(enum enc_events event, void *data)
{
if (event == ENC_WRITE_CHUNK)
{
if (on_write_chunk((struct enc_file_event_data *)data))
return;
}
else if (event == ENC_START_FILE)
{
if (on_start_file((struct enc_file_event_data *)data))
return;
}
else if (event == ENC_END_FILE)
{
if (on_end_file((struct enc_file_event_data *)data))
return;
}
else if (event == ENC_REC_NEW_STREAM)
{
on_rec_new_stream((struct enc_buffer_event_data *)data);
return;
}
else
{
return;
}
((struct enc_file_event_data *)data)->chunk->flags |= CHUNKF_ERROR;
} /* enc_events_callback */
static bool enc_init(void)
{
struct enc_inputs inputs;
struct enc_parameters params;
if (ci->enc_get_inputs == NULL ||
ci->enc_set_parameters == NULL ||
ci->enc_get_chunk == NULL ||
ci->enc_finish_chunk == NULL ||
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
ci->enc_pcm_buf_near_empty == NULL ||
#endif
ci->enc_get_pcm_data == NULL ||
ci->enc_unget_pcm_data == NULL )
return false;
ci->enc_get_inputs(&inputs);
if (inputs.config->afmt != AFMT_MPA_L3)
return false;
init_mp3_encoder_engine(inputs.sample_rate, inputs.num_channels,
inputs.config);
err = 0;
/* configure the buffer system */
params.afmt = AFMT_MPA_L3;
params.chunk_size = cfg.byte_per_frame + 1;
params.enc_sample_rate = cfg.samplerate;
/* need enough reserved bytes to hold one frame of pcm samples + hdr
for padding and flushing */
params.reserve_bytes = ENC_CHUNK_HDR_SIZE + pcm_chunk_size;
params.events_callback = enc_events_callback;
ci->enc_set_parameters(&params);
res_buffer = params.reserve_buffer;
#ifdef CPU_COLDFIRE
asm volatile ("move.l #0, %macsr"); /* integer mode */
#endif
return true;
} /* enc_init */
enum codec_status codec_main(void)
{
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
bool cpu_boosted;
#endif
/* Generic codec initialisation */
if (!enc_init())
{
ci->enc_codec_loaded = -1;
return CODEC_ERROR;
}
/* main application waits for this flag during encoder loading */
ci->enc_codec_loaded = 1;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
ci->cpu_boost(true);
cpu_boosted = true;
#endif
/* main encoding loop */
while (!ci->stop_codec)
{
char *buffer;
while ((buffer = ci->enc_get_pcm_data(pcm_chunk_size)) != NULL)
{
struct enc_chunk_hdr *chunk;
if (ci->stop_codec)
break;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
if (!cpu_boosted && ci->enc_pcm_buf_near_empty() == 0)
{
ci->cpu_boost(true);
cpu_boosted = true;
}
#endif
chunk = ci->enc_get_chunk();
chunk->enc_data = ENC_CHUNK_SKIP_HDR(chunk->enc_data, chunk);
encode_frame(buffer, chunk);
if (chunk->num_pcm < samp_per_frame)
{
ci->enc_unget_pcm_data(pcm_chunk_size - chunk->num_pcm*4);
chunk->num_pcm = samp_per_frame;
}
ci->enc_finish_chunk();
ci->yield();
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
if (cpu_boosted && ci->enc_pcm_buf_near_empty())
{
ci->cpu_boost(false);
cpu_boosted = false;
}
#endif
ci->yield();
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
if (cpu_boosted) /* set initial boost state */
ci->cpu_boost(false);
#endif
/* reset parameters to initial state */
ci->enc_set_parameters(NULL);
/* main application waits for this flag during encoder removing */
ci->enc_codec_loaded = 0;
return CODEC_OK;
} /* codec_start */
#endif /* ndef SIMULATOR */
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