Mercurial > SDL_sound_CoreAudio
changeset 261:9b6e82f7c853
Initial add.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 21 Feb 2002 19:46:09 +0000 |
| parents | 44a4730a1e6f |
| children | 6fe6de401b63 |
| files | decoders/mpglib.c decoders/mpglib/CHANGES decoders/mpglib/Makefile.am decoders/mpglib/README decoders/mpglib/README-sdlsound decoders/mpglib/TODO decoders/mpglib/common.c decoders/mpglib/dct64_i386.c decoders/mpglib/decode_i386.c decoders/mpglib/huffman.h decoders/mpglib/interface.c decoders/mpglib/l2tables.h decoders/mpglib/layer1.c decoders/mpglib/layer2.c decoders/mpglib/layer3.c decoders/mpglib/main.c decoders/mpglib/mpg123_sdlsound.h decoders/mpglib/mpglib_sdlsound.h decoders/mpglib/tabinit.c |
| diffstat | 18 files changed, 4567 insertions(+), 0 deletions(-) [+] |
line wrap: on
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,258 @@ +/* + * SDL_sound -- An abstract sound format decoding API. + * Copyright (C) 2001 Ryan C. Gordon. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * MPGLIB decoder for SDL_sound. This is a very lightweight MP3 decoder, + * which is included with the SDL_sound source, so that it doesn't rely on + * unnecessary external libraries. + * + * The SMPEG decoder plays back more forms of MPEGs, and may behave better or + * worse under various conditions. mpglib is (apparently) more efficient than + * SMPEG, and, again, doesn't need an external library. You should test both + * decoders and use what you find works best for you. + * + * mpglib is part of mpg123, which can be found in its original form at: + * http://www.mpg123.de/ + * + * Please see the file COPYING in the source's root directory. The included + * source code for mpglib falls under the LGPL, which is the same license as + * SDL_sound (so you can consider it a single work). + * + * This file written by Ryan C. Gordon. (icculus@clutteredmind.org) + */ + +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#ifdef SOUND_SUPPORTS_MPGLIB + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include "mpglib/mpg123_sdlsound.h" +#include "mpglib/mpglib_sdlsound.h" + +#include "SDL_sound.h" + +#define __SDL_SOUND_INTERNAL__ +#include "SDL_sound_internal.h" + +static int MPGLIB_init(void); +static void MPGLIB_quit(void); +static int MPGLIB_open(Sound_Sample *sample, const char *ext); +static void MPGLIB_close(Sound_Sample *sample); +static Uint32 MPGLIB_read(Sound_Sample *sample); +static int MPGLIB_rewind(Sound_Sample *sample); + +static const char *extensions_mpglib[] = { "MP3", NULL }; +const Sound_DecoderFunctions __Sound_DecoderFunctions_MPGLIB = +{ + { + extensions_mpglib, + "MP3 decoding via internal mpglib", + "Ryan C. Gordon <icculus@clutteredmind.org>", + "http://www.icculus.org/SDL_sound/" + }, + + MPGLIB_init, /* init() method */ + MPGLIB_quit, /* quit() method */ + MPGLIB_open, /* open() method */ + MPGLIB_close, /* close() method */ + MPGLIB_read, /* read() method */ + MPGLIB_rewind /* rewind() method */ +}; + + +/* this is what we store in our internal->decoder_private field... */ +typedef struct +{ + struct mpstr mp; + Uint8 inbuf[16384]; + Uint8 outbuf[8192]; + int outleft; + int outpos; +} mpglib_t; + + + +static int MPGLIB_init(void) +{ + return(1); /* always succeeds. */ +} /* MPGLIB_init */ + + +static void MPGLIB_quit(void) +{ + /* it's a no-op. */ +} /* MPGLIB_quit */ + + +static int MPGLIB_open(Sound_Sample *sample, const char *ext) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + mpglib_t *mpg = NULL; + + /* + * If I understand things correctly, MP3 files don't really have any + * magic header we can check for. The MP3 player is expected to just + * pick the first thing that looks like a valid frame and start + * playing from there. + * + * So here's what we do: If the caller insists that this is really + * MP3 we'll take his word for it. Otherwise, use the same test as + * SDL_mixer does and check if the stream starts with something that + * looks like a frame. + * + * A frame begins with 11 bits of frame sync (all bits must be set), + * followed by a two-bit MPEG Audio version ID: + * + * 00 - MPEG Version 2.5 (later extension of MPEG 2) + * 01 - reserved + * 10 - MPEG Version 2 (ISO/IEC 13818-3) + * 11 - MPEG Version 1 (ISO/IEC 11172-3) + * + * Apparently we don't handle MPEG Version 2.5. + */ + if (__Sound_strcasecmp(ext, "MP3") != 0) + { + Uint8 mp3_magic[2]; + + if (SDL_RWread(internal->rw, mp3_magic, sizeof (mp3_magic), 1) != 1) + { + Sound_SetError("MP3: Could not read MP3 magic."); + return(0); + } /*if */ + + if (mp3_magic[0] != 0xFF || (mp3_magic[1] & 0xF0) != 0xF0) + { + Sound_SetError("MP3: Not an MP3 stream."); + return(0); + } /* if */ + + /* !!! FIXME: If the seek fails, we'll probably miss a frame */ + SDL_RWseek(internal->rw, -sizeof (mp3_magic), SEEK_CUR); + } /* if */ + + mpg = (mpglib_t *) malloc(sizeof (mpglib_t)); + BAIL_IF_MACRO(mpg == NULL, ERR_OUT_OF_MEMORY, 0); + mpg->outpos = mpg->outleft = 0; + InitMP3(&mpg->mp); + + SNDDBG(("MPGLIB: Accepting data stream.\n")); + + internal->decoder_private = mpg; + sample->actual.rate = 44100; + sample->actual.channels = 2; + sample->actual.format = AUDIO_S16LSB; + sample->flags = SOUND_SAMPLEFLAG_NONE; + + return(1); /* we'll handle this data. */ +} /* MPGLIB_open */ + + +static void MPGLIB_close(Sound_Sample *sample) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + mpglib_t *mpg = ((mpglib_t *) internal->decoder_private); + ExitMP3(&mpg->mp); + free(mpg); +} /* MPGLIB_close */ + + +static Uint32 MPGLIB_read(Sound_Sample *sample) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + mpglib_t *mpg = ((mpglib_t *) internal->decoder_private); + Uint32 bw = 0; + int rc; + + while (bw < internal->buffer_size) + { + if (mpg->outleft > 0) + { + Uint16 cpysize = internal->buffer_size - bw; + if (cpysize > mpg->outleft) + cpysize = mpg->outleft; + memcpy(((Uint8 *) internal->buffer) + bw, + mpg->outbuf + mpg->outpos, cpysize); + bw += cpysize; + mpg->outpos += cpysize; + mpg->outleft -= cpysize; + continue; + } /* if */ + + /* need to decode more from the MP3 stream... */ + mpg->outpos = 0; + rc = decodeMP3(&mpg->mp, NULL, 0, mpg->outbuf, + sizeof (mpg->outbuf), &mpg->outleft); + if (rc == MP3_ERR) + { + sample->flags |= SOUND_SAMPLEFLAG_ERROR; + return(bw); + } /* if */ + + else if (rc == MP3_NEED_MORE) + { + rc = SDL_RWread(internal->rw, mpg->inbuf, 1, sizeof (mpg->inbuf)); + if (rc == -1) + { + sample->flags |= SOUND_SAMPLEFLAG_ERROR; + return(bw); + } /* if */ + else if (rc == 0) + { + sample->flags |= SOUND_SAMPLEFLAG_EOF; + return(bw); + } /* else if */ + + rc = decodeMP3(&mpg->mp, mpg->inbuf, sizeof (mpg->inbuf), + mpg->outbuf, sizeof (mpg->outbuf), &mpg->outleft); + if (rc == MP3_ERR) + { + sample->flags |= SOUND_SAMPLEFLAG_ERROR; + return(bw); + } /* if */ + } /* else if */ + } /* while */ + + return(bw); +} /* MPGLIB_read */ + + +static int MPGLIB_rewind(Sound_Sample *sample) +{ + Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; + mpglib_t *mpg = ((mpglib_t *) internal->decoder_private); + BAIL_IF_MACRO(SDL_RWseek(internal->rw, 0, SEEK_SET) != 0, ERR_IO_ERROR, 0); + + /* this is just resetting some fields in a structure; it's very fast. */ + ExitMP3(&mpg->mp); + InitMP3(&mpg->mp); + mpg->outpos = mpg->outleft = 0; + return(1); +} /* MPGLIB_rewind */ + + +#endif /* SOUND_SUPPORTS_MPGLIB */ + + +/* end of mpglib.c ... */ +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/CHANGES Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,4 @@ +14/Oct/1999: + - VBR fix + - Layer2 and Layer1 added +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/Makefile.am Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,24 @@ +noinst_LTLIBRARIES = libmpglib.la + +INCLUDES = -I$(top_srcdir) +CFLAGS = -DLAYER1 -DLAYER2 -DLAYER3 + +if USE_MPGLIB +libmpglib_la_SOURCES = \ + common.c \ + huffman.h \ + layer1.c \ + tabinit.c \ + dct64_i386.c \ + interface.c \ + layer2.c \ + mpg123_sdlsound.h \ + decode_i386.c \ + l2tables.h \ + layer3.c \ + mpglib_sdlsound.h +else +libmpglib_la_SOURCES = +endif + +#EXTRA_DIST = FAQ README CHANGES TODO
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/README Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,39 @@ +MP3 library +----------- +Version 0.2a + +This decoder is a 'light' version (thrown out all unnecessay parts) +from the mpg123 package. I made this for a company. + +Currently only Layer3 is enabled to save some space. Layer1,2 isn't +tested at all. The interface will not change significantly. +A backport to the mpg123 package is planed. + +compiled and tested only on Solaris 2.6 +main.c contains a simple demo application for library. + +COPYING: you may use this source under LGPL terms! + (Yes, I switched to LGPL for the _mpglib_ part!) + +PLEASE NOTE: This software may contain patented algorithms (at least + patented in some countries). It may be not allowed to sell/use products + based on this source code in these countries. Check this out first! + +COPYRIGHT of MP3 music: + Please note, that the duplicating of copyrighted music without explicit + permission violates the rights of the owner. + +SENDING PATCHES: + The current version is under LGPL. Please consider this when sending patches or + changes. I also want to have the freedom to sell the code to companies that + cannot or do not want to use the code under LGPL. So, if you send me + significant patches, I need your explicit permission to do this. Of course, + there will always be the LGPLed open source version of the 100% same code. + In the case you cannot accept this: the code is free, it's your freedom + to distribute your changes again under LGPL. + +FEEDBACK: + I'm interessted to here from you, when you use this package as part + of another project. + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/README-sdlsound Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,7 @@ +This package, according to the README, is under the LGPL, which means it uses +the same license as SDL_sound. + +mpglib is part of mpg123, which can be found at http://www.mpg123.de/ ... + +--ryan. +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/common.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,241 @@ +#include <ctype.h> +#include <stdlib.h> +#include <signal.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#include "mpg123_sdlsound.h" + +struct parameter param = { 1 , 1 , 0 , 0 }; + +int tabsel_123[2][3][16] = { + { {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,}, + {0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,}, + {0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} }, + + { {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,}, + {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,}, + {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} } +}; + +long freqs[9] = { 44100, 48000, 32000, + 22050, 24000, 16000 , + 11025 , 12000 , 8000 }; + +int bitindex; +unsigned char *wordpointer; +unsigned char *pcm_sample; +int pcm_point = 0; + + +#define HDRCMPMASK 0xfffffd00 + +#if 0 +int head_check(unsigned long head) +{ + if( (head & 0xffe00000) != 0xffe00000) + return FALSE; + if(!((head>>17)&3)) + return FALSE; + if( ((head>>12)&0xf) == 0xf) + return FALSE; + if( ((head>>10)&0x3) == 0x3 ) + return FALSE; + return TRUE; +} +#endif + + +/* + * the code a header and write the information + * into the frame structure + */ +int decode_header(struct frame *fr,unsigned long newhead) +{ + if( newhead & (1<<20) ) { + fr->lsf = (newhead & (1<<19)) ? 0x0 : 0x1; + fr->mpeg25 = 0; + } + else { + fr->lsf = 1; + fr->mpeg25 = 1; + } + + fr->lay = 4-((newhead>>17)&3); + if( ((newhead>>10)&0x3) == 0x3) { + fprintf(stderr,"Stream error\n"); + exit(1); + } + if(fr->mpeg25) { + fr->sampling_frequency = 6 + ((newhead>>10)&0x3); + } + else + fr->sampling_frequency = ((newhead>>10)&0x3) + (fr->lsf*3); + fr->error_protection = ((newhead>>16)&0x1)^0x1; + + if(fr->mpeg25) /* allow Bitrate change for 2.5 ... */ + fr->bitrate_index = ((newhead>>12)&0xf); + + fr->bitrate_index = ((newhead>>12)&0xf); + fr->padding = ((newhead>>9)&0x1); + fr->extension = ((newhead>>8)&0x1); + fr->mode = ((newhead>>6)&0x3); + fr->mode_ext = ((newhead>>4)&0x3); + fr->copyright = ((newhead>>3)&0x1); + fr->original = ((newhead>>2)&0x1); + fr->emphasis = newhead & 0x3; + + fr->stereo = (fr->mode == MPG_MD_MONO) ? 1 : 2; + + if(!fr->bitrate_index) + { + fprintf(stderr,"Free format not supported.\n"); + return (0); + } + + switch(fr->lay) + { + case 1: +#ifdef LAYER1 +#if 0 + fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ? + (fr->mode_ext<<2)+4 : 32; +#endif + fr->framesize = (long) tabsel_123[fr->lsf][0][fr->bitrate_index] * 12000; + fr->framesize /= freqs[fr->sampling_frequency]; + fr->framesize = ((fr->framesize+fr->padding)<<2)-4; +#else + fprintf(stderr,"Not supported!\n"); +#endif + break; + case 2: +#ifdef LAYER2 +#if 0 + fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ? + (fr->mode_ext<<2)+4 : fr->II_sblimit; +#endif + fr->framesize = (long) tabsel_123[fr->lsf][1][fr->bitrate_index] * 144000; + fr->framesize /= freqs[fr->sampling_frequency]; + fr->framesize += fr->padding - 4; +#else + fprintf(stderr,"Not supported!\n"); +#endif + break; + case 3: +#if 0 + fr->do_layer = do_layer3; + if(fr->lsf) + ssize = (fr->stereo == 1) ? 9 : 17; + else + ssize = (fr->stereo == 1) ? 17 : 32; +#endif + +#if 0 + if(fr->error_protection) + ssize += 2; +#endif + fr->framesize = (long) tabsel_123[fr->lsf][2][fr->bitrate_index] * 144000; + fr->framesize /= freqs[fr->sampling_frequency]<<(fr->lsf); + fr->framesize = fr->framesize + fr->padding - 4; + break; + default: + fprintf(stderr,"Sorry, unknown layer type.\n"); + return (0); + } + return 1; +} + +#if 0 +void print_header(struct frame *fr) +{ + static char *modes[4] = { "Stereo", "Joint-Stereo", "Dual-Channel", "Single-Channel" }; + static char *layers[4] = { "Unknown" , "I", "II", "III" }; + + fprintf(stderr,"MPEG %s, Layer: %s, Freq: %ld, mode: %s, modext: %d, BPF : %d\n", + fr->mpeg25 ? "2.5" : (fr->lsf ? "2.0" : "1.0"), + layers[fr->lay],freqs[fr->sampling_frequency], + modes[fr->mode],fr->mode_ext,fr->framesize+4); + fprintf(stderr,"Channels: %d, copyright: %s, original: %s, CRC: %s, emphasis: %d.\n", + fr->stereo,fr->copyright?"Yes":"No", + fr->original?"Yes":"No",fr->error_protection?"Yes":"No", + fr->emphasis); + fprintf(stderr,"Bitrate: %d Kbits/s, Extension value: %d\n", + tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index],fr->extension); +} + +void print_header_compact(struct frame *fr) +{ + static char *modes[4] = { "stereo", "joint-stereo", "dual-channel", "mono" }; + static char *layers[4] = { "Unknown" , "I", "II", "III" }; + + fprintf(stderr,"MPEG %s layer %s, %d kbit/s, %ld Hz %s\n", + fr->mpeg25 ? "2.5" : (fr->lsf ? "2.0" : "1.0"), + layers[fr->lay], + tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index], + freqs[fr->sampling_frequency], modes[fr->mode]); +} + +#endif + +unsigned int getbits(int number_of_bits) +{ + unsigned long rval; + + if(!number_of_bits) + return 0; + + { + rval = wordpointer[0]; + rval <<= 8; + rval |= wordpointer[1]; + rval <<= 8; + rval |= wordpointer[2]; + rval <<= bitindex; + rval &= 0xffffff; + + bitindex += number_of_bits; + + rval >>= (24-number_of_bits); + + wordpointer += (bitindex>>3); + bitindex &= 7; + } + return rval; +} + +unsigned int getbits_fast(int number_of_bits) +{ + unsigned long rval; + + { + rval = wordpointer[0]; + rval <<= 8; + rval |= wordpointer[1]; + rval <<= bitindex; + rval &= 0xffff; + bitindex += number_of_bits; + + rval >>= (16-number_of_bits); + + wordpointer += (bitindex>>3); + bitindex &= 7; + } + return rval; +} + +unsigned int get1bit(void) +{ + unsigned char rval; + rval = *wordpointer << bitindex; + + bitindex++; + wordpointer += (bitindex>>3); + bitindex &= 7; + + return rval>>7; +} + + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/dct64_i386.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,315 @@ + +/* + * Discrete Cosine Tansform (DCT) for subband synthesis + * optimized for machines with no auto-increment. + * The performance is highly compiler dependend. Maybe + * the dct64.c version for 'normal' processor may be faster + * even for Intel processors. + */ + +#include "mpg123_sdlsound.h" + +static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples) +{ + + { + register real *costab = pnts[0]; + + b1[0x00] = samples[0x00] + samples[0x1F]; + b1[0x1F] = (samples[0x00] - samples[0x1F]) * costab[0x0]; + + b1[0x01] = samples[0x01] + samples[0x1E]; + b1[0x1E] = (samples[0x01] - samples[0x1E]) * costab[0x1]; + + b1[0x02] = samples[0x02] + samples[0x1D]; + b1[0x1D] = (samples[0x02] - samples[0x1D]) * costab[0x2]; + + b1[0x03] = samples[0x03] + samples[0x1C]; + b1[0x1C] = (samples[0x03] - samples[0x1C]) * costab[0x3]; + + b1[0x04] = samples[0x04] + samples[0x1B]; + b1[0x1B] = (samples[0x04] - samples[0x1B]) * costab[0x4]; + + b1[0x05] = samples[0x05] + samples[0x1A]; + b1[0x1A] = (samples[0x05] - samples[0x1A]) * costab[0x5]; + + b1[0x06] = samples[0x06] + samples[0x19]; + b1[0x19] = (samples[0x06] - samples[0x19]) * costab[0x6]; + + b1[0x07] = samples[0x07] + samples[0x18]; + b1[0x18] = (samples[0x07] - samples[0x18]) * costab[0x7]; + + b1[0x08] = samples[0x08] + samples[0x17]; + b1[0x17] = (samples[0x08] - samples[0x17]) * costab[0x8]; + + b1[0x09] = samples[0x09] + samples[0x16]; + b1[0x16] = (samples[0x09] - samples[0x16]) * costab[0x9]; + + b1[0x0A] = samples[0x0A] + samples[0x15]; + b1[0x15] = (samples[0x0A] - samples[0x15]) * costab[0xA]; + + b1[0x0B] = samples[0x0B] + samples[0x14]; + b1[0x14] = (samples[0x0B] - samples[0x14]) * costab[0xB]; + + b1[0x0C] = samples[0x0C] + samples[0x13]; + b1[0x13] = (samples[0x0C] - samples[0x13]) * costab[0xC]; + + b1[0x0D] = samples[0x0D] + samples[0x12]; + b1[0x12] = (samples[0x0D] - samples[0x12]) * costab[0xD]; + + b1[0x0E] = samples[0x0E] + samples[0x11]; + b1[0x11] = (samples[0x0E] - samples[0x11]) * costab[0xE]; + + b1[0x0F] = samples[0x0F] + samples[0x10]; + b1[0x10] = (samples[0x0F] - samples[0x10]) * costab[0xF]; + } + + + { + register real *costab = pnts[1]; + + b2[0x00] = b1[0x00] + b1[0x0F]; + b2[0x0F] = (b1[0x00] - b1[0x0F]) * costab[0]; + b2[0x01] = b1[0x01] + b1[0x0E]; + b2[0x0E] = (b1[0x01] - b1[0x0E]) * costab[1]; + b2[0x02] = b1[0x02] + b1[0x0D]; + b2[0x0D] = (b1[0x02] - b1[0x0D]) * costab[2]; + b2[0x03] = b1[0x03] + b1[0x0C]; + b2[0x0C] = (b1[0x03] - b1[0x0C]) * costab[3]; + b2[0x04] = b1[0x04] + b1[0x0B]; + b2[0x0B] = (b1[0x04] - b1[0x0B]) * costab[4]; + b2[0x05] = b1[0x05] + b1[0x0A]; + b2[0x0A] = (b1[0x05] - b1[0x0A]) * costab[5]; + b2[0x06] = b1[0x06] + b1[0x09]; + b2[0x09] = (b1[0x06] - b1[0x09]) * costab[6]; + b2[0x07] = b1[0x07] + b1[0x08]; + b2[0x08] = (b1[0x07] - b1[0x08]) * costab[7]; + + b2[0x10] = b1[0x10] + b1[0x1F]; + b2[0x1F] = (b1[0x1F] - b1[0x10]) * costab[0]; + b2[0x11] = b1[0x11] + b1[0x1E]; + b2[0x1E] = (b1[0x1E] - b1[0x11]) * costab[1]; + b2[0x12] = b1[0x12] + b1[0x1D]; + b2[0x1D] = (b1[0x1D] - b1[0x12]) * costab[2]; + b2[0x13] = b1[0x13] + b1[0x1C]; + b2[0x1C] = (b1[0x1C] - b1[0x13]) * costab[3]; + b2[0x14] = b1[0x14] + b1[0x1B]; + b2[0x1B] = (b1[0x1B] - b1[0x14]) * costab[4]; + b2[0x15] = b1[0x15] + b1[0x1A]; + b2[0x1A] = (b1[0x1A] - b1[0x15]) * costab[5]; + b2[0x16] = b1[0x16] + b1[0x19]; + b2[0x19] = (b1[0x19] - b1[0x16]) * costab[6]; + b2[0x17] = b1[0x17] + b1[0x18]; + b2[0x18] = (b1[0x18] - b1[0x17]) * costab[7]; + } + + { + register real *costab = pnts[2]; + + b1[0x00] = b2[0x00] + b2[0x07]; + b1[0x07] = (b2[0x00] - b2[0x07]) * costab[0]; + b1[0x01] = b2[0x01] + b2[0x06]; + b1[0x06] = (b2[0x01] - b2[0x06]) * costab[1]; + b1[0x02] = b2[0x02] + b2[0x05]; + b1[0x05] = (b2[0x02] - b2[0x05]) * costab[2]; + b1[0x03] = b2[0x03] + b2[0x04]; + b1[0x04] = (b2[0x03] - b2[0x04]) * costab[3]; + + b1[0x08] = b2[0x08] + b2[0x0F]; + b1[0x0F] = (b2[0x0F] - b2[0x08]) * costab[0]; + b1[0x09] = b2[0x09] + b2[0x0E]; + b1[0x0E] = (b2[0x0E] - b2[0x09]) * costab[1]; + b1[0x0A] = b2[0x0A] + b2[0x0D]; + b1[0x0D] = (b2[0x0D] - b2[0x0A]) * costab[2]; + b1[0x0B] = b2[0x0B] + b2[0x0C]; + b1[0x0C] = (b2[0x0C] - b2[0x0B]) * costab[3]; + + b1[0x10] = b2[0x10] + b2[0x17]; + b1[0x17] = (b2[0x10] - b2[0x17]) * costab[0]; + b1[0x11] = b2[0x11] + b2[0x16]; + b1[0x16] = (b2[0x11] - b2[0x16]) * costab[1]; + b1[0x12] = b2[0x12] + b2[0x15]; + b1[0x15] = (b2[0x12] - b2[0x15]) * costab[2]; + b1[0x13] = b2[0x13] + b2[0x14]; + b1[0x14] = (b2[0x13] - b2[0x14]) * costab[3]; + + b1[0x18] = b2[0x18] + b2[0x1F]; + b1[0x1F] = (b2[0x1F] - b2[0x18]) * costab[0]; + b1[0x19] = b2[0x19] + b2[0x1E]; + b1[0x1E] = (b2[0x1E] - b2[0x19]) * costab[1]; + b1[0x1A] = b2[0x1A] + b2[0x1D]; + b1[0x1D] = (b2[0x1D] - b2[0x1A]) * costab[2]; + b1[0x1B] = b2[0x1B] + b2[0x1C]; + b1[0x1C] = (b2[0x1C] - b2[0x1B]) * costab[3]; + } + + { + register real const cos0 = pnts[3][0]; + register real const cos1 = pnts[3][1]; + + b2[0x00] = b1[0x00] + b1[0x03]; + b2[0x03] = (b1[0x00] - b1[0x03]) * cos0; + b2[0x01] = b1[0x01] + b1[0x02]; + b2[0x02] = (b1[0x01] - b1[0x02]) * cos1; + + b2[0x04] = b1[0x04] + b1[0x07]; + b2[0x07] = (b1[0x07] - b1[0x04]) * cos0; + b2[0x05] = b1[0x05] + b1[0x06]; + b2[0x06] = (b1[0x06] - b1[0x05]) * cos1; + + b2[0x08] = b1[0x08] + b1[0x0B]; + b2[0x0B] = (b1[0x08] - b1[0x0B]) * cos0; + b2[0x09] = b1[0x09] + b1[0x0A]; + b2[0x0A] = (b1[0x09] - b1[0x0A]) * cos1; + + b2[0x0C] = b1[0x0C] + b1[0x0F]; + b2[0x0F] = (b1[0x0F] - b1[0x0C]) * cos0; + b2[0x0D] = b1[0x0D] + b1[0x0E]; + b2[0x0E] = (b1[0x0E] - b1[0x0D]) * cos1; + + b2[0x10] = b1[0x10] + b1[0x13]; + b2[0x13] = (b1[0x10] - b1[0x13]) * cos0; + b2[0x11] = b1[0x11] + b1[0x12]; + b2[0x12] = (b1[0x11] - b1[0x12]) * cos1; + + b2[0x14] = b1[0x14] + b1[0x17]; + b2[0x17] = (b1[0x17] - b1[0x14]) * cos0; + b2[0x15] = b1[0x15] + b1[0x16]; + b2[0x16] = (b1[0x16] - b1[0x15]) * cos1; + + b2[0x18] = b1[0x18] + b1[0x1B]; + b2[0x1B] = (b1[0x18] - b1[0x1B]) * cos0; + b2[0x19] = b1[0x19] + b1[0x1A]; + b2[0x1A] = (b1[0x19] - b1[0x1A]) * cos1; + + b2[0x1C] = b1[0x1C] + b1[0x1F]; + b2[0x1F] = (b1[0x1F] - b1[0x1C]) * cos0; + b2[0x1D] = b1[0x1D] + b1[0x1E]; + b2[0x1E] = (b1[0x1E] - b1[0x1D]) * cos1; + } + + { + register real const cos0 = pnts[4][0]; + + b1[0x00] = b2[0x00] + b2[0x01]; + b1[0x01] = (b2[0x00] - b2[0x01]) * cos0; + b1[0x02] = b2[0x02] + b2[0x03]; + b1[0x03] = (b2[0x03] - b2[0x02]) * cos0; + b1[0x02] += b1[0x03]; + + b1[0x04] = b2[0x04] + b2[0x05]; + b1[0x05] = (b2[0x04] - b2[0x05]) * cos0; + b1[0x06] = b2[0x06] + b2[0x07]; + b1[0x07] = (b2[0x07] - b2[0x06]) * cos0; + b1[0x06] += b1[0x07]; + b1[0x04] += b1[0x06]; + b1[0x06] += b1[0x05]; + b1[0x05] += b1[0x07]; + + b1[0x08] = b2[0x08] + b2[0x09]; + b1[0x09] = (b2[0x08] - b2[0x09]) * cos0; + b1[0x0A] = b2[0x0A] + b2[0x0B]; + b1[0x0B] = (b2[0x0B] - b2[0x0A]) * cos0; + b1[0x0A] += b1[0x0B]; + + b1[0x0C] = b2[0x0C] + b2[0x0D]; + b1[0x0D] = (b2[0x0C] - b2[0x0D]) * cos0; + b1[0x0E] = b2[0x0E] + b2[0x0F]; + b1[0x0F] = (b2[0x0F] - b2[0x0E]) * cos0; + b1[0x0E] += b1[0x0F]; + b1[0x0C] += b1[0x0E]; + b1[0x0E] += b1[0x0D]; + b1[0x0D] += b1[0x0F]; + + b1[0x10] = b2[0x10] + b2[0x11]; + b1[0x11] = (b2[0x10] - b2[0x11]) * cos0; + b1[0x12] = b2[0x12] + b2[0x13]; + b1[0x13] = (b2[0x13] - b2[0x12]) * cos0; + b1[0x12] += b1[0x13]; + + b1[0x14] = b2[0x14] + b2[0x15]; + b1[0x15] = (b2[0x14] - b2[0x15]) * cos0; + b1[0x16] = b2[0x16] + b2[0x17]; + b1[0x17] = (b2[0x17] - b2[0x16]) * cos0; + b1[0x16] += b1[0x17]; + b1[0x14] += b1[0x16]; + b1[0x16] += b1[0x15]; + b1[0x15] += b1[0x17]; + + b1[0x18] = b2[0x18] + b2[0x19]; + b1[0x19] = (b2[0x18] - b2[0x19]) * cos0; + b1[0x1A] = b2[0x1A] + b2[0x1B]; + b1[0x1B] = (b2[0x1B] - b2[0x1A]) * cos0; + b1[0x1A] += b1[0x1B]; + + b1[0x1C] = b2[0x1C] + b2[0x1D]; + b1[0x1D] = (b2[0x1C] - b2[0x1D]) * cos0; + b1[0x1E] = b2[0x1E] + b2[0x1F]; + b1[0x1F] = (b2[0x1F] - b2[0x1E]) * cos0; + b1[0x1E] += b1[0x1F]; + b1[0x1C] += b1[0x1E]; + b1[0x1E] += b1[0x1D]; + b1[0x1D] += b1[0x1F]; + } + + out0[0x10*16] = b1[0x00]; + out0[0x10*12] = b1[0x04]; + out0[0x10* 8] = b1[0x02]; + out0[0x10* 4] = b1[0x06]; + out0[0x10* 0] = b1[0x01]; + out1[0x10* 0] = b1[0x01]; + out1[0x10* 4] = b1[0x05]; + out1[0x10* 8] = b1[0x03]; + out1[0x10*12] = b1[0x07]; + + b1[0x08] += b1[0x0C]; + out0[0x10*14] = b1[0x08]; + b1[0x0C] += b1[0x0a]; + out0[0x10*10] = b1[0x0C]; + b1[0x0A] += b1[0x0E]; + out0[0x10* 6] = b1[0x0A]; + b1[0x0E] += b1[0x09]; + out0[0x10* 2] = b1[0x0E]; + b1[0x09] += b1[0x0D]; + out1[0x10* 2] = b1[0x09]; + b1[0x0D] += b1[0x0B]; + out1[0x10* 6] = b1[0x0D]; + b1[0x0B] += b1[0x0F]; + out1[0x10*10] = b1[0x0B]; + out1[0x10*14] = b1[0x0F]; + + b1[0x18] += b1[0x1C]; + out0[0x10*15] = b1[0x10] + b1[0x18]; + out0[0x10*13] = b1[0x18] + b1[0x14]; + b1[0x1C] += b1[0x1a]; + out0[0x10*11] = b1[0x14] + b1[0x1C]; + out0[0x10* 9] = b1[0x1C] + b1[0x12]; + b1[0x1A] += b1[0x1E]; + out0[0x10* 7] = b1[0x12] + b1[0x1A]; + out0[0x10* 5] = b1[0x1A] + b1[0x16]; + b1[0x1E] += b1[0x19]; + out0[0x10* 3] = b1[0x16] + b1[0x1E]; + out0[0x10* 1] = b1[0x1E] + b1[0x11]; + b1[0x19] += b1[0x1D]; + out1[0x10* 1] = b1[0x11] + b1[0x19]; + out1[0x10* 3] = b1[0x19] + b1[0x15]; + b1[0x1D] += b1[0x1B]; + out1[0x10* 5] = b1[0x15] + b1[0x1D]; + out1[0x10* 7] = b1[0x1D] + b1[0x13]; + b1[0x1B] += b1[0x1F]; + out1[0x10* 9] = b1[0x13] + b1[0x1B]; + out1[0x10*11] = b1[0x1B] + b1[0x17]; + out1[0x10*13] = b1[0x17] + b1[0x1F]; + out1[0x10*15] = b1[0x1F]; +} + +/* + * the call via dct64 is a trick to force GCC to use + * (new) registers for the b1,b2 pointer to the bufs[xx] field + */ +void dct64(real *a,real *b,real *c) +{ + real bufs[0x40]; + dct64_1(a,b,bufs,bufs+0x20,c); +} +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/decode_i386.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,153 @@ +/* + * Mpeg Layer-1,2,3 audio decoder + * ------------------------------ + * copyright (c) 1995,1996,1997 by Michael Hipp, All rights reserved. + * See also 'README' + * + * slighlty optimized for machines without autoincrement/decrement. + * The performance is highly compiler dependend. Maybe + * the decode.c version for 'normal' processor may be faster + * even for Intel processors. + */ + +#include <stdlib.h> +#include <math.h> +#include <string.h> + +#include "mpg123_sdlsound.h" +#include "mpglib_sdlsound.h" + +extern struct mpstr *gmp; + + /* old WRITE_SAMPLE */ +#define WRITE_SAMPLE(samples,sum,clip) \ + if( (sum) > 32767.0) { *(samples) = 0x7fff; (clip)++; } \ + else if( (sum) < -32768.0) { *(samples) = -0x8000; (clip)++; } \ + else { *(samples) = sum; } + +int synth_1to1_mono(real *bandPtr,unsigned char *samples,int *pnt) +{ + short samples_tmp[64]; + short *tmp1 = samples_tmp; + int i,ret; + int pnt1 = 0; + + ret = synth_1to1(bandPtr,0,(unsigned char *) samples_tmp,&pnt1); + samples += *pnt; + + for(i=0;i<32;i++) { + *( (short *) samples) = *tmp1; + samples += 2; + tmp1 += 2; + } + *pnt += 64; + + return ret; +} + + +int synth_1to1(real *bandPtr,int channel,unsigned char *out,int *pnt) +{ + static const int step = 2; + int bo; + short *samples = (short *) (out + *pnt); + + real *b0,(*buf)[0x110]; + int clip = 0; + int bo1; + + bo = gmp->synth_bo; + + if(!channel) { + bo--; + bo &= 0xf; + buf = gmp->synth_buffs[0]; + } + else { + samples++; + buf = gmp->synth_buffs[1]; + } + + if(bo & 0x1) { + b0 = buf[0]; + bo1 = bo; + dct64(buf[1]+((bo+1)&0xf),buf[0]+bo,bandPtr); + } + else { + b0 = buf[1]; + bo1 = bo+1; + dct64(buf[0]+bo,buf[1]+bo+1,bandPtr); + } + + gmp->synth_bo = bo; + + { + register int j; + real *window = decwin + 16 - bo1; + + for (j=16;j;j--,b0+=0x10,window+=0x20,samples+=step) + { + real sum; + sum = window[0x0] * b0[0x0]; + sum -= window[0x1] * b0[0x1]; + sum += window[0x2] * b0[0x2]; + sum -= window[0x3] * b0[0x3]; + sum += window[0x4] * b0[0x4]; + sum -= window[0x5] * b0[0x5]; + sum += window[0x6] * b0[0x6]; + sum -= window[0x7] * b0[0x7]; + sum += window[0x8] * b0[0x8]; + sum -= window[0x9] * b0[0x9]; + sum += window[0xA] * b0[0xA]; + sum -= window[0xB] * b0[0xB]; + sum += window[0xC] * b0[0xC]; + sum -= window[0xD] * b0[0xD]; + sum += window[0xE] * b0[0xE]; + sum -= window[0xF] * b0[0xF]; + + WRITE_SAMPLE(samples,sum,clip); + } + + { + real sum; + sum = window[0x0] * b0[0x0]; + sum += window[0x2] * b0[0x2]; + sum += window[0x4] * b0[0x4]; + sum += window[0x6] * b0[0x6]; + sum += window[0x8] * b0[0x8]; + sum += window[0xA] * b0[0xA]; + sum += window[0xC] * b0[0xC]; + sum += window[0xE] * b0[0xE]; + WRITE_SAMPLE(samples,sum,clip); + b0-=0x10,window-=0x20,samples+=step; + } + window += bo1<<1; + + for (j=15;j;j--,b0-=0x10,window-=0x20,samples+=step) + { + real sum; + sum = -window[-0x1] * b0[0x0]; + sum -= window[-0x2] * b0[0x1]; + sum -= window[-0x3] * b0[0x2]; + sum -= window[-0x4] * b0[0x3]; + sum -= window[-0x5] * b0[0x4]; + sum -= window[-0x6] * b0[0x5]; + sum -= window[-0x7] * b0[0x6]; + sum -= window[-0x8] * b0[0x7]; + sum -= window[-0x9] * b0[0x8]; + sum -= window[-0xA] * b0[0x9]; + sum -= window[-0xB] * b0[0xA]; + sum -= window[-0xC] * b0[0xB]; + sum -= window[-0xD] * b0[0xC]; + sum -= window[-0xE] * b0[0xD]; + sum -= window[-0xF] * b0[0xE]; + sum -= window[-0x0] * b0[0xF]; + + WRITE_SAMPLE(samples,sum,clip); + } + } + *pnt += 128; + + return clip; +} +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/huffman.h Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,332 @@ +/* + * huffman tables ... recalcualted to work with my optimzed + * decoder scheme (MH) + * + * probably we could save a few bytes of memory, because the + * smaller tables are often the part of a bigger table + */ + +struct newhuff +{ + unsigned int linbits; + short *table; +}; + +static short tab0[] = +{ + 0 +}; + +static short tab1[] = +{ + -5, -3, -1, 17, 1, 16, 0 +}; + +static short tab2[] = +{ + -15, -11, -9, -5, -3, -1, 34, 2, 18, -1, 33, 32, 17, -1, 1, + 16, 0 +}; + +static short tab3[] = +{ + -13, -11, -9, -5, -3, -1, 34, 2, 18, -1, 33, 32, 16, 17, -1, + 1, 0 +}; + +static short tab5[] = +{ + -29, -25, -23, -15, -7, -5, -3, -1, 51, 35, 50, 49, -3, -1, 19, + 3, -1, 48, 34, -3, -1, 18, 33, -1, 2, 32, 17, -1, 1, 16, + 0 +}; + +static short tab6[] = +{ + -25, -19, -13, -9, -5, -3, -1, 51, 3, 35, -1, 50, 48, -1, 19, + 49, -3, -1, 34, 2, 18, -3, -1, 33, 32, 1, -1, 17, -1, 16, + 0 +}; + +static short tab7[] = +{ + -69, -65, -57, -39, -29, -17, -11, -7, -3, -1, 85, 69, -1, 84, 83, + -1, 53, 68, -3, -1, 37, 82, 21, -5, -1, 81, -1, 5, 52, -1, + 80, -1, 67, 51, -5, -3, -1, 36, 66, 20, -1, 65, 64, -11, -7, + -3, -1, 4, 35, -1, 50, 3, -1, 19, 49, -3, -1, 48, 34, 18, + -5, -1, 33, -1, 2, 32, 17, -1, 1, 16, 0 +}; + +static short tab8[] = +{ + -65, -63, -59, -45, -31, -19, -13, -7, -5, -3, -1, 85, 84, 69, 83, + -3, -1, 53, 68, 37, -3, -1, 82, 5, 21, -5, -1, 81, -1, 52, + 67, -3, -1, 80, 51, 36, -5, -3, -1, 66, 20, 65, -3, -1, 4, + 64, -1, 35, 50, -9, -7, -3, -1, 19, 49, -1, 3, 48, 34, -1, + 2, 32, -1, 18, 33, 17, -3, -1, 1, 16, 0 +}; + +static short tab9[] = +{ + -63, -53, -41, -29, -19, -11, -5, -3, -1, 85, 69, 53, -1, 83, -1, + 84, 5, -3, -1, 68, 37, -1, 82, 21, -3, -1, 81, 52, -1, 67, + -1, 80, 4, -7, -3, -1, 36, 66, -1, 51, 64, -1, 20, 65, -5, + -3, -1, 35, 50, 19, -1, 49, -1, 3, 48, -5, -3, -1, 34, 2, + 18, -1, 33, 32, -3, -1, 17, 1, -1, 16, 0 +}; + +static short tab10[] = +{ +-125,-121,-111, -83, -55, -35, -21, -13, -7, -3, -1, 119, 103, -1, 118, + 87, -3, -1, 117, 102, 71, -3, -1, 116, 86, -1, 101, 55, -9, -3, + -1, 115, 70, -3, -1, 85, 84, 99, -1, 39, 114, -11, -5, -3, -1, + 100, 7, 112, -1, 98, -1, 69, 53, -5, -1, 6, -1, 83, 68, 23, + -17, -5, -1, 113, -1, 54, 38, -5, -3, -1, 37, 82, 21, -1, 81, + -1, 52, 67, -3, -1, 22, 97, -1, 96, -1, 5, 80, -19, -11, -7, + -3, -1, 36, 66, -1, 51, 4, -1, 20, 65, -3, -1, 64, 35, -1, + 50, 3, -3, -1, 19, 49, -1, 48, 34, -7, -3, -1, 18, 33, -1, + 2, 32, 17, -1, 1, 16, 0 +}; + +static short tab11[] = +{ +-121,-113, -89, -59, -43, -27, -17, -7, -3, -1, 119, 103, -1, 118, 117, + -3, -1, 102, 71, -1, 116, -1, 87, 85, -5, -3, -1, 86, 101, 55, + -1, 115, 70, -9, -7, -3, -1, 69, 84, -1, 53, 83, 39, -1, 114, + -1, 100, 7, -5, -1, 113, -1, 23, 112, -3, -1, 54, 99, -1, 96, + -1, 68, 37, -13, -7, -5, -3, -1, 82, 5, 21, 98, -3, -1, 38, + 6, 22, -5, -1, 97, -1, 81, 52, -5, -1, 80, -1, 67, 51, -1, + 36, 66, -15, -11, -7, -3, -1, 20, 65, -1, 4, 64, -1, 35, 50, + -1, 19, 49, -5, -3, -1, 3, 48, 34, 33, -5, -1, 18, -1, 2, + 32, 17, -3, -1, 1, 16, 0 +}; + +static short tab12[] = +{ +-115, -99, -73, -45, -27, -17, -9, -5, -3, -1, 119, 103, 118, -1, 87, + 117, -3, -1, 102, 71, -1, 116, 101, -3, -1, 86, 55, -3, -1, 115, + 85, 39, -7, -3, -1, 114, 70, -1, 100, 23, -5, -1, 113, -1, 7, + 112, -1, 54, 99, -13, -9, -3, -1, 69, 84, -1, 68, -1, 6, 5, + -1, 38, 98, -5, -1, 97, -1, 22, 96, -3, -1, 53, 83, -1, 37, + 82, -17, -7, -3, -1, 21, 81, -1, 52, 67, -5, -3, -1, 80, 4, + 36, -1, 66, 20, -3, -1, 51, 65, -1, 35, 50, -11, -7, -5, -3, + -1, 64, 3, 48, 19, -1, 49, 34, -1, 18, 33, -7, -5, -3, -1, + 2, 32, 0, 17, -1, 1, 16 +}; + +static short tab13[] = +{ +-509,-503,-475,-405,-333,-265,-205,-153,-115, -83, -53, -35, -21, -13, -9, + -7, -5, -3, -1, 254, 252, 253, 237, 255, -1, 239, 223, -3, -1, 238, + 207, -1, 222, 191, -9, -3, -1, 251, 206, -1, 220, -1, 175, 233, -1, + 236, 221, -9, -5, -3, -1, 250, 205, 190, -1, 235, 159, -3, -1, 249, + 234, -1, 189, 219, -17, -9, -3, -1, 143, 248, -1, 204, -1, 174, 158, + -5, -1, 142, -1, 127, 126, 247, -5, -1, 218, -1, 173, 188, -3, -1, + 203, 246, 111, -15, -7, -3, -1, 232, 95, -1, 157, 217, -3, -1, 245, + 231, -1, 172, 187, -9, -3, -1, 79, 244, -3, -1, 202, 230, 243, -1, + 63, -1, 141, 216, -21, -9, -3, -1, 47, 242, -3, -1, 110, 156, 15, + -5, -3, -1, 201, 94, 171, -3, -1, 125, 215, 78, -11, -5, -3, -1, + 200, 214, 62, -1, 185, -1, 155, 170, -1, 31, 241, -23, -13, -5, -1, + 240, -1, 186, 229, -3, -1, 228, 140, -1, 109, 227, -5, -1, 226, -1, + 46, 14, -1, 30, 225, -15, -7, -3, -1, 224, 93, -1, 213, 124, -3, + -1, 199, 77, -1, 139, 184, -7, -3, -1, 212, 154, -1, 169, 108, -1, + 198, 61, -37, -21, -9, -5, -3, -1, 211, 123, 45, -1, 210, 29, -5, + -1, 183, -1, 92, 197, -3, -1, 153, 122, 195, -7, -5, -3, -1, 167, + 151, 75, 209, -3, -1, 13, 208, -1, 138, 168, -11, -7, -3, -1, 76, + 196, -1, 107, 182, -1, 60, 44, -3, -1, 194, 91, -3, -1, 181, 137, + 28, -43, -23, -11, -5, -1, 193, -1, 152, 12, -1, 192, -1, 180, 106, + -5, -3, -1, 166, 121, 59, -1, 179, -1, 136, 90, -11, -5, -1, 43, + -1, 165, 105, -1, 164, -1, 120, 135, -5, -1, 148, -1, 119, 118, 178, + -11, -3, -1, 27, 177, -3, -1, 11, 176, -1, 150, 74, -7, -3, -1, + 58, 163, -1, 89, 149, -1, 42, 162, -47, -23, -9, -3, -1, 26, 161, + -3, -1, 10, 104, 160, -5, -3, -1, 134, 73, 147, -3, -1, 57, 88, + -1, 133, 103, -9, -3, -1, 41, 146, -3, -1, 87, 117, 56, -5, -1, + 131, -1, 102, 71, -3, -1, 116, 86, -1, 101, 115, -11, -3, -1, 25, + 145, -3, -1, 9, 144, -1, 72, 132, -7, -5, -1, 114, -1, 70, 100, + 40, -1, 130, 24, -41, -27, -11, -5, -3, -1, 55, 39, 23, -1, 113, + -1, 85, 7, -7, -3, -1, 112, 54, -1, 99, 69, -3, -1, 84, 38, + -1, 98, 53, -5, -1, 129, -1, 8, 128, -3, -1, 22, 97, -1, 6, + 96, -13, -9, -5, -3, -1, 83, 68, 37, -1, 82, 5, -1, 21, 81, + -7, -3, -1, 52, 67, -1, 80, 36, -3, -1, 66, 51, 20, -19, -11, + -5, -1, 65, -1, 4, 64, -3, -1, 35, 50, 19, -3, -1, 49, 3, + -1, 48, 34, -3, -1, 18, 33, -1, 2, 32, -3, -1, 17, 1, 16, + 0 +}; + +static short tab15[] = +{ +-495,-445,-355,-263,-183,-115, -77, -43, -27, -13, -7, -3, -1, 255, 239, + -1, 254, 223, -1, 238, -1, 253, 207, -7, -3, -1, 252, 222, -1, 237, + 191, -1, 251, -1, 206, 236, -7, -3, -1, 221, 175, -1, 250, 190, -3, + -1, 235, 205, -1, 220, 159, -15, -7, -3, -1, 249, 234, -1, 189, 219, + -3, -1, 143, 248, -1, 204, 158, -7, -3, -1, 233, 127, -1, 247, 173, + -3, -1, 218, 188, -1, 111, -1, 174, 15, -19, -11, -3, -1, 203, 246, + -3, -1, 142, 232, -1, 95, 157, -3, -1, 245, 126, -1, 231, 172, -9, + -3, -1, 202, 187, -3, -1, 217, 141, 79, -3, -1, 244, 63, -1, 243, + 216, -33, -17, -9, -3, -1, 230, 47, -1, 242, -1, 110, 240, -3, -1, + 31, 241, -1, 156, 201, -7, -3, -1, 94, 171, -1, 186, 229, -3, -1, + 125, 215, -1, 78, 228, -15, -7, -3, -1, 140, 200, -1, 62, 109, -3, + -1, 214, 227, -1, 155, 185, -7, -3, -1, 46, 170, -1, 226, 30, -5, + -1, 225, -1, 14, 224, -1, 93, 213, -45, -25, -13, -7, -3, -1, 124, + 199, -1, 77, 139, -1, 212, -1, 184, 154, -7, -3, -1, 169, 108, -1, + 198, 61, -1, 211, 210, -9, -5, -3, -1, 45, 13, 29, -1, 123, 183, + -5, -1, 209, -1, 92, 208, -1, 197, 138, -17, -7, -3, -1, 168, 76, + -1, 196, 107, -5, -1, 182, -1, 153, 12, -1, 60, 195, -9, -3, -1, + 122, 167, -1, 166, -1, 192, 11, -1, 194, -1, 44, 91, -55, -29, -15, + -7, -3, -1, 181, 28, -1, 137, 152, -3, -1, 193, 75, -1, 180, 106, + -5, -3, -1, 59, 121, 179, -3, -1, 151, 136, -1, 43, 90, -11, -5, + -1, 178, -1, 165, 27, -1, 177, -1, 176, 105, -7, -3, -1, 150, 74, + -1, 164, 120, -3, -1, 135, 58, 163, -17, -7, -3, -1, 89, 149, -1, + 42, 162, -3, -1, 26, 161, -3, -1, 10, 160, 104, -7, -3, -1, 134, + 73, -1, 148, 57, -5, -1, 147, -1, 119, 9, -1, 88, 133, -53, -29, + -13, -7, -3, -1, 41, 103, -1, 118, 146, -1, 145, -1, 25, 144, -7, + -3, -1, 72, 132, -1, 87, 117, -3, -1, 56, 131, -1, 102, 71, -7, + -3, -1, 40, 130, -1, 24, 129, -7, -3, -1, 116, 8, -1, 128, 86, + -3, -1, 101, 55, -1, 115, 70, -17, -7, -3, -1, 39, 114, -1, 100, + 23, -3, -1, 85, 113, -3, -1, 7, 112, 54, -7, -3, -1, 99, 69, + -1, 84, 38, -3, -1, 98, 22, -3, -1, 6, 96, 53, -33, -19, -9, + -5, -1, 97, -1, 83, 68, -1, 37, 82, -3, -1, 21, 81, -3, -1, + 5, 80, 52, -7, -3, -1, 67, 36, -1, 66, 51, -1, 65, -1, 20, + 4, -9, -3, -1, 35, 50, -3, -1, 64, 3, 19, -3, -1, 49, 48, + 34, -9, -7, -3, -1, 18, 33, -1, 2, 32, 17, -3, -1, 1, 16, + 0 +}; + +static short tab16[] = +{ +-509,-503,-461,-323,-103, -37, -27, -15, -7, -3, -1, 239, 254, -1, 223, + 253, -3, -1, 207, 252, -1, 191, 251, -5, -1, 175, -1, 250, 159, -3, + -1, 249, 248, 143, -7, -3, -1, 127, 247, -1, 111, 246, 255, -9, -5, + -3, -1, 95, 245, 79, -1, 244, 243, -53, -1, 240, -1, 63, -29, -19, + -13, -7, -5, -1, 206, -1, 236, 221, 222, -1, 233, -1, 234, 217, -1, + 238, -1, 237, 235, -3, -1, 190, 205, -3, -1, 220, 219, 174, -11, -5, + -1, 204, -1, 173, 218, -3, -1, 126, 172, 202, -5, -3, -1, 201, 125, + 94, 189, 242, -93, -5, -3, -1, 47, 15, 31, -1, 241, -49, -25, -13, + -5, -1, 158, -1, 188, 203, -3, -1, 142, 232, -1, 157, 231, -7, -3, + -1, 187, 141, -1, 216, 110, -1, 230, 156, -13, -7, -3, -1, 171, 186, + -1, 229, 215, -1, 78, -1, 228, 140, -3, -1, 200, 62, -1, 109, -1, + 214, 155, -19, -11, -5, -3, -1, 185, 170, 225, -1, 212, -1, 184, 169, + -5, -1, 123, -1, 183, 208, 227, -7, -3, -1, 14, 224, -1, 93, 213, + -3, -1, 124, 199, -1, 77, 139, -75, -45, -27, -13, -7, -3, -1, 154, + 108, -1, 198, 61, -3, -1, 92, 197, 13, -7, -3, -1, 138, 168, -1, + 153, 76, -3, -1, 182, 122, 60, -11, -5, -3, -1, 91, 137, 28, -1, + 192, -1, 152, 121, -1, 226, -1, 46, 30, -15, -7, -3, -1, 211, 45, + -1, 210, 209, -5, -1, 59, -1, 151, 136, 29, -7, -3, -1, 196, 107, + -1, 195, 167, -1, 44, -1, 194, 181, -23, -13, -7, -3, -1, 193, 12, + -1, 75, 180, -3, -1, 106, 166, 179, -5, -3, -1, 90, 165, 43, -1, + 178, 27, -13, -5, -1, 177, -1, 11, 176, -3, -1, 105, 150, -1, 74, + 164, -5, -3, -1, 120, 135, 163, -3, -1, 58, 89, 42, -97, -57, -33, + -19, -11, -5, -3, -1, 149, 104, 161, -3, -1, 134, 119, 148, -5, -3, + -1, 73, 87, 103, 162, -5, -1, 26, -1, 10, 160, -3, -1, 57, 147, + -1, 88, 133, -9, -3, -1, 41, 146, -3, -1, 118, 9, 25, -5, -1, + 145, -1, 144, 72, -3, -1, 132, 117, -1, 56, 131, -21, -11, -5, -3, + -1, 102, 40, 130, -3, -1, 71, 116, 24, -3, -1, 129, 128, -3, -1, + 8, 86, 55, -9, -5, -1, 115, -1, 101, 70, -1, 39, 114, -5, -3, + -1, 100, 85, 7, 23, -23, -13, -5, -1, 113, -1, 112, 54, -3, -1, + 99, 69, -1, 84, 38, -3, -1, 98, 22, -1, 97, -1, 6, 96, -9, + -5, -1, 83, -1, 53, 68, -1, 37, 82, -1, 81, -1, 21, 5, -33, + -23, -13, -7, -3, -1, 52, 67, -1, 80, 36, -3, -1, 66, 51, 20, + -5, -1, 65, -1, 4, 64, -1, 35, 50, -3, -1, 19, 49, -3, -1, + 3, 48, 34, -3, -1, 18, 33, -1, 2, 32, -3, -1, 17, 1, 16, + 0 +}; + +static short tab24[] = +{ +-451,-117, -43, -25, -15, -7, -3, -1, 239, 254, -1, 223, 253, -3, -1, + 207, 252, -1, 191, 251, -5, -1, 250, -1, 175, 159, -1, 249, 248, -9, + -5, -3, -1, 143, 127, 247, -1, 111, 246, -3, -1, 95, 245, -1, 79, + 244, -71, -7, -3, -1, 63, 243, -1, 47, 242, -5, -1, 241, -1, 31, + 240, -25, -9, -1, 15, -3, -1, 238, 222, -1, 237, 206, -7, -3, -1, + 236, 221, -1, 190, 235, -3, -1, 205, 220, -1, 174, 234, -15, -7, -3, + -1, 189, 219, -1, 204, 158, -3, -1, 233, 173, -1, 218, 188, -7, -3, + -1, 203, 142, -1, 232, 157, -3, -1, 217, 126, -1, 231, 172, 255,-235, +-143, -77, -45, -25, -15, -7, -3, -1, 202, 187, -1, 141, 216, -5, -3, + -1, 14, 224, 13, 230, -5, -3, -1, 110, 156, 201, -1, 94, 186, -9, + -5, -1, 229, -1, 171, 125, -1, 215, 228, -3, -1, 140, 200, -3, -1, + 78, 46, 62, -15, -7, -3, -1, 109, 214, -1, 227, 155, -3, -1, 185, + 170, -1, 226, 30, -7, -3, -1, 225, 93, -1, 213, 124, -3, -1, 199, + 77, -1, 139, 184, -31, -15, -7, -3, -1, 212, 154, -1, 169, 108, -3, + -1, 198, 61, -1, 211, 45, -7, -3, -1, 210, 29, -1, 123, 183, -3, + -1, 209, 92, -1, 197, 138, -17, -7, -3, -1, 168, 153, -1, 76, 196, + -3, -1, 107, 182, -3, -1, 208, 12, 60, -7, -3, -1, 195, 122, -1, + 167, 44, -3, -1, 194, 91, -1, 181, 28, -57, -35, -19, -7, -3, -1, + 137, 152, -1, 193, 75, -5, -3, -1, 192, 11, 59, -3, -1, 176, 10, + 26, -5, -1, 180, -1, 106, 166, -3, -1, 121, 151, -3, -1, 160, 9, + 144, -9, -3, -1, 179, 136, -3, -1, 43, 90, 178, -7, -3, -1, 165, + 27, -1, 177, 105, -1, 150, 164, -17, -9, -5, -3, -1, 74, 120, 135, + -1, 58, 163, -3, -1, 89, 149, -1, 42, 162, -7, -3, -1, 161, 104, + -1, 134, 119, -3, -1, 73, 148, -1, 57, 147, -63, -31, -15, -7, -3, + -1, 88, 133, -1, 41, 103, -3, -1, 118, 146, -1, 25, 145, -7, -3, + -1, 72, 132, -1, 87, 117, -3, -1, 56, 131, -1, 102, 40, -17, -7, + -3, -1, 130, 24, -1, 71, 116, -5, -1, 129, -1, 8, 128, -1, 86, + 101, -7, -5, -1, 23, -1, 7, 112, 115, -3, -1, 55, 39, 114, -15, + -7, -3, -1, 70, 100, -1, 85, 113, -3, -1, 54, 99, -1, 69, 84, + -7, -3, -1, 38, 98, -1, 22, 97, -5, -3, -1, 6, 96, 53, -1, + 83, 68, -51, -37, -23, -15, -9, -3, -1, 37, 82, -1, 21, -1, 5, + 80, -1, 81, -1, 52, 67, -3, -1, 36, 66, -1, 51, 20, -9, -5, + -1, 65, -1, 4, 64, -1, 35, 50, -1, 19, 49, -7, -5, -3, -1, + 3, 48, 34, 18, -1, 33, -1, 2, 32, -3, -1, 17, 1, -1, 16, + 0 +}; + +static short tab_c0[] = +{ + -29, -21, -13, -7, -3, -1, 11, 15, -1, 13, 14, -3, -1, 7, 5, + 9, -3, -1, 6, 3, -1, 10, 12, -3, -1, 2, 1, -1, 4, 8, + 0 +}; + +static short tab_c1[] = +{ + -15, -7, -3, -1, 15, 14, -1, 13, 12, -3, -1, 11, 10, -1, 9, + 8, -7, -3, -1, 7, 6, -1, 5, 4, -3, -1, 3, 2, -1, 1, + 0 +}; + + + +static struct newhuff ht[] = +{ + { /* 0 */ 0 , tab0 } , + { /* 2 */ 0 , tab1 } , + { /* 3 */ 0 , tab2 } , + { /* 3 */ 0 , tab3 } , + { /* 0 */ 0 , tab0 } , + { /* 4 */ 0 , tab5 } , + { /* 4 */ 0 , tab6 } , + { /* 6 */ 0 , tab7 } , + { /* 6 */ 0 , tab8 } , + { /* 6 */ 0 , tab9 } , + { /* 8 */ 0 , tab10 } , + { /* 8 */ 0 , tab11 } , + { /* 8 */ 0 , tab12 } , + { /* 16 */ 0 , tab13 } , + { /* 0 */ 0 , tab0 } , + { /* 16 */ 0 , tab15 } , + + { /* 16 */ 1 , tab16 } , + { /* 16 */ 2 , tab16 } , + { /* 16 */ 3 , tab16 } , + { /* 16 */ 4 , tab16 } , + { /* 16 */ 6 , tab16 } , + { /* 16 */ 8 , tab16 } , + { /* 16 */ 10, tab16 } , + { /* 16 */ 13, tab16 } , + { /* 16 */ 4 , tab24 } , + { /* 16 */ 5 , tab24 } , + { /* 16 */ 6 , tab24 } , + { /* 16 */ 7 , tab24 } , + { /* 16 */ 8 , tab24 } , + { /* 16 */ 9 , tab24 } , + { /* 16 */ 11, tab24 } , + { /* 16 */ 13, tab24 } +}; + +static struct newhuff htc[] = +{ + { /* 1 , 1 , */ 0 , tab_c0 } , + { /* 1 , 1 , */ 0 , tab_c1 } +}; + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/interface.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,229 @@ + +#include <stdlib.h> +#include <stdio.h> + +#include "mpg123_sdlsound.h" +#include "mpglib_sdlsound.h" + +/* Global mp .. it's a hack */ +struct mpstr *gmp; + + +BOOL InitMP3(struct mpstr *mp) +{ + static int init = 0; + + memset(mp,0,sizeof(struct mpstr)); + + mp->framesize = 0; + mp->fsizeold = -1; + mp->bsize = 0; + mp->head = mp->tail = NULL; + mp->fr.single = -1; + mp->bsnum = 0; + mp->synth_bo = 1; + + if(!init) { + init = 1; + make_decode_tables(32767); + init_layer2(); + init_layer3(SBLIMIT); + } + + return !0; +} + +void ExitMP3(struct mpstr *mp) +{ + struct buf *b,*bn; + + b = mp->tail; + while(b) { + free(b->pnt); + bn = b->next; + free(b); + b = bn; + } +} + +static struct buf *addbuf(struct mpstr *mp,char *buf,int size) +{ + struct buf *nbuf; + + nbuf = malloc( sizeof(struct buf) ); + if(!nbuf) { + fprintf(stderr,"Out of memory!\n"); + return NULL; + } + nbuf->pnt = malloc(size); + if(!nbuf->pnt) { + free(nbuf); + return NULL; + } + nbuf->size = size; + memcpy(nbuf->pnt,buf,size); + nbuf->next = NULL; + nbuf->prev = mp->head; + nbuf->pos = 0; + + if(!mp->tail) { + mp->tail = nbuf; + } + else { + mp->head->next = nbuf; + } + + mp->head = nbuf; + mp->bsize += size; + + return nbuf; +} + +static void remove_buf(struct mpstr *mp) +{ + struct buf *buf = mp->tail; + + mp->tail = buf->next; + if(mp->tail) + mp->tail->prev = NULL; + else { + mp->tail = mp->head = NULL; + } + + free(buf->pnt); + free(buf); + +} + +static int read_buf_byte(struct mpstr *mp) +{ + unsigned int b; + + int pos; + + pos = mp->tail->pos; + while(pos >= mp->tail->size) { + remove_buf(mp); + pos = mp->tail->pos; + if(!mp->tail) { + fprintf(stderr,"Fatal error!\n"); + exit(1); + } + } + + b = mp->tail->pnt[pos]; + mp->bsize--; + mp->tail->pos++; + + + return b; +} + +static void read_head(struct mpstr *mp) +{ + unsigned long head; + + head = read_buf_byte(mp); + head <<= 8; + head |= read_buf_byte(mp); + head <<= 8; + head |= read_buf_byte(mp); + head <<= 8; + head |= read_buf_byte(mp); + + mp->header = head; +} + +int decodeMP3(struct mpstr *mp,char *in,int isize,char *out, + int osize,int *done) +{ + int len; + + gmp = mp; + + if(osize < 4608) { + fprintf(stderr,"To less out space\n"); + return MP3_ERR; + } + + if(in) { + if(addbuf(mp,in,isize) == NULL) { + return MP3_ERR; + } + } + + /* First decode header */ + if(mp->framesize == 0) { + if(mp->bsize < 4) { + return MP3_NEED_MORE; + } + read_head(mp); + decode_header(&mp->fr,mp->header); + mp->framesize = mp->fr.framesize; + } + + if(mp->fr.framesize > mp->bsize) + return MP3_NEED_MORE; + + wordpointer = mp->bsspace[mp->bsnum] + 512; + mp->bsnum = (mp->bsnum + 1) & 0x1; + bitindex = 0; + + len = 0; + while(len < mp->framesize) { + int nlen; + int blen = mp->tail->size - mp->tail->pos; + if( (mp->framesize - len) <= blen) { + nlen = mp->framesize-len; + } + else { + nlen = blen; + } + memcpy(wordpointer+len,mp->tail->pnt+mp->tail->pos,nlen); + len += nlen; + mp->tail->pos += nlen; + mp->bsize -= nlen; + if(mp->tail->pos == mp->tail->size) { + remove_buf(mp); + } + } + + *done = 0; + if(mp->fr.error_protection) + getbits(16); + switch(mp->fr.lay) { + case 1: + do_layer1(&mp->fr,(unsigned char *) out,done); + break; + case 2: + do_layer2(&mp->fr,(unsigned char *) out,done); + break; + case 3: + do_layer3(&mp->fr,(unsigned char *) out,done); + break; + } + + mp->fsizeold = mp->framesize; + mp->framesize = 0; + + return MP3_OK; +} + +int set_pointer(long backstep) +{ + unsigned char *bsbufold; + if(gmp->fsizeold < 0 && backstep > 0) { + fprintf(stderr,"Can't step back %ld!\n",backstep); + return MP3_ERR; + } + bsbufold = gmp->bsspace[gmp->bsnum] + 512; + wordpointer -= backstep; + if (backstep) + memcpy(wordpointer,bsbufold+gmp->fsizeold-backstep,backstep); + bitindex = 0; + return MP3_OK; +} + + + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/l2tables.h Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,160 @@ +/* + * Layer 2 Alloc tables .. + * most other tables are calculated on program start (which is (of course) + * not ISO-conform) .. + * Layer-3 huffman table is in huffman.h + */ + +struct al_table +{ + short bits; + short d; +}; + +struct al_table alloc_0[] = { + {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511}, + {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767}, + {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511}, + {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767}, + {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511}, + {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767} }; + +struct al_table alloc_1[] = { + {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511}, + {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767}, + {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511}, + {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767}, + {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511}, + {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767}, + {2,0},{5,3},{7,5},{16,-32767} }; + +struct al_table alloc_2[] = { + {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255}, + {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383}, + {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255}, + {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63} }; + +struct al_table alloc_3[] = { + {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255}, + {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383}, + {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255}, + {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63} }; + +struct al_table alloc_4[] = { + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191}, + {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127}, + {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9}, + {2,0},{5,3},{7,5},{10,9} }; +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/layer1.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,147 @@ +/* + * Mpeg Layer-1 audio decoder + * -------------------------- + * copyright (c) 1995 by Michael Hipp, All rights reserved. See also 'README' + * near unoptimzed ... + * + * may have a few bugs after last optimization ... + * + */ + +#include "mpg123_sdlsound.h" + +void I_step_one(unsigned int balloc[], unsigned int scale_index[2][SBLIMIT],struct frame *fr) +{ + unsigned int *ba=balloc; + unsigned int *sca = (unsigned int *) scale_index; + + if(fr->stereo) { + int i; + int jsbound = fr->jsbound; + for (i=0;i<jsbound;i++) { + *ba++ = getbits(4); + *ba++ = getbits(4); + } + for (i=jsbound;i<SBLIMIT;i++) + *ba++ = getbits(4); + + ba = balloc; + + for (i=0;i<jsbound;i++) { + if ((*ba++)) + *sca++ = getbits(6); + if ((*ba++)) + *sca++ = getbits(6); + } + for (i=jsbound;i<SBLIMIT;i++) + if ((*ba++)) { + *sca++ = getbits(6); + *sca++ = getbits(6); + } + } + else { + int i; + for (i=0;i<SBLIMIT;i++) + *ba++ = getbits(4); + ba = balloc; + for (i=0;i<SBLIMIT;i++) + if ((*ba++)) + *sca++ = getbits(6); + } +} + +void I_step_two(real fraction[2][SBLIMIT],unsigned int balloc[2*SBLIMIT], + unsigned int scale_index[2][SBLIMIT],struct frame *fr) +{ + int i,n; + int smpb[2*SBLIMIT]; /* values: 0-65535 */ + int *sample; + register unsigned int *ba; + register unsigned int *sca = (unsigned int *) scale_index; + + if(fr->stereo) { + int jsbound = fr->jsbound; + register real *f0 = fraction[0]; + register real *f1 = fraction[1]; + ba = balloc; + for (sample=smpb,i=0;i<jsbound;i++) { + if ((n = *ba++)) + *sample++ = getbits(n+1); + if ((n = *ba++)) + *sample++ = getbits(n+1); + } + for (i=jsbound;i<SBLIMIT;i++) + if ((n = *ba++)) + *sample++ = getbits(n+1); + + ba = balloc; + for (sample=smpb,i=0;i<jsbound;i++) { + if((n=*ba++)) + *f0++ = (real) ( ((-1)<<n) + (*sample++) + 1) * muls[n+1][*sca++]; + else + *f0++ = 0.0; + if((n=*ba++)) + *f1++ = (real) ( ((-1)<<n) + (*sample++) + 1) * muls[n+1][*sca++]; + else + *f1++ = 0.0; + } + for (i=jsbound;i<SBLIMIT;i++) { + if ((n=*ba++)) { + real samp = ( ((-1)<<n) + (*sample++) + 1); + *f0++ = samp * muls[n+1][*sca++]; + *f1++ = samp * muls[n+1][*sca++]; + } + else + *f0++ = *f1++ = 0.0; + } + } + else { + register real *f0 = fraction[0]; + ba = balloc; + for (sample=smpb,i=0;i<SBLIMIT;i++) + if ((n = *ba++)) + *sample++ = getbits(n+1); + ba = balloc; + for (sample=smpb,i=0;i<SBLIMIT;i++) { + if((n=*ba++)) + *f0++ = (real) ( ((-1)<<n) + (*sample++) + 1) * muls[n+1][*sca++]; + else + *f0++ = 0.0; + } + } +} + +int do_layer1(struct frame *fr,unsigned char *pcm_sample,int *pcm_point) +{ + int clip=0; + int i,stereo = fr->stereo; + unsigned int balloc[2*SBLIMIT]; + unsigned int scale_index[2][SBLIMIT]; + real fraction[2][SBLIMIT]; + int single = fr->single; + + fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ? (fr->mode_ext<<2)+4 : 32; + + if(stereo == 1 || single == 3) + single = 0; + + I_step_one(balloc,scale_index,fr); + + for (i=0;i<SCALE_BLOCK;i++) + { + I_step_two(fraction,balloc,scale_index,fr); + + if(single >= 0) { + clip += synth_1to1_mono( (real*)fraction[single],pcm_sample,pcm_point); + } + else { + int p1 = *pcm_point; + clip += synth_1to1( (real*)fraction[0],0,pcm_sample,&p1); + clip += synth_1to1( (real*)fraction[1],1,pcm_sample,pcm_point); + } + } + + return clip; +} + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/layer2.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,288 @@ +/* + * Mpeg Layer-2 audio decoder + * -------------------------- + * copyright (c) 1995 by Michael Hipp, All rights reserved. See also 'README' + * + */ + +#include "mpg123_sdlsound.h" +#include "l2tables.h" + +static int grp_3tab[32 * 3] = { 0, }; /* used: 27 */ +static int grp_5tab[128 * 3] = { 0, }; /* used: 125 */ +static int grp_9tab[1024 * 3] = { 0, }; /* used: 729 */ + +real muls[27][64]; /* also used by layer 1 */ + +void init_layer2(void) +{ + static double mulmul[27] = { + 0.0 , -2.0/3.0 , 2.0/3.0 , + 2.0/7.0 , 2.0/15.0 , 2.0/31.0, 2.0/63.0 , 2.0/127.0 , 2.0/255.0 , + 2.0/511.0 , 2.0/1023.0 , 2.0/2047.0 , 2.0/4095.0 , 2.0/8191.0 , + 2.0/16383.0 , 2.0/32767.0 , 2.0/65535.0 , + -4.0/5.0 , -2.0/5.0 , 2.0/5.0, 4.0/5.0 , + -8.0/9.0 , -4.0/9.0 , -2.0/9.0 , 2.0/9.0 , 4.0/9.0 , 8.0/9.0 }; + static int base[3][9] = { + { 1 , 0, 2 , } , + { 17, 18, 0 , 19, 20 , } , + { 21, 1, 22, 23, 0, 24, 25, 2, 26 } }; + int i,j,k,l,len; + real *table; + static int tablen[3] = { 3 , 5 , 9 }; + static int *itable,*tables[3] = { grp_3tab , grp_5tab , grp_9tab }; + + for(i=0;i<3;i++) + { + itable = tables[i]; + len = tablen[i]; + for(j=0;j<len;j++) + for(k=0;k<len;k++) + for(l=0;l<len;l++) + { + *itable++ = base[i][l]; + *itable++ = base[i][k]; + *itable++ = base[i][j]; + } + } + + for(k=0;k<27;k++) + { + double m=mulmul[k]; + table = muls[k]; + for(j=3,i=0;i<63;i++,j--) + *table++ = m * pow(2.0,(double) j / 3.0); + *table++ = 0.0; + } +} + + +void II_step_one(unsigned int *bit_alloc,int *scale,struct frame *fr) +{ + int stereo = fr->stereo-1; + int sblimit = fr->II_sblimit; + int jsbound = fr->jsbound; + int sblimit2 = fr->II_sblimit<<stereo; + struct al_table *alloc1 = fr->alloc; + int i; + static unsigned int scfsi_buf[64]; + unsigned int *scfsi,*bita; + int sc,step; + + bita = bit_alloc; + if(stereo) + { + for (i=jsbound;i;i--,alloc1+=(1<<step)) + { + *bita++ = (char) getbits(step=alloc1->bits); + *bita++ = (char) getbits(step); + } + for (i=sblimit-jsbound;i;i--,alloc1+=(1<<step)) + { + bita[0] = (char) getbits(step=alloc1->bits); + bita[1] = bita[0]; + bita+=2; + } + bita = bit_alloc; + scfsi=scfsi_buf; + for (i=sblimit2;i;i--) + if (*bita++) + *scfsi++ = (char) getbits_fast(2); + } + else /* mono */ + { + for (i=sblimit;i;i--,alloc1+=(1<<step)) + *bita++ = (char) getbits(step=alloc1->bits); + bita = bit_alloc; + scfsi=scfsi_buf; + for (i=sblimit;i;i--) + if (*bita++) + *scfsi++ = (char) getbits_fast(2); + } + + bita = bit_alloc; + scfsi=scfsi_buf; + for (i=sblimit2;i;i--) + if (*bita++) + switch (*scfsi++) + { + case 0: + *scale++ = getbits_fast(6); + *scale++ = getbits_fast(6); + *scale++ = getbits_fast(6); + break; + case 1 : + *scale++ = sc = getbits_fast(6); + *scale++ = sc; + *scale++ = getbits_fast(6); + break; + case 2: + *scale++ = sc = getbits_fast(6); + *scale++ = sc; + *scale++ = sc; + break; + default: /* case 3 */ + *scale++ = getbits_fast(6); + *scale++ = sc = getbits_fast(6); + *scale++ = sc; + break; + } + +} + +void II_step_two(unsigned int *bit_alloc,real fraction[2][4][SBLIMIT],int *scale,struct frame *fr,int x1) +{ + int i,j,k,ba; + int stereo = fr->stereo; + int sblimit = fr->II_sblimit; + int jsbound = fr->jsbound; + struct al_table *alloc2,*alloc1 = fr->alloc; + unsigned int *bita=bit_alloc; + int d1,step; + + for (i=0;i<jsbound;i++,alloc1+=(1<<step)) + { + step = alloc1->bits; + for (j=0;j<stereo;j++) + { + if ( (ba=*bita++) ) + { + k=(alloc2 = alloc1+ba)->bits; + if( (d1=alloc2->d) < 0) + { + real cm=muls[k][scale[x1]]; + fraction[j][0][i] = ((real) ((int)getbits(k) + d1)) * cm; + fraction[j][1][i] = ((real) ((int)getbits(k) + d1)) * cm; + fraction[j][2][i] = ((real) ((int)getbits(k) + d1)) * cm; + } + else + { + static int *table[] = { 0,0,0,grp_3tab,0,grp_5tab,0,0,0,grp_9tab }; + unsigned int idx,*tab,m=scale[x1]; + idx = (unsigned int) getbits(k); + tab = (unsigned int *) (table[d1] + idx + idx + idx); + fraction[j][0][i] = muls[*tab++][m]; + fraction[j][1][i] = muls[*tab++][m]; + fraction[j][2][i] = muls[*tab][m]; + } + scale+=3; + } + else + fraction[j][0][i] = fraction[j][1][i] = fraction[j][2][i] = 0.0; + } + } + + for (i=jsbound;i<sblimit;i++,alloc1+=(1<<step)) + { + step = alloc1->bits; + bita++; /* channel 1 and channel 2 bitalloc are the same */ + if ( (ba=*bita++) ) + { + k=(alloc2 = alloc1+ba)->bits; + if( (d1=alloc2->d) < 0) + { + real cm; + cm=muls[k][scale[x1+3]]; + fraction[1][0][i] = (fraction[0][0][i] = (real) ((int)getbits(k) + d1) ) * cm; + fraction[1][1][i] = (fraction[0][1][i] = (real) ((int)getbits(k) + d1) ) * cm; + fraction[1][2][i] = (fraction[0][2][i] = (real) ((int)getbits(k) + d1) ) * cm; + cm=muls[k][scale[x1]]; + fraction[0][0][i] *= cm; fraction[0][1][i] *= cm; fraction[0][2][i] *= cm; + } + else + { + static int *table[] = { 0,0,0,grp_3tab,0,grp_5tab,0,0,0,grp_9tab }; + unsigned int idx,*tab,m1,m2; + m1 = scale[x1]; m2 = scale[x1+3]; + idx = (unsigned int) getbits(k); + tab = (unsigned int *) (table[d1] + idx + idx + idx); + fraction[0][0][i] = muls[*tab][m1]; fraction[1][0][i] = muls[*tab++][m2]; + fraction[0][1][i] = muls[*tab][m1]; fraction[1][1][i] = muls[*tab++][m2]; + fraction[0][2][i] = muls[*tab][m1]; fraction[1][2][i] = muls[*tab][m2]; + } + scale+=6; + } + else { + fraction[0][0][i] = fraction[0][1][i] = fraction[0][2][i] = + fraction[1][0][i] = fraction[1][1][i] = fraction[1][2][i] = 0.0; + } +/* + should we use individual scalefac for channel 2 or + is the current way the right one , where we just copy channel 1 to + channel 2 ?? + The current 'strange' thing is, that we throw away the scalefac + values for the second channel ...!! +-> changed .. now we use the scalefac values of channel one !! +*/ + } + + for(i=sblimit;i<SBLIMIT;i++) + for (j=0;j<stereo;j++) + fraction[j][0][i] = fraction[j][1][i] = fraction[j][2][i] = 0.0; + +} + +static void II_select_table(struct frame *fr) +{ + static int translate[3][2][16] = + { { { 0,2,2,2,2,2,2,0,0,0,1,1,1,1,1,0 } , + { 0,2,2,0,0,0,1,1,1,1,1,1,1,1,1,0 } } , + { { 0,2,2,2,2,2,2,0,0,0,0,0,0,0,0,0 } , + { 0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0 } } , + { { 0,3,3,3,3,3,3,0,0,0,1,1,1,1,1,0 } , + { 0,3,3,0,0,0,1,1,1,1,1,1,1,1,1,0 } } }; + + int table,sblim; + static struct al_table *tables[5] = + { alloc_0, alloc_1, alloc_2, alloc_3 , alloc_4 }; + static int sblims[5] = { 27 , 30 , 8, 12 , 30 }; + + if(fr->lsf) + table = 4; + else + table = translate[fr->sampling_frequency][2-fr->stereo][fr->bitrate_index]; + sblim = sblims[table]; + + fr->alloc = tables[table]; + fr->II_sblimit = sblim; +} + +int do_layer2(struct frame *fr,unsigned char *pcm_sample,int *pcm_point) +{ + int clip=0; + int i,j; + int stereo = fr->stereo; + real fraction[2][4][SBLIMIT]; /* pick_table clears unused subbands */ + unsigned int bit_alloc[64]; + int scale[192]; + int single = fr->single; + + II_select_table(fr); + fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ? + (fr->mode_ext<<2)+4 : fr->II_sblimit; + + if(stereo == 1 || single == 3) + single = 0; + + II_step_one(bit_alloc, scale, fr); + + for (i=0;i<SCALE_BLOCK;i++) + { + II_step_two(bit_alloc,fraction,scale,fr,i>>2); + for (j=0;j<3;j++) { + if(single >= 0) { + clip += synth_1to1_mono(fraction[0][j],pcm_sample,pcm_point); + } + else { + int p1 = *pcm_point; + clip += synth_1to1(fraction[0][j],0,pcm_sample,&p1); + clip += synth_1to1(fraction[1][j],1,pcm_sample,pcm_point); + } + + } + } + + return clip; +} + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/layer3.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,2010 @@ +/* + * Mpeg Layer-3 audio decoder + * -------------------------- + * copyright (c) 1995,1996,1997 by Michael Hipp. + * All rights reserved. See also 'README' + */ + +#include <stdlib.h> +#include "mpg123_sdlsound.h" +#include "mpglib_sdlsound.h" +#include "huffman.h" + +extern struct mpstr *gmp; + +#define MPEG1 + + +static real ispow[8207]; +static real aa_ca[8],aa_cs[8]; +static real COS1[12][6]; +static real win[4][36]; +static real win1[4][36]; +static real gainpow2[256+118+4]; +static real COS9[9]; +static real COS6_1,COS6_2; +static real tfcos36[9]; +static real tfcos12[3]; + +struct bandInfoStruct { + short longIdx[23]; + short longDiff[22]; + short shortIdx[14]; + short shortDiff[13]; +}; + +int longLimit[9][23]; +int shortLimit[9][14]; + +struct bandInfoStruct bandInfo[9] = { + +/* MPEG 1.0 */ + { {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576}, + {4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158}, + {0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3}, + {4,4,4,4,6,8,10,12,14,18,22,30,56} } , + + { {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576}, + {4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192}, + {0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3}, + {4,4,4,4,6,6,10,12,14,16,20,26,66} } , + + { {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} , + {4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} , + {0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3} , + {4,4,4,4,6,8,12,16,20,26,34,42,12} } , + +/* MPEG 2.0 */ + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } , + {0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} , + {4,4,4,6,6,8,10,14,18,26,32,42,18 } } , + + { {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576}, + {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } , + {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3} , + {4,4,4,6,8,10,12,14,18,24,32,44,12 } } , + + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 }, + {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3}, + {4,4,4,6,8,10,12,14,18,24,30,40,18 } } , +/* MPEG 2.5 */ + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, + {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, + {4,4,4,6,8,10,12,14,18,24,30,40,18} }, + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, + {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, + {4,4,4,6,8,10,12,14,18,24,30,40,18} }, + { {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576}, + {12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2}, + {0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576}, + {8,8,8,12,16,20,24,28,36,2,2,2,26} } , +}; + +static int mapbuf0[9][152]; +static int mapbuf1[9][156]; +static int mapbuf2[9][44]; +static int *map[9][3]; +static int *mapend[9][3]; + +static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */ +static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */ + +static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16]; +static real pow1_1[2][16],pow2_1[2][16],pow1_2[2][16],pow2_2[2][16]; + +/* + * init tables for layer-3 + */ +void init_layer3(int down_sample_sblimit) +{ + int i,j,k,l; + + for(i=-256;i<118+4;i++) + gainpow2[i+256] = pow((double)2.0,-0.25 * (double) (i+210) ); + + for(i=0;i<8207;i++) + ispow[i] = pow((double)i,(double)4.0/3.0); + + for (i=0;i<8;i++) + { + static double Ci[8]={-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037}; + double sq=sqrt(1.0+Ci[i]*Ci[i]); + aa_cs[i] = 1.0/sq; + aa_ca[i] = Ci[i]/sq; + } + + for(i=0;i<18;i++) + { + win[0][i] = win[1][i] = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+0) +1) ) / cos ( M_PI * (double) (2*(i+0) +19) / 72.0 ); + win[0][i+18] = win[3][i+18] = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+18)+1) ) / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ); + } + for(i=0;i<6;i++) + { + win[1][i+18] = 0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ); + win[3][i+12] = 0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 ); + win[1][i+24] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+13) ) / cos ( M_PI * (double) (2*(i+24)+19) / 72.0 ); + win[1][i+30] = win[3][i] = 0.0; + win[3][i+6 ] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*(i+6 )+19) / 72.0 ); + } + + for(i=0;i<9;i++) + COS9[i] = cos( M_PI / 18.0 * (double) i); + + for(i=0;i<9;i++) + tfcos36[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 ); + for(i=0;i<3;i++) + tfcos12[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 ); + + COS6_1 = cos( M_PI / 6.0 * (double) 1); + COS6_2 = cos( M_PI / 6.0 * (double) 2); + + for(i=0;i<12;i++) + { + win[2][i] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 ); + for(j=0;j<6;j++) + COS1[i][j] = cos( M_PI / 24.0 * (double) ((2*i+7)*(2*j+1)) ); + } + + for(j=0;j<4;j++) { + static int len[4] = { 36,36,12,36 }; + for(i=0;i<len[j];i+=2) + win1[j][i] = + win[j][i]; + for(i=1;i<len[j];i+=2) + win1[j][i] = - win[j][i]; + } + + for(i=0;i<16;i++) + { + double t = tan( (double) i * M_PI / 12.0 ); + tan1_1[i] = t / (1.0+t); + tan2_1[i] = 1.0 / (1.0 + t); + tan1_2[i] = M_SQRT2 * t / (1.0+t); + tan2_2[i] = M_SQRT2 / (1.0 + t); + + for(j=0;j<2;j++) { + double base = pow(2.0,-0.25*(j+1.0)); + double p1=1.0,p2=1.0; + if(i > 0) { + if( i & 1 ) + p1 = pow(base,(i+1.0)*0.5); + else + p2 = pow(base,i*0.5); + } + pow1_1[j][i] = p1; + pow2_1[j][i] = p2; + pow1_2[j][i] = M_SQRT2 * p1; + pow2_2[j][i] = M_SQRT2 * p2; + } + } + + for(j=0;j<9;j++) + { + struct bandInfoStruct *bi = &bandInfo[j]; + int *mp; + int cb,lwin; + short *bdf; + + mp = map[j][0] = mapbuf0[j]; + bdf = bi->longDiff; + for(i=0,cb = 0; cb < 8 ; cb++,i+=*bdf++) { + *mp++ = (*bdf) >> 1; + *mp++ = i; + *mp++ = 3; + *mp++ = cb; + } + bdf = bi->shortDiff+3; + for(cb=3;cb<13;cb++) { + int l = (*bdf++) >> 1; + for(lwin=0;lwin<3;lwin++) { + *mp++ = l; + *mp++ = i + lwin; + *mp++ = lwin; + *mp++ = cb; + } + i += 6*l; + } + mapend[j][0] = mp; + + mp = map[j][1] = mapbuf1[j]; + bdf = bi->shortDiff+0; + for(i=0,cb=0;cb<13;cb++) { + int l = (*bdf++) >> 1; + for(lwin=0;lwin<3;lwin++) { + *mp++ = l; + *mp++ = i + lwin; + *mp++ = lwin; + *mp++ = cb; + } + i += 6*l; + } + mapend[j][1] = mp; + + mp = map[j][2] = mapbuf2[j]; + bdf = bi->longDiff; + for(cb = 0; cb < 22 ; cb++) { + *mp++ = (*bdf++) >> 1; + *mp++ = cb; + } + mapend[j][2] = mp; + + } + + for(j=0;j<9;j++) { + for(i=0;i<23;i++) { + longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1; + if(longLimit[j][i] > (down_sample_sblimit) ) + longLimit[j][i] = down_sample_sblimit; + } + for(i=0;i<14;i++) { + shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1; + if(shortLimit[j][i] > (down_sample_sblimit) ) + shortLimit[j][i] = down_sample_sblimit; + } + } + + for(i=0;i<5;i++) { + for(j=0;j<6;j++) { + for(k=0;k<6;k++) { + int n = k + j * 6 + i * 36; + i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12); + } + } + } + for(i=0;i<4;i++) { + for(j=0;j<4;j++) { + for(k=0;k<4;k++) { + int n = k + j * 4 + i * 16; + i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12); + } + } + } + for(i=0;i<4;i++) { + for(j=0;j<3;j++) { + int n = j + i * 3; + i_slen2[n+244] = i|(j<<3) | (5<<12); + n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15); + } + } + + for(i=0;i<5;i++) { + for(j=0;j<5;j++) { + for(k=0;k<4;k++) { + for(l=0;l<4;l++) { + int n = l + k * 4 + j * 16 + i * 80; + n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12); + } + } + } + } + for(i=0;i<5;i++) { + for(j=0;j<5;j++) { + for(k=0;k<4;k++) { + int n = k + j * 4 + i * 20; + n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12); + } + } + } +} + +/* + * read additional side information + */ +#ifdef MPEG1 +static int III_get_side_info_1(struct III_sideinfo *si,int stereo, + int ms_stereo,long sfreq,int single) +{ + int ch, gr; + int powdiff = (single == 3) ? 4 : 0; + + si->main_data_begin = getbits(9); + if (stereo == 1) + si->private_bits = getbits_fast(5); + else + si->private_bits = getbits_fast(3); + + for (ch=0; ch<stereo; ch++) { + si->ch[ch].gr[0].scfsi = -1; + si->ch[ch].gr[1].scfsi = getbits_fast(4); + } + + for (gr=0; gr<2; gr++) + { + for (ch=0; ch<stereo; ch++) + { + register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]); + + gr_info->part2_3_length = getbits(12); + gr_info->big_values = getbits_fast(9); + if(gr_info->big_values > 288) { + fprintf(stderr,"big_values too large!\n"); + gr_info->big_values = 288; + } + gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff; + if(ms_stereo) + gr_info->pow2gain += 2; + gr_info->scalefac_compress = getbits_fast(4); +/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */ + if(get1bit()) + { + int i; + gr_info->block_type = getbits_fast(2); + gr_info->mixed_block_flag = get1bit(); + gr_info->table_select[0] = getbits_fast(5); + gr_info->table_select[1] = getbits_fast(5); + /* + * table_select[2] not needed, because there is no region2, + * but to satisfy some verifications tools we set it either. + */ + gr_info->table_select[2] = 0; + for(i=0;i<3;i++) + gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3); + + if(gr_info->block_type == 0) { + fprintf(stderr,"Blocktype == 0 and window-switching == 1 not allowed.\n"); + return 0; + } + /* region_count/start parameters are implicit in this case. */ + gr_info->region1start = 36>>1; + gr_info->region2start = 576>>1; + } + else + { + int i,r0c,r1c; + for (i=0; i<3; i++) + gr_info->table_select[i] = getbits_fast(5); + r0c = getbits_fast(4); + r1c = getbits_fast(3); + gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; + gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; + gr_info->block_type = 0; + gr_info->mixed_block_flag = 0; + } + gr_info->preflag = get1bit(); + gr_info->scalefac_scale = get1bit(); + gr_info->count1table_select = get1bit(); + } + } + return !0; +} +#endif + +/* + * Side Info for MPEG 2.0 / LSF + */ +static int III_get_side_info_2(struct III_sideinfo *si,int stereo, + int ms_stereo,long sfreq,int single) +{ + int ch; + int powdiff = (single == 3) ? 4 : 0; + + si->main_data_begin = getbits(8); + if (stereo == 1) + si->private_bits = get1bit(); + else + si->private_bits = getbits_fast(2); + + for (ch=0; ch<stereo; ch++) + { + register struct gr_info_s *gr_info = &(si->ch[ch].gr[0]); + + gr_info->part2_3_length = getbits(12); + gr_info->big_values = getbits_fast(9); + if(gr_info->big_values > 288) { + fprintf(stderr,"big_values too large!\n"); + gr_info->big_values = 288; + } + gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff; + if(ms_stereo) + gr_info->pow2gain += 2; + gr_info->scalefac_compress = getbits(9); +/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */ + if(get1bit()) + { + int i; + gr_info->block_type = getbits_fast(2); + gr_info->mixed_block_flag = get1bit(); + gr_info->table_select[0] = getbits_fast(5); + gr_info->table_select[1] = getbits_fast(5); + /* + * table_select[2] not needed, because there is no region2, + * but to satisfy some verifications tools we set it either. + */ + gr_info->table_select[2] = 0; + for(i=0;i<3;i++) + gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3); + + if(gr_info->block_type == 0) { + fprintf(stderr,"Blocktype == 0 and window-switching == 1 not allowed.\n"); + return 0; + } + /* region_count/start parameters are implicit in this case. */ +/* check this again! */ + if(gr_info->block_type == 2) + gr_info->region1start = 36>>1; + else if(sfreq == 8) +/* check this for 2.5 and sfreq=8 */ + gr_info->region1start = 108>>1; + else + gr_info->region1start = 54>>1; + gr_info->region2start = 576>>1; + } + else + { + int i,r0c,r1c; + for (i=0; i<3; i++) + gr_info->table_select[i] = getbits_fast(5); + r0c = getbits_fast(4); + r1c = getbits_fast(3); + gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; + gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; + gr_info->block_type = 0; + gr_info->mixed_block_flag = 0; + } + gr_info->scalefac_scale = get1bit(); + gr_info->count1table_select = get1bit(); + } + return !0; +} + +/* + * read scalefactors + */ +#ifdef MPEG1 +static int III_get_scale_factors_1(int *scf,struct gr_info_s *gr_info) +{ + static const unsigned char slen[2][16] = { + {0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4}, + {0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3} + }; + int numbits; + int num0 = slen[0][gr_info->scalefac_compress]; + int num1 = slen[1][gr_info->scalefac_compress]; + + if (gr_info->block_type == 2) { + int i=18; + numbits = (num0 + num1) * 18; + + if (gr_info->mixed_block_flag) { + for (i=8;i;i--) + *scf++ = getbits_fast(num0); + i = 9; + numbits -= num0; /* num0 * 17 + num1 * 18 */ + } + + for (;i;i--) + *scf++ = getbits_fast(num0); + for (i = 18; i; i--) + *scf++ = getbits_fast(num1); + *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */ + } + else { + int i; + int scfsi = gr_info->scfsi; + + if(scfsi < 0) { /* scfsi < 0 => granule == 0 */ + for(i=11;i;i--) + *scf++ = getbits_fast(num0); + for(i=10;i;i--) + *scf++ = getbits_fast(num1); + numbits = (num0 + num1) * 10 + num0; + *scf++ = 0; + } + else { + numbits = 0; + if(!(scfsi & 0x8)) { + for (i=0;i<6;i++) + *scf++ = getbits_fast(num0); + numbits += num0 * 6; + } + else { + scf += 6; + } + + if(!(scfsi & 0x4)) { + for (i=0;i<5;i++) + *scf++ = getbits_fast(num0); + numbits += num0 * 5; + } + else { + scf += 5; + } + + if(!(scfsi & 0x2)) { + for(i=0;i<5;i++) + *scf++ = getbits_fast(num1); + numbits += num1 * 5; + } + else { + scf += 5; + } + + if(!(scfsi & 0x1)) { + for (i=0;i<5;i++) + *scf++ = getbits_fast(num1); + numbits += num1 * 5; + } + else { + scf += 5; + } + *scf++ = 0; /* no l[21] in original sources */ + } + } + return numbits; +} +#endif + + +static int III_get_scale_factors_2(int *scf,struct gr_info_s *gr_info,int i_stereo) +{ + unsigned char *pnt; + int i,j; + unsigned int slen; + int n = 0; + int numbits = 0; + + static unsigned char stab[3][6][4] = { + { { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} , + { 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} } , + { { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} , + {12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } , + { { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} , + { 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} } }; + + if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */ + slen = i_slen2[gr_info->scalefac_compress>>1]; + else + slen = n_slen2[gr_info->scalefac_compress]; + + gr_info->preflag = (slen>>15) & 0x1; + + n = 0; + if( gr_info->block_type == 2 ) { + n++; + if(gr_info->mixed_block_flag) + n++; + } + + pnt = stab[n][(slen>>12)&0x7]; + + for(i=0;i<4;i++) { + int num = slen & 0x7; + slen >>= 3; + if(num) { + for(j=0;j<(int)(pnt[i]);j++) + *scf++ = getbits_fast(num); + numbits += pnt[i] * num; + } + else { + for(j=0;j<(int)(pnt[i]);j++) + *scf++ = 0; + } + } + + n = (n << 1) + 1; + for(i=0;i<n;i++) + *scf++ = 0; + + return numbits; +} + +static int pretab1[22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0}; +static int pretab2[22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; + +/* + * don't forget to apply the same changes to III_dequantize_sample_ms() !!! + */ +static int III_dequantize_sample(real xr[SBLIMIT][SSLIMIT],int *scf, + struct gr_info_s *gr_info,int sfreq,int part2bits) +{ + int shift = 1 + gr_info->scalefac_scale; + real *xrpnt = (real *) xr; + int l[3],l3; + int part2remain = gr_info->part2_3_length - part2bits; + int *me; + + { + int bv = gr_info->big_values; + int region1 = gr_info->region1start; + int region2 = gr_info->region2start; + + l3 = ((576>>1)-bv)>>1; +/* + * we may lose the 'odd' bit here !! + * check this later again + */ + if(bv <= region1) { + l[0] = bv; l[1] = 0; l[2] = 0; + } + else { + l[0] = region1; + if(bv <= region2) { + l[1] = bv - l[0]; l[2] = 0; + } + else { + l[1] = region2 - l[0]; l[2] = bv - region2; + } + } + } + + if(gr_info->block_type == 2) { + /* + * decoding with short or mixed mode BandIndex table + */ + int i,max[4]; + int step=0,lwin=0,cb=0; + register real v = 0.0; + register int *m,mc; + + if(gr_info->mixed_block_flag) { + max[3] = -1; + max[0] = max[1] = max[2] = 2; + m = map[sfreq][0]; + me = mapend[sfreq][0]; + } + else { + max[0] = max[1] = max[2] = max[3] = -1; + /* max[3] not really needed in this case */ + m = map[sfreq][1]; + me = mapend[sfreq][1]; + } + + mc = 0; + for(i=0;i<2;i++) { + int lp = l[i]; + struct newhuff *h = ht+gr_info->table_select[i]; + for(;lp;lp--,mc--) { + register int x,y; + if( (!mc) ) { + mc = *m++; + xrpnt = ((real *) xr) + (*m++); + lwin = *m++; + cb = *m++; + if(lwin == 3) { + v = gr_info->pow2gain[(*scf++) << shift]; + step = 1; + } + else { + v = gr_info->full_gain[lwin][(*scf++) << shift]; + step = 3; + } + } + { + register short *val = h->table; + while((y=*val++)<0) { + if (get1bit()) + val -= y; + part2remain--; + } + x = y >> 4; + y &= 0xf; + } + if(x == 15) { + max[lwin] = cb; + part2remain -= h->linbits+1; + x += getbits(h->linbits); + if(get1bit()) + *xrpnt = -ispow[x] * v; + else + *xrpnt = ispow[x] * v; + } + else if(x) { + max[lwin] = cb; + if(get1bit()) + *xrpnt = -ispow[x] * v; + else + *xrpnt = ispow[x] * v; + part2remain--; + } + else + *xrpnt = 0.0; + xrpnt += step; + if(y == 15) { + max[lwin] = cb; + part2remain -= h->linbits+1; + y += getbits(h->linbits); + if(get1bit()) + *xrpnt = -ispow[y] * v; + else + *xrpnt = ispow[y] * v; + } + else if(y) { + max[lwin] = cb; + if(get1bit()) + *xrpnt = -ispow[y] * v; + else + *xrpnt = ispow[y] * v; + part2remain--; + } + else + *xrpnt = 0.0; + xrpnt += step; + } + } + for(;l3 && (part2remain > 0);l3--) { + struct newhuff *h = htc+gr_info->count1table_select; + register short *val = h->table,a; + + while((a=*val++)<0) { + part2remain--; + if(part2remain < 0) { + part2remain++; + a = 0; + break; + } + if (get1bit()) + val -= a; + } + + for(i=0;i<4;i++) { + if(!(i & 1)) { + if(!mc) { + mc = *m++; + xrpnt = ((real *) xr) + (*m++); + lwin = *m++; + cb = *m++; + if(lwin == 3) { + v = gr_info->pow2gain[(*scf++) << shift]; + step = 1; + } + else { + v = gr_info->full_gain[lwin][(*scf++) << shift]; + step = 3; + } + } + mc--; + } + if( (a & (0x8>>i)) ) { + max[lwin] = cb; + part2remain--; + if(part2remain < 0) { + part2remain++; + break; + } + if(get1bit()) + *xrpnt = -v; + else + *xrpnt = v; + } + else + *xrpnt = 0.0; + xrpnt += step; + } + } + + while( m < me ) { + if(!mc) { + mc = *m++; + xrpnt = ((real *) xr) + *m++; + if( (*m++) == 3) + step = 1; + else + step = 3; + m++; /* cb */ + } + mc--; + *xrpnt = 0.0; + xrpnt += step; + *xrpnt = 0.0; + xrpnt += step; +/* we could add a little opt. here: + * if we finished a band for window 3 or a long band + * further bands could copied in a simple loop without a + * special 'map' decoding + */ + } + + gr_info->maxband[0] = max[0]+1; + gr_info->maxband[1] = max[1]+1; + gr_info->maxband[2] = max[2]+1; + gr_info->maxbandl = max[3]+1; + + { + int rmax = max[0] > max[1] ? max[0] : max[1]; + rmax = (rmax > max[2] ? rmax : max[2]) + 1; + gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; + } + + } + else { + /* + * decoding with 'long' BandIndex table (block_type != 2) + */ + int *pretab = gr_info->preflag ? pretab1 : pretab2; + int i,max = -1; + int cb = 0; + register int *m = map[sfreq][2]; + register real v = 0.0; + register int mc = 0; +#if 0 + me = mapend[sfreq][2]; +#endif + + /* + * long hash table values + */ + for(i=0;i<3;i++) { + int lp = l[i]; + struct newhuff *h = ht+gr_info->table_select[i]; + + for(;lp;lp--,mc--) { + int x,y; + + if(!mc) { + mc = *m++; + v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; + cb = *m++; + } + { + register short *val = h->table; + while((y=*val++)<0) { + if (get1bit()) + val -= y; + part2remain--; + } + x = y >> 4; + y &= 0xf; + } + if (x == 15) { + max = cb; + part2remain -= h->linbits+1; + x += getbits(h->linbits); + if(get1bit()) + *xrpnt++ = -ispow[x] * v; + else + *xrpnt++ = ispow[x] * v; + } + else if(x) { + max = cb; + if(get1bit()) + *xrpnt++ = -ispow[x] * v; + else + *xrpnt++ = ispow[x] * v; + part2remain--; + } + else + *xrpnt++ = 0.0; + + if (y == 15) { + max = cb; + part2remain -= h->linbits+1; + y += getbits(h->linbits); + if(get1bit()) + *xrpnt++ = -ispow[y] * v; + else + *xrpnt++ = ispow[y] * v; + } + else if(y) { + max = cb; + if(get1bit()) + *xrpnt++ = -ispow[y] * v; + else + *xrpnt++ = ispow[y] * v; + part2remain--; + } + else + *xrpnt++ = 0.0; + } + } + + /* + * short (count1table) values + */ + for(;l3 && (part2remain > 0);l3--) { + struct newhuff *h = htc+gr_info->count1table_select; + register short *val = h->table,a; + + while((a=*val++)<0) { + part2remain--; + if(part2remain < 0) { + part2remain++; + a = 0; + break; + } + if (get1bit()) + val -= a; + } + + for(i=0;i<4;i++) { + if(!(i & 1)) { + if(!mc) { + mc = *m++; + cb = *m++; + v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; + } + mc--; + } + if ( (a & (0x8>>i)) ) { + max = cb; + part2remain--; + if(part2remain < 0) { + part2remain++; + break; + } + if(get1bit()) + *xrpnt++ = -v; + else + *xrpnt++ = v; + } + else + *xrpnt++ = 0.0; + } + } + + /* + * zero part + */ + for(i=(&xr[SBLIMIT][0]-xrpnt)>>1;i;i--) { + *xrpnt++ = 0.0; + *xrpnt++ = 0.0; + } + + gr_info->maxbandl = max+1; + gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; + } + + while( part2remain > 16 ) { + getbits(16); /* Dismiss stuffing Bits */ + part2remain -= 16; + } + if(part2remain > 0) + getbits(part2remain); + else if(part2remain < 0) { + fprintf(stderr,"mpg123: Can't rewind stream by %d bits!\n",-part2remain); + return 1; /* -> error */ + } + return 0; +} + +#if 0 +static int III_dequantize_sample_ms(real xr[2][SBLIMIT][SSLIMIT],int *scf, + struct gr_info_s *gr_info,int sfreq,int part2bits) +{ + int shift = 1 + gr_info->scalefac_scale; + real *xrpnt = (real *) xr[1]; + real *xr0pnt = (real *) xr[0]; + int l[3],l3; + int part2remain = gr_info->part2_3_length - part2bits; + int *me; + + { + int bv = gr_info->big_values; + int region1 = gr_info->region1start; + int region2 = gr_info->region2start; + + l3 = ((576>>1)-bv)>>1; +/* + * we may lose the 'odd' bit here !! + * check this later gain + */ + if(bv <= region1) { + l[0] = bv; l[1] = 0; l[2] = 0; + } + else { + l[0] = region1; + if(bv <= region2) { + l[1] = bv - l[0]; l[2] = 0; + } + else { + l[1] = region2 - l[0]; l[2] = bv - region2; + } + } + } + + if(gr_info->block_type == 2) { + int i,max[4]; + int step=0,lwin=0,cb=0; + register real v = 0.0; + register int *m,mc = 0; + + if(gr_info->mixed_block_flag) { + max[3] = -1; + max[0] = max[1] = max[2] = 2; + m = map[sfreq][0]; + me = mapend[sfreq][0]; + } + else { + max[0] = max[1] = max[2] = max[3] = -1; + /* max[3] not really needed in this case */ + m = map[sfreq][1]; + me = mapend[sfreq][1]; + } + + for(i=0;i<2;i++) { + int lp = l[i]; + struct newhuff *h = ht+gr_info->table_select[i]; + for(;lp;lp--,mc--) { + int x,y; + + if(!mc) { + mc = *m++; + xrpnt = ((real *) xr[1]) + *m; + xr0pnt = ((real *) xr[0]) + *m++; + lwin = *m++; + cb = *m++; + if(lwin == 3) { + v = gr_info->pow2gain[(*scf++) << shift]; + step = 1; + } + else { + v = gr_info->full_gain[lwin][(*scf++) << shift]; + step = 3; + } + } + { + register short *val = h->table; + while((y=*val++)<0) { + if (get1bit()) + val -= y; + part2remain--; + } + x = y >> 4; + y &= 0xf; + } + if(x == 15) { + max[lwin] = cb; + part2remain -= h->linbits+1; + x += getbits(h->linbits); + if(get1bit()) { + real a = ispow[x] * v; + *xrpnt = *xr0pnt + a; + *xr0pnt -= a; + } + else { + real a = ispow[x] * v; + *xrpnt = *xr0pnt - a; + *xr0pnt += a; + } + } + else if(x) { + max[lwin] = cb; + if(get1bit()) { + real a = ispow[x] * v; + *xrpnt = *xr0pnt + a; + *xr0pnt -= a; + } + else { + real a = ispow[x] * v; + *xrpnt = *xr0pnt - a; + *xr0pnt += a; + } + part2remain--; + } + else + *xrpnt = *xr0pnt; + xrpnt += step; + xr0pnt += step; + + if(y == 15) { + max[lwin] = cb; + part2remain -= h->linbits+1; + y += getbits(h->linbits); + if(get1bit()) { + real a = ispow[y] * v; + *xrpnt = *xr0pnt + a; + *xr0pnt -= a; + } + else { + real a = ispow[y] * v; + *xrpnt = *xr0pnt - a; + *xr0pnt += a; + } + } + else if(y) { + max[lwin] = cb; + if(get1bit()) { + real a = ispow[y] * v; + *xrpnt = *xr0pnt + a; + *xr0pnt -= a; + } + else { + real a = ispow[y] * v; + *xrpnt = *xr0pnt - a; + *xr0pnt += a; + } + part2remain--; + } + else + *xrpnt = *xr0pnt; + xrpnt += step; + xr0pnt += step; + } + } + + for(;l3 && (part2remain > 0);l3--) { + struct newhuff *h = htc+gr_info->count1table_select; + register short *val = h->table,a; + + while((a=*val++)<0) { + part2remain--; + if(part2remain < 0) { + part2remain++; + a = 0; + break; + } + if (get1bit()) + val -= a; + } + + for(i=0;i<4;i++) { + if(!(i & 1)) { + if(!mc) { + mc = *m++; + xrpnt = ((real *) xr[1]) + *m; + xr0pnt = ((real *) xr[0]) + *m++; + lwin = *m++; + cb = *m++; + if(lwin == 3) { + v = gr_info->pow2gain[(*scf++) << shift]; + step = 1; + } + else { + v = gr_info->full_gain[lwin][(*scf++) << shift]; + step = 3; + } + } + mc--; + } + if( (a & (0x8>>i)) ) { + max[lwin] = cb; + part2remain--; + if(part2remain < 0) { + part2remain++; + break; + } + if(get1bit()) { + *xrpnt = *xr0pnt + v; + *xr0pnt -= v; + } + else { + *xrpnt = *xr0pnt - v; + *xr0pnt += v; + } + } + else + *xrpnt = *xr0pnt; + xrpnt += step; + xr0pnt += step; + } + } + + while( m < me ) { + if(!mc) { + mc = *m++; + xrpnt = ((real *) xr[1]) + *m; + xr0pnt = ((real *) xr[0]) + *m++; + if(*m++ == 3) + step = 1; + else + step = 3; + m++; /* cb */ + } + mc--; + *xrpnt = *xr0pnt; + xrpnt += step; + xr0pnt += step; + *xrpnt = *xr0pnt; + xrpnt += step; + xr0pnt += step; +/* we could add a little opt. here: + * if we finished a band for window 3 or a long band + * further bands could copied in a simple loop without a + * special 'map' decoding + */ + } + + gr_info->maxband[0] = max[0]+1; + gr_info->maxband[1] = max[1]+1; + gr_info->maxband[2] = max[2]+1; + gr_info->maxbandl = max[3]+1; + + { + int rmax = max[0] > max[1] ? max[0] : max[1]; + rmax = (rmax > max[2] ? rmax : max[2]) + 1; + gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; + } + } + else { + int *pretab = gr_info->preflag ? pretab1 : pretab2; + int i,max = -1; + int cb = 0; + register int mc=0,*m = map[sfreq][2]; + register real v = 0.0; +#if 0 + me = mapend[sfreq][2]; +#endif + + for(i=0;i<3;i++) { + int lp = l[i]; + struct newhuff *h = ht+gr_info->table_select[i]; + + for(;lp;lp--,mc--) { + int x,y; + if(!mc) { + mc = *m++; + cb = *m++; + v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; + } + { + register short *val = h->table; + while((y=*val++)<0) { + if (get1bit()) + val -= y; + part2remain--; + } + x = y >> 4; + y &= 0xf; + } + if (x == 15) { + max = cb; + part2remain -= h->linbits+1; + x += getbits(h->linbits); + if(get1bit()) { + real a = ispow[x] * v; + *xrpnt++ = *xr0pnt + a; + *xr0pnt++ -= a; + } + else { + real a = ispow[x] * v; + *xrpnt++ = *xr0pnt - a; + *xr0pnt++ += a; + } + } + else if(x) { + max = cb; + if(get1bit()) { + real a = ispow[x] * v; + *xrpnt++ = *xr0pnt + a; + *xr0pnt++ -= a; + } + else { + real a = ispow[x] * v; + *xrpnt++ = *xr0pnt - a; + *xr0pnt++ += a; + } + part2remain--; + } + else + *xrpnt++ = *xr0pnt++; + + if (y == 15) { + max = cb; + part2remain -= h->linbits+1; + y += getbits(h->linbits); + if(get1bit()) { + real a = ispow[y] * v; + *xrpnt++ = *xr0pnt + a; + *xr0pnt++ -= a; + } + else { + real a = ispow[y] * v; + *xrpnt++ = *xr0pnt - a; + *xr0pnt++ += a; + } + } + else if(y) { + max = cb; + if(get1bit()) { + real a = ispow[y] * v; + *xrpnt++ = *xr0pnt + a; + *xr0pnt++ -= a; + } + else { + real a = ispow[y] * v; + *xrpnt++ = *xr0pnt - a; + *xr0pnt++ += a; + } + part2remain--; + } + else + *xrpnt++ = *xr0pnt++; + } + } + + for(;l3 && (part2remain > 0);l3--) { + struct newhuff *h = htc+gr_info->count1table_select; + register short *val = h->table,a; + + while((a=*val++)<0) { + part2remain--; + if(part2remain < 0) { + part2remain++; + a = 0; + break; + } + if (get1bit()) + val -= a; + } + + for(i=0;i<4;i++) { + if(!(i & 1)) { + if(!mc) { + mc = *m++; + cb = *m++; + v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; + } + mc--; + } + if ( (a & (0x8>>i)) ) { + max = cb; + part2remain--; + if(part2remain <= 0) { + part2remain++; + break; + } + if(get1bit()) { + *xrpnt++ = *xr0pnt + v; + *xr0pnt++ -= v; + } + else { + *xrpnt++ = *xr0pnt - v; + *xr0pnt++ += v; + } + } + else + *xrpnt++ = *xr0pnt++; + } + } + for(i=(&xr[1][SBLIMIT][0]-xrpnt)>>1;i;i--) { + *xrpnt++ = *xr0pnt++; + *xrpnt++ = *xr0pnt++; + } + + gr_info->maxbandl = max+1; + gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; + } + + while ( part2remain > 16 ) { + getbits(16); /* Dismiss stuffing Bits */ + part2remain -= 16; + } + if(part2remain > 0 ) + getbits(part2remain); + else if(part2remain < 0) { + fprintf(stderr,"mpg123_ms: Can't rewind stream by %d bits!\n",-part2remain); + return 1; /* -> error */ + } + return 0; +} +#endif + +/* + * III_stereo: calculate real channel values for Joint-I-Stereo-mode + */ +static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac, + struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf) +{ + real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf; + struct bandInfoStruct *bi = &bandInfo[sfreq]; + real *tab1,*tab2; + + if(lsf) { + int p = gr_info->scalefac_compress & 0x1; + if(ms_stereo) { + tab1 = pow1_2[p]; tab2 = pow2_2[p]; + } + else { + tab1 = pow1_1[p]; tab2 = pow2_1[p]; + } + } + else { + if(ms_stereo) { + tab1 = tan1_2; tab2 = tan2_2; + } + else { + tab1 = tan1_1; tab2 = tan2_1; + } + } + + if (gr_info->block_type == 2) + { + int lwin,do_l = 0; + if( gr_info->mixed_block_flag ) + do_l = 1; + + for (lwin=0;lwin<3;lwin++) /* process each window */ + { + /* get first band with zero values */ + int is_p,sb,idx,sfb = gr_info->maxband[lwin]; /* sfb is minimal 3 for mixed mode */ + if(sfb > 3) + do_l = 0; + + for(;sfb<12;sfb++) + { + is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ + if(is_p != 7) { + real t1,t2; + sb = bi->shortDiff[sfb]; + idx = bi->shortIdx[sfb] + lwin; + t1 = tab1[is_p]; t2 = tab2[is_p]; + for (; sb > 0; sb--,idx+=3) + { + real v = xr[0][idx]; + xr[0][idx] = v * t1; + xr[1][idx] = v * t2; + } + } + } + +#if 1 +/* in the original: copy 10 to 11 , here: copy 11 to 12 +maybe still wrong??? (copy 12 to 13?) */ + is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ + sb = bi->shortDiff[12]; + idx = bi->shortIdx[12] + lwin; +#else + is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ + sb = bi->shortDiff[11]; + idx = bi->shortIdx[11] + lwin; +#endif + if(is_p != 7) + { + real t1,t2; + t1 = tab1[is_p]; t2 = tab2[is_p]; + for ( ; sb > 0; sb--,idx+=3 ) + { + real v = xr[0][idx]; + xr[0][idx] = v * t1; + xr[1][idx] = v * t2; + } + } + } /* end for(lwin; .. ; . ) */ + + if (do_l) + { +/* also check l-part, if ALL bands in the three windows are 'empty' + * and mode = mixed_mode + */ + int sfb = gr_info->maxbandl; + int idx = bi->longIdx[sfb]; + + for ( ; sfb<8; sfb++ ) + { + int sb = bi->longDiff[sfb]; + int is_p = scalefac[sfb]; /* scale: 0-15 */ + if(is_p != 7) { + real t1,t2; + t1 = tab1[is_p]; t2 = tab2[is_p]; + for ( ; sb > 0; sb--,idx++) + { + real v = xr[0][idx]; + xr[0][idx] = v * t1; + xr[1][idx] = v * t2; + } + } + else + idx += sb; + } + } + } + else /* ((gr_info->block_type != 2)) */ + { + int sfb = gr_info->maxbandl; + int is_p,idx = bi->longIdx[sfb]; + for ( ; sfb<21; sfb++) + { + int sb = bi->longDiff[sfb]; + is_p = scalefac[sfb]; /* scale: 0-15 */ + if(is_p != 7) { + real t1,t2; + t1 = tab1[is_p]; t2 = tab2[is_p]; + for ( ; sb > 0; sb--,idx++) + { + real v = xr[0][idx]; + xr[0][idx] = v * t1; + xr[1][idx] = v * t2; + } + } + else + idx += sb; + } + + is_p = scalefac[20]; /* copy l-band 20 to l-band 21 */ + if(is_p != 7) + { + int sb; + real t1 = tab1[is_p],t2 = tab2[is_p]; + + for ( sb = bi->longDiff[21]; sb > 0; sb--,idx++ ) + { + real v = xr[0][idx]; + xr[0][idx] = v * t1; + xr[1][idx] = v * t2; + } + } + } /* ... */ +} + +static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info) +{ + int sblim; + + if(gr_info->block_type == 2) + { + if(!gr_info->mixed_block_flag) + return; + sblim = 1; + } + else { + sblim = gr_info->maxb-1; + } + + /* 31 alias-reduction operations between each pair of sub-bands */ + /* with 8 butterflies between each pair */ + + { + int sb; + real *xr1=(real *) xr[1]; + + for(sb=sblim;sb;sb--,xr1+=10) + { + int ss; + real *cs=aa_cs,*ca=aa_ca; + real *xr2 = xr1; + + for(ss=7;ss>=0;ss--) + { /* upper and lower butterfly inputs */ + register real bu = *--xr2,bd = *xr1; + *xr2 = (bu * (*cs) ) - (bd * (*ca) ); + *xr1++ = (bd * (*cs++) ) + (bu * (*ca++) ); + } + } + } +} + +/* + DCT insipired by Jeff Tsay's DCT from the maplay package + this is an optimized version with manual unroll. + + References: + [1] S. Winograd: "On Computing the Discrete Fourier Transform", + Mathematics of Computation, Volume 32, Number 141, January 1978, + Pages 175-199 +*/ + +static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf) +{ + { + register real *in = inbuf; + + in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14]; + in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11]; + in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8]; + in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5]; + in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2]; + in[2] +=in[1]; in[1] +=in[0]; + + in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9]; + in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1]; + + + { + +#define MACRO0(v) { \ + real tmp; \ + out2[9+(v)] = (tmp = sum0 + sum1) * w[27+(v)]; \ + out2[8-(v)] = tmp * w[26-(v)]; } \ + sum0 -= sum1; \ + ts[SBLIMIT*(8-(v))] = out1[8-(v)] + sum0 * w[8-(v)]; \ + ts[SBLIMIT*(9+(v))] = out1[9+(v)] + sum0 * w[9+(v)]; +#define MACRO1(v) { \ + real sum0,sum1; \ + sum0 = tmp1a + tmp2a; \ + sum1 = (tmp1b + tmp2b) * tfcos36[(v)]; \ + MACRO0(v); } +#define MACRO2(v) { \ + real sum0,sum1; \ + sum0 = tmp2a - tmp1a; \ + sum1 = (tmp2b - tmp1b) * tfcos36[(v)]; \ + MACRO0(v); } + + register const real *c = COS9; + register real *out2 = o2; + register real *w = wintab; + register real *out1 = o1; + register real *ts = tsbuf; + + real ta33,ta66,tb33,tb66; + + ta33 = in[2*3+0] * c[3]; + ta66 = in[2*6+0] * c[6]; + tb33 = in[2*3+1] * c[3]; + tb66 = in[2*6+1] * c[6]; + + { + real tmp1a,tmp2a,tmp1b,tmp2b; + tmp1a = in[2*1+0] * c[1] + ta33 + in[2*5+0] * c[5] + in[2*7+0] * c[7]; + tmp1b = in[2*1+1] * c[1] + tb33 + in[2*5+1] * c[5] + in[2*7+1] * c[7]; + tmp2a = in[2*0+0] + in[2*2+0] * c[2] + in[2*4+0] * c[4] + ta66 + in[2*8+0] * c[8]; + tmp2b = in[2*0+1] + in[2*2+1] * c[2] + in[2*4+1] * c[4] + tb66 + in[2*8+1] * c[8]; + + MACRO1(0); + MACRO2(8); + } + + { + real tmp1a,tmp2a,tmp1b,tmp2b; + tmp1a = ( in[2*1+0] - in[2*5+0] - in[2*7+0] ) * c[3]; + tmp1b = ( in[2*1+1] - in[2*5+1] - in[2*7+1] ) * c[3]; + tmp2a = ( in[2*2+0] - in[2*4+0] - in[2*8+0] ) * c[6] - in[2*6+0] + in[2*0+0]; + tmp2b = ( in[2*2+1] - in[2*4+1] - in[2*8+1] ) * c[6] - in[2*6+1] + in[2*0+1]; + + MACRO1(1); + MACRO2(7); + } + + { + real tmp1a,tmp2a,tmp1b,tmp2b; + tmp1a = in[2*1+0] * c[5] - ta33 - in[2*5+0] * c[7] + in[2*7+0] * c[1]; + tmp1b = in[2*1+1] * c[5] - tb33 - in[2*5+1] * c[7] + in[2*7+1] * c[1]; + tmp2a = in[2*0+0] - in[2*2+0] * c[8] - in[2*4+0] * c[2] + ta66 + in[2*8+0] * c[4]; + tmp2b = in[2*0+1] - in[2*2+1] * c[8] - in[2*4+1] * c[2] + tb66 + in[2*8+1] * c[4]; + + MACRO1(2); + MACRO2(6); + } + + { + real tmp1a,tmp2a,tmp1b,tmp2b; + tmp1a = in[2*1+0] * c[7] - ta33 + in[2*5+0] * c[1] - in[2*7+0] * c[5]; + tmp1b = in[2*1+1] * c[7] - tb33 + in[2*5+1] * c[1] - in[2*7+1] * c[5]; + tmp2a = in[2*0+0] - in[2*2+0] * c[4] + in[2*4+0] * c[8] + ta66 - in[2*8+0] * c[2]; + tmp2b = in[2*0+1] - in[2*2+1] * c[4] + in[2*4+1] * c[8] + tb66 - in[2*8+1] * c[2]; + + MACRO1(3); + MACRO2(5); + } + + { + real sum0,sum1; + sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0]; + sum1 = (in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ) * tfcos36[4]; + MACRO0(4); + } + } + + } +} + +/* + * new DCT12 + */ +static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts) +{ +#define DCT12_PART1 \ + in5 = in[5*3]; \ + in5 += (in4 = in[4*3]); \ + in4 += (in3 = in[3*3]); \ + in3 += (in2 = in[2*3]); \ + in2 += (in1 = in[1*3]); \ + in1 += (in0 = in[0*3]); \ + \ + in5 += in3; in3 += in1; \ + \ + in2 *= COS6_1; \ + in3 *= COS6_1; \ + +#define DCT12_PART2 \ + in0 += in4 * COS6_2; \ + \ + in4 = in0 + in2; \ + in0 -= in2; \ + \ + in1 += in5 * COS6_2; \ + \ + in5 = (in1 + in3) * tfcos12[0]; \ + in1 = (in1 - in3) * tfcos12[2]; \ + \ + in3 = in4 + in5; \ + in4 -= in5; \ + \ + in2 = in0 + in1; \ + in0 -= in1; + + + { + real in0,in1,in2,in3,in4,in5; + register real *out1 = rawout1; + ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2]; + ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5]; + + DCT12_PART1 + + { + real tmp0,tmp1 = (in0 - in4); + { + real tmp2 = (in1 - in5) * tfcos12[1]; + tmp0 = tmp1 + tmp2; + tmp1 -= tmp2; + } + ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1]; + ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1]; + ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1]; + ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1]; + } + + DCT12_PART2 + + ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0]; + ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0]; + ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2]; + ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2]; + + ts[(6+0)*SBLIMIT] = out1[6+0] + in0 * wi[0]; + ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0]; + ts[(6+2)*SBLIMIT] = out1[6+2] + in4 * wi[2]; + ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2]; + } + + in++; + + { + real in0,in1,in2,in3,in4,in5; + register real *out2 = rawout2; + + DCT12_PART1 + + { + real tmp0,tmp1 = (in0 - in4); + { + real tmp2 = (in1 - in5) * tfcos12[1]; + tmp0 = tmp1 + tmp2; + tmp1 -= tmp2; + } + out2[5-1] = tmp0 * wi[11-1]; + out2[0+1] = tmp0 * wi[6+1]; + ts[(12+1)*SBLIMIT] += tmp1 * wi[1]; + ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1]; + } + + DCT12_PART2 + + out2[5-0] = in2 * wi[11-0]; + out2[0+0] = in2 * wi[6+0]; + out2[0+2] = in3 * wi[6+2]; + out2[5-2] = in3 * wi[11-2]; + + ts[(12+0)*SBLIMIT] += in0 * wi[0]; + ts[(17-0)*SBLIMIT] += in0 * wi[5-0]; + ts[(12+2)*SBLIMIT] += in4 * wi[2]; + ts[(17-2)*SBLIMIT] += in4 * wi[5-2]; + } + + in++; + + { + real in0,in1,in2,in3,in4,in5; + register real *out2 = rawout2; + out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0; + + DCT12_PART1 + + { + real tmp0,tmp1 = (in0 - in4); + { + real tmp2 = (in1 - in5) * tfcos12[1]; + tmp0 = tmp1 + tmp2; + tmp1 -= tmp2; + } + out2[11-1] = tmp0 * wi[11-1]; + out2[6 +1] = tmp0 * wi[6+1]; + out2[0+1] += tmp1 * wi[1]; + out2[5-1] += tmp1 * wi[5-1]; + } + + DCT12_PART2 + + out2[11-0] = in2 * wi[11-0]; + out2[6 +0] = in2 * wi[6+0]; + out2[6 +2] = in3 * wi[6+2]; + out2[11-2] = in3 * wi[11-2]; + + out2[0+0] += in0 * wi[0]; + out2[5-0] += in0 * wi[5-0]; + out2[0+2] += in4 * wi[2]; + out2[5-2] += in4 * wi[5-2]; + } +} + +/* + * III_hybrid + */ +static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT], + int ch,struct gr_info_s *gr_info) +{ + real *tspnt = (real *) tsOut; + real (*block)[2][SBLIMIT*SSLIMIT] = gmp->hybrid_block; + int *blc = gmp->hybrid_blc; + real *rawout1,*rawout2; + int bt; + int sb = 0; + + { + int b = blc[ch]; + rawout1=block[b][ch]; + b=-b+1; + rawout2=block[b][ch]; + blc[ch] = b; + } + + + if(gr_info->mixed_block_flag) { + sb = 2; + dct36(fsIn[0],rawout1,rawout2,win[0],tspnt); + dct36(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1); + rawout1 += 36; rawout2 += 36; tspnt += 2; + } + + bt = gr_info->block_type; + if(bt == 2) { + for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { + dct12(fsIn[sb],rawout1,rawout2,win[2],tspnt); + dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1); + } + } + else { + for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) { + dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt); + dct36(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1); + } + } + + for(;sb<SBLIMIT;sb++,tspnt++) { + int i; + for(i=0;i<SSLIMIT;i++) { + tspnt[i*SBLIMIT] = *rawout1++; + *rawout2++ = 0.0; + } + } +} + +/* + * main layer3 handler + */ +int do_layer3(struct frame *fr,unsigned char *pcm_sample,int *pcm_point) +{ + int gr, ch, ss,clip=0; + int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */ + struct III_sideinfo sideinfo; + int stereo = fr->stereo; + int single = fr->single; + int ms_stereo,i_stereo; + int sfreq = fr->sampling_frequency; + int stereo1,granules; + + if(stereo == 1) { /* stream is mono */ + stereo1 = 1; + single = 0; + } + else if(single >= 0) /* stream is stereo, but force to mono */ + stereo1 = 1; + else + stereo1 = 2; + + if(fr->mode == MPG_MD_JOINT_STEREO) { + ms_stereo = fr->mode_ext & 0x2; + i_stereo = fr->mode_ext & 0x1; + } + else + ms_stereo = i_stereo = 0; + + if(fr->lsf) { + granules = 1; + if(!III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single)) + return -1; + } + else { + granules = 2; +#ifdef MPEG1 + if(!III_get_side_info_1(&sideinfo,stereo,ms_stereo,sfreq,single)) + return -1; +#else + fprintf(stderr,"Not supported\n"); +#endif + } + + if(set_pointer(sideinfo.main_data_begin) == MP3_ERR) + return -1; + + for (gr=0;gr<granules;gr++) + { + real hybridIn[2][SBLIMIT][SSLIMIT]; + real hybridOut[2][SSLIMIT][SBLIMIT]; + + { + struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]); + long part2bits; + if(fr->lsf) + part2bits = III_get_scale_factors_2(scalefacs[0],gr_info,0); + else { +#ifdef MPEG1 + part2bits = III_get_scale_factors_1(scalefacs[0],gr_info); +#else + fprintf(stderr,"Not supported\n"); +#endif + } + if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits)) + return clip; + } + if(stereo == 2) { + struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]); + long part2bits; + if(fr->lsf) + part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo); + else { +#ifdef MPEG1 + part2bits = III_get_scale_factors_1(scalefacs[1],gr_info); +#else + fprintf(stderr,"Not supported\n"); +#endif + } + + if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits)) + return clip; + + if(ms_stereo) { + int i; + for(i=0;i<SBLIMIT*SSLIMIT;i++) { + real tmp0,tmp1; + tmp0 = ((real *) hybridIn[0])[i]; + tmp1 = ((real *) hybridIn[1])[i]; + ((real *) hybridIn[0])[i] = tmp0 + tmp1; + ((real *) hybridIn[1])[i] = tmp0 - tmp1; + } + } + + if(i_stereo) + III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf); + + if(ms_stereo || i_stereo || (single == 3) ) { + if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb) + sideinfo.ch[0].gr[gr].maxb = gr_info->maxb; + else + gr_info->maxb = sideinfo.ch[0].gr[gr].maxb; + } + + switch(single) { + case 3: + { + register int i; + register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; + for(i=0;i<SSLIMIT*gr_info->maxb;i++,in0++) + *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */ + } + break; + case 1: + { + register int i; + register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; + for(i=0;i<SSLIMIT*gr_info->maxb;i++) + *in0++ = *in1++; + } + break; + } + } + + for(ch=0;ch<stereo1;ch++) { + struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]); + III_antialias(hybridIn[ch],gr_info); + III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info); + } + + for(ss=0;ss<SSLIMIT;ss++) { + if(single >= 0) { + clip += synth_1to1_mono(hybridOut[0][ss],pcm_sample,pcm_point); + } + else { + int p1 = *pcm_point; + clip += synth_1to1(hybridOut[0][ss],0,pcm_sample,&p1); + clip += synth_1to1(hybridOut[1][ss],1,pcm_sample,pcm_point); + } + } + } + + return clip; +} + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/main.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,33 @@ + +#include "mpg123_sdlsound.h" +#include "mpglib_sdlsound.h" + +#error This is for example usage. Do not compile for SDL_sound. + +char buf[16384]; +struct mpstr mp; + +int main(int argc,char **argv) +{ + int size; + char out[8192]; + int len,ret; + + + InitMP3(&mp); + + while(1) { + len = read(0,buf,16384); + if(len <= 0) + break; + ret = decodeMP3(&mp,buf,len,out,8192,&size); + while(ret == MP3_OK) { + write(1,out,size); + ret = decodeMP3(&mp,NULL,0,out,8192,&size); + } + } + + return 0; + +} +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/mpg123_sdlsound.h Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,193 @@ +#include <stdio.h> +#include <string.h> +#include <signal.h> + +#ifndef WIN32 +#include <sys/signal.h> +#include <unistd.h> +#endif + +#include <math.h> + +#ifdef _WIN32 +# undef WIN32 +# define WIN32 + +# define M_PI 3.14159265358979323846 +# define M_SQRT2 1.41421356237309504880 +# define REAL_IS_FLOAT +# define NEW_DCT9 + +# define random rand +# define srandom srand + +#endif + +#ifdef REAL_IS_FLOAT +# define real float +#elif defined(REAL_IS_LONG_DOUBLE) +# define real long double +#else +# define real double +#endif + +#ifdef __GNUC__ +#define INLINE inline +#else +#define INLINE +#endif + +/* AUDIOBUFSIZE = n*64 with n=1,2,3 ... */ +#define AUDIOBUFSIZE 16384 + +#ifndef FALSE +#define FALSE 0 +#endif +#ifndef FALSE +#define TRUE 1 +#endif + +#define SBLIMIT 32 +#define SSLIMIT 18 + +#define SCALE_BLOCK 12 + + +#define MPG_MD_STEREO 0 +#define MPG_MD_JOINT_STEREO 1 +#define MPG_MD_DUAL_CHANNEL 2 +#define MPG_MD_MONO 3 + +#define MAXFRAMESIZE 1792 + + +/* Pre Shift fo 16 to 8 bit converter table */ +#define AUSHIFT (3) + +struct frame { + int stereo; + int jsbound; + int single; + int lsf; + int mpeg25; + int header_change; + int lay; + int error_protection; + int bitrate_index; + int sampling_frequency; + int padding; + int extension; + int mode; + int mode_ext; + int copyright; + int original; + int emphasis; + int framesize; /* computed framesize */ + + /* layer2 stuff */ + int II_sblimit; + void *alloc; +}; + +struct parameter { + int quiet; /* shut up! */ + int tryresync; /* resync stream after error */ + int verbose; /* verbose level */ + int checkrange; +}; + +extern unsigned int get1bit(void); +extern unsigned int getbits(int); +extern unsigned int getbits_fast(int); +extern int set_pointer(long); + +extern unsigned char *wordpointer; +extern int bitindex; + +extern void make_decode_tables(long scaleval); +extern int do_layer3(struct frame *fr,unsigned char *,int *); +extern int do_layer2(struct frame *fr,unsigned char *,int *); +extern int do_layer1(struct frame *fr,unsigned char *,int *); +extern int decode_header(struct frame *fr,unsigned long newhead); + + + +struct gr_info_s { + int scfsi; + unsigned part2_3_length; + unsigned big_values; + unsigned scalefac_compress; + unsigned block_type; + unsigned mixed_block_flag; + unsigned table_select[3]; + unsigned subblock_gain[3]; + unsigned maxband[3]; + unsigned maxbandl; + unsigned maxb; + unsigned region1start; + unsigned region2start; + unsigned preflag; + unsigned scalefac_scale; + unsigned count1table_select; + real *full_gain[3]; + real *pow2gain; +}; + +struct III_sideinfo +{ + unsigned main_data_begin; + unsigned private_bits; + struct { + struct gr_info_s gr[2]; + } ch[2]; +}; + +extern int synth_1to1 (real *,int,unsigned char *,int *); +extern int synth_1to1_8bit (real *,int,unsigned char *,int *); +extern int synth_1to1_mono (real *,unsigned char *,int *); +extern int synth_1to1_mono2stereo (real *,unsigned char *,int *); +extern int synth_1to1_8bit_mono (real *,unsigned char *,int *); +extern int synth_1to1_8bit_mono2stereo (real *,unsigned char *,int *); + +extern int synth_2to1 (real *,int,unsigned char *,int *); +extern int synth_2to1_8bit (real *,int,unsigned char *,int *); +extern int synth_2to1_mono (real *,unsigned char *,int *); +extern int synth_2to1_mono2stereo (real *,unsigned char *,int *); +extern int synth_2to1_8bit_mono (real *,unsigned char *,int *); +extern int synth_2to1_8bit_mono2stereo (real *,unsigned char *,int *); + +extern int synth_4to1 (real *,int,unsigned char *,int *); +extern int synth_4to1_8bit (real *,int,unsigned char *,int *); +extern int synth_4to1_mono (real *,unsigned char *,int *); +extern int synth_4to1_mono2stereo (real *,unsigned char *,int *); +extern int synth_4to1_8bit_mono (real *,unsigned char *,int *); +extern int synth_4to1_8bit_mono2stereo (real *,unsigned char *,int *); + +extern int synth_ntom (real *,int,unsigned char *,int *); +extern int synth_ntom_8bit (real *,int,unsigned char *,int *); +extern int synth_ntom_mono (real *,unsigned char *,int *); +extern int synth_ntom_mono2stereo (real *,unsigned char *,int *); +extern int synth_ntom_8bit_mono (real *,unsigned char *,int *); +extern int synth_ntom_8bit_mono2stereo (real *,unsigned char *,int *); + +extern void rewindNbits(int bits); +extern int hsstell(void); +extern int get_songlen(struct frame *fr,int no); + +extern void init_layer3(int); +extern void init_layer2(void); +extern void make_decode_tables(long scale); +extern void make_conv16to8_table(int); +extern void dct64(real *,real *,real *); + +extern void synth_ntom_set_step(long,long); + +extern unsigned char *conv16to8; +extern long freqs[9]; +extern real muls[27][64]; +extern real decwin[512+32]; +extern real *pnts[5]; + +extern struct parameter param; + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/mpglib_sdlsound.h Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,54 @@ + +struct buf { + unsigned char *pnt; + long size; + long pos; + struct buf *next; + struct buf *prev; +}; + +struct framebuf { + struct buf *buf; + long pos; + struct frame *next; + struct frame *prev; +}; + +struct mpstr { + struct buf *head,*tail; + int bsize; + int framesize; + int fsizeold; + struct frame fr; + unsigned char bsspace[2][MAXFRAMESIZE+512]; /* MAXFRAMESIZE */ + real hybrid_block[2][2][SBLIMIT*SSLIMIT]; + int hybrid_blc[2]; + unsigned long header; + int bsnum; + real synth_buffs[2][2][0x110]; + int synth_bo; +}; + +#ifndef BOOL +#define BOOL int +#endif + +#define MP3_ERR -1 +#define MP3_OK 0 +#define MP3_NEED_MORE 1 + + +#ifdef __cplusplus +extern "C" { +#endif + +BOOL InitMP3(struct mpstr *mp); +int decodeMP3(struct mpstr *mp,char *inmemory,int inmemsize, + char *outmemory,int outmemsize,int *done); +void ExitMP3(struct mpstr *mp); + +#ifdef __cplusplus +} +#endif + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/decoders/mpglib/tabinit.c Thu Feb 21 19:46:09 2002 +0000 @@ -0,0 +1,80 @@ + +#include <stdlib.h> + +#include "mpg123_sdlsound.h" + +real decwin[512+32]; +static real cos64[16],cos32[8],cos16[4],cos8[2],cos4[1]; +real *pnts[] = { cos64,cos32,cos16,cos8,cos4 }; + +#if 0 +static unsigned char *conv16to8_buf = NULL; +unsigned char *conv16to8; +#endif + +static long intwinbase[] = { + 0, -1, -1, -1, -1, -1, -1, -2, -2, -2, + -2, -3, -3, -4, -4, -5, -5, -6, -7, -7, + -8, -9, -10, -11, -13, -14, -16, -17, -19, -21, + -24, -26, -29, -31, -35, -38, -41, -45, -49, -53, + -58, -63, -68, -73, -79, -85, -91, -97, -104, -111, + -117, -125, -132, -139, -147, -154, -161, -169, -176, -183, + -190, -196, -202, -208, -213, -218, -222, -225, -227, -228, + -228, -227, -224, -221, -215, -208, -200, -189, -177, -163, + -146, -127, -106, -83, -57, -29, 2, 36, 72, 111, + 153, 197, 244, 294, 347, 401, 459, 519, 581, 645, + 711, 779, 848, 919, 991, 1064, 1137, 1210, 1283, 1356, + 1428, 1498, 1567, 1634, 1698, 1759, 1817, 1870, 1919, 1962, + 2001, 2032, 2057, 2075, 2085, 2087, 2080, 2063, 2037, 2000, + 1952, 1893, 1822, 1739, 1644, 1535, 1414, 1280, 1131, 970, + 794, 605, 402, 185, -45, -288, -545, -814, -1095, -1388, + -1692, -2006, -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788, + -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, -7910, -8209, + -8491, -8755, -8998, -9219, -9416, -9585, -9727, -9838, -9916, -9959, + -9966, -9935, -9863, -9750, -9592, -9389, -9139, -8840, -8492, -8092, + -7640, -7134, -6574, -5959, -5288, -4561, -3776, -2935, -2037, -1082, + -70, 998, 2122, 3300, 4533, 5818, 7154, 8540, 9975, 11455, + 12980, 14548, 16155, 17799, 19478, 21189, 22929, 24694, 26482, 28289, + 30112, 31947, 33791, 35640, 37489, 39336, 41176, 43006, 44821, 46617, + 48390, 50137, 51853, 53534, 55178, 56778, 58333, 59838, 61289, 62684, + 64019, 65290, 66494, 67629, 68692, 69679, 70590, 71420, 72169, 72835, + 73415, 73908, 74313, 74630, 74856, 74992, 75038 }; + +void make_decode_tables(long scaleval) +{ + int i,j,k,kr,divv; + real *table,*costab; + + + for(i=0;i<5;i++) + { + kr=0x10>>i; divv=0x40>>i; + costab = pnts[i]; + for(k=0;k<kr;k++) + costab[k] = 1.0 / (2.0 * cos(M_PI * ((double) k * 2.0 + 1.0) / (double) divv)); + } + + table = decwin; + scaleval = -scaleval; + for(i=0,j=0;i<256;i++,j++,table+=32) + { + if(table < decwin+512+16) + table[16] = table[0] = (double) intwinbase[j] / 65536.0 * (double) scaleval; + if(i % 32 == 31) + table -= 1023; + if(i % 64 == 63) + scaleval = - scaleval; + } + + for( /* i=256 */ ;i<512;i++,j--,table+=32) + { + if(table < decwin+512+16) + table[16] = table[0] = (double) intwinbase[j] / 65536.0 * (double) scaleval; + if(i % 32 == 31) + table -= 1023; + if(i % 64 == 63) + scaleval = - scaleval; + } +} + +