mirror of
https://github.com/reactos/wine.git
synced 2024-11-26 21:20:25 +00:00
257 lines
6.6 KiB
C
257 lines
6.6 KiB
C
/*
|
|
* Copyright (c) Michael Hipp and other authors of the mpglib project.
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
|
|
#include <sys/types.h>
|
|
#ifdef HAVE_SYS_STAT_H
|
|
# include <sys/stat.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
|
|
#include "mpg123.h"
|
|
|
|
const struct parameter param = { 1 , 1 , 0 , 0 };
|
|
|
|
static const 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,} }
|
|
};
|
|
|
|
const 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
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
/*
|
|
* the code a header and write the information
|
|
* into the frame structure
|
|
*/
|
|
int decode_header(struct frame *fr,unsigned long newhead)
|
|
{
|
|
if(head_check(newhead) == FALSE)
|
|
return (0);
|
|
|
|
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(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 const char * const modes[4] = { "Stereo", "Joint-Stereo", "Dual-Channel", "Single-Channel" };
|
|
static const char * const 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 const char * const modes[4] = { "stereo", "joint-stereo", "dual-channel", "mono" };
|
|
static const char * const 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;
|
|
}
|