diff options
Diffstat (limited to 'src/libmpg123/common.c')
| -rw-r--r-- | src/libmpg123/common.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/src/libmpg123/common.c b/src/libmpg123/common.c deleted file mode 100644 index e23508812..000000000 --- a/src/libmpg123/common.c +++ /dev/null @@ -1,183 +0,0 @@ -#include <ctype.h> -#include <stdlib.h> -#include <signal.h> - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> - -#include "mpg123.h" - -struct parameter mpg123_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 mpg123_bitindex; -unsigned char *mpg123_wordpointer; -unsigned char *pcm_sample; -int pcm_point = 0; - - -#define HDRCMPMASK 0xfffffd00 - -/* - * 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"); - abort(); - } - if(fr->mpeg25) { - fr->sampling_frequency = 6 + ((newhead>>10)&0x3); - } - else { - /*int dummy;*/ - fr->sampling_frequency = ((newhead>>10)&0x3) + (fr->lsf*3); - /* - dummy = (newhead>>10)&0x3; - switch (dummy) { - case 0: - fr->sample_rate = 44100; - break; - case 1: - fr->sample_rate = 48000; - break; - case 2: - fr->sample_rate = 32000; - break; - case 3: - fprintf (stderr, "invalid sampling rate\n"); - fr->sample_rate = 44100; - break; - }*/ - fr->sample_rate = freqs[fr->sampling_frequency]; - } - - 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: - 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; - break; - case 2: - fr->framesize = (long) tabsel_123[fr->lsf][1][fr->bitrate_index] * 144000; - fr->framesize /= freqs[fr->sampling_frequency]; - fr->framesize += fr->padding - 4; - break; - case 3: - 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; -} - -unsigned int getbits(int number_of_bits) -{ - unsigned long rval; - - if(!number_of_bits) - return 0; - - { - rval = mpg123_wordpointer[0]; - rval <<= 8; - rval |= mpg123_wordpointer[1]; - rval <<= 8; - rval |= mpg123_wordpointer[2]; - rval <<= mpg123_bitindex; - rval &= 0xffffff; - - mpg123_bitindex += number_of_bits; - - rval >>= (24-number_of_bits); - - mpg123_wordpointer += (mpg123_bitindex>>3); - mpg123_bitindex &= 7; - } - return rval; -} - -unsigned int getbits_fast(int number_of_bits) -{ - unsigned long rval; - - { - rval = mpg123_wordpointer[0]; - rval <<= 8; - rval |= mpg123_wordpointer[1]; - rval <<= mpg123_bitindex; - rval &= 0xffff; - mpg123_bitindex += number_of_bits; - - rval >>= (16-number_of_bits); - - mpg123_wordpointer += (mpg123_bitindex>>3); - mpg123_bitindex &= 7; - } - return rval; -} - -unsigned int get1bit(void) -{ - unsigned char rval; - rval = *mpg123_wordpointer << mpg123_bitindex; - - mpg123_bitindex++; - mpg123_wordpointer += (mpg123_bitindex>>3); - mpg123_bitindex &= 7; - - return rval>>7; -} |