diff options
Diffstat (limited to 'addons/mp3/decode_ntom.c')
| -rw-r--r-- | addons/mp3/decode_ntom.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/addons/mp3/decode_ntom.c b/addons/mp3/decode_ntom.c deleted file mode 100644 index e6b10a4c1..000000000 --- a/addons/mp3/decode_ntom.c +++ /dev/null @@ -1,219 +0,0 @@ -/* - * Mpeg Layer-1,2,3 audio decoder - * ------------------------------ - * copyright (c) 1995,1996,1997 by Michael Hipp, All rights reserved. - * See also 'README' - * - * N->M down/up sampling. Not optimized for speed. - */ - -#include "asterisk.h" -#include "asterisk/logger.h" -#include <stdlib.h> -#include <math.h> -#include <string.h> - -#include "mpg123.h" -#include "mpglib.h" - -#define WRITE_SAMPLE(samples,sum,clip) \ - if( (sum) > 32767.0) { *(samples) = 0x7fff; (clip)++; } \ - else if( (sum) < -32768.0) { *(samples) = -0x8000; (clip)++; } \ - else { *(samples) = sum; } - -#define NTOM_MUL (32768) -static unsigned long ntom_val[2] = { NTOM_MUL>>1,NTOM_MUL>>1 }; -static unsigned long ntom_step = NTOM_MUL; - - -int synth_ntom_set_step(long m,long n) -{ - if(param.verbose > 1) - ast_log(LOG_WARNING,"Init rate converter: %ld->%ld\n",m,n); - - if(n >= 96000 || m >= 96000 || m == 0 || n == 0) { - ast_log(LOG_WARNING,"NtoM converter: illegal rates\n"); - return (1); - } - - n *= NTOM_MUL; - ntom_step = n / m; - - if(ntom_step > 8*NTOM_MUL) { - ast_log(LOG_WARNING,"max. 1:8 conversion allowed!\n"); - return (1); - } - - ntom_val[0] = ntom_val[1] = NTOM_MUL>>1; - - return (0); - -} - - -int synth_ntom_mono (struct mpstr *mp, real *bandPtr,unsigned char *samples,int *pnt) -{ - short samples_tmp[8*64]; - short *tmp1 = samples_tmp; - int i,ret; - int pnt1 = 0; - - ret = synth_ntom(mp, bandPtr,0,(unsigned char *) samples_tmp,&pnt1); - samples += *pnt; - - for(i=0;i<(pnt1>>2);i++) { - *( (short *)samples) = *tmp1; - samples += 2; - tmp1 += 2; - } - *pnt += pnt1 >> 1; - - return ret; -} - - - -int synth_ntom(struct mpstr *mp, 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; - int ntom; - - bo = mp->synth_bo; - - if(!channel) { - bo--; - bo &= 0xf; - buf = mp->synth_buffs[0]; - ntom = ntom_val[1] = ntom_val[0]; - } - else { - samples++; - out += 2; /* to compute the right *pnt value */ - buf = mp->synth_buffs[1]; - ntom = ntom_val[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); - } - - mp->synth_bo = bo; - - { - register int j; - real *window = (mp->decwin) + 16 - bo1; - - for (j=16;j;j--,window+=0x10) - { - real sum; - - ntom += ntom_step; - if(ntom < NTOM_MUL) { - window += 16; - b0 += 16; - continue; - } - - sum = *window++ * *b0++; - sum -= *window++ * *b0++; - sum += *window++ * *b0++; - sum -= *window++ * *b0++; - sum += *window++ * *b0++; - sum -= *window++ * *b0++; - sum += *window++ * *b0++; - sum -= *window++ * *b0++; - sum += *window++ * *b0++; - sum -= *window++ * *b0++; - sum += *window++ * *b0++; - sum -= *window++ * *b0++; - sum += *window++ * *b0++; - sum -= *window++ * *b0++; - sum += *window++ * *b0++; - sum -= *window++ * *b0++; - - while(ntom >= NTOM_MUL) { - WRITE_SAMPLE(samples,sum,clip); - samples += step; - ntom -= NTOM_MUL; - } - } - - ntom += ntom_step; - if(ntom >= NTOM_MUL) - { - 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]; - - while(ntom >= NTOM_MUL) { - WRITE_SAMPLE(samples,sum,clip); - samples += step; - ntom -= NTOM_MUL; - } - } - - b0-=0x10,window-=0x20; - window += bo1<<1; - - for (j=15;j;j--,b0-=0x20,window-=0x10) - { - real sum; - - ntom += ntom_step; - if(ntom < NTOM_MUL) { - window -= 16; - b0 += 16; - continue; - } - - sum = -*(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - sum -= *(--window) * *b0++; - - while(ntom >= NTOM_MUL) { - WRITE_SAMPLE(samples,sum,clip); - samples += step; - ntom -= NTOM_MUL; - } - } - } - - ntom_val[channel] = ntom; - *pnt = ((unsigned char *) samples - out); - - return clip; -} - - |