fb_info *filter_bank_init(uint16_t frame_len)
{
uint16_t nshort = frame_len/8;
#ifdef LD_DEC
uint16_t frame_len_ld = frame_len/2;
#endif
fb_info *fb = (fb_info*)faad_malloc(sizeof(fb_info));
memset(fb, 0, sizeof(fb_info));
/* normal */
fb->mdct256 = faad_mdct_init(2*nshort);
fb->mdct2048 = faad_mdct_init(2*frame_len);
#ifdef LD_DEC
/* LD */
fb->mdct1024 = faad_mdct_init(2*frame_len_ld);
#endif
#ifdef ALLOW_SMALL_FRAMELENGTH
if (frame_len == 1024)
{
#endif
fb->long_window[0] = sine_long_1024;
fb->short_window[0] = sine_short_128;
fb->long_window[1] = kbd_long_1024;
fb->short_window[1] = kbd_short_128;
#ifdef LD_DEC
fb->ld_window[0] = sine_mid_512;
fb->ld_window[1] = ld_mid_512;
#endif
#ifdef ALLOW_SMALL_FRAMELENGTH
} else /* (frame_len == 960) */ {
fb->long_window[0] = sine_long_960;
fb->short_window[0] = sine_short_120;
fb->long_window[1] = kbd_long_960;
fb->short_window[1] = kbd_short_120;
#ifdef LD_DEC
fb->ld_window[0] = sine_mid_480;
fb->ld_window[1] = ld_mid_480;
#endif
}
#endif
#ifdef USE_SSE
if (cpu_has_sse())
{
fb->if_func = ifilter_bank_sse;
} else {
fb->if_func = ifilter_bank;
}
#endif
return fb;
}
fb_info *ssr_filter_bank_init(uint16_t frame_len)
{
uint16_t nshort = frame_len/8;
fb_info *fb = (fb_info*)faad_malloc(sizeof(fb_info));
memset(fb, 0, sizeof(fb_info));
/* normal */
fb->mdct256 = faad_mdct_init(2*nshort);
fb->mdct2048 = faad_mdct_init(2*frame_len);
fb->long_window[0] = sine_long_256;
fb->short_window[0] = sine_short_32;
fb->long_window[1] = kbd_long_256;
fb->short_window[1] = kbd_short_32;
return fb;
}
fb_info *filter_bank_init(uint16_t frame_len)
{
int32_t nshort = frame_len/8,i,j;
#ifdef LD_DEC
int32_t frame_len_ld = frame_len/2;
#endif
double phaseInc;
fb_info *fb = (fb_info*)malloc(sizeof(fb_info));
if(!fb)
return fb;
memset(fb, 0, sizeof(fb_info));
#ifdef USE_VORBIS_MDCT
if(!(nshort&31)){ // (nshort==64) || (nshort==128) || (nshort==256)
fb->mdct256 = oggdec_mdct_init(2*nshort);
if(!fb->mdct256)
goto err_out;
fb->mdct2048 = oggdec_mdct_init(2*frame_len);
if(!fb->mdct2048)
goto err_out;
#ifdef LD_DEC
fb->mdct1024 = oggdec_mdct_init(2*frame_len_ld);
if(!fb->mdct1024)
goto err_out;
#endif
fb->use_vorbis_mdct=1;
}else{
#else
fb->mdct256 = faad_mdct_init(2*nshort);
if(!fb->mdct256)
goto err_out;
fb->mdct2048 = faad_mdct_init(2*frame_len);
if(!fb->mdct2048)
goto err_out;
#ifdef LD_DEC
fb->mdct1024 = faad_mdct_init(2*frame_len_ld);
if(!fb->mdct1024)
goto err_out;
#endif
#endif
#ifdef USE_VORBIS_MDCT
}
#endif
fb->long_window[0]=(real_t *)malloc(frame_len*sizeof(real_t));
if(!fb->long_window[0])
goto err_out;
phaseInc = M_PI / (2.0f * frame_len);
for(i=0;i<frame_len;i++)
fb->long_window[0][i]=(real_t)sin(phaseInc * ((real_t)i + 0.5));
fb->short_window[0]=(real_t *)malloc(nshort*sizeof(real_t));
if(!fb->short_window[0])
goto err_out;
phaseInc = M_PI / (2.0f * nshort);
for(i=0;i<nshort;i++)
fb->short_window[0][i]=(real_t)sin(phaseInc * ((real_t)i + 0.5));
#ifdef LD_DEC
fb->ld_window[0]=(real_t *)malloc(frame_len_ld*sizeof(real_t));
if(!fb->ld_window[0])
goto err_out;
phaseInc = M_PI / (2.0f * frame_len_ld);
for(i=0;i<frame_len_ld;i++)
fb->ld_window[0][i]=(real_t)sin(phaseInc * ((real_t)i + 0.5));
fb->ld_window[1]=(real_t *)malloc(frame_len_ld*sizeof(real_t));
if(!fb->ld_window[1])
goto err_out;
j=0;
for(i=0;i<nshort*3/2;i++,j++)
fb->ld_window[1][j] = (real_t)0.0;
for(i=0;i<nshort ;i++,j++)
fb->ld_window[1][j] = fb->short_window[0][i];
for(i=0;i<nshort*3/2;i++,j++)
fb->ld_window[1][j] = (real_t)1.0;
#endif
if(frame_len == 1024){
fb->long_window[1] = kbd_long_1024;
fb->short_window[1] = kbd_short_128;
}else{ //(frame_len == 960)
fb->long_window[1] = kbd_long_960;
fb->short_window[1] = kbd_short_120;
}
fb->tmp_buf = (real_t*)malloc(2*frame_len*sizeof(real_t));
if(!fb->tmp_buf)
goto err_out;
return fb;
err_out:
filter_bank_end(fb);
free(fb);
return NULL;
}