static INLINE void imdct(fb_info *fb, real_t *in_data, real_t *out_data, uint16_t len)
{
mdct_info *mdct;
switch (len){
case 2048:
case 1920:mdct = fb->mdct2048;break;
case 256:
case 240:mdct = fb->mdct256;break;
#ifdef LD_DEC
case 1024:
case 960:mdct = fb->mdct1024;break;
#endif
}
#ifdef USE_VORBIS_MDCT
if(fb->use_vorbis_mdct){
int32_t i=len/2;
double divisor=1.0/(float)i;
for(i=0;i<len/2;i++)
in_data[i] *= divisor;
oggdec_mdct_backward((mdct_lookup *)mdct, in_data, out_data);
}else
#endif
faad_imdct(mdct, in_data, out_data);
}
static INLINE void imdct_long(fb_info *fb, real_t *in_data, real_t *out_data, uint16_t len)
{
#ifdef LD_DEC
mdct_info *mdct = NULL;
switch (len)
{
case 2048:
case 1920:
mdct = fb->mdct2048;
break;
case 1024:
case 960:
mdct = fb->mdct1024;
break;
}
faad_imdct(mdct, in_data, out_data);
#else
faad_imdct(fb->mdct2048, in_data, out_data);
#endif
}
static INLINE void imdct_ssr(fb_info *fb, real_t *in_data,
real_t *out_data, uint16_t len)
{
mdct_info *mdct;
switch (len)
{
case 512:
mdct = fb->mdct2048;
break;
case 64:
mdct = fb->mdct256;
break;
}
faad_imdct(mdct, in_data, out_data);
}
void ifilter_bank(fb_info *fb, uint8_t window_sequence, uint8_t window_shape,
uint8_t window_shape_prev, real_t *freq_in,
real_t *time_out, real_t *overlap,
uint8_t object_type, uint16_t frame_len)
{
int16_t i;
ALIGN real_t transf_buf[2*1024] = {0};
const real_t *window_long = NULL;
const real_t *window_long_prev = NULL;
const real_t *window_short = NULL;
const real_t *window_short_prev = NULL;
uint16_t nlong = frame_len;
uint16_t nshort = frame_len/8;
uint16_t trans = nshort/2;
uint16_t nflat_ls = (nlong-nshort)/2;
#ifdef PROFILE
int64_t count = faad_get_ts();
#endif
#ifdef LD_DEC
if (object_type == LD)
{
window_long = fb->ld_window[window_shape];
window_long_prev = fb->ld_window[window_shape_prev];
} else {
#endif
window_long = fb->long_window[window_shape];
window_long_prev = fb->long_window[window_shape_prev];
window_short = fb->short_window[window_shape];
window_short_prev = fb->short_window[window_shape_prev];
#ifdef LD_DEC
}
#endif
switch (window_sequence)
{
case ONLY_LONG_SEQUENCE:
imdct_long(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i < nlong; i+=4)
{
time_out[i] = overlap[i] + MUL_F(transf_buf[i],window_long_prev[i]);
time_out[i+1] = overlap[i+1] + MUL_F(transf_buf[i+1],window_long_prev[i+1]);
time_out[i+2] = overlap[i+2] + MUL_F(transf_buf[i+2],window_long_prev[i+2]);
time_out[i+3] = overlap[i+3] + MUL_F(transf_buf[i+3],window_long_prev[i+3]);
}
for (i = 0; i < nlong; i+=4)
{
overlap[i] = MUL_F(transf_buf[nlong+i],window_long[nlong-1-i]);
overlap[i+1] = MUL_F(transf_buf[nlong+i+1],window_long[nlong-2-i]);
overlap[i+2] = MUL_F(transf_buf[nlong+i+2],window_long[nlong-3-i]);
overlap[i+3] = MUL_F(transf_buf[nlong+i+3],window_long[nlong-4-i]);
}
break;
case LONG_START_SEQUENCE:
imdct_long(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i < nlong; i+=4)
{
time_out[i] = overlap[i] + MUL_F(transf_buf[i],window_long_prev[i]);
time_out[i+1] = overlap[i+1] + MUL_F(transf_buf[i+1],window_long_prev[i+1]);
time_out[i+2] = overlap[i+2] + MUL_F(transf_buf[i+2],window_long_prev[i+2]);
time_out[i+3] = overlap[i+3] + MUL_F(transf_buf[i+3],window_long_prev[i+3]);
}
for (i = 0; i < nflat_ls; i++)
overlap[i] = transf_buf[nlong+i];
for (i = 0; i < nshort; i++)
overlap[nflat_ls+i] = MUL_F(transf_buf[nlong+nflat_ls+i],window_short[nshort-i-1]);
for (i = 0; i < nflat_ls; i++)
overlap[nflat_ls+nshort+i] = 0;
break;
case EIGHT_SHORT_SEQUENCE:
faad_imdct(fb->mdct256, freq_in+0*nshort, transf_buf+2*nshort*0);
faad_imdct(fb->mdct256, freq_in+1*nshort, transf_buf+2*nshort*1);
faad_imdct(fb->mdct256, freq_in+2*nshort, transf_buf+2*nshort*2);
faad_imdct(fb->mdct256, freq_in+3*nshort, transf_buf+2*nshort*3);
faad_imdct(fb->mdct256, freq_in+4*nshort, transf_buf+2*nshort*4);
faad_imdct(fb->mdct256, freq_in+5*nshort, transf_buf+2*nshort*5);
faad_imdct(fb->mdct256, freq_in+6*nshort, transf_buf+2*nshort*6);
faad_imdct(fb->mdct256, freq_in+7*nshort, transf_buf+2*nshort*7);
for (i = 0; i < nflat_ls; i++)
time_out[i] = overlap[i];
for(i = 0; i < nshort; i++)
{
time_out[nflat_ls+ i] = overlap[nflat_ls+ i] + MUL_F(transf_buf[nshort*0+i],window_short_prev[i]);
time_out[nflat_ls+1*nshort+i] = overlap[nflat_ls+nshort*1+i] + MUL_F(transf_buf[nshort*1+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*2+i],window_short[i]);
time_out[nflat_ls+2*nshort+i] = overlap[nflat_ls+nshort*2+i] + MUL_F(transf_buf[nshort*3+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*4+i],window_short[i]);
time_out[nflat_ls+3*nshort+i] = overlap[nflat_ls+nshort*3+i] + MUL_F(transf_buf[nshort*5+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*6+i],window_short[i]);
if (i < trans)
time_out[nflat_ls+4*nshort+i] = overlap[nflat_ls+nshort*4+i] + MUL_F(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*8+i],window_short[i]);
}
for(i = 0; i < nshort; i++)
{
if (i >= trans)
overlap[nflat_ls+4*nshort+i-nlong] = MUL_F(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*8+i],window_short[i]);
overlap[nflat_ls+5*nshort+i-nlong] = MUL_F(transf_buf[nshort*9+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*10+i],window_short[i]);
overlap[nflat_ls+6*nshort+i-nlong] = MUL_F(transf_buf[nshort*11+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*12+i],window_short[i]);
overlap[nflat_ls+7*nshort+i-nlong] = MUL_F(transf_buf[nshort*13+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*14+i],window_short[i]);
overlap[nflat_ls+8*nshort+i-nlong] = MUL_F(transf_buf[nshort*15+i],window_short[nshort-1-i]);
}
for (i = 0; i < nflat_ls; i++)
overlap[nflat_ls+nshort+i] = 0;
break;
case LONG_STOP_SEQUENCE:
imdct_long(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i < nflat_ls; i++)
time_out[i] = overlap[i];
for (i = 0; i < nshort; i++)
time_out[nflat_ls+i] = overlap[nflat_ls+i] + MUL_F(transf_buf[nflat_ls+i],window_short_prev[i]);
for (i = 0; i < nflat_ls; i++)
time_out[nflat_ls+nshort+i] = overlap[nflat_ls+nshort+i] + transf_buf[nflat_ls+nshort+i];
for (i = 0; i < nlong; i++)
overlap[i] = MUL_F(transf_buf[nlong+i],window_long[nlong-1-i]);
break;
}
#ifdef PROFILE
count = faad_get_ts() - count;
fb->cycles += count;
#endif
}
void ifilter_bank(fb_info *fb, uint8_t window_sequence, uint8_t window_shape,
uint8_t window_shape_prev, real_t *freq_in,
real_t *time_out, real_t *overlap,
uint8_t object_type, uint16_t frame_len)
{
int16_t i;
ALIGN real_t transf_buf[2*1024] = {0};
const real_t *window_long = NULL;
const real_t *window_long_prev = NULL;
const real_t *window_short = NULL;
const real_t *window_short_prev = NULL;
uint16_t nlong = frame_len;
uint16_t nshort = frame_len/8;
uint16_t trans = nshort/2;
uint16_t nflat_ls = (nlong-nshort)/2;
#ifdef PROFILE
int64_t count = faad_get_ts();
#endif
/* select windows of current frame and previous frame (Sine or KBD) */
#ifdef LD_DEC
if (object_type == LD)
{
window_long = fb->ld_window[window_shape];
window_long_prev = fb->ld_window[window_shape_prev];
} else {
#endif
window_long = fb->long_window[window_shape];
window_long_prev = fb->long_window[window_shape_prev];
window_short = fb->short_window[window_shape];
window_short_prev = fb->short_window[window_shape_prev];
#ifdef LD_DEC
}
#endif
#if 0
for (i = 0; i < 1024; i++)
{
printf("%d\n", freq_in[i]);
}
#endif
#if 0
printf("%d %d\n", window_sequence, window_shape);
#endif
switch (window_sequence)
{
case ONLY_LONG_SEQUENCE:
/* perform iMDCT */
imdct_long(fb, freq_in, transf_buf, 2*nlong);
/* add second half output of previous frame to windowed output of current frame */
for (i = 0; i < nlong; i+=4)
{
time_out[i] = overlap[i] + MUL_F(transf_buf[i],window_long_prev[i]);
time_out[i+1] = overlap[i+1] + MUL_F(transf_buf[i+1],window_long_prev[i+1]);
time_out[i+2] = overlap[i+2] + MUL_F(transf_buf[i+2],window_long_prev[i+2]);
time_out[i+3] = overlap[i+3] + MUL_F(transf_buf[i+3],window_long_prev[i+3]);
}
/* window the second half and save as overlap for next frame */
for (i = 0; i < nlong; i+=4)
{
overlap[i] = MUL_F(transf_buf[nlong+i],window_long[nlong-1-i]);
overlap[i+1] = MUL_F(transf_buf[nlong+i+1],window_long[nlong-2-i]);
overlap[i+2] = MUL_F(transf_buf[nlong+i+2],window_long[nlong-3-i]);
overlap[i+3] = MUL_F(transf_buf[nlong+i+3],window_long[nlong-4-i]);
}
break;
case LONG_START_SEQUENCE:
/* perform iMDCT */
imdct_long(fb, freq_in, transf_buf, 2*nlong);
/* add second half output of previous frame to windowed output of current frame */
for (i = 0; i < nlong; i+=4)
{
time_out[i] = overlap[i] + MUL_F(transf_buf[i],window_long_prev[i]);
time_out[i+1] = overlap[i+1] + MUL_F(transf_buf[i+1],window_long_prev[i+1]);
time_out[i+2] = overlap[i+2] + MUL_F(transf_buf[i+2],window_long_prev[i+2]);
time_out[i+3] = overlap[i+3] + MUL_F(transf_buf[i+3],window_long_prev[i+3]);
}
/* window the second half and save as overlap for next frame */
/* construct second half window using padding with 1's and 0's */
for (i = 0; i < nflat_ls; i++)
overlap[i] = transf_buf[nlong+i];
for (i = 0; i < nshort; i++)
overlap[nflat_ls+i] = MUL_F(transf_buf[nlong+nflat_ls+i],window_short[nshort-i-1]);
for (i = 0; i < nflat_ls; i++)
overlap[nflat_ls+nshort+i] = 0;
break;
case EIGHT_SHORT_SEQUENCE:
/* perform iMDCT for each short block */
faad_imdct(fb->mdct256, freq_in+0*nshort, transf_buf+2*nshort*0);
faad_imdct(fb->mdct256, freq_in+1*nshort, transf_buf+2*nshort*1);
faad_imdct(fb->mdct256, freq_in+2*nshort, transf_buf+2*nshort*2);
faad_imdct(fb->mdct256, freq_in+3*nshort, transf_buf+2*nshort*3);
faad_imdct(fb->mdct256, freq_in+4*nshort, transf_buf+2*nshort*4);
faad_imdct(fb->mdct256, freq_in+5*nshort, transf_buf+2*nshort*5);
faad_imdct(fb->mdct256, freq_in+6*nshort, transf_buf+2*nshort*6);
faad_imdct(fb->mdct256, freq_in+7*nshort, transf_buf+2*nshort*7);
/* add second half output of previous frame to windowed output of current frame */
for (i = 0; i < nflat_ls; i++)
time_out[i] = overlap[i];
for(i = 0; i < nshort; i++)
{
time_out[nflat_ls+ i] = overlap[nflat_ls+ i] + MUL_F(transf_buf[nshort*0+i],window_short_prev[i]);
time_out[nflat_ls+1*nshort+i] = overlap[nflat_ls+nshort*1+i] + MUL_F(transf_buf[nshort*1+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*2+i],window_short[i]);
time_out[nflat_ls+2*nshort+i] = overlap[nflat_ls+nshort*2+i] + MUL_F(transf_buf[nshort*3+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*4+i],window_short[i]);
time_out[nflat_ls+3*nshort+i] = overlap[nflat_ls+nshort*3+i] + MUL_F(transf_buf[nshort*5+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*6+i],window_short[i]);
if (i < trans)
time_out[nflat_ls+4*nshort+i] = overlap[nflat_ls+nshort*4+i] + MUL_F(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*8+i],window_short[i]);
}
/* window the second half and save as overlap for next frame */
for(i = 0; i < nshort; i++)
{
if (i >= trans)
overlap[nflat_ls+4*nshort+i-nlong] = MUL_F(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*8+i],window_short[i]);
overlap[nflat_ls+5*nshort+i-nlong] = MUL_F(transf_buf[nshort*9+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*10+i],window_short[i]);
overlap[nflat_ls+6*nshort+i-nlong] = MUL_F(transf_buf[nshort*11+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*12+i],window_short[i]);
overlap[nflat_ls+7*nshort+i-nlong] = MUL_F(transf_buf[nshort*13+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*14+i],window_short[i]);
overlap[nflat_ls+8*nshort+i-nlong] = MUL_F(transf_buf[nshort*15+i],window_short[nshort-1-i]);
}
for (i = 0; i < nflat_ls; i++)
overlap[nflat_ls+nshort+i] = 0;
break;
case LONG_STOP_SEQUENCE:
/* perform iMDCT */
imdct_long(fb, freq_in, transf_buf, 2*nlong);
/* add second half output of previous frame to windowed output of current frame */
/* construct first half window using padding with 1's and 0's */
for (i = 0; i < nflat_ls; i++)
time_out[i] = overlap[i];
for (i = 0; i < nshort; i++)
time_out[nflat_ls+i] = overlap[nflat_ls+i] + MUL_F(transf_buf[nflat_ls+i],window_short_prev[i]);
for (i = 0; i < nflat_ls; i++)
time_out[nflat_ls+nshort+i] = overlap[nflat_ls+nshort+i] + transf_buf[nflat_ls+nshort+i];
/* window the second half and save as overlap for next frame */
for (i = 0; i < nlong; i++)
overlap[i] = MUL_F(transf_buf[nlong+i],window_long[nlong-1-i]);
break;
}
#if 0
for (i = 0; i < 1024; i++)
{
printf("%d\n", time_out[i]);
//printf("0x%.8X\n", time_out[i]);
}
#endif
#ifdef PROFILE
count = faad_get_ts() - count;
fb->cycles += count;
#endif
}
