summaryrefslogtreecommitdiff
path: root/faad2/src/libfaad/ssr_fb.c
diff options
context:
space:
mode:
Diffstat (limited to 'faad2/src/libfaad/ssr_fb.c')
-rw-r--r--faad2/src/libfaad/ssr_fb.c185
1 files changed, 0 insertions, 185 deletions
diff --git a/faad2/src/libfaad/ssr_fb.c b/faad2/src/libfaad/ssr_fb.c
deleted file mode 100644
index ebdcf68..0000000
--- a/faad2/src/libfaad/ssr_fb.c
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
-** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
-** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
-**
-** This program is free software; you can redistribute it and/or modify
-** it under the terms of the GNU General Public License as published by
-** the Free Software Foundation; either version 2 of the License, or
-** (at your option) any later version.
-**
-** This program 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 General Public License for more details.
-**
-** You should have received a copy of the GNU General Public License
-** along with this program; if not, write to the Free Software
-** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-**
-** Any non-GPL usage of this software or parts of this software is strictly
-** forbidden.
-**
-** The "appropriate copyright message" mentioned in section 2c of the GPLv2
-** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
-**
-** Commercial non-GPL licensing of this software is possible.
-** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
-**
-** $Id: ssr_fb.c,v 1.17 2007/11/01 12:33:36 menno Exp $
-**/
-
-#include "common.h"
-#include "structs.h"
-
-#ifdef SSR_DEC
-
-#include <string.h>
-#include <stdlib.h>
-#include "syntax.h"
-#include "filtbank.h"
-#include "mdct.h"
-#include "ssr_fb.h"
-#include "ssr_win.h"
-
-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;
-}
-
-void ssr_filter_bank_end(fb_info *fb)
-{
- faad_mdct_end(fb->mdct256);
- faad_mdct_end(fb->mdct2048);
-
- if (fb) faad_free(fb);
-}
-
-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);
-}
-
-/* NON-overlapping inverse filterbank for use with SSR */
-void ssr_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, uint16_t frame_len)
-{
- int16_t i;
- real_t *transf_buf;
-
- real_t *window_long;
- real_t *window_long_prev;
- real_t *window_short;
- real_t *window_short_prev;
-
- uint16_t nlong = frame_len;
- uint16_t nshort = frame_len/8;
- uint16_t trans = nshort/2;
-
- uint16_t nflat_ls = (nlong-nshort)/2;
-
- transf_buf = (real_t*)faad_malloc(2*nlong*sizeof(real_t));
-
- 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];
-
- switch (window_sequence)
- {
- case ONLY_LONG_SEQUENCE:
- imdct_ssr(fb, freq_in, transf_buf, 2*nlong);
- for (i = nlong-1; i >= 0; i--)
- {
- time_out[i] = MUL_R_C(transf_buf[i],window_long_prev[i]);
- time_out[nlong+i] = MUL_R_C(transf_buf[nlong+i],window_long[nlong-1-i]);
- }
- break;
-
- case LONG_START_SEQUENCE:
- imdct_ssr(fb, freq_in, transf_buf, 2*nlong);
- for (i = 0; i < nlong; i++)
- time_out[i] = MUL_R_C(transf_buf[i],window_long_prev[i]);
- for (i = 0; i < nflat_ls; i++)
- time_out[nlong+i] = transf_buf[nlong+i];
- for (i = 0; i < nshort; i++)
- time_out[nlong+nflat_ls+i] = MUL_R_C(transf_buf[nlong+nflat_ls+i],window_short[nshort-i-1]);
- for (i = 0; i < nflat_ls; i++)
- time_out[nlong+nflat_ls+nshort+i] = 0;
- break;
-
- case EIGHT_SHORT_SEQUENCE:
- imdct_ssr(fb, freq_in+0*nshort, transf_buf+2*nshort*0, 2*nshort);
- imdct_ssr(fb, freq_in+1*nshort, transf_buf+2*nshort*1, 2*nshort);
- imdct_ssr(fb, freq_in+2*nshort, transf_buf+2*nshort*2, 2*nshort);
- imdct_ssr(fb, freq_in+3*nshort, transf_buf+2*nshort*3, 2*nshort);
- imdct_ssr(fb, freq_in+4*nshort, transf_buf+2*nshort*4, 2*nshort);
- imdct_ssr(fb, freq_in+5*nshort, transf_buf+2*nshort*5, 2*nshort);
- imdct_ssr(fb, freq_in+6*nshort, transf_buf+2*nshort*6, 2*nshort);
- imdct_ssr(fb, freq_in+7*nshort, transf_buf+2*nshort*7, 2*nshort);
- for(i = nshort-1; i >= 0; i--)
- {
- time_out[i+0*nshort] = MUL_R_C(transf_buf[nshort*0+i],window_short_prev[i]);
- time_out[i+1*nshort] = MUL_R_C(transf_buf[nshort*1+i],window_short[i]);
- time_out[i+2*nshort] = MUL_R_C(transf_buf[nshort*2+i],window_short_prev[i]);
- time_out[i+3*nshort] = MUL_R_C(transf_buf[nshort*3+i],window_short[i]);
- time_out[i+4*nshort] = MUL_R_C(transf_buf[nshort*4+i],window_short_prev[i]);
- time_out[i+5*nshort] = MUL_R_C(transf_buf[nshort*5+i],window_short[i]);
- time_out[i+6*nshort] = MUL_R_C(transf_buf[nshort*6+i],window_short_prev[i]);
- time_out[i+7*nshort] = MUL_R_C(transf_buf[nshort*7+i],window_short[i]);
- time_out[i+8*nshort] = MUL_R_C(transf_buf[nshort*8+i],window_short_prev[i]);
- time_out[i+9*nshort] = MUL_R_C(transf_buf[nshort*9+i],window_short[i]);
- time_out[i+10*nshort] = MUL_R_C(transf_buf[nshort*10+i],window_short_prev[i]);
- time_out[i+11*nshort] = MUL_R_C(transf_buf[nshort*11+i],window_short[i]);
- time_out[i+12*nshort] = MUL_R_C(transf_buf[nshort*12+i],window_short_prev[i]);
- time_out[i+13*nshort] = MUL_R_C(transf_buf[nshort*13+i],window_short[i]);
- time_out[i+14*nshort] = MUL_R_C(transf_buf[nshort*14+i],window_short_prev[i]);
- time_out[i+15*nshort] = MUL_R_C(transf_buf[nshort*15+i],window_short[i]);
- }
- break;
-
- case LONG_STOP_SEQUENCE:
- imdct_ssr(fb, freq_in, transf_buf, 2*nlong);
- for (i = 0; i < nflat_ls; i++)
- time_out[i] = 0;
- for (i = 0; i < nshort; i++)
- time_out[nflat_ls+i] = MUL_R_C(transf_buf[nflat_ls+i],window_short_prev[i]);
- for (i = 0; i < nflat_ls; i++)
- time_out[nflat_ls+nshort+i] = transf_buf[nflat_ls+nshort+i];
- for (i = 0; i < nlong; i++)
- time_out[nlong+i] = MUL_R_C(transf_buf[nlong+i],window_long[nlong-1-i]);
- break;
- }
-
- faad_free(transf_buf);
-}
-
-
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 02:43:57 +0000