diff options
Diffstat (limited to 'faad2/src/libfaad/filtbank.c')
| -rw-r--r-- | faad2/src/libfaad/filtbank.c | 406 |
1 files changed, 0 insertions, 406 deletions
diff --git a/faad2/src/libfaad/filtbank.c b/faad2/src/libfaad/filtbank.c deleted file mode 100644 index 1d8b6a4..0000000 --- a/faad2/src/libfaad/filtbank.c +++ /dev/null @@ -1,406 +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: filtbank.c,v 1.46 2009/01/26 23:51:15 menno Exp $
-**/
-
-#include "common.h"
-#include "structs.h"
-
-#include <stdlib.h>
-#include <string.h>
-#ifdef _WIN32_WCE
-#define assert(x)
-#else
-#include <assert.h>
-#endif
-
-#include "filtbank.h"
-#include "syntax.h"
-#include "kbd_win.h"
-#include "sine_win.h"
-#include "mdct.h"
-
-
-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
-
- return fb;
-}
-
-void filter_bank_end(fb_info *fb)
-{
- if (fb != NULL)
- {
-#ifdef PROFILE
- printf("FB: %I64d cycles\n", fb->cycles);
-#endif
-
- faad_mdct_end(fb->mdct256);
- faad_mdct_end(fb->mdct2048);
-#ifdef LD_DEC
- faad_mdct_end(fb->mdct1024);
-#endif
-
- faad_free(fb);
- }
-}
-
-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
-}
-
-
-#ifdef LTP_DEC
-static INLINE void mdct(fb_info *fb, real_t *in_data, real_t *out_data, uint16_t len)
-{
- mdct_info *mdct = NULL;
-
- 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
- }
-
- faad_mdct(mdct, in_data, out_data);
-}
-#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
-}
-
-
-#ifdef LTP_DEC
-/* only works for LTP -> no overlapping, no short blocks */
-void filter_bank_ltp(fb_info *fb, uint8_t window_sequence, uint8_t window_shape,
- uint8_t window_shape_prev, real_t *in_data, real_t *out_mdct,
- uint8_t object_type, uint16_t frame_len)
-{
- int16_t i;
- ALIGN real_t windowed_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 nflat_ls = (nlong-nshort)/2;
-
- assert(window_sequence != EIGHT_SHORT_SEQUENCE);
-
-#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:
- for (i = nlong-1; i >= 0; i--)
- {
- windowed_buf[i] = MUL_F(in_data[i], window_long_prev[i]);
- windowed_buf[i+nlong] = MUL_F(in_data[i+nlong], window_long[nlong-1-i]);
- }
- mdct(fb, windowed_buf, out_mdct, 2*nlong);
- break;
-
- case LONG_START_SEQUENCE:
- for (i = 0; i < nlong; i++)
- windowed_buf[i] = MUL_F(in_data[i], window_long_prev[i]);
- for (i = 0; i < nflat_ls; i++)
- windowed_buf[i+nlong] = in_data[i+nlong];
- for (i = 0; i < nshort; i++)
- windowed_buf[i+nlong+nflat_ls] = MUL_F(in_data[i+nlong+nflat_ls], window_short[nshort-1-i]);
- for (i = 0; i < nflat_ls; i++)
- windowed_buf[i+nlong+nflat_ls+nshort] = 0;
- mdct(fb, windowed_buf, out_mdct, 2*nlong);
- break;
-
- case LONG_STOP_SEQUENCE:
- for (i = 0; i < nflat_ls; i++)
- windowed_buf[i] = 0;
- for (i = 0; i < nshort; i++)
- windowed_buf[i+nflat_ls] = MUL_F(in_data[i+nflat_ls], window_short_prev[i]);
- for (i = 0; i < nflat_ls; i++)
- windowed_buf[i+nflat_ls+nshort] = in_data[i+nflat_ls+nshort];
- for (i = 0; i < nlong; i++)
- windowed_buf[i+nlong] = MUL_F(in_data[i+nlong], window_long[nlong-1-i]);
- mdct(fb, windowed_buf, out_mdct, 2*nlong);
- break;
- }
-}
-#endif
|