* ac3_downmix_c.c: ac3 downmix functions
*****************************************************************************
* Copyright (C) 1999, 2000, 2001 VideoLAN
+ * $Id: ac3_downmix_c.c,v 1.5 2001/04/20 12:14:34 reno Exp $
*
* Authors: Renaud Dartus <reno@videolan.org>
* Aaron Holtzman <aholtzma@engr.uvic.ca>
#include "defs.h"
-#include "int_types.h"
+#include "config.h"
+#include "common.h"
+#include "threads.h"
+#include "mtime.h"
+
+#include "stream_control.h"
+#include "input_ext-dec.h"
#include "ac3_decoder.h"
#include "ac3_internal.h"
#include "ac3_downmix.h"
void __inline__ downmix_3f_2r_to_2ch_c (float *samples, dm_par_t *dm_par)
{
- int i;
- float *left, *right, *center, *left_sur, *right_sur;
- float left_tmp, right_tmp;
+ int i;
+ float *left, *right, *center, *left_sur, *right_sur;
+ float left_tmp, right_tmp;
left = samples;
center = samples + 256;
left_sur = samples + 256*3;
right_sur = samples + 256*4;
- for (i=0; i < 256; i++) {
+ for (i=0; i < 256; i++) {
left_tmp = dm_par->unit * *left + dm_par->clev * *center + dm_par->slev * *left_sur++;
right_tmp = dm_par->unit * *right++ + dm_par->clev * *center + dm_par->slev * *right_sur++;
- *left++ = left_tmp;
- *center++ = right_tmp;
- }
+ *left++ = left_tmp;
+ *center++ = right_tmp;
+ }
}
void __inline__ downmix_2f_2r_to_2ch_c (float *samples, dm_par_t *dm_par)
{
- int i;
- float *left, *right, *left_sur, *right_sur;
- float left_tmp, right_tmp;
+ int i;
+ float *left, *right, *left_sur, *right_sur;
+ float left_tmp, right_tmp;
- left = &samples[0];
- right = &samples[256];
- left_sur = &samples[512];
- right_sur = &samples[768];
-
- for (i = 0; i < 256; i++) {
- left_tmp = dm_par->unit * *left + dm_par->slev * *left_sur++;
- right_tmp= dm_par->unit * *right + dm_par->slev * *right_sur++;
- *left++ = left_tmp;
- *right++ = right_tmp;
- }
+ left = &samples[0];
+ right = &samples[256];
+ left_sur = &samples[512];
+ right_sur = &samples[768];
+
+ for (i = 0; i < 256; i++) {
+ left_tmp = dm_par->unit * *left + dm_par->slev * *left_sur++;
+ right_tmp= dm_par->unit * *right + dm_par->slev * *right_sur++;
+ *left++ = left_tmp;
+ *right++ = right_tmp;
+ }
}
void __inline__ downmix_3f_1r_to_2ch_c (float *samples, dm_par_t *dm_par)
{
- int i;
- float *left, *right, *center, *right_sur;
- float left_tmp, right_tmp;
-
- left = &samples[0];
- right = &samples[512];
- center = &samples[256];
- right_sur = &samples[768];
-
- for (i = 0; i < 256; i++) {
- left_tmp = dm_par->unit * *left + dm_par->clev * *center - dm_par->slev * *right_sur;
- right_tmp= dm_par->unit * *right++ + dm_par->clev * *center + dm_par->slev * *right_sur++;
- *left++ = left_tmp;
- *center++ = right_tmp;
- }
+ int i;
+ float *left, *right, *center, *right_sur;
+ float left_tmp, right_tmp;
+
+ left = &samples[0];
+ right = &samples[512];
+ center = &samples[256];
+ right_sur = &samples[768];
+
+ for (i = 0; i < 256; i++) {
+ left_tmp = dm_par->unit * *left + dm_par->clev * *center - dm_par->slev * *right_sur;
+ right_tmp= dm_par->unit * *right++ + dm_par->clev * *center + dm_par->slev * *right_sur++;
+ *left++ = left_tmp;
+ *center++ = right_tmp;
+ }
}
void __inline__ downmix_2f_1r_to_2ch_c (float *samples, dm_par_t *dm_par)
{
- int i;
- float *left, *right, *right_sur;
- float left_tmp, right_tmp;
-
- left = &samples[0];
- right = &samples[256];
- right_sur = &samples[512];
-
- for (i = 0; i < 256; i++) {
- left_tmp = dm_par->unit * *left - dm_par->slev * *right_sur;
- right_tmp= dm_par->unit * *right + dm_par->slev * *right_sur++;
- *left++ = left_tmp;
- *right++ = right_tmp;
- }
+ int i;
+ float *left, *right, *right_sur;
+ float left_tmp, right_tmp;
+
+ left = &samples[0];
+ right = &samples[256];
+ right_sur = &samples[512];
+
+ for (i = 0; i < 256; i++) {
+ left_tmp = dm_par->unit * *left - dm_par->slev * *right_sur;
+ right_tmp= dm_par->unit * *right + dm_par->slev * *right_sur++;
+ *left++ = left_tmp;
+ *right++ = right_tmp;
+ }
}
void __inline__ downmix_3f_0r_to_2ch_c (float *samples, dm_par_t *dm_par)
{
- int i;
- float *left, *right, *center;
- float left_tmp, right_tmp;
-
- left = &samples[0];
- center = &samples[256];
- right = &samples[512];
-
- for (i = 0; i < 256; i++) {
- left_tmp = dm_par->unit * *left + dm_par->clev * *center;
- right_tmp= dm_par->unit * *right++ + dm_par->clev * *center;
- *left++ = left_tmp;
- *center++ = right_tmp;
- }
+ int i;
+ float *left, *right, *center;
+ float left_tmp, right_tmp;
+
+ left = &samples[0];
+ center = &samples[256];
+ right = &samples[512];
+
+ for (i = 0; i < 256; i++) {
+ left_tmp = dm_par->unit * *left + dm_par->clev * *center;
+ right_tmp= dm_par->unit * *right++ + dm_par->clev * *center;
+ *left++ = left_tmp;
+ *center++ = right_tmp;
+ }
}
void __inline__ stream_sample_2ch_to_s16_c (s16 *out_buf, float *left, float *right)
{
- int i;
- for (i=0; i < 256; i++) {
- *out_buf++ = (s16) (*left++ * NORM);
- *out_buf++ = (s16) (*right++ * NORM);
- }
+ int i;
+ for (i=0; i < 256; i++) {
+ *out_buf++ = (s16) (*left++ * NORM);
+ *out_buf++ = (s16) (*right++ * NORM);
+ }
}
void __inline__ stream_sample_1ch_to_s16_c (s16 *out_buf, float *center)
{
- int i;
- float tmp;
+ int i;
+ float tmp;
- for (i=0; i < 256; i++) {
- *out_buf++ = tmp = (s16) (0.7071f * *center++ * NORM);
- *out_buf++ = tmp;
- }
+ for (i=0; i < 256; i++) {
+ *out_buf++ = tmp = (s16) (0.7071f * *center++ * NORM);
+ *out_buf++ = tmp;
+ }
}
projects / vlc / blobdiff