ref: 6d726c2e024ac310553c8483f0db44a762d6a461
parent: e79f5009f833fbbe65b213c59e2e5c27e1ee1ce1
author: menno <menno>
date: Tue May 14 09:40:31 EDT 2002
Fixed a nasty bug in tns decoding
--- a/libfaad/tns.c
+++ b/libfaad/tns.c
@@ -16,7 +16,7 @@
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
-** $Id: tns.c,v 1.8 2002/03/27 19:09:29 menno Exp $
+** $Id: tns.c,v 1.9 2002/05/14 13:40:31 menno Exp $
**/
#include "common.h"
@@ -65,8 +65,9 @@
{inc = -1;
start = end - 1;
- } else
+ } else {inc = 1;
+ }
tns_ar_filter(&spec[(w*128)+start], size, inc, lpc, tns_order);
}
@@ -113,8 +114,9 @@
{inc = -1;
start = end - 1;
- } else
+ } else {inc = 1;
+ }
tns_ma_filter(&spec[(w*128)+start], size, inc, lpc, tns_order);
}
@@ -127,7 +129,6 @@
{uint8_t i, m;
uint8_t coef_res2, s_mask, n_mask;
- int8_t tmp[TNS_MAX_ORDER+1];
real_t tmp2[TNS_MAX_ORDER+1], b[TNS_MAX_ORDER+1];
real_t iqfac;
@@ -142,16 +143,17 @@
/* Conversion to signed integer */
for (i = 0; i < order; i++)
- tmp[i] = (coef[i] & s_mask) ? (coef[i] | n_mask) : coef[i];
+ {+ int8_t tmp = (coef[i] & s_mask) ? (coef[i] | n_mask) : coef[i];
- /* Inverse quantization */
- if (tmp[i] >= 0)
- iqfac = ((1 << (coef_res_bits-1)) - 0.5f) / M_PI_2;
- else
- iqfac = ((1 << (coef_res_bits-1)) + 0.5f) / M_PI_2;
+ /* Inverse quantization */
+ if (tmp >= 0)
+ iqfac = ((1 << (coef_res_bits-1)) - 0.5f) / M_PI_2;
+ else
+ iqfac = ((1 << (coef_res_bits-1)) + 0.5f) / M_PI_2;
- for (i = 0; i < order; i++)
- tmp2[i] = (real_t)sin(tmp[i] / iqfac);
+ tmp2[i] = (real_t)sin(tmp / iqfac);
+ }
/* Conversion to LPC coefficients */
a[0] = 1;