diff options
Diffstat (limited to 'media/libstagefright/codecs/amrwbenc/src/int_lpc.c')
| -rw-r--r-- | media/libstagefright/codecs/amrwbenc/src/int_lpc.c | 132 |
1 files changed, 66 insertions, 66 deletions
diff --git a/media/libstagefright/codecs/amrwbenc/src/int_lpc.c b/media/libstagefright/codecs/amrwbenc/src/int_lpc.c index be1fd0b..88285e8 100644 --- a/media/libstagefright/codecs/amrwbenc/src/int_lpc.c +++ b/media/libstagefright/codecs/amrwbenc/src/int_lpc.c @@ -1,66 +1,66 @@ -/*
- ** Copyright 2003-2010, VisualOn, Inc.
- **
- ** Licensed under the Apache License, Version 2.0 (the "License");
- ** you may not use this file except in compliance with the License.
- ** You may obtain a copy of the License at
- **
- ** http://www.apache.org/licenses/LICENSE-2.0
- **
- ** Unless required by applicable law or agreed to in writing, software
- ** distributed under the License is distributed on an "AS IS" BASIS,
- ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- ** See the License for the specific language governing permissions and
- ** limitations under the License.
- */
-
-/***********************************************************************
-* File: int_lpc.c *
-* *
-* Description:Interpolation of the LP parameters in 4 subframes. *
-* *
-************************************************************************/
-
-#include "typedef.h"
-#include "basic_op.h"
-#include "cnst.h"
-#include "acelp.h"
-
-#define MP1 (M+1)
-
-
-void Int_isp(
- Word16 isp_old[], /* input : isps from past frame */
- Word16 isp_new[], /* input : isps from present frame */
- Word16 frac[], /* input : fraction for 3 first subfr (Q15) */
- Word16 Az[] /* output: LP coefficients in 4 subframes */
- )
-{
- Word32 i, k;
- Word16 fac_old, fac_new;
- Word16 isp[M];
- Word32 L_tmp;
-
- for (k = 0; k < 3; k++)
- {
- fac_new = frac[k];
- fac_old = (32767 - fac_new) + 1; /* 1.0 - fac_new */
-
- for (i = 0; i < M; i++)
- {
- L_tmp = (isp_old[i] * fac_old)<<1;
- L_tmp += (isp_new[i] * fac_new)<<1;
- isp[i] = (L_tmp + 0x8000)>>16;
- }
- Isp_Az(isp, Az, M, 0);
- Az += MP1;
- }
-
- /* 4th subframe: isp_new (frac=1.0) */
- Isp_Az(isp_new, Az, M, 0);
-
- return;
-}
-
-
-
+/* + ** Copyright 2003-2010, VisualOn, Inc. + ** + ** Licensed under the Apache License, Version 2.0 (the "License"); + ** you may not use this file except in compliance with the License. + ** You may obtain a copy of the License at + ** + ** http://www.apache.org/licenses/LICENSE-2.0 + ** + ** Unless required by applicable law or agreed to in writing, software + ** distributed under the License is distributed on an "AS IS" BASIS, + ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + ** See the License for the specific language governing permissions and + ** limitations under the License. + */ + +/*********************************************************************** +* File: int_lpc.c * +* * +* Description:Interpolation of the LP parameters in 4 subframes. * +* * +************************************************************************/ + +#include "typedef.h" +#include "basic_op.h" +#include "cnst.h" +#include "acelp.h" + +#define MP1 (M+1) + + +void Int_isp( + Word16 isp_old[], /* input : isps from past frame */ + Word16 isp_new[], /* input : isps from present frame */ + Word16 frac[], /* input : fraction for 3 first subfr (Q15) */ + Word16 Az[] /* output: LP coefficients in 4 subframes */ + ) +{ + Word32 i, k; + Word16 fac_old, fac_new; + Word16 isp[M]; + Word32 L_tmp; + + for (k = 0; k < 3; k++) + { + fac_new = frac[k]; + fac_old = (32767 - fac_new) + 1; /* 1.0 - fac_new */ + + for (i = 0; i < M; i++) + { + L_tmp = (isp_old[i] * fac_old)<<1; + L_tmp += (isp_new[i] * fac_new)<<1; + isp[i] = (L_tmp + 0x8000)>>16; + } + Isp_Az(isp, Az, M, 0); + Az += MP1; + } + + /* 4th subframe: isp_new (frac=1.0) */ + Isp_Az(isp_new, Az, M, 0); + + return; +} + + + |