diff options
Diffstat (limited to 'media/libstagefright/codecs/amrwbenc/src/convolve.c')
| -rw-r--r-- | media/libstagefright/codecs/amrwbenc/src/convolve.c | 218 |
1 files changed, 109 insertions, 109 deletions
diff --git a/media/libstagefright/codecs/amrwbenc/src/convolve.c b/media/libstagefright/codecs/amrwbenc/src/convolve.c index 66c74d6..4f7fd8a 100644 --- a/media/libstagefright/codecs/amrwbenc/src/convolve.c +++ b/media/libstagefright/codecs/amrwbenc/src/convolve.c @@ -1,109 +1,109 @@ -/*
- ** 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: convolve.c
-
- Description:Perform the convolution between two vectors x[] and h[]
- and write the result in the vector y[]
-
-************************************************************************/
-
-#include "typedef.h"
-#include "basic_op.h"
-
-void Convolve (
- Word16 x[], /* (i) : input vector */
- Word16 h[], /* (i) : impulse response */
- Word16 y[], /* (o) : output vector */
- Word16 L /* (i) : vector size */
- )
-{
- Word32 i, n;
- Word16 *tmpH,*tmpX;
- Word32 s;
- for (n = 0; n < 64;)
- {
- tmpH = h+n;
- tmpX = x;
- i=n+1;
- s = vo_mult32((*tmpX++), (*tmpH--));i--;
- while(i>0)
- {
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- i -= 4;
- }
- y[n] = ((s<<1) + 0x8000)>>16;
- n++;
-
- tmpH = h+n;
- tmpX = x;
- i=n+1;
- s = vo_mult32((*tmpX++), (*tmpH--));i--;
- s += vo_mult32((*tmpX++), (*tmpH--));i--;
-
- while(i>0)
- {
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- i -= 4;
- }
- y[n] = ((s<<1) + 0x8000)>>16;
- n++;
-
- tmpH = h+n;
- tmpX = x;
- i=n+1;
- s = vo_mult32((*tmpX++), (*tmpH--));i--;
- s += vo_mult32((*tmpX++), (*tmpH--));i--;
- s += vo_mult32((*tmpX++), (*tmpH--));i--;
-
- while(i>0)
- {
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- i -= 4;
- }
- y[n] = ((s<<1) + 0x8000)>>16;
- n++;
-
- s = 0;
- tmpH = h+n;
- tmpX = x;
- i=n+1;
- while(i>0)
- {
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- s += vo_mult32((*tmpX++), (*tmpH--));
- i -= 4;
- }
- y[n] = ((s<<1) + 0x8000)>>16;
- n++;
- }
- 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: convolve.c + + Description:Perform the convolution between two vectors x[] and h[] + and write the result in the vector y[] + +************************************************************************/ + +#include "typedef.h" +#include "basic_op.h" + +void Convolve ( + Word16 x[], /* (i) : input vector */ + Word16 h[], /* (i) : impulse response */ + Word16 y[], /* (o) : output vector */ + Word16 L /* (i) : vector size */ + ) +{ + Word32 i, n; + Word16 *tmpH,*tmpX; + Word32 s; + for (n = 0; n < 64;) + { + tmpH = h+n; + tmpX = x; + i=n+1; + s = vo_mult32((*tmpX++), (*tmpH--));i--; + while(i>0) + { + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + i -= 4; + } + y[n] = ((s<<1) + 0x8000)>>16; + n++; + + tmpH = h+n; + tmpX = x; + i=n+1; + s = vo_mult32((*tmpX++), (*tmpH--));i--; + s += vo_mult32((*tmpX++), (*tmpH--));i--; + + while(i>0) + { + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + i -= 4; + } + y[n] = ((s<<1) + 0x8000)>>16; + n++; + + tmpH = h+n; + tmpX = x; + i=n+1; + s = vo_mult32((*tmpX++), (*tmpH--));i--; + s += vo_mult32((*tmpX++), (*tmpH--));i--; + s += vo_mult32((*tmpX++), (*tmpH--));i--; + + while(i>0) + { + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + i -= 4; + } + y[n] = ((s<<1) + 0x8000)>>16; + n++; + + s = 0; + tmpH = h+n; + tmpX = x; + i=n+1; + while(i>0) + { + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + s += vo_mult32((*tmpX++), (*tmpH--)); + i -= 4; + } + y[n] = ((s<<1) + 0x8000)>>16; + n++; + } + return; +} + + + |