[SCM] libav/experimental: Move vars declaration to inner loop when possible
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 16:24:42 UTC 2013
The following commit has been merged in the experimental branch:
commit 69c23e6f33c38ebc03ce7f51fcb963deaff7383b
Author: Vitor Sessak <vitor1001 at gmail.com>
Date: Fri Jul 4 15:37:52 2008 +0000
Move vars declaration to inner loop when possible
Originally committed as revision 14066 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/ra288.c b/libavcodec/ra288.c
index 355a7ab..86a0a6a 100644
--- a/libavcodec/ra288.c
+++ b/libavcodec/ra288.c
@@ -41,16 +41,14 @@ typedef struct {
static void decode(Real288_internal *glob, float gain, int cb_coef)
{
unsigned int x, y;
- float f;
double sum, sumsum;
- float *p1, *p2;
float buffer[5];
for (x=36; x--; glob->sb[x+5] = glob->sb[x]);
for (x=5; x--;) {
- p1 = glob->sb+x;
- p2 = glob->pr1;
+ float *p1 = glob->sb+x;
+ float *p2 = glob->pr1;
for (sum=0, y=36; y--; sum -= (*(++p1))*(*(p2++)));
glob->sb[x] = sum;
@@ -84,7 +82,7 @@ static void decode(Real288_internal *glob, float gain, int cb_coef)
/* output */
for (x=0; x < 5; x++) {
- f = glob->sb[4-x] + buffer[x];
+ float f = glob->sb[4-x] + buffer[x];
if (f > 4095)
f = 4095;
@@ -105,9 +103,7 @@ static void colmult(float *tgt, float *m1, const float *m2, int n)
static int pred(float *in, float *tgt, int n)
{
int x, y;
- float *p1, *p2;
double f0, f1, f2;
- float temp;
if (in[n] == 0)
return 0;
@@ -116,11 +112,12 @@ static int pred(float *in, float *tgt, int n)
return 0;
for (x=1 ; ; x++) {
+ float *p1 = in + x;
+ float *p2 = tgt;
+
if (n < x)
return 1;
- p1 = in + x;
- p2 = tgt;
f1 = *(p1--);
for (y=x; --y; f1 += (*(p1--))*(*(p2++)));
@@ -128,7 +125,7 @@ static int pred(float *in, float *tgt, int n)
p2 = tgt;
*(p1--) = f2 = -f1/f0;
for (y=x >> 1; y--;) {
- temp = *p2 + *p1 * f2;
+ float temp = *p2 + *p1 * f2;
*(p1--) += *p2 * f2;
*(p2++) = temp;
}
@@ -141,11 +138,11 @@ static int pred(float *in, float *tgt, int n)
static void prodsum(float *tgt, float *src, int len, int n)
{
unsigned int x;
- float *p1, *p2;
double sum;
while (n >= 0) {
- p1 = (p2 = src) - n;
+ float *p2 = src;
+ float *p1 = p2 - n;
for (sum=0, x=len; x--; sum += (*p1++) * (*p2++));
tgt[n--] = sum;
}
--
Libav/FFmpeg packaging
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