videolan
/
ffmpeg
mirror of https://git.videolan.org/git/ffmpeg.git
1
Fork 0
Code Releases Activity

Clean up fft_init() and mdct_init() 

Originally committed as revision 25959 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2010-12-14 14:51:12 +00:00
parent 6a988808a4
commit b84a211bc8
1 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
libavcodec/ac3enc.c
View File

@ -93,13 +93,14 @@ typedef struct IComplex {
static av_cold void fft_init(int ln)
{
int i, n;
int i, n, n2;
float alpha;
n = 1 << ln;
n = 1 << ln;
n2 = n >> 1;
for (i = 0; i < n/2; i++) {
alpha = 2 * M_PI * (float)i / (float)n;
for (i = 0; i < n2; i++) {
alpha = 2.0 * M_PI * i / n;
costab[i] = FIX15(cos(alpha));
sintab[i] = FIX15(sin(alpha));
}
@ -107,15 +108,15 @@ static av_cold void fft_init(int ln)
static av_cold void mdct_init(int nbits)
{
int i;
float alpha;
int n = 1 << nbits;
int n4 = n >> 2;
int i, n, n4;
n = 1 << nbits;
n4 = n >> 2;
fft_init(nbits - 2);
for (i = 0; i < n4; i++) {
alpha = 2 * M_PI * (i + 1.0 / 8.0) / n;
float alpha = 2.0 * M_PI * (i + 1.0 / 8.0) / n;
xcos1[i] = FIX15(-cos(alpha));
xsin1[i] = FIX15(-sin(alpha));
}