eessppeelllloo/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-12-12 10:00:08 +01:00
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'newdev/master'

Browse Source 
* newdev/master:
  mpegts: propagate avio EOF in read_packet()
  configure: Initial support for --target-os=symbian
  Fixed-point FFT and MDCT
  Include dependencies for test programs
  ac3enc: simplify sym_quant()
  flvdec: read index stored in the 'keyframes' tag.
  mov: Add support for zero-sized stsc runs.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2011-04-01 02:55:29 +02:00
parent 859676dd42 e006d71fa8
commit 7ac167493e
16 changed files with 334 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
libavcodec/costablegen.c
View File

@@ -29,14 +29,33 @@
#endif
#define BITS 16
#define FLOATFMT "%.18e"
#define FIXEDFMT "%6d"
static int clip_f15(int v)
{
return v < -32767 ? -32767 :
v > 32767 ? 32767 :
v;
}
static void printval(double val, int fixed)
{
if (fixed)
printf(" "FIXEDFMT",", clip_f15(lrint(val * (double)(1<<15))));
else
printf(" "FLOATFMT",", val);
}
int main(int argc, char *argv[])
{
int i, j;
int do_sin = argc == 2 && !strcmp(argv[1], "sin");
int do_sin = argc > 1 && !strcmp(argv[1], "sin");
int fixed = argc > 2 && !strcmp(argv[2], "fixed");
double (*func)(double) = do_sin ? sin : cos;
printf("/* This file was generated by libavcodec/costablegen */\n");
printf("#define CONFIG_FFT_FLOAT %d\n", !fixed);
printf("#include \"libavcodec/%s\"\n", do_sin ? "rdft.h" : "fft.h");
for (i = 4; i <= BITS; i++) {
int m = 1 << i;
@@ -46,11 +65,12 @@ int main(int argc, char *argv[])
int idx = j > m/4 ? m/2 - j : j;
if (do_sin && j >= m/4)
idx = m/4 - j;
printf(" "FLOATFMT",", func(idx*freq));
printval(func(idx*freq), fixed);
if ((j & 3) == 3)
printf("\n ");
}
printf(" "FLOATFMT"\n};\n", func(do_sin ? -(m/4 - 1)*freq : freq));
printval(func(do_sin ? -(m/4 - 1)*freq : freq), fixed);
printf("\n};\n");
}
return 0;
}