generic-library/ffmpeg
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log2 to av_log2

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Originally committed as revision 101 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2001-08-15 13:11:31 +00:00
parent 0c23ead115
commit 935442b522
2 changed files with 3 additions and 3 deletions
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2
libavcodec/h263.c
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@ -1178,7 +1178,7 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
skip_bits1(&s->gb); /* marker */ skip_bits1(&s->gb); /* marker */
time_increment_resolution = get_bits(&s->gb, 16); time_increment_resolution = get_bits(&s->gb, 16);
s->time_increment_bits = log2(time_increment_resolution - 1) + 1; s->time_increment_bits = av_log2(time_increment_resolution - 1) + 1;
if (s->time_increment_bits < 1) if (s->time_increment_bits < 1)
s->time_increment_bits = 1; s->time_increment_bits = 1;
skip_bits1(&s->gb); /* marker */ skip_bits1(&s->gb); /* marker */

4
libavcodec/mpegaudio.c
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@ -317,7 +317,7 @@ static void filter(MpegAudioContext *s, int ch, short *samples, int incr)
for(i=0;i<32;i++) { for(i=0;i<32;i++) {
norm |= abs(tmp1[i]); norm |= abs(tmp1[i]);
} }
n = log2(norm) - 12; n = av_log2(norm) - 12;
if (n > 0) { if (n > 0) {
for(i=0;i<32;i++) for(i=0;i<32;i++)
tmp1[i] >>= n; tmp1[i] >>= n;
@ -364,7 +364,7 @@ static void compute_scale_factors(unsigned char scale_code[SBLIMIT],
} }
/* compute the scale factor index using log 2 computations */ /* compute the scale factor index using log 2 computations */
if (vmax > 0) { if (vmax > 0) {
n = log2(vmax); n = av_log2(vmax);
/* n is the position of the MSB of vmax. now /* n is the position of the MSB of vmax. now
use at most 2 compares to find the index */ use at most 2 compares to find the index */
index = (21 - n) * 3 - 3; index = (21 - n) * 3 - 3;