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vsrc_testsrc: avoid floats and non bit exactness 

The round to zero behavior is maintained, possibly this should
be changed to round to nearest.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-25 03:01:47 +01:00
parent 01df2a13c3
commit ae65327e5e
1 changed files with 9 additions and 4 deletions
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13
libavfilter/vsrc_testsrc.c
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@ -89,8 +89,8 @@ static const AVOption options[] = {
{ "c", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
/* only used by testsrc */
{ "decimals", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX, FLAGS },
{ "n", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX, FLAGS },
{ "decimals", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0}, 0, 17, FLAGS },
{ "n", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0}, 0, 17, FLAGS },
{ NULL },
};
@ -483,11 +483,16 @@ static void test_fill_picture(AVFilterContext *ctx, AVFrame *frame)
/* draw digits */
seg_size = width / 80;
if (seg_size >= 1 && height >= 13 * seg_size) {
int64_t p10decimals = 1;
double time = av_q2d(test->time_base) * test->nb_frame *
pow(10, test->nb_decimals);
if (time > INT_MAX)
if (time >= INT_MAX)
return;
second = (int)time;
for(x=0; x<test->nb_decimals; x++)
p10decimals *= 10;
second = av_rescale_rnd(test->nb_frame * test->time_base.num, p10decimals, test->time_base.den, AV_ROUND_ZERO);
x = width - (width - seg_size * 64) / 2;
y = (height - seg_size * 13) / 2;
p = data + (x*3 + y * frame->linesize[0]);