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lavfi/testsrc: add "decimals" option to the testsrc filter

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This commit is contained in:
Stefano Sabatini 2012-01-10 11:20:21 +01:00
parent 9f7144b44c
commit a798c20a76
3 changed files with 23 additions and 2 deletions
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8
doc/filters.texi
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@ -3237,6 +3237,14 @@ See also the function @code{av_parse_time()}.
If not specified, or the expressed duration is negative, the video is
supposed to be generated forever.
@item decimals, n
Set the number of decimals to show in the timestamp, only used in the
@code{testsrc} source.
The displayed timestamp value will correspond to the original
timestamp value multiplied by the power of 10 of the specified
value. Default value is 0.
@end table
For example the following:

2
libavfilter/version.h
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@ -30,7 +30,7 @@
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 59
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_MICRO 101
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \

15
libavfilter/vsrc_testsrc.c
View File

@ -47,6 +47,7 @@ typedef struct {
char *rate; ///< video frame rate
char *duration; ///< total duration of the generated video
AVRational sar; ///< sample aspect ratio
int nb_decimals;
void (* fill_picture_fn)(AVFilterContext *ctx, AVFilterBufferRef *picref);
@ -64,6 +65,8 @@ static const AVOption testsrc_options[]= {
{ "duration", "set video duration", OFFSET(duration), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0 },
{ "d", "set video duration", OFFSET(duration), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0 },
{ "sar", "set video sample aspect ratio", OFFSET(sar), AV_OPT_TYPE_RATIONAL, {.dbl= 1}, 0, INT_MAX },
{ "decimals", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.dbl=0}, INT_MIN, INT_MAX },
{ "n", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.dbl=0}, INT_MIN, INT_MAX },
{ NULL },
};
@ -97,6 +100,12 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
return ret;
}
if (test->nb_decimals && strcmp(ctx->filter->name, "testsrc")) {
av_log(ctx, AV_LOG_WARNING,
"Option 'decimals' is ignored with source '%s'\n",
ctx->filter->name);
}
test->time_base.num = frame_rate_q.den;
test->time_base.den = frame_rate_q.num;
test->max_pts = duration >= 0 ?
@ -361,7 +370,11 @@ static void test_fill_picture(AVFilterContext *ctx, AVFilterBufferRef *picref)
/* draw digits */
seg_size = width / 80;
if (seg_size >= 1 && height >= 13 * seg_size) {
second = test->nb_frame * test->time_base.num / test->time_base.den;
double time = av_q2d(test->time_base) * test->nb_frame *
pow(10, test->nb_decimals);
if (time > INT_MAX)
return;
second = (int)time;
x = width - (width - seg_size * 64) / 2;
y = (height - seg_size * 13) / 2;
p = data + (x*3 + y * picref->linesize[0]);