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avfilter/avf_avectorscope: add swap and mirror options

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-11-21 12:07:13 +01:00
parent 37810bee78
commit afd2bf54c3
2 changed files with 37 additions and 0 deletions
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20
doc/filters.texi
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@ -17232,6 +17232,26 @@ Cubic root.
Logarithmic.
@end table
@item swap
Swap left channel axis with right channel axis.
@item mirror
Mirror axis.
@table @samp
@item none
No mirror.
@item x
Mirror only x axis.
@item y
Mirror only y axis.
@item xy
Mirror both axis.
@end table
@end table
@subsection Examples

17
libavfilter/avf_avectorscope.c
View File

@ -65,6 +65,8 @@ typedef struct AudioVectorScopeContext {
int contrast[4];
int fade[4];
double zoom;
int swap;
int mirror;
unsigned prev_x, prev_y;
AVRational frame_rate;
} AudioVectorScopeContext;
@ -99,6 +101,12 @@ static const AVOption avectorscope_options[] = {
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
{ "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
{ "swap", "swap x axis with y axis", OFFSET(swap), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "mirror", "mirror axis", OFFSET(mirror), AV_OPT_TYPE_INT, {.i64=2}, 0, 3, FLAGS, "mirror" },
{ "none", "no mirror", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mirror" },
{ "x", "mirror x", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mirror" },
{ "y", "mirror y", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mirror" },
{ "xy", "mirror both", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "mirror" },
{ NULL }
};
@ -316,6 +324,15 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
break;
}
if (s->mirror & 1)
src[0] = -src[0];
if (s->mirror & 2)
src[1] = -src[1];
if (s->swap)
FFSWAP(float, src[0], src[1]);;
if (s->mode == LISSAJOUS) {
x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;