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avfilter/af_surround: expose window size to user

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This commit is contained in:
Paul B Mahol 2019-04-23 11:52:56 +02:00
parent ccc07ebe45
commit 7a128ac2bc
2 changed files with 6 additions and 1 deletions
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3
doc/filters.texi
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@ -4901,6 +4901,9 @@ Set spread usage of stereo image across X axis for each channel.
@item fcy, fly, fry, bly, bry, sly, sry, bcy
Set spread usage of stereo image across Y axis for each channel.
@item win_size
Set window size. Allowed range is from @var{1024} to @var{65536}. Default size is @var{4096}.
@item win_func
Set window function.

4
libavfilter/af_surround.c
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@ -40,6 +40,7 @@ typedef struct AudioSurroundContext {
float lfe_in;
float lfe_out;
int lfe_mode;
int win_size;
int win_func;
float overlap;
@ -1416,7 +1417,7 @@ fail:
return AVERROR(EINVAL);
}
s->buf_size = 4096;
s->buf_size = 1 << av_log2(s->win_size);
s->pts = AV_NOPTS_VALUE;
s->window_func_lut = av_calloc(s->buf_size, sizeof(*s->window_func_lut));
@ -1615,6 +1616,7 @@ static const AVOption surround_options[] = {
{ "sly", "set side left channel y spread", OFFSET(sl_y), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 15, FLAGS },
{ "sry", "set side right channel y spread", OFFSET(sr_y), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 15, FLAGS },
{ "bcy", "set back center channel y spread", OFFSET(bc_y), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 15, FLAGS },
{ "win_size", "set window size", OFFSET(win_size), AV_OPT_TYPE_INT, {.i64 = 4096}, 1024, 65536, FLAGS },
{ "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
{ "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" },
{ "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },