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libavfilter/ebur128: add gauge option

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Allow to show short-term instead of momentary in gauge. Useful for monitoring
whilst live mixing.

Signed-off-by: Daniel Molkentin <daniel@molkentin.de>
Signed-off-by: Conrad Zelck <c.zelck@imail.de>
This commit is contained in:
Daniel Molkentin
2018-10-09 14:32:55 +02:00
committed by Paul B Mahol
parent 1cee8f03cf
commit d587390988
2 changed files with 29 additions and 3 deletions
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23
libavfilter/f_ebur128.c
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@@ -143,6 +143,7 @@ typedef struct EBUR128Context {
int dual_mono; ///< whether or not to treat single channel input files as dual-mono
double pan_law; ///< pan law value used to calculate dual-mono measurements
int target; ///< target level in LUFS used to set relative zero LU in visualization
int gauge_type; ///< whether gauge shows momentary or short
} EBUR128Context;
enum {
@@ -151,6 +152,12 @@ enum {
PEAK_MODE_TRUE_PEAKS = 1<<2,
};
enum {
GAUGE_TYPE_MOMENTARY = 0,
GAUGE_TYPE_SHORTTERM = 1,
};
#define OFFSET(x) offsetof(EBUR128Context, x)
#define A AV_OPT_FLAG_AUDIO_PARAM
#define V AV_OPT_FLAG_VIDEO_PARAM
@@ -170,6 +177,11 @@ static const AVOption ebur128_options[] = {
{ "dualmono", "treat mono input files as dual-mono", OFFSET(dual_mono), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, A|F },
{ "panlaw", "set a specific pan law for dual-mono files", OFFSET(pan_law), AV_OPT_TYPE_DOUBLE, {.dbl = -3.01029995663978}, -10.0, 0.0, A|F },
{ "target", "set a specific target level in LUFS (-23 to 0)", OFFSET(target), AV_OPT_TYPE_INT, {.i64 = -23}, -23, 0, V|F },
{ "gauge", "set gauge display type", OFFSET(gauge_type), AV_OPT_TYPE_INT, {.i64 = 0 }, GAUGE_TYPE_MOMENTARY, GAUGE_TYPE_SHORTTERM, V|F, "gaugetype" },
{ "momentary", "display momentary value", 0, AV_OPT_TYPE_CONST, {.i64 = GAUGE_TYPE_MOMENTARY}, INT_MIN, INT_MAX, V|F, "gaugetype" },
{ "m", "display momentary value", 0, AV_OPT_TYPE_CONST, {.i64 = GAUGE_TYPE_MOMENTARY}, INT_MIN, INT_MAX, V|F, "gaugetype" },
{ "shortterm", "display short-term value", 0, AV_OPT_TYPE_CONST, {.i64 = GAUGE_TYPE_SHORTTERM}, INT_MIN, INT_MAX, V|F, "gaugetype" },
{ "s", "display short-term value", 0, AV_OPT_TYPE_CONST, {.i64 = GAUGE_TYPE_SHORTTERM}, INT_MIN, INT_MAX, V|F, "gaugetype" },
{ NULL },
};
@@ -741,9 +753,16 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
if (ebur128->do_video) {
int x, y, ret;
uint8_t *p;
double gauge_value;
if (ebur128->gauge_type == GAUGE_TYPE_MOMENTARY) {
gauge_value = loudness_400 - ebur128->target;
} else {
gauge_value = loudness_3000 - ebur128->target;
}
const int y_loudness_lu_graph = lu_to_y(ebur128, loudness_3000 - ebur128->target);
const int y_loudness_lu_gauge = lu_to_y(ebur128, loudness_400 - ebur128->target);
const int y_loudness_lu_gauge = lu_to_y(ebur128, gauge_value);
/* draw the graph using the short-term loudness */
p = pic->data[0] + ebur128->graph.y*pic->linesize[0] + ebur128->graph.x*3;
@@ -755,7 +774,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
p += pic->linesize[0];
}
/* draw the gauge using the momentary loudness */
/* draw the gauge using either momentary or short-term loudness */
p = pic->data[0] + ebur128->gauge.y*pic->linesize[0] + ebur128->gauge.x*3;
for (y = 0; y < ebur128->gauge.h; y++) {
const uint8_t *c = get_graph_color(ebur128, y_loudness_lu_gauge, y);