[FFmpeg-cvslog] avfilter/vf_signalstats: measure video bitdepth
Paul B Mahol
git at videolan.org
Sat Aug 13 14:01:16 EEST 2016
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Thu Aug 11 18:10:46 2016 +0200| [3a81775bdee7c02dac0d933f3c2b565ac5d9c97c] | committer: Paul B Mahol
avfilter/vf_signalstats: measure video bitdepth
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3a81775bdee7c02dac0d933f3c2b565ac5d9c97c
---
doc/filters.texi | 12 ++++++++++++
libavfilter/vf_signalstats.c | 25 +++++++++++++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/doc/filters.texi b/doc/filters.texi
index dda1c17..3a9e251 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -11946,6 +11946,18 @@ Expressed in range of [0-255].
Display the average of sample value difference between all values of the V
plane in the current frame and corresponding values of the previous input frame.
Expressed in range of [0-255].
+
+ at item YBITDEPTH
+Display bit depth of Y plane in current frame.
+Expressed in range of [0-16].
+
+ at item UBITDEPTH
+Display bit depth of U plane in current frame.
+Expressed in range of [0-16].
+
+ at item VBITDEPTH
+Display bit depth of V plane in current frame.
+Expressed in range of [0-16].
@end table
The filter accepts the following options:
diff --git a/libavfilter/vf_signalstats.c b/libavfilter/vf_signalstats.c
index 259b0a1..00051f2 100644
--- a/libavfilter/vf_signalstats.c
+++ b/libavfilter/vf_signalstats.c
@@ -541,6 +541,11 @@ static int compute_sat_hue_metrics16(AVFilterContext *ctx, void *arg, int jobnr,
return 0;
}
+static unsigned compute_bit_depth(uint16_t mask)
+{
+ return av_popcount(mask);
+}
+
static int filter_frame8(AVFilterLink *link, AVFrame *in)
{
AVFilterContext *ctx = link->dst;
@@ -569,6 +574,7 @@ static int filter_frame8(AVFilterLink *link, AVFrame *in)
int toty = 0, totu = 0, totv = 0, totsat=0;
int tothue = 0;
int dify = 0, difu = 0, difv = 0;
+ uint16_t masky = 0, masku = 0, maskv = 0;
int filtot[FILT_NUMB] = {0};
AVFrame *prev;
@@ -602,6 +608,8 @@ static int filter_frame8(AVFilterLink *link, AVFrame *in)
for (j = 0; j < link->h; j++) {
for (i = 0; i < link->w; i++) {
const int yuv = in->data[0][w + i];
+
+ masky |= yuv;
histy[yuv]++;
dify += abs(yuv - prev->data[0][pw + i]);
}
@@ -614,6 +622,9 @@ static int filter_frame8(AVFilterLink *link, AVFrame *in)
for (i = 0; i < s->chromaw; i++) {
const int yuvu = in->data[1][cw+i];
const int yuvv = in->data[2][cw+i];
+
+ masku |= yuvu;
+ maskv |= yuvv;
histu[yuvu]++;
difu += abs(yuvu - prev->data[1][cpw+i]);
histv[yuvv]++;
@@ -735,6 +746,10 @@ static int filter_frame8(AVFilterLink *link, AVFrame *in)
SET_META("UDIF", "%g", 1.0 * difu / s->cfs);
SET_META("VDIF", "%g", 1.0 * difv / s->cfs);
+ SET_META("YBITDEPTH", "%d", compute_bit_depth(masky));
+ SET_META("UBITDEPTH", "%d", compute_bit_depth(masku));
+ SET_META("VBITDEPTH", "%d", compute_bit_depth(maskv));
+
for (fil = 0; fil < FILT_NUMB; fil ++) {
if (s->filters & 1<<fil) {
char metaname[128];
@@ -777,6 +792,7 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
int64_t toty = 0, totu = 0, totv = 0, totsat=0;
int64_t tothue = 0;
int64_t dify = 0, difu = 0, difv = 0;
+ uint16_t masky = 0, masku = 0, maskv = 0;
int filtot[FILT_NUMB] = {0};
AVFrame *prev;
@@ -811,6 +827,8 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
for (j = 0; j < link->h; j++) {
for (i = 0; i < link->w; i++) {
const int yuv = AV_RN16(in->data[0] + w + i * 2);
+
+ masky |= yuv;
histy[yuv]++;
dify += abs(yuv - AV_RN16(prev->data[0] + pw + i * 2));
}
@@ -826,6 +844,9 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
for (i = 0; i < s->chromaw; i++) {
const int yuvu = AV_RN16(in->data[1] + cw + i * 2);
const int yuvv = AV_RN16(in->data[2] + cw + i * 2);
+
+ masku |= yuvu;
+ maskv |= yuvv;
histu[yuvu]++;
difu += abs(yuvu - AV_RN16(prev->data[1] + cpw + i * 2));
histv[yuvv]++;
@@ -942,6 +963,10 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
SET_META("UDIF", "%g", 1.0 * difu / s->cfs);
SET_META("VDIF", "%g", 1.0 * difv / s->cfs);
+ SET_META("YBITDEPTH", "%d", compute_bit_depth(masky));
+ SET_META("UBITDEPTH", "%d", compute_bit_depth(masku));
+ SET_META("VBITDEPTH", "%d", compute_bit_depth(maskv));
+
for (fil = 0; fil < FILT_NUMB; fil ++) {
if (s->filters & 1<<fil) {
char metaname[128];
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