from colorspace filter
Signed-off-by: Muhammad Faiz <mfc...@gmail.com>
---
doc/filters.texi | 26 ++++++++++++++++++++++
libavfilter/avf_showcqt.c | 56 ++++++++++++++++++++++++++++++++++++++++++-----
libavfilter/avf_showcqt.h | 2 ++
3 files changed, 79 insertions(+), 5 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index 76265e7..a79972b 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -16884,6 +16884,32 @@ Enable/disable drawing text to the axis. If it is set
to @code{0}, drawing to
the axis is disabled, ignoring @var{fontfile} and @var{axisfile} option.
Default value is @code{1}.
+@item csp
+Set colorspace. The accepted values are:
+@table @samp
+@item unspecified
+Unspecified (default)
+
+@item bt709
+BT.709
+
+@item fcc
+FCC
+
+@item bt470bg
+BT.470BG or BT.601-6 625
+
+@item smpte170m
+SMPTE-170M or BT.601-6 525
+
+@item smpte240m
+SMPTE-240M
+
+@item bt2020ncl
+BT.2020 with non-constant luminance
+
+@end table
+
@end table
@subsection Examples
diff --git a/libavfilter/avf_showcqt.c b/libavfilter/avf_showcqt.c
index 16bb2be..7c76b1f 100644
--- a/libavfilter/avf_showcqt.c
+++ b/libavfilter/avf_showcqt.c
@@ -83,6 +83,14 @@ static const AVOption showcqt_options[] = {
{ "axisfile", "set axis image", OFFSET(axisfile), AV_OPT_TYPE_STRING,
{ .str = NULL }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "axis", "draw axis", OFFSET(axis), AV_OPT_TYPE_BOOL,
{ .i64 = 1 }, 0, 1, FLAGS },
{ "text", "draw axis", OFFSET(axis), AV_OPT_TYPE_BOOL,
{ .i64 = 1 }, 0, 1, FLAGS },
+ { "csp", "set color space", OFFSET(csp), AV_OPT_TYPE_INT,
{ .i64 = AVCOL_SPC_UNSPECIFIED }, 0, INT_MAX, FLAGS, "csp" },
+ { "unspecified", "unspecified", 0, AV_OPT_TYPE_CONST,
{ .i64 = AVCOL_SPC_UNSPECIFIED }, 0, 0, FLAGS, "csp" },
+ { "bt709", "bt709", 0, AV_OPT_TYPE_CONST,
{ .i64 = AVCOL_SPC_BT709 }, 0, 0, FLAGS, "csp" },
+ { "fcc", "fcc", 0, AV_OPT_TYPE_CONST,
{ .i64 = AVCOL_SPC_FCC }, 0, 0, FLAGS, "csp" },
+ { "bt470bg", "bt470bg", 0, AV_OPT_TYPE_CONST,
{ .i64 = AVCOL_SPC_BT470BG }, 0, 0, FLAGS, "csp" },
+ { "smpte170m", "smpte170m", 0, AV_OPT_TYPE_CONST,
{ .i64 = AVCOL_SPC_SMPTE170M }, 0, 0, FLAGS, "csp" },
+ { "smpte240m", "smpte240m", 0, AV_OPT_TYPE_CONST,
{ .i64 = AVCOL_SPC_SMPTE240M }, 0, 0, FLAGS, "csp" },
+ { "bt2020ncl", "bt2020ncl", 0, AV_OPT_TYPE_CONST,
{ .i64 = AVCOL_SPC_BT2020_NCL }, 0, 0, FLAGS, "csp" },
{ NULL }
};
@@ -656,7 +664,7 @@ static void rgb_from_cqt(ColorFloat *c, const FFTComplex
*v, float g, int len)
}
}
-static void yuv_from_cqt(ColorFloat *c, const FFTComplex *v, float gamma, int
len)
+static void yuv_from_cqt(ColorFloat *c, const FFTComplex *v, float gamma, int
len, float cm[3][3])
{
int x;
for (x = 0; x < len; x++) {
@@ -664,9 +672,9 @@ static void yuv_from_cqt(ColorFloat *c, const FFTComplex
*v, float gamma, int le
r = calculate_gamma(FFMIN(1.0f, v[x].re), gamma);
g = calculate_gamma(FFMIN(1.0f, 0.5f * (v[x].re + v[x].im)), gamma);
b = calculate_gamma(FFMIN(1.0f, v[x].im), gamma);
- c[x].yuv.y = 65.481f * r + 128.553f * g + 24.966f * b;
- c[x].yuv.u = -37.797f * r - 74.203f * g + 112.0f * b;
- c[x].yuv.v = 112.0f * r - 93.786f * g - 18.214 * b;
+ c[x].yuv.y = cm[0][0] * r + cm[0][1] * g + cm[0][2] * b;
+ c[x].yuv.u = cm[1][0] * r + cm[1][1] * g + cm[1][2] * b;
+ c[x].yuv.v = cm[2][0] * r + cm[2][1] * g + cm[2][2] * b;
}
}
@@ -1036,7 +1044,7 @@ static void process_cqt(ShowCQTContext *s)
if (s->format == AV_PIX_FMT_RGB24)
rgb_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);
else
- yuv_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);
+ yuv_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width, s->cmatrix);
}
static int plot_cqt(AVFilterContext *ctx, AVFrame **frameout)
@@ -1075,6 +1083,7 @@ static int plot_cqt(AVFilterContext *ctx, AVFrame
**frameout)
return AVERROR(ENOMEM);
out->sample_aspect_ratio = av_make_q(1, 1);
av_frame_set_color_range(out, AVCOL_RANGE_MPEG);
+ av_frame_set_colorspace(out, s->csp);
UPDATE_TIME(s->alloc_time);
if (s->bar_h) {
@@ -1100,6 +1109,41 @@ static int plot_cqt(AVFilterContext *ctx, AVFrame
**frameout)
return 0;
}
+static void init_colormatrix(ShowCQTContext *s)
+{
+ double kr, kg, kb;
+
+ /* from vf_colorspace.c */
+ switch (s->csp) {
+ default:
+ av_log(s->ctx, AV_LOG_WARNING, "unsupported colorspace, setting it to
unspecified.\n");
+ s->csp = AVCOL_SPC_UNSPECIFIED;
+ case AVCOL_SPC_UNSPECIFIED:
+ case AVCOL_SPC_BT470BG:
+ case AVCOL_SPC_SMPTE170M:
+ kr = 0.299; kb = 0.114; break;
+ case AVCOL_SPC_BT709:
+ kr = 0.2126; kb = 0.0722; break;
+ case AVCOL_SPC_FCC:
+ kr = 0.30; kb = 0.11; break;
+ case AVCOL_SPC_SMPTE240M:
+ kr = 0.212; kb = 0.087; break;
+ case AVCOL_SPC_BT2020_NCL:
+ kr = 0.2627; kb = 0.0593; break;
+ }
+
+ kg = 1.0 - kr - kb;
+ s->cmatrix[0][0] = 219.0 * kr;
+ s->cmatrix[0][1] = 219.0 * kg;
+ s->cmatrix[0][2] = 219.0 * kb;
+ s->cmatrix[1][0] = -112.0 * kr / (1.0 - kb);
+ s->cmatrix[1][1] = -112.0 * kg / (1.0 - kb);
+ s->cmatrix[1][2] = 112.0;
+ s->cmatrix[2][0] = 112.0;
+ s->cmatrix[2][1] = -112.0 * kg / (1.0 - kr);
+ s->cmatrix[2][2] = -112.0 * kb / (1.0 - kr);
+}
+
/* main filter control */
static av_cold int init(AVFilterContext *ctx)
{
@@ -1153,6 +1197,8 @@ static av_cold int init(AVFilterContext *ctx)
} while(s->fcount * s->width < 1920 && s->fcount < 10);
}
+ init_colormatrix(s);
+
return 0;
}
diff --git a/libavfilter/avf_showcqt.h b/libavfilter/avf_showcqt.h
index 588830f..71e9d13 100644
--- a/libavfilter/avf_showcqt.h
+++ b/libavfilter/avf_showcqt.h
@@ -71,6 +71,7 @@ typedef struct {
float *rcp_h_buf;
float *sono_v_buf;
float *bar_v_buf;
+ float cmatrix[3][3];
/* callback */
void (*cqt_calc)(FFTComplex *dst, const FFTComplex *src,
const Coeffs *coeffs,
int len, int fft_len);
@@ -111,6 +112,7 @@ typedef struct {
char *fontcolor;
char *axisfile;
int axis;
+ int csp;
} ShowCQTContext;
void ff_showcqt_init_x86(ShowCQTContext *s);
--
2.5.0
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