[FFmpeg-devel] [PATCH] avfilter/avf_showcqt: add bar_t option

[Muhammad Faiz]

On 10/28/16, Muhammad Faiz <mfcc64 at gmail.com> wrote:
> custom bargraph transparency
>
> Signed-off-by: Muhammad Faiz <mfcc64 at gmail.com>
> ---
>  doc/filters.texi          |  4 ++++
>  libavfilter/avf_showcqt.c | 14 +++++++++-----
>  libavfilter/avf_showcqt.h |  3 ++-
>  3 files changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/doc/filters.texi b/doc/filters.texi
> index c37fa29..fb04a56 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -16835,6 +16835,10 @@ Acceptable range is @code{[1, 7]}.
>  Specify the bargraph gamma. Default value is @code{1}. Acceptable range is
>  @code{[1, 7]}.
>
> + at item bar_t
> +Specify the bargraph transparency level. Lower value makes the bargraph
> sharper.
> +Default value is @code{1}. Acceptable range is @code{[0, 1]}.
> +
>  @item timeclamp, tc
>  Specify the transform timeclamp. At low frequency, there is trade-off
> between
>  accuracy in time domain and frequency domain. If timeclamp is lower,
> diff --git a/libavfilter/avf_showcqt.c b/libavfilter/avf_showcqt.c
> index 49b950c..a25176d 100644
> --- a/libavfilter/avf_showcqt.c
> +++ b/libavfilter/avf_showcqt.c
> @@ -75,6 +75,7 @@ static const AVOption showcqt_options[] = {
>      { "gamma",    "set sonogram gamma", OFFSET(sono_g),
> AV_OPT_TYPE_FLOAT, { .dbl = 3.0 },            1.0, 7.0,      FLAGS },
>      { "bar_g",    "set bargraph gamma", OFFSET(bar_g),
> AV_OPT_TYPE_FLOAT, { .dbl = 1.0 },            1.0, 7.0,      FLAGS },
>      { "gamma2",   "set bargraph gamma", OFFSET(bar_g),
> AV_OPT_TYPE_FLOAT, { .dbl = 1.0 },            1.0, 7.0,      FLAGS },
> +    { "bar_t",  "set bar transparency", OFFSET(bar_t),
> AV_OPT_TYPE_FLOAT, { .dbl = 1.0 },            0.0, 1.0,      FLAGS },
>      { "timeclamp",     "set timeclamp", OFFSET(timeclamp),
> AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 },           0.1, 1.0,      FLAGS },
>      { "tc",            "set timeclamp", OFFSET(timeclamp),
> AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 },           0.1, 1.0,      FLAGS },
>      { "basefreq", "set base frequency", OFFSET(basefreq),
> AV_OPT_TYPE_DOUBLE, { .dbl = BASEFREQ },      10.0, 100000.0, FLAGS },
> @@ -752,10 +753,10 @@ static void yuv_from_cqt(ColorFloat *c, const
> FFTComplex *v, float gamma, int le
>  }
>
>  static void draw_bar_rgb(AVFrame *out, const float *h, const float *rcp_h,
> -                         const ColorFloat *c, int bar_h)
> +                         const ColorFloat *c, int bar_h, float bar_t)
>  {
>      int x, y, w = out->width;
> -    float mul, ht, rcp_bar_h = 1.0f / bar_h;
> +    float mul, ht, rcp_bar_h = 1.0f / bar_h, rcp_bar_t = 1.0f / bar_t;
>      uint8_t *v = out->data[0], *lp;
>      int ls = out->linesize[0];
>
> @@ -769,6 +770,7 @@ static void draw_bar_rgb(AVFrame *out, const float *h,
> const float *rcp_h,
>                  *lp++ = 0;
>              } else {
>                  mul = (h[x] - ht) * rcp_h[x];
> +                mul = (mul < bar_t) ? (mul * rcp_bar_t) : 1.0f;
>                  *lp++ = lrintf(mul * c[x].rgb.r);
>                  *lp++ = lrintf(mul * c[x].rgb.g);
>                  *lp++ = lrintf(mul * c[x].rgb.b);
> @@ -785,6 +787,7 @@ do { \
>          *lpv++ = 128; \
>      } else { \
>          mul = (h[x] - ht) * rcp_h[x]; \
> +        mul = (mul < bar_t) ? (mul * rcp_bar_t) : 1.0f; \
>          *lpy++ = lrintf(mul * c[x].yuv.y + 16.0f); \
>          *lpu++ = lrintf(mul * c[x].yuv.u + 128.0f); \
>          *lpv++ = lrintf(mul * c[x].yuv.v + 128.0f); \
> @@ -797,15 +800,16 @@ do { \
>          *lpy++ = 16; \
>      } else { \
>          mul = (h[x] - ht) * rcp_h[x]; \
> +        mul = (mul < bar_t) ? (mul * rcp_bar_t) : 1.0f; \
>          *lpy++ = lrintf(mul * c[x].yuv.y + 16.0f); \
>      } \
>  } while (0)
>
>  static void draw_bar_yuv(AVFrame *out, const float *h, const float *rcp_h,
> -                         const ColorFloat *c, int bar_h)
> +                         const ColorFloat *c, int bar_h, float bar_t)
>  {
>      int x, y, yh, w = out->width;
> -    float mul, ht, rcp_bar_h = 1.0f / bar_h;
> +    float mul, ht, rcp_bar_h = 1.0f / bar_h, rcp_bar_t = 1.0f / bar_t;
>      uint8_t *vy = out->data[0], *vu = out->data[1], *vv = out->data[2];
>      uint8_t *lpy, *lpu, *lpv;
>      int lsy = out->linesize[0], lsu = out->linesize[1], lsv =
> out->linesize[2];
> @@ -1160,7 +1164,7 @@ static int plot_cqt(AVFilterContext *ctx, AVFrame
> **frameout)
>          UPDATE_TIME(s->alloc_time);
>
>          if (s->bar_h) {
> -            s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h);
> +            s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h,
> s->bar_t);
>              UPDATE_TIME(s->bar_time);
>          }
>
> diff --git a/libavfilter/avf_showcqt.h b/libavfilter/avf_showcqt.h
> index 165d36e..3fa36f8 100644
> --- a/libavfilter/avf_showcqt.h
> +++ b/libavfilter/avf_showcqt.h
> @@ -78,7 +78,7 @@ typedef struct {
>                                      int len, int fft_len);
>      void                (*permute_coeffs)(float *v, int len);
>      void                (*draw_bar)(AVFrame *out, const float *h, const
> float *rcp_h,
> -                                    const ColorFloat *c, int bar_h);
> +                                    const ColorFloat *c, int bar_h, float
> bar_t);
>      void                (*draw_axis)(AVFrame *out, AVFrame *axis, const
> ColorFloat *c, int off);
>      void                (*draw_sono)(AVFrame *out, AVFrame *sono, int off,
> int idx);
>      void                (*update_sono)(AVFrame *sono, const ColorFloat *c,
> int idx);
> @@ -102,6 +102,7 @@ typedef struct {
>      char                *bar_v;
>      float               sono_g;
>      float               bar_g;
> +    float               bar_t;
>      double              timeclamp;
>      double              basefreq;
>      double              endfreq;
> --
> 2.5.0
>
>

applied

thanks