avfilter/avf_showspectrum: add option to draw legend
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
7ab37cae34
commit
08aec7c1bd
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@ -14827,6 +14827,7 @@ It accepts the following values:
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@item nuttall
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@item lanczos
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@item gauss
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@item tukey
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@end table
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Default value is @code{hann}.
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@ -14837,6 +14838,9 @@ Set orientation of time vs frequency axis. Can be @code{vertical} or
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@item gain
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Set scale gain for calculating intensity color values.
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Default value is @code{1}.
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@item legend
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Draw time and frequency axes and legends. Default is enabled.
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@end table
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@subsection Examples
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@ -31,8 +31,10 @@
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#include "libavcodec/avfft.h"
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#include "libavutil/audio_fifo.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/opt.h"
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#include "libavutil/xga_font_data.h"
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#include "audio.h"
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#include "video.h"
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#include "avfilter.h"
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@ -74,6 +76,8 @@ typedef struct {
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AVAudioFifo *fifo;
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int64_t pts;
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int single_pic;
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int legend;
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int start_x, start_y;
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} ShowSpectrumContext;
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#define OFFSET(x) offsetof(ShowSpectrumContext, x)
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@ -269,8 +273,15 @@ static int config_output(AVFilterLink *outlink)
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outlink->w = s->w;
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outlink->h = s->h;
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h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? outlink->h : outlink->h / inlink->channels;
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w = (s->mode == COMBINED || s->orientation == VERTICAL) ? outlink->w : outlink->w / inlink->channels;
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if (s->legend) {
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s->start_x = log10(inlink->sample_rate) * 25;
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s->start_y = 64;
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outlink->w += s->start_x * 2;
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outlink->h += s->start_y * 2;
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}
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h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->channels;
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w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->channels;
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s->channel_height = h;
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s->channel_width = w;
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@ -356,23 +367,23 @@ static int config_output(AVFilterLink *outlink)
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}
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}
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if ((s->orientation == VERTICAL && s->xpos >= outlink->w) ||
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(s->orientation == HORIZONTAL && s->xpos >= outlink->h))
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if ((s->orientation == VERTICAL && s->xpos >= s->w) ||
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(s->orientation == HORIZONTAL && s->xpos >= s->h))
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s->xpos = 0;
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outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap));
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if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
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outlink->frame_rate.den *= outlink->w;
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outlink->frame_rate.den *= s->w;
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if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
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outlink->frame_rate.den *= outlink->h;
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outlink->frame_rate.den *= s->h;
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if (s->orientation == VERTICAL) {
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s->combine_buffer =
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av_realloc_f(s->combine_buffer, outlink->h * 3,
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av_realloc_f(s->combine_buffer, s->h * 3,
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sizeof(*s->combine_buffer));
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} else {
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s->combine_buffer =
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av_realloc_f(s->combine_buffer, outlink->w * 3,
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av_realloc_f(s->combine_buffer, s->w * 3,
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sizeof(*s->combine_buffer));
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}
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@ -447,6 +458,57 @@ static void scale_magnitudes(ShowSpectrumContext *s, float scale)
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}
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}
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static void color_range(ShowSpectrumContext *s, int ch,
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float *yf, float *uf, float *vf)
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{
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switch (s->mode) {
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case COMBINED:
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// reduce range by channel count
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*yf = 256.0f / s->nb_display_channels;
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switch (s->color_mode) {
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case RAINBOW:
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case MORELAND:
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case NEBULAE:
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case FIRE:
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case FIERY:
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case FRUIT:
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case INTENSITY:
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*uf = *yf;
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*vf = *yf;
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break;
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case CHANNEL:
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/* adjust saturation for mixed UV coloring */
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/* this factor is correct for infinite channels, an approximation otherwise */
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*uf = *yf * M_PI;
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*vf = *yf * M_PI;
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break;
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default:
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av_assert0(0);
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}
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break;
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case SEPARATE:
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// full range
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*yf = 256.0f;
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*uf = 256.0f;
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*vf = 256.0f;
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break;
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default:
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av_assert0(0);
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}
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if (s->color_mode == CHANNEL) {
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if (s->nb_display_channels > 1) {
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*uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels);
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*vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels);
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} else {
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*uf = 0.0f;
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*vf = 0.0f;
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}
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}
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*uf *= s->saturation;
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*vf *= s->saturation;
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}
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static void pick_color(ShowSpectrumContext *s,
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float yf, float uf, float vf,
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float a, float *out)
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@ -517,59 +579,14 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
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/* fill a new spectrum column */
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/* initialize buffer for combining to black */
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clear_combine_buffer(s, s->orientation == VERTICAL ? outlink->h : outlink->w);
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clear_combine_buffer(s, s->orientation == VERTICAL ? s->h : s->w);
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for (ch = 0; ch < s->nb_display_channels; ch++) {
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float *magnitudes = s->magnitudes[ch];
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float yf, uf, vf;
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/* decide color range */
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switch (s->mode) {
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case COMBINED:
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// reduce range by channel count
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yf = 256.0f / s->nb_display_channels;
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switch (s->color_mode) {
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case RAINBOW:
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case MORELAND:
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case NEBULAE:
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case FIRE:
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case FIERY:
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case FRUIT:
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case INTENSITY:
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uf = yf;
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vf = yf;
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break;
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case CHANNEL:
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/* adjust saturation for mixed UV coloring */
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/* this factor is correct for infinite channels, an approximation otherwise */
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uf = yf * M_PI;
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vf = yf * M_PI;
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break;
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default:
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av_assert0(0);
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}
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break;
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case SEPARATE:
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// full range
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yf = 256.0f;
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uf = 256.0f;
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vf = 256.0f;
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break;
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default:
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av_assert0(0);
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}
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if (s->color_mode == CHANNEL) {
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if (s->nb_display_channels > 1) {
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uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels);
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vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels);
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} else {
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uf = 0.0f;
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vf = 0.0f;
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}
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}
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uf *= s->saturation;
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vf *= s->saturation;
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color_range(s, ch, &yf, &uf, &vf);
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/* draw the channel */
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for (y = 0; y < h; y++) {
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@ -611,28 +628,28 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
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if (s->orientation == VERTICAL) {
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if (s->sliding == SCROLL) {
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for (plane = 0; plane < 3; plane++) {
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for (y = 0; y < outlink->h; y++) {
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for (y = 0; y < s->h; y++) {
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uint8_t *p = outpicref->data[plane] +
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y * outpicref->linesize[plane];
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memmove(p, p + 1, outlink->w - 1);
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memmove(p, p + 1, s->w - 1);
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}
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}
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s->xpos = outlink->w - 1;
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s->xpos = s->w - 1;
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} else if (s->sliding == RSCROLL) {
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for (plane = 0; plane < 3; plane++) {
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for (y = 0; y < outlink->h; y++) {
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for (y = 0; y < s->h; y++) {
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uint8_t *p = outpicref->data[plane] +
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y * outpicref->linesize[plane];
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memmove(p + 1, p, outlink->w - 1);
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memmove(p + 1, p, s->w - 1);
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}
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}
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s->xpos = 0;
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}
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for (plane = 0; plane < 3; plane++) {
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uint8_t *p = outpicref->data[plane] +
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(outlink->h - 1) * outpicref->linesize[plane] +
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uint8_t *p = outpicref->data[plane] + s->start_x +
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(outlink->h - 1 - s->start_y) * outpicref->linesize[plane] +
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s->xpos;
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for (y = 0; y < outlink->h; y++) {
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for (y = 0; y < s->h; y++) {
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*p = lrintf(av_clipf(s->combine_buffer[3 * y + plane], 0, 255));
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p -= outpicref->linesize[plane];
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}
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@ -640,27 +657,27 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
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} else {
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if (s->sliding == SCROLL) {
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for (plane = 0; plane < 3; plane++) {
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for (y = 1; y < outlink->h; y++) {
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for (y = 1; y < s->h; y++) {
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memmove(outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
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outpicref->data[plane] + (y ) * outpicref->linesize[plane],
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outlink->w);
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s->w);
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}
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}
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s->xpos = outlink->h - 1;
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s->xpos = s->h - 1;
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} else if (s->sliding == RSCROLL) {
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for (plane = 0; plane < 3; plane++) {
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for (y = outlink->h - 1; y >= 1; y--) {
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for (y = s->h - 1; y >= 1; y--) {
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memmove(outpicref->data[plane] + (y ) * outpicref->linesize[plane],
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outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
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outlink->w);
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s->w);
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}
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}
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s->xpos = 0;
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}
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for (plane = 0; plane < 3; plane++) {
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uint8_t *p = outpicref->data[plane] +
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s->xpos * outpicref->linesize[plane];
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for (x = 0; x < outlink->w; x++) {
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uint8_t *p = outpicref->data[plane] + s->start_x +
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(s->xpos + s->start_y) * outpicref->linesize[plane];
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for (x = 0; x < s->w; x++) {
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*p = lrintf(av_clipf(s->combine_buffer[3 * x + plane], 0, 255));
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p++;
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}
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@ -671,9 +688,9 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
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outpicref->pts = insamples->pts;
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s->xpos++;
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if (s->orientation == VERTICAL && s->xpos >= outlink->w)
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if (s->orientation == VERTICAL && s->xpos >= s->w)
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s->xpos = 0;
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if (s->orientation == HORIZONTAL && s->xpos >= outlink->h)
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if (s->orientation == HORIZONTAL && s->xpos >= s->h)
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s->xpos = 0;
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if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
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ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
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@ -832,11 +849,46 @@ static const AVOption showspectrumpic_options[] = {
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{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" },
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{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" },
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{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
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{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(showspectrumpic);
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static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
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{
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const uint8_t *font;
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int font_height;
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int i;
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font = avpriv_cga_font, font_height = 8;
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for (i = 0; txt[i]; i++) {
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int char_y, mask;
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if (o) {
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for (char_y = font_height - 1; char_y >= 0; char_y--) {
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uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
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for (mask = 0x80; mask; mask >>= 1) {
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if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
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p[char_y] = ~p[char_y];
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p += pic->linesize[0];
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}
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}
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} else {
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uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
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for (char_y = 0; char_y < font_height; char_y++) {
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for (mask = 0x80; mask; mask >>= 1) {
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if (font[txt[i] * font_height + char_y] & mask)
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*p = ~(*p);
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p++;
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}
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p += pic->linesize[0] - 8;
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}
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}
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}
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}
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static int showspectrumpic_request_frame(AVFilterLink *outlink)
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{
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ShowSpectrumContext *s = outlink->src->priv;
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@ -847,7 +899,7 @@ static int showspectrumpic_request_frame(AVFilterLink *outlink)
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if (ret == AVERROR_EOF && s->outpicref) {
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int samples = av_audio_fifo_size(s->fifo);
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int consumed = 0;
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int x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
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int y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
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int ch, spf, spb;
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AVFrame *fin;
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@ -892,6 +944,176 @@ static int showspectrumpic_request_frame(AVFilterLink *outlink)
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av_frame_free(&fin);
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s->outpicref->pts = 0;
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if (s->legend) {
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int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
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float spp = samples / (float)sz;
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uint8_t *dst;
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drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
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dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
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for (x = 0; x < s->w + 1; x++)
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dst[x] = 200;
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dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
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for (x = 0; x < s->w + 1; x++)
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dst[x] = 200;
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for (y = 0; y < s->h + 2; y++) {
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dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
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dst[s->start_x - 1] = 200;
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dst[s->start_x + s->w] = 200;
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}
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if (s->orientation == VERTICAL) {
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int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
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for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
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for (y = 0; y < h; y += 20) {
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dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0];
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dst[s->start_x - 2] = 200;
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dst[s->start_x + s->w + 1] = 200;
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}
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for (y = 0; y < h; y += 40) {
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dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0];
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dst[s->start_x - 3] = 200;
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dst[s->start_x + s->w + 2] = 200;
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}
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dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
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for (x = 0; x < s->w; x+=40)
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dst[x] = 200;
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dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
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for (x = 0; x < s->w; x+=80)
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dst[x] = 200;
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dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
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for (x = 0; x < s->w; x+=40) {
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dst[x] = 200;
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}
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dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
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for (x = 0; x < s->w; x+=80) {
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dst[x] = 200;
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}
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for (y = 0; y < h; y += 40) {
|
||||
float hz = y * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(h)));
|
||||
char *units;
|
||||
|
||||
if (hz == 0)
|
||||
units = av_asprintf("DC");
|
||||
else
|
||||
units = av_asprintf("%.2f", hz);
|
||||
if (!units)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4, units, 0);
|
||||
av_free(units);
|
||||
}
|
||||
}
|
||||
|
||||
for (x = 0; x < s->w; x+=80) {
|
||||
float seconds = x * spp / inlink->sample_rate;
|
||||
char *units;
|
||||
|
||||
if (x == 0)
|
||||
units = av_asprintf("0");
|
||||
else if (log10(seconds) > 6)
|
||||
units = av_asprintf("%.2fh", seconds / (60 * 60));
|
||||
else if (log10(seconds) > 3)
|
||||
units = av_asprintf("%.2fm", seconds / 60);
|
||||
else
|
||||
units = av_asprintf("%.2fs", seconds);
|
||||
if (!units)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->h + s->start_y + 6, units, 0);
|
||||
drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->start_y - 12, units, 0);
|
||||
av_free(units);
|
||||
}
|
||||
|
||||
drawtext(s->outpicref, outlink->w / 2 - 4 * 4, outlink->h - s->start_y / 2, "TIME", 0);
|
||||
drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 14 * 4, "FREQUENCY (Hz)", 1);
|
||||
} else {
|
||||
int w = s->mode == SEPARATE ? s->w / s->nb_display_channels : s->w;
|
||||
for (y = 0; y < s->h; y += 20) {
|
||||
dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
|
||||
dst[s->start_x - 2] = 200;
|
||||
dst[s->start_x + s->w + 1] = 200;
|
||||
}
|
||||
for (y = 0; y < s->h; y += 40) {
|
||||
dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
|
||||
dst[s->start_x - 3] = 200;
|
||||
dst[s->start_x + s->w + 2] = 200;
|
||||
}
|
||||
for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
|
||||
dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
||||
for (x = 0; x < w; x+=40)
|
||||
dst[x] = 200;
|
||||
dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
||||
for (x = 0; x < w; x+=80)
|
||||
dst[x] = 200;
|
||||
dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
||||
for (x = 0; x < w; x+=40) {
|
||||
dst[x] = 200;
|
||||
}
|
||||
dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
||||
for (x = 0; x < w; x+=80) {
|
||||
dst[x] = 200;
|
||||
}
|
||||
for (x = 0; x < w; x += 80) {
|
||||
float hz = x * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(w)));
|
||||
char *units;
|
||||
|
||||
if (hz == 0)
|
||||
units = av_asprintf("DC");
|
||||
else
|
||||
units = av_asprintf("%.2f", hz);
|
||||
if (!units)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->start_y - 12, units, 0);
|
||||
drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->h + s->start_y + 6, units, 0);
|
||||
av_free(units);
|
||||
}
|
||||
}
|
||||
for (y = 0; y < s->h; y+=40) {
|
||||
float seconds = y * spp / inlink->sample_rate;
|
||||
char *units;
|
||||
|
||||
if (x == 0)
|
||||
units = av_asprintf("0");
|
||||
else if (log10(seconds) > 6)
|
||||
units = av_asprintf("%.2fh", seconds / (60 * 60));
|
||||
else if (log10(seconds) > 3)
|
||||
units = av_asprintf("%.2fm", seconds / 60);
|
||||
else
|
||||
units = av_asprintf("%.2fs", seconds);
|
||||
if (!units)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, s->start_y + y - 4, units, 0);
|
||||
av_free(units);
|
||||
}
|
||||
drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 4 * 4, "TIME", 1);
|
||||
drawtext(s->outpicref, outlink->w / 2 - 14 * 4, outlink->h - s->start_y / 2, "FREQUENCY (Hz)", 0);
|
||||
}
|
||||
|
||||
for (ch = 0; ch < (multi ? s->nb_display_channels : 1); ch++) {
|
||||
int h = multi ? s->h / s->nb_display_channels : s->h;
|
||||
|
||||
for (y = 0; y < h; y++) {
|
||||
float out[3] = { 0., 127.5, 127.5};
|
||||
int chn;
|
||||
|
||||
for (chn = 0; chn < (s->mode == SEPARATE ? 1 : s->nb_display_channels); chn++) {
|
||||
float yf, uf, vf;
|
||||
int channel = (multi) ? s->nb_display_channels - ch - 1 : chn;
|
||||
|
||||
color_range(s, channel, &yf, &uf, &vf);
|
||||
pick_color(s, yf, uf, vf, y / (float)h, out);
|
||||
}
|
||||
memset(s->outpicref->data[0]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0] + s->w + s->start_x + 20, av_clip_uint8(out[0]), 10);
|
||||
memset(s->outpicref->data[1]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[1] + s->w + s->start_x + 20, av_clip_uint8(out[1]), 10);
|
||||
memset(s->outpicref->data[2]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[2] + s->w + s->start_x + 20, av_clip_uint8(out[2]), 10);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ret = ff_filter_frame(outlink, s->outpicref);
|
||||
s->outpicref = NULL;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user