[FFmpeg-cvslog] avfilter/avf_showspectrum: add legend support to showspectrum filter
Paul B Mahol
git at videolan.org
Sun Oct 7 13:19:52 EEST 2018
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sun Oct 7 12:10:59 2018 +0200| [9c120b4d4201edad9381ec7fe292de36c785fab7] | committer: Paul B Mahol
avfilter/avf_showspectrum: add legend support to showspectrum filter
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9c120b4d4201edad9381ec7fe292de36c785fab7
---
doc/filters.texi | 3 +
libavfilter/avf_showspectrum.c | 730 +++++++++++++++++++++--------------------
2 files changed, 385 insertions(+), 348 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index c0ec41df8a..2ed0aa2854 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -20730,6 +20730,9 @@ Set stop frequency to which to display spectrogram. Default is @code{0}.
@item fps
Set upper frame rate limit. Default is @code{auto}, unlimited.
+
+ at item legend
+Draw time and frequency axes and legends. Default is disabled.
@end table
The usage is very similar to the showwaves filter; see the examples in that
diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 883413b468..41693a0ce1 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -91,6 +91,7 @@ typedef struct ShowSpectrumContext {
AVAudioFifo *fifo;
int64_t pts;
int64_t old_pts;
+ int old_len;
int single_pic;
int legend;
int start_x, start_y;
@@ -163,6 +164,7 @@ static const AVOption showspectrum_options[] = {
{ "start", "start frequency", OFFSET(start), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
{ "stop", "stop frequency", OFFSET(stop), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
{ "fps", "set video rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "auto"}, 0, 0, FLAGS },
+ { "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
{ NULL }
};
@@ -430,6 +432,346 @@ static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jo
return 0;
}
+static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
+{
+ const uint8_t *font;
+ int font_height;
+ int i;
+
+ font = avpriv_cga_font, font_height = 8;
+
+ for (i = 0; txt[i]; i++) {
+ int char_y, mask;
+
+ if (o) {
+ for (char_y = font_height - 1; char_y >= 0; char_y--) {
+ uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
+ for (mask = 0x80; mask; mask >>= 1) {
+ if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
+ p[char_y] = ~p[char_y];
+ p += pic->linesize[0];
+ }
+ }
+ } else {
+ uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
+ for (char_y = 0; char_y < font_height; char_y++) {
+ for (mask = 0x80; mask; mask >>= 1) {
+ if (font[txt[i] * font_height + char_y] & mask)
+ *p = ~(*p);
+ p++;
+ }
+ p += pic->linesize[0] - 8;
+ }
+ }
+ }
+}
+
+static void color_range(ShowSpectrumContext *s, int ch,
+ float *yf, float *uf, float *vf)
+{
+ switch (s->mode) {
+ case COMBINED:
+ // reduce range by channel count
+ *yf = 256.0f / s->nb_display_channels;
+ switch (s->color_mode) {
+ case RAINBOW:
+ case MORELAND:
+ case NEBULAE:
+ case FIRE:
+ case FIERY:
+ case FRUIT:
+ case COOL:
+ case GREEN:
+ case MAGMA:
+ case INTENSITY:
+ *uf = *yf;
+ *vf = *yf;
+ break;
+ case CHANNEL:
+ /* adjust saturation for mixed UV coloring */
+ /* this factor is correct for infinite channels, an approximation otherwise */
+ *uf = *yf * M_PI;
+ *vf = *yf * M_PI;
+ break;
+ default:
+ av_assert0(0);
+ }
+ break;
+ case SEPARATE:
+ // full range
+ *yf = 256.0f;
+ *uf = 256.0f;
+ *vf = 256.0f;
+ break;
+ default:
+ av_assert0(0);
+ }
+
+ if (s->color_mode == CHANNEL) {
+ if (s->nb_display_channels > 1) {
+ *uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
+ *vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
+ } else {
+ *uf *= 0.5 * sin(M_PI * s->rotation);
+ *vf *= 0.5 * cos(M_PI * s->rotation + M_PI_2);
+ }
+ } else {
+ *uf += *uf * sin(M_PI * s->rotation);
+ *vf += *vf * cos(M_PI * s->rotation + M_PI_2);
+ }
+
+ *uf *= s->saturation;
+ *vf *= s->saturation;
+}
+
+static void pick_color(ShowSpectrumContext *s,
+ float yf, float uf, float vf,
+ float a, float *out)
+{
+ if (s->color_mode > CHANNEL) {
+ const int cm = s->color_mode;
+ float y, u, v;
+ int i;
+
+ for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++)
+ if (color_table[cm][i].a >= a)
+ break;
+ // i now is the first item >= the color
+ // now we know to interpolate between item i - 1 and i
+ if (a <= color_table[cm][i - 1].a) {
+ y = color_table[cm][i - 1].y;
+ u = color_table[cm][i - 1].u;
+ v = color_table[cm][i - 1].v;
+ } else if (a >= color_table[cm][i].a) {
+ y = color_table[cm][i].y;
+ u = color_table[cm][i].u;
+ v = color_table[cm][i].v;
+ } else {
+ float start = color_table[cm][i - 1].a;
+ float end = color_table[cm][i].a;
+ float lerpfrac = (a - start) / (end - start);
+ y = color_table[cm][i - 1].y * (1.0f - lerpfrac)
+ + color_table[cm][i].y * lerpfrac;
+ u = color_table[cm][i - 1].u * (1.0f - lerpfrac)
+ + color_table[cm][i].u * lerpfrac;
+ v = color_table[cm][i - 1].v * (1.0f - lerpfrac)
+ + color_table[cm][i].v * lerpfrac;
+ }
+
+ out[0] = y * yf;
+ out[1] = u * uf;
+ out[2] = v * vf;
+ } else {
+ out[0] = a * yf;
+ out[1] = a * uf;
+ out[2] = a * vf;
+ }
+}
+
+static char *get_time(AVFilterContext *ctx, float seconds, int x)
+{
+ 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);
+ return units;
+}
+
+static int draw_legend(AVFilterContext *ctx, int samples)
+{
+ ShowSpectrumContext *s = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+ AVFilterLink *outlink = ctx->outputs[0];
+ int ch, y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
+ int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
+ float spp = samples / (float)sz;
+ char *text;
+ uint8_t *dst;
+ char chlayout_str[128];
+
+ av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), inlink->channels,
+ inlink->channel_layout);
+
+ text = av_asprintf("%d Hz | %s", inlink->sample_rate, chlayout_str);
+
+ drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
+ drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, outlink->h - 10, text, 0);
+ if (s->stop) {
+ char *text = av_asprintf("Zoom: %d Hz - %d Hz", s->start, s->stop);
+ drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, 3, text, 0);
+ av_freep(&text);
+ }
+
+ av_freep(&text);
+
+ dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
+ for (x = 0; x < s->w + 1; x++)
+ dst[x] = 200;
+ dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
+ for (x = 0; x < s->w + 1; x++)
+ dst[x] = 200;
+ for (y = 0; y < s->h + 2; y++) {
+ dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
+ dst[s->start_x - 1] = 200;
+ dst[s->start_x + s->w] = 200;
+ }
+ if (s->orientation == VERTICAL) {
+ int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
+ int hh = s->mode == SEPARATE ? -(s->h % s->nb_display_channels) + 1 : 1;
+ for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
+ for (y = 0; y < h; y += 20) {
+ dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
+ dst[s->start_x - 2] = 200;
+ dst[s->start_x + s->w + 1] = 200;
+ }
+ for (y = 0; y < h; y += 40) {
+ dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
+ dst[s->start_x - 3] = 200;
+ dst[s->start_x + s->w + 2] = 200;
+ }
+ dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
+ for (x = 0; x < s->w; x+=40)
+ dst[x] = 200;
+ dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
+ for (x = 0; x < s->w; x+=80)
+ dst[x] = 200;
+ dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
+ for (x = 0; x < s->w; x+=40) {
+ dst[x] = 200;
+ }
+ dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
+ for (x = 0; x < s->w; x+=80) {
+ dst[x] = 200;
+ }
+ for (y = 0; y < h; y += 40) {
+ float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
+ float hertz = s->start + y * range / (float)(1 << (int)ceil(log2(h)));
+ char *units;
+
+ if (hertz == 0)
+ units = av_asprintf("DC");
+ else
+ units = av_asprintf("%.2f", hertz);
+ if (!units)
+ return AVERROR(ENOMEM);
+
+ drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4 - hh, units, 0);
+ av_free(units);
+ }
+ }
+
+ for (x = 0; x < s->w && s->single_pic; x+=80) {
+ float seconds = x * spp / inlink->sample_rate;
+ char *units = get_time(ctx, seconds, x);
+
+ 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 - 79; x += 80) {
+ float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
+ float hertz = s->start + x * range / (float)(1 << (int)ceil(log2(w)));
+ char *units;
+
+ if (hertz == 0)
+ units = av_asprintf("DC");
+ else
+ units = av_asprintf("%.2f", hertz);
+ 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 && s->single_pic; y+=40) {
+ float seconds = y * spp / inlink->sample_rate;
+ char *units = get_time(ctx, seconds, x);
+
+ 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;
+ float lout[3];
+
+ color_range(s, channel, &yf, &uf, &vf);
+ pick_color(s, yf, uf, vf, y / (float)h, lout);
+ out[0] += lout[0];
+ out[1] += lout[1];
+ out[2] += lout[2];
+ }
+ 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);
+ }
+
+ for (y = 0; ch == 0 && y < h; y += h / 10) {
+ float value = 120.0 * log10(1. - y / (float)h);
+ char *text;
+
+ if (value < -120)
+ break;
+ text = av_asprintf("%.0f dB", value);
+ if (!text)
+ continue;
+ drawtext(s->outpicref, s->w + s->start_x + 35, s->start_y + y - 5, text, 0);
+ av_free(text);
+ }
+ }
+
+ return 0;
+}
+
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
@@ -602,6 +944,9 @@ static int config_output(AVFilterLink *outlink)
memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
}
outpicref->color_range = AVCOL_RANGE_JPEG;
+
+ if (!s->single_pic && s->legend)
+ draw_legend(ctx, 0);
}
if ((s->orientation == VERTICAL && s->xpos >= s->w) ||
@@ -703,108 +1048,6 @@ static void scale_magnitudes(ShowSpectrumContext *s, float scale)
}
}
-static void color_range(ShowSpectrumContext *s, int ch,
- float *yf, float *uf, float *vf)
-{
- switch (s->mode) {
- case COMBINED:
- // reduce range by channel count
- *yf = 256.0f / s->nb_display_channels;
- switch (s->color_mode) {
- case RAINBOW:
- case MORELAND:
- case NEBULAE:
- case FIRE:
- case FIERY:
- case FRUIT:
- case COOL:
- case GREEN:
- case MAGMA:
- case INTENSITY:
- *uf = *yf;
- *vf = *yf;
- break;
- case CHANNEL:
- /* adjust saturation for mixed UV coloring */
- /* this factor is correct for infinite channels, an approximation otherwise */
- *uf = *yf * M_PI;
- *vf = *yf * M_PI;
- break;
- default:
- av_assert0(0);
- }
- break;
- case SEPARATE:
- // full range
- *yf = 256.0f;
- *uf = 256.0f;
- *vf = 256.0f;
- break;
- default:
- av_assert0(0);
- }
-
- if (s->color_mode == CHANNEL) {
- if (s->nb_display_channels > 1) {
- *uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
- *vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
- } else {
- *uf *= 0.5 * sin(M_PI * s->rotation);
- *vf *= 0.5 * cos(M_PI * s->rotation + M_PI_2);
- }
- } else {
- *uf += *uf * sin(M_PI * s->rotation);
- *vf += *vf * cos(M_PI * s->rotation + M_PI_2);
- }
-
- *uf *= s->saturation;
- *vf *= s->saturation;
-}
-
-static void pick_color(ShowSpectrumContext *s,
- float yf, float uf, float vf,
- float a, float *out)
-{
- if (s->color_mode > CHANNEL) {
- const int cm = s->color_mode;
- float y, u, v;
- int i;
-
- for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++)
- if (color_table[cm][i].a >= a)
- break;
- // i now is the first item >= the color
- // now we know to interpolate between item i - 1 and i
- if (a <= color_table[cm][i - 1].a) {
- y = color_table[cm][i - 1].y;
- u = color_table[cm][i - 1].u;
- v = color_table[cm][i - 1].v;
- } else if (a >= color_table[cm][i].a) {
- y = color_table[cm][i].y;
- u = color_table[cm][i].u;
- v = color_table[cm][i].v;
- } else {
- float start = color_table[cm][i - 1].a;
- float end = color_table[cm][i].a;
- float lerpfrac = (a - start) / (end - start);
- y = color_table[cm][i - 1].y * (1.0f - lerpfrac)
- + color_table[cm][i].y * lerpfrac;
- u = color_table[cm][i - 1].u * (1.0f - lerpfrac)
- + color_table[cm][i].u * lerpfrac;
- v = color_table[cm][i - 1].v * (1.0f - lerpfrac)
- + color_table[cm][i].v * lerpfrac;
- }
-
- out[0] = y * yf;
- out[1] = u * uf;
- out[2] = v * vf;
- } else {
- out[0] = a * yf;
- out[1] = a * uf;
- out[2] = a * vf;
- }
-}
-
static void clear_combine_buffer(ShowSpectrumContext *s, int size)
{
int y;
@@ -904,8 +1147,8 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
if (s->sliding == SCROLL) {
for (plane = 0; plane < 3; plane++) {
for (y = 0; y < s->h; y++) {
- uint8_t *p = outpicref->data[plane] +
- y * outpicref->linesize[plane];
+ uint8_t *p = outpicref->data[plane] + s->start_x +
+ (y + s->start_y) * outpicref->linesize[plane];
memmove(p, p + 1, s->w - 1);
}
}
@@ -913,8 +1156,8 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
} else if (s->sliding == RSCROLL) {
for (plane = 0; plane < 3; plane++) {
for (y = 0; y < s->h; y++) {
- uint8_t *p = outpicref->data[plane] +
- y * outpicref->linesize[plane];
+ uint8_t *p = outpicref->data[plane] + s->start_x +
+ (y + s->start_y) * outpicref->linesize[plane];
memmove(p + 1, p, s->w - 1);
}
}
@@ -933,8 +1176,8 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
if (s->sliding == SCROLL) {
for (plane = 0; plane < 3; plane++) {
for (y = 1; y < s->h; y++) {
- memmove(outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
- outpicref->data[plane] + (y ) * outpicref->linesize[plane],
+ memmove(outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
+ outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
s->w);
}
}
@@ -942,8 +1185,8 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
} else if (s->sliding == RSCROLL) {
for (plane = 0; plane < 3; plane++) {
for (y = s->h - 1; y >= 1; y--) {
- memmove(outpicref->data[plane] + (y ) * outpicref->linesize[plane],
- outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
+ memmove(outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
+ outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
s->w);
}
}
@@ -969,6 +1212,31 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
s->xpos = 0;
if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
if (s->old_pts < outpicref->pts) {
+ if (s->legend) {
+ char *units = get_time(ctx, insamples->pts /(float)inlink->sample_rate, x);
+
+ if (s->orientation == VERTICAL) {
+ for (y = 0; y < 10; y++) {
+ memset(s->outpicref->data[0] + outlink->w / 2 - 4 * s->old_len +
+ (outlink->h - s->start_y / 2 - 20 + y) * s->outpicref->linesize[0], 0, 10 * s->old_len);
+ }
+ drawtext(s->outpicref,
+ outlink->w / 2 - 4 * strlen(units),
+ outlink->h - s->start_y / 2 - 20,
+ units, 0);
+ } else {
+ for (y = 0; y < 10 * s->old_len; y++) {
+ memset(s->outpicref->data[0] + s->start_x / 7 + 20 +
+ (outlink->h / 2 - 4 * s->old_len + y) * s->outpicref->linesize[0], 0, 10);
+ }
+ drawtext(s->outpicref,
+ s->start_x / 7 + 20,
+ outlink->h / 2 - 4 * strlen(units),
+ units, 1);
+ }
+ s->old_len = strlen(units);
+ av_free(units);
+ }
s->old_pts = outpicref->pts;
ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
if (ret < 0)
@@ -1031,6 +1299,7 @@ static int activate(AVFilterContext *ctx)
ctx->internal->execute(ctx, calc_channel_phases, NULL, NULL, s->nb_display_channels);
ret = plot_spectrum_column(inlink, fin);
+
av_frame_free(&fin);
av_audio_fifo_drain(s->fifo, s->hop_size);
if (ret <= 0)
@@ -1169,40 +1438,6 @@ static const AVOption showspectrumpic_options[] = {
AVFILTER_DEFINE_CLASS(showspectrumpic);
-static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
-{
- const uint8_t *font;
- int font_height;
- int i;
-
- font = avpriv_cga_font, font_height = 8;
-
- for (i = 0; txt[i]; i++) {
- int char_y, mask;
-
- if (o) {
- for (char_y = font_height - 1; char_y >= 0; char_y--) {
- uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
- for (mask = 0x80; mask; mask >>= 1) {
- if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
- p[char_y] = ~p[char_y];
- p += pic->linesize[0];
- }
- }
- } else {
- uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
- for (char_y = 0; char_y < font_height; char_y++) {
- for (mask = 0x80; mask; mask >>= 1) {
- if (font[txt[i] * font_height + char_y] & mask)
- *p = ~(*p);
- p++;
- }
- p += pic->linesize[0] - 8;
- }
- }
- }
-}
-
static int showspectrumpic_request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
@@ -1214,7 +1449,7 @@ static int showspectrumpic_request_frame(AVFilterLink *outlink)
samples = av_audio_fifo_size(s->fifo);
if (ret == AVERROR_EOF && s->outpicref && samples > 0) {
int consumed = 0;
- int y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
+ int x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
int ch, spf, spb;
AVFrame *fin;
@@ -1262,209 +1497,8 @@ static int showspectrumpic_request_frame(AVFilterLink *outlink)
av_frame_free(&fin);
s->outpicref->pts = 0;
- if (s->legend) {
- int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
- float spp = samples / (float)sz;
- char *text;
- uint8_t *dst;
- char chlayout_str[128];
-
- av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), inlink->channels,
- inlink->channel_layout);
-
- text = av_asprintf("%d Hz | %s", inlink->sample_rate, chlayout_str);
-
- drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
- drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, outlink->h - 10, text, 0);
- if (s->stop) {
- char *text = av_asprintf("Zoom: %d Hz - %d Hz", s->start, s->stop);
- drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, 3, text, 0);
- av_freep(&text);
- }
-
- av_freep(&text);
-
- dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
- for (x = 0; x < s->w + 1; x++)
- dst[x] = 200;
- dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
- for (x = 0; x < s->w + 1; x++)
- dst[x] = 200;
- for (y = 0; y < s->h + 2; y++) {
- dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
- dst[s->start_x - 1] = 200;
- dst[s->start_x + s->w] = 200;
- }
- if (s->orientation == VERTICAL) {
- int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
- int hh = s->mode == SEPARATE ? -(s->h % s->nb_display_channels) + 1 : 1;
- for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
- for (y = 0; y < h; y += 20) {
- dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
- dst[s->start_x - 2] = 200;
- dst[s->start_x + s->w + 1] = 200;
- }
- for (y = 0; y < h; y += 40) {
- dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
- dst[s->start_x - 3] = 200;
- dst[s->start_x + s->w + 2] = 200;
- }
- dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
- for (x = 0; x < s->w; x+=40)
- dst[x] = 200;
- dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
- for (x = 0; x < s->w; x+=80)
- dst[x] = 200;
- dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
- for (x = 0; x < s->w; x+=40) {
- dst[x] = 200;
- }
- dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
- for (x = 0; x < s->w; x+=80) {
- dst[x] = 200;
- }
- for (y = 0; y < h; y += 40) {
- float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
- float hertz = s->start + y * range / (float)(1 << (int)ceil(log2(h)));
- char *units;
-
- if (hertz == 0)
- units = av_asprintf("DC");
- else
- units = av_asprintf("%.2f", hertz);
- if (!units)
- return AVERROR(ENOMEM);
-
- drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4 - hh, 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 - 79; x += 80) {
- float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
- float hertz = s->start + x * range / (float)(1 << (int)ceil(log2(w)));
- char *units;
-
- if (hertz == 0)
- units = av_asprintf("DC");
- else
- units = av_asprintf("%.2f", hertz);
- 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;
- float lout[3];
-
- color_range(s, channel, &yf, &uf, &vf);
- pick_color(s, yf, uf, vf, y / (float)h, lout);
- out[0] += lout[0];
- out[1] += lout[1];
- out[2] += lout[2];
- }
- 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);
- }
-
- for (y = 0; ch == 0 && y < h; y += h / 10) {
- float value = 120.0 * log10(1. - y / (float)h);
- char *text;
-
- if (value < -120)
- break;
- text = av_asprintf("%.0f dB", value);
- if (!text)
- continue;
- drawtext(s->outpicref, s->w + s->start_x + 35, s->start_y + y - 5, text, 0);
- av_free(text);
- }
- }
- }
+ if (s->legend)
+ draw_legend(ctx, samples);
ret = ff_filter_frame(outlink, s->outpicref);
s->outpicref = NULL;
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