#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
#include "libavutil/xga_font_data.h"
#include "audio.h"
#include "video.h"
#include "avfilter.h"
+#include "filters.h"
#include "internal.h"
#include "window_func.h"
enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
enum DataMode { D_MAGNITUDE, D_PHASE, NB_DMODES };
enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES };
-enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, NB_CLMODES };
+enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, MAGMA, GREEN, NB_CLMODES };
enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
typedef struct ShowSpectrumContext {
const AVClass *class;
int w, h;
+ char *rate_str;
+ AVRational auto_frame_rate;
+ AVRational frame_rate;
AVFrame *outpicref;
int nb_display_channels;
int orientation;
int scale;
float saturation; ///< color saturation multiplier
float rotation; ///< color rotation
+ int start, stop; ///< zoom mode
int data;
int xpos; ///< x position (current column)
FFTContext **fft; ///< Fast Fourier Transform context
+ FFTContext **ifft; ///< Inverse Fast Fourier Transform context
int fft_bits; ///< number of bits (FFT window size = 1<<fft_bits)
FFTComplex **fft_data; ///< bins holder for each (displayed) channels
+ FFTComplex **fft_scratch; ///< scratch buffers
float *window_func_lut; ///< Window function LUT
float **magnitudes;
float **phases;
int win_func;
int win_size;
+ int buf_size;
double win_scale;
float overlap;
float gain;
+ int consumed;
int hop_size;
float *combine_buffer; ///< color combining buffer (3 * h items)
float **color_buffer; ///< color buffer (3 * h * ch items)
AVAudioFifo *fifo;
int64_t pts;
+ int64_t old_pts;
+ int old_len;
int single_pic;
int legend;
int start_x, start_y;
{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" },
{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" },
{ "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, "color" },
+ { "magma", "magma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MAGMA}, 0, 0, FLAGS, "color" },
+ { "green", "green based coloring", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, FLAGS, "color" },
{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
{ "magnitude", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_MAGNITUDE}, 0, 0, FLAGS, "data" },
{ "phase", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_PHASE}, 0, 0, FLAGS, "data" },
{ "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
+ { "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 }
};
{ 0, 0, 0, 0 },
{ .15, 0, .5, -.5 },
{ 1, 1, -.5, .5 }},
+ [MAGMA] = {
+ { 0, 0, 0, 0 },
+ { 0.10, 23/256., (175-128)/256., (120-128)/256. },
+ { 0.23, 43/256., (158-128)/256., (144-128)/256. },
+ { 0.35, 85/256., (138-128)/256., (179-128)/256. },
+ { 0.48, 96/256., (128-128)/256., (189-128)/256. },
+ { 0.64, 128/256., (103-128)/256., (214-128)/256. },
+ { 0.78, 167/256., (85-128)/256., (174-128)/256. },
+ { 1, 205/256., (80-128)/256., (152-128)/256. }},
+ [GREEN] = {
+ { 0, 0, 0, 0 },
+ { .75, .5, 0, -.5 },
+ { 1, 1, 0, 0 }},
};
static av_cold void uninit(AVFilterContext *ctx)
av_fft_end(s->fft[i]);
}
av_freep(&s->fft);
+ if (s->ifft) {
+ for (i = 0; i < s->nb_display_channels; i++)
+ av_fft_end(s->ifft[i]);
+ }
+ av_freep(&s->ifft);
if (s->fft_data) {
for (i = 0; i < s->nb_display_channels; i++)
av_freep(&s->fft_data[i]);
}
av_freep(&s->fft_data);
+ if (s->fft_scratch) {
+ for (i = 0; i < s->nb_display_channels; i++)
+ av_freep(&s->fft_scratch[i]);
+ }
+ av_freep(&s->fft_scratch);
if (s->color_buffer) {
for (i = 0; i < s->nb_display_channels; i++)
av_freep(&s->color_buffer[i]);
return 0;
}
+static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ ShowSpectrumContext *s = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+ const float *window_func_lut = s->window_func_lut;
+ AVFrame *fin = arg;
+ const int ch = jobnr;
+ int n;
+
+ /* fill FFT input with the number of samples available */
+ const float *p = (float *)fin->extended_data[ch];
+
+ for (n = 0; n < s->win_size; n++) {
+ s->fft_data[ch][n].re = p[n] * window_func_lut[n];
+ s->fft_data[ch][n].im = 0;
+ }
+
+ if (s->stop) {
+ double theta, phi, psi, a, b, S, c;
+ FFTComplex *g = s->fft_data[ch];
+ FFTComplex *h = s->fft_scratch[ch];
+ int L = s->buf_size;
+ int N = s->win_size;
+ int M = s->win_size / 2;
+
+ phi = 2.0 * M_PI * (s->stop - s->start) / (double)inlink->sample_rate / (M - 1);
+ theta = 2.0 * M_PI * s->start / (double)inlink->sample_rate;
+
+ for (int n = 0; n < M; n++) {
+ h[n].re = cos(n * n / 2.0 * phi);
+ h[n].im = sin(n * n / 2.0 * phi);
+ }
+
+ for (int n = M; n < L; n++) {
+ h[n].re = 0.0;
+ h[n].im = 0.0;
+ }
+
+ for (int n = L - N; n < L; n++) {
+ h[n].re = cos((L - n) * (L - n) / 2.0 * phi);
+ h[n].im = sin((L - n) * (L - n) / 2.0 * phi);
+ }
+
+ for (int n = 0; n < N; n++) {
+ g[n].re = s->fft_data[ch][n].re;
+ g[n].im = s->fft_data[ch][n].im;
+ }
+
+ for (int n = N; n < L; n++) {
+ g[n].re = 0.;
+ g[n].im = 0.;
+ }
+
+ for (int n = 0; n < N; n++) {
+ psi = n * theta + n * n / 2.0 * phi;
+ c = cos(psi);
+ S = -sin(psi);
+ a = c * g[n].re - S * g[n].im;
+ b = S * g[n].re + c * g[n].im;
+ g[n].re = a;
+ g[n].im = b;
+ }
+
+ av_fft_permute(s->fft[ch], h);
+ av_fft_calc(s->fft[ch], h);
+
+ av_fft_permute(s->fft[ch], g);
+ av_fft_calc(s->fft[ch], g);
+
+ for (int n = 0; n < L; n++) {
+ c = g[n].re;
+ S = g[n].im;
+ a = c * h[n].re - S * h[n].im;
+ b = S * h[n].re + c * h[n].im;
+
+ g[n].re = a / L;
+ g[n].im = b / L;
+ }
+
+ av_fft_permute(s->ifft[ch], g);
+ av_fft_calc(s->ifft[ch], g);
+
+ for (int k = 0; k < M; k++) {
+ psi = k * k / 2.0 * phi;
+ c = cos(psi);
+ S = -sin(psi);
+ a = c * g[k].re - S * g[k].im;
+ b = S * g[k].re + c * g[k].im;
+ s->fft_data[ch][k].re = a;
+ s->fft_data[ch][k].im = b;
+ }
+ } else {
+ /* run FFT on each samples set */
+ av_fft_permute(s->fft[ch], s->fft_data[ch]);
+ av_fft_calc(s->fft[ch], s->fft_data[ch]);
+ }
+
+ 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;
int i, fft_bits, h, w;
float overlap;
- s->pts = AV_NOPTS_VALUE;
+ s->stop = FFMIN(s->stop, inlink->sample_rate / 2);
+ if (s->stop && s->stop <= s->start) {
+ av_log(ctx, AV_LOG_ERROR, "Stop frequency should be greater than start.\n");
+ return AVERROR(EINVAL);
+ }
if (!strcmp(ctx->filter->name, "showspectrumpic"))
s->single_pic = 1;
outlink->sample_aspect_ratio = (AVRational){1,1};
if (s->legend) {
- s->start_x = log10(inlink->sample_rate) * 25;
+ s->start_x = (log10(inlink->sample_rate) + 1) * 25;
s->start_y = 64;
outlink->w += s->start_x * 2;
outlink->h += s->start_y * 2;
/* FFT window size (precision) according to the requested output frame width */
for (fft_bits = 1; 1 << fft_bits < 2 * w; fft_bits++);
}
+
s->win_size = 1 << fft_bits;
+ s->buf_size = s->win_size << !!s->stop;
if (!s->fft) {
s->fft = av_calloc(inlink->channels, sizeof(*s->fft));
return AVERROR(ENOMEM);
}
+ if (s->stop) {
+ if (!s->ifft) {
+ s->ifft = av_calloc(inlink->channels, sizeof(*s->ifft));
+ if (!s->ifft)
+ return AVERROR(ENOMEM);
+ }
+ }
+
/* (re-)configuration if the video output changed (or first init) */
if (fft_bits != s->fft_bits) {
AVFrame *outpicref;
* Note: we use free and malloc instead of a realloc-like function to
* make sure the buffer is aligned in memory for the FFT functions. */
for (i = 0; i < s->nb_display_channels; i++) {
+ if (s->stop) {
+ av_fft_end(s->ifft[i]);
+ av_freep(&s->fft_scratch[i]);
+ }
av_fft_end(s->fft[i]);
av_freep(&s->fft_data[i]);
}
s->nb_display_channels = inlink->channels;
for (i = 0; i < s->nb_display_channels; i++) {
- s->fft[i] = av_fft_init(fft_bits, 0);
+ s->fft[i] = av_fft_init(fft_bits + !!s->stop, 0);
+ if (s->stop) {
+ s->ifft[i] = av_fft_init(fft_bits + !!s->stop, 1);
+ if (!s->ifft[i]) {
+ av_log(ctx, AV_LOG_ERROR, "Unable to create Inverse FFT context. "
+ "The window size might be too high.\n");
+ return AVERROR(EINVAL);
+ }
+ }
if (!s->fft[i]) {
av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
"The window size might be too high.\n");
s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data));
if (!s->fft_data)
return AVERROR(ENOMEM);
+ s->fft_scratch = av_calloc(s->nb_display_channels, sizeof(*s->fft_scratch));
+ if (!s->fft_scratch)
+ return AVERROR(ENOMEM);
for (i = 0; i < s->nb_display_channels; i++) {
- s->fft_data[i] = av_calloc(s->win_size, sizeof(**s->fft_data));
+ s->fft_data[i] = av_calloc(s->buf_size, sizeof(**s->fft_data));
if (!s->fft_data[i])
return AVERROR(ENOMEM);
+
+ s->fft_scratch[i] = av_calloc(s->buf_size, sizeof(**s->fft_scratch));
+ if (!s->fft_scratch[i])
+ return AVERROR(ENOMEM);
}
/* pre-calc windowing function */
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) ||
(s->orientation == HORIZONTAL && s->xpos >= s->h))
s->xpos = 0;
- outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap));
+ s->auto_frame_rate = av_make_q(inlink->sample_rate, s->hop_size);
if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
- outlink->frame_rate.den *= s->w;
+ s->auto_frame_rate.den *= s->w;
if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
- outlink->frame_rate.den *= s->h;
+ s->auto_frame_rate.den *= s->h;
+ if (!s->single_pic && strcmp(s->rate_str, "auto")) {
+ int ret = av_parse_video_rate(&s->frame_rate, s->rate_str);
+ if (ret < 0)
+ return ret;
+ } else {
+ s->frame_rate = s->auto_frame_rate;
+ }
+ outlink->frame_rate = s->frame_rate;
+ outlink->time_base = av_inv_q(outlink->frame_rate);
if (s->orientation == VERTICAL) {
s->combine_buffer =
return 0;
}
-static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
-{
- ShowSpectrumContext *s = ctx->priv;
- const float *window_func_lut = s->window_func_lut;
- AVFrame *fin = arg;
- const int ch = jobnr;
- int n;
-
- /* fill FFT input with the number of samples available */
- const float *p = (float *)fin->extended_data[ch];
-
- for (n = 0; n < s->win_size; n++) {
- s->fft_data[ch][n].re = p[n] * window_func_lut[n];
- s->fft_data[ch][n].im = 0;
- }
-
- /* run FFT on each samples set */
- av_fft_permute(s->fft[ch], s->fft_data[ch]);
- av_fft_calc(s->fft[ch], s->fft_data[ch]);
-
- return 0;
-}
-
#define RE(y, ch) s->fft_data[ch][y].re
#define IM(y, ch) s->fft_data[ch][y].im
#define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, ch))
}
}
-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 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;
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);
}
}
} 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);
}
}
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);
}
}
} 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);
}
}
}
if (s->sliding != FULLFRAME || s->xpos == 0)
- outpicref->pts = insamples->pts;
+ outpicref->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
s->xpos++;
if (s->orientation == VERTICAL && s->xpos >= s->w)
if (s->orientation == HORIZONTAL && s->xpos >= s->h)
s->xpos = 0;
if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
- ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
- if (ret < 0)
- return ret;
+ 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)
+ return ret;
+ return 0;
+ }
}
- return s->win_size;
+ return 1;
}
#if CONFIG_SHOWSPECTRUM_FILTER
-static int request_frame(AVFilterLink *outlink)
+static int activate(AVFilterContext *ctx)
{
- ShowSpectrumContext *s = outlink->src->priv;
- AVFilterLink *inlink = outlink->src->inputs[0];
- unsigned i;
+ AVFilterLink *inlink = ctx->inputs[0];
+ AVFilterLink *outlink = ctx->outputs[0];
+ ShowSpectrumContext *s = ctx->priv;
int ret;
- ret = ff_request_frame(inlink);
- if (ret == AVERROR_EOF && s->sliding == FULLFRAME && s->xpos > 0 &&
- s->outpicref) {
- if (s->orientation == VERTICAL) {
- for (i = 0; i < outlink->h; i++) {
- memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos);
- memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos);
- memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos);
- }
- } else {
- for (i = s->xpos; i < outlink->h; i++) {
- memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w);
- memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w);
- memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w);
- }
- }
- ret = ff_filter_frame(outlink, s->outpicref);
- s->outpicref = NULL;
- }
-
- return ret;
-}
+ FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
-static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
-{
- AVFilterContext *ctx = inlink->dst;
- ShowSpectrumContext *s = ctx->priv;
- AVFrame *fin = NULL;
- int ret = 0, consumed = 0;
+ if (av_audio_fifo_size(s->fifo) < s->win_size) {
+ AVFrame *frame = NULL;
- if (s->pts == AV_NOPTS_VALUE)
- s->pts = insamples->pts - av_audio_fifo_size(s->fifo);
+ ret = ff_inlink_consume_frame(inlink, &frame);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ s->pts = frame->pts;
+ s->consumed = 0;
- av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples);
- av_frame_free(&insamples);
- while (av_audio_fifo_size(s->fifo) >= s->win_size) {
- fin = ff_get_audio_buffer(inlink, s->win_size);
- if (!fin) {
- ret = AVERROR(ENOMEM);
- goto fail;
+ av_audio_fifo_write(s->fifo, (void **)frame->extended_data, frame->nb_samples);
+ av_frame_free(&frame);
}
+ }
- fin->pts = s->pts + consumed;
- consumed += s->hop_size;
- ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
- if (ret < 0)
- goto fail;
+ if (s->outpicref && av_audio_fifo_size(s->fifo) >= s->win_size) {
+ AVFrame *fin = ff_get_audio_buffer(inlink, s->win_size);
+ if (!fin)
+ return AVERROR(ENOMEM);
+
+ fin->pts = s->pts + s->consumed;
+ s->consumed += s->hop_size;
+ ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data,
+ FFMIN(s->win_size, av_audio_fifo_size(s->fifo)));
+ if (ret < 0) {
+ av_frame_free(&fin);
+ return ret;
+ }
av_assert0(fin->nb_samples == s->win_size);
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)
- goto fail;
+ if (ret <= 0)
+ return ret;
}
-fail:
- s->pts = AV_NOPTS_VALUE;
- av_frame_free(&fin);
- return ret;
+ if (ff_outlink_get_status(inlink) == AVERROR_EOF &&
+ s->sliding == FULLFRAME &&
+ s->xpos > 0 && s->outpicref) {
+ int64_t pts;
+
+ if (s->orientation == VERTICAL) {
+ for (int i = 0; i < outlink->h; i++) {
+ memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos);
+ memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos);
+ memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos);
+ }
+ } else {
+ for (int i = s->xpos; i < outlink->h; i++) {
+ memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w);
+ memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w);
+ memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w);
+ }
+ }
+ s->outpicref->pts += s->consumed;
+ pts = s->outpicref->pts;
+ ret = ff_filter_frame(outlink, s->outpicref);
+ s->outpicref = NULL;
+ ff_outlink_set_status(outlink, AVERROR_EOF, pts);
+ return 0;
+ }
+
+ FF_FILTER_FORWARD_STATUS(inlink, outlink);
+ if (ff_outlink_frame_wanted(outlink) && av_audio_fifo_size(s->fifo) < s->win_size) {
+ ff_inlink_request_frame(inlink);
+ return 0;
+ }
+
+ if (av_audio_fifo_size(s->fifo) >= s->win_size) {
+ ff_filter_set_ready(ctx, 10);
+ return 0;
+ }
+ return FFERROR_NOT_READY;
}
static const AVFilterPad showspectrum_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
- .filter_frame = filter_frame,
},
{ NULL }
};
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
- .request_frame = request_frame,
},
{ NULL }
};
.priv_size = sizeof(ShowSpectrumContext),
.inputs = showspectrum_inputs,
.outputs = showspectrum_outputs,
+ .activate = activate,
.priv_class = &showspectrum_class,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};
{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" },
{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" },
{ "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, "color" },
+ { "magma", "magma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MAGMA}, 0, 0, FLAGS, "color" },
+ { "green", "green based coloring", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, FLAGS, "color" },
{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, "scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
{ "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
+ { "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 },
{ NULL }
};
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;
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;
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);
-
- 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 hertz = y * (inlink->sample_rate / 2) / (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 hertz = x * (inlink->sample_rate / 2) / (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;