#include "libavcodec/avfft.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
+#include "libavutil/xga_font_data.h"
#include "audio.h"
#include "video.h"
#include "avfilter.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, NB_CLMODES };
+enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, NB_CLMODES };
enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
int color_mode; ///< display color scheme
int scale;
float saturation; ///< color saturation multiplier
+ int data;
int xpos; ///< x position (current column)
FFTContext *fft; ///< 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
float *window_func_lut; ///< Window function LUT
float **magnitudes;
+ float **phases;
int win_func;
int win_size;
double win_scale;
float overlap;
- int skip_samples;
+ float gain;
+ int hop_size;
float *combine_buffer; ///< color combining buffer (3 * h items)
AVAudioFifo *fifo;
int64_t pts;
int single_pic;
+ int legend;
+ int start_x, start_y;
} ShowSpectrumContext;
#define OFFSET(x) offsetof(ShowSpectrumContext, x)
{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" },
{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" },
{ "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" },
{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
{ "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" },
{ "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" },
{ "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" },
+ { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" },
{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" },
{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" },
{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" },
{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, 1, FLAGS },
+ { "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
+ { "data", "set data mode", OFFSET(data), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_DMODES-1, FLAGS, "data" },
+ { "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" },
{ NULL }
};
{ 0.77, 193/256., (40-128)/256., (155-128)/256. },
{ 0.87, 221/256., (101-128)/256., (134-128)/256. },
{ 1, 1, 0, 0 }},
+ [FRUIT] = {
+ { 0, 0, 0, 0 },
+ { 0.20, 29/256., (136-128)/256., (119-128)/256. },
+ { 0.30, 60/256., (119-128)/256., (90-128)/256. },
+ { 0.40, 85/256., (91-128)/256., (85-128)/256. },
+ { 0.50, 116/256., (70-128)/256., (105-128)/256. },
+ { 0.60, 151/256., (50-128)/256., (146-128)/256. },
+ { 0.70, 191/256., (63-128)/256., (178-128)/256. },
+ { 1, 98/256., (80-128)/256., (221-128)/256. }},
+ [COOL] = {
+ { 0, 0, 0, 0 },
+ { .15, 0, .5, -.5 },
+ { 1, 1, -.5, .5 }},
};
static av_cold void uninit(AVFilterContext *ctx)
av_freep(&s->magnitudes);
av_frame_free(&s->outpicref);
av_audio_fifo_free(s->fifo);
+ if (s->phases) {
+ for (i = 0; i < s->nb_display_channels; i++)
+ av_freep(&s->phases[i]);
+ }
+ av_freep(&s->phases);
}
static int query_formats(AVFilterContext *ctx)
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
- static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE };
+ static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE };
int ret;
/* set input audio formats */
outlink->w = s->w;
outlink->h = s->h;
- h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? outlink->h : outlink->h / inlink->channels;
- w = (s->mode == COMBINED || s->orientation == VERTICAL) ? outlink->w : outlink->w / inlink->channels;
+ if (s->legend) {
+ s->start_x = log10(inlink->sample_rate) * 25;
+ s->start_y = 64;
+ outlink->w += s->start_x * 2;
+ outlink->h += s->start_y * 2;
+ }
+
+ h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->channels;
+ w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->channels;
s->channel_height = h;
s->channel_width = w;
return AVERROR(ENOMEM);
}
+ s->phases = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes));
+ if (!s->phases)
+ return AVERROR(ENOMEM);
+ for (i = 0; i < s->nb_display_channels; i++) {
+ s->phases[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->phases));
+ if (!s->phases[i])
+ return AVERROR(ENOMEM);
+ }
+
s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data));
if (!s->fft_data)
return AVERROR(ENOMEM);
ff_generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
if (s->overlap == 1)
s->overlap = overlap;
- s->skip_samples = (1. - s->overlap) * s->win_size;
- if (s->skip_samples < 1) {
+ s->hop_size = (1. - s->overlap) * s->win_size;
+ if (s->hop_size < 1) {
av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
return AVERROR(EINVAL);
}
memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
}
+ av_frame_set_color_range(outpicref, AVCOL_RANGE_JPEG);
}
- if ((s->orientation == VERTICAL && s->xpos >= outlink->w) ||
- (s->orientation == HORIZONTAL && s->xpos >= outlink->h))
+ 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));
if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
- outlink->frame_rate.den *= outlink->w;
+ outlink->frame_rate.den *= s->w;
if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
- outlink->frame_rate.den *= outlink->h;
+ outlink->frame_rate.den *= s->h;
if (s->orientation == VERTICAL) {
s->combine_buffer =
- av_realloc_f(s->combine_buffer, outlink->h * 3,
+ av_realloc_f(s->combine_buffer, s->h * 3,
sizeof(*s->combine_buffer));
} else {
s->combine_buffer =
- av_realloc_f(s->combine_buffer, outlink->w * 3,
+ av_realloc_f(s->combine_buffer, s->w * 3,
sizeof(*s->combine_buffer));
}
#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))
+#define PHASE(y, ch) atan2(IM(y, ch), RE(y, ch))
static void calc_magnitudes(ShowSpectrumContext *s)
{
+ const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
+ const float f = s->gain * w;
for (ch = 0; ch < s->nb_display_channels; ch++) {
float *magnitudes = s->magnitudes[ch];
for (y = 0; y < h; y++)
- magnitudes[y] = MAGNITUDE(y, ch);
+ magnitudes[y] = MAGNITUDE(y, ch) * f;
+ }
+}
+
+static void calc_phases(ShowSpectrumContext *s)
+{
+ int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
+
+ for (ch = 0; ch < s->nb_display_channels; ch++) {
+ float *phases = s->phases[ch];
+
+ for (y = 0; y < h; y++)
+ phases[y] = (PHASE(y, ch) / M_PI + 1) / 2;
}
}
static void acalc_magnitudes(ShowSpectrumContext *s)
{
+ const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
+ const float f = s->gain * w;
for (ch = 0; ch < s->nb_display_channels; ch++) {
float *magnitudes = s->magnitudes[ch];
for (y = 0; y < h; y++)
- magnitudes[y] += MAGNITUDE(y, ch);
+ magnitudes[y] += MAGNITUDE(y, ch) * f;
}
}
}
}
+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);
+ *vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels);
+ } else {
+ *uf = 0.0f;
+ *vf = 0.0f;
+ }
+ }
+ *uf *= s->saturation;
+ *vf *= s->saturation;
+}
+
static void pick_color(ShowSpectrumContext *s,
float yf, float uf, float vf,
float a, float *out)
AVFilterLink *outlink = ctx->outputs[0];
ShowSpectrumContext *s = ctx->priv;
AVFrame *outpicref = s->outpicref;
- const double w = s->win_scale;
int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
int ch, plane, x, y;
/* fill a new spectrum column */
/* initialize buffer for combining to black */
- clear_combine_buffer(s, s->orientation == VERTICAL ? outlink->h : outlink->w);
+ clear_combine_buffer(s, s->orientation == VERTICAL ? s->h : s->w);
for (ch = 0; ch < s->nb_display_channels; ch++) {
float *magnitudes = s->magnitudes[ch];
+ float *phases = s->phases[ch];
float yf, uf, vf;
/* decide color range */
- 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 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);
- vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels);
- } else {
- uf = 0.0f;
- vf = 0.0f;
- }
- }
- uf *= s->saturation;
- vf *= s->saturation;
+ color_range(s, ch, &yf, &uf, &vf);
/* draw the channel */
for (y = 0; y < h; y++) {
int row = (s->mode == COMBINED) ? y : ch * h + y;
float *out = &s->combine_buffer[3 * row];
+ float a;
- /* get magnitude */
- float a = w * magnitudes[y];
+ switch (s->data) {
+ case D_MAGNITUDE:
+ /* get magnitude */
+ a = magnitudes[y];
+ break;
+ case D_PHASE:
+ /* get phase */
+ a = phases[y];
+ break;
+ default:
+ av_assert0(0);
+ }
/* apply scale */
switch (s->scale) {
case LINEAR:
+ a = av_clipf(a, 0, 1);
break;
case SQRT:
- a = sqrt(a);
+ a = av_clipf(sqrt(a), 0, 1);
break;
case CBRT:
- a = cbrt(a);
+ a = av_clipf(cbrt(a), 0, 1);
break;
case FOURTHRT:
- a = pow(a, 0.25);
+ a = av_clipf(sqrt(sqrt(a)), 0, 1);
break;
case FIFTHRT:
- a = pow(a, 0.20);
+ a = av_clipf(pow(a, 0.20), 0, 1);
break;
case LOG:
- a = 1 + log10(FFMAX(FFMIN(1, a * w), 1e-6)) / 6; // zero = -120dBFS
+ a = 1 + log10(av_clipd(a, 1e-6, 1)) / 6; // zero = -120dBFS
break;
default:
av_assert0(0);
if (s->orientation == VERTICAL) {
if (s->sliding == SCROLL) {
for (plane = 0; plane < 3; plane++) {
- for (y = 0; y < outlink->h; y++) {
+ for (y = 0; y < s->h; y++) {
uint8_t *p = outpicref->data[plane] +
y * outpicref->linesize[plane];
- memmove(p, p + 1, outlink->w - 1);
+ memmove(p, p + 1, s->w - 1);
}
}
- s->xpos = outlink->w - 1;
+ s->xpos = s->w - 1;
} else if (s->sliding == RSCROLL) {
for (plane = 0; plane < 3; plane++) {
- for (y = 0; y < outlink->h; y++) {
+ for (y = 0; y < s->h; y++) {
uint8_t *p = outpicref->data[plane] +
y * outpicref->linesize[plane];
- memmove(p + 1, p, outlink->w - 1);
+ memmove(p + 1, p, s->w - 1);
}
}
s->xpos = 0;
}
for (plane = 0; plane < 3; plane++) {
- uint8_t *p = outpicref->data[plane] +
- (outlink->h - 1) * outpicref->linesize[plane] +
+ uint8_t *p = outpicref->data[plane] + s->start_x +
+ (outlink->h - 1 - s->start_y) * outpicref->linesize[plane] +
s->xpos;
- for (y = 0; y < outlink->h; y++) {
- *p = lrint(FFMAX(0, FFMIN(s->combine_buffer[3 * y + plane], 255)));
+ for (y = 0; y < s->h; y++) {
+ *p = lrintf(av_clipf(s->combine_buffer[3 * y + plane], 0, 255));
p -= outpicref->linesize[plane];
}
}
} else {
if (s->sliding == SCROLL) {
for (plane = 0; plane < 3; plane++) {
- for (y = 1; y < outlink->h; y++) {
+ for (y = 1; y < s->h; y++) {
memmove(outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
outpicref->data[plane] + (y ) * outpicref->linesize[plane],
- outlink->w);
+ s->w);
}
}
- s->xpos = outlink->h - 1;
+ s->xpos = s->h - 1;
} else if (s->sliding == RSCROLL) {
for (plane = 0; plane < 3; plane++) {
- for (y = outlink->h - 1; y >= 1; y--) {
+ for (y = s->h - 1; y >= 1; y--) {
memmove(outpicref->data[plane] + (y ) * outpicref->linesize[plane],
outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
- outlink->w);
+ s->w);
}
}
s->xpos = 0;
}
for (plane = 0; plane < 3; plane++) {
- uint8_t *p = outpicref->data[plane] +
- s->xpos * outpicref->linesize[plane];
- for (x = 0; x < outlink->w; x++) {
- *p = lrint(FFMAX(0, FFMIN(s->combine_buffer[3 * x + plane], 255)));
+ uint8_t *p = outpicref->data[plane] + s->start_x +
+ (s->xpos + s->start_y) * outpicref->linesize[plane];
+ for (x = 0; x < s->w; x++) {
+ *p = lrintf(av_clipf(s->combine_buffer[3 * x + plane], 0, 255));
p++;
}
}
outpicref->pts = insamples->pts;
s->xpos++;
- if (s->orientation == VERTICAL && s->xpos >= outlink->w)
+ if (s->orientation == VERTICAL && s->xpos >= s->w)
s->xpos = 0;
- if (s->orientation == HORIZONTAL && s->xpos >= outlink->h)
+ 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));
}
fin->pts = s->pts;
- s->pts += s->skip_samples;
+ s->pts += s->hop_size;
ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
if (ret < 0)
goto fail;
av_assert0(fin->nb_samples == s->win_size);
run_fft(s, fin);
- calc_magnitudes(s);
+ if (s->data == D_MAGNITUDE)
+ calc_magnitudes(s);
+ if (s->data == D_PHASE)
+ calc_phases(s);
ret = plot_spectrum_column(inlink, fin);
av_frame_free(&fin);
- av_audio_fifo_drain(s->fifo, s->skip_samples);
+ av_audio_fifo_drain(s->fifo, s->hop_size);
if (ret < 0)
goto fail;
}
{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" },
{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" },
{ "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" },
{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, "scale" },
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
{ "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" },
{ "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" },
{ "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" },
+ { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" },
{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" },
{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" },
{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" },
+ { "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 },
{ 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)
{
ShowSpectrumContext *s = outlink->src->priv;
if (ret == AVERROR_EOF && s->outpicref) {
int samples = av_audio_fifo_size(s->fifo);
int consumed = 0;
- int x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
+ int y, 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;
+ uint8_t *dst;
+
+ drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
+
+ 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;
+ 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 - 1) * 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 - 1) * 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 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;
}
projects / ffmpeg / blobdiff