#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 DisplayScale { LINEAR, SQRT, CBRT, LOG, NB_SCALES };
-enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, NB_CLMODES };
+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 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)
- RDFTContext *rdft; ///< Real Discrete Fourier Transform context
- int rdft_bits; ///< number of bits (RDFT window size = 1<<rdft_bits)
- FFTSample **rdft_data; ///< bins holder for each (displayed) channels
+ 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)
{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" },
{ "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" },
+ { "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" },
+ { "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" },
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
{ "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, 126/256., (74-128)/256., (172-128)/256. },
{ 0.87, 164/256., (73-128)/256., (162-128)/256. },
{ 1, 1, 0, 0 }},
+ [FIERY] = {
+ { 0, 0, 0, 0 },
+ { 0.23, 36/256., (116-128)/256., (163-128)/256. },
+ { 0.45, 52/256., (102-128)/256., (200-128)/256. },
+ { 0.57, 116/256., (84-128)/256., (196-128)/256. },
+ { 0.67, 157/256., (67-128)/256., (181-128)/256. },
+ { 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)
int i;
av_freep(&s->combine_buffer);
- av_rdft_end(s->rdft);
- for (i = 0; i < s->nb_display_channels; i++)
- av_freep(&s->rdft_data[i]);
- av_freep(&s->rdft_data);
+ av_fft_end(s->fft);
+ if (s->fft_data) {
+ for (i = 0; i < s->nb_display_channels; i++)
+ av_freep(&s->fft_data[i]);
+ }
+ av_freep(&s->fft_data);
av_freep(&s->window_func_lut);
+ if (s->magnitudes) {
+ for (i = 0; i < s->nb_display_channels; i++)
+ av_freep(&s->magnitudes[i]);
+ }
+ 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)
AVFilterChannelLayouts *layouts = NULL;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
- static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_NONE };
- static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE };
+ static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_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 */
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowSpectrumContext *s = ctx->priv;
- int i, rdft_bits, win_size, h, w;
+ int i, fft_bits, h, w;
float overlap;
+ if (!strcmp(ctx->filter->name, "showspectrumpic"))
+ s->single_pic = 1;
+
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;
if (s->orientation == VERTICAL) {
- /* RDFT window size (precision) according to the requested output frame height */
- for (rdft_bits = 1; 1 << rdft_bits < 2 * h; rdft_bits++);
+ /* FFT window size (precision) according to the requested output frame height */
+ for (fft_bits = 1; 1 << fft_bits < 2 * h; fft_bits++);
} else {
- /* RDFT window size (precision) according to the requested output frame width */
- for (rdft_bits = 1; 1 << rdft_bits < 2 * w; rdft_bits++);
+ /* FFT window size (precision) according to the requested output frame width */
+ for (fft_bits = 1; 1 << fft_bits < 2 * w; fft_bits++);
}
- win_size = 1 << rdft_bits;
+ s->win_size = 1 << fft_bits;
/* (re-)configuration if the video output changed (or first init) */
- if (rdft_bits != s->rdft_bits) {
+ if (fft_bits != s->fft_bits) {
AVFrame *outpicref;
- av_rdft_end(s->rdft);
- s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
- if (!s->rdft) {
- av_log(ctx, AV_LOG_ERROR, "Unable to create RDFT context. "
+ av_fft_end(s->fft);
+ s->fft = av_fft_init(fft_bits, 0);
+ if (!s->fft) {
+ av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
"The window size might be too high.\n");
return AVERROR(EINVAL);
}
- s->rdft_bits = rdft_bits;
+ s->fft_bits = fft_bits;
- /* RDFT buffers: x2 for each (display) channel buffer.
+ /* FFT buffers: x2 for each (display) channel buffer.
* 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++)
- av_freep(&s->rdft_data[i]);
- av_freep(&s->rdft_data);
+ av_freep(&s->fft_data[i]);
+ av_freep(&s->fft_data);
s->nb_display_channels = inlink->channels;
- s->rdft_data = av_calloc(s->nb_display_channels, sizeof(*s->rdft_data));
- if (!s->rdft_data)
+ s->magnitudes = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes));
+ if (!s->magnitudes)
+ return AVERROR(ENOMEM);
+ for (i = 0; i < s->nb_display_channels; i++) {
+ s->magnitudes[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->magnitudes));
+ if (!s->magnitudes[i])
+ 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);
for (i = 0; i < s->nb_display_channels; i++) {
- s->rdft_data[i] = av_calloc(win_size, sizeof(**s->rdft_data));
- if (!s->rdft_data[i])
+ s->fft_data[i] = av_calloc(s->win_size, sizeof(**s->fft_data));
+ if (!s->fft_data[i])
return AVERROR(ENOMEM);
}
/* pre-calc windowing function */
s->window_func_lut =
- av_realloc_f(s->window_func_lut, win_size,
+ av_realloc_f(s->window_func_lut, s->win_size,
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
- ff_generate_window_func(s->window_func_lut, win_size, s->win_func, &overlap);
+ 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) * 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);
}
- for (s->win_scale = 0, i = 0; i < win_size; i++) {
+ for (s->win_scale = 0, i = 0; i < s->win_size; i++) {
s->win_scale += s->window_func_lut[i] * s->window_func_lut[i];
}
- s->win_scale = 1. / (sqrt(s->win_scale) * 32768.);
+ s->win_scale = 1. / sqrt(s->win_scale);
/* prepare the initial picref buffer (black frame) */
av_frame_free(&s->outpicref);
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, win_size * (1.-s->overlap));
+ 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));
}
- av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d RDFT window size:%d\n",
- s->w, s->h, win_size);
+ av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d FFT window size:%d\n",
+ s->w, s->h, s->win_size);
av_audio_fifo_free(s->fifo);
- s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, win_size);
+ s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->win_size);
if (!s->fifo)
return AVERROR(ENOMEM);
return 0;
}
-static int request_frame(AVFilterLink *outlink)
+static void run_fft(ShowSpectrumContext *s, AVFrame *fin)
{
- ShowSpectrumContext *s = outlink->src->priv;
- AVFilterLink *inlink = outlink->src->inputs[0];
- unsigned i;
- int ret;
+ int ch, n;
- 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);
- }
+ /* fill FFT input with the number of samples available */
+ for (ch = 0; ch < s->nb_display_channels; ch++) {
+ const float *p = (float *)fin->extended_data[ch];
+
+ for (n = 0; n < s->win_size; n++) {
+ s->fft_data[ch][n].re = p[n] * s->window_func_lut[n];
+ s->fft_data[ch][n].im = 0;
}
- ret = ff_filter_frame(outlink, s->outpicref);
- s->outpicref = NULL;
}
- return ret;
+ /* run FFT on each samples set */
+ for (ch = 0; ch < s->nb_display_channels; ch++) {
+ av_fft_permute(s->fft, s->fft_data[ch]);
+ av_fft_calc(s->fft, s->fft_data[ch]);
+ }
}
-static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
+#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)
{
- int ret;
- AVFilterContext *ctx = inlink->dst;
- AVFilterLink *outlink = ctx->outputs[0];
- ShowSpectrumContext *s = ctx->priv;
- AVFrame *outpicref = s->outpicref;
+ 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;
- /* nb_freq contains the power of two superior or equal to the output image
- * height (or half the RDFT window size) */
- const int nb_freq = 1 << (s->rdft_bits - 1);
- const int win_size = nb_freq << 1;
- const double w = s->win_scale;
- int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
+ for (ch = 0; ch < s->nb_display_channels; ch++) {
+ float *magnitudes = s->magnitudes[ch];
- int ch, plane, n, x, y;
+ for (y = 0; y < h; y++)
+ magnitudes[y] = MAGNITUDE(y, ch) * f;
+ }
+}
- av_assert0(insamples->nb_samples == win_size);
+static void calc_phases(ShowSpectrumContext *s)
+{
+ int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
- /* fill RDFT input with the number of samples available */
for (ch = 0; ch < s->nb_display_channels; ch++) {
- const int16_t *p = (int16_t *)insamples->extended_data[ch];
+ float *phases = s->phases[ch];
- for (n = 0; n < win_size; n++)
- s->rdft_data[ch][n] = p[n] * s->window_func_lut[n];
+ for (y = 0; y < h; y++)
+ phases[y] = (PHASE(y, ch) / M_PI + 1) / 2;
}
+}
- /* run RDFT on each samples set */
- for (ch = 0; ch < s->nb_display_channels; ch++)
- av_rdft_calc(s->rdft, s->rdft_data[ch]);
+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;
- /* fill a new spectrum column */
-#define RE(y, ch) s->rdft_data[ch][2 * (y) + 0]
-#define IM(y, ch) s->rdft_data[ch][2 * (y) + 1]
-#define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, ch))
+ for (ch = 0; ch < s->nb_display_channels; ch++) {
+ float *magnitudes = s->magnitudes[ch];
- /* initialize buffer for combining to black */
- if (s->orientation == VERTICAL) {
- for (y = 0; y < outlink->h; y++) {
- s->combine_buffer[3 * y ] = 0;
- s->combine_buffer[3 * y + 1] = 127.5;
- s->combine_buffer[3 * y + 2] = 127.5;
- }
- } else {
- for (y = 0; y < outlink->w; y++) {
- s->combine_buffer[3 * y ] = 0;
- s->combine_buffer[3 * y + 1] = 127.5;
- s->combine_buffer[3 * y + 2] = 127.5;
- }
+ for (y = 0; y < h; y++)
+ magnitudes[y] += MAGNITUDE(y, ch) * f;
}
+}
+
+static void scale_magnitudes(ShowSpectrumContext *s, float scale)
+{
+ int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
for (ch = 0; ch < s->nb_display_channels; ch++) {
- float yf, uf, vf;
+ float *magnitudes = s->magnitudes[ch];
- /* 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 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);
- }
+ for (y = 0; y < h; y++)
+ magnitudes[y] *= 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 INTENSITY:
+ *uf = *yf;
+ *vf = *yf;
break;
- case SEPARATE:
- // full range
- yf = 256.0f;
- uf = 256.0f;
- vf = 256.0f;
+ 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;
- }
+ 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;
+ }
+ *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;
+
+ for (y = 0; y < size; y++) {
+ s->combine_buffer[3 * y ] = 0;
+ s->combine_buffer[3 * y + 1] = 127.5;
+ s->combine_buffer[3 * y + 2] = 127.5;
+ }
+}
+
+static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
+{
+ int ret;
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ ShowSpectrumContext *s = ctx->priv;
+ AVFrame *outpicref = s->outpicref;
+ 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 ? 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 */
+ 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 * MAGNITUDE(y, ch);
+ 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 = av_clipf(sqrt(sqrt(a)), 0, 1);
+ break;
+ case FIFTHRT:
+ a = av_clipf(pow(a, 0.20), 0, 1);
break;
case LOG:
- a = 1 + log10(FFMAX(FFMIN(1, a), 1e-6)) / 5; // zero = -120dBFS
+ a = 1 + log10(av_clipd(a, 1e-6, 1)) / 6; // zero = -120dBFS
break;
default:
av_assert0(0);
}
- 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;
- }
+ pick_color(s, yf, uf, vf, a, out);
}
}
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->sliding != FULLFRAME || 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;
}
- return win_size;
+ return s->win_size;
+}
+
+#if CONFIG_SHOWSPECTRUM_FILTER
+
+static int request_frame(AVFilterLink *outlink)
+{
+ ShowSpectrumContext *s = outlink->src->priv;
+ AVFilterLink *inlink = outlink->src->inputs[0];
+ unsigned i;
+ 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;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
{
AVFilterContext *ctx = inlink->dst;
ShowSpectrumContext *s = ctx->priv;
- unsigned win_size = 1 << s->rdft_bits;
AVFrame *fin = NULL;
int ret = 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) >= win_size) {
- fin = ff_get_audio_buffer(inlink, win_size);
+ 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;
}
fin->pts = s->pts;
- s->pts += s->skip_samples;
- ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, win_size);
+ 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);
+ 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;
}
.outputs = showspectrum_outputs,
.priv_class = &showspectrum_class,
};
+#endif // CONFIG_SHOWSPECTRUM_FILTER
+
+#if CONFIG_SHOWSPECTRUMPIC_FILTER
+
+static const AVOption showspectrumpic_options[] = {
+ { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
+ { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
+ { "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_MODES-1, FLAGS, "mode" },
+ { "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "mode" },
+ { "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "mode" },
+ { "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=INTENSITY}, 0, NB_CLMODES-1, FLAGS, "color" },
+ { "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" },
+ { "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" },
+ { "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" },
+ { "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" },
+ { "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" },
+ { "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" },
+ { "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" },
+ { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
+ { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
+ { "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
+ { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
+ { "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" },
+ { "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },
+ { "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
+ { "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
+ { "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" },
+ { "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
+ { "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" },
+ { "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" },
+ { "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" },
+ { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" },
+ { "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" },
+ { "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" },
+ { "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;
+ AVFilterLink *inlink = outlink->src->inputs[0];
+ int ret;
+
+ ret = ff_request_frame(inlink);
+ if (ret == AVERROR_EOF && s->outpicref) {
+ int samples = av_audio_fifo_size(s->fifo);
+ int consumed = 0;
+ int y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
+ int ch, spf, spb;
+ AVFrame *fin;
+
+ spf = s->win_size * (samples / ((s->win_size * sz) * ceil(samples / (float)(s->win_size * sz))));
+ spb = (samples / (spf * sz)) * spf;
+
+ fin = ff_get_audio_buffer(inlink, s->win_size);
+ if (!fin)
+ return AVERROR(ENOMEM);
+
+ while (x < sz) {
+ ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
+ if (ret < 0) {
+ av_frame_free(&fin);
+ return ret;
+ }
+
+ av_audio_fifo_drain(s->fifo, spf);
+
+ if (ret < s->win_size) {
+ for (ch = 0; ch < s->nb_display_channels; ch++) {
+ memset(fin->extended_data[ch] + ret * sizeof(float), 0,
+ (s->win_size - ret) * sizeof(float));
+ }
+ }
+
+ run_fft(s, fin);
+ acalc_magnitudes(s);
+
+ consumed += spf;
+ if (consumed >= spb) {
+ int h = s->orientation == VERTICAL ? s->h : s->w;
+
+ scale_magnitudes(s, 1. / (consumed / spf));
+ plot_spectrum_column(inlink, fin);
+ consumed = 0;
+ x++;
+ for (ch = 0; ch < s->nb_display_channels; ch++)
+ memset(s->magnitudes[ch], 0, h * sizeof(float));
+ }
+ }
+
+ 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;
+ }
+
+ return ret;
+}
+
+static int showspectrumpic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ShowSpectrumContext *s = ctx->priv;
+ int ret;
+
+ ret = av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples);
+ av_frame_free(&insamples);
+ return ret;
+}
+
+static const AVFilterPad showspectrumpic_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .filter_frame = showspectrumpic_filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad showspectrumpic_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ .request_frame = showspectrumpic_request_frame,
+ },
+ { NULL }
+};
+
+AVFilter ff_avf_showspectrumpic = {
+ .name = "showspectrumpic",
+ .description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output single picture."),
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .priv_size = sizeof(ShowSpectrumContext),
+ .inputs = showspectrumpic_inputs,
+ .outputs = showspectrumpic_outputs,
+ .priv_class = &showspectrumpic_class,
+};
+
+#endif // CONFIG_SHOWSPECTRUMPIC_FILTER
projects / ffmpeg / blobdiff