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avfilter/avf_showspectrum: add horizontal orientation support

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-12-29 09:45:44 +01:00
parent 9f4c7b4df7
commit e30e5c83ae
2 changed files with 114 additions and 40 deletions
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4
doc/filters.texi
View File

@ -14665,6 +14665,10 @@ It accepts the following values:
@end table
Default value is @code{hann}.
@item orientation
Set orientation of time vs frequency axis. Can be @code{vertical} or
@code{horizontal}. Default is @code{vertical}.
@end table
The usage is very similar to the showwaves filter; see the examples in that

84
libavfilter/avf_showspectrum.c
View File

@ -39,12 +39,15 @@ enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
enum DisplayScale { LINEAR, SQRT, CBRT, LOG, NB_SCALES };
enum ColorMode { CHANNEL, INTENSITY, NB_CLMODES };
enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
typedef struct {
const AVClass *class;
int w, h;
AVFrame *outpicref;
int nb_display_channels;
int orientation;
int channel_width;
int channel_height;
int sliding; ///< 1 if sliding mode, 0 otherwise
int mode; ///< channel display mode
@ -100,6 +103,9 @@ static const AVOption showspectrum_options[] = {
{ "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" },
{ "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" },
{ NULL }
};
@ -168,16 +174,23 @@ static int config_output(AVFilterLink *outlink)
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowSpectrumContext *s = ctx->priv;
int i, rdft_bits, win_size, h;
int i, rdft_bits, win_size, h, w;
outlink->w = s->w;
outlink->h = s->h;
h = (s->mode == COMBINED) ? outlink->h : outlink->h / inlink->channels;
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;
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++);
} else {
/* RDFT window size (precision) according to the requested output frame width */
for (rdft_bits = 1; 1 << rdft_bits < 2 * w; rdft_bits++);
}
win_size = 1 << rdft_bits;
/* (re-)configuration if the video output changed (or first init) */
@ -232,19 +245,28 @@ static int config_output(AVFilterLink *outlink)
}
}
if (s->xpos >= outlink->w)
if ((s->orientation == VERTICAL && s->xpos >= outlink->w) ||
(s->orientation == HORIZONTAL && s->xpos >= outlink->h))
s->xpos = 0;
outlink->frame_rate = av_make_q(inlink->sample_rate, win_size);
if (s->sliding == FULLFRAME)
if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
outlink->frame_rate.den *= outlink->w;
if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
outlink->frame_rate.den *= outlink->h;
inlink->min_samples = inlink->max_samples = inlink->partial_buf_size =
win_size;
if (s->orientation == VERTICAL) {
s->combine_buffer =
av_realloc_f(s->combine_buffer, outlink->h * 3,
sizeof(*s->combine_buffer));
} else {
s->combine_buffer =
av_realloc_f(s->combine_buffer, outlink->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);
@ -261,11 +283,19 @@ static int request_frame(AVFilterLink *outlink)
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;
}
@ -286,9 +316,9 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
const int nb_freq = 1 << (s->rdft_bits - 1);
const int win_size = nb_freq << 1;
const double w = 1. / (sqrt(nb_freq) * 32768.);
int h = s->channel_height;
int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
int ch, plane, n, y;
int ch, plane, n, x, y;
av_assert0(insamples->nb_samples == win_size);
@ -310,11 +340,19 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
#define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, 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 (ch = 0; ch < s->nb_display_channels; ch++) {
float yf, uf, vf;
@ -427,6 +465,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
}
/* copy to output */
if (s->orientation == VERTICAL) {
if (s->sliding == SCROLL) {
for (plane = 0; plane < 3; plane++) {
for (y = 0; y < outlink->h; y++) {
@ -455,12 +494,43 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
p -= outpicref->linesize[plane];
}
}
} else {
if (s->sliding == SCROLL) {
for (plane = 0; plane < 3; plane++) {
for (y = 1; y < outlink->h; y++) {
memmove(outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
outpicref->data[plane] + (y ) * outpicref->linesize[plane],
outlink->w);
}
}
s->xpos = outlink->h - 1;
} else if (s->sliding == RSCROLL) {
for (plane = 0; plane < 3; plane++) {
for (y = outlink->h - 1; y >= 1; y--) {
memmove(outpicref->data[plane] + (y ) * outpicref->linesize[plane],
outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
outlink->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)));
p++;
}
}
}
if (s->sliding != FULLFRAME || s->xpos == 0)
outpicref->pts = insamples->pts;
s->xpos++;
if (s->xpos >= outlink->w)
if (s->orientation == VERTICAL && s->xpos >= outlink->w)
s->xpos = 0;
if (s->orientation == HORIZONTAL && s->xpos >= outlink->h)
s->xpos = 0;
if (s->sliding != FULLFRAME || s->xpos == 0) {
ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));