int w, h;
AVFilterBufferRef *outpicref;
int req_fullfilled;
+ int sliding; ///< 1 if sliding mode, 0 otherwise
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)
static const AVOption showspectrum_options[] = {
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, FLAGS },
+ { "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
{ NULL },
};
for (y = 0; y < outlink->h; y++) {
// FIXME: bin[0] contains first and last bins
- const int pos = showspectrum->xpos * 3 + (outlink->h - y - 1) * outpicref->linesize[0];
+ uint8_t *p = outpicref->data[0] + (outlink->h - y - 1) * outpicref->linesize[0];
const double w = 1. / sqrt(nb_freq);
int a = sqrt(w * MAGNITUDE(RE(0), IM(0)));
int b = nb_display_channels > 1 ? sqrt(w * MAGNITUDE(RE(1), IM(1))) : a;
+ if (showspectrum->sliding) {
+ memmove(p, p + 3, (outlink->w - 1) * 3);
+ p += (outlink->w - 1) * 3;
+ } else {
+ p += showspectrum->xpos * 3;
+ }
+
a = FFMIN(a, 255);
b = FFMIN(b, 255);
- outpicref->data[0][pos] = a;
- outpicref->data[0][pos+1] = b;
- outpicref->data[0][pos+2] = (a + b) / 2;
+ p[0] = a;
+ p[1] = b;
+ p[2] = (a + b) / 2;
}
outpicref->pts = insamples->pts +
av_rescale_q(showspectrum->consumed,