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avfilter/avf_showspectrum: also show sample rate and channel layout 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2018-06-03 12:43:43 +02:00
parent 9add1786ad
commit 49eda27c6e
1 changed files with 10 additions and 0 deletions
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10
libavfilter/avf_showspectrum.c
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@ -1082,9 +1082,19 @@ static int showspectrumpic_request_frame(AVFilterLink *outlink)
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++)