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alternative peak meter for aplay

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From: Dirk Jagdmann <doj@cubic.org>

This patch adds an alternative peak meter for aplay/arecord which is
enabled via three "-v" command line arguments. This new mode differs
from the old in a larger meter, no linefeeds for every meter update and
a static maximum peak (for 1s).
This commit is contained in:
Takashi Iwai 2005-12-06 11:23:00 +00:00
parent 0195ba441a
commit 504131b582
2 changed files with 42 additions and 8 deletions
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2
aplay/aplay.1
View file

@ -111,7 +111,7 @@ Delay for automatic PCM stop is # microseconds from xrun
\fI\-v, \-\-verbose\fP
Show PCM structure and setup.
This option is accumulative. The VU meter is displayed when this
is given twice.
is given twice or three times.
.TP
\fI\-I, \-\-separate\-channels\fP
One file for each channel

48
aplay/aplay.c
View file

@ -303,6 +303,8 @@ static void version(void)
static void signal_handler(int sig)
{
if (verbose==2)
putchar('\n');
if (!quiet_mode)
fprintf(stderr, _("Aborted by signal %s...\n"), strsignal(sig));
if (stream == SND_PCM_STREAM_CAPTURE) {
@ -603,6 +605,8 @@ int main(int argc, char *argv[])
else
capturev(&argv[optind], argc - optind);
}
if (verbose==2)
putchar('\n');
snd_pcm_close(handle);
free(audiobuf);
snd_output_close(log);
@ -1183,17 +1187,47 @@ static void compute_max_peak(u_char *data, size_t count)
max = 1 << (bits_per_sample-1);
if (max <= 0)
max = 0x7fffffff;
printf(_("Max peak (%li samples): 0x%08x "), (long)ocount, max_peak);
if (bits_per_sample > 16)
perc = max_peak / (max / 100);
else
perc = max_peak * 100 / max;
for (val = 0; val < 20; val++)
if (val <= perc / 5)
putc('#', stdout);
else
putc(' ', stdout);
printf(" %i%%\n", perc);
if(verbose<=2) {
static int maxperc=0;
static time_t t=0;
const time_t tt=time(NULL);
if(tt>t) {
t=tt;
maxperc=0;
}
if(perc>maxperc)
maxperc=perc;
putchar('\r');
for (val = 0; val <= perc / 2 && val < 50; val++)
putchar('#');
for (; val < maxperc / 2 && val < 50; val++)
putchar(' ');
putchar('+');
for (++val; val < 50; val++)
putchar(' ');
printf("| %02i%%", maxperc);
if (perc>99)
printf(_(" !clip "));
fflush(stdout);
}
else if(verbose==3) {
printf(_("Max peak (%li samples): 0x%08x "), (long)ocount, max_peak);
for (val = 0; val < 20; val++)
if (val <= perc / 5)
putchar('#');
else
putchar(' ');
printf(" %i%%\n", perc);
}
}
/*