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spark: implement cVideo::getBlank()

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this is a hack: the "mailbox" irq count does not increase if the
decoders are not decoding, so we use this to determine if the
video is in really playing.


Origin commit data
------------------
Branch: master
Commit: 2d52b68c2d
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2012-07-05 (Thu, 05 Jul 2012)



------------------
This commit was generated by Migit
This commit is contained in:
Stefan Seyfried
2012-07-05 20:24:40 +02:00
parent 1048c08e40
commit 4602417532
1 changed files with 28 additions and 2 deletions
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30
libspark/video.cpp
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@@ -490,8 +490,34 @@ void cVideo::Standby(unsigned int bOn)
int cVideo::getBlank(void)
{
lt_debug("%s\n", __FUNCTION__);
return 0;
static unsigned int lastcount = 0;
unsigned int count = 0;
size_t n = 0;
ssize_t r;
char *line = NULL;
char *p;
/* hack: the "mailbox" irq is not increasing if
* no audio or video is decoded... */
FILE *f = fopen("/proc/interrupts", "r");
if (! f) /* huh? */
return 0;
while ((r = getline(&line, &n, f)) != -1)
{
if (r <= strlen("mailbox")) /* should not happen... */
continue;
line[r - 1] = 0; /* remove \n */
if (!strcmp(&line[r - 1 - strlen("mailbox")], "mailbox"))
{
count = atoi(line + 5);
break;
}
}
free(line);
fclose(f);
int ret = (count == lastcount); /* no new decode -> return 1 */
lt_debug("%s: %d (irq++: %d)\n", __func__, ret, count - lastcount);
lastcount = count;
return ret;
}
/* this function is regularly called, checks if video parameters