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make sure we never overflow when calculating sleep time

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Issue pointed out by Jaroslav Kysela
This commit is contained in:
Lennart Poettering 2009-04-13 03:40:46 +02:00
parent 6eaeaea581
commit d8de5d374e
2 changed files with 28 additions and 4 deletions
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16
src/modules/alsa/alsa-source.c
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@ -465,7 +465,13 @@ static int mmap_read(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled
}
}
*sleep_usec = pa_bytes_to_usec(left_to_record, &u->source->sample_spec) - process_usec;
*sleep_usec = pa_bytes_to_usec(left_to_record, &u->source->sample_spec);
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*sleep_usec = 0;
return work_done ? 1 : 0;
}
@ -575,7 +581,13 @@ static int unix_read(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled
}
}
*sleep_usec = pa_bytes_to_usec(left_to_record, &u->source->sample_spec) - process_usec;
*sleep_usec = pa_bytes_to_usec(left_to_record, &u->source->sample_spec);
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*sleep_usec = 0;
return work_done ? 1 : 0;
}