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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-sink.c
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@ -483,7 +483,13 @@ static int mmap_write(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polle
}
}
*sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) - process_usec;
*sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec);
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*sleep_usec = 0;
return work_done ? 1 : 0;
}
@ -605,7 +611,13 @@ static int unix_write(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polle
}
}
*sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) - process_usec;
*sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec);
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*sleep_usec = 0;
return work_done ? 1 : 0;
}