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[player] Rename ticks to overrun and safeguard against decreasing from 0

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This commit is contained in:
ejurgensen 2016-02-11 20:02:17 +01:00
parent 5f5a138c77
commit 62eb1a067d
1 changed files with 10 additions and 10 deletions
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20
src/player.c
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@ -76,7 +76,7 @@
// Default volume (must be from 0 - 100)
#define PLAYER_DEFAULT_VOLUME 50
// Used to keep the player from getting ahead of a rate limited source (see below)
#define PLAYER_TICKS_MAX_DELAY 2
#define PLAYER_TICKS_MAX_OVERRUN 2
// Skips ticks for about 2 secs (seems to bring us back in sync for about 20 min)
#define PLAYER_TICKS_SKIP 126
@ -1613,24 +1613,24 @@ static void
player_playback_cb(int fd, short what, void *arg)
{
struct timespec next_tick;
uint64_t ticks;
uint64_t overrun;
uint32_t packet_send_count;
int ret;
// Check if we missed any timer expirations
ticks = 0;
overrun = 0;
#if defined(__linux__)
ret = read(fd, &ticks, sizeof(ticks));
ret = read(fd, &overrun, sizeof(overrun));
if (ret <= 0)
DPRINTF(E_LOG, L_PLAYER, "Error reading timer\n");
else
ticks--;
else if (overrun > 0)
overrun--;
#else
ret = timer_getoverrun(pb_timer);
if (ret < 0)
DPRINTF(E_LOG, L_PLAYER, "Error getting timer overrun\n");
else
ticks = ret;
overrun = ret;
#endif /* __linux__ */
// The reason we get behind the playback timer may be that we are playing a
@ -1642,9 +1642,9 @@ player_playback_cb(int fd, short what, void *arg)
// the source catch up. RTP destinations should be able to handle this
// gracefully if we just give them an rtptime that lets them know that some
// packets were "lost".
if (ticks > PLAYER_TICKS_MAX_DELAY)
if (overrun > PLAYER_TICKS_MAX_OVERRUN)
{
DPRINTF(E_WARN, L_PLAYER, "Behind the playback timer with %" PRIu64 " ticks, initiating catch up\n", ticks);
DPRINTF(E_WARN, L_PLAYER, "Behind the playback timer with %" PRIu64 " ticks, initiating catch up\n", overrun);
ticks_skip = 2 * PLAYER_TICKS_SKIP + 1;
}
else if (ticks_skip > 0)
@ -1652,7 +1652,7 @@ player_playback_cb(int fd, short what, void *arg)
// Decide how many packets to send
next_tick = timespec_add(pb_timer_last, tick_interval);
for (; ticks > 0; ticks--)
for (; overrun > 0; overrun--)
next_tick = timespec_add(next_tick, tick_interval);
packet_send_count = 0;