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Add blackout time.

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This commit is contained in:
HiFiPhile 2023-10-17 15:18:05 +02:00
parent 0a1d6cf4d0
commit d83a210788
1 changed files with 23 additions and 9 deletions
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32
src/class/audio/audio_device.c
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@ -2614,25 +2614,39 @@ static uint16_t audiod_tx_packet_size(const uint16_t* norminal_size, uint16_t da
// Flow control need a FIFO size of at least 4*Navg
if(norminal_size[1] && norminal_size[1] <= fifo_depth * 4)
{
// Use blackout to prioritize normal size packet
static int ctrl_blackout = 0;
uint16_t packet_size;
uint16_t slot_size = norminal_size[2] - norminal_size[1];
if (data_count < fifo_depth / 2 - slot_size)
if (data_count < norminal_size[0])
{
if (data_count < norminal_size[0])
{
// If you get here frequently, then your I2S clock deviation is too big !
packet_size = 0;
} else
{
packet_size = norminal_size[0];
}
}
else if (data_count > fifo_depth / 2 + slot_size)
} else
if (data_count < fifo_depth / 2 - slot_size && !ctrl_blackout)
{
packet_size = norminal_size[0];
ctrl_blackout = 10;
} else
if (data_count > fifo_depth / 2 + slot_size && !ctrl_blackout)
{
packet_size = norminal_size[2];
if(norminal_size[0] == norminal_size[1])
{
// nav = INT(nav) + 1
ctrl_blackout = 2;
} else
{
// nav = INT(nav)
ctrl_blackout = 10;
}
} else
{
packet_size = norminal_size[1];
if (ctrl_blackout)
{
ctrl_blackout--;
}
}
// Normally this cap is not necessary
return tu_min16(packet_size, max_depth);