audio: preserve feedback scheduler remainder

Keep the fractional packet accumulator when a new explicit-feedback value is latched. Repeated feedback updates no longer bias high-speed fractional rates toward alternating undersized and oversized packets.

Signed-off-by: HiFiPHile <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/class/audio/audio_host.c b/src/class/audio/audio_host.c
index e676a3354..157f15545 100644
--- a/src/class/audio/audio_host.c
+++ b/src/class/audio/audio_host.c
@@ -551,7 +551,8 @@ static void audioh_stream_playback_xfer(tuh_audio_stream_t *s) {
   if (loop_done && playback->feedback_pending) {
     playback->target_frames_q16 = playback->pending_frames_q16;
     playback->feedback_pending  = false;
-    playback->rem_acc           = 0;
+    // Keep the remainder from the completed cycle. Clearing it for every
+    // feedback update biases the average toward the integer packet sizes.
   }
 }