Commit 62a3f539 authored by Marco's avatar Marco
Browse files

Lower bitrate threshold below which cyclic refresh is turned off.

Change-Id: Ib54ab11adf8178eec74f65388a89c8f912c7869a
parent b6749aa3
......@@ -77,10 +77,10 @@ static int apply_cyclic_refresh_bitrate(const VP9_COMMON *cm,
// with number of seg blocks, so compare available bits to number of blocks.
// Average bits available per frame = avg_frame_bandwidth
// Number of (8x8) blocks in frame = mi_rows * mi_cols;
const float factor = 0.5;
const float factor = 0.25;
const int number_blocks = cm->mi_rows * cm->mi_cols;
// The condition below corresponds to turning off at target bitrates:
// ~24kbps for CIF, 72kbps for VGA (at 30fps).
// (at 30fps), ~12kbps for CIF, 36kbps for VGA, 100kps for HD/720p.
// Also turn off at very small frame sizes, to avoid too large fraction of
// superblocks to be refreshed per frame. Threshold below is less than QCIF.
if (rc->avg_frame_bandwidth < factor * number_blocks ||
......
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