LEVEL_DECAY       209 libavcodec/wavpack.c         sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level);
LEVEL_DECAY       248 libavcodec/wavpack.c                 c->slow_level -= LEVEL_DECAY(c->slow_level);
LEVEL_DECAY       258 libavcodec/wavpack.c                 c->slow_level -= LEVEL_DECAY(c->slow_level);
LEVEL_DECAY       335 libavcodec/wavpack.c         c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level);