liboverlay: Add support for MDSS Bandwidth Compression
- This adds support for Bandwidth Compression.
- If MDSS supports BWC, then we set BWC flags
to both Rotator(encode) and overlay(decode)
Change-Id: I6f7800716a2ce2ab855f4c0b1a53cd96f7d06d74
diff --git a/liboverlay/overlayMdssRot.cpp b/liboverlay/overlayMdssRot.cpp
index 1fabdca..6f2b564 100644
--- a/liboverlay/overlayMdssRot.cpp
+++ b/liboverlay/overlayMdssRot.cpp
@@ -20,6 +20,8 @@
#include "overlayUtils.h"
#include "overlayRotator.h"
+#define DEBUG_MDSS_ROT 0
+
#ifdef VENUS_COLOR_FORMAT
#include <media/msm_media_info.h>
#else
@@ -252,7 +254,11 @@
ovutils::Whf destWhf(mRotInfo.dst_rect.w, mRotInfo.dst_rect.h,
mRotInfo.src.format); //mdss src and dst formats are same.
- opBufSize = Rotator::calcOutputBufSize(destWhf);
+ if (mRotInfo.flags & ovutils::OV_MDSS_MDP_BWC_EN) {
+ opBufSize = calcCompressedBufSize();
+ } else {
+ opBufSize = Rotator::calcOutputBufSize(destWhf);
+ }
if (mRotInfo.flags & utils::OV_MDP_SECURE_OVERLAY_SESSION)
opBufSize = utils::align(opBufSize, SIZE_1M);
@@ -265,4 +271,23 @@
ovutils::getDump(buf, len, "MdssRotData", mRotData);
}
+// Calculate the compressed o/p buffer size for BWC
+uint32_t MdssRot::calcCompressedBufSize() {
+ uint32_t bufSize = 0;
+ int aWidth = ovutils::align(mRotInfo.src_rect.w, 64);
+ int aHeight = ovutils::align(mRotInfo.src_rect.h, 4);
+ int rau_cnt = aWidth/64;
+ int stride0 = (64 * 4 * rau_cnt) + rau_cnt/8;
+ int stride1 = (64 * 2 * rau_cnt) + rau_cnt/8;
+ int stride0_off = (aHeight/4);
+ int stride1_off = (aHeight/2);
+
+ //New o/p size for BWC
+ bufSize = (stride0 * stride0_off + stride1 * stride1_off) +
+ (rau_cnt * 2 * (stride0_off + stride1_off));
+ ALOGD_IF(DEBUG_MDSS_ROT, "%s: width = %d, height = %d raucount = %d"
+ "opBufSize = %d ", __FUNCTION__, aWidth, aHeight, rau_cnt, bufSize);
+ return bufSize;
+}
+
} // namespace overlay