overlay: pipe reservation mechanism for overlay
This change provides APIs for this mechanism. In a case where
pipeid corresponding to the layer needs to be reserved, then pipe
session could be initiated for that pipe. This will ensure that
the pipe is not garbage collected, and is manually destroyed when
the session (or pipe requirement) has been ended. This change
also provides the api to locally allocate the dest for the given
reserved overlay pipeid.
Change-Id: I3fec3e26f69305c280395b7a92edf9e457398052
diff --git a/liboverlay/overlay.cpp b/liboverlay/overlay.cpp
index 9222af5..6784d4f 100644
--- a/liboverlay/overlay.cpp
+++ b/liboverlay/overlay.cpp
@@ -80,7 +80,8 @@
void Overlay::configDone() {
for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
- if(PipeBook::isNotUsed(i)) {
+ if((PipeBook::isNotUsed(i) && !sessionInProgress((eDest)i)) ||
+ isSessionEnded((eDest)i)) {
//Forces UNSET on pipes, flushes rotator memory and session, closes
//fds
if(mPipeBook[i].valid()) {
@@ -106,6 +107,27 @@
#endif
}
+int Overlay::getPipeId(utils::eDest dest) {
+ return mPipeBook[(int)dest].mPipe->getPipeId();
+}
+
+eDest Overlay::getDest(int pipeid) {
+ eDest dest = OV_INVALID;
+ // finding the dest corresponding to the given pipe
+ for(int i=0; i < PipeBook::NUM_PIPES; ++i) {
+ if(mPipeBook[i].valid() && mPipeBook[i].mPipe->getPipeId() == pipeid) {
+ return (eDest)i;
+ }
+ }
+ return dest;
+}
+
+eDest Overlay::reservePipe(int pipeid) {
+ eDest dest = getDest(pipeid);
+ PipeBook::setAllocation((int)dest);
+ return dest;
+}
+
eDest Overlay::nextPipe(eMdpPipeType type, int dpy, int mixer) {
eDest dest = OV_INVALID;
@@ -131,6 +153,7 @@
mPipeBook[index].mMixer = mixer;
if(not mPipeBook[index].valid()) {
mPipeBook[index].mPipe = new GenericPipe(dpy);
+ mPipeBook[index].mSession = PipeBook::NONE;
char str[32];
snprintf(str, 32, "Set=%s dpy=%d mix=%d; ",
PipeBook::getDestStr(dest), dpy, mixer);
@@ -146,6 +169,13 @@
return dest;
}
+void Overlay::endAllSessions() {
+ for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
+ if(mPipeBook[i].valid() && mPipeBook[i].mSession==PipeBook::START)
+ mPipeBook[i].mSession = PipeBook::END;
+ }
+}
+
bool Overlay::isPipeTypeAttached(eMdpPipeType type) {
for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
if(type == PipeBook::getPipeType((eDest)i) &&
@@ -453,6 +483,7 @@
}
mDisplay = DPY_UNUSED;
mMixer = MIXER_UNUSED;
+ mSession = NONE;
}
Overlay* Overlay::sInstance = 0;