camera3_stream* Camera3Stream::startConfiguration() {
ATRACE_CALL();
Mutex::Autolock l(mLock);
status_t res;
switch (mState) {
case STATE_ERROR:
ALOGE("%s: In error state", __FUNCTION__);
return NULL;
case STATE_CONSTRUCTED:
// OK
break;
case STATE_IN_CONFIG:
case STATE_IN_RECONFIG:
// Can start config again with no trouble; but don't redo
// oldUsage/oldMaxBuffers
return this;
case STATE_CONFIGURED:
if (stream_type == CAMERA3_STREAM_INPUT) {
ALOGE("%s: Cannot configure an input stream twice",
__FUNCTION__);
return NULL;
} else if (hasOutstandingBuffersLocked()) {
ALOGE("%s: Cannot configure stream; has outstanding buffers",
__FUNCTION__);
return NULL;
}
break;
default:
ALOGE("%s: Unknown state %d", __FUNCTION__, mState);
return NULL;
}
oldUsage = camera3_stream::usage;
oldMaxBuffers = camera3_stream::max_buffers;
res = getEndpointUsage(&(camera3_stream::usage));
if (res != OK) {
ALOGE("%s: Cannot query consumer endpoint usage!",
__FUNCTION__);
return NULL;
}
// Stop tracking if currently doing so
if (mStatusId != StatusTracker::NO_STATUS_ID) {
sp<StatusTracker> statusTracker = mStatusTracker.promote();
if (statusTracker != 0) {
statusTracker->removeComponent(mStatusId);
}
mStatusId = StatusTracker::NO_STATUS_ID;
}
if (mState == STATE_CONSTRUCTED) {
mState = STATE_IN_CONFIG;
} else { // mState == STATE_CONFIGURED
mState = STATE_IN_RECONFIG;
}
return this;
}
bool Camera3Stream::hasOutstandingBuffers() const {
ATRACE_CALL();
Mutex::Autolock l(mLock);
return hasOutstandingBuffersLocked();
}
