Camera: add interface to evict obsolete buffer caches
Test: fix CTS ReprocessCaptureTest
Bug: 34461678
Change-Id: Icde654b0c8423c31d7d39d180913ffa374e7de3c
diff --git a/camera/device/3.2/ICameraDeviceSession.hal b/camera/device/3.2/ICameraDeviceSession.hal
index e186c8d..731fc76 100644
--- a/camera/device/3.2/ICameraDeviceSession.hal
+++ b/camera/device/3.2/ICameraDeviceSession.hal
@@ -183,6 +183,11 @@
* client, the HAL must process the requests in order of lowest index to
* highest index.
*
+ * The cachesToRemove argument contains a list of buffer caches (see
+ * StreamBuffer document for more information on buffer cache) to be removed
+ * by camera HAL. Camera HAL must remove these cache entries whether or not
+ * this method returns OK.
+ *
* The actual request processing is asynchronous, with the results of
* capture being returned by the HAL through the processCaptureResult()
* call. This call requires the result metadata to be available, but output
@@ -238,7 +243,8 @@
* that HAL processed successfully before HAL runs into an error.
*
*/
- processCaptureRequest(vec<CaptureRequest> requests)
+ processCaptureRequest(vec<CaptureRequest> requests,
+ vec<BufferCache> cachesToRemove)
generates (Status status, uint32_t numRequestProcessed);
/**
diff --git a/camera/device/3.2/default/CameraDeviceSession.cpp b/camera/device/3.2/default/CameraDeviceSession.cpp
index fb1d1ff..5b3024b 100644
--- a/camera/device/3.2/default/CameraDeviceSession.cpp
+++ b/camera/device/3.2/default/CameraDeviceSession.cpp
@@ -678,8 +678,32 @@
mCirculatingBuffers.erase(id);
}
+void CameraDeviceSession::updateBufferCaches(const hidl_vec<BufferCache>& cachesToRemove) {
+ Mutex::Autolock _l(mInflightLock);
+ for (auto& cache : cachesToRemove) {
+ auto cbsIt = mCirculatingBuffers.find(cache.streamId);
+ if (cbsIt == mCirculatingBuffers.end()) {
+ // The stream could have been removed
+ continue;
+ }
+ CirculatingBuffers& cbs = cbsIt->second;
+ auto it = cbs.find(cache.bufferId);
+ if (it != cbs.end()) {
+ sHandleImporter.freeBuffer(it->second);
+ cbs.erase(it);
+ } else {
+ ALOGE("%s: stream %d buffer %" PRIu64 " is not cached",
+ __FUNCTION__, cache.streamId, cache.bufferId);
+ }
+ }
+}
+
Return<void> CameraDeviceSession::processCaptureRequest(
- const hidl_vec<CaptureRequest>& requests, processCaptureRequest_cb _hidl_cb) {
+ const hidl_vec<CaptureRequest>& requests,
+ const hidl_vec<BufferCache>& cachesToRemove,
+ processCaptureRequest_cb _hidl_cb) {
+ updateBufferCaches(cachesToRemove);
+
uint32_t numRequestProcessed = 0;
Status s = Status::OK;
for (size_t i = 0; i < requests.size(); i++, numRequestProcessed++) {
diff --git a/camera/device/3.2/default/CameraDeviceSession.h b/camera/device/3.2/default/CameraDeviceSession.h
index 8923c05..781056e 100644
--- a/camera/device/3.2/default/CameraDeviceSession.h
+++ b/camera/device/3.2/default/CameraDeviceSession.h
@@ -85,7 +85,9 @@
Return<void> configureStreams(
const StreamConfiguration& requestedConfiguration, configureStreams_cb _hidl_cb) override;
Return<void> processCaptureRequest(
- const hidl_vec<CaptureRequest>& requests, processCaptureRequest_cb _hidl_cb) override;
+ const hidl_vec<CaptureRequest>& requests,
+ const hidl_vec<BufferCache>& cachesToRemove,
+ processCaptureRequest_cb _hidl_cb) override;
Return<Status> flush() override;
Return<void> close() override;
@@ -234,6 +236,8 @@
void cleanupBuffersLocked(int id);
+ void updateBufferCaches(const hidl_vec<BufferCache>& cachesToRemove);
+
Status processOneCaptureRequest(const CaptureRequest& request);
/**
* Static callback forwarding methods from HAL to instance
diff --git a/camera/device/3.2/types.hal b/camera/device/3.2/types.hal
index fd75528..5ae7a18 100644
--- a/camera/device/3.2/types.hal
+++ b/camera/device/3.2/types.hal
@@ -958,3 +958,25 @@
uint32_t partialResult;
};
+
+/**
+ * BufferCache:
+ *
+ * A list of cached bufferIds associated with a certain stream.
+ * Buffers are passed between camera service and camera HAL via bufferId except
+ * the first time a new buffer is being passed to HAL in CaptureRequest. Camera
+ * service and camera HAL therefore need to maintain a cached map of bufferId
+ * and corresponing native handle.
+ *
+ */
+struct BufferCache {
+ /**
+ * The ID of the stream this list is associated with.
+ */
+ int32_t streamId;
+
+ /**
+ * A cached buffer ID associated with streamId.
+ */
+ uint64_t bufferId;
+};