am bc69c8ba: DO NOT MERGE: Camera: delete preview callback when preview size is changed

* commit 'bc69c8ba9a8fc881603669205a56d0ca1b572a95':
  DO NOT MERGE: Camera: delete preview callback when preview size is changed

1 files changed, 16 insertions, 0 deletions

diff --git a/services/camera/libcameraservice/api1/Camera2Client.cpp b/services/camera/libcameraservice/api1/Camera2Client.cpp
index 50a5084..af23557 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.cpp
+++ b/services/camera/libcameraservice/api1/Camera2Client.cpp
@@ -734,6 +734,7 @@ status_t Camera2Client::startPreviewL(Parameters &params, bool restart) {
         return OK;
     }
     params.state = Parameters::STOPPED;
+    int lastPreviewStreamId = mStreamingProcessor->getPreviewStreamId();
 
     res = mStreamingProcessor->updatePreviewStream(params);
     if (res != OK) {
@@ -742,6 +743,8 @@ status_t Camera2Client::startPreviewL(Parameters &params, bool restart) {
         return res;
     }
 
+    bool previewStreamChanged = mStreamingProcessor->getPreviewStreamId() != lastPreviewStreamId;
+
     // We could wait to create the JPEG output stream until first actual use
     // (first takePicture call). However, this would substantially increase the
     // first capture latency on HAL3 devices, and potentially on some HAL2
@@ -791,6 +794,19 @@ status_t Camera2Client::startPreviewL(Parameters &params, bool restart) {
             return res;
         }
         outputStreams.push(getCallbackStreamId());
+    } else if (previewStreamChanged && mCallbackProcessor->getStreamId() != NO_STREAM) {
+        /**
+         * Delete the unused callback stream when preview stream is changed and
+         * preview is not enabled. Don't need stop preview stream as preview is in
+         * STOPPED state now.
+         */
+        ALOGV("%s: Camera %d: Delete unused preview callback stream.",  __FUNCTION__, mCameraId);
+        res = mCallbackProcessor->deleteStream();
+        if (res != OK) {
+            ALOGE("%s: Camera %d: Unable to delete callback stream %s (%d)",
+                    __FUNCTION__, mCameraId, strerror(-res), res);
+            return res;
+        }
     }
     if (params.zslMode && !params.recordingHint) {
         res = updateProcessorStream(mZslProcessor, params);