stagefright: add nonblocking MediaBufferGroup.acquire_buffer method

Bug: 15699665
Change-Id: I31c1ab4413c62ff3dd4e0d5b06a398064b4aaddd

1 files changed, 6 insertions, 3 deletions

diff --git a/include/media/stagefright/MediaBufferGroup.h b/include/media/stagefright/MediaBufferGroup.h
index 0488292..a006f7f 100644
--- a/include/media/stagefright/MediaBufferGroup.h
+++ b/include/media/stagefright/MediaBufferGroup.h
@@ -34,9 +34,12 @@ public:
 
     void add_buffer(MediaBuffer *buffer);
 
-    // Blocks until a buffer is available and returns it to the caller,
-    // the returned buffer will have a reference count of 1.
-    status_t acquire_buffer(MediaBuffer **buffer);
+    // If nonBlocking is false, it blocks until a buffer is available and
+    // passes it to the caller in *buffer, while returning OK.
+    // The returned buffer will have a reference count of 1.
+    // If nonBlocking is true and a buffer is not immediately available,
+    // buffer is set to NULL and it returns WOULD_BLOCK.
+    status_t acquire_buffer(MediaBuffer **buffer, bool nonBlocking = false);
 
 protected:
     virtual void signalBufferReturned(MediaBuffer *buffer);