Flush FastCapture PipeReader when starting after stop
Discards stale frames.
Bug: 30199985
Change-Id: Ie93a3784bf052aba6989d2ff1be92b1980b0c207
diff --git a/include/media/nbaio/NBAIO.h b/include/media/nbaio/NBAIO.h
index 120de4f..c22c476 100644
--- a/include/media/nbaio/NBAIO.h
+++ b/include/media/nbaio/NBAIO.h
@@ -266,6 +266,17 @@
// One or more frames were lost due to overrun, try again to read more recent data.
virtual ssize_t read(void *buffer, size_t count) = 0;
+ // Flush data from buffer. There is no notion of overrun as all data is dropped.
+ // Flushed frames also count towards frames read.
+ //
+ // Return value:
+ // >= 0 Number of frames successfully flushed
+ // < 0 status_t error occurred
+ // Errors:
+ // NEGOTIATE (Re-)negotiation is needed.
+ // INVALID_OPERATION Not implemented
+ virtual ssize_t flush() { return INVALID_OPERATION; }
+
// Transfer data from source using a series of callbacks. More suitable for zero-fill,
// synthesis, and non-contiguous transfers (e.g. circular buffer or readv).
// Inputs:
diff --git a/include/media/nbaio/PipeReader.h b/include/media/nbaio/PipeReader.h
index 7c733ad..00c2b3c 100644
--- a/include/media/nbaio/PipeReader.h
+++ b/include/media/nbaio/PipeReader.h
@@ -47,6 +47,8 @@
virtual ssize_t read(void *buffer, size_t count);
+ virtual ssize_t flush();
+
// NBAIO_Source end
#if 0 // until necessary