audio: add methods and structures for streamin MMAP mode
Bug: 33398120
Test: make marlin-eng with ENABLE_TREBLE true
Change-Id: I65c5c7ba0a94ba47dca78ace38ef3ae75ea7e3bf
diff --git a/audio/2.0/IStream.hal b/audio/2.0/IStream.hal
index dc43346..5c88a69 100644
--- a/audio/2.0/IStream.hal
+++ b/audio/2.0/IStream.hal
@@ -227,4 +227,56 @@
* @param fd dump file descriptor.
*/
debugDump(handle fd);
+
+ /*
+ * Called by the framework to start a stream operating in mmap mode.
+ * createMmapBuffer() must be called before calling start().
+ * Function only implemented by streams operating in mmap mode.
+ *
+ * @return retval OK in case the success.
+ * NOT_SUPPORTED on non mmap mode streams
+ * INVALID_STATE if called out of sequence
+ */
+ start() generates (Result retval);
+
+ /**
+ * Called by the framework to stop a stream operating in mmap mode.
+ * Function only implemented by streams operating in mmap mode.
+ *
+ * @return retval OK in case the succes.
+ * NOT_SUPPORTED on non mmap mode streams
+ * INVALID_STATE if called out of sequence
+ */
+ stop() generates (Result retval) ;
+
+ /*
+ * Called by the framework to retrieve information on the mmap buffer used for audio
+ * samples transfer.
+ * Function only implemented by streams operating in mmap mode.
+ *
+ * @param minSizeFrames minimum buffer size requested. The actual buffer
+ * size returned in struct MmapBufferInfo can be larger.
+ * @return retval OK in case the success.
+ * NOT_SUPPORTED on non mmap mode streams
+ * NOT_INITIALIZED in case of memory allocation error
+ * INVALID_ARGUMENTS if the requested buffer size is too large
+ * INVALID_STATE if called out of sequence
+ * @return info a MmapBufferInfo struct containing information on the MMMAP buffer created.
+ */
+ createMmapBuffer(int32_t minSizeFrames)
+ generates (Result retval, MmapBufferInfo info);
+
+ /*
+ * Called by the framework to read current read/write position in the mmap buffer
+ * with associated time stamp.
+ * Function only implemented by streams operating in mmap mode.
+ *
+ * @return retval OK in case the success.
+ * NOT_SUPPORTED on non mmap mode streams
+ * INVALID_STATE if called out of sequence
+ * @return position a MmapPosition struct containing current HW read/write position in frames
+ * with associated time stamp.
+ */
+ getMmapPosition()
+ generates (Result retval, MmapPosition position);
};