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-rw-r--r--include/media/AudioEffect.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/include/media/AudioEffect.h b/include/media/AudioEffect.h
index 4932d40..583695d 100644
--- a/include/media/AudioEffect.h
+++ b/include/media/AudioEffect.h
@@ -133,10 +133,11 @@ public:
*
* Returned value
* *descriptor updated with descriptors of pre processings enabled by default
- * *count number of descriptors returned if returned status is N_ERROR.
+ * *count number of descriptors returned if returned status is NO_ERROR.
* total number of pre processing enabled by default if returned status is
* NO_MEMORY. This happens if the count passed as input is less than the number
- * of descriptors to return
+ * of descriptors to return.
+ * *count is limited to kMaxPreProcessing on return.
*/
static status_t queryDefaultPreProcessing(int audioSession,
effect_descriptor_t *descriptors,
@@ -391,6 +392,10 @@ public:
*/
static status_t guidToString(const effect_uuid_t *guid, char *str, size_t maxLen);
+ // kMaxPreProcessing is a reasonable value for the maximum number of preprocessing effects
+ // that can be applied simultaneously.
+ static const uint32_t kMaxPreProcessing = 10;
+
protected:
bool mEnabled; // enable state
int32_t mSessionId; // audio session ID