Multi-client recording

Supports multiple clients both at native sample rate and with resampling.

Change-Id: Icea55b4fd30751761b7debaa3ce016c79e712d8d

1 files changed, 29 insertions, 0 deletions

diff --git a/services/audioflinger/RecordTracks.h b/services/audioflinger/RecordTracks.h
index fc3171f..b40ac2f 100644
--- a/services/audioflinger/RecordTracks.h
+++ b/services/audioflinger/RecordTracks.h
@@ -59,4 +59,33 @@ private:
     // releaseBuffer() not overridden
 
     bool                mOverflow;  // overflow on most recent attempt to fill client buffer
+
+           // updated by RecordThread::readInputParameters()
+            AudioResampler                      *mResampler;
+
+            // interleaved stereo pairs of fixed-point signed Q19.12
+            int32_t                             *mRsmpOutBuffer;
+            // current allocated frame count for the above, which may be larger than needed
+            size_t                              mRsmpOutFrameCount;
+
+            size_t                              mRsmpInUnrel;   // unreleased frames remaining from
+                                                                // most recent getNextBuffer
+                                                                // for debug only
+
+            // rolling counter that is never cleared
+            int32_t                             mRsmpInFront;   // next available frame
+
+            AudioBufferProvider::Buffer mSink;  // references client's buffer sink in shared memory
+
+            // sync event triggering actual audio capture. Frames read before this event will
+            // be dropped and therefore not read by the application.
+            sp<SyncEvent>                       mSyncStartEvent;
+
+            // number of captured frames to drop after the start sync event has been received.
+            // when < 0, maximum frames to drop before starting capture even if sync event is
+            // not received
+            ssize_t                             mFramesToDrop;
+
+            // used by resampler to find source frames
+            ResamplerBufferProvider *mResamplerBufferProvider;
 };