AudioFlinger: Extract inner Track classes
Finish removing inner Track classes from AudioFlinger.
Test: atest audiorecord_tests audiotrack_tests audiorouting_tests trackplayerbase_tests audiosystem_tests
Test: atest AudioTrackTest AudioRecordTest
Test: YouTube and Camera
Bug: 288339104
Bug: 288468076
Merged-In: Ib44c7eb854f9d447aa11223d76373b00c413a778
Change-Id: Ib44c7eb854f9d447aa11223d76373b00c413a778
(cherry picked from commit 8d31fd23b1f731911b291f8704bf697c4135ad9d)
diff --git a/services/audioflinger/ResamplerBufferProvider.h b/services/audioflinger/ResamplerBufferProvider.h
new file mode 100644
index 0000000..b697743
--- /dev/null
+++ b/services/audioflinger/ResamplerBufferProvider.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+namespace android {
+
+class IAfRecordTrack;
+
+/* The ResamplerBufferProvider is used to retrieve recorded input data from the
+ * RecordThread. It maintains local state on the relative position of the read
+ * position of the RecordTrack compared with the RecordThread.
+ */
+class ResamplerBufferProvider : public AudioBufferProvider
+{
+public:
+ explicit ResamplerBufferProvider(IAfRecordTrack* recordTrack) :
+ mRecordTrack(recordTrack) {}
+
+ // called to set the ResamplerBufferProvider to head of the RecordThread data buffer,
+ // skipping any previous data read from the hal.
+ void reset();
+
+ /* Synchronizes RecordTrack position with the RecordThread.
+ * Calculates available frames and handle overruns if the RecordThread
+ * has advanced faster than the ResamplerBufferProvider has retrieved data.
+ * TODO: why not do this for every getNextBuffer?
+ *
+ * Parameters
+ * framesAvailable: pointer to optional output size_t to store record track
+ * frames available.
+ * hasOverrun: pointer to optional boolean, returns true if track has overrun.
+ */
+
+ void sync(size_t* framesAvailable = nullptr, bool* hasOverrun = nullptr);
+
+ // AudioBufferProvider interface
+ status_t getNextBuffer(AudioBufferProvider::Buffer* buffer) final;
+ void releaseBuffer(AudioBufferProvider::Buffer* buffer) final;
+
+ int32_t getFront() const { return mRsmpInFront; }
+ void setFront(int32_t front) { mRsmpInFront = front; }
+
+private:
+ IAfRecordTrack* const mRecordTrack;
+ size_t mRsmpInUnrel = 0; // unreleased frames remaining from
+ // most recent getNextBuffer
+ // for debug only
+ int32_t mRsmpInFront = 0; // next available frame
+ // rolling counter that is never cleared
+};
+
+} // namespace android
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