auto import from //depot/cupcake/@135843
diff --git a/include/private/media/AudioTrackShared.h b/include/private/media/AudioTrackShared.h
new file mode 100644
index 0000000..1991aa7
--- /dev/null
+++ b/include/private/media/AudioTrackShared.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+
+#ifndef ANDROID_AUDIO_TRACK_SHARED_H
+#define ANDROID_AUDIO_TRACK_SHARED_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/threads.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+#define MAX_SAMPLE_RATE 65535
+#define THREAD_PRIORITY_AUDIO_CLIENT (ANDROID_PRIORITY_AUDIO)
+// Maximum cumulated timeout milliseconds before restarting audioflinger thread
+#define MAX_STARTUP_TIMEOUT_MS 3000 // Longer timeout period at startup to cope with A2DP init time
+#define MAX_RUN_TIMEOUT_MS 1000
+#define WAIT_PERIOD_MS 10
+
+
+struct audio_track_cblk_t
+{
+
+ // The data members are grouped so that members accessed frequently and in the same context
+ // are in the same line of data cache.
+ Mutex lock;
+ Condition cv;
+ volatile uint32_t user;
+ volatile uint32_t server;
+ uint32_t userBase;
+ uint32_t serverBase;
+ void* buffers;
+ uint32_t frameCount;
+ // Cache line boundary
+ uint32_t loopStart;
+ uint32_t loopEnd;
+ int loopCount;
+ volatile union {
+ uint16_t volume[2];
+ uint32_t volumeLR;
+ };
+ uint16_t sampleRate;
+ uint16_t channels;
+ int16_t flowControlFlag; // underrun (out) or overrrun (in) indication
+ uint8_t out; // out equals 1 for AudioTrack and 0 for AudioRecord
+ uint8_t forceReady;
+ uint16_t bufferTimeoutMs; // Maximum cumulated timeout before restarting audioflinger
+ uint16_t waitTimeMs; // Cumulated wait time
+ // Padding ensuring that data buffer starts on a cache line boundary (32 bytes).
+ // See AudioFlinger::TrackBase constructor
+ int32_t Padding[3];
+
+ audio_track_cblk_t();
+ uint32_t stepUser(uint32_t frameCount);
+ bool stepServer(uint32_t frameCount);
+ void* buffer(uint32_t offset) const;
+ uint32_t framesAvailable();
+ uint32_t framesAvailable_l();
+ uint32_t framesReady();
+};
+
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_AUDIO_TRACK_SHARED_H