Move libnbaio out of AudioFlinger

libnbaio is now a separate shared library from AudioFlinger, rather
than a static library used only by AudioFlinger.

AudioBufferProvider interface is now also independent of AudioFlinger,
moved to include/media/

Change-Id: I9bb62ffbc38d42a38b0af76e66da5e9ab1e0e21b

1 files changed, 52 insertions, 0 deletions

diff --git a/include/media/nbaio/SourceAudioBufferProvider.h b/include/media/nbaio/SourceAudioBufferProvider.h
new file mode 100644
index 0000000..c08331b
--- /dev/null
+++ b/include/media/nbaio/SourceAudioBufferProvider.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+// Implementation of AudioBufferProvider that wraps an NBAIO_Source
+
+#ifndef ANDROID_SOURCE_AUDIO_BUFFER_PROVIDER_H
+#define ANDROID_SOURCE_AUDIO_BUFFER_PROVIDER_H
+
+#include "NBAIO.h"
+#include <media/ExtendedAudioBufferProvider.h>
+
+namespace android {
+
+class SourceAudioBufferProvider : public ExtendedAudioBufferProvider {
+
+public:
+    SourceAudioBufferProvider(const sp<NBAIO_Source>& source);
+    virtual ~SourceAudioBufferProvider();
+
+    // AudioBufferProvider interface
+    virtual status_t getNextBuffer(Buffer *buffer, int64_t pts);
+    virtual void     releaseBuffer(Buffer *buffer);
+
+    // ExtendedAudioBufferProvider interface
+    virtual size_t   framesReady() const;
+
+private:
+    const sp<NBAIO_Source> mSource;     // the wrapped source
+    /*const*/ size_t    mFrameBitShift; // log2(frame size in bytes)
+    void*               mAllocated; // pointer to base of allocated memory
+    size_t              mSize;      // size of mAllocated in frames
+    size_t              mOffset;    // frame offset within mAllocated of valid data
+    size_t              mRemaining; // frame count within mAllocated of valid data
+    size_t              mGetCount;  // buffer.frameCount of the most recent getNextBuffer
+};
+
+}   // namespace android
+
+#endif  // ANDROID_SOURCE_AUDIO_BUFFER_PROVIDER_H