1 files changed, 108 insertions, 0 deletions
diff --git a/include/media/IAudioTrack.h b/include/media/IAudioTrack.h
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+++ b/include/media/IAudioTrack.h
@@ -0,0 +1,108 @@
+/*
+ * 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_IAUDIOTRACK_H
+#define ANDROID_IAUDIOTRACK_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/RefBase.h>
+#include <utils/Errors.h>
+#include <binder/IInterface.h>
+#include <binder/IMemory.h>
+#include <utils/LinearTransform.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+class IAudioTrack : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(AudioTrack);
+
+    /* Get this track's control block */
+    virtual sp<IMemory> getCblk() const = 0;
+
+    /* After it's created the track is not active. Call start() to
+     * make it active. If set, the callback will start being called.
+     * tid identifies the client callback thread, or 0 if not needed.
+     */
+    virtual status_t    start(pid_t tid) = 0;
+
+    /* Stop a track. If set, the callback will cease being called and
+     * obtainBuffer will return an error. Buffers that are already released
+     * will continue to be processed, unless/until flush() is called.
+     */
+    virtual void        stop() = 0;
+
+    /* Flush a stopped or paused track. All pending/released buffers are discarded.
+     * This function has no effect if the track is not stopped or paused.
+     */
+    virtual void        flush() = 0;
+
+    /* Mute or unmute this track.
+     * While muted, the callback, if set, is still called.
+     */
+    virtual void        mute(bool) = 0;
+
+    /* Pause a track. If set, the callback will cease being called and
+     * obtainBuffer will return an error. Buffers that are already released
+     * will continue to be processed, unless/until flush() is called.
+     */
+    virtual void        pause() = 0;
+
+    /* Attach track auxiliary output to specified effect. Use effectId = 0
+     * to detach track from effect.
+     */
+    virtual status_t    attachAuxEffect(int effectId) = 0;
+
+
+    /* Allocate a shared memory buffer suitable for holding timed audio
+       samples */
+    virtual status_t    allocateTimedBuffer(size_t size,
+                                            sp<IMemory>* buffer) = 0;
+
+    /* Queue a buffer obtained via allocateTimedBuffer for playback at the given
+       timestamp */
+    virtual status_t    queueTimedBuffer(const sp<IMemory>& buffer,
+                                         int64_t pts) = 0;
+
+    /* Define the linear transform that will be applied to the timestamps
+       given to queueTimedBuffer (which are expressed in media time).
+       Target specifies whether this transform converts media time to local time
+       or Tungsten time. The values for target are defined in AudioTrack.h */
+    virtual status_t    setMediaTimeTransform(const LinearTransform& xform,
+                                              int target) = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+class BnAudioTrack : public BnInterface<IAudioTrack>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_IAUDIOTRACK_H