Adding SurfaceEncoder for encoding FilterFrames

Adding SurfaceEncoder which can be used to encode
custom frame data. In a sense, it is reverse
of what SurfaceTexture does.

SurfaceEncoder takes in frames from a native window and
passes them to an encoder, thus acting like a MediaSource.
It uses GRAlloc buffers underneath for passing data.
The client side sets the geometry, format in the beginning,
which cannot be changed while the recording is going on.

Currently, there is no common pixel format that both
GRAlloc and HAL understand.
Also, the encoder cannot encode using the data from the GRAlloc
buffers.

The SurfaceEncoder_test examines mainly the buffer passage
since true encoding cannot be done at this point.
SimpleDummyRecorder 'reads' the frames in the same thread
as the start(), whereas DummyRecorder 'reads' in a separate
thread much like the MPEG4Writer. The test with DummyRecorder
is much closer to the real encoding implementation.

Related to bug id: 4529323

Change-Id: I58ec19a150f8fe4d6195196dc44f55002b46c7c8

1 files changed, 58 insertions, 0 deletions

diff --git a/media/libstagefright/tests/DummyRecorder.h b/media/libstagefright/tests/DummyRecorder.h
new file mode 100644
index 0000000..1cbea1b
--- /dev/null
+++ b/media/libstagefright/tests/DummyRecorder.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2011 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 DUMMY_RECORDER_H_
+#define DUMMY_RECORDER_H_
+
+#include <pthread.h>
+#include <utils/String8.h>
+#include <media/stagefright/foundation/ABase.h>
+
+
+namespace android {
+
+class MediaSource;
+class MediaBuffer;
+
+class DummyRecorder {
+    public:
+    // The media source from which this will receive frames
+    sp<MediaSource> mSource;
+    bool mStarted;
+    pthread_t mThread;
+
+    status_t start();
+    status_t stop();
+
+    // actual entry point for the thread
+    void readFromSource();
+
+    // static function to wrap the actual thread entry point
+    static void *threadWrapper(void *pthis);
+
+    DummyRecorder(const sp<MediaSource> &source) : mSource(source)
+                                                    , mStarted(false) {}
+    ~DummyRecorder( ) {}
+
+    private:
+
+    DISALLOW_EVIL_CONSTRUCTORS(DummyRecorder);
+};
+
+} // end of namespace android
+#endif
+
+