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Diffstat (limited to 'services/camera/libcameraservice/camera3/Camera3ZslStream.h')
-rw-r--r-- | services/camera/libcameraservice/camera3/Camera3ZslStream.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/services/camera/libcameraservice/camera3/Camera3ZslStream.h b/services/camera/libcameraservice/camera3/Camera3ZslStream.h new file mode 100644 index 0000000..c7f4490 --- /dev/null +++ b/services/camera/libcameraservice/camera3/Camera3ZslStream.h @@ -0,0 +1,105 @@ +/* + * Copyright (C) 2013 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_SERVERS_CAMERA3_ZSL_STREAM_H +#define ANDROID_SERVERS_CAMERA3_ZSL_STREAM_H + +#include <utils/RefBase.h> +#include <gui/Surface.h> +#include <gui/RingBufferConsumer.h> + +#include "Camera3OutputStream.h" + +namespace android { + +namespace camera3 { + +/** + * A class for managing a single opaque ZSL stream to/from the camera device. + * This acts as a bidirectional stream at the HAL layer, caching and discarding + * most output buffers, and when directed, pushes a buffer back to the HAL for + * processing. + */ +class Camera3ZslStream : + public Camera3OutputStream { + public: + /** + * Set up a ZSL stream of a given resolution. Depth is the number of buffers + * cached within the stream that can be retrieved for input. + */ + Camera3ZslStream(int id, uint32_t width, uint32_t height, int depth); + ~Camera3ZslStream(); + + virtual void dump(int fd, const Vector<String16> &args) const; + + enum { NO_BUFFER_AVAILABLE = BufferQueue::NO_BUFFER_AVAILABLE }; + + /** + * Locate a buffer matching this timestamp in the RingBufferConsumer, + * and mark it to be queued at the next getInputBufferLocked invocation. + * + * Errors: Returns NO_BUFFER_AVAILABLE if we could not find a match. + * + */ + status_t enqueueInputBufferByTimestamp(nsecs_t timestamp, + nsecs_t* actualTimestamp); + + /** + * Clears the buffers that can be used by enqueueInputBufferByTimestamp + */ + status_t clearInputRingBuffer(); + + protected: + + /** + * Camera3OutputStreamInterface implementation + */ + status_t setTransform(int transform); + + private: + + int mDepth; + // Input buffers pending to be queued into HAL + List<sp<RingBufferConsumer::PinnedBufferItem> > mInputBufferQueue; + sp<RingBufferConsumer> mProducer; + + // Input buffers in flight to HAL + Vector<sp<RingBufferConsumer::PinnedBufferItem> > mBuffersInFlight; + + /** + * Camera3Stream interface + */ + + // getInputBuffer/returnInputBuffer operate the input stream side of the + // ZslStream. + virtual status_t getInputBufferLocked(camera3_stream_buffer *buffer); + virtual status_t returnInputBufferLocked( + const camera3_stream_buffer &buffer); + + // Actual body to return either input or output buffers + virtual status_t returnBufferCheckedLocked( + const camera3_stream_buffer &buffer, + nsecs_t timestamp, + bool output, + /*out*/ + sp<Fence> *releaseFenceOut); +}; // class Camera3ZslStream + +}; // namespace camera3 + +}; // namespace android + +#endif |