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/*
* 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 STREAM_H_
#define STREAM_H_
#include <hardware/camera3.h>
#include <hardware/gralloc.h>
#include <system/graphics.h>
#include <utils/Mutex.h>
namespace default_camera_hal {
// Stream represents a single input or output stream for a camera device.
class Stream {
public:
Stream(int id, camera3_stream_t *s);
~Stream();
// validate that astream's parameters match this stream's parameters
bool isValidReuseStream(int id, camera3_stream_t *s);
// Register buffers with hardware
int registerBuffers(const camera3_stream_buffer_set_t *buf_set);
void setUsage(uint32_t usage);
void setMaxBuffers(uint32_t max_buffers);
int getType();
bool isInputType();
bool isOutputType();
bool isRegistered();
const char* typeToString(int type);
const char* formatToString(int format);
void dump(int fd);
// This stream is being reused. Used in stream configuration passes
bool mReuse;
private:
// Clean up buffer state. must be called with mLock held.
void unregisterBuffers_L();
// The camera device id this stream belongs to
const int mId;
// Handle to framework's stream, used as a cookie for buffers
camera3_stream_t *mStream;
// Stream type: CAMERA3_STREAM_* (see <hardware/camera3.h>)
const int mType;
// Width in pixels of the buffers in this stream
const uint32_t mWidth;
// Height in pixels of the buffers in this stream
const uint32_t mHeight;
// Gralloc format: HAL_PIXEL_FORMAT_* (see <system/graphics.h>)
const int mFormat;
// Gralloc usage mask : GRALLOC_USAGE_* (see <hardware/gralloc.h>)
uint32_t mUsage;
// Max simultaneous in-flight buffers for this stream
uint32_t mMaxBuffers;
// Buffers have been registered for this stream and are ready
bool mRegistered;
// Array of handles to buffers currently in use by the stream
buffer_handle_t **mBuffers;
// Number of buffers in mBuffers
unsigned int mNumBuffers;
// Lock protecting the Stream object for modifications
android::Mutex mLock;
};
} // namespace default_camera_hal
#endif // STREAM_H_
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