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libcamera: stream: Add Stream memory type

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Define the memory type a Stream uses and allow application to set it
through the associated StreamConfiguration.

A Stream can use either internal or external memory allocation methods,
depending on where the data produced by the stream is actually saved.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Jacopo Mondi 2019-06-28 09:13:34 +02:00 • committed by Laurent Pinchart
parent be3e3ebc92
commit 99e1e786b4
3 changed files with 42 additions and 5 deletions
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10
include/libcamera/stream.h
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@ -35,6 +35,11 @@ private:
std::map<unsigned int, std::vector<SizeRange>> formats_;
};
enum MemoryType {
InternalMemory,
ExternalMemory,
};
struct StreamConfiguration {
StreamConfiguration();
StreamConfiguration(const StreamFormats &formats);
@ -42,6 +47,7 @@ struct StreamConfiguration {
unsigned int pixelFormat;
Size size;
MemoryType memoryType;
unsigned int bufferCount;
Stream *stream() const { return stream_; }
@ -73,15 +79,17 @@ public:
BufferPool &bufferPool() { return bufferPool_; }
std::vector<BufferMemory> &buffers() { return bufferPool_.buffers(); }
const StreamConfiguration &configuration() const { return configuration_; }
MemoryType memoryType() const { return memoryType_; }
protected:
friend class Camera;
void createBuffers(unsigned int count);
void createBuffers(MemoryType memory, unsigned int count);
void destroyBuffers();
BufferPool bufferPool_;
StreamConfiguration configuration_;
MemoryType memoryType_;
};
} /* namespace libcamera */