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libcamera: Remove dead code after switch to FrameBuffer

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Delete all dead code after switching to the FrameBuffer interface.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Niklas Söderlund 2019-12-18 17:38:38 +01:00
parent 66d4929c73
commit 164fbf17ff
5 changed files with 2 additions and 517 deletions
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61
include/libcamera/buffer.h
View file

@ -7,7 +7,6 @@
#ifndef __LIBCAMERA_BUFFER_H__
#define __LIBCAMERA_BUFFER_H__
#include <array>
#include <stdint.h>
#include <vector>
@ -16,7 +15,6 @@
namespace libcamera {
class Request;
class Stream;
struct FrameMetadata {
enum Status {
@ -71,65 +69,6 @@ private:
unsigned int cookie_;
};
class BufferMemory final
{
public:
const std::vector<FrameBuffer::Plane> &planes() const { return planes_; }
std::vector<FrameBuffer::Plane> &planes() { return planes_; }
private:
std::vector<FrameBuffer::Plane> planes_;
};
class BufferPool final
{
public:
~BufferPool();
void createBuffers(unsigned int count);
void destroyBuffers();
unsigned int count() const { return buffers_.size(); }
std::vector<BufferMemory> &buffers() { return buffers_; }
private:
std::vector<BufferMemory> buffers_;
};
class Buffer final
{
public:
Buffer(unsigned int index = -1, const Buffer *metadata = nullptr);
Buffer(const Buffer &) = delete;
Buffer &operator=(const Buffer &) = delete;
unsigned int index() const { return index_; }
const std::array<int, 3> &dmabufs() const { return dmabuf_; }
BufferMemory *mem() { return mem_; }
const FrameMetadata &metadata() const { return metadata_; };
Request *request() const { return request_; }
Stream *stream() const { return stream_; }
private:
friend class Camera;
friend class Request;
friend class Stream;
friend class V4L2VideoDevice;
void cancel();
unsigned int index_;
std::array<int, 3> dmabuf_;
BufferMemory *mem_;
FrameMetadata metadata_;
Request *request_;
Stream *stream_;
};
} /* namespace libcamera */
#endif /* __LIBCAMERA_BUFFER_H__ */

23
include/libcamera/stream.h
View file

@ -36,11 +36,6 @@ private:
std::map<PixelFormat, std::vector<SizeRange>> formats_;
};
enum MemoryType {
InternalMemory,
ExternalMemory,
};
struct StreamConfiguration {
StreamConfiguration();
StreamConfiguration(const StreamFormats &formats);
@ -48,7 +43,6 @@ struct StreamConfiguration {
PixelFormat pixelFormat;
Size size;
MemoryType memoryType;
unsigned int bufferCount;
Stream *stream() const { return stream_; }
@ -75,29 +69,12 @@ class Stream
public:
Stream();
std::unique_ptr<Buffer> createBuffer(unsigned int index);
std::unique_ptr<Buffer> createBuffer(const std::array<int, 3> &fds);
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;
int mapBuffer(const Buffer *buffer);
void unmapBuffer(const Buffer *buffer);
void createBuffers(MemoryType memory, unsigned int count);
void destroyBuffers();
BufferPool bufferPool_;
StreamConfiguration configuration_;
MemoryType memoryType_;
private:
std::vector<std::pair<std::array<int, 3>, unsigned int>> bufferCache_;
};
} /* namespace libcamera */

1
src/android/camera_device.cpp
View file

@ -641,7 +641,6 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list)
StreamConfiguration *streamConfiguration = &config_->at(0);
streamConfiguration->size.width = camera3Stream->width;
streamConfiguration->size.height = camera3Stream->height;
streamConfiguration->memoryType = ExternalMemory;
/*
* \todo We'll need to translate from Android defined pixel format codes

184
src/libcamera/buffer.cpp
View file

@ -96,190 +96,6 @@ LOG_DEFINE_CATEGORY(Buffer)
* \brief Array of per-plane metadata
*/
/**
* \class BufferMemory
* \brief A memory buffer to store an image
*
* The BufferMemory class represents the memory buffers used to store full frame
* images, which may contain multiple separate memory Plane objects if the
* image format is multi-planar.
*/
/**
* \fn BufferMemory::planes() const
* \brief Retrieve the planes within the buffer
* \return A const reference to a vector holding all planes within the buffer
*/
/**
* \fn BufferMemory::planes()
* \brief Retrieve the planes within the buffer
* \return A reference to a vector holding all planes within the buffer
*/
/**
* \class BufferPool
* \brief A pool of buffers
*
* The BufferPool class groups together a collection of Buffers to store frames.
* The buffers must be exported by a device before they can be imported into
* another device for further use.
*/
BufferPool::~BufferPool()
{
destroyBuffers();
}
/**
* \brief Create buffers in the Pool
* \param[in] count The number of buffers to create
*/
void BufferPool::createBuffers(unsigned int count)
{
buffers_.resize(count);
}
/**
* \brief Release all buffers from pool
*
* If no buffers have been created or if buffers have already been released no
* operation is performed.
*/
void BufferPool::destroyBuffers()
{
buffers_.resize(0);
}
/**
* \fn BufferPool::count()
* \brief Retrieve the number of buffers contained within the pool
* \return The number of buffers contained in the pool
*/
/**
* \fn BufferPool::buffers()
* \brief Retrieve all the buffers in the pool
* \return A vector containing all the buffers in the pool.
*/
/**
* \class Buffer
* \brief A buffer handle and dynamic metadata
*
* The Buffer class references a buffer memory and associates dynamic metadata
* related to the frame contained in the buffer. It allows referencing buffer
* memory through a single interface regardless of whether the memory is
* allocated internally in libcamera or provided externally through dmabuf.
*
* Buffer instances are allocated dynamically for a stream through
* Stream::createBuffer(), added to a request with Request::addBuffer() and
* deleted automatically after the request complete handler returns.
*/
/**
* \brief Construct a buffer not associated with any stream
*
* This method constructs an orphaned buffer not associated with any stream. It
* is not meant to be called by applications, they should instead create buffers
* for a stream with Stream::createBuffer().
*/
Buffer::Buffer(unsigned int index, const Buffer *metadata)
: index_(index), dmabuf_({ -1, -1, -1 }), request_(nullptr),
stream_(nullptr)
{
if (metadata)
metadata_ = metadata->metadata();
else
metadata_ = {};
metadata_.status = FrameMetadata::FrameSuccess;
}
/**
* \fn Buffer::index()
* \brief Retrieve the Buffer index
* \return The buffer index
*/
/**
* \fn Buffer::dmabufs()
* \brief Retrieve the dmabuf file descriptors for all buffer planes
*
* The dmabufs array contains one dmabuf file descriptor per plane. Unused
* entries are set to -1.
*
* \return The dmabuf file descriptors
*/
/**
* \fn Buffer::mem()
* \brief Retrieve the BufferMemory this buffer is associated with
*
* The association between the buffer and a BufferMemory instance is valid from
* the time the request containing this buffer is queued to a camera to the end
* of that request's completion handler.
*
* \return The BufferMemory this buffer is associated with
*/
/**
* \fn Buffer::metadata()
* \brief Retrieve the buffer metadata
*
* The buffer metadata is updated when the buffer contents are modified, for
* example when a frame has been captured to the buffer by the hardware.
*
* \return Metadata for the buffer
*/
/**
* \fn Buffer::request()
* \brief Retrieve the request this buffer belongs to
*
* The intended callers of this method are buffer completion handlers that
* need to associate a buffer to the request it belongs to.
*
* A Buffer is associated to a request by Request::addBuffer() and the
* association is valid until the buffer completes. The returned request
* pointer is valid only during that interval.
*
* \return The Request the Buffer belongs to, or nullptr if the buffer is
* either completed or not associated with a request
*/
/**
* \fn Buffer::stream()
* \brief Retrieve the stream this buffer is associated with
*
* A Buffer is associated to the stream that created it with
* Stream::createBuffer() and the association is valid until the buffer is
* destroyed. Buffer instances that are created directly are not associated
* with any stream.
*
* \return The Stream the Buffer is associated with, or nullptr if the buffer
* is not associated with a stream
*/
/**
* \brief Mark a buffer as cancel by setting its status to BufferCancelled
*/
void Buffer::cancel()
{
metadata_.status = FrameMetadata::FrameCancelled;
metadata_.sequence = 0;
metadata_.timestamp = 0;
metadata_.planes = {};
}
/**
* \var Buffer::request_
* \brief The request this buffer belongs to
*
* This member is intended to be set by Request::addBuffer() and
* Request::completeBuffer().
*/
/**
* \class FrameBuffer
* \brief Frame buffer data and its associated dynamic metadata

250
src/libcamera/stream.cpp
View file

@ -266,17 +266,6 @@ SizeRange StreamFormats::range(PixelFormat pixelformat) const
return range;
}
/**
* \enum MemoryType
* \brief Define the memory type used by a Stream
* \var MemoryType::InternalMemory
* The Stream uses memory allocated internally by the library and exported to
* applications.
* \var MemoryType::ExternalMemory
* The Stream uses memory allocated externally by application and imported in
* the library.
*/
/**
* \struct StreamConfiguration
* \brief Configuration parameters for a stream
@ -290,7 +279,7 @@ SizeRange StreamFormats::range(PixelFormat pixelformat) const
* handlers provied StreamFormats.
*/
StreamConfiguration::StreamConfiguration()
: pixelFormat(0), memoryType(InternalMemory), stream_(nullptr)
: pixelFormat(0), stream_(nullptr)
{
}
@ -298,8 +287,7 @@ StreamConfiguration::StreamConfiguration()
* \brief Construct a configuration with stream formats
*/
StreamConfiguration::StreamConfiguration(const StreamFormats &formats)
: pixelFormat(0), memoryType(InternalMemory), stream_(nullptr),
formats_(formats)
: pixelFormat(0), stream_(nullptr), formats_(formats)
{
}
@ -313,11 +301,6 @@ StreamConfiguration::StreamConfiguration(const StreamFormats &formats)
* \brief Stream pixel format
*/
/**
* \var StreamConfiguration::memoryType
* \brief The memory type the stream shall use
*/
/**
* \var StreamConfiguration::bufferCount
* \brief Requested number of buffers to allocate for the stream
@ -420,236 +403,12 @@ Stream::Stream()
{
}
/**
* \brief Create a Buffer instance referencing the memory buffer \a index
* \param[in] index The desired buffer index
*
* This method creates a Buffer instance that references a BufferMemory from
* the stream's buffers pool by its \a index. The index shall be lower than the
* number of buffers in the pool.
*
* This method is only valid for streams that use the InternalMemory type. It
* will return a null pointer when called on streams using the ExternalMemory
* type.
*
* \return A newly created Buffer on success or nullptr otherwise
*/
std::unique_ptr<Buffer> Stream::createBuffer(unsigned int index)
{
if (memoryType_ != InternalMemory) {
LOG(Stream, Error) << "Invalid stream memory type";
return nullptr;
}
if (index >= bufferPool_.count()) {
LOG(Stream, Error) << "Invalid buffer index " << index;
return nullptr;
}
Buffer *buffer = new Buffer();
buffer->index_ = index;
buffer->stream_ = this;
return std::unique_ptr<Buffer>(buffer);
}
/**
* \brief Create a Buffer instance that represents a memory area identified by
* dmabuf file descriptors
* \param[in] fds The dmabuf file descriptors for each plane
*
* This method creates a Buffer instance that references buffer memory
* allocated outside of libcamera through dmabuf file descriptors. The \a
* dmabuf array shall contain a file descriptor for each plane in the buffer,
* and unused entries shall be set to -1.
*
* The buffer is created without a valid index, as it does not yet map to any of
* the stream's BufferMemory instances. An index will be assigned at the time
* the buffer is queued to the camera in a request. Applications may thus
* create any number of Buffer instances, providing that no more than the
* number of buffers allocated for the stream are queued at any given time.
*
* This method is only valid for streams that use the ExternalMemory type. It
* will return a null pointer when called on streams using the InternalMemory
* type.
*
* \sa Stream::mapBuffer()
*
* \return A newly created Buffer on success or nullptr otherwise
*/
std::unique_ptr<Buffer> Stream::createBuffer(const std::array<int, 3> &fds)
{
if (memoryType_ != ExternalMemory) {
LOG(Stream, Error) << "Invalid stream memory type";
return nullptr;
}
Buffer *buffer = new Buffer();
buffer->dmabuf_ = fds;
buffer->stream_ = this;
return std::unique_ptr<Buffer>(buffer);
}
/**
* \fn Stream::bufferPool()
* \brief Retrieve the buffer pool for the stream
*
* The buffer pool handles the memory buffers used to store frames for the
* stream. It is initially created empty and shall be populated with
* buffers before being used.
*
* \return A reference to the buffer pool
*/
/**
* \fn Stream::buffers()
* \brief Retrieve the memory buffers in the Stream's buffer pool
* \return The list of stream's memory buffers
*/
/**
* \fn Stream::configuration()
* \brief Retrieve the active configuration of the stream
* \return The active configuration of the stream
*/
/**
* \fn Stream::memoryType()
* \brief Retrieve the stream memory type
* \return The memory type used by the stream
*/
/**
* \brief Map a Buffer to a buffer memory index
* \param[in] buffer The buffer to map to a buffer memory index
*
* Streams configured to use externally allocated memory need to maintain a
* best-effort association between the memory area the \a buffer represents
* and the associated buffer memory in the Stream's pool.
*
* The buffer memory to use, once the \a buffer reaches the video device,
* is selected using the index assigned to the \a buffer and to minimize
* relocations in the V4L2 back-end, this operation provides a best-effort
* caching mechanism that associates to the dmabuf file descriptors contained
* in the \a buffer the index of the buffer memory that was lastly queued with
* those file descriptors set.
*
* If the Stream uses internally allocated memory, the index of the memory
* buffer to use will match the one request at Stream::createBuffer(unsigned int)
* time, and no mapping is thus required.
*
* \return The buffer memory index for the buffer on success, or a negative
* error code otherwise
* \retval -ENOMEM No buffer memory was available to map the buffer
*/
int Stream::mapBuffer(const Buffer *buffer)
{
ASSERT(memoryType_ == ExternalMemory);
if (bufferCache_.empty())
return -ENOMEM;
const std::array<int, 3> &dmabufs = buffer->dmabufs();
/*
* Try to find a previously mapped buffer in the cache. If we miss, use
* the oldest entry in the cache.
*/
auto map = std::find_if(bufferCache_.begin(), bufferCache_.end(),
[&](std::pair<std::array<int, 3>, unsigned int> &entry) {
return entry.first == dmabufs;
});
if (map == bufferCache_.end())
map = bufferCache_.begin();
/*
* Update the dmabuf file descriptors of the entry. We can't assume that
* identical file descriptor numbers refer to the same dmabuf object as
* it may have been closed and its file descriptor reused. We thus need
* to update the plane's internally cached mmap()ed memory.
*/
unsigned int index = map->second;
BufferMemory *mem = &bufferPool_.buffers()[index];
mem->planes().clear();
for (unsigned int i = 0; i < dmabufs.size(); ++i) {
if (dmabufs[i] == -1)
break;
FrameBuffer::Plane plane;
plane.fd = FileDescriptor(dmabufs[i]);
plane.length = 0;
mem->planes().push_back(plane);
}
/* Remove the buffer from the cache and return its index. */
bufferCache_.erase(map);
return index;
}
/**
* \brief Unmap a Buffer from its buffer memory
* \param[in] buffer The buffer to unmap
*
* This method releases the buffer memory entry that was mapped by mapBuffer(),
* making it available for new mappings.
*/
void Stream::unmapBuffer(const Buffer *buffer)
{
ASSERT(memoryType_ == ExternalMemory);
bufferCache_.emplace_back(buffer->dmabufs(), buffer->index());
}
/**
* \brief Create buffers for the stream
* \param[in] count The number of buffers to create
* \param[in] memory The stream memory type
*
* Create \a count empty buffers in the Stream's buffer pool.
*/
void Stream::createBuffers(MemoryType memory, unsigned int count)
{
destroyBuffers();
if (count == 0)
return;
memoryType_ = memory;
bufferPool_.createBuffers(count);
/* Streams with internal memory usage do not need buffer mapping. */
if (memoryType_ == InternalMemory)
return;
/*
* Prepare for buffer mapping by adding all buffer memory entries to the
* cache.
*/
bufferCache_.clear();
for (unsigned int i = 0; i < bufferPool_.count(); ++i)
bufferCache_.emplace_back(std::array<int, 3>{ -1, -1, -1 }, i);
}
/**
* \brief Destroy buffers in the stream
*
* If no buffers have been created or if buffers have already been destroyed no
* operation is performed.
*/
void Stream::destroyBuffers()
{
bufferPool_.destroyBuffers();
}
/**
* \var Stream::bufferPool_
* \brief The pool of buffers associated with the stream
*
* The stream buffer pool is populated by the Camera class after a successful
* stream configuration.
*/
/**
* \var Stream::configuration_
* \brief The stream configuration
@ -659,9 +418,4 @@ void Stream::destroyBuffers()
* next call to Camera::configure() regardless of if it includes the stream.
*/
/**
* \var Stream::memoryType_
* \brief The stream memory type
*/
} /* namespace libcamera */