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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019-2021, Google Inc.
*
* camera_request.cpp - libcamera Android Camera Request Descriptor
*/
#include "camera_request.h"
#include <libcamera/base/span.h>
#include "camera_buffer.h"
using namespace libcamera;
/*
* \class Camera3RequestDescriptor
*
* A utility class that groups information about a capture request to be later
* reused at request complete time to notify the framework.
*/
Camera3RequestDescriptor::Camera3RequestDescriptor(
Camera *camera, const camera3_capture_request_t *camera3Request)
{
frameNumber_ = camera3Request->frame_number;
/* Copy the camera3 request stream information for later access. */
const Span<const camera3_stream_buffer_t> buffers{
camera3Request->output_buffers,
camera3Request->num_output_buffers
};
buffers_.reserve(buffers.size());
for (const camera3_stream_buffer_t &buffer : buffers) {
CameraStream *stream =
static_cast<CameraStream *>(buffer.stream->priv);
buffers_.emplace_back(stream, buffer, this);
}
/* Clone the controls associated with the camera3 request. */
settings_ = CameraMetadata(camera3Request->settings);
/*
* Create the CaptureRequest, stored as a unique_ptr<> to tie its
* lifetime to the descriptor.
*/
request_ = camera->createRequest(reinterpret_cast<uint64_t>(this));
}
Camera3RequestDescriptor::~Camera3RequestDescriptor() = default;
/**
* \struct Camera3RequestDescriptor::StreamBuffer
* \brief Group information for per-stream buffer of Camera3RequestDescriptor
*
* A capture request placed to the libcamera HAL can contain multiple streams.
* Each stream will have an associated buffer to be filled. StreamBuffer
* tracks this buffer with contextual information which aids in the stream's
* generation. The generation of the stream will depend on its type (refer to
* the CameraStream::Type documentation).
*
* \var Camera3RequestDescriptor::StreamBuffer::stream
* \brief Pointer to the corresponding CameraStream
*
* \var Camera3RequestDescriptor::StreamBuffer::camera3Buffer
* \brief Native handle to the buffer
*
* \var Camera3RequestDescriptor::StreamBuffer::frameBuffer
* \brief Encapsulate the dmabuf handle inside a libcamera::FrameBuffer for
* direct streams
*
* \var Camera3RequestDescriptor::StreamBuffer::fence
* \brief Acquire fence of the buffer
*
* \var Camera3RequestDescriptor::StreamBuffer::status
* \brief Track the status of the buffer
*
* \var Camera3RequestDescriptor::StreamBuffer::internalBuffer
* \brief Pointer to a buffer internally handled by CameraStream (if any)
*
* \var Camera3RequestDescriptor::StreamBuffer::srcBuffer
* \brief Pointer to the source frame buffer used for post-processing
*
* \var Camera3RequestDescriptor::StreamBuffer::dstBuffer
* \brief Pointer to the destination frame buffer used for post-processing
*
* \var Camera3RequestDescriptor::StreamBuffer::request
* \brief Back pointer to the Camera3RequestDescriptor to which the StreamBuffer belongs
*/
Camera3RequestDescriptor::StreamBuffer::StreamBuffer(
CameraStream *cameraStream, const camera3_stream_buffer_t &buffer,
Camera3RequestDescriptor *requestDescriptor)
: stream(cameraStream), camera3Buffer(buffer.buffer),
fence(buffer.acquire_fence), request(requestDescriptor)
{
}
Camera3RequestDescriptor::StreamBuffer::~StreamBuffer() = default;
Camera3RequestDescriptor::StreamBuffer::StreamBuffer(StreamBuffer &&) = default;
Camera3RequestDescriptor::StreamBuffer &
Camera3RequestDescriptor::StreamBuffer::operator=(Camera3RequestDescriptor::StreamBuffer &&) = default;
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