/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2021, Ideas On Board
*
* algorithm.cpp - IPA control algorithm interface
*/
#include "algorithm.h"
/**
* \file algorithm.h
* \brief Algorithm common interface
*/
namespace libcamera {
namespace ipa {
/**
* \class Algorithm
* \brief The base class for all IPA algorithms
* \tparam Module The IPA module type for this class of algorithms
*
* The Algorithm class defines a standard interface for IPA algorithms
* compatible with the \a Module. By abstracting algorithms, it makes possible
* the implementation of generic code to manage algorithms regardless of their
* specific type.
*
* To specialize the Algorithm class template, an IPA module shall specialize
* the Module class template with module-specific context and configuration
* types, and pass the specialized Module class as the \a Module template
* argument.
*/
/**
* \typedef Algorithm::Module
* \brief The IPA module type for this class of algorithms
*/
/**
* \fn Algorithm::init()
* \brief Initialize the Algorithm with tuning data
* \param[in] context The shared IPA context
* \param[in] tuningData The tuning data for the algorithm
*
* This function is called once, when the IPA module is initialized, to
* initialize the algorithm. The \a tuningData YamlObject contains the tuning
* data for algorithm.
*
* \return 0 if successful, an error code otherwise
*/
/**
* \fn Algorithm::configure()
* \brief Configure the Algorithm given an IPAConfigInfo
* \param[in] context The shared IPA context
* \param[in] configInfo The IPA configuration data, received from the pipeline
* handler
*
* Algorithms may implement a configure operation to pre-calculate
* parameters prior to commencing streaming.
*
* Configuration state may be stored in the IPASessionConfiguration structure of
* the IPAContext.
*
* \return 0 if successful, an error code otherwise
*/
/**
* \fn Algorithm::queueRequest()
* \brief Provide control values to the algorithm
* \param[in] context The shared IPA context
* \param[in] frame The frame number to apply the control values
* \param[in] frameContext The current frame's context
* \param[in] controls The list of user controls
*
* This function is called for each request queued to the camera. It provides
* the controls stored in the request to the algorithm. The \a frame number
* is the Request sequence number and identifies the desired corresponding
* frame to target for the controls to take effect.
*
* Algorithms shall read the applicable controls and store their value for later
* use during frame processing.
*/
/**
* \fn Algorithm::prepare()
* \brief Fill the \a params buffer with ISP processing parameters for a frame
* \param[in] context The shared IPA context
* \param[in] frame The frame context sequence number
* \param[in] frameContext The FrameContext for this frame
* \param[out] params The ISP specific parameters
*
* This function is called for every frame when the camera is running before it
* is processed by the ISP to prepare the ISP processing parameters for that
* frame.
*
* Algorithms shall fill in the parameter structure fields appropriately to
* configure the ISP processing blocks that they are responsible for. This
* includes setting fields and flags that enable those processing blocks.
*/
/**
* \fn Algorithm::process()
* \brief Process ISP statistics, and run algorithm operations
* \param[in] context The shared IPA context
* \param[in] frame The frame context sequence number
* \param[in] frameContext The current frame's context
* \param[in] stats The IPA statistics and ISP results
* \param[out] metadata Metadata for the frame, to be filled by the algorithm
*
* This function is called while camera is running for every frame processed by
* the ISP, to process statistics generated from that frame by the ISP.
* Algorithms shall use this data to run calculations, update their state
* accordingly, and fill the frame metadata.
*
* Processing shall not take an undue amount of time, and any extended or
* computationally expensive calculations or operations must be handled
* asynchronously in a separate thread.
*
* Algorithms can store state in their respective IPAFrameContext structures,
* and reference state from the IPAFrameContext of other algorithms.
*
* \todo Historical data may be required as part of the processing.
* Either the previous frame, or the IPAFrameContext state of the frame
* that generated the statistics for this operation may be required for
* some advanced algorithms to prevent oscillations or support control
* loops correctly. Only a single IPAFrameContext is available currently,
* and so any data stored may represent the results of the previously
* completed operations.
*
* Care shall be taken to ensure the ordering of access to the information
* such that the algorithms use up to date state as required.
*/
/**
* \class AlgorithmFactory
* \brief Registration of Algorithm classes and creation of instances
* \tparam _Algorithm The algorithm class type for this factory
*
* To facilitate instantiation of Algorithm classes, the AlgorithmFactory class
* implements auto-registration of algorithms with the IPA Module class. Each
* Algorithm subclass shall register itself using the REGISTER_IPA_ALGORITHM()
* macro, which will create a corresponding instance of an AlgorithmFactory and
* register it with the IPA Module.
*/
/**
* \fn AlgorithmFactory::AlgorithmFactory()
* \brief Construct an algorithm factory
* \param[in] name Name of the algorithm class
*
* Creating an instance of the factory automatically registers is with the IPA
* Module class, enabling creation of algorithm instances through
* Module::createAlgorithm().
*
* The factory \a name identifies the algorithm and shall be unique.
*/
/**
* \fn AlgorithmFactory::create()
* \brief Create an instance of the Algorithm corresponding to the factory
* \return A pointer to a newly constructed instance of the Algorithm subclass
* corresponding to the factory
*/
/**
* \def REGISTER_IPA_ALGORITHM
* \brief Register an algorithm with the IPA module
* \param[in] algorithm Class name of Algorithm derived class to register
* \param[in] name Name of the algorithm
*
* Register an Algorithm subclass with the IPA module to make it available for
* instantiation through Module::createAlgorithm(). The \a name identifies the
* algorithm and must be unique across all algorithms registered for the IPA
* module.
*/
} /* namespace ipa */
} /* namespace libcamera */
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Collabora Ltd.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
*
* gstlibcamera-utils.c - GStreamer libcamera Utility Function
*/
#include "gstlibcamera-utils.h"
#include <libcamera/formats.h>
using namespace libcamera;
static struct {
GstVideoFormat gst_format;
PixelFormat format;
} format_map[] = {
/* Compressed */
{ GST_VIDEO_FORMAT_ENCODED, formats::MJPEG },
/* RGB */
{ GST_VIDEO_FORMAT_RGB, formats::BGR888 },
{ GST_VIDEO_FORMAT_BGR, formats::RGB888 },
{ GST_VIDEO_FORMAT_ARGB, formats::BGRA8888 },
/* YUV Semiplanar */
{ GST_VIDEO_FORMAT_NV12, formats::NV12 },
{ GST_VIDEO_FORMAT_NV21, formats::NV21 },
{ GST_VIDEO_FORMAT_NV16, formats::NV16 },
{ GST_VIDEO_FORMAT_NV61, formats::NV61 },
{ GST_VIDEO_FORMAT_NV24, formats::NV24 },
/* YUV Planar */
{ GST_VIDEO_FORMAT_I420, formats::YUV420 },
{ GST_VIDEO_FORMAT_YV12, formats::YVU420 },
{ GST_VIDEO_FORMAT_Y42B, formats::YUV422 },
/* YUV Packed */
{ GST_VIDEO_FORMAT_UYVY, formats::UYVY },
{ GST_VIDEO_FORMAT_VYUY, formats::VYUY },
{ GST_VIDEO_FORMAT_YUY2, formats::YUYV },
{ GST_VIDEO_FORMAT_YVYU, formats::YVYU },
/* \todo NV42 is used in libcamera but is not mapped in GStreamer yet. */
};
static GstVideoFormat
pixel_format_to_gst_format(const PixelFormat &format)
{
for (const auto &item : format_map) {
if (item.format == format)
return item.gst_format;
}
return GST_VIDEO_FORMAT_UNKNOWN;
}
static PixelFormat
gst_format_to_pixel_format(GstVideoFormat gst_format)
{
if (gst_format == GST_VIDEO_FORMAT_ENCODED)
return PixelFormat{};
for (const auto &item : format_map)
if (item.gst_format == gst_format)
return item.format;
return PixelFormat{};
}
static GstStructure *
bare_structure_from_format(const PixelFormat &format)
{
GstVideoFormat gst_format = pixel_format_to_gst_format(format);
if (gst_format == GST_VIDEO_FORMAT_UNKNOWN)
return nullptr;
if (gst_format != GST_VIDEO_FORMAT_ENCODED)
return gst_structure_new("video/x-raw", "format", G_TYPE_STRING,
gst_video_format_to_string(gst_format), nullptr);
switch (format) {
case formats::MJPEG:
return gst_structure_new_empty("image/jpeg");
default:
return nullptr;
}
}
GstCaps *
gst_libcamera_stream_formats_to_caps(const StreamFormats &formats)
{
GstCaps *caps = gst_caps_new_empty();
for (PixelFormat pixelformat : formats.pixelformats()) {
g_autoptr(GstStructure) bare_s = bare_structure_from_format(pixelformat);
if (!bare_s) {
GST_WARNING("Unsupported DRM format %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS(pixelformat));
continue;
}
for (const Size &size : formats.sizes(pixelformat)) {
GstStructure *s = gst_structure_copy(bare_s);
gst_structure_set(s,
"width", G_TYPE_INT, size.width,
"height", G_TYPE_INT, size.height,
nullptr);
gst_caps_append_structure(caps, s);
}
const SizeRange &range = formats.range(pixelformat);
if (range.hStep && range.vStep) {
GstStructure *s = gst_structure_copy(bare_s);
GValue val = G_VALUE_INIT;
g_value_init(&val, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step(&val, range.min.width, range.max.width, range.hStep);
gst_structure_set_value(s, "width", &val);
gst_value_set_int_range_step(&val, range.min.height, range.max.height, range.vStep);
gst_structure_set_value(s, "height", &val);
g_value_unset(&val);
gst_caps_append_structure(caps, s);
}
}
return caps;
}
GstCaps *
gst_libcamera_stream_configuration_to_caps(const StreamConfiguration &stream_cfg)
{
GstCaps *caps = gst_caps_new_empty();
GstStructure *s = bare_structure_from_format(stream_cfg.pixelFormat);
gst_structure_set(s,
"width", G_TYPE_INT, stream_cfg.size.width,
"height", G_TYPE_INT, stream_cfg.size.height,
nullptr);
gst_caps_append_structure(caps, s);
return caps;
}
void
gst_libcamera_configure_stream_from_caps(StreamConfiguration &stream_cfg,
GstCaps *caps)
{
GstVideoFormat gst_format = pixel_format_to_gst_format(stream_cfg.pixelFormat);
guint i;
gint best_fixed = -1, best_in_range = -1;
GstStructure *s;
/*
* These are delta weight computed from:
* ABS(width - stream_cfg.size.width) * ABS(height - stream_cfg.size.height)
*/
guint best_fixed_delta = G_MAXUINT;
guint best_in_range_delta = G_MAXUINT;
/* First fixate the caps using default configuration value. */
g_assert(gst_caps_is_writable(caps));
/* Lookup the structure for a close match to the stream_cfg.size */
for (i = 0; i < gst_caps_get_size(caps); i++) {
s = gst_caps_get_structure(caps, i);
gint width, height;
guint delta;
if (gst_structure_has_field_typed(s, "width", G_TYPE_INT) &&
gst_structure_has_field_typed(s, "height", G_TYPE_INT)) {
gst_structure_get_int(s, "width", &width);
gst_structure_get_int(s, "height", &height);
delta = ABS(width - (gint)stream_cfg.size.width) * ABS(height - (gint)stream_cfg.size.height);
if (delta < best_fixed_delta) {
best_fixed_delta = delta;
best_fixed = i;
}
} else {
gst_structure_fixate_field_nearest_int(s, "width", stream_cfg.size.width);
gst_structure_fixate_field_nearest_int(s, "height", stream_cfg.size.height);
gst_structure_get_int(s, "width", &width);
gst_structure_get_int(s, "height", &height);
delta = ABS(width - (gint)stream_cfg.size.width) * ABS(height - (gint)stream_cfg.size.height);
if (delta < best_in_range_delta) {
best_in_range_delta = delta;
best_in_range = i;
}
}
}
/* Prefer reliable fixed value over ranges */
if (best_fixed >= 0)
s = gst_caps_get_structure(caps, best_fixed);
else
s = gst_caps_get_structure(caps, best_in_range);
if (gst_structure_has_name(s, "video/x-raw")) {
const gchar *format = gst_video_format_to_string(gst_format);
gst_structure_fixate_field_string(s, "format", format);
}
/* Then configure the stream with the result. */
if (gst_structure_has_name(s, "video/x-raw")) {
|