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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#ifndef __DENOISING_H__
#define __DENOISING_H__
/* TODO(sergey): Make it explicit and clear when something is a denoiser, its pipeline or
* parameters. Currently it is an annoying mixture of terms used interchangeably. */
#include "device/device.h"
#include "integrator/denoiser.h"
#include "util/string.h"
#include "util/unique_ptr.h"
#include "util/vector.h"
#include <OpenImageIO/imageio.h>
OIIO_NAMESPACE_USING
CCL_NAMESPACE_BEGIN
/* Denoiser pipeline */
class DenoiserPipeline {
public:
DenoiserPipeline(DeviceInfo &device_info, const DenoiseParams ¶ms);
~DenoiserPipeline();
bool run();
/* Error message after running, in case of failure. */
string error;
/* Sequential list of frame filepaths to denoise. */
vector<string> input;
/* Sequential list of frame filepaths to write result to. Empty entries
* are skipped, so only a subset of the sequence can be denoised while
* taking into account all input frames. */
vector<string> output;
protected:
friend class DenoiseTask;
Stats stats;
Profiler profiler;
Device *device;
std::unique_ptr<Denoiser> denoiser;
};
/* Denoise Image Layer */
struct DenoiseImageLayer {
string name;
/* All channels belonging to this DenoiseImageLayer. */
vector<string> channels;
/* Layer to image channel mapping. */
vector<int> layer_to_image_channel;
/* Sample amount that was used for rendering this layer. */
int samples;
/* Device input channel will be copied from image channel input_to_image_channel[i]. */
vector<int> input_to_image_channel;
/* Write i-th channel of the processing output to output_to_image_channel[i]-th channel of the
* file. */
vector<int> output_to_image_channel;
/* output_to_image_channel of the previous frame, if used. */
vector<int> previous_output_to_image_channel;
/* Detect whether this layer contains a full set of channels and set up the offsets accordingly.
*/
bool detect_denoising_channels();
/* Map the channels of a secondary frame to the channels that are required for processing,
* fill neighbor_input_to_image_channel if all are present or return false if a channel are
* missing. */
bool match_channels(const std::vector<string> &channelnames,
const std::vector<string> &neighbor_channelnames);
};
/* Denoise Image Data */
class DenoiseImage {
public:
DenoiseImage();
~DenoiseImage();
/* Dimensions */
int width, height, num_channels;
/* Samples */
int samples;
/* Pixel buffer with interleaved channels. */
array<float> pixels;
/* Image file handles */
ImageSpec in_spec;
unique_ptr<ImageInput> in_previous;
/* Render layers */
vector<DenoiseImageLayer> layers;
void free();
/* Open the input image, parse its channels, open the output image and allocate the output
* buffer. */
bool load(const string &in_filepath, string &error);
/* Load neighboring frames. */
bool load_previous(const string &in_filepath, string &error);
/* Load subset of pixels from file buffer into input buffer, as needed for denoising
* on the device. Channels are reshuffled following the provided mapping. */
void read_pixels(const DenoiseImageLayer &layer,
const BufferParams ¶ms,
float *input_pixels);
bool read_previous_pixels(const DenoiseImageLayer &layer,
const BufferParams ¶ms,
float *input_pixels);
bool save_output(const string &out_filepath, string &error);
protected:
/* Parse input file channels, separate them into DenoiseImageLayers,
* detect DenoiseImageLayers with full channel sets,
* fill layers and set up the output channels and passthrough map. */
bool parse_channels(const ImageSpec &in_spec, string &error);
void close_input();
};
/* Denoise Task */
class DenoiseTask {
public:
DenoiseTask(Device *device, DenoiserPipeline *denoiser, int frame);
~DenoiseTask();
/* Task stages */
bool load();
bool exec();
bool save();
void free();
string error;
protected:
/* Denoiser parameters and device */
DenoiserPipeline *denoiser;
Device *device;
/* Frame number to be denoised */
int frame;
/* Image file data */
DenoiseImage image;
int current_layer;
RenderBuffers buffers;
/* Task handling */
bool load_input_pixels(int layer);
};
CCL_NAMESPACE_END
#endif /* __DENOISING_H__ */
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