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/*
Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "colour_conversion.h"
#include "cuda_j2k_encoder_thread.h"
#include "dcp_video.h"
#include "exceptions.h"
#include "resolution.h"
#include <nvjpeg2k.h>
using std::shared_ptr;
CUDAJ2KEncoderThread::CUDAJ2KEncoderThread(J2KEncoder& encoder)
: J2KSyncEncoderThread(encoder)
{
nvjpeg2kEncoderCreateSimple(&_encoder_handle);
nvjpeg2kEncodeStateCreate(_encoder_handle, &_encode_state);
nvjpeg2kEncodeParamsCreate(&_encode_params);
nvjpeg2kEncodeParamsSetInputFormat(_encode_params, NVJPEG2K_FORMAT_PLANAR);
cudaStreamCreateWithFlags(&_stream, cudaStreamNonBlocking);
}
shared_ptr<dcp::ArrayData>
CUDAJ2KEncoderThread::encode(DCPVideo const& frame)
{
std::cout << "CUDA: encode " << frame.index() << "\n";
auto xyz = convert_to_xyz(frame.frame());
auto const size = xyz->size();
std::cout << "freeowwwwm\n";
/* {x,y,z}lp is 4-byte int representation */
int* xlp = xyz->data(0);
int* ylp = xyz->data(1);
int* zlp = xyz->data(2);
uint8_t* pixel_data_h[3];
/* {x,y,z}p is 2-byte int representation */
_xyz_x.resize(size.width * size.height);
int16_t* xp = _xyz_x.data();
pixel_data_h[0] = reinterpret_cast<uint8_t*>(xp);
_xyz_y.resize(size.width * size.height);
int16_t* yp = _xyz_y.data();
pixel_data_h[1] = reinterpret_cast<uint8_t*>(yp);
_xyz_z.resize(size.width * size.height);
int16_t* zp = _xyz_z.data();
pixel_data_h[2] = reinterpret_cast<uint8_t*>(zp);
std::cout << "felcher\n";
for (int j = 0; j < size.width * size.height; ++j) {
*xp++ = static_cast<int16_t>(*xlp++);
*yp++ = static_cast<int16_t>(*ylp++);
*zp++ = static_cast<int16_t>(*zlp++);
}
std::cout << "big bag o bollox";
allocate_pixel_data_d(size);
std::cout << "copying to device.\n";
/* Copy to device */
size_t pitch_in_bytes_h[3];
for (int i = 0; i < 3; ++i) {
pitch_in_bytes_h[i] = size.width * 2;
auto const status = cudaMemcpy2D(
_pixel_data_d[i],
_pitch_in_bytes_d[i],
pixel_data_h[i],
pitch_in_bytes_h[i],
size.width * 2,
size.height,
cudaMemcpyHostToDevice
);
if (status != cudaSuccess) {
throw CUDAError("cudaMemcpy2D", status);
}
}
std::cout << "copied to device.\n";
nvjpeg2kImage_t device_image;
device_image.num_components = 3;
device_image.pixel_data = reinterpret_cast<void**>(_pixel_data_d);
device_image.pixel_type = NVJPEG2K_INT16;
device_image.pitch_in_bytes = reinterpret_cast<size_t*>(_pitch_in_bytes_d);
nvjpeg2kImageComponentInfo_t info[3];
for (int i = 0; i < 3; ++i) {
info[i].component_width = size.width;
info[i].component_height = size.height;
info[i].precision = 12;
info[i].sgn = 0;
}
nvjpeg2kEncodeConfig_t config;
memset(&config, 0, sizeof(config));
config.stream_type = NVJPEG2K_STREAM_J2K;
config.color_space = NVJPEG2K_COLORSPACE_SRGB;
config.image_width = size.width;
config.image_height = size.height;
config.num_components = 3;
config.image_comp_info = reinterpret_cast<nvjpeg2kImageComponentInfo_t*>(&info);
config.code_block_w = 32;
config.code_block_h = 32;
config.irreversible = 0;
config.mct_mode = 1;
config.prog_order = NVJPEG2K_CPRL;
config.num_resolutions = frame.resolution() == Resolution::FOUR_K ? 7 : 6;
config.num_precincts_init = 7;
config.precinct_width[0] = 7;
config.precinct_height[0] = 7;
for (int i = 1; i < 6; ++i) {
config.precinct_width[i] = 8;
config.precinct_height[i] = 8;
}
auto status = nvjpeg2kEncodeParamsSetEncodeConfig(_encode_params, &config);
if (status != NVJPEG2K_STATUS_SUCCESS) {
throw CUDAError("nvjpeg2kEncodeParamsSetEncodeConfig", status);
}
// XXX: quality
status = nvjpeg2kEncodeParamsSetQuality(_encode_params, 50);
if (status != NVJPEG2K_STATUS_SUCCESS) {
throw CUDAError("nvjpeg2kEncodeParamsSetQuality", status);
}
std::cout << "calling nvjpeg2kEncode\n";
status = nvjpeg2kEncode(_encoder_handle, _encode_state, _encode_params, &device_image, _stream);
if (status != NVJPEG2K_STATUS_SUCCESS) {
throw CUDAError("nvjpeg2kEncode", status);
}
size_t compressed_size;
status = nvjpeg2kEncodeRetrieveBitstream(_encoder_handle, _encode_state, nullptr, &compressed_size, _stream);
auto output = std::make_shared<dcp::ArrayData>(compressed_size);
status = nvjpeg2kEncodeRetrieveBitstream(_encoder_handle, _encode_state, output->data(), &compressed_size, _stream);
if (status != NVJPEG2K_STATUS_SUCCESS) {
throw CUDAError("nvjpeg2kEncodeRetrieveBitstream", status);
}
return output;
}
void
CUDAJ2KEncoderThread::allocate_pixel_data_d(dcp::Size size)
{
if (size == _pixel_data_d_size) {
return;
}
free_pixel_data_d();
for (int i = 0; i < 3; ++i) {
auto status = cudaMallocPitch(
reinterpret_cast<void**>(&_pixel_data_d[i]),
&_pitch_in_bytes_d[i],
size.width * 2,
size.height
);
if (status != cudaSuccess) {
std::cout << "bad news brown: " << status << "\n";
throw CUDAError("cudaMallocPitch", status);
}
}
_pixel_data_d_size = size;
}
void
CUDAJ2KEncoderThread::free_pixel_data_d()
{
for (int i = 0; i < 3; ++i) {
cudaFree(_pixel_data_d[i]);
}
}
CUDAJ2KEncoderThread::~CUDAJ2KEncoderThread()
{
free_pixel_data_d();
nvjpeg2kEncodeParamsDestroy(_encode_params);
nvjpeg2kEncodeStateDestroy(_encode_state);
nvjpeg2kEncoderDestroy(_encoder_handle);
}
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