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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "lib/jxl/dec_cache.h"
#include "lib/jxl/blending.h"
#include "lib/jxl/render_pipeline/stage_blending.h"
#include "lib/jxl/render_pipeline/stage_chroma_upsampling.h"
#include "lib/jxl/render_pipeline/stage_epf.h"
#include "lib/jxl/render_pipeline/stage_from_linear.h"
#include "lib/jxl/render_pipeline/stage_gaborish.h"
#include "lib/jxl/render_pipeline/stage_noise.h"
#include "lib/jxl/render_pipeline/stage_patches.h"
#include "lib/jxl/render_pipeline/stage_splines.h"
#include "lib/jxl/render_pipeline/stage_spot.h"
#include "lib/jxl/render_pipeline/stage_to_linear.h"
#include "lib/jxl/render_pipeline/stage_tone_mapping.h"
#include "lib/jxl/render_pipeline/stage_upsampling.h"
#include "lib/jxl/render_pipeline/stage_write.h"
#include "lib/jxl/render_pipeline/stage_xyb.h"
#include "lib/jxl/render_pipeline/stage_ycbcr.h"
namespace jxl {
Status PassesDecoderState::PreparePipeline(ImageBundle* decoded,
PipelineOptions options) {
const FrameHeader& frame_header = shared->frame_header;
size_t num_c = 3 + frame_header.nonserialized_metadata->m.num_extra_channels;
if ((frame_header.flags & FrameHeader::kNoise) != 0) {
num_c += 3;
}
if (frame_header.CanBeReferenced()) {
// Necessary so that SetInputSizes() can allocate output buffers as needed.
frame_storage_for_referencing = ImageBundle(decoded->metadata());
}
RenderPipeline::Builder builder(num_c);
if (options.use_slow_render_pipeline) {
builder.UseSimpleImplementation();
}
if (!frame_header.chroma_subsampling.Is444()) {
for (size_t c = 0; c < 3; c++) {
if (frame_header.chroma_subsampling.HShift(c) != 0) {
builder.AddStage(GetChromaUpsamplingStage(c, /*horizontal=*/true));
}
if (frame_header.chroma_subsampling.VShift(c) != 0) {
builder.AddStage(GetChromaUpsamplingStage(c, /*horizontal=*/false));
}
}
}
if (frame_header.loop_filter.gab) {
builder.AddStage(GetGaborishStage(frame_header.loop_filter));
}
{
const LoopFilter& lf = frame_header.loop_filter;
if (lf.epf_iters >= 3) {
builder.AddStage(GetEPFStage(lf, sigma, 0));
}
if (lf.epf_iters >= 1) {
builder.AddStage(GetEPFStage(lf, sigma, 1));
}
if (lf.epf_iters >= 2) {
builder.AddStage(GetEPFStage(lf, sigma, 2));
}
}
bool late_ec_upsample = frame_header.upsampling != 1;
for (auto ecups : frame_header.extra_channel_upsampling) {
if (ecups != frame_header.upsampling) {
// If patches are applied, either frame_header.upsampling == 1 or
// late_ec_upsample is true.
late_ec_upsample = false;
}
}
if (!late_ec_upsample) {
for (size_t ec = 0; ec < frame_header.extra_channel_upsampling.size();
ec++) {
if (frame_header.extra_channel_upsampling[ec] != 1) {
builder.AddStage(GetUpsamplingStage(
frame_header.nonserialized_metadata->transform_data, 3 + ec,
CeilLog2Nonzero(frame_header.extra_channel_upsampling[ec])));
}
}
}
if ((frame_header.flags & FrameHeader::kPatches) != 0) {
builder.AddStage(
GetPatchesStage(&shared->image_features.patches,
3 + shared->metadata->m.num_extra_channels));
}
if ((frame_header.flags & FrameHeader::kSplines) != 0) {
builder.AddStage(GetSplineStage(&shared->image_features.splines));
}
if (frame_header.upsampling != 1) {
size_t nb_channels =
3 +
(late_ec_upsample ? frame_header.extra_channel_upsampling.size() : 0);
for (size_t c = 0; c < nb_channels; c++) {
builder.AddStage(GetUpsamplingStage(
frame_header.nonserialized_metadata->transform_data, c,
CeilLog2Nonzero(frame_header.upsampling)));
}
}
if ((frame_header.flags & FrameHeader::kNoise) != 0) {
builder.AddStage(GetConvolveNoiseStage(num_c - 3));
builder.AddStage(GetAddNoiseStage(shared->image_features.noise_params,
shared->cmap, num_c - 3));
}
if (frame_header.dc_level != 0) {
builder.AddStage(GetWriteToImage3FStage(
&shared_storage.dc_frames[frame_header.dc_level - 1]));
}
if (frame_header.CanBeReferenced() &&
frame_header.save_before_color_transform) {
builder.AddStage(GetWriteToImageBundleStage(
&frame_storage_for_referencing, output_encoding_info.color_encoding));
}
bool has_alpha = false;
size_t alpha_c = 0;
for (size_t i = 0; i < decoded->metadata()->extra_channel_info.size(); i++) {
if (decoded->metadata()->extra_channel_info[i].type ==
ExtraChannel::kAlpha) {
has_alpha = true;
alpha_c = 3 + i;
break;
}
}
if (fast_xyb_srgb8_conversion) {
JXL_ASSERT(!NeedsBlending(this));
JXL_ASSERT(!frame_header.CanBeReferenced() ||
frame_header.save_before_color_transform);
JXL_ASSERT(!options.render_spotcolors ||
!decoded->metadata()->Find(ExtraChannel::kSpotColor));
bool is_rgba = (main_output.format.num_channels == 4);
uint8_t* rgb_output = reinterpret_cast<uint8_t*>(main_output.buffer);
builder.AddStage(GetFastXYBTosRGB8Stage(rgb_output, main_output.stride,
width, height, is_rgba, has_alpha,
alpha_c));
} else {
bool linear = false;
if (frame_header.color_transform == ColorTransform::kYCbCr) {
builder.AddStage(GetYCbCrStage());
} else if (frame_header.color_transform == ColorTransform::kXYB) {
builder.AddStage(GetXYBStage(output_encoding_info));
if (output_encoding_info.color_encoding.GetColorSpace() !=
ColorSpace::kXYB) {
linear = true;
}
} // Nothing to do for kNone.
if (options.coalescing && NeedsBlending(this)) {
if (linear) {
builder.AddStage(GetFromLinearStage(output_encoding_info));
linear = false;
}
builder.AddStage(
GetBlendingStage(this, output_encoding_info.color_encoding));
}
if (options.coalescing && frame_header.CanBeReferenced() &&
!frame_header.save_before_color_transform) {
if (linear) {
builder.AddStage(GetFromLinearStage(output_encoding_info));
linear = false;
}
builder.AddStage(GetWriteToImageBundleStage(
&frame_storage_for_referencing, output_encoding_info.color_encoding));
}
if (options.render_spotcolors &&
frame_header.nonserialized_metadata->m.Find(ExtraChannel::kSpotColor)) {
for (size_t i = 0; i < decoded->metadata()->extra_channel_info.size();
i++) {
// Don't use Find() because there may be multiple spot color channels.
const ExtraChannelInfo& eci =
decoded->metadata()->extra_channel_info[i];
if (eci.type == ExtraChannel::kSpotColor) {
builder.AddStage(GetSpotColorStage(3 + i, eci.spot_color));
}
}
}
auto tone_mapping_stage = GetToneMappingStage(output_encoding_info);
if (tone_mapping_stage) {
if (!linear) {
auto to_linear_stage = GetToLinearStage(output_encoding_info);
if (!to_linear_stage) {
return JXL_FAILURE(
"attempting to perform tone mapping on colorspace not "
"convertible to linear");
}
builder.AddStage(std::move(to_linear_stage));
linear = true;
}
builder.AddStage(std::move(tone_mapping_stage));
}
if (linear) {
builder.AddStage(GetFromLinearStage(output_encoding_info));
linear = false;
}
if (main_output.callback.IsPresent() || main_output.buffer) {
builder.AddStage(GetWriteToOutputStage(main_output, width, height,
has_alpha, unpremul_alpha, alpha_c,
undo_orientation, extra_output));
} else {
builder.AddStage(GetWriteToImageBundleStage(
decoded, output_encoding_info.color_encoding));
}
}
render_pipeline = std::move(builder).Finalize(shared->frame_dim);
return render_pipeline->IsInitialized();
}
} // namespace jxl
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