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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/passes_state.h"
#include "lib/jxl/chroma_from_luma.h"
#include "lib/jxl/coeff_order.h"
#include "lib/jxl/common.h"
namespace jxl {
Status InitializePassesSharedState(const FrameHeader& frame_header,
PassesSharedState* JXL_RESTRICT shared,
bool encoder) {
JXL_ASSERT(frame_header.nonserialized_metadata != nullptr);
shared->frame_header = frame_header;
shared->metadata = frame_header.nonserialized_metadata;
shared->frame_dim = frame_header.ToFrameDimensions();
shared->image_features.patches.SetPassesSharedState(shared);
const FrameDimensions& frame_dim = shared->frame_dim;
shared->ac_strategy =
AcStrategyImage(frame_dim.xsize_blocks, frame_dim.ysize_blocks);
shared->raw_quant_field =
ImageI(frame_dim.xsize_blocks, frame_dim.ysize_blocks);
shared->epf_sharpness =
ImageB(frame_dim.xsize_blocks, frame_dim.ysize_blocks);
shared->cmap = ColorCorrelationMap(frame_dim.xsize, frame_dim.ysize);
// In the decoder, we allocate coeff orders afterwards, when we know how many
// we will actually need.
shared->coeff_order_size = kCoeffOrderMaxSize;
if (encoder &&
shared->coeff_orders.size() <
frame_header.passes.num_passes * kCoeffOrderMaxSize &&
frame_header.encoding == FrameEncoding::kVarDCT) {
shared->coeff_orders.resize(frame_header.passes.num_passes *
kCoeffOrderMaxSize);
}
shared->quant_dc = ImageB(frame_dim.xsize_blocks, frame_dim.ysize_blocks);
bool use_dc_frame = !!(frame_header.flags & FrameHeader::kUseDcFrame);
if (!encoder && use_dc_frame) {
if (frame_header.dc_level == 4) {
return JXL_FAILURE("Invalid DC level for kUseDcFrame: %u",
frame_header.dc_level);
}
shared->dc_storage = Image3F();
shared->dc = &shared->dc_frames[frame_header.dc_level];
if (shared->dc->xsize() == 0) {
return JXL_FAILURE(
"kUseDcFrame specified for dc_level %u, but no frame was decoded "
"with level %u",
frame_header.dc_level, frame_header.dc_level + 1);
}
ZeroFillImage(&shared->quant_dc);
} else {
shared->dc_storage =
Image3F(frame_dim.xsize_blocks, frame_dim.ysize_blocks);
shared->dc = &shared->dc_storage;
}
return true;
}
} // namespace jxl
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