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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/extras/packed_image_convert.h"
#include <jxl/cms.h>
#include <jxl/color_encoding.h>
#include <jxl/memory_manager.h>
#include <jxl/types.h>
#include <cstdint>
#include <cstdio>
#include "lib/extras/packed_image.h"
#include "lib/jxl/base/rect.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/color_encoding_internal.h"
#include "lib/jxl/dec_external_image.h"
#include "lib/jxl/enc_external_image.h"
#include "lib/jxl/enc_image_bundle.h"
#include "lib/jxl/luminance.h"
namespace jxl {
namespace extras {
Status ConvertPackedFrameToImageBundle(const JxlBasicInfo& info,
const JxlBitDepth& input_bitdepth,
const PackedFrame& frame,
const CodecInOut& io, ThreadPool* pool,
ImageBundle* bundle) {
JxlMemoryManager* memory_manager = io.memory_manager;
JXL_ENSURE(frame.color.pixels() != nullptr);
size_t frame_bits_per_sample;
if (input_bitdepth.type == JXL_BIT_DEPTH_FROM_PIXEL_FORMAT) {
JXL_RETURN_IF_ERROR(
PackedImage::ValidateDataType(frame.color.format.data_type));
frame_bits_per_sample =
PackedImage::BitsPerChannel(frame.color.format.data_type);
} else {
frame_bits_per_sample = info.bits_per_sample;
}
JXL_ENSURE(frame_bits_per_sample != 0);
// It is ok for the frame.color.format.num_channels to not match the
// number of channels on the image.
JXL_ENSURE(1 <= frame.color.format.num_channels &&
frame.color.format.num_channels <= 4);
const Span<const uint8_t> span(
static_cast<const uint8_t*>(frame.color.pixels()),
frame.color.pixels_size);
JXL_ENSURE(Rect(frame.frame_info.layer_info.crop_x0,
frame.frame_info.layer_info.crop_y0,
frame.frame_info.layer_info.xsize,
frame.frame_info.layer_info.ysize)
.IsInside(Rect(0, 0, info.xsize, info.ysize)));
if (info.have_animation) {
bundle->duration = frame.frame_info.duration;
bundle->blend = frame.frame_info.layer_info.blend_info.blendmode > 0;
bundle->use_for_next_frame =
frame.frame_info.layer_info.save_as_reference > 0;
bundle->origin.x0 = frame.frame_info.layer_info.crop_x0;
bundle->origin.y0 = frame.frame_info.layer_info.crop_y0;
}
bundle->name = frame.name; // frame.frame_info.name_length is ignored here.
JXL_ENSURE(io.metadata.m.color_encoding.IsGray() ==
(frame.color.format.num_channels <= 2));
JXL_RETURN_IF_ERROR(ConvertFromExternal(
span, frame.color.xsize, frame.color.ysize, io.metadata.m.color_encoding,
frame_bits_per_sample, frame.color.format, pool, bundle));
bundle->extra_channels().resize(io.metadata.m.extra_channel_info.size());
for (size_t i = 0; i < frame.extra_channels.size(); i++) {
const auto& ppf_ec = frame.extra_channels[i];
JXL_ASSIGN_OR_RETURN(
bundle->extra_channels()[i],
ImageF::Create(memory_manager, ppf_ec.xsize, ppf_ec.ysize));
JXL_RETURN_IF_ERROR(BufferToImageF(
ppf_ec.format, ppf_ec.xsize, ppf_ec.ysize, ppf_ec.pixels(),
ppf_ec.pixels_size, pool, &bundle->extra_channels()[i]));
}
return true;
}
Status ConvertPackedPixelFileToCodecInOut(const PackedPixelFile& ppf,
ThreadPool* pool, CodecInOut* io) {
JxlMemoryManager* memory_manager = io->memory_manager;
const bool has_alpha = ppf.info.alpha_bits != 0;
JXL_ENSURE(!ppf.frames.empty());
if (has_alpha) {
JXL_ENSURE(ppf.info.alpha_bits == ppf.info.bits_per_sample);
JXL_ENSURE(ppf.info.alpha_exponent_bits ==
ppf.info.exponent_bits_per_sample);
}
const bool is_gray = (ppf.info.num_color_channels == 1);
JXL_ENSURE(ppf.info.num_color_channels == 1 ||
ppf.info.num_color_channels == 3);
// Convert the image metadata
JXL_RETURN_IF_ERROR(io->SetSize(ppf.info.xsize, ppf.info.ysize));
io->metadata.m.bit_depth.bits_per_sample = ppf.info.bits_per_sample;
io->metadata.m.bit_depth.exponent_bits_per_sample =
ppf.info.exponent_bits_per_sample;
io->metadata.m.bit_depth.floating_point_sample =
ppf.info.exponent_bits_per_sample != 0;
io->metadata.m.modular_16_bit_buffer_sufficient =
ppf.info.exponent_bits_per_sample == 0 && ppf.info.bits_per_sample <= 12;
io->metadata.m.SetAlphaBits(ppf.info.alpha_bits,
FROM_JXL_BOOL(ppf.info.alpha_premultiplied));
ExtraChannelInfo* alpha = io->metadata.m.Find(ExtraChannel::kAlpha);
if (alpha) alpha->bit_depth = io->metadata.m.bit_depth;
io->metadata.m.xyb_encoded = !FROM_JXL_BOOL(ppf.info.uses_original_profile);
JXL_ENSURE(ppf.info.orientation > 0 && ppf.info.orientation <= 8);
io->metadata.m.orientation = ppf.info.orientation;
// Convert animation metadata
JXL_ENSURE(ppf.frames.size() == 1 || ppf.info.have_animation);
io->metadata.m.have_animation = FROM_JXL_BOOL(ppf.info.have_animation);
io->metadata.m.animation.tps_numerator = ppf.info.animation.tps_numerator;
io->metadata.m.animation.tps_denominator = ppf.info.animation.tps_denominator;
io->metadata.m.animation.num_loops = ppf.info.animation.num_loops;
// Convert the color encoding.
if (ppf.primary_color_representation == PackedPixelFile::kIccIsPrimary) {
IccBytes icc = ppf.icc;
if (!io->metadata.m.color_encoding.SetICC(std::move(icc),
JxlGetDefaultCms())) {
fprintf(stderr, "Warning: error setting ICC profile, assuming SRGB\n");
io->metadata.m.color_encoding = ColorEncoding::SRGB(is_gray);
} else {
if (io->metadata.m.color_encoding.IsCMYK()) {
// We expect gray or tri-color.
return JXL_FAILURE("Embedded ICC is CMYK");
}
if (io->metadata.m.color_encoding.IsGray() != is_gray) {
// E.g. JPG image has 3 channels, but gray ICC.
return JXL_FAILURE("Embedded ICC does not match image color type");
}
}
} else {
JXL_RETURN_IF_ERROR(
io->metadata.m.color_encoding.FromExternal(ppf.color_encoding));
if (io->metadata.m.color_encoding.ICC().empty()) {
return JXL_FAILURE("Failed to serialize ICC");
}
}
// Convert the extra blobs
io->blobs.exif = ppf.metadata.exif;
io->blobs.iptc = ppf.metadata.iptc;
io->blobs.jhgm = ppf.metadata.jhgm;
io->blobs.jumbf = ppf.metadata.jumbf;
io->blobs.xmp = ppf.metadata.xmp;
// Append all other extra channels.
for (const auto& info : ppf.extra_channels_info) {
ExtraChannelInfo out;
out.type = static_cast<jxl::ExtraChannel>(info.ec_info.type);
out.bit_depth.bits_per_sample = info.ec_info.bits_per_sample;
out.bit_depth.exponent_bits_per_sample =
info.ec_info.exponent_bits_per_sample;
out.bit_depth.floating_point_sample =
info.ec_info.exponent_bits_per_sample != 0;
out.dim_shift = info.ec_info.dim_shift;
out.name = info.name;
out.alpha_associated = (info.ec_info.alpha_premultiplied != 0);
out.spot_color[0] = info.ec_info.spot_color[0];
out.spot_color[1] = info.ec_info.spot_color[1];
out.spot_color[2] = info.ec_info.spot_color[2];
out.spot_color[3] = info.ec_info.spot_color[3];
io->metadata.m.extra_channel_info.push_back(std::move(out));
}
// Convert the preview
if (ppf.preview_frame) {
size_t preview_xsize = ppf.preview_frame->color.xsize;
size_t preview_ysize = ppf.preview_frame->color.ysize;
io->metadata.m.have_preview = true;
JXL_RETURN_IF_ERROR(
io->metadata.m.preview_size.Set(preview_xsize, preview_ysize));
JXL_RETURN_IF_ERROR(ConvertPackedFrameToImageBundle(
ppf.info, ppf.input_bitdepth, *ppf.preview_frame, *io, pool,
&io->preview_frame));
}
// Convert the pixels
io->frames.clear();
for (const auto& frame : ppf.frames) {
ImageBundle bundle(memory_manager, &io->metadata.m);
JXL_RETURN_IF_ERROR(ConvertPackedFrameToImageBundle(
ppf.info, ppf.input_bitdepth, frame, *io, pool, &bundle));
io->frames.push_back(std::move(bundle));
}
if (ppf.info.exponent_bits_per_sample == 0) {
// uint case.
io->metadata.m.bit_depth.bits_per_sample = io->Main().DetectRealBitdepth();
}
if (ppf.info.intensity_target != 0) {
io->metadata.m.SetIntensityTarget(ppf.info.intensity_target);
} else {
SetIntensityTarget(&io->metadata.m);
}
JXL_RETURN_IF_ERROR(io->CheckMetadata());
return true;
}
StatusOr<PackedPixelFile> ConvertImage3FToPackedPixelFile(
const Image3F& image, const ColorEncoding& c_enc, JxlPixelFormat format,
ThreadPool* pool) {
PackedPixelFile ppf{};
ppf.info.xsize = image.xsize();
ppf.info.ysize = image.ysize();
ppf.info.num_color_channels = 3;
JXL_RETURN_IF_ERROR(PackedImage::ValidateDataType(format.data_type));
ppf.info.bits_per_sample = PackedImage::BitsPerChannel(format.data_type);
ppf.info.exponent_bits_per_sample = format.data_type == JXL_TYPE_FLOAT ? 8
: format.data_type == JXL_TYPE_FLOAT16
? 5
: 0;
ppf.color_encoding = c_enc.ToExternal();
ppf.frames.clear();
JXL_ASSIGN_OR_RETURN(
PackedFrame frame,
PackedFrame::Create(image.xsize(), image.ysize(), format));
const ImageF* channels[3];
for (int c = 0; c < 3; ++c) {
channels[c] = &image.Plane(c);
}
bool float_samples = ppf.info.exponent_bits_per_sample > 0;
JXL_RETURN_IF_ERROR(ConvertChannelsToExternal(
channels, 3, ppf.info.bits_per_sample, float_samples, format.endianness,
frame.color.stride, pool, frame.color.pixels(0, 0, 0),
frame.color.pixels_size, PixelCallback(), Orientation::kIdentity));
ppf.frames.emplace_back(std::move(frame));
return ppf;
}
// Allows converting from internal CodecInOut to external PackedPixelFile
Status ConvertCodecInOutToPackedPixelFile(const CodecInOut& io,
const JxlPixelFormat& pixel_format,
const ColorEncoding& c_desired,
ThreadPool* pool,
PackedPixelFile* ppf) {
JxlMemoryManager* memory_manager = io.memory_manager;
const bool has_alpha = io.metadata.m.HasAlpha();
JXL_ENSURE(!io.frames.empty());
if (has_alpha) {
JXL_ENSURE(io.metadata.m.GetAlphaBits() ==
io.metadata.m.bit_depth.bits_per_sample);
const auto* alpha_channel = io.metadata.m.Find(ExtraChannel::kAlpha);
JXL_ENSURE(alpha_channel->bit_depth.exponent_bits_per_sample ==
io.metadata.m.bit_depth.exponent_bits_per_sample);
ppf->info.alpha_bits = alpha_channel->bit_depth.bits_per_sample;
ppf->info.alpha_exponent_bits =
alpha_channel->bit_depth.exponent_bits_per_sample;
ppf->info.alpha_premultiplied =
TO_JXL_BOOL(alpha_channel->alpha_associated);
}
// Convert the image metadata
ppf->info.xsize = io.metadata.size.xsize();
ppf->info.ysize = io.metadata.size.ysize();
ppf->info.num_color_channels = io.metadata.m.color_encoding.Channels();
ppf->info.bits_per_sample = io.metadata.m.bit_depth.bits_per_sample;
ppf->info.exponent_bits_per_sample =
io.metadata.m.bit_depth.exponent_bits_per_sample;
ppf->info.intensity_target = io.metadata.m.tone_mapping.intensity_target;
ppf->info.linear_below = io.metadata.m.tone_mapping.linear_below;
ppf->info.min_nits = io.metadata.m.tone_mapping.min_nits;
ppf->info.relative_to_max_display =
TO_JXL_BOOL(io.metadata.m.tone_mapping.relative_to_max_display);
ppf->info.uses_original_profile = TO_JXL_BOOL(!io.metadata.m.xyb_encoded);
JXL_ENSURE(0 < io.metadata.m.orientation && io.metadata.m.orientation <= 8);
ppf->info.orientation =
static_cast<JxlOrientation>(io.metadata.m.orientation);
ppf->info.num_color_channels = io.metadata.m.color_encoding.Channels();
// Convert animation metadata
JXL_ENSURE(io.frames.size() == 1 || io.metadata.m.have_animation);
ppf->info.have_animation = TO_JXL_BOOL(io.metadata.m.have_animation);
ppf->info.animation.tps_numerator = io.metadata.m.animation.tps_numerator;
ppf->info.animation.tps_denominator = io.metadata.m.animation.tps_denominator;
ppf->info.animation.num_loops = io.metadata.m.animation.num_loops;
// Convert the color encoding
ppf->icc.assign(c_desired.ICC().begin(), c_desired.ICC().end());
ppf->primary_color_representation =
c_desired.WantICC() ? PackedPixelFile::kIccIsPrimary
: PackedPixelFile::kColorEncodingIsPrimary;
ppf->color_encoding = c_desired.ToExternal();
// Convert the extra blobs
ppf->metadata.exif = io.blobs.exif;
ppf->metadata.iptc = io.blobs.iptc;
ppf->metadata.jhgm = io.blobs.jhgm;
ppf->metadata.jumbf = io.blobs.jumbf;
ppf->metadata.xmp = io.blobs.xmp;
const bool float_out = pixel_format.data_type == JXL_TYPE_FLOAT ||
pixel_format.data_type == JXL_TYPE_FLOAT16;
// Convert the pixels
ppf->frames.clear();
for (const auto& frame : io.frames) {
JXL_ENSURE(frame.metadata()->bit_depth.bits_per_sample != 0);
// It is ok for the frame.color().kNumPlanes to not match the
// number of channels on the image.
const uint32_t alpha_channels = has_alpha ? 1 : 0;
const uint32_t num_channels =
frame.metadata()->color_encoding.Channels() + alpha_channels;
JxlPixelFormat format{/*num_channels=*/num_channels,
/*data_type=*/pixel_format.data_type,
/*endianness=*/pixel_format.endianness,
/*align=*/pixel_format.align};
JXL_ASSIGN_OR_RETURN(PackedFrame packed_frame,
PackedFrame::Create(frame.oriented_xsize(),
frame.oriented_ysize(), format));
JXL_RETURN_IF_ERROR(PackedImage::ValidateDataType(pixel_format.data_type));
const size_t bits_per_sample =
float_out ? packed_frame.color.BitsPerChannel(pixel_format.data_type)
: ppf->info.bits_per_sample;
packed_frame.name = frame.name;
packed_frame.frame_info.name_length = frame.name.size();
// Color transform
JXL_ASSIGN_OR_RETURN(ImageBundle ib, frame.Copy());
const ImageBundle* to_color_transform = &ib;
ImageMetadata metadata = io.metadata.m;
ImageBundle store(memory_manager, &metadata);
const ImageBundle* transformed;
// TODO(firsching): handle the transform here.
JXL_RETURN_IF_ERROR(TransformIfNeeded(*to_color_transform, c_desired,
*JxlGetDefaultCms(), pool, &store,
&transformed));
JXL_RETURN_IF_ERROR(ConvertToExternal(
*transformed, bits_per_sample, float_out, format.num_channels,
format.endianness,
/* stride_out=*/packed_frame.color.stride, pool,
packed_frame.color.pixels(), packed_frame.color.pixels_size,
/*out_callback=*/{}, frame.metadata()->GetOrientation()));
// TODO(firsching): Convert the extra channels, beside one potential alpha
// channel. FIXME!
JXL_ENSURE(frame.extra_channels().size() <= (has_alpha ? 1 : 0));
ppf->frames.push_back(std::move(packed_frame));
}
return true;
}
} // namespace extras
} // namespace jxl