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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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237 lines
11 KiB
C++
237 lines
11 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "decodersrv_software_jpeg_shrinker.hpp"
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#include "capsrv_server_jpeg_library_types.hpp"
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#include "capsrv_server_jpeg_error_handler.hpp"
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namespace ams::capsrv::server::jpeg {
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#define CAPSRV_ABORT_UNLESS(expr) do { \
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const bool __capsrv_assert_res = (expr); \
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AMS_ASSERT(__capsrv_assert_res); \
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AMS_ABORT_UNLESS(__capsrv_assert_res); \
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} while (0)
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#define CAPSRV_ASSERT(expr) do { \
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const bool __capsrv_assert_res = (expr); \
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AMS_ASSERT(__capsrv_assert_res); \
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R_UNLESS(__capsrv_assert_res, capsrv::ResultAlbumError()); \
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} while (0)
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namespace {
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constexpr s32 ImageSizeHorizonalUnit = 0x10;
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constexpr s32 ImageSizeVerticalUnitDecode = 0x4;
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constexpr s32 ImageSizeVerticalUnitEncode = 0x8;
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constexpr s32 RgbColorComponentCount = 3;
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constexpr s32 RgbaColorComponentCount = 4;
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Result GetRgbBufferSize(size_t *out_size, size_t *out_stride, s32 width, size_t work_size) {
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/* Calculate the space we need and verify we have enough. */
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const size_t rgb_width = util::AlignUp(static_cast<size_t>(width), ImageSizeHorizonalUnit);
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const size_t rgb_stride = rgb_width * RgbColorComponentCount;
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const size_t rgb_size = rgb_stride * ImageSizeVerticalUnitEncode;
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R_UNLESS(work_size >= rgb_size, capsrv::ResultInternalJpegWorkMemoryShortage());
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/* Return the output to the caller. */
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*out_size = rgb_size;
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*out_stride = rgb_stride;
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R_SUCCEED();
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}
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void SetupEncodingParameter(JpegLibraryType::jpeg_compress_struct *cinfo, const SoftwareJpegShrinkerInput &input, int quality) {
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/* Set parameters. */
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cinfo->image_width = static_cast<JpegLibraryType::JDIMENSION>(input.width / 2);
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cinfo->image_height = static_cast<JpegLibraryType::JDIMENSION>(input.height / 2);
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cinfo->input_components = RgbColorComponentCount;
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cinfo->in_color_space = JpegLibraryType::J_COLOR_SPACE::JCS_RGB;
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/* Set defaults/color space. */
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jpeg_set_defaults(cinfo);
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jpeg_set_colorspace(cinfo, JpegLibraryType::J_COLOR_SPACE::JCS_YCbCr);
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/* Configure sampling. */
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/* libjpeg-turbo doesn't actually have this field, as of now. */
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/* cinfo->do_fancy_downsampling = false; */
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cinfo->comp_info[0].h_samp_factor = 2;
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cinfo->comp_info[0].v_samp_factor = 1;
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cinfo->comp_info[1].h_samp_factor = 1;
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cinfo->comp_info[1].v_samp_factor = 1;
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cinfo->comp_info[2].h_samp_factor = 1;
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cinfo->comp_info[2].v_samp_factor = 1;
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/* Set the quality. */
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jpeg_set_quality(cinfo, quality, true);
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/* Configure remaining parameters. */
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cinfo->dct_method = JpegLibraryType::J_DCT_METHOD::JDCT_ISLOW;
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cinfo->optimize_coding = false;
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cinfo->write_JFIF_header = true;
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}
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}
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Result SoftwareJpegShrinker::ShrinkRgba8(SoftwareJpegShrinkerOutput &output, const SoftwareJpegShrinkerInput &input, int quality, void *work, size_t work_size) {
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CAPSRV_ABORT_UNLESS(util::IsAligned(input.width, ImageSizeHorizonalUnit));
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CAPSRV_ABORT_UNLESS(util::IsAligned(input.height, ImageSizeVerticalUnitDecode));
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const u32 shrunk_width = input.width / 2;
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const u32 shrunk_height = input.height / 2;
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CAPSRV_ABORT_UNLESS(util::IsAligned(shrunk_width, ImageSizeHorizonalUnit));
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CAPSRV_ABORT_UNLESS(output.dst != nullptr);
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CAPSRV_ABORT_UNLESS(output.out_width != nullptr);
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CAPSRV_ABORT_UNLESS(output.out_height != nullptr);
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/* Determine work buffer extents. */
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char *work_start = static_cast<char *>(work);
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char *work_end = work_start + work_size;
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/* Determine the buffer extents for our linebuffers. */
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u8 *rgb_buffer = static_cast<u8 *>(static_cast<void *>(work_start));
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size_t rgb_buffer_size;
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size_t rgb_buffer_stride;
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R_TRY(GetRgbBufferSize(std::addressof(rgb_buffer_size), std::addressof(rgb_buffer_stride), input.width, work_size));
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/* The start of the workbuffer is reserved for linebuffer space. */
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work_start += rgb_buffer_size;
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/* Create our compression structures. */
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JpegLibraryType::jpeg_decompress_struct dcinfo = {};
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JpegLibraryType::jpeg_compress_struct ecinfo = {};
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/* Here nintendo creates a work buffer structure containing work_start + work_size. */
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/* This seems to be a custom patch for/to libjpeg-turbo. */
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/* It would be desirable for us to mimic this, because it gives Nintendo strong */
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/* fixed memory usage guarantees. */
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/* TODO: Determine if it is feasible for us to recreate this ourselves, */
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/* Either by adding support to the devkitPro libjpeg-turbo portlib or otherwise. */
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AMS_UNUSED(work_end);
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/* Create our error managers. */
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JpegErrorHandler jerr_dc = { .result = ResultSuccess(), };
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JpegErrorHandler jerr_ec = { .result = ResultSuccess(), };
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jerr_dc.error_exit = JpegErrorHandler::HandleError,
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jerr_ec.error_exit = JpegErrorHandler::HandleError,
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/* Link our error managers to our compression structures. */
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dcinfo.err = jpeg_std_error(std::addressof(jerr_dc));
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ecinfo.err = jpeg_std_error(std::addressof(jerr_ec));
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/* Use setjmp, so that on error our handler will longjmp to return an error result. */
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if (setjmp(jerr_ec.jmp_buf) == 0) {
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if (setjmp(jerr_dc.jmp_buf) == 0) {
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/* Create our decompressor. */
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jpeg_create_decompress(std::addressof(dcinfo));
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ON_SCOPE_EXIT { jpeg_destroy_decompress(std::addressof(dcinfo)); };
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/* Setup our memory reader, ensure the header is correct. */
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jpeg_mem_src(std::addressof(dcinfo), const_cast<unsigned char *>(static_cast<const unsigned char *>(input.jpeg)), input.jpeg_size);
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R_UNLESS(jpeg_read_header(std::addressof(dcinfo), true) == JPEG_HEADER_OK, capsrv::ResultAlbumInvalidFileData());
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/* Ensure width and height are correct. */
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R_UNLESS(dcinfo.image_width == input.width, capsrv::ResultAlbumInvalidFileData());
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R_UNLESS(dcinfo.image_height == input.height, capsrv::ResultAlbumInvalidFileData());
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/* Set output parameters. */
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dcinfo.out_color_space = JpegLibraryType::J_COLOR_SPACE::JCS_RGB;
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dcinfo.dct_method = JpegLibraryType::J_DCT_METHOD::JDCT_ISLOW;
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dcinfo.do_fancy_upsampling = input.fancy_upsampling;
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dcinfo.do_block_smoothing = input.block_smoothing;
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dcinfo.scale_num = 1;
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dcinfo.scale_denom = 2;
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/* Start decompression. */
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R_UNLESS(jpeg_start_decompress(std::addressof(dcinfo)) == TRUE, capsrv::ResultAlbumInvalidFileData());
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/* Check the parameters. */
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CAPSRV_ASSERT(dcinfo.output_width == shrunk_width);
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CAPSRV_ASSERT(dcinfo.output_height == shrunk_height);
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CAPSRV_ASSERT(dcinfo.out_color_components == RgbColorComponentCount);
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CAPSRV_ASSERT(dcinfo.output_components == RgbColorComponentCount);
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/* Create our compressor. */
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jpeg_create_compress(std::addressof(ecinfo));
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ON_SCOPE_EXIT { jpeg_destroy_compress(std::addressof(ecinfo)); };
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/* Setup our memory writer. */
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unsigned long out_size = static_cast<unsigned long>(output.dst_size);
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jpeg_mem_dest(std::addressof(ecinfo), reinterpret_cast<unsigned char **>(std::addressof(output.dst)), std::addressof(out_size));
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/* Setup the encoding parameters. */
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SetupEncodingParameter(std::addressof(ecinfo), input, quality);
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/* Start compression. */
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jpeg_start_compress(std::addressof(ecinfo), true);
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/* Parse the scanlines. */
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{
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/* Create our linebuffer structure. */
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JpegLibraryType::JSAMPROW linebuffers[ImageSizeVerticalUnitEncode] = {};
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for (int i = 0; i < ImageSizeVerticalUnitEncode; i++) {
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linebuffers[i] = rgb_buffer + rgb_buffer_stride * i;
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}
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/* While we still have scanlines, parse! */
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while (dcinfo.output_scanline < shrunk_height) {
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/* Determine remaining scanlines. */
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const auto remaining_scanlines = shrunk_height - dcinfo.output_scanline;
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const auto cur_max_scanlines = std::min<s32>(remaining_scanlines, ImageSizeVerticalUnitEncode);
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/* If we have scanlines to decode, try to do so. */
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auto writable_scanlines = 0;
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while (writable_scanlines < cur_max_scanlines) {
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const auto decoded = jpeg_read_scanlines(std::addressof(dcinfo), linebuffers + writable_scanlines, ImageSizeVerticalUnitDecode);
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CAPSRV_ASSERT(decoded <= ImageSizeVerticalUnitDecode / 2);
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writable_scanlines += decoded;
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}
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/* If we have scanlines to write, try to do so. */
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jpeg_write_scanlines(std::addressof(ecinfo), linebuffers, writable_scanlines);
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}
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}
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/* Finish the decompression. */
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R_UNLESS(jpeg_finish_decompress(std::addressof(dcinfo)) == TRUE, capsrv::ResultAlbumInvalidFileData());
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/* Finish the compression. */
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jpeg_finish_compress(std::addressof(ecinfo));
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/* Set the output size. */
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*output.out_size = out_size;
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} else {
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/* Some unknown error was caught by our handler. */
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R_THROW(capsrv::ResultAlbumInvalidFileData());
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}
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} else {
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/* Return the encoding result. */
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R_THROW(jerr_ec.result);
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}
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/* Write the size we decoded to output. */
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*output.out_width = static_cast<s32>(dcinfo.output_width);
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*output.out_width = static_cast<s32>(dcinfo.output_height);
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R_SUCCEED();
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}
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}
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