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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| /* | ||
| * HEIF codec. | ||
| * Copyright (c) 2024 Dirk Farin <[email protected]> | ||
| * | ||
| * This file is part of libheif. | ||
| * | ||
| * libheif is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as | ||
| * published by the Free Software Foundation, either version 3 of | ||
| * the License, or (at your option) any later version. | ||
| * | ||
| * libheif 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 Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with libheif. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| #include "codecs/uncompressed/unc_dec.h" | ||
| #include "codecs/uncompressed/unc_image.h" | ||
| #include "error.h" | ||
| #include "context.h" | ||
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| #include <string> | ||
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| Result<std::vector<uint8_t>> Decoder_uncompressed::read_bitstream_configuration_data() const | ||
| { | ||
| return std::vector<uint8_t>{}; | ||
| } | ||
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| int Decoder_uncompressed::get_luma_bits_per_pixel() const | ||
| { | ||
| assert(m_uncC); | ||
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| if (!m_cmpd) { | ||
| if (isKnownUncompressedFrameConfigurationBoxProfile(m_uncC)) { | ||
| return 8; | ||
| } | ||
| else { | ||
| return -1; | ||
| } | ||
| } | ||
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| int luma_bits = 0; | ||
| int alternate_channel_bits = 0; | ||
| for (Box_uncC::Component component : m_uncC->get_components()) { | ||
| uint16_t component_index = component.component_index; | ||
| if (component_index >= m_cmpd->get_components().size()) { | ||
| return -1; | ||
| } | ||
| auto component_type = m_cmpd->get_components()[component_index].component_type; | ||
| switch (component_type) { | ||
| case component_type_monochrome: | ||
| case component_type_red: | ||
| case component_type_green: | ||
| case component_type_blue: | ||
| alternate_channel_bits = std::max(alternate_channel_bits, (int) component.component_bit_depth); | ||
| break; | ||
| case component_type_Y: | ||
| luma_bits = std::max(luma_bits, (int) component.component_bit_depth); | ||
| break; | ||
| // TODO: there are other things we'll need to handle eventually, like palette. | ||
| } | ||
| } | ||
| if (luma_bits > 0) { | ||
| return luma_bits; | ||
| } | ||
| else if (alternate_channel_bits > 0) { | ||
| return alternate_channel_bits; | ||
| } | ||
| else { | ||
| return 8; | ||
| } | ||
| } | ||
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| int Decoder_uncompressed::get_chroma_bits_per_pixel() const | ||
| { | ||
| if (m_uncC && m_uncC->get_version() == 1) { | ||
| // All of the version 1 cases are 8 bit | ||
| return 8; | ||
| } | ||
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| if (!m_uncC || !m_cmpd) { | ||
| return -1; | ||
| } | ||
|
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| int chroma_bits = 0; | ||
| int alternate_channel_bits = 0; | ||
| for (Box_uncC::Component component : m_uncC->get_components()) { | ||
| uint16_t component_index = component.component_index; | ||
| if (component_index >= m_cmpd->get_components().size()) { | ||
| return -1; | ||
| } | ||
| auto component_type = m_cmpd->get_components()[component_index].component_type; | ||
| switch (component_type) { | ||
| case component_type_monochrome: | ||
| case component_type_red: | ||
| case component_type_green: | ||
| case component_type_blue: | ||
| alternate_channel_bits = std::max(alternate_channel_bits, (int) component.component_bit_depth); | ||
| break; | ||
| case component_type_Cb: | ||
| case component_type_Cr: | ||
| chroma_bits = std::max(chroma_bits, (int) component.component_bit_depth); | ||
| break; | ||
| // TODO: there are other things we'll need to handle eventually, like palette. | ||
| } | ||
| } | ||
| if (chroma_bits > 0) { | ||
| return chroma_bits; | ||
| } | ||
| else if (alternate_channel_bits > 0) { | ||
| return alternate_channel_bits; | ||
| } | ||
| else { | ||
| return 8; | ||
| } | ||
| } | ||
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| Error Decoder_uncompressed::get_coded_image_colorspace(heif_colorspace* out_colorspace, heif_chroma* out_chroma) const | ||
| { | ||
| if (m_uncC->get_version() == 1) { | ||
| // This is the shortform case, no cmpd box, and always some kind of RGB | ||
| *out_colorspace = heif_colorspace_RGB; | ||
| if (m_uncC->get_profile() == fourcc("rgb3")) { | ||
| *out_chroma = heif_chroma_interleaved_RGB; | ||
| } | ||
| else if ((m_uncC->get_profile() == fourcc("rgba")) || (m_uncC->get_profile() == fourcc("abgr"))) { | ||
| *out_chroma = heif_chroma_interleaved_RGBA; | ||
| } | ||
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| return Error::Ok; | ||
| } | ||
| else if (m_cmpd) { | ||
| UncompressedImageCodec::get_heif_chroma_uncompressed(m_uncC, m_cmpd, out_chroma, out_colorspace); | ||
| return Error::Ok; | ||
| } | ||
| else { | ||
| return {heif_error_Invalid_input, | ||
| heif_suberror_Unspecified, | ||
| "Missing 'cmpd' box."}; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| /* | ||
| * HEIF codec. | ||
| * Copyright (c) 2024 Dirk Farin <[email protected]> | ||
| * | ||
| * This file is part of libheif. | ||
| * | ||
| * libheif is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as | ||
| * published by the Free Software Foundation, either version 3 of | ||
| * the License, or (at your option) any later version. | ||
| * | ||
| * libheif 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 Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with libheif. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
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| #ifndef HEIF_UNC_DEC_H | ||
| #define HEIF_UNC_DEC_H | ||
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| #include "libheif/heif.h" | ||
| #include "box.h" | ||
| #include "error.h" | ||
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| #include <memory> | ||
| #include <vector> | ||
| #include "codecs/decoder.h" | ||
|
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| class Box_uncC; | ||
| class Box_cmpd; | ||
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| class Decoder_uncompressed : public Decoder | ||
| { | ||
| public: | ||
| explicit Decoder_uncompressed(const std::shared_ptr<const Box_uncC>& uncC, | ||
| const std::shared_ptr<const Box_cmpd>& cmpd) : m_uncC(uncC), m_cmpd(cmpd) {} | ||
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| heif_compression_format get_compression_format() const override { return heif_compression_uncompressed; } | ||
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| int get_luma_bits_per_pixel() const override; | ||
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| int get_chroma_bits_per_pixel() const override; | ||
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| Error get_coded_image_colorspace(heif_colorspace*, heif_chroma*) const override; | ||
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| Result<std::vector<uint8_t>> read_bitstream_configuration_data() const override; | ||
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| private: | ||
| const std::shared_ptr<const Box_uncC> m_uncC; | ||
| const std::shared_ptr<const Box_cmpd> m_cmpd; | ||
| }; | ||
|
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| #endif |
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