commit f63799bc2548b14415a15b3d439fabd8cb53cbac Author: IllusionMan1212 Date: Thu May 2 12:12:13 2024 +0200 initial diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3bf9697 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +odinfmt.json +example/example diff --git a/.vscode/launch.json b/.vscode/launch.json new file mode 100644 index 0000000..8986876 --- /dev/null +++ b/.vscode/launch.json @@ -0,0 +1,16 @@ +{ + // Use IntelliSense to learn about possible attributes. + // Hover to view descriptions of existing attributes. + // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 + "version": "0.2.0", + "configurations": [ + { + "name": "Debug (CPPDBG)", + "type": "cppdbg", + "request": "launch", + "program": "${workspaceFolder}/example/example", + "args": ["${workspaceFolder}/example/colors_wcg_hdr_rec2020.avif"], + "cwd": "${workspaceRoot}", + } + ] +} \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..a47eb81 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/TODO.md b/TODO.md new file mode 100644 index 0000000..fe4ed52 --- /dev/null +++ b/TODO.md @@ -0,0 +1,15 @@ +Decoder:- + - Figure out how to parse OBU structures (kinda getting there) + - Implement a bitstream reader + - Figure out how to apply the metadata to the mdat box. + - By reading the spec in its entirety. + - By checking out libheif's code. +Encoder:- + + +Goals:- +- Fast and optimized +- Reliable and robust (doesn't shit itself and panic when things go wrong, and can handle big data) +- Works on lots of targets (Linux, Windows, Darwin, Wasm, BSDs?) +- Tests? +- Get it merged into the Odin core library? diff --git a/avif.odin b/avif.odin new file mode 100644 index 0000000..46f658d --- /dev/null +++ b/avif.odin @@ -0,0 +1,491 @@ +package avif + +import "core:bytes" +import "core:fmt" +import "core:image" +import "core:encoding/endian" +import "core:io" +import "core:strings" + +Error :: image.Error +//Image :: image.Image +Options :: image.Options + +Image :: struct { + compatible_brands: [dynamic]ISOBMFFBrand, + major_brand: ISOBMFFBrand, + brand_version: u32, + handler_type: HEIFTrack, + handler_name: string, + primary_item_id: u32, +} + +// Noticed avif compatible brands, avif, mif1, miaf, MA1A, MA1B +// Files containing MA1A as a compatible brand are expected to list the following brands in any order: +// avif, mif1, miaf, MA1A +// If the file contains a `pict` track compliant with this profile then it's expected to list the following brands in any order: +// avis, msf1, miaf, MA1A +// Files containing MA1B as a compatible brand is expected to list the following brands in any order: +// avif, mif1, miaf, MA1B +// If the file contains a `pict` track compliant with this profile then it's expected to list the following brands in any order: +// avis, msf1, miaf, MA1B +// If the file contains a `pict` track compliant with this profile and made only of samples marked `sync` then it's expected to list the following brands in any order: +// avis, avio, msf1, miaf, MA1B + +VersionAndFlags :: bit_field u32 { + flags: u32 | 24, + version: u16 | 8, // should be u8 but compiler fails an assertion that I couldn't reproduce +} + +ILOCSize :: bit_field u16 { + index_size_OR_reserved: u8 | 4, + base_offset_size: u8 | 4, + + length_size: u8 | 4, + offset_size: u8 | 4, +} + +// NOTE: We order the bits in the reverse order because Odin's bit_field is LSB while the spec is MSB. +AV1CodecConfigRecord :: bit_field u32 { + initial_presentation_delay_minus_one_OR_reserved: u8 | 4, + initial_presentation_delay_present: u8 | 1, + reserved: u8 | 3, + + chroma_sample_position: u8 | 2, + chroma_subsampling_y: u8 | 1, + chroma_subsampling_x: u8 | 1, + monochrome: u8 | 1, + twelve_bit: u8 | 1, + high_bitdepth: u8 | 1, + seq_tier_0: u8 | 1, + + seq_level_idx_0: u8 | 5, + seq_profile: u8 | 3, + + version: u8 | 7, + marker: u8 | 1, +} + +ISOBMFFBrand :: enum u32 { + AVIF = 'a' << 24 | 'v' << 16 | 'i' << 8 | 'f', + MIF1 = 'm' << 24 | 'i' << 16 | 'f' << 8 | '1', + MIAF = 'm' << 24 | 'i' << 16 | 'a' << 8 | 'f', + MA1A = 'M' << 24 | 'A' << 16 | '1' << 8 | 'A', + MA1B = 'M' << 24 | 'A' << 16 | '1' << 8 | 'B', + AVIS = 'a' << 24 | 'v' << 16 | 'i' << 8 | 's', + AVIO = 'a' << 24 | 'v' << 16 | 'i' << 8 | 'o', + MSF1 = 'm' << 24 | 's' << 16 | 'f' << 8 | '1', + AV01 = 'a' << 24 | 'v' << 16 | '0' << 8 | '1', +} + +HEIFTrack :: enum u32 { + PICT = 'p' << 24 | 'i' << 16 | 'c' << 8 | 't', // Picture track +} + +save_to_buffer :: proc( + output: ^bytes.Buffer, + img: ^Image, + options := Options{}, + allocator := context.allocator, +) -> ( + err: Error, +) { + // TODO: + return nil +} + +load_from_bytes :: proc( + data: []byte, + options := Options{}, + allocator := context.allocator, +) -> ( + img: ^Image, + err: Error, +) { + context.allocator = allocator + + img = new(Image) + //img.which = .AVIF + + reader: Reader + reader_init(&reader, data) + + res := read_box(img, &reader) + for res == .None { + res = read_box(img, &reader) + } + + if res != .EOF { + fmt.eprintln(res) + return nil, .Invalid_Input_Image + } + + return img, nil +} + +@(private) +read_box :: proc(img: ^Image, reader: ^Reader) -> (err: io.Error) { + if read_header(reader) == .EOF { + return .EOF + } + + // if the Box has a size 0 then it's the last Box, parse it and return EOF + if reader.size == 0 { + err = .EOF + } + + fmt.println("box size:", reader.size) + fmt.println("type:", reader.type) + + #partial switch reader.type { + case .FTYP: + read_ftyp(img, reader) + case .META: + read_meta(reader) + case .HDLR: + read_hdlr(img, reader) + case .PITM: + read_pitm(img, reader) + case .ILOC: + read_iloc(reader) + case .IINF: + read_iinf(reader) + case .INFE: + read_infe(reader) + case .IPRP: // Just serves as a container for the boxes inside it. + case .IPCO: // Same as IPRP + case .ISPE: + read_ispe(reader) + case .PIXI: + read_pixi(reader) + case .AV1C: + read_av1c(reader) + case .COLR: + read_colr(reader) + case .IPMA: + read_ipma(reader) + case: + // Skip unknown boxes + skip_box(reader) + } + + return err +} + +@(private) +read_ipma :: proc(reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + entry_count, _ := read_u32be(reader) + + fmt.println("association entries:", entry_count) + + for i in 0 ..< entry_count { + item_id: u32 + if vaf.version == 0 { + t, _ := read_u16be(reader) + item_id = auto_cast t + } else { + item_id, _ = read_u32be(reader) + } + + association_count, _ := read_byte(reader) + fmt.println("item_id:", item_id) + fmt.println("association_count:", association_count) + + // TODO: something something association, IDFK I DONT HAVE THE LATEST SPEC CUZ ITS PAYWALLED + for c in 0 ..< association_count { + if (vaf.flags & 1) == 1 { // if LSB is 1 + // TODO: idfk + //data: [2]u8 + //reader_read(reader, data[:]) + } else { + data, _ := read_byte(reader) + fmt.println(data) + } + } + } +} + +@(private) +read_colr :: proc(reader: ^Reader) { + _color_type: [4]u8 + read_slice(reader, _color_type[:]) + color_type := string(_color_type[:]) + + if color_type == "nclx" { + color_primaries, _ := read_u16be(reader) + transfer_characteristics, _ := read_u16be(reader) + matrix_coefficients, _ := read_u16be(reader) + + data, _ := read_byte(reader) + + // remaining 7 bits are reserved + full_range_flag := data >> 7 + + fmt.println("color primaries:", color_primaries) + fmt.println("transfer characteristics:", transfer_characteristics) + fmt.println("matrix coefficients:", matrix_coefficients) + fmt.println("full_range_flag", full_range_flag) + } else if color_type == "rICC" { + // TODO: restricted icc profile + fmt.eprintln("rICC color profile is not supported yet") + } else if color_type == "prof" { + fmt.eprintln("prof color profile is not supported yet") + // TODO: icc profile + } +} + +@(private) +read_av1c :: proc(reader: ^Reader) { + data, _ := read_bitfield(reader, AV1CodecConfigRecord) + + fmt.println(data) +} + +@(private) +read_pixi :: proc(reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + + channel_bits: []u8 + + if vaf.version == 0 { + channels_count, _ := read_byte(reader) + channel_bits = make([]u8, channels_count) + + fmt.printfln("There are %d channels in this image", channels_count) + + for i in 0 ..< channels_count { + bits_per_channel, _ := read_byte(reader) + channel_bits[i] = bits_per_channel + } + } + + fmt.println(channel_bits) +} + +@(private) +read_ispe :: proc(reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + + if vaf.version == 0 { + width, _ := read_u32be(reader) + height, _ := read_u32be(reader) + + fmt.println("Width:", width) + fmt.println("Height:", height) + } else { + // TODO: should we error here?? + fmt.eprintln("Unknown ispe version:", vaf.version) + } +} + +@(private) +read_infe :: proc(reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + + item_id: u32 + item_protection_index: u16 + item_name: string + content_type: string + content_encoding: string + + if vaf.version == 0 || vaf.version == 1 { + _item_id, _ := read_u16be(reader) + item_id = auto_cast _item_id + item_protection_index, _ = read_u16be(reader) + + item_name, _ = read_string(reader) + content_type, _ = read_string(reader) + content_encoding, _ = read_string(reader) + } + + if vaf.version == 1 { + // TODO: ?? not sure about the ItemInfoExtension class + } + + if vaf.version >= 2 { + // Reference: https://github.com/strukturag/libheif/blob/master/libheif/box.cc#L1567 + hidden_item: bool = (vaf.flags & 1) == 1 + + if vaf.version == 2 { + t, _ := read_u16be(reader) + item_id = auto_cast t + } else if vaf.version == 3 { + item_id, _ = read_u32be(reader) + } + + item_uri_type: string + item_type: [4]u8 + + item_protection_index, _ = read_u16be(reader) + read_slice(reader, item_type[:]) + + item_name, _ = read_string(reader) + + // This is for ISOBMFF, avif uses av01 and similar named types + if string(item_type[:]) == "mime" { + content_type, _ = read_string(reader) + content_encoding, _ := read_string(reader) + } else if string(item_type[:]) == "uri " { + item_uri_type, _ = read_string(reader) + } else if string(item_type[:]) == "av01" { + // TODO: ??? idfk + } + + fmt.println("item type", string(item_type[:])) + fmt.println("item uri type", item_uri_type) + } + + fmt.println("VAF:", vaf) + fmt.println("item_id", item_id) + fmt.println("item_protection_index", item_protection_index) + fmt.println("item_name", item_name) + fmt.println("content type", content_type) + fmt.println("content encoding", content_encoding) +} + +@(private) +read_iinf :: proc(reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + + entry_count: u32 = 0 + if vaf.version == 0 { + t, _ := read_u16be(reader) + entry_count = auto_cast t + } else { + entry_count, _ = read_u32be(reader) + } +} + +@(private) +read_iloc :: proc(reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + size, _ := read_bitfield(reader, ILOCSize) + + item_count: u32 + if vaf.version < 2 { + _item_count, _ := read_u16be(reader) + item_count = auto_cast _item_count + } else if vaf.version == 2 { + item_count, _ = read_u32be(reader) + } + + fmt.println("VAF:", vaf) + fmt.println("Size:", size) + fmt.println("Item count", item_count) + + for i in 0 ..< item_count { + item_id: u32 + construction_method: u8 = 0 + if vaf.version < 2 { + _item_id, _ := read_u16be(reader) + item_id = auto_cast _item_id + } else { + item_count, _ = read_u32be(reader) + } + + if vaf.version == 1 || vaf.version == 2 { + data, _ := read_u16be(reader) + + // First 12 bits are reserved + construction_method = auto_cast (data & 0xF) + } + + data_reference_index, _ := read_u16be(reader) + base_offset: u64 = 0 + if size.base_offset_size == 4 { + t, _ := read_u32be(reader) + base_offset = auto_cast t + } else if size.base_offset_size == 8 { + base_offset, _ = read_u64be(reader) + } + extent_count, _ := read_u16be(reader) + + fmt.println("item id:", item_id) + fmt.println("construction method", construction_method) + fmt.println("data reference index", data_reference_index) + fmt.println("base offset", base_offset) + fmt.println("extent count", extent_count) + + for j in 0 ..< extent_count { + if (vaf.version == 1 || vaf.version == 2) && size.index_size_OR_reserved > 0 { + extent_index: u64 = 0 + if size.index_size_OR_reserved == 4 { + t, _ := read_u32be(reader) + extent_index = auto_cast t + } else if size.index_size_OR_reserved == 8 { + extent_index, _ = read_u64be(reader) + } + + fmt.println("extent index", extent_index) + } + extent_offset: u64 = 0 + extent_length: u64 = 0 + if size.offset_size == 4 { + t, _ := read_u32be(reader) + extent_offset = auto_cast t + } else if size.offset_size == 8 { + extent_offset, _ = read_u64be(reader) + } + + + if size.length_size == 4 { + t, _ := read_u32be(reader) + extent_length = auto_cast t + } else if size.length_size == 8 { + extent_length, _ = read_u64be(reader) + } + + fmt.println("extent offset", extent_offset) + fmt.println("extent length", extent_length) + } + } +} + +@(private) +read_pitm :: proc(img: ^Image, reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + + if vaf.version == 0 { + item_id, _ := read_u16be(reader) + + img.primary_item_id = auto_cast item_id + } else { + img.primary_item_id, _ = read_u32be(reader) + } +} + +@(private) +read_hdlr :: proc(img: ^Image, reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + + reader_seek(reader, 4, .Current) // Field called 'Predefined'. Always 0? + handler_type, err := read_u32be(reader) + if err != nil { + fmt.eprintln(err) + } + reader_seek(reader, 4 * 3, .Current) // array with size 3 of 4byte reserved data. [3]u32 + + img.handler_type = transmute(HEIFTrack)handler_type + img.handler_name, _ = read_string(reader) +} + +@(private) +read_meta :: proc(reader: ^Reader) { + vaf, _ := read_bitfield(reader, VersionAndFlags) + fmt.println("Meta Box VAF:", vaf) +} + +@(private) +read_ftyp :: proc(img: ^Image, reader: ^Reader) { + major_brand, _ := read_u32be(reader) + img.major_brand = transmute(ISOBMFFBrand)major_brand + img.brand_version, _ = read_u32be(reader) + + num_compatible_brands := remaining_box_size(reader) / size_of(ISOBMFFBrand) + + for i in 0 ..< num_compatible_brands { + brand, _ := read_u32be(reader) + append(&img.compatible_brands, transmute(ISOBMFFBrand)brand) + } +} diff --git a/avif_js.odin b/avif_js.odin new file mode 100644 index 0000000..e34a162 --- /dev/null +++ b/avif_js.odin @@ -0,0 +1,6 @@ +//+build js +package avif + +save :: proc{save_to_buffer} + +load :: proc{load_from_bytes} diff --git a/avif_os.odin b/avif_os.odin new file mode 100644 index 0000000..9d4b093 --- /dev/null +++ b/avif_os.odin @@ -0,0 +1,33 @@ +//+build !js +package avif + +import "core:os" +import "core:bytes" + +save :: proc{save_to_file, save_to_buffer} + +save_to_file :: proc(output: string, img: ^Image, options := Options{}, allocator := context.allocator) -> (err: Error) { + out := &bytes.Buffer{} + defer bytes.buffer_destroy(out) + + save_to_buffer(out, img, options) or_return + write_ok := os.write_entire_file(output, out.buf[:]) + + return nil if write_ok else .Unable_To_Write_File +} + + +load :: proc{load_from_file, load_from_bytes} + +load_from_file :: proc(filename: string, options := Options{}, allocator := context.allocator) -> (img: ^Image, err: Error) { + context.allocator = allocator + + data, ok := os.read_entire_file(filename) + defer delete(data) + + if ok { + return load_from_bytes(data, options) + } else { + return nil, .Unable_To_Read_File + } +} diff --git a/box.odin b/box.odin new file mode 100644 index 0000000..4da6315 --- /dev/null +++ b/box.odin @@ -0,0 +1,219 @@ +package avif + +import "core:encoding/endian" +import "core:fmt" +import "core:io" +import "core:strings" +import "core:unicode/utf8" + +BOX_HEADER_SIZE :: 8 // 4 for box size, 4 for box type + +_BoxError :: enum { + ReadExceedsBox, +} + +BoxType :: enum u32 { + FTYP = 'f' << 24 | 't' << 16 | 'y' << 8 | 'p', // File Type + MDAT = 'm' << 24 | 'd' << 16 | 'a' << 8 | 't', // Media Data + META = 'm' << 24 | 'e' << 16 | 't' << 8 | 'a', // Metadata + HDLR = 'h' << 24 | 'd' << 16 | 'l' << 8 | 'r', // Declares Metadata Handler Type + ILOC = 'i' << 24 | 'l' << 16 | 'o' << 8 | 'c', // Item Location + IINF = 'i' << 24 | 'i' << 16 | 'n' << 8 | 'f', // Item Information + INFE = 'i' << 24 | 'n' << 16 | 'f' << 8 | 'e', // Item Info Entry + PITM = 'p' << 24 | 'i' << 16 | 't' << 8 | 'm', // Primary Item Reference + IPRP = 'i' << 24 | 'p' << 16 | 'r' << 8 | 'p', // Item Properties + IREF = 'i' << 24 | 'r' << 16 | 'e' << 8 | 'f', // Item Reference + GRPL = 'g' << 24 | 'r' << 16 | 'p' << 8 | 'l', // Group List + IPCO = 'i' << 24 | 'p' << 16 | 'c' << 8 | 'o', // Item Property Container + ISPE = 'i' << 24 | 's' << 16 | 'p' << 8 | 'e', // Image Spatial Extents + PIXI = 'p' << 24 | 'i' << 16 | 'x' << 8 | 'i', // Pixel Information + COLR = 'c' << 24 | 'o' << 16 | 'l' << 8 | 'r', // Color Information + AV1C = 'a' << 24 | 'v' << 16 | '1' << 8 | 'C', // AV1 Codec Configuration + IPMA = 'i' << 24 | 'p' << 16 | 'm' << 8 | 'a', // Item Property Association + CLLI = 'c' << 24 | 'l' << 16 | 'l' << 8 | 'i', // Content Light Level Info +} + +BoxError :: union { + io.Error, + _BoxError, +} + +Box :: struct { + size: u32, + type: BoxType, +} + +Reader :: struct { + using current_box: Box, + s: []byte, // read-only buffer + i: i64, // current reading index + box_pos: i64, // Byte index for the Box +} + +reader_init :: proc(r: ^Reader, s: []byte) { + r.s = s + r.i = 0 + r.box_pos = 0 +} + +read_header :: proc(r: ^Reader) -> (err: BoxError) { + r.box_pos = 0 + r.size = read_u32be(r) or_return + type := read_u32be(r) or_return + r.type = transmute(BoxType)type + + return err +} + +read_byte :: proc(r: ^Reader) -> (byte, BoxError) { + if r.i >= i64(len(r.s)) { + return 0, .EOF + } + if r.box_pos >= i64(r.size) { + return 0, .ReadExceedsBox + } + b := r.s[r.i] + r.i += 1 + r.box_pos += 1 + return b, nil +} + +read_u16be :: proc(r: ^Reader) -> (u16, BoxError) { + if r.i >= i64(len(r.s)) { + return 0, .EOF + } + if r.box_pos + 2 > i64(r.size) { + return 0, .ReadExceedsBox + } + b := endian.unchecked_get_u16be(r.s[r.i:]) + r.i += 2 + r.box_pos += 2 + return b, nil +} + +read_u32be :: proc(r: ^Reader) -> (u32, BoxError) { + if r.i >= i64(len(r.s)) { + return 0, .EOF + } + if r.size != 0 && r.box_pos + 4 > i64(r.size) { + return 0, .ReadExceedsBox + } + b := endian.unchecked_get_u32be(r.s[r.i:]) + r.i += 4 + r.box_pos += 4 + return b, nil +} + +read_u64be :: proc(r: ^Reader) -> (u64, BoxError) { + if r.i >= i64(len(r.s)) { + return 0, .EOF + } + if r.size != 0 && r.box_pos + 8 > i64(r.size) { + return 0, .ReadExceedsBox + } + b := endian.unchecked_get_u64be(r.s[r.i:]) + r.i += 8 + r.box_pos += 8 + return b, nil +} + +read_slice :: proc(r: ^Reader, s: []byte) -> (n: int, err: BoxError) { + if r.i >= i64(len(r.s)) { + return 0, .EOF + } + n = copy(s, r.s[r.i:]) + if r.box_pos + i64(n) > i64(r.size) { + return 0, .ReadExceedsBox + } + r.i += i64(n) + r.box_pos += i64(n) + return +} + +read_rune :: proc(r: ^Reader) -> (ch: rune, size: int, err: BoxError) { + if r.i >= i64(len(r.s)) { + return 0, 0, .EOF + } + if c := r.s[r.i]; c < utf8.RUNE_SELF { + if r.box_pos >= i64(r.size) { + return 0, 0, .ReadExceedsBox + } + r.i += 1 + r.box_pos += 1 + return rune(c), 1, nil + } + ch, size = utf8.decode_rune(r.s[r.i:]) + if r.box_pos + i64(size) > i64(r.size) { + return 0, 0, .ReadExceedsBox + } + r.i += i64(size) + r.box_pos += i64(size) + return +} + +read_string :: proc(r: ^Reader) -> (str: string, err: BoxError) { + if r.i >= i64(len(r.s)) { + return "", .EOF + } + + sb: strings.Builder + strings.builder_init_len_cap(&sb, 0, 8) + defer strings.builder_destroy(&sb) + + for { + rune, _ := read_rune(r) or_break + if rune == '\x00' { + break + } + + strings.write_rune(&sb, rune) + } + + return strings.clone(strings.to_string(sb)), err +} + +@(private = "file") +read_bitfield_u32 :: proc(r: ^Reader, $T: typeid) -> (T, BoxError) where size_of(T) == 4 { + b, err := read_u32be(r) + return T(b), err +} + +@(private = "file") +read_bitfield_u16 :: proc(r: ^Reader, $T: typeid) -> (T, BoxError) where size_of(T) == 2 { + b, err := read_u16be(r) + return T(b), err +} + +read_bitfield :: proc { + read_bitfield_u16, + read_bitfield_u32, +} + +skip_box :: proc(r: ^Reader) { + fmt.printfln("SKIPPED! %v with size %d", r.type, r.size) + reader_seek(r, auto_cast r.size - BOX_HEADER_SIZE, .Current) +} + +remaining_box_size :: proc(r: ^Reader) -> i64 { + return i64(r.size) - r.box_pos +} + +reader_seek :: proc(r: ^Reader, offset: i64, whence: io.Seek_From) -> (i64, BoxError) { + abs: i64 + switch whence { + case .Start: + abs = offset + case .Current: + abs = r.i + offset + case .End: + abs = i64(len(r.s)) + offset + case: + return 0, .Invalid_Whence + } + + if abs < 0 { + return 0, .Invalid_Offset + } + r.i = abs + return abs, nil +} diff --git a/example/colors_wcg_hdr_rec2020.avif b/example/colors_wcg_hdr_rec2020.avif new file mode 100644 index 0000000..063d61c Binary files /dev/null and b/example/colors_wcg_hdr_rec2020.avif differ diff --git a/example/main.odin b/example/main.odin new file mode 100644 index 0000000..006e78a --- /dev/null +++ b/example/main.odin @@ -0,0 +1,20 @@ +package avif_example + +import "core:fmt" +import "core:os" +import avif "../" + +main :: proc() { + if len(os.args) < 2 { + fmt.eprintln("Please provide a path to an avif image.") + os.exit(1) + } + + img, err := avif.load_from_file(os.args[1]) + if err != nil { + fmt.eprintln(err) + os.exit(1) + } + + fmt.println(img) +} diff --git a/example/seine_sdr_gainmap_big_srgb.avif b/example/seine_sdr_gainmap_big_srgb.avif new file mode 100644 index 0000000..ffdfaca Binary files /dev/null and b/example/seine_sdr_gainmap_big_srgb.avif differ diff --git a/example/sofa_grid1x5_420.avif b/example/sofa_grid1x5_420.avif new file mode 100644 index 0000000..ae10c0d Binary files /dev/null and b/example/sofa_grid1x5_420.avif differ diff --git a/example/white_1x1.avif b/example/white_1x1.avif new file mode 100644 index 0000000..9d5c466 Binary files /dev/null and b/example/white_1x1.avif differ diff --git a/obu.odin b/obu.odin new file mode 100644 index 0000000..dbddf43 --- /dev/null +++ b/obu.odin @@ -0,0 +1,70 @@ +package avif + +import "core:io" + +OBUType :: enum u8 { + SEQUENCE_HEADER = 1, + TEMPORAL_DELIMITER = 2, + FRAME_HEADER = 3, + TILE_GROUP = 4, + METADATA = 5, + FRAME = 6, + REDUNDANT_FRAME_HEADER = 7, + TILE_LIST = 8, + PADDING = 15, +} + +// TODO: write a nice bitstream reader +// ??? Still don't know how I want this to work +BitstreamReader :: struct { + data: []byte, + pos: i64, // Number of bits read from the data slice +} + +OBUHeader :: bit_field u8 { + obu_reserved: u8 | 1, + obu_has_size_field: u8 | 1, + obu_extension_flag: u8 | 1, + obu_type: OBUType | 4, + obu_forbidden_bit: u8 | 1, +} + +OBUExtensionHeader :: bit_field u8 { + extension_header_reserved: u8 | 3, + spatial_id: u8 | 2, + temporal_id: u8 | 3, +} + +read_bit :: proc() -> b8 { + // TODO: idfk + // This should read a single bit from the bitstream and advance the bitstream position by 1 + + return false +} + +f :: proc(n: int) -> u64 { + x: u64 = 0 + + for i in 0 ..< n { + x = 2 * x + auto_cast read_bit() + } + + return x +} + +leb128 :: proc() -> u64 { + value: u64 = 0 + leb128_bytes := 0 + + for i: u64 = 0; i < 8; i += 1 { + leb128_byte := f(8) + value |= ((leb128_byte & 0x7f) << (i * 7)) + leb128_bytes += 1 + + if (leb128_byte & 0x80) == 0 { + break + } + } + + return value +}