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Overview
Comment: | lithium-photo_process: new package providing a programmable image processor |
---|---|
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
faf7b91cdf4fe221a261de7468b18d2d |
User & Date: | nat 2019-05-07 18:52:16 |
Context
2019-05-08
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15:38 | lithium-photo_posts: new package with a generator for dynamic multipages Leaf check-in: 17d46aa3a7 user: nat tags: trunk | |
2019-05-07
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18:52 | lithium-photo_process: new package providing a programmable image processor check-in: faf7b91cdf user: nat tags: trunk | |
2019-05-06
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20:08 | turbojpeg_thin: add a thin binding to TurboJPEG library check-in: fa8cac9bcb user: nat tags: trunk | |
Changes
Added src/lithium-photo_process.adb.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR -- -- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES -- -- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN -- -- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF -- -- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. -- ------------------------------------------------------------------------------ with Ada.Streams.Stream_IO; with Natools.S_Expressions.Atom_Ref_Constructors; with Natools.S_Expressions.Enumeration_IO; with Natools.S_Expressions.File_Readers; with Natools.S_Expressions.Interpreter_Loop; with Natools.Web; package body Lithium.Photo_Process is package C renames Interfaces.C; package Description_Elements is type Enum is (Unknown, Max_Width, Max_Height, Quality, Path, Prefix, Suffix); end Description_Elements; package Description_IO is new Sx.Enumeration_IO.Typed_IO (Description_Elements.Enum); function Adjust_Orientation (Ref : in Data_Refs.Immutable_Reference; Orientation : in Orientations.Enum) return Data_Refs.Immutable_Reference; procedure Adjust_Plane (Plane : in TurboJPEG_Thin.Bytes.Pointer; Width, Height : in Positive; Old_Plane : in TurboJPEG_Thin.Bytes.Pointer; Old_Width, Old_Height : in Positive; Orientation : in Orientations.Enum); function To_String (Atom : in Sx.Atom_Refs.Immutable_Reference; Default : in String := "") return String is (if Atom.Is_Empty then Default else Sx.To_String (Atom.Query)); procedure Update_Description (Process : in out Process_Description; Context : in Natools.Meaningless_Type; Name : in Sx.Atom; Arguments : in out Sx.Lockable.Descriptor'Class); function Resize_Image (Input : in Image_Data; New_Width, New_Height : in Positive) return Data_Refs.Immutable_Reference; procedure Resize_Plane (New_Plane : in Buffer; New_Width, New_Height : in Positive; Old_Plane : in Buffer; Old_Width, Old_Height : in Positive); procedure Write (File_Name : in String; Image : in Image_Data; Quality : in Natural); procedure Read_Description is new Sx.Interpreter_Loop (Process_Description, Natools.Meaningless_Type, Update_Description); -------------------------------- -- Re-orientation expressions -- -------------------------------- function New_Height (Width, Height : in Positive; Orientation : in Orientations.Enum) return Positive is (case Orientation is when Orientations.Top_Left | Orientations.Top_Right | Orientations.Bottom_Left | Orientations.Bottom_Right => Height, when Orientations.Left_Top | Orientations.Right_Top | Orientations.Left_Bottom | Orientations.Right_Bottom => Width); function New_Width (Width, Height : in Positive; Orientation : in Orientations.Enum) return Positive is (case Orientation is when Orientations.Top_Left | Orientations.Top_Right | Orientations.Bottom_Left | Orientations.Bottom_Right => Width, when Orientations.Left_Top | Orientations.Right_Top | Orientations.Left_Bottom | Orientations.Right_Bottom => Height); function Old_X (X, Y : in Natural; Width, Height : in Positive; Orientation : in Orientations.Enum) return Natural is (case Orientation is when Orientations.Top_Left | Orientations.Bottom_Left => X, when Orientations.Top_Right | Orientations.Bottom_Right => Width - X - 1, when Orientations.Left_Top | Orientations.Right_Top => Y, when Orientations.Left_Bottom | Orientations.Right_Bottom => Height - Y - 1); function Old_Y (X, Y : in Natural; Width, Height : in Positive; Orientation : in Orientations.Enum) return Natural is (case Orientation is when Orientations.Left_Top | Orientations.Left_Bottom => X, when Orientations.Right_Top | Orientations.Right_Bottom => Width - X - 1, when Orientations.Top_Left | Orientations.Top_Right => Y, when Orientations.Bottom_Left | Orientations.Bottom_Right => Height - Y - 1); function Offset (X, Y : in Natural; Stride : in Positive) return C.ptrdiff_t is (C."+" (C."*" (C.ptrdiff_t (Y), C.ptrdiff_t (Stride)), C.ptrdiff_t (X))); function Plane_Height (Label : in TurboJPEG_Thin.Plane_Label; Image_Height : in Positive; Sub_Samp : in C.int) return Positive is (Positive (TurboJPEG_Thin.Plane_Height (TurboJPEG_Thin.Plane_Label'Pos (Label), C.int (Image_Height), Sub_Samp))); function Plane_Width (Label : in TurboJPEG_Thin.Plane_Label; Image_Width : in Positive; Sub_Samp : in C.int) return Positive is (Positive (TurboJPEG_Thin.Plane_Width (TurboJPEG_Thin.Plane_Label'Pos (Label), C.int (Image_Width), Sub_Samp))); function Ptr (Base : in TurboJPEG_Thin.Bytes.Pointer; X, Y : in Natural; Stride : in Positive) return TurboJPEG_Thin.Bytes.Pointer is (TurboJPEG_Thin.Bytes."+" (Base, Offset (X, Y, Stride))); ------------------------------ -- Local Helper Subprograms -- ------------------------------ function Adjust_Orientation (Ref : in Data_Refs.Immutable_Reference; Orientation : in Orientations.Enum) return Data_Refs.Immutable_Reference is use type Orientations.Enum; Input : constant Data_Refs.Accessor := Ref.Query; Width : constant Natural := New_Width (Input.Width, Input.Height, Orientation); Height : constant Natural := New_Height (Input.Width, Input.Height, Orientation); begin if Orientation = Orientations.Top_Left then return Ref; end if; declare use Orientations; use type C.int; SS : constant C.int := (case Orientation is when Top_Left | Top_Right | Bottom_Left | Bottom_Right => Input.Sub_Samp, when Left_Top | Right_Top | Left_Bottom | Right_Bottom => (case Input.Sub_Samp is when 0 | 2 => Input.Sub_Samp, when 1 => 4, when 4 => 1, when others => raise Constraint_Error with "Unsupported sub-sampling orientation")); Output : constant Data_Refs.Data_Access := new Image_Data'(Create (Width, Height, SS)); Result : constant Data_Refs.Immutable_Reference := Data_Refs.Create (Output); begin for I in Input.Planes'Range loop Adjust_Plane (Output.Planes (I).Data, Plane_Width (I, Width, Output.Sub_Samp), Plane_Height (I, Height, Output.Sub_Samp), Input.Planes (I).Data, Plane_Width (I, Input.Width, Input.Sub_Samp), Plane_Height (I, Input.Height, Input.Sub_Samp), Orientation); end loop; return Result; end; end Adjust_Orientation; procedure Adjust_Plane (Plane : in TurboJPEG_Thin.Bytes.Pointer; Width, Height : in Positive; Old_Plane : in TurboJPEG_Thin.Bytes.Pointer; Old_Width, Old_Height : in Positive; Orientation : in Orientations.Enum) is pragma Unreferenced (Old_Height); X, Y : Natural; begin for New_Y in 0 .. Height - 1 loop for New_X in 0 .. Width - 1 loop X := Old_X (New_X, New_Y, Width, Height, Orientation); Y := Old_Y (New_X, New_Y, Width, Height, Orientation); Ptr (Plane, New_X, New_Y, Width).all := Ptr (Old_Plane, X, Y, Old_Width).all; end loop; end loop; end Adjust_Plane; function Resize_Image (Input : in Image_Data; New_Width, New_Height : in Positive) return Data_Refs.Immutable_Reference is Data : constant Data_Refs.Data_Access := new Image_Data'(Create (New_Width, New_Height, Input.Sub_Samp)); Ref : constant Data_Refs.Immutable_Reference := Data_Refs.Create (Data); begin for I in Data.Planes'Range loop Resize_Plane (Data.Planes (I), Plane_Width (I, New_Width, Data.Sub_Samp), Plane_Height (I, New_Height, Data.Sub_Samp), Input.Planes (I), Plane_Width (I, Input.Width, Input.Sub_Samp), Plane_Height (I, Input.Height, Input.Sub_Samp)); end loop; return Ref; end Resize_Image; procedure Resize_Plane (New_Plane : in Buffer; New_Width, New_Height : in Positive; Old_Plane : in Buffer; Old_Width, Old_Height : in Positive) is type Accumulator is range 0 .. 2 ** 63 - 1; begin for New_Y in 0 .. New_Height - 1 loop for New_X in 0 .. New_Width - 1 loop declare First_X : constant Natural := New_X * Old_Width / New_Width; First_Xw : constant Natural := New_Width - New_X * Old_Width mod New_Width; Last_X : constant Natural := (New_X + 1) * Old_Width / New_Width; Last_Xw : constant Natural := (New_X + 1) * Old_Width mod New_Width; First_Y : constant Natural := New_Y * Old_Height / New_Height; First_Yw : constant Natural := New_Height - New_Y * Old_Height mod New_Height; Last_Y : constant Natural := (New_Y + 1) * Old_Height / New_Height; Last_Yw : constant Natural := (New_Y + 1) * Old_Height mod New_Height; Xw, Yw, W : Accumulator; Acc, Acc_W : Accumulator := 0; begin for Y in First_Y .. Last_Y loop Yw := (if Y = First_Y then Accumulator (First_Yw) elsif Y = Last_Y then Accumulator (Last_Yw) else Accumulator (New_Height)); for X in First_X .. Last_X loop Xw := (if X = First_X then Accumulator (First_Xw) elsif X = Last_X then Accumulator (Last_Xw) else Accumulator (New_Width)); W := Yw * Xw; Acc_W := Acc_W + W; Acc := Acc + W * Accumulator (Ptr (Old_Plane.Data, X, Y, Old_Width).all); end loop; end loop; Acc := (Acc + Acc_W / 2) / Acc_W; Ptr (New_Plane.Data, New_X, New_Y, New_Width).all := C.unsigned_char (Acc); end; end loop; end loop; end Resize_Plane; procedure Update_Description (Process : in out Process_Description; Context : in Natools.Meaningless_Type; Name : in Sx.Atom; Arguments : in out Sx.Lockable.Descriptor'Class) is pragma Unreferenced (Context); use type Sx.Events.Event; use Description_Elements; Element : Description_Elements.Enum := Unknown; begin begin Element := Description_IO.Value (Name); exception when Constraint_Error => null; end; case Element is when Unknown => Natools.Web.Log (Natools.Web.Severities.Error, "Unknown photo process description element """ & Sx.To_String (Name) & '"'); when Max_Width => if Arguments.Current_Event = Sx.Events.Add_Atom then begin Process.Max_Width := Natural'Value (Sx.To_String (Arguments.Current_Atom)); exception when Constraint_Error => Process.Max_Width := 0; end; else Process.Max_Width := 0; end if; when Max_Height => if Arguments.Current_Event = Sx.Events.Add_Atom then begin Process.Max_Height := Natural'Value (Sx.To_String (Arguments.Current_Atom)); exception when Constraint_Error => Process.Max_Height := 0; end; else Process.Max_Height := 0; end if; when Quality => if Arguments.Current_Event = Sx.Events.Add_Atom then begin Process.Quality := Natural'Value (Sx.To_String (Arguments.Current_Atom)); exception when Constraint_Error => Process.Quality := 0; end; else Process.Quality := 0; end if; when Path => if Arguments.Current_Event = Sx.Events.Add_Atom then Process.Path := Sx.Atom_Ref_Constructors.Create (Arguments.Current_Atom); else Process.Path.Reset; end if; when Prefix => if Arguments.Current_Event = Sx.Events.Add_Atom then Process.Prefix := Sx.Atom_Ref_Constructors.Create (Arguments.Current_Atom); else Process.Prefix.Reset; end if; when Suffix => if Arguments.Current_Event = Sx.Events.Add_Atom then Process.Suffix := Sx.Atom_Ref_Constructors.Create (Arguments.Current_Atom); else Process.Suffix.Reset; end if; end case; end Update_Description; procedure Write (File_Name : in String; Image : in Image_Data; Quality : in Natural) is use type C.int; Handle : constant TurboJPEG_Thin.Handle := TurboJPEG_Thin.Init_Compress; Buf : Buffer := (Ada.Finalization.Limited_Controlled with Data => null, Size => 0); Result : C.int; begin Result := TurboJPEG_Thin.Compress_From_YUV_Planes (Handle, +Image.Planes, C.int (Image.Width), (others => 0), C.int (Image.Height), Image.Sub_Samp, Buf.Data, Buf.Size, C.int (Quality), TurboJPEG_Thin.Value (TurboJPEG_Thin.Progressive)); pragma Assert (Result = 0); declare use type TurboJPEG_Thin.Bytes.Pointer; use type C.unsigned_long; File : Ada.Streams.Stream_IO.File_Type; begin Ada.Streams.Stream_IO.Create (File, Ada.Streams.Stream_IO.Append_File, File_Name, ""); for I in 0 .. Buf.Size - 1 loop Ada.Streams.Stream_IO.Write (File, (1 => Ada.Streams.Stream_Element (TurboJPEG_Thin.Bytes.Pointer'(Buf.Data + C.ptrdiff_t (I)).all))); end loop; Ada.Streams.Stream_IO.Close (File); end; exception when others => Result := TurboJPEG_Thin.Destroy (Handle); raise; end Write; ---------------------- -- Public Interface -- ---------------------- function Create (Arguments : in out Sx.Lockable.Descriptor'Class) return Process_Description is Result : Process_Description; begin Read_Description (Arguments, Result, Natools.Meaningless_Value); return Result; end Create; function Create (File_Name : in String; Orientation : in Orientations.Enum) return Image is Data : Data_Refs.Data_Access; Ref : Data_Refs.Immutable_Reference; begin Load_Image : declare use type C.int; Handle : constant TurboJPEG_Thin.Handle := TurboJPEG_Thin.Init_Decompress; Jpeg : constant Buffer := Create (File_Name); W, H, SS, CS, Result : C.int; begin Result := TurboJPEG_Thin.Decompress_Header (Handle, Jpeg.Data, Jpeg.Size, W, H, SS, CS); pragma Assert (Result = 0); Data := new Image_Data'(Create (Positive (W), Positive (H), SS)); Ref := Data_Refs.Create (Data); Result := TurboJPEG_Thin.Decompress_To_YUV_Planes (Handle, Jpeg.Data, Jpeg.Size, +Data.Planes, W, (others => 0), H, 0); pragma Assert (Result = 0); Result := TurboJPEG_Thin.Destroy (Handle); pragma Assert (Result = 0); end Load_Image; return Image'(Ref => Adjust_Orientation (Ref, Orientation)); end Create; procedure Run (Object : in Image; Base_Name : in String; Description : in Process_Description) is Input : constant Data_Refs.Accessor := Object.Ref.Query; Resize_Num, Resize_Denom : Natural := 0; Output : Data_Refs.Immutable_Reference := Object.Ref; begin if Description.Max_Width > 0 then if Description.Max_Height > 0 then if Description.Max_Width * Input.Height > Description.Max_Height * Input.Width then -- Max_Width / Width > Max_Height / Height Resize_Num := Description.Max_Height; Resize_Denom := Input.Height; else Resize_Num := Description.Max_Width; Resize_Denom := Input.Width; end if; else Resize_Num := Description.Max_Width; Resize_Denom := Input.Width; end if; elsif Description.Max_Height > 0 then Resize_Num := Description.Max_Height; Resize_Denom := Input.Height; end if; if Resize_Num > 0 and Resize_Denom > 0 then declare New_Height : constant Positive := (Input.Height * Resize_Num + Resize_Denom / 2) / Resize_Denom; New_Width : constant Positive := (Input.Width * Resize_Num + Resize_Denom / 2) / Resize_Denom; begin Output := Resize_Image (Input, New_Width, New_Height); end; end if; Write (File_Name => To_String (Description.Path) & To_String (Description.Prefix) & Base_Name & To_String (Description.Suffix, ".jpg"), Image => Output.Query, Quality => Description.Quality); end Run; function Create (Size : in Interfaces.C.int) return Buffer is use type TurboJPEG_Thin.Bytes.Pointer; Data : constant TurboJPEG_Thin.Bytes.Pointer := TurboJPEG_Thin.Alloc (Size); begin if Data = null then raise Storage_Error with "Unable to allocate" & Size'Img & " bytes of TurboJPEG buffer"; end if; return Buffer'(Ada.Finalization.Limited_Controlled with Data => Data, Size => C.unsigned_long (Size)); end Create; function Create (File_Name : in String) return Buffer is Reader : constant Sx.File_Readers.Atom_Reader := Sx.File_Readers.Reader (File_Name); begin return Result : Buffer := Create (C.int (Reader.Length)) do declare Index : C.ptrdiff_t := 0; procedure Save_Block (Block : in Sx.Atom); procedure Save_Block (Block : in Sx.Atom) is use type C.ptrdiff_t; use type TurboJPEG_Thin.Bytes.Pointer; P : TurboJPEG_Thin.Bytes.Pointer; begin for B of Block loop P := Result.Data + Index; P.all := C.unsigned_char (B); Index := Index + 1; end loop; end Save_Block; begin Reader.Block_Query (1024, Save_Block'Access); end; end return; end Create; overriding procedure Finalize (Self : in out Buffer) is begin TurboJPEG_Thin.Free (Self.Data); Self.Data := null; end Finalize; end Lithium.Photo_Process; |
Added src/lithium-photo_process.ads.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | ------------------------------------------------------------------------------ -- Copyright (c) 2019, Natacha Porté -- -- -- -- Permission to use, copy, modify, and distribute this software for any -- -- purpose with or without fee is hereby granted, provided that the above -- -- copyright notice and this permission notice appear in all copies. -- -- -- -- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES -- -- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF -- -- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR -- -- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES -- -- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN -- -- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF -- -- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. -- ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ -- Lithium.Photo_Process provides a programmable processor for JPEG images. -- ------------------------------------------------------------------------------ with Natools.S_Expressions.Lockable; private with Ada.Finalization; private with Interfaces.C; private with Natools.References; private with Natools.S_Expressions.Atom_Refs; private with Natools.Storage_Pools; private with TurboJPEG_Thin; package Lithium.Photo_Process is package Sx renames Natools.S_Expressions; type Process_Description is private; function Create (Arguments : in out Sx.Lockable.Descriptor'Class) return Process_Description; package Orientations is type Enum is (Top_Left, Top_Right, Bottom_Right, Bottom_Left, Left_Top, Right_Top, Right_Bottom, Left_Bottom); end Orientations; type Image is tagged private; function Create (File_Name : in String; Orientation : in Orientations.Enum) return Image; procedure Run (Object : in Image; Base_Name : in String; Description : in Process_Description); private type Process_Description is record Max_Width : Natural := 0; Max_Height : Natural := 0; Quality : Natural := 85; Path : Sx.Atom_Refs.Immutable_Reference; Prefix : Sx.Atom_Refs.Immutable_Reference; Suffix : Sx.Atom_Refs.Immutable_Reference; end record; type Buffer is new Ada.Finalization.Limited_Controlled with record Data : TurboJPEG_Thin.Bytes.Pointer := null; Size : Interfaces.C.unsigned_long := 0; end record; function Create (Size : in Interfaces.C.int) return Buffer; function Create (File_Name : in String) return Buffer; overriding procedure Finalize (Self : in out Buffer); function Plane_Size (Label : in TurboJPEG_Thin.Plane_Label; Width, Height : in Positive; Sub_Samp : in Interfaces.C.int) return Interfaces.C.unsigned_long is (TurboJPEG_Thin.Plane_Size_YUV (TurboJPEG_Thin.Plane_Label'Pos (Label), Interfaces.C.int (Width), 0, -- Stride Interfaces.C.int (Height), Sub_Samp)); function Create (Label : in TurboJPEG_Thin.Plane_Label; Width, Height : in Positive; Sub_Samp : in Interfaces.C.int) return Buffer is (Create (Interfaces.C.int (Plane_Size (Label, Width, Height, Sub_Samp)))); type Planes_Buffer is array (TurboJPEG_Thin.Plane_Label) of Buffer; function "+" (Buffer : Planes_Buffer) return TurboJPEG_Thin.Planes_Buffer is ((TurboJPEG_Thin.Y => Buffer (TurboJPEG_Thin.Y).Data, TurboJPEG_Thin.Cb => Buffer (TurboJPEG_Thin.Cb).Data, TurboJPEG_Thin.Cr => Buffer (TurboJPEG_Thin.Cr).Data)); type Image_Data is limited record Width : Positive; Height : Positive; Sub_Samp : Interfaces.C.int; Planes : Planes_Buffer; end record; function Create (Width, Height : in Positive; Sub_Samp : in Interfaces.C.int) return Image_Data is (Width => Width, Height => Height, Sub_Samp => Sub_Samp, Planes => (TurboJPEG_Thin.Y => Create (TurboJPEG_Thin.Y, Width, Height, Sub_Samp), TurboJPEG_Thin.Cb => Create (TurboJPEG_Thin.Cb, Width, Height, Sub_Samp), TurboJPEG_Thin.Cr => Create (TurboJPEG_Thin.Cr, Width, Height, Sub_Samp))); package Data_Refs is new Natools.References (Image_Data, Natools.Storage_Pools.Access_In_Default_Pool'Storage_Pool, Natools.Storage_Pools.Access_In_Default_Pool'Storage_Pool); type Image is tagged record Ref : Data_Refs.Immutable_Reference; end record; end Lithium.Photo_Process; |