diff options
Diffstat (limited to 'example')
| -rw-r--r-- | example/file_info_example.adb | 70 | ||||
| -rw-r--r-- | example/virtual_io_example.adb | 165 |
2 files changed, 235 insertions, 0 deletions
diff --git a/example/file_info_example.adb b/example/file_info_example.adb new file mode 100644 index 0000000..3971163 --- /dev/null +++ b/example/file_info_example.adb @@ -0,0 +1,70 @@ + + +-- Programmed by Jedidiah Barber +-- Released into the public domain + +-- This program opens the file supplied as a command line argument, outputs the +-- file info from it, then closes the file. No modifications are made. + + +with + + Ada.Command_Line, + Ada.Directories, + Ada.Text_IO, + Libsndfile; + + +procedure File_Info_Example is + + + package ACom renames Ada.Command_Line; + package ADir renames Ada.Directories; + package TIO renames Ada.Text_IO; + + + My_Info : Libsndfile.File_Info := Libsndfile.Blank_Info; + My_Sound_File : Libsndfile.Sound_File; + + +begin + + + if ACom.Argument_Count < 1 then + TIO.Put_Line ("No filename provided"); + ACom.Set_Exit_Status (ACom.Failure); + return; + end if; + + if not ADir.Exists (ACom.Argument (1)) then + TIO.Put_Line ("File does not exist"); + ACom.Set_Exit_Status (ACom.Failure); + return; + end if; + + + TIO.Put_Line ("Load file " & ACom.Argument (1)); + My_Sound_File.Open (ACom.Argument (1), Libsndfile.Read_Only, My_Info); + TIO.New_Line; + + TIO.Put_Line ("Open frame count:" & + Libsndfile.Count_Type'Image (Libsndfile.Frames (My_Info))); + TIO.Put_Line ("Open sample rate:" & Natural'Image (Libsndfile.Rate (My_Info))); + TIO.Put_Line ("Open channel count:" & Natural'Image (Libsndfile.Channels (My_Info))); + TIO.Put_Line ("Open major format: " & + Libsndfile.Major_Format'Image (Libsndfile.Major (My_Info))); + TIO.Put_Line ("Open minor format: " & + Libsndfile.Minor_Format'Image (Libsndfile.Minor (My_Info))); + TIO.Put_Line ("Open endianness: " & + Libsndfile.Endianness'Image (Libsndfile.Endian (My_Info))); + TIO.Put_Line ("Open section count:" & Natural'Image (Libsndfile.Sections (My_Info))); + TIO.Put_Line ("Open seekable: " & Boolean'Image (Libsndfile.Seekable (My_Info))); + + TIO.New_Line; + My_Sound_File.Close; + TIO.Put_Line ("File closed"); + + +end File_Info_Example; + + diff --git a/example/virtual_io_example.adb b/example/virtual_io_example.adb new file mode 100644 index 0000000..8953c07 --- /dev/null +++ b/example/virtual_io_example.adb @@ -0,0 +1,165 @@ + + +-- Programmed by Jedidiah Barber +-- Released into the public domain + +-- This program opens the file supplied as a command line argument. Except +-- rather than the usual libsndfile open procedure, it uses the standard Ada +-- library and libsndfile's virtual open. Then the program outputs the file +-- info and closes the file. No modifications are made. + + +with + + Ada.Command_Line, + Ada.Directories, + Ada.Direct_IO, + Ada.Text_IO, + Libsndfile.Virtual; + +use type + + Libsndfile.Count_Type; + + +procedure Virtual_IO_Example is + + + package ACom renames Ada.Command_Line; + package ADir renames Ada.Directories; + package DIO is new Ada.Direct_IO (Element_Type => Character); + package TIO renames Ada.Text_IO; + + + Virtual_File : DIO.File_Type; + Current_Offset : Libsndfile.Count_Type := 1; + + + function My_Length + return Libsndfile.Count_Type is + begin + return Libsndfile.Count_Type (DIO.Size (Virtual_File)); + end My_Length; + + function My_Seek + (Offset : in Libsndfile.Count_Type; + Whence : in Libsndfile.Seek_From) + return Libsndfile.Count_Type is + begin + case Whence is + when Libsndfile.From_Start => + Current_Offset := 1 + Offset; + when Libsndfile.From_Current => + Current_Offset := Current_Offset + Offset; + when Libsndfile.From_End => + Current_Offset := Libsndfile.Count_Type (DIO.Size (Virtual_File)) + Offset; + end case; + if Current_Offset < 1 or + Current_Offset > Libsndfile.Count_Type (DIO.Size (Virtual_File)) + then + Current_Offset := 1; + return -1; + else + return Current_Offset; + end if; + end My_Seek; + + function My_Read + (Data : out Libsndfile.Raw_Data; + Bytes : in Libsndfile.Count_Type) + return Libsndfile.Count_Type + is + Item : Character; + Data_Position : Integer := 1; + begin + while Current_Offset <= Libsndfile.Count_Type (DIO.Size (Virtual_File)) and + Data_Position - 1 < Integer (Bytes) + loop + DIO.Read (Virtual_File, Item, DIO.Count (Current_Offset)); + Data (Data_Position) := Item; + Current_Offset := Current_Offset + 1; + Data_Position := Data_Position + 1; + end loop; + return Libsndfile.Count_Type (Data_Position - 1); + end My_Read; + + function My_Write + (Data : in Libsndfile.Raw_Data; + Bytes : in Libsndfile.Count_Type) + return Libsndfile.Count_Type + is + Item : Character; + Data_Position : Integer := 1; + begin + while Current_Offset <= Libsndfile.Count_Type (DIO.Size (Virtual_File)) and + Data_Position - 1 < Integer (Bytes) + loop + Item := Data (Data_Position); + DIO.Write (Virtual_File, Item, DIO.Count (Current_Offset)); + Current_Offset := Current_Offset + 1; + Data_Position := Data_Position + 1; + end loop; + return Libsndfile.Count_Type (Data_Position - 1); + end My_Write; + + function My_Tell + return Libsndfile.Count_Type is + begin + return Current_Offset; + end My_Tell; + + + My_Info : Libsndfile.File_Info := Libsndfile.Blank_Info; + Test_File : Libsndfile.Virtual.Virtual_Sound_File; + + +begin + + + if ACom.Argument_Count < 1 then + TIO.Put_Line ("No filename provided"); + ACom.Set_Exit_Status (ACom.Failure); + return; + end if; + + if not ADir.Exists (ACom.Argument (1)) then + TIO.Put_Line ("File does not exist"); + ACom.Set_Exit_Status (ACom.Failure); + return; + end if; + + + TIO.Put_Line ("Load file " & ACom.Argument (1)); + DIO.Open (Virtual_File, DIO.In_File, ACom.Argument (1)); + Test_File.Open + (Libsndfile.Read_Only, + My_Info, + My_Length'Unrestricted_Access, + My_Seek'Unrestricted_Access, + My_Read'Unrestricted_Access, + My_Write'Unrestricted_Access, + My_Tell'Unrestricted_Access); + TIO.New_Line; + + TIO.Put_Line ("Open frame count:" & + Libsndfile.Count_Type'Image (Libsndfile.Frames (My_Info))); + TIO.Put_Line ("Open sample rate:" & Natural'Image (Libsndfile.Rate (My_Info))); + TIO.Put_Line ("Open channel count:" & Natural'Image (Libsndfile.Channels (My_Info))); + TIO.Put_Line ("Open major format: " & + Libsndfile.Major_Format'Image (Libsndfile.Major (My_Info))); + TIO.Put_Line ("Open minor format: " & + Libsndfile.Minor_Format'Image (Libsndfile.Minor (My_Info))); + TIO.Put_Line ("Open endianness: " & + Libsndfile.Endianness'Image (Libsndfile.Endian (My_Info))); + TIO.Put_Line ("Open section count:" & Natural'Image (Libsndfile.Sections (My_Info))); + TIO.Put_Line ("Open seekable: " & Boolean'Image (Libsndfile.Seekable (My_Info))); + + TIO.New_Line; + Test_File.Close; + DIO.Close (Virtual_File); + TIO.Put_Line ("File closed"); + + +end Virtual_IO_Example; + + |