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-- Programmed by Jedidiah Barber
-- Released into the public domain
pragma Ada_2012;
private with
Ada.Finalization,
Interfaces.C.Strings,
System.Storage_Elements;
package Portaudio is
---------------------------------
-- Data Types and Structures --
---------------------------------
type Version_Number is record
Major : Natural;
Minor : Natural;
Subminor : Natural;
end record;
function "<"
(A, B : in Version_Number)
return Boolean;
function Image
(Num : in Version_Number)
return String;
type Version_Info is tagged private;
function Major
(Version : in Version_Info)
return Natural;
function Minor
(Version : in Version_Info)
return Natural;
function Subminor
(Version : in Version_Info)
return Natural;
function Revision
(Version : in Version_Info)
return String;
function Text
(Version : in Version_Info)
return String;
type Host_API_Kind is
(In_Development,
Direct_Sound_Host,
MME_Host,
ASIO_Host,
Sound_Manager_Host,
Core_Audio_Host,
OSS_Host,
ALSA_Host,
AL_Host,
BeOS_Host,
WDMKS_Host,
JACK_Host,
WASAPI_Host,
Audio_Science_HPI_Host,
Sndio_Host);
type Host_API_Index is new Positive;
type Device_Index is new Natural;
No_Device : constant Device_Index;
type Time is delta 10.0**(-4) digits 12;
function Image
(Num : in Time)
return String;
subtype Hertz is Long_Float
with Static_Predicate => Hertz >= 0.0;
function Hertz_Image
(Num : in Hertz)
return String;
subtype Load is Long_Float
with Static_Predicate => Load >= 0.0;
function Load_Image
(Num : in Load)
return String;
------------------
-- Exceptions --
------------------
Not_Initialized_Error : exception;
Unanticipated_Host_Error : exception;
Invalid_Channel_Count_Error : exception;
Invalid_Sample_Rate_Error : exception;
Invalid_Device_Error : exception;
Invalid_Flag_Error : exception;
Sample_Format_Not_Supported_Error : exception;
Bad_IO_Device_Combination_Error : exception;
Buffer_Too_Big_Error : exception;
Buffer_Too_Small_Error : exception;
Null_Callback_Error : exception;
Bad_Stream_Pointer_Error : exception;
Timed_Out_Error : exception;
Internal_Error : exception;
Device_Unavailable_Error : exception;
Incompatible_Host_API_Specific_Stream_Info_Error : exception;
Stream_Is_Stopped_Error : exception;
Stream_Is_Not_Stopped_Error : exception;
Input_Overflowed_Error : exception;
Output_Underflowed_Error : exception;
Host_API_Not_Found_Error : exception;
Invalid_Host_API_Error : exception;
Can_Not_Read_From_A_Callback_Stream_Error : exception;
Can_Not_Write_To_A_Callback_Stream_Error : exception;
Can_Not_Read_From_An_Output_Only_Stream_Error : exception;
Can_Not_Write_To_An_Input_Only_Stream_Error : exception;
Incompatible_Stream_Host_API_Error : exception;
Bad_Buffer_Pointer_Error : exception;
Can_Not_Initialize_Recursively_Error : exception;
General_Failure : exception;
-----------------------
-- API Subprograms --
-----------------------
function Get_Version
return Version_Number;
function Get_Version_Info
return Version_Info;
private
package Storage renames System.Storage_Elements;
use type Interfaces.C.size_t, Storage.Integer_Address;
Null_Pointer : constant Storage.Integer_Address := Storage.To_Integer (System.Null_Address);
pragma Linker_Options ("-lportaudio");
function c_pointer_size
return Interfaces.C.size_t;
pragma Import (C, c_pointer_size, "c_pointer_size");
-- If this fails then we are on an architecture that for whatever reason
-- has significant problems interfacing between C and Ada
pragma Assert
(c_pointer_size * Interfaces.C.CHAR_BIT = Storage.Integer_Address'Size,
"Size of C void pointers and size of Ada address values do not match");
type C_Version_Info is record
My_Major : Interfaces.C.int;
My_Minor : Interfaces.C.int;
My_Subminor : Interfaces.C.int;
My_Revision : Interfaces.C.Strings.chars_ptr;
My_Text : Interfaces.C.Strings.chars_ptr;
end record with Convention => C;
type Version_Info is tagged record
Ptr : System.Address;
end record;
type C_Host_Error_Info is record
My_Host_API_Type : Interfaces.C.int;
My_Error_Code : Interfaces.C.long;
My_Error_Text : Interfaces.C.Strings.chars_ptr;
end record with Convention => C;
No_Device : constant Device_Index := 0;
pa_no_error : constant Interfaces.C.int;
pragma Import (C, pa_no_error, "pa_no_error");
procedure Raise_Error
(Num : in Interfaces.C.int);
function To_Hat_Kind
(Num : in Interfaces.C.int)
return Host_API_Kind;
function To_Cint
(Ident : in Host_API_Kind)
return Interfaces.C.int;
-- The clunky way of ensuring that PortAudio is always shut down properly
type Final_Controller is new Ada.Finalization.Controlled with null record;
overriding procedure Finalize
(This : in out Final_Controller);
Cleanup : Final_Controller;
end Portaudio;
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