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-- Programmed by Jedidiah Barber
-- Released into the public domain
pragma Ada_2012;
with
Interfaces.C.Strings,
System;
use type
Interfaces.C.int,
System.Address;
package body Portaudio.Devices is
------------------------
-- Constants From C --
------------------------
pa_no_device : constant Interfaces.C.int;
pragma Import (C, pa_no_device, "pa_no_device");
------------------------
-- Functions From C --
------------------------
function pa_get_host_api_count
return Interfaces.C.int;
pragma Import (C, pa_get_host_api_count, "Pa_GetHostApiCount");
function pa_get_default_host_api
return Interfaces.C.int;
pragma Import (C, pa_get_default_host_api, "Pa_GetDefaultHostApi");
function pa_get_host_api_info
(Index : in Interfaces.C.int)
return System.Address;
pragma Import (C, pa_get_host_api_info, "Pa_GetHostApiInfo");
function pa_host_api_type_id_to_host_api_index
(Kind : in Interfaces.C.int)
return Interfaces.C.int;
pragma Import (C, pa_host_api_type_id_to_host_api_index, "Pa_HostApiTypeIdToHostApiIndex");
function pa_host_api_device_index_to_device_index
(Host : in Interfaces.C.int;
Dev : in Interfaces.C.int)
return Interfaces.C.int;
pragma Import (C, pa_host_api_device_index_to_device_index,
"Pa_HostApiDeviceIndexToDeviceIndex");
function pa_get_device_count
return Interfaces.C.int;
pragma Import (C, pa_get_device_count, "Pa_GetDeviceCount");
function pa_get_default_input_device
return Interfaces.C.int;
pragma Import (C, pa_get_default_input_device, "Pa_GetDefaultInputDevice");
function pa_get_default_output_device
return Interfaces.C.int;
pragma Import (C, pa_get_default_output_device, "Pa_GetDefaultOutputDevice");
function pa_get_device_info
(Index : in Interfaces.C.int)
return System.Address;
pragma Import (C, pa_get_device_info, "Pa_GetDeviceInfo");
---------------------------------
-- Data Types and Structures --
---------------------------------
function Kind
(Info : in Host_API_Info)
return Host_API_Kind
is
Internal : C_Host_API_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return To_Hat_Kind (Internal.My_Host_API_Type);
end Kind;
function Name
(Info : in Host_API_Info)
return String
is
Internal : C_Host_API_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Interfaces.C.Strings.Value (Internal.My_Name);
end Name;
function Device_Count
(Info : in Host_API_Info)
return Natural
is
Internal : C_Host_API_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Natural (Internal.My_Device_Count);
end Device_Count;
function Default_Input_Device
(Info : in Host_API_Info)
return Device_Index
is
Internal : C_Host_API_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
if Internal.My_Default_Input = pa_no_device then
return No_Device;
else
return Device_Index (Internal.My_Default_Input) + 1;
end if;
end Default_Input_Device;
function Default_Output_Device
(Info : in Host_API_Info)
return Device_Index
is
Internal : C_Host_API_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
if Internal.My_Default_Output = pa_no_device then
return No_Device;
else
return Device_Index (Internal.My_Default_Output) + 1;
end if;
end Default_Output_Device;
function Name
(Info : in Device_Info)
return String
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Interfaces.C.Strings.Value (Internal.My_Name);
end Name;
function Host_API
(Info : in Device_Info)
return Host_API_Index
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Host_API_Index (Internal.My_Host_API_Index + 1);
end Host_API;
function Max_Input_Channels
(Info : in Device_Info)
return Natural
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Natural (Internal.My_Input_Channels);
end Max_Input_Channels;
function Max_Output_Channels
(Info : in Device_Info)
return Natural
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Natural (Internal.My_Output_Channels);
end Max_Output_Channels;
function Default_Low_Input_Latency
(Info : in Device_Info)
return Time
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Time (Internal.My_Low_Input_Latency);
end Default_Low_Input_Latency;
function Default_Low_Output_Latency
(Info : in Device_Info)
return Time
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Time (Internal.My_Low_Output_Latency);
end Default_Low_Output_Latency;
function Default_High_Input_Latency
(Info : in Device_Info)
return Time
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Time (Internal.My_High_Input_Latency);
end Default_High_Input_Latency;
function Default_High_Output_Latency
(Info : in Device_Info)
return Time
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Time (Internal.My_High_Output_Latency);
end Default_High_Output_Latency;
function Default_Sample_Rate
(Info : in Device_Info)
return Hertz
is
Internal : C_Device_Info;
for Internal'Address use Info.Ptr;
pragma Import (Ada, Internal);
begin
return Hertz (Internal.My_Sample_Rate);
end Default_Sample_Rate;
-----------------------
-- API Subprograms --
-----------------------
function Get_Host_API_Count
return Natural
is
Code : Interfaces.C.int;
begin
Code := pa_get_host_api_count;
if Code < 0 then
Raise_Error (Code);
raise Program_Error;
else
return Natural (Code);
end if;
end Get_Host_API_Count;
function Get_Default_Host_API
return Host_API_Index
is
Code : Interfaces.C.int;
begin
Code := pa_get_default_host_api;
if Code < 0 then
Raise_Error (Code);
raise Program_Error;
else
return Host_API_Index (Code) + 1;
end if;
end Get_Default_Host_API;
function Get_Host_API_Info
(Index : in Host_API_Index)
return Host_API_Info
is
Result : System.Address;
begin
Result := pa_get_host_api_info (Interfaces.C.int (Index) - 1);
if Result = System.Null_Address then
raise General_Failure;
else
return (Ptr => Result);
end if;
end Get_Host_API_Info;
function To_Host_API_Index
(Kind : in Host_API_Kind)
return Host_API_Index
is
Code : Interfaces.C.int;
begin
Code := pa_host_api_type_id_to_host_api_index (To_Cint (Kind));
if Code < 0 then
Raise_Error (Code);
raise Program_Error;
else
return Host_API_Index (Code) + 1;
end if;
end To_Host_API_Index;
function To_Device_Index
(Host_API : in Host_API_Index;
Host_Device : in Positive)
return Device_Index
is
Code : Interfaces.C.int;
begin
Code := pa_host_api_device_index_to_device_index
(Interfaces.C.int (Host_API) - 1,
Interfaces.C.int (Host_API) - 1);
if Code < 0 then
Raise_Error (Code);
raise Program_Error;
else
return Device_Index (Code + 1);
end if;
end To_Device_Index;
function Get_Device_Count
return Natural
is
Code : Interfaces.C.int;
begin
Code := pa_get_device_count;
if Code < 0 then
Raise_Error (Code);
raise Program_Error;
else
return Natural (Code);
end if;
end Get_Device_Count;
function Get_Default_Input_Device
return Device_Index
is
Code : Interfaces.C.int;
begin
Code := pa_get_default_input_device;
if Code = pa_no_device then
return No_Device;
else
return Device_Index (Code + 1);
end if;
end Get_Default_Input_Device;
function Get_Default_Output_Device
return Device_Index
is
Code : Interfaces.C.int;
begin
Code := pa_get_default_output_device;
if Code = pa_no_device then
return No_Device;
else
return Device_Index (Code + 1);
end if;
end Get_Default_Output_Device;
function Get_Device_Info
(Index : in Device_Index)
return Device_Info
is
Result : System.Address;
begin
Result := pa_get_device_info (Interfaces.C.int (Index) - 1);
if Result = System.Null_Address then
raise General_Failure;
else
return (Ptr => Result);
end if;
end Get_Device_Info;
end Portaudio.Devices;
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