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209 | ------------------------------------------------------------------------------
-- --
-- THIS IS AN AUTOMATICALLY GENERATED FILE! DO NOT EDIT! --
-- --
-- WAVEFILES --
-- --
-- Wavefile data I/O operations --
-- --
-- The MIT License (MIT) --
-- --
-- Copyright (c) 2015 -- 2021 Gustavo A. Hoffmann --
-- --
-- Permission is hereby granted, free of charge, to any person obtaining --
-- a copy of this software and associated documentation files (the --
-- "Software"), to deal in the Software without restriction, including --
-- without limitation the rights to use, copy, modify, merge, publish, --
-- distribute, sublicense, and / or sell copies of the Software, and to --
-- permit persons to whom the Software is furnished to do so, subject to --
-- the following conditions: --
-- --
-- The above copyright notice and this permission notice shall be --
-- included in all copies or substantial portions of the Software. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, --
-- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
-- IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY --
-- CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, --
-- TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE --
-- SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
------------------------------------------------------------------------------
package body Audio.Wavefiles.Generic_Fixed_Wav_IO is
procedure Read_Wav_Sample_Bytes
(File_Access : Ada.Streams.Stream_IO.Stream_Access;
Sample : out Wav_Sample)
with Inline;
procedure Write_Wav_Sample_Bytes
(File_Access : Ada.Streams.Stream_IO.Stream_Access;
Sample : Wav_Sample)
with Inline;
procedure Read_Wav_MC_Sample (WF : in out Wavefile;
Wav : out Wav_MC_Sample)
with Inline;
procedure Write_Wav_MC_Sample (WF : in out Wavefile;
Wav : Wav_MC_Sample)
with Inline;
---------------------------
-- Read_Wav_Sample_Bytes --
---------------------------
procedure Read_Wav_Sample_Bytes
(File_Access : Ada.Streams.Stream_IO.Stream_Access;
Sample : out Wav_Sample)
is
Bytes : Byte_Array (1 .. Sample'Size / 8)
with Address => Sample'Address, Import, Volatile;
Last_Valid_Byte : constant Long_Integer := Wav_Sample'Size / 8;
use type Byte;
begin
Byte_Array'Read (File_Access,
Bytes (1 .. Wav_Sample'Size / 8));
-- Account for sign bit in internal representation,
-- which might not match the wavefile representation.
if Sample'Size > Wav_Sample'Size then
Bytes (Last_Valid_Byte + 1 .. Bytes'Last) :=
(others => (if Bytes (Last_Valid_Byte) >= 16#80#
then 16#FF# else 16#00#));
end if;
end Read_Wav_Sample_Bytes;
----------------------------
-- Write_Wav_Sample_Bytes --
----------------------------
procedure Write_Wav_Sample_Bytes
(File_Access : Ada.Streams.Stream_IO.Stream_Access;
Sample : Wav_Sample)
is
Bytes : Byte_Array (1 .. Wav_Sample'Size / 8)
with Address => Sample'Address, Import, Volatile;
begin
Byte_Array'Write (File_Access, Bytes);
end Write_Wav_Sample_Bytes;
------------------------
-- Read_Wav_MC_Sample --
------------------------
procedure Read_Wav_MC_Sample
(WF : in out Wavefile;
Wav : out Wav_MC_Sample)
is
N_Ch : constant Positive := Number_Of_Channels (WF);
Sample : Wav_Sample;
use Ada.Streams.Stream_IO;
Prev_File_Index : constant Positive_Count := Index (WF.File)
with Ghost;
Expected_Byte_IO : constant Positive_Count
:= Positive_Count
(To_Positive (WF.Wave_Format.Bits_Per_Sample) * N_Ch / 8)
with Ghost;
begin
for J in Wav'Range loop
-- Patch for 24-bit wavefiles
if Wav_Sample'Size = 24 then
Read_Wav_Sample_Bytes (WF.File_Access, Sample);
else
Wav_Sample'Read (WF.File_Access, Sample);
end if;
Wav (J) := Sample;
if Ada.Streams.Stream_IO.End_Of_File (WF.File) and then
J < Wav'Last
then
-- Cannot read data for all channels
WF.Set_Error (Wavefile_Error_File_Too_Short);
end if;
end loop;
WF.Sample_Pos.Current := WF.Sample_Pos.Current + 1;
pragma Assert (Ada.Streams.Stream_IO.Index (WF.File) =
Prev_File_Index + Expected_Byte_IO);
end Read_Wav_MC_Sample;
-------------------------
-- Write_Wav_MC_Sample --
-------------------------
procedure Write_Wav_MC_Sample
(WF : in out Wavefile;
Wav : Wav_MC_Sample)
is
N_Ch : constant Positive := Number_Of_Channels (WF);
use Ada.Streams.Stream_IO;
Prev_File_Index : constant Positive_Count := Index (WF.File)
with Ghost;
Expected_Byte_IO : constant Positive_Count
:= Positive_Count
(To_Positive (WF.Wave_Format.Bits_Per_Sample) * N_Ch / 8)
with Ghost;
begin
if Wav_Sample'Size = 24 then
for Sample of Wav loop
Write_Wav_Sample_Bytes (WF.File_Access, Sample);
end loop;
else
Wav_MC_Sample'Write (WF.File_Access, Wav);
end if;
WF.Sample_Pos := (Total => WF.Sample_Pos.Total + 1,
Current => WF.Sample_Pos.Current + 1);
pragma Assert (Ada.Streams.Stream_IO.Index (WF.File) =
Prev_File_Index + Expected_Byte_IO);
end Write_Wav_MC_Sample;
---------
-- Get --
---------
function Get (WF : in out Wavefile) return Wav_MC_Sample
is
N_Ch : constant Positive := Number_Of_Channels (WF);
Channel_Range_Valid_Last : constant Channel_Range :=
Channel_Range'Val (N_Ch - 1
+ Channel_Range'Pos (Channel_Range'First));
subtype Valid_Channel_Range is Channel_Range range
Channel_Range'First .. Channel_Range_Valid_Last;
begin
return Wav : Wav_MC_Sample (Valid_Channel_Range) do
Read_Wav_MC_Sample (WF, Wav);
end return;
end Get;
---------
-- Get --
---------
procedure Get (WF : in out Wavefile;
Wav : out Wav_MC_Sample) is
begin
Read_Wav_MC_Sample (WF, Wav);
end Get;
---------
-- Put --
---------
procedure Put (WF : in out Wavefile;
Wav : Wav_MC_Sample) is
begin
Write_Wav_MC_Sample (WF, Wav);
end Put;
end Audio.Wavefiles.Generic_Fixed_Wav_IO;
|