diff options
Diffstat (limited to 'src/portaudio-streams.ads')
| -rw-r--r-- | src/portaudio-streams.ads | 58 |
1 files changed, 28 insertions, 30 deletions
diff --git a/src/portaudio-streams.ads b/src/portaudio-streams.ads index 1f14733..c8d3e92 100644 --- a/src/portaudio-streams.ads +++ b/src/portaudio-streams.ads @@ -37,12 +37,16 @@ package Portaudio.Streams is type Integer_24 is range -2 ** 23 .. 2 ** 23 - 1; for Integer_24'Size use 24; - type Float_32_Array is array (Positive range <>) of aliased Interfaces.IEEE_Float_32; - type Int_32_Array is array (Positive range <>) of aliased Interfaces.Integer_32; - type Int_24_Array is array (Positive range <>) of aliased Integer_24; - type Int_16_Array is array (Positive range <>) of aliased Interfaces.Integer_16; - type Int_8_Array is array (Positive range <>) of aliased Interfaces.Integer_8; - type UInt_8_Array is array (Positive range <>) of aliased Interfaces.Unsigned_8; + -- When declaring these arrays, ensure that the bounds are specified by the + -- initial value and not the subtype. Otherwise you will get subtype mismatch + -- errors due to the aliasing required by the Wrap functions further down. + -- No, I'm not a fan of this quirk of Ada either. + type Float_32_Array is array (Positive range <>) of Interfaces.IEEE_Float_32; + type Int_32_Array is array (Positive range <>) of Interfaces.Integer_32; + type Int_24_Array is array (Positive range <>) of Integer_24; + type Int_16_Array is array (Positive range <>) of Interfaces.Integer_16; + type Int_8_Array is array (Positive range <>) of Interfaces.Integer_8; + type UInt_8_Array is array (Positive range <>) of Interfaces.Unsigned_8; type Frame_Amount is new Interfaces.Unsigned_32; @@ -152,51 +156,45 @@ package Portaudio.Streams is Value : in Interfaces.Unsigned_8) with Pre => Store.Kind = UInt_8_Format; - -- !!! ENSURE STORE IS ALIASED !!! -- function Wrap - (Store : in Float_32_Array; - Frames : in Frame_Amount; - Channels : in Natural) + (Store : aliased in Float_32_Array; + Frames : in Frame_Amount; + Channels : in Natural) return Buffer with Pre => Store'Length > 0 and Store'Length = Frames * Frame_Amount (Channels); - -- !!! ENSURE STORE IS ALIASED !!! -- function Wrap - (Store : in Int_32_Array; - Frames : in Frame_Amount; - Channels : in Natural) + (Store : aliased in Int_32_Array; + Frames : in Frame_Amount; + Channels : in Natural) return Buffer with Pre => Store'Length > 0 and Store'Length = Frames * Frame_Amount (Channels); - -- !!! ENSURE STORE IS ALIASED !!! -- function Wrap - (Store : in Int_24_Array; - Frames : in Frame_Amount; - Channels : in Natural) + (Store : aliased in Int_24_Array; + Frames : in Frame_Amount; + Channels : in Natural) return Buffer with Pre => Store'Length > 0 and Store'Length = Frames * Frame_Amount (Channels); - -- !!! ENSURE STORE IS ALIASED !!! -- function Wrap - (Store : in Int_16_Array; - Frames : in Frame_Amount; - Channels : in Natural) + (Store : aliased in Int_16_Array; + Frames : in Frame_Amount; + Channels : in Natural) return Buffer with Pre => Store'Length > 0 and Store'Length = Frames * Frame_Amount (Channels); - -- !!! ENSURE STORE IS ALIASED !!! -- function Wrap - (Store : in Int_8_Array; - Frames : in Frame_Amount; - Channels : in Natural) + (Store : aliased in Int_8_Array; + Frames : in Frame_Amount; + Channels : in Natural) return Buffer with Pre => Store'Length > 0 and Store'Length = Frames * Frame_Amount (Channels); - -- !!! ENSURE STORE IS ALIASED !!! -- function Wrap - (Store : in UInt_8_Array; - Frames : in Frame_Amount; - Channels : in Natural) + (Store : aliased in UInt_8_Array; + Frames : in Frame_Amount; + Channels : in Natural) return Buffer with Pre => Store'Length > 0 and Store'Length = Frames * Frame_Amount (Channels); |