Move storable buffer format info to a separate source

2 files changed, 70 insertions, 0 deletions

diff --git a/alc/buffer_formats.cpp b/alc/buffer_formats.cpp
new file mode 100644
index 00000000..7ee4bfc8
--- /dev/null
+++ b/alc/buffer_formats.cpp
@@ -0,0 +1,37 @@
+
+#include "config.h"
+
+#include "buffer_formats.h"
+
+#include <cstdint>
+
+
+ALuint BytesFromFmt(FmtType type) noexcept
+{
+    switch(type)
+    {
+    case FmtUByte: return sizeof(uint8_t);
+    case FmtShort: return sizeof(int16_t);
+    case FmtFloat: return sizeof(float);
+    case FmtDouble: return sizeof(double);
+    case FmtMulaw: return sizeof(uint8_t);
+    case FmtAlaw: return sizeof(uint8_t);
+    }
+    return 0;
+}
+ALuint ChannelsFromFmt(FmtChannels chans, ALuint ambiorder) noexcept
+{
+    switch(chans)
+    {
+    case FmtMono: return 1;
+    case FmtStereo: return 2;
+    case FmtRear: return 2;
+    case FmtQuad: return 4;
+    case FmtX51: return 6;
+    case FmtX61: return 7;
+    case FmtX71: return 8;
+    case FmtBFormat2D: return (ambiorder*2) + 1;
+    case FmtBFormat3D: return (ambiorder+1) * (ambiorder+1);
+    }
+    return 0;
+}
diff --git a/alc/buffer_formats.h b/alc/buffer_formats.h
new file mode 100644
index 00000000..b10cea4c
--- /dev/null
+++ b/alc/buffer_formats.h
@@ -0,0 +1,33 @@
+#ifndef ALC_BUFFER_FORMATS_H
+#define ALC_BUFFER_FORMATS_H
+
+#include "AL/al.h"
+
+
+/* Storable formats */
+enum FmtType : unsigned char {
+    FmtUByte,
+    FmtShort,
+    FmtFloat,
+    FmtDouble,
+    FmtMulaw,
+    FmtAlaw,
+};
+enum FmtChannels : unsigned char {
+    FmtMono,
+    FmtStereo,
+    FmtRear,
+    FmtQuad,
+    FmtX51, /* (WFX order) */
+    FmtX61, /* (WFX order) */
+    FmtX71, /* (WFX order) */
+    FmtBFormat2D,
+    FmtBFormat3D,
+};
+
+ALuint BytesFromFmt(FmtType type) noexcept;
+ALuint ChannelsFromFmt(FmtChannels chans, ALuint ambiorder) noexcept;
+inline ALuint FrameSizeFromFmt(FmtChannels chans, FmtType type, ALuint ambiorder) noexcept
+{ return ChannelsFromFmt(chans, ambiorder) * BytesFromFmt(type); }
+
+#endif /* ALC_BUFFER_FORMATS_H */