add: Implementation of sdhd module

Author: uyjulian

iop/sound/sdhd/Makefile

@@ -0,0 +1,20 @@
+# _____     ___ ____     ___ ____
+#  ____|   |    ____|   |        | |____|
+# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
+#-----------------------------------------------------------------------
+# Copyright ps2dev - http://www.ps2dev.org
+# Licenced under Academic Free License version 2.0
+# Review ps2sdk README & LICENSE files for further details.
+
+IOP_BIN ?= sdhd.irx
+
+IOP_IMPORT_INCS += \
+	system/intrman \
+	system/loadcore
+
+IOP_OBJS = sdhd.o exports.o imports.o
+
+include $(PS2SDKSRC)/Defs.make
+include $(PS2SDKSRC)/iop/Rules.bin.make
+include $(PS2SDKSRC)/iop/Rules.make
+include $(PS2SDKSRC)/iop/Rules.release

iop/sound/sdhd/README.md

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+# Sound data (HD file) access library
+
+This module provides functions to access sound banks stored in HD files.
+
+## Configurations
+
+There are multiple configurations of this library, allowing the choice of
+balancing between size, speed, and features.
+
+*   `sdhd` -> The recommended version.
+
+## How to use this module in your program
+
+In order to use this module in your program, use `LoadModule` or \
+`LoadModuleBuffer` with no arguments.