feat: Intel HDA audio driver, audio streaming syscalls, userspace Music app, fixes and improvements, rudimentary Bluetooth support

programs/src/music/Makefile

@@ -0,0 +1,87 @@
+# Makefile for music (standalone Music Player) on MontaukOS
+# Copyright (c) 2026 Daniel Hammer
+
+MAKEFLAGS += -rR
+.SUFFIXES:
+
+# ---- Toolchain ----
+
+TOOLCHAIN_PREFIX := $(shell cd ../../.. && pwd)/toolchain/local/bin/x86_64-elf-
+ifneq ($(wildcard $(TOOLCHAIN_PREFIX)gcc),)
+    CXX := $(TOOLCHAIN_PREFIX)g++
+else
+    CXX := g++
+endif
+
+# ---- Paths ----
+
+PROG_INC := ../../include
+LINK_LD  := ../../link.ld
+BINDIR   := ../../bin
+OBJDIR   := obj
+LIBDIR   := ../../lib
+
+# ---- Compiler flags ----
+
+CXXFLAGS := \
+    -std=gnu++20 \
+    -g -O2 -pipe \
+    -Wall \
+    -Wextra \
+    -Wno-unused-parameter \
+    -Wno-unused-function \
+    -nostdinc \
+    -ffreestanding \
+    -fno-stack-protector \
+    -fno-stack-check \
+    -fno-PIC \
+    -fno-rtti \
+    -fno-exceptions \
+    -ffunction-sections \
+    -fdata-sections \
+    -m64 \
+    -march=x86-64 \
+    -msse \
+    -msse2 \
+    -mno-red-zone \
+    -mcmodel=small \
+    -I $(PROG_INC) \
+    -I . \
+    -isystem $(PROG_INC)/libc \
+    -isystem ../../../kernel/freestnd-c-hdrs/x86_64/include \
+    -isystem ../../../kernel/freestnd-cxx-hdrs/x86_64/include
+
+# ---- Linker flags ----
+
+LDFLAGS := \
+    -nostdlib \
+    -static \
+    -Wl,--build-id=none \
+    -Wl,--gc-sections \
+    -Wl,-m,elf_x86_64 \
+    -z max-page-size=0x1000 \
+    -T $(LINK_LD)
+
+# ---- Source files ----
+
+SRCS := main.cpp minimp3_impl.cpp stb_truetype_impl.cpp
+OBJS := $(addprefix $(OBJDIR)/,$(SRCS:.cpp=.o))
+
+# ---- Target ----
+
+TARGET := $(BINDIR)/apps/music/music.elf
+
+.PHONY: all clean
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS) $(LINK_LD) Makefile
+	mkdir -p $(BINDIR)/apps/music
+	$(CXX) $(CXXFLAGS) $(LDFLAGS) $(OBJS) $(LIBDIR)/libc/liblibc.a -o $@
+
+$(OBJDIR)/%.o: %.cpp Makefile
+	mkdir -p $(OBJDIR)
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+clean:
+	rm -rf $(OBJDIR) $(TARGET)

programs/src/music/manifest.toml

@@ -0,0 +1,8 @@
+[app]
+name = "Music"
+binary = "music.elf"
+icon = "audio-player.svg"
+
+[menu]
+category = "Applications"
+visible = true

programs/src/music/minimp3_impl.cpp

@@ -0,0 +1,16 @@
+/*
+ * minimp3_impl.cpp
+ * Single compilation unit for minimp3 in MontaukOS freestanding environment
+ * Copyright (c) 2026 Daniel Hammer
+ */
+
+#include <cstdint>
+#include <cstddef>
+
+extern "C" {
+#include <string.h>
+#include <stdlib.h>
+}
+
+#define MINIMP3_IMPLEMENTATION
+#include "minimp3.h"

programs/src/music/stb_truetype_impl.cpp

@@ -0,0 +1,35 @@
+/*
+ * stb_truetype_impl.cpp
+ * Single compilation unit for stb_truetype in MontaukOS freestanding environment
+ * Copyright (c) 2026 Daniel Hammer
+ */
+
+#include <cstdint>
+#include <cstddef>
+#include <montauk/heap.h>
+#include <montauk/string.h>
+#include <gui/stb_math.h>
+
+// Override all stb_truetype dependencies before including the implementation
+
+#define STBTT_ifloor(x)   ((int) stb_floor(x))
+#define STBTT_iceil(x)    ((int) stb_ceil(x))
+#define STBTT_sqrt(x)     stb_sqrt(x)
+#define STBTT_pow(x,y)    stb_pow(x,y)
+#define STBTT_fmod(x,y)   stb_fmod(x,y)
+#define STBTT_cos(x)      stb_cos(x)
+#define STBTT_acos(x)     stb_acos(x)
+#define STBTT_fabs(x)     stb_fabs(x)
+
+#define STBTT_malloc(x,u)  ((void)(u), montauk::malloc(x))
+#define STBTT_free(x,u)    ((void)(u), montauk::mfree(x))
+
+#define STBTT_memcpy(d,s,n) montauk::memcpy(d,s,n)
+#define STBTT_memset(d,v,n) montauk::memset(d,v,n)
+
+#define STBTT_strlen(x)    montauk::slen(x)
+
+#define STBTT_assert(x)    ((void)(x))
+
+#define STB_TRUETYPE_IMPLEMENTATION
+#include <gui/stb_truetype.h>