0xrsydn/gameboy-rust
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feat(audio): implement nominal Direct Sound playback and FIFO DMA

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0xrsydn 2026-10-07 01:35:55 +07:00
commit 5888c4d292
21 changed files with 933 additions and 129 deletions
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19
crates/gba-core/tests/inactive_devices.rs
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@ -38,7 +38,7 @@ fn disabled_sound_registers_masks_lanes_and_wave_ram() {
assert_eq!(bus.read16(SOUNDCNT_H).unwrap(), 0x7700);
assert_eq!(bus.read16(SOUNDBIAS).unwrap(), 0xc3fe);
// FIFOs are not ordinary register latches.
assert!(bus.write32(0x040000a0, 0).is_err());
bus.write32(0x040000a0, 0).unwrap();
assert!(bus.read32(0x040000a0).is_err());
}
@ -80,7 +80,6 @@ fn idle_normal_serial_data_and_control_have_distinct_widths() {
fn unsupported_operations_have_specific_retryable_diagnostics() {
let mut bus = memory();
for (address, value, description) in [
(SOUNDCNT_X, 0x80, "sound master enable"),
(SIOCNT, 0x80, "serial transfer start"),
(SIOCNT + 1, 0x20, "multiplayer/UART"),
(RCNT + 1, 0x40, "Joybus serial mode"),
@ -105,9 +104,10 @@ fn unsupported_operations_have_specific_retryable_diagnostics() {
#[test]
fn block_store_rejects_later_activation_before_earlier_control_writes() {
let code: [u32; 7] = [
0xe3a00301, 0xe2800080, 0xe59f1008, 0xe3a02080, 0xe8a00006, 0xeafffffe, 0x770f0000,
0xe3a00301, 0xe2800060, 0xe59f1008, 0xe3a02902, 0xe8a00006, 0xeafffffe, 0x12345678,
];
let bus = Memory::new(code.into_iter().flat_map(u32::to_le_bytes).collect()).unwrap();
let mut bus = Memory::new(code.into_iter().flat_map(u32::to_le_bytes).collect()).unwrap();
bus.write16(SOUNDCNT_X, 0x80).unwrap();
let mut machine = Machine::new(Cpu::new(ROM_START), bus);
for _ in 0..4 {
machine.step().unwrap();
@ -115,24 +115,25 @@ fn block_store_rejects_later_activation_before_earlier_control_writes() {
let before = machine.cpu().clone();
let cycles = machine.cycles();
let error = machine.step().unwrap_err();
assert!(error.to_string().contains("sound master enable"));
assert!(error.to_string().contains("PSG channel trigger"));
assert_eq!(machine.cpu(), &before);
assert_eq!(machine.cycles(), cycles);
assert_eq!(machine.memory().read16(SOUNDCNT_H).unwrap(), 0);
assert_eq!(machine.memory().read16(0x04000060).unwrap(), 0);
assert_eq!(machine.step(), Err(error));
}
#[test]
fn dma_activation_error_preserves_channel_progress_and_clocks() {
let mut bus = memory();
bus.write32(0x02000000, 0x80).unwrap();
bus.write16(SOUNDCNT_X, 0x80).unwrap();
bus.write32(0x02000000, 0x8000).unwrap();
bus.write32(DMA_BASE, 0x02000000).unwrap();
bus.write32(DMA_BASE + 4, SOUNDCNT_X).unwrap();
bus.write32(DMA_BASE + 4, 0x04000064).unwrap();
bus.write32(DMA_BASE + 8, 0x84000001).unwrap();
let mut machine = Machine::new(Cpu::new(ROM_START), bus);
let before = machine.cpu().clone();
let error = machine.step().unwrap_err();
assert!(error.to_string().contains("sound master enable"));
assert!(error.to_string().contains("PSG channel trigger"));
assert_eq!(machine.cycles(), 0);
assert_eq!(machine.cpu(), &before);
assert_eq!(machine.step(), Err(error));