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revert(apu): switch from f32 44.1kHz to u16 32.768kHz

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-10-30 05:03:02 -03:00
parent 9a732ea6f8
commit 2ef4bb7dcc
2 changed files with 8 additions and 8 deletions
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4
src/core/emu.zig
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@ -105,8 +105,8 @@ pub fn runFrame(sched: *Scheduler, cpu: *Arm7tdmi) void {
} }
fn audioSync(audio_sync: bool, stream: *SDL.SDL_AudioStream, is_buffer_full: *bool) void { fn audioSync(audio_sync: bool, stream: *SDL.SDL_AudioStream, is_buffer_full: *bool) void {
comptime std.debug.assert(@import("../platform.zig").sample_format == SDL.AUDIO_F32); comptime std.debug.assert(@import("../platform.zig").sample_format == SDL.AUDIO_U16);
const sample_size = 2 * @sizeOf(f32); const sample_size = 2 * @sizeOf(u16);
const max_buf_size: c_int = 0x400; const max_buf_size: c_int = 0x400;
// Determine whether the APU is busy right at this moment // Determine whether the APU is busy right at this moment

12
src/platform.zig
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@ -14,8 +14,8 @@ const span = @import("util.zig").span;
const gba_width = @import("core/ppu.zig").width; const gba_width = @import("core/ppu.zig").width;
const gba_height = @import("core/ppu.zig").height; const gba_height = @import("core/ppu.zig").height;
pub const sample_rate = 44100; pub const sample_rate = 1 << 15;
pub const sample_format = SDL.AUDIO_F32; pub const sample_format = SDL.AUDIO_U16;
const default_title: []const u8 = "ZBA"; const default_title: []const u8 = "ZBA";
@ -203,8 +203,8 @@ pub const Gui = struct {
SDL.SDLK_RETURN => io.keyinput.start.set(), SDL.SDLK_RETURN => io.keyinput.start.set(),
SDL.SDLK_RSHIFT => io.keyinput.select.set(), SDL.SDLK_RSHIFT => io.keyinput.select.set(),
SDL.SDLK_i => { SDL.SDLK_i => {
comptime std.debug.assert(sample_format == SDL.AUDIO_F32); comptime std.debug.assert(sample_format == SDL.AUDIO_U16);
log.err("Sample Count: {}", .{@intCast(u32, SDL.SDL_AudioStreamAvailable(cpu.bus.apu.stream)) / (2 * @sizeOf(f32))}); log.err("Sample Count: {}", .{@intCast(u32, SDL.SDL_AudioStreamAvailable(cpu.bus.apu.stream)) / (2 * @sizeOf(u16))});
}, },
SDL.SDLK_j => log.err("Scheduler Capacity: {} | Scheduler Event Count: {}", .{ scheduler.queue.capacity(), scheduler.queue.count() }), SDL.SDLK_j => log.err("Scheduler Capacity: {} | Scheduler Event Count: {}", .{ scheduler.queue.capacity(), scheduler.queue.count() }),
SDL.SDLK_k => { SDL.SDLK_k => {
@ -271,8 +271,8 @@ const Audio = struct {
want.callback = Self.callback; want.callback = Self.callback;
want.userdata = apu; want.userdata = apu;
std.debug.assert(sample_format == SDL.AUDIO_F32); std.debug.assert(sample_format == SDL.AUDIO_U16);
log.info("Host Sample Rate: {}Hz, Host Format: SDL.AUDIO_F32", .{sample_rate}); log.info("Host Sample Rate: {}Hz, Host Format: SDL.AUDIO_U16", .{sample_rate});
const device = SDL.SDL_OpenAudioDevice(null, 0, &want, &have, 0); const device = SDL.SDL_OpenAudioDevice(null, 0, &want, &have, 0);
if (device == 0) panic(); if (device == 0) panic();