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improve SDLResampler 

this distorts audio less when muting the stream for a while + general cleanup
This commit is contained in:
Morilli 2025-01-27 17:45:14 +01:00
parent 032dea62d6
commit 26ef1ac2af
1 changed files with 2 additions and 14 deletions
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16
src/BizHawk.Emulation.Common/Sound/SDLResampler.cs
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@ -1,7 +1,5 @@
#nullable disable
using System.Runtime.InteropServices;
using static SDL2.SDL;
#pragma warning disable BHI1007 // target-typed Exception TODO don't
@ -49,23 +47,11 @@ namespace BizHawk.Emulation.Common
_input = input;
}
// SDL bindings don't have this for some reason :(
[DllImport("SDL2", CallingConvention = CallingConvention.Cdecl)]
private static extern int SDL_AudioStreamFlush(IntPtr stream);
/// <summary>change sampling rate on the fly</summary>
/// <param name="src_rate">sampling rate in by hz</param>
/// <param name="dst_rate">sampling rate out by hz</param>
public void ChangeRate(int src_rate, int dst_rate)
{
// force flush the stream, as we'll be destroying it to change the sample rate...
if (SDL_AudioStreamFlush(_stream) != 0)
{
throw new($"{nameof(SDL_AudioStreamFlush)} failed! SDL error: {SDL_GetError()}");
}
Flush();
SDL_FreeAudioStream(_stream);
_stream = SDL_NewAudioStream(AUDIO_S16SYS, 2, src_rate, AUDIO_S16SYS, 2, dst_rate);
@ -172,6 +158,8 @@ namespace BizHawk.Emulation.Common
public void DiscardSamples()
{
SDL_AudioStreamClear(_stream);
_outNumSamps = 0;
}