mirror of
https://github.com/melonDS-emu/melonDS.git
synced 2025-07-25 07:10:00 -06:00
e973236203
* First crack at refactoring NDS and DSi into objects - Remove all global/`static` variables in `NDS` and related classes - Rely more on virtual dispatch when we need to pick methods at runtime - Pass `NDS&` or `DSi&` to its constituent components where necessary - Introduce some headers or move some definitions to break `#include` cycles * Refactor the frontend to accommodate the core's changes * Move up `SchedList`'s declaration - Move it to before the components are initialized so the `map`s inside are initialized - Fields in C++ are initialized in the order they're declared * Fix a crash when allocating memory * Fix JIT-free builds * Fix GDB-free builds * Fix Linux builds - Explicitly qualify some member types in NDS, since they share the same name as their classes * Remove an unnecessary template argument - This was causing the build to fail on macOS * Fix ARM and Android builds * Rename `Constants.h` to `MemConstants.h` * Add `NDS::IsRunning()` * Use an `#include` guard instead of `#pragma once`
137 lines
3.0 KiB
C++
137 lines
3.0 KiB
C++
/*
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Copyright 2016-2023 melonDS team
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This file is part of melonDS.
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melonDS is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with melonDS. If not, see http://www.gnu.org/licenses/.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "FrontendUtil.h"
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#include "NDS.h"
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#include "mic_blow.h"
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using namespace melonDS;
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namespace Frontend
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{
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int AudioOut_Freq;
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float AudioOut_SampleFrac;
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s16* MicBuffer;
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u32 MicBufferLength;
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u32 MicBufferReadPos;
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void Init_Audio(int outputfreq)
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{
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AudioOut_Freq = outputfreq;
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AudioOut_SampleFrac = 0;
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MicBuffer = nullptr;
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MicBufferLength = 0;
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MicBufferReadPos = 0;
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}
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int AudioOut_GetNumSamples(int outlen)
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{
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float f_len_in = (outlen * 32823.6328125) / (float)AudioOut_Freq;
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f_len_in += AudioOut_SampleFrac;
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int len_in = (int)floor(f_len_in);
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AudioOut_SampleFrac = f_len_in - len_in;
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return len_in;
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}
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void AudioOut_Resample(s16* inbuf, int inlen, s16* outbuf, int outlen, int volume)
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{
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float res_incr = inlen / (float)outlen;
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float res_timer = 0;
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int res_pos = 0;
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for (int i = 0; i < outlen; i++)
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{
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outbuf[i*2 ] = (inbuf[res_pos*2 ] * volume) >> 8;
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outbuf[i*2+1] = (inbuf[res_pos*2+1] * volume) >> 8;
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res_timer += res_incr;
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while (res_timer >= 1.0)
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{
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res_timer -= 1.0;
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res_pos++;
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}
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}
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}
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void Mic_FeedSilence(NDS& nds)
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{
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MicBufferReadPos = 0;
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nds.MicInputFrame(NULL, 0);
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}
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void Mic_FeedNoise(NDS& nds)
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{
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int sample_len = sizeof(mic_blow) / sizeof(u16);
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static int sample_pos = 0;
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s16 tmp[735];
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for (int i = 0; i < 735; i++)
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{
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tmp[i] = mic_blow[sample_pos];
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sample_pos++;
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if (sample_pos >= sample_len) sample_pos = 0;
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}
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nds.MicInputFrame(tmp, 735);
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}
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void Mic_FeedExternalBuffer(NDS& nds)
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{
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if (!MicBuffer) return Mic_FeedSilence(nds);
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if ((MicBufferReadPos + 735) > MicBufferLength)
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{
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s16 tmp[735];
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u32 len1 = MicBufferLength - MicBufferReadPos;
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memcpy(&tmp[0], &MicBuffer[MicBufferReadPos], len1*sizeof(s16));
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memcpy(&tmp[len1], &MicBuffer[0], (735 - len1)*sizeof(s16));
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nds.MicInputFrame(tmp, 735);
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MicBufferReadPos = 735 - len1;
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}
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else
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{
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nds.MicInputFrame(&MicBuffer[MicBufferReadPos], 735);
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MicBufferReadPos += 735;
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}
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}
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void Mic_SetExternalBuffer(s16* buffer, u32 len)
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{
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MicBuffer = buffer;
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MicBufferLength = len;
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MicBufferReadPos = 0;
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}
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}
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