shithub: cstory

Download patch

ref: 5a9492166d630b97b6888e5969c359f8b35862e3
parent: 7ed6731e46099f2f48f1dc551e5494da0c459c95
author: Clownacy <Clownacy@users.noreply.github.com>
date: Tue Sep 3 18:29:57 EDT 2019 

Restored the new SDL2 audio system

While I was at it, I overhauled the thing and found a bunch of
optimisations,


--- a/Makefile
+++ b/Makefile
@@ -124,7 +124,8 @@
 	src/Star \
 	src/TextScr \
 	src/Triangle \
-	src/ValueView
+	src/ValueView \
+	src/Backends/Audio/SDL2
 
 RESOURCES = \
 	BITMAP/Credit01.bmp \
--- /dev/null
+++ b/src/Backends/Audio.h
@@ -1,0 +1,22 @@
+#pragma once
+
+#include "../WindowsWrapper.h"
+
+typedef struct AudioBackend_Sound AudioBackend_Sound;
+
+BOOL AudioBackend_Init(void);
+void AudioBackend_Deinit(void);
+
+AudioBackend_Sound* AudioBackend_CreateSound(unsigned int frequency, size_t frames);
+void AudioBackend_DestroySound(AudioBackend_Sound *sound);
+
+unsigned char* AudioBackend_LockSound(AudioBackend_Sound *sound, size_t *size);
+void AudioBackend_UnlockSound(AudioBackend_Sound *sound);
+
+void AudioBackend_PlaySound(AudioBackend_Sound *sound, BOOL looping);
+void AudioBackend_StopSound(AudioBackend_Sound *sound);
+
+void AudioBackend_SetSoundFrequency(AudioBackend_Sound *sound, unsigned int frequency);
+void AudioBackend_SetSoundVolume(AudioBackend_Sound *sound, long volume);
+void AudioBackend_SetSoundPan(AudioBackend_Sound *sound, long pan);
+void AudioBackend_SetSoundPosition(AudioBackend_Sound *sound, size_t position);
--- /dev/null
+++ b/src/Backends/Audio/SDL2.cpp
@@ -1,0 +1,308 @@
+#include "../Audio.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL.h"
+
+#include "../../WindowsWrapper.h"
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define clamp(x, y, z) MIN(MAX(x, y), z)
+
+struct AudioBackend_Sound
+{
+	unsigned char *samples;
+	size_t frames;
+	double position;
+	double advance_delta;
+	BOOL playing;
+	BOOL looping;
+	unsigned int frequency;
+	float volume;
+	float pan_l;
+	float pan_r;
+	float volume_l;
+	float volume_r;
+
+	struct AudioBackend_Sound *next;
+};
+
+static AudioBackend_Sound *sound_list_head;
+static SDL_AudioDeviceID device_id;
+
+static double MillibelToScale(long volume)
+{
+	// Volume is in hundredths of decibels, from 0 to -10000
+	volume = clamp(volume, -10000, 0);
+	return pow(10.0, volume / 2000.0);
+}
+
+static void SetSoundFrequency(AudioBackend_Sound *sound, unsigned int frequency)
+{
+	sound->frequency = frequency;
+	sound->advance_delta = frequency / 44100.0;
+}
+
+static void SetSoundVolume(AudioBackend_Sound *sound, long volume)
+{
+	sound->volume = MillibelToScale(volume);
+
+	sound->volume_l = sound->pan_l * sound->volume;
+	sound->volume_r = sound->pan_r * sound->volume;
+}
+
+static void SetSoundPan(AudioBackend_Sound *sound, long pan)
+{
+	sound->pan_l = MillibelToScale(-pan);
+	sound->pan_r = MillibelToScale(pan);
+
+	sound->volume_l = sound->pan_l * sound->volume;
+	sound->volume_r = sound->pan_r * sound->volume;
+}
+
+static void SetSoundPosition(AudioBackend_Sound *sound, size_t position)
+{
+	sound->position = position;
+}
+
+static void Callback(void *user_data, Uint8 *stream_uint8, int len)
+{
+	(void)user_data;
+
+	float *stream = (float*)stream_uint8;
+	unsigned int frames_total = len / sizeof(float) / 2;
+
+	for (unsigned int i = 0; i < frames_total * 2; ++i)
+		stream[i] = 0.0f;
+
+	for (AudioBackend_Sound *sound = sound_list_head; sound != NULL; sound = sound->next)
+	{
+		if (sound->playing)
+		{
+			float *steam_pointer = stream;
+
+			unsigned int frames_done = 0;
+
+			while (frames_done != frames_total)
+			{
+				const unsigned int frames_to_do = MIN(ceil((sound->frames - sound->position) / sound->advance_delta), frames_total - frames_done);
+
+				for (unsigned int i = 0; i < frames_to_do; ++i)
+				{
+					// Perform linear interpolation
+
+					// Get two samples
+					const unsigned char sample1 = sound->samples[(size_t)sound->position];
+					const unsigned char sample2 = sound->samples[(size_t)sound->position + 1];
+
+					// Interpolate
+					const float interpolated_sample = sample1 + ((sample2 - sample1) * (float)fmod(sound->position, 1.0));
+
+					// Normalise to 0-1
+					const float sample_normalised = (interpolated_sample - 128.0f) / 128.0f;
+
+					*steam_pointer++ += sample_normalised * sound->volume_l;
+					*steam_pointer++ += sample_normalised * sound->volume_r;
+
+					sound->position += sound->advance_delta;
+				}
+
+				if ((size_t)sound->position >= sound->frames)
+				{
+					if (sound->looping)
+					{
+						sound->position = fmod(sound->position, sound->frames);
+					}
+					else
+					{
+						sound->position = 0.0;
+						sound->playing = FALSE;
+						break;
+					}
+				}
+
+				frames_done += frames_to_do;
+			}
+		}
+	}
+}
+
+BOOL AudioBackend_Init(void)
+{
+	if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0)
+		return FALSE;
+
+	SDL_AudioSpec specification;
+	specification.freq = 44100;
+	specification.format = AUDIO_F32;
+	specification.channels = 2;
+	specification.samples = 0x200;
+	specification.callback = Callback;
+	specification.userdata = NULL;
+
+	device_id = SDL_OpenAudioDevice(NULL, 0, &specification, NULL, 0);
+
+	if (device_id == 0)
+		return FALSE;
+
+	SDL_PauseAudioDevice(device_id, 0);
+
+	return TRUE;
+}
+
+void AudioBackend_Deinit(void)
+{
+	SDL_CloseAudioDevice(device_id);
+
+	SDL_QuitSubSystem(SDL_INIT_AUDIO);
+}
+
+AudioBackend_Sound* AudioBackend_CreateSound(unsigned int frequency, size_t frames)
+{
+	AudioBackend_Sound *sound = (AudioBackend_Sound*)malloc(sizeof(AudioBackend_Sound));
+
+	if (sound == NULL)
+		return NULL;
+
+	sound->samples = (unsigned char*)malloc(frames + 1);
+
+	if (sound->samples == NULL)
+	{
+		free(sound);
+		return NULL;
+	}
+
+	sound->frames = frames;
+	sound->playing = FALSE;
+
+	SetSoundFrequency(sound, frequency);
+	SetSoundVolume(sound, 0);
+	SetSoundPan(sound, 0);
+	SetSoundPosition(sound, 0);
+
+	SDL_LockAudioDevice(device_id);
+
+	sound->next = sound_list_head;
+	sound_list_head = sound;
+
+	SDL_UnlockAudioDevice(device_id);
+
+	return sound;
+}
+
+void AudioBackend_DestroySound(AudioBackend_Sound *sound)
+{
+	if (sound == NULL)
+		return;
+
+	SDL_LockAudioDevice(device_id);
+
+	for (AudioBackend_Sound **sound_pointer = &sound_list_head; *sound_pointer != NULL; sound_pointer = &(*sound_pointer)->next)
+	{
+		if (*sound_pointer == sound)
+		{
+			*sound_pointer = sound->next;
+			free(sound->samples);
+			free(sound);
+			break;
+		}
+	}
+
+	SDL_UnlockAudioDevice(device_id);
+}
+
+unsigned char* AudioBackend_LockSound(AudioBackend_Sound *sound, size_t *size)
+{
+	if (sound == NULL)
+		return NULL;
+
+	SDL_LockAudioDevice(device_id);
+
+	if (size)
+		*size = sound->frames;
+
+	return sound->samples;
+}
+
+void AudioBackend_UnlockSound(AudioBackend_Sound *sound)
+{
+	SDL_UnlockAudioDevice(device_id);	
+}
+
+void AudioBackend_PlaySound(AudioBackend_Sound *sound, BOOL looping)
+{
+	if (sound == NULL)
+		return;
+
+	SDL_LockAudioDevice(device_id);
+
+	sound->playing = TRUE;
+	sound->looping = looping;
+
+	sound->samples[sound->frames] = looping ? sound->samples[0] : 0x80;	// For the linear interpolator
+
+	SDL_UnlockAudioDevice(device_id);
+}
+
+void AudioBackend_StopSound(AudioBackend_Sound *sound)
+{
+	if (sound == NULL)
+		return;
+
+	SDL_LockAudioDevice(device_id);
+
+	sound->playing = FALSE;
+
+	SDL_UnlockAudioDevice(device_id);
+}
+
+void AudioBackend_SetSoundFrequency(AudioBackend_Sound *sound, unsigned int frequency)
+{
+	if (sound == NULL)
+		return;
+
+	SDL_LockAudioDevice(device_id);
+
+	SetSoundFrequency(sound, frequency);
+
+	SDL_UnlockAudioDevice(device_id);
+}
+
+void AudioBackend_SetSoundVolume(AudioBackend_Sound *sound, long volume)
+{
+	if (sound == NULL)
+		return;
+
+	SDL_LockAudioDevice(device_id);
+
+	SetSoundVolume(sound, volume);
+
+	SDL_UnlockAudioDevice(device_id);
+}
+
+void AudioBackend_SetSoundPan(AudioBackend_Sound *sound, long pan)
+{
+	if (sound == NULL)
+		return;
+
+	SDL_LockAudioDevice(device_id);
+
+	SetSoundPan(sound, pan);
+
+	SDL_UnlockAudioDevice(device_id);
+}
+
+void AudioBackend_SetSoundPosition(AudioBackend_Sound *sound, size_t position)
+{
+	if (sound == NULL)
+		return;
+
+	SDL_LockAudioDevice(device_id);
+
+	SetSoundPosition(sound, position);
+
+	SDL_UnlockAudioDevice(device_id);
+}
--- a/src/Main.cpp
+++ b/src/Main.cpp
@@ -329,7 +329,7 @@
 	else
 	{
 		// Initialize sound
-		InitDirectSound(hWnd);
+		InitDirectSound();
 
 		// Initialize joystick
 		if (conf.bJoystick && InitDirectInput())
--- a/src/Organya.cpp
+++ b/src/Organya.cpp
@@ -10,10 +10,9 @@
 #include <stdio.h>
 #include <string.h>
 
-#include <dsound.h>
-
 #include "WindowsWrapper.h"
 
+#include "Backends/Audio.h"
 #include "Resource.h"
 #include "Sound.h"
 
@@ -115,7 +114,7 @@
 
 ORGDATA org_data;
 
-LPDIRECTSOUNDBUFFER lpORGANBUFFER[8][8][2] = {NULL};
+AudioBackend_Sound *lpORGANBUFFER[8][8][2] = {NULL};
 
 int gTrackVol[MAXTRACK];
 int gOrgVolume = 100;
@@ -147,11 +146,6 @@
 	{   8,128, 32 }, // 7 Oct
 };
 
-static WAVEFORMATEX format_tbl2 = {WAVE_FORMAT_PCM, 1, 22050, 22050, 1, 8, 0};	// 22050HzのFormat
-
-// In the original source code, format_tbl2 was a raw array of bytes, as seen below
-// BYTE format_tbl2[] = {0x01,0x00,0x01,0x00,0x22,0x56,0x00,0x00,0x22,0x56,0x00,0x00,0x01,0x00,0x08,0x00,0x00,0x00};	// 22050HzのFormat
-
 BOOL MakeSoundObject8(signed char *wavep, signed char track, signed char pipi)
 {
 	DWORD i,j,k;
@@ -161,12 +155,7 @@
 	BYTE *wp;
 	BYTE *wp_sub;
 	int work;
-	// セカンダリバッファの生成 (Create secondary buffer)
-	DSBUFFERDESC dsbd;
 
-	if (lpDS == NULL)
-		return FALSE;
-
 	for (j = 0; j < 8; j++)
 	{
 		for (k = 0; k < 2; k++)
@@ -178,18 +167,13 @@
 			else
 				data_size = wave_size;
 
-			ZeroMemory(&dsbd, sizeof(dsbd));
+			lpORGANBUFFER[track][j][k] = AudioBackend_CreateSound(22050, data_size);
 
-			dsbd.dwSize = sizeof(dsbd);
-			dsbd.dwBufferBytes = data_size;
-			dsbd.lpwfxFormat = &format_tbl2;
-			dsbd.dwFlags = DSBCAPS_STATIC | DSBCAPS_GLOBALFOCUS | DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME | DSBCAPS_CTRLFREQUENCY;
-
-			if(lpDS->CreateSoundBuffer(&dsbd, &lpORGANBUFFER[track][j][k], NULL) != DS_OK)	// j = se_no
+			if (lpORGANBUFFER[track][j][k] == NULL)
 				return FALSE;
 
 			// Get wave data
-			wp = (BYTE*)malloc(data_size);
+			wp = AudioBackend_LockSound(lpORGANBUFFER[track][j][k], NULL);
 			wp_sub = wp;
 			wav_tp = 0;
 
@@ -207,29 +191,8 @@
 				wp_sub++;
 			}
 
-			// データの転送 (Data transfer)
-			LPVOID lpbuf1, lpbuf2;
-			DWORD dwbuf1, dwbuf2=0;
-			HRESULT hr;
-
-			hr = lpORGANBUFFER[track][j][k]->Lock(0, data_size, &lpbuf1, &dwbuf1, &lpbuf2, &dwbuf2, 0); 
-
-			if (hr != DS_OK)
-			{
-#ifdef FIX_BUGS
-				free(wp);	// The updated Organya source code includes this fix
-#endif
-				return FALSE;
-			}
-
-			CopyMemory(lpbuf1, (BYTE*)wp, dwbuf1);
-
-			if (dwbuf2 != 0)
-				CopyMemory(lpbuf2, (BYTE*)wp+dwbuf1, dwbuf2);
-
-			lpORGANBUFFER[track][j][k]->Unlock(lpbuf1, dwbuf1, lpbuf2, dwbuf2);
-			lpORGANBUFFER[track][j][k]->SetCurrentPosition(0);
-			free(wp);
+			AudioBackend_UnlockSound(lpORGANBUFFER[track][j][k]);
+			AudioBackend_SetSoundPosition(lpORGANBUFFER[track][j][k], 0);
 		}
 	}
 
@@ -240,12 +203,9 @@
 
 void ChangeOrganFrequency(unsigned char key, signed char track, long a)
 {
-	if (lpDS == NULL)
-		return;
-
 	for (int j = 0; j < 8; j++)
 		for (int i = 0; i < 2; i++)
-			lpORGANBUFFER[track][j][i]->SetFrequency(((oct_wave[j].wave_size * freq_tbl[key]) * oct_wave[j].oct_par) / 8 + (a - 1000));	// 1000を+αのデフォルト値とする (1000 is the default value for + α)
+			AudioBackend_SetSoundFrequency(lpORGANBUFFER[track][j][i], ((oct_wave[j].wave_size * freq_tbl[key]) * oct_wave[j].oct_par) / 8 + (a - 1000));	// 1000を+αのデフォルト値とする (1000 is the default value for + α)
 }
 
 const short pan_tbl[13] = {0, 43, 86, 129, 172, 215, 256, 297, 340, 383, 426, 469, 512};
@@ -255,28 +215,19 @@
 
 void ChangeOrganPan(unsigned char key, unsigned char pan, signed char track)	// 512がMAXで256がﾉｰﾏﾙ (512 is MAX and 256 is normal)
 {
-	if (lpDS == NULL)
-		return;
-
 	if (old_key[track] != PANDUMMY)
-		lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]->SetPan((pan_tbl[pan] - 0x100) * 10);
+		AudioBackend_SetSoundPan(lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]], (pan_tbl[pan] - 0x100) * 10);
 }
 
 void ChangeOrganVolume(int no, long volume, signed char track)	// 300がMAXで300がﾉｰﾏﾙ (300 is MAX and 300 is normal)
 {
-	if (lpDS == NULL)
-		return;
-
 	if (old_key[track] != VOLDUMMY)
-		lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]->SetVolume((volume - 0xFF) * 8);
+		AudioBackend_SetSoundVolume(lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]], (volume - 0xFF) * 8);
 }
 
 // サウンドの再生 (Play sound)
 void PlayOrganObject(unsigned char key, int mode, signed char track, long freq)
 {
-	if (lpDS == NULL)
-		return;
-
 	if (lpORGANBUFFER[track][key / 12][key_twin[track]] != NULL)
 	{
 		switch (mode)
@@ -284,8 +235,8 @@
 			case 0:	// 停止 (Stop)
 				if (old_key[track] != 0xFF)
 				{
-					lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]->Stop();
-					lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]->SetCurrentPosition(0);
+					AudioBackend_StopSound(lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]);
+					AudioBackend_SetSoundPosition(lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]], 0);
 				}
 				break;
 
@@ -295,7 +246,7 @@
 			case 2:	// 歩かせ停止 (Stop playback)
 				if (old_key[track] != 0xFF)
 				{
-					lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]->Play(0, 0, 0);
+					AudioBackend_PlaySound(lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]], FALSE);
 					old_key[track] = 0xFF;
 				}
 				break;
@@ -304,7 +255,7 @@
 				if (old_key[track] == 0xFF)	// 新規鳴らす (New sound)
 				{
 					ChangeOrganFrequency(key % 12, track, freq);	// 周波数を設定して (Set the frequency)
-					lpORGANBUFFER[track][key / 12][key_twin[track]]->Play(0, 0, DSBPLAY_LOOPING);
+					AudioBackend_PlaySound(lpORGANBUFFER[track][key / 12][key_twin[track]], TRUE);
 					old_key[track] = key;
 					key_on[track] = 1;
 				}
@@ -311,20 +262,20 @@
 				else if (key_on[track] == 1 && old_key[track] == key)	// 同じ音 (Same sound)
 				{
 					// 今なっているのを歩かせ停止 (Stop playback now)
-					lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]->Play(0, 0, 0);
+					AudioBackend_PlaySound(lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]], FALSE);
 					key_twin[track]++;
 					if (key_twin[track] > 1)
 						key_twin[track] = 0;
-					lpORGANBUFFER[track][key / 12][key_twin[track]]->Play(0, 0, DSBPLAY_LOOPING);
+					AudioBackend_PlaySound(lpORGANBUFFER[track][key / 12][key_twin[track]], TRUE);
 				}
 				else	// 違う音を鳴らすなら (If you make a different sound)
 				{
-					lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]]->Play(0, 0, 0);	// 今なっているのを歩かせ停止 (Stop playback now)
+					AudioBackend_PlaySound(lpORGANBUFFER[track][old_key[track] / 12][key_twin[track]], FALSE);	// 今なっているのを歩かせ停止 (Stop playback now)
 					key_twin[track]++;
 					if (key_twin[track] > 1)
 						key_twin[track] = 0;
 					ChangeOrganFrequency(key % 12, track, freq);	// 周波数を設定して (Set the frequency)
-					lpORGANBUFFER[track][key / 12][key_twin[track]]->Play(0, 0, DSBPLAY_LOOPING);
+					AudioBackend_PlaySound(lpORGANBUFFER[track][key / 12][key_twin[track]], TRUE);
 					old_key[track] = key;
 				}
 
@@ -336,19 +287,16 @@
 // オルガーニャオブジェクトを開放 (Open Organya object)
 void ReleaseOrganyaObject(signed char track)
 {
-	if (lpDS == NULL)
-		return;
-
 	for (int i = 0; i < 8; i++)
 	{
 		if (lpORGANBUFFER[track][i][0] != NULL)
 		{
-			lpORGANBUFFER[track][i][0]->Release();
+			AudioBackend_DestroySound(lpORGANBUFFER[track][i][0]);
 			lpORGANBUFFER[track][i][0] = NULL;
 		}
 		if (lpORGANBUFFER[track][i][1] != NULL)
 		{
-			lpORGANBUFFER[track][i][1]->Release();
+			AudioBackend_DestroySound(lpORGANBUFFER[track][i][1]);
 			lpORGANBUFFER[track][i][1] = NULL;
 		}
 	}
@@ -361,9 +309,6 @@
 {
 	const DWORD *lpdword;	// リソースのアドレス (Resource address)
 
-	if (lpDS == NULL)
-		return FALSE;
-
 	// リソースの検索 (Search for resources)
 	lpdword = (DWORD*)FindResource("WAVE100", "WAVE", NULL);
 
@@ -378,9 +323,6 @@
 // 波形を１００個の中から選択して作成 (Select from 100 waveforms to create)
 BOOL MakeOrganyaWave(signed char track, signed char wave_no, signed char pipi)
 {
-	if (lpDS == NULL)
-		return FALSE;
-
 	if (wave_no > 99)
 		return FALSE;
 
@@ -396,48 +338,36 @@
 
 void ChangeDramFrequency(unsigned char key, signed char track)
 {
-	if (lpDS == NULL)
-		return;
-
-	lpSECONDARYBUFFER[150 + track]->SetFrequency(key * 800 + 100);
+	AudioBackend_SetSoundFrequency(lpSECONDARYBUFFER[150 + track], key * 800 + 100);
 }
 
 void ChangeDramPan(unsigned char pan, signed char track)
 {
-	if (lpDS == NULL)
-		return;
-
-	lpSECONDARYBUFFER[150 + track]->SetPan((pan_tbl[pan] - 0x100) * 10);
+	AudioBackend_SetSoundPan(lpSECONDARYBUFFER[150 + track], (pan_tbl[pan] - 0x100) * 10);
 }
 
 void ChangeDramVolume(long volume, signed char track)
 {
-	if (lpDS == NULL)
-		return;
-
-	lpSECONDARYBUFFER[150 + track]->SetVolume((volume - 0xFF) * 8);
+	AudioBackend_SetSoundVolume(lpSECONDARYBUFFER[150 + track], (volume - 0xFF) * 8);
 }
 
 // サウンドの再生 (Play sound)
 void PlayDramObject(unsigned char key, int mode, signed char track)
 {
-	if (lpDS == NULL)
-		return;
-
 	if (lpSECONDARYBUFFER[150 + track] != NULL)
 	{
 		switch (mode)
 		{
 			case 0:	// 停止 (Stop)
-				lpSECONDARYBUFFER[150 + track]->Stop();
-				lpSECONDARYBUFFER[150 + track]->SetCurrentPosition(0);
+				AudioBackend_StopSound(lpSECONDARYBUFFER[150 + track]);
+				AudioBackend_SetSoundPosition(lpSECONDARYBUFFER[150 + track], 0);
 				break;
 
 			case 1:	// 再生 (Playback)
-				lpSECONDARYBUFFER[150 + track]->Stop();
-				lpSECONDARYBUFFER[150 + track]->SetCurrentPosition(0);
+				AudioBackend_StopSound(lpSECONDARYBUFFER[150 + track]);
+				AudioBackend_SetSoundPosition(lpSECONDARYBUFFER[150 + track], 0);
 				ChangeDramFrequency(key, track);	// 周波数を設定して ()
-				lpSECONDARYBUFFER[150 + track]->Play(0, 0, 0);
+				AudioBackend_PlaySound(lpSECONDARYBUFFER[150 + track], FALSE);
 				break;
 
 			case 2:	// 歩かせ停止 (Stop playback)
@@ -945,11 +875,8 @@
 }
 
 // Start and end organya
-BOOL StartOrganya(LPDIRECTSOUND _lpDS, const char *path_wave)	// Both arguments are ignored for some reason
+BOOL StartOrganya(const char *path_wave)	// The argument is ignored for some reason
 {
-	if (lpDS == NULL)
-		return FALSE;
-
 	if (!InitWaveData100())
 		return FALSE;
 
@@ -961,9 +888,6 @@
 // Load organya file
 BOOL LoadOrganya(const char *name)
 {
-	if (lpDS == NULL)
-		return FALSE;
-
 	if (!org_data.InitMusicData(name))
 		return FALSE;
 
@@ -979,9 +903,6 @@
 
 void SetOrganyaPosition(unsigned int x)
 {
-	if (lpDS == NULL)
-		return;
-
 	org_data.SetPlayPointer(x);
 	gOrgVolume = 100;
 	bFadeout = FALSE;
@@ -989,17 +910,11 @@
 
 unsigned int GetOrganyaPosition(void)
 {
-	if (lpDS == NULL)
-		return 0;
-
 	return play_p;
 }
 
 void PlayOrganyaMusic(void)
 {
-	if (lpDS == NULL)
-		return;
-
 	QuitMMTimer();
 	InitMMTimer();
 	StartTimer(org_data.info.wait);
@@ -1007,9 +922,6 @@
 
 BOOL ChangeOrganyaVolume(signed int volume)
 {
-	if (lpDS == NULL)
-		return FALSE;
-
 	if (volume < 0 || volume > 100)
 		return FALSE;
 
@@ -1019,9 +931,6 @@
 
 void StopOrganyaMusic()
 {
-	if (lpDS == NULL)
-		return;
-
 	// Stop timer
 	QuitMMTimer();
 
@@ -1043,9 +952,6 @@
 
 void EndOrganya()
 {
-	if (lpDS == NULL)
-		return;
-
 	// End timer
 	QuitMMTimer();
 
--- a/src/Organya.h
+++ b/src/Organya.h
@@ -20,5 +20,5 @@
 BOOL ChangeOrganyaVolume(signed int volume);
 void StopOrganyaMusic();
 void SetOrganyaFadeout();
-BOOL StartOrganya(LPDIRECTSOUND lpDS, const char *wave_filename);
+BOOL StartOrganya(const char *wave_filename);
 void EndOrganya();
--- a/src/Sound.cpp
+++ b/src/Sound.cpp
@@ -17,11 +17,9 @@
 #include <stdlib.h>
 #include <string.h>
 
-#define DIRECTSOUND_VERSION 0x500
-#include <dsound.h>
-
 #include "WindowsWrapper.h"
 
+#include "Backends/Audio.h"
 #include "Organya.h"
 #include "PixTone.h"
 #include "Tags.h"
@@ -28,39 +26,20 @@
 
 #define FREQUENCY 44100
 
-LPDIRECTSOUND       lpDS;            // DirectSoundオブジェクト (DirectSound object)
-LPDIRECTSOUNDBUFFER lpPRIMARYBUFFER; // 一時バッファ (Temporary buffer)
-LPDIRECTSOUNDBUFFER lpSECONDARYBUFFER[SE_MAX]; 
+AudioBackend_Sound *lpSECONDARYBUFFER[SE_MAX];
 
 // DirectSoundの開始 (Starting DirectSound)
-BOOL InitDirectSound(HWND hwnd)
+BOOL InitDirectSound(void)
 {
 	int i;
-	DSBUFFERDESC dsbd;
 
-	// DirectDrawの初期化 (DirectDraw initialization)
-	if (DirectSoundCreate(NULL, &lpDS, NULL) != DS_OK)
-	{
-		lpDS = NULL;
-#ifndef FIX_BUGS
-		// This makes absolutely no sense here
-		StartOrganya(lpDS, "Org\\Wave.dat");
-#endif
+	if (!AudioBackend_Init())
 		return FALSE;
-	}
 
-	lpDS->SetCooperativeLevel(hwnd, DSSCL_EXCLUSIVE);
-
-	// 一次バッファの初期化 (Initializing the primary buffer)
-	ZeroMemory(&dsbd, sizeof(dsbd));
-	dsbd.dwSize = sizeof(dsbd);
-	dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME;
-	lpDS->CreateSoundBuffer(&dsbd, &lpPRIMARYBUFFER, NULL);
-
 	for (i = 0; i < SE_MAX; i++)
 		lpSECONDARYBUFFER[i] = NULL;
 
-	StartOrganya(lpDS, "Org\\Wave.dat");
+	StartOrganya("Org\\Wave.dat");
 
 	return TRUE;
 }
@@ -70,24 +49,15 @@
 {
 	int i;
 
-	if (lpDS == NULL)
-		return;
-
 	EndOrganya();
 
 	for (i = 0; i < SE_MAX; i++)
 		if (lpSECONDARYBUFFER[i] != NULL)
-			lpSECONDARYBUFFER[i]->Release();
+			AudioBackend_DestroySound(lpSECONDARYBUFFER[i]);
 
-	if (lpPRIMARYBUFFER != NULL)
-		lpPRIMARYBUFFER->Release();
-
-	if (lpDS != NULL)
-		lpDS->Release();
-
-	lpDS = NULL;
+	AudioBackend_Deinit();
 }
-
+/*
 // サウンドの設定 (Sound settings)
 BOOL InitSoundObject(LPCSTR resname, int no)
 {
@@ -219,28 +189,25 @@
 
 	return TRUE;
 }
-
+*/
 void PlaySoundObject(int no, int mode)
 {
-	if (lpDS == NULL)
-		return;
-
 	if (lpSECONDARYBUFFER[no] != NULL)
 	{
 		switch (mode)
 		{
 			case 0:	// 停止 (Stop)
-				lpSECONDARYBUFFER[no]->Stop();
+				AudioBackend_StopSound(lpSECONDARYBUFFER[no]);
 				break;
 
 			case 1:	// 再生 (Playback)
-				lpSECONDARYBUFFER[no]->Stop();
-				lpSECONDARYBUFFER[no]->SetCurrentPosition(0);
-				lpSECONDARYBUFFER[no]->Play(0, 0, 0);
+				AudioBackend_StopSound(lpSECONDARYBUFFER[no]);
+				AudioBackend_SetSoundPosition(lpSECONDARYBUFFER[no], 0);
+				AudioBackend_PlaySound(lpSECONDARYBUFFER[no], FALSE);
 				break;
 
 			case -1:// ループ再生 (Loop playback)
-				lpSECONDARYBUFFER[no]->Play(0, 0, DSBPLAY_LOOPING);
+				AudioBackend_PlaySound(lpSECONDARYBUFFER[no], TRUE);
 				break;
 		}
 	}
@@ -248,81 +215,30 @@
 
 void ChangeSoundFrequency(int no, DWORD rate)	// 100がMIN9999がMAXで2195?がﾉｰﾏﾙ (100 is MIN, 9999 is MAX, and 2195 is normal)
 {
-	if (lpDS == NULL)
-		return;
-
-	lpSECONDARYBUFFER[no]->SetFrequency((rate * 10) + 100);
+	AudioBackend_SetSoundFrequency(lpSECONDARYBUFFER[no], (rate * 10) + 100);
 }
 
 void ChangeSoundVolume(int no, long volume)	// 300がMAXで300がﾉｰﾏﾙ (300 is MAX and 300 is normal)
 {
-	if (lpDS == NULL)
-		return;
-
-	lpSECONDARYBUFFER[no]->SetVolume((volume - 300) * 8);
+	AudioBackend_SetSoundVolume(lpSECONDARYBUFFER[no], (volume - 300) * 8);
 }
 
 void ChangeSoundPan(int no, long pan)	// 512がMAXで256がﾉｰﾏﾙ (512 is MAX and 256 is normal)
 {
-	if (lpDS == NULL)
-		return;
-
-	lpSECONDARYBUFFER[no]->SetPan((pan - 256) * 10);
+	AudioBackend_SetSoundPan(lpSECONDARYBUFFER[no], (pan - 256) * 10);
 }
 
 // TODO - The stack frame for this function is inaccurate
 int MakePixToneObject(const PIXTONEPARAMETER *ptp, int ptp_num, int no)
 {
-	// For some reason, this function creates an entire WAV file header,
-	// when it only needs a WAVEFORMATEX
-	typedef struct WavHeader
-	{
-		char riff[4];
-		unsigned long wav_size;
-		char wave[4];
-		char fmt[4];
-		unsigned long fmt_chunk_size;
-		unsigned short audio_format;
-		unsigned short num_channels;
-		unsigned long sample_rate;
-		unsigned long byte_rate;
-		unsigned short sample_alignment;
-		unsigned short bit_depth;
-		char data[4];
-		unsigned long data_bytes;
-	} WavHeader;
-
 	int i;
 	int j;
 	DSBUFFERDESC dsbd;
-	WavHeader wav_header;
 	const PIXTONEPARAMETER *ptp_pointer;
 	int sample_count;
 	unsigned char *pcm_buffer;
 	unsigned char *mixed_pcm_buffer;
 
-	if (lpDS == NULL)
-		return 0;
-
-	const char *riff = "RIFF";
-	const char *fmt = "fmt ";
-	const char *wave = "WAVE";
-	const char *data = "data";
-
-	wav_header.bit_depth = 8;
-	wav_header.sample_rate = 22050;
-	wav_header.num_channels = 1;
-	wav_header.audio_format = WAVE_FORMAT_PCM;
-	wav_header.fmt_chunk_size = 16;
-	memcpy(wav_header.riff, riff, 4);
-	memcpy(wav_header.fmt, fmt, 4);
-	memcpy(wav_header.wave, wave, 4);
-	memcpy(wav_header.data, data, 4);
-	wav_header.sample_alignment = (wav_header.bit_depth / 8) * wav_header.num_channels;
-	wav_header.byte_rate = (wav_header.bit_depth / 8) * wav_header.num_channels * wav_header.sample_rate;
-	wav_header.data_bytes = wav_header.sample_alignment * ptp->size;
-	wav_header.wav_size = wav_header.data_bytes + 36;
-
 	ptp_pointer = ptp;
 	sample_count = 0;
 
@@ -334,13 +250,9 @@
 		++ptp_pointer;
 	}
 
-	ZeroMemory(&dsbd, sizeof(dsbd));
-	dsbd.dwSize = sizeof(dsbd);
-	dsbd.dwFlags = DSBCAPS_STATIC | DSBCAPS_GLOBALFOCUS | DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME | DSBCAPS_CTRLFREQUENCY;
-	dsbd.dwBufferBytes = sample_count;
-	dsbd.lpwfxFormat = (WAVEFORMATEX*)&wav_header.audio_format;
+	lpSECONDARYBUFFER[no] = AudioBackend_CreateSound(22050, ptp->size);
 
-	if (lpDS->CreateSoundBuffer(&dsbd, &lpSECONDARYBUFFER[no], 0) != DS_OK)
+	if (lpSECONDARYBUFFER[no] == NULL)
 		return -1;
 
 	pcm_buffer = mixed_pcm_buffer = NULL;
@@ -394,17 +306,11 @@
 	mixed_pcm_buffer[0] = mixed_pcm_buffer[0];
 	mixed_pcm_buffer[sample_count - 1] = mixed_pcm_buffer[sample_count - 1];
 
-	LPVOID lpbuf1, lpbuf2;
-	DWORD dwbuf1, dwbuf2;
+	unsigned char *buffer = AudioBackend_LockSound(lpSECONDARYBUFFER[no], NULL);
 
-	lpSECONDARYBUFFER[no]->Lock(0, sample_count, &lpbuf1, &dwbuf1, &lpbuf2, &dwbuf2, 0); 
+	memcpy(buffer, mixed_pcm_buffer, ptp->size);
 
-	CopyMemory(lpbuf1, mixed_pcm_buffer, dwbuf1);
-
-	if (dwbuf2 != 0)
-		CopyMemory(lpbuf2, mixed_pcm_buffer + dwbuf1, dwbuf2);
-
-	lpSECONDARYBUFFER[no]->Unlock(lpbuf1, dwbuf1, lpbuf2, dwbuf2);
+	AudioBackend_UnlockSound(lpSECONDARYBUFFER[no]);
 
 	if (pcm_buffer != NULL)
 		free(pcm_buffer);
--- a/src/Sound.h
+++ b/src/Sound.h
@@ -2,21 +2,16 @@
 
 #include <stddef.h>
 
-#ifndef DIRECTSOUND_VERSION
-#define DIRECTSOUND_VERSION 0x500
-#endif
-#include <dsound.h>
-
 #include "WindowsWrapper.h"
 
+#include "Backends/Audio.h"
 #include "PixTone.h"
 
 #define SE_MAX 160	// According to the Organya source code release, this is the real name for this constant
 
-extern LPDIRECTSOUND       lpDS;
-extern LPDIRECTSOUNDBUFFER lpSECONDARYBUFFER[SE_MAX];
+extern AudioBackend_Sound *lpSECONDARYBUFFER[SE_MAX];
 
-BOOL InitDirectSound(HWND hwnd);
+BOOL InitDirectSound(void);
 void EndDirectSound(void);
 void PlaySoundObject(int no, int mode);
 void ChangeSoundFrequency(int no, unsigned long rate);
-- 
⑨