Migrate sound to SDL (#70)

CMakeLists.txt

@@ -233,7 +233,8 @@ add_executable(${EXECUTABLE_NAME} WIN32 MACOSX_BUNDLE
 )
 
 target_sources(${EXECUTABLE_NAME} PUBLIC
-    "src/dsound_compat.h"
+    "src/audio_engine.cc"
+    "src/audio_engine.h"
     "src/fps_limiter.cc"
     "src/fps_limiter.h"
     "src/platform_compat.cc"

src/audio_engine.cc

@@ -0,0 +1,432 @@
+#include "audio_engine.h"
+
+#include <string.h>
+
+#include <mutex>
+
+#include <SDL.h>
+
+#define AUDIO_ENGINE_SOUND_BUFFERS 8
+
+struct AudioEngineSoundBuffer {
+    bool active;
+    unsigned int size;
+    int bitsPerSample;
+    int channels;
+    int rate;
+    void* data;
+    int volume;
+    bool playing;
+    bool looping;
+    unsigned int pos;
+    SDL_AudioStream* stream;
+    std::recursive_mutex mutex;
+};
+
+extern bool gProgramIsActive;
+
+static bool soundBufferIsValid(int soundBufferIndex);
+static void audioEngineMixin(void* userData, Uint8* stream, int length);
+
+static SDL_AudioSpec gAudioEngineSpec;
+static SDL_AudioDeviceID gAudioEngineDeviceId = -1;
+static AudioEngineSoundBuffer gAudioEngineSoundBuffers[AUDIO_ENGINE_SOUND_BUFFERS];
+
+static bool soundBufferIsValid(int soundBufferIndex)
+{
+    return soundBufferIndex >= 0 && soundBufferIndex < AUDIO_ENGINE_SOUND_BUFFERS;
+}
+
+static void audioEngineMixin(void* userData, Uint8* stream, int length)
+{
+    memset(stream, gAudioEngineSpec.silence, length);
+
+    if (!gProgramIsActive) {
+        return;
+    }
+
+    for (int index = 0; index < AUDIO_ENGINE_SOUND_BUFFERS; index++) {
+        AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[index]);
+        std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+        if (soundBuffer->active && soundBuffer->playing) {
+            int srcFrameSize = soundBuffer->bitsPerSample / 8 * soundBuffer->channels;
+
+            unsigned char buffer[1024];
+            int pos = 0;
+            while (pos < length) {
+                int remaining = length - pos;
+                if (remaining > sizeof(buffer)) {
+                    remaining = sizeof(buffer);
+                }
+
+                // TODO: Make something better than frame-by-frame convertion.
+                SDL_AudioStreamPut(soundBuffer->stream, (unsigned char*)soundBuffer->data + soundBuffer->pos, srcFrameSize);
+                soundBuffer->pos += srcFrameSize;
+
+                int bytesRead = SDL_AudioStreamGet(soundBuffer->stream, buffer, remaining);
+                if (bytesRead == -1) {
+                    break;
+                }
+
+                SDL_MixAudioFormat(stream + pos, buffer, gAudioEngineSpec.format, bytesRead, soundBuffer->volume);
+
+                if (soundBuffer->pos >= soundBuffer->size) {
+                    if (soundBuffer->looping) {
+                        soundBuffer->pos %= soundBuffer->size;
+                    } else {
+                        soundBuffer->playing = false;
+                        break;
+                    }
+                }
+
+                pos += bytesRead;
+            }
+        }
+    }
+}
+
+bool audioEngineInit()
+{
+    if (SDL_InitSubSystem(SDL_INIT_AUDIO) == -1) {
+        return false;
+    }
+
+    SDL_AudioSpec desiredSpec;
+    desiredSpec.freq = 22050;
+    desiredSpec.format = AUDIO_S16;
+    desiredSpec.channels = 2;
+    desiredSpec.samples = 1024;
+    desiredSpec.callback = audioEngineMixin;
+
+    gAudioEngineDeviceId = SDL_OpenAudioDevice(NULL, 0, &desiredSpec, &gAudioEngineSpec, SDL_AUDIO_ALLOW_ANY_CHANGE);
+    if (gAudioEngineDeviceId == -1) {
+        return false;
+    }
+
+    SDL_PauseAudioDevice(gAudioEngineDeviceId, 0);
+
+    return true;
+}
+
+void audioEngineExit()
+{
+    if (gAudioEngineDeviceId != -1) {
+        SDL_CloseAudioDevice(gAudioEngineDeviceId);
+        gAudioEngineDeviceId = -1;
+    }
+
+    SDL_QuitSubSystem(SDL_INIT_AUDIO);
+}
+
+void audioEnginePause()
+{
+    if (gAudioEngineDeviceId != -1) {
+        SDL_PauseAudioDevice(gAudioEngineDeviceId, 1);
+    }
+}
+
+void audioEngineResume()
+{
+    if (gAudioEngineDeviceId != -1) {
+        SDL_PauseAudioDevice(gAudioEngineDeviceId, 0);
+    }
+}
+
+int audioEngineCreateSoundBuffer(unsigned int size, int bitsPerSample, int channels, int rate)
+{
+    for (int index = 0; index < AUDIO_ENGINE_SOUND_BUFFERS; index++) {
+        AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[index]);
+        std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+        if (!soundBuffer->active) {
+            soundBuffer->active = true;
+            soundBuffer->size = size;
+            soundBuffer->bitsPerSample = bitsPerSample;
+            soundBuffer->channels = channels;
+            soundBuffer->rate = rate;
+            soundBuffer->volume = SDL_MIX_MAXVOLUME;
+            soundBuffer->playing = false;
+            soundBuffer->looping = false;
+            soundBuffer->pos = 0;
+            soundBuffer->data = malloc(size);
+            soundBuffer->stream = SDL_NewAudioStream(bitsPerSample == 16 ? AUDIO_S16 : AUDIO_S8, channels, rate, gAudioEngineSpec.format, gAudioEngineSpec.channels, gAudioEngineSpec.freq);
+            return index;
+        }
+    }
+
+    return -1;
+}
+
+bool audioEngineSoundBufferRelease(int soundBufferIndex)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    soundBuffer->active = false;
+
+    free(soundBuffer->data);
+    soundBuffer->data = NULL;
+
+    SDL_FreeAudioStream(soundBuffer->stream);
+    soundBuffer->stream = NULL;
+
+    return true;
+}
+
+bool audioEngineSoundBufferSetVolume(int soundBufferIndex, int volume)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    soundBuffer->volume = volume;
+
+    return true;
+}
+
+bool audioEngineSoundBufferGetVolume(int soundBufferIndex, int* volumePtr)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    *volumePtr = soundBuffer->volume;
+
+    return true;
+}
+
+bool audioEngineSoundBufferSetPan(int soundBufferIndex, int pan)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    // NOTE: Audio engine does not support sound panning. I'm not sure it's
+    // even needed. For now this value is silently ignored.
+
+    return true;
+}
+
+bool audioEngineSoundBufferPlay(int soundBufferIndex, unsigned int flags)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    soundBuffer->playing = true;
+
+    if ((flags & AUDIO_ENGINE_SOUND_BUFFER_PLAY_LOOPING) != 0) {
+        soundBuffer->looping = true;
+    }
+
+    return true;
+}
+
+bool audioEngineSoundBufferStop(int soundBufferIndex)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    soundBuffer->playing = false;
+
+    return true;
+}
+
+bool audioEngineSoundBufferGetCurrentPosition(int soundBufferIndex, unsigned int* readPosPtr, unsigned int* writePosPtr)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    if (readPosPtr != NULL) {
+        *readPosPtr = soundBuffer->pos;
+    }
+
+    if (writePosPtr != NULL) {
+        *writePosPtr = soundBuffer->pos;
+
+        if (soundBuffer->playing) {
+            // 15 ms lead
+            // See: https://docs.microsoft.com/en-us/previous-versions/windows/desktop/mt708925(v=vs.85)#remarks
+            *writePosPtr += soundBuffer->rate / 150;
+            *writePosPtr %= soundBuffer->size;
+        }
+    }
+
+    return true;
+}
+
+bool audioEngineSoundBufferSetCurrentPosition(int soundBufferIndex, unsigned int pos)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    soundBuffer->pos = pos % soundBuffer->size;
+
+    return true;
+}
+
+bool audioEngineSoundBufferLock(int soundBufferIndex, unsigned int writePos, unsigned int writeBytes, void** audioPtr1, unsigned int* audioBytes1, void** audioPtr2, unsigned int* audioBytes2, unsigned int flags)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    if (audioBytes1 == NULL) {
+        return false;
+    }
+
+    if ((flags & AUDIO_ENGINE_SOUND_BUFFER_LOCK_FROM_WRITE_POS) != 0) {
+        if (!audioEngineSoundBufferGetCurrentPosition(soundBufferIndex, NULL, &writePos)) {
+            return false;
+        }
+    }
+
+    if ((flags & AUDIO_ENGINE_SOUND_BUFFER_LOCK_ENTIRE_BUFFER) != 0) {
+        writeBytes = soundBuffer->size;
+    }
+
+    if (writePos + writeBytes <= soundBuffer->size) {
+        *(unsigned char**)audioPtr1 = (unsigned char*)soundBuffer->data + writePos;
+        *audioBytes1 = writeBytes;
+
+        if (audioPtr2 != NULL) {
+            *audioPtr2 = NULL;
+        }
+
+        if (audioBytes2 != NULL) {
+            *audioBytes2 = 0;
+        }
+    } else {
+        unsigned int remainder = writePos + writeBytes - soundBuffer->size;
+        *(unsigned char**)audioPtr1 = (unsigned char*)soundBuffer->data + writePos;
+        *audioBytes1 = soundBuffer->size - writePos;
+
+        if (audioPtr2 != NULL) {
+            *(unsigned char**)audioPtr2 = (unsigned char*)soundBuffer->data;
+        }
+
+        if (audioBytes2 != NULL) {
+            *audioBytes2 = writeBytes - (soundBuffer->size - writePos);
+        }
+    }
+
+    // TODO: Mark range as locked.
+
+    return true;
+}
+
+bool audioEngineSoundBufferUnlock(int soundBufferIndex, void* audioPtr1, unsigned int audioBytes1, void* audioPtr2, unsigned int audioBytes2)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    // TODO: Mark range as unlocked.
+
+    return true;
+}
+
+bool audioEngineSoundBufferGetStatus(int soundBufferIndex, unsigned int* statusPtr)
+{
+    if (!soundBufferIsValid(soundBufferIndex)) {
+        return false;
+    }
+
+    AudioEngineSoundBuffer* soundBuffer = &(gAudioEngineSoundBuffers[soundBufferIndex]);
+    std::lock_guard<std::recursive_mutex> lock(soundBuffer->mutex);
+
+    if (!soundBuffer->active) {
+        return false;
+    }
+
+    if (statusPtr == NULL) {
+        return false;
+    }
+
+    *statusPtr = 0;
+
+    if (soundBuffer->playing) {
+        *statusPtr |= AUDIO_ENGINE_SOUND_BUFFER_STATUS_PLAYING;
+
+        if (soundBuffer->looping) {
+            *statusPtr |= AUDIO_ENGINE_SOUND_BUFFER_STATUS_LOOPING;
+        }
+    }
+
+    return true;
+}

src/audio_engine.h

@@ -0,0 +1,29 @@
+#ifndef AUDIO_ENGINE_H
+#define AUDIO_ENGINE_H
+
+#define AUDIO_ENGINE_SOUND_BUFFER_LOCK_FROM_WRITE_POS 0x00000001
+#define AUDIO_ENGINE_SOUND_BUFFER_LOCK_ENTIRE_BUFFER 0x00000002
+
+#define AUDIO_ENGINE_SOUND_BUFFER_PLAY_LOOPING 0x00000001
+
+#define AUDIO_ENGINE_SOUND_BUFFER_STATUS_PLAYING 0x00000001
+#define AUDIO_ENGINE_SOUND_BUFFER_STATUS_LOOPING 0x00000004
+
+bool audioEngineInit();
+void audioEngineExit();
+void audioEnginePause();
+void audioEngineResume();
+int audioEngineCreateSoundBuffer(unsigned int size, int bitsPerSample, int channels, int rate);
+bool audioEngineSoundBufferRelease(int soundBufferIndex);
+bool audioEngineSoundBufferSetVolume(int soundBufferIndex, int volume);
+bool audioEngineSoundBufferGetVolume(int soundBufferIndex, int* volumePtr);
+bool audioEngineSoundBufferSetPan(int soundBufferIndex, int pan);
+bool audioEngineSoundBufferPlay(int soundBufferIndex, unsigned int flags);
+bool audioEngineSoundBufferStop(int soundBufferIndex);
+bool audioEngineSoundBufferGetCurrentPosition(int soundBufferIndex, unsigned int* readPosPtr, unsigned int* writePosPtr);
+bool audioEngineSoundBufferSetCurrentPosition(int soundBufferIndex, unsigned int pos);
+bool audioEngineSoundBufferLock(int soundBufferIndex, unsigned int writePos, unsigned int writeBytes, void** audioPtr1, unsigned int* audioBytes1, void** audioPtr2, unsigned int* audioBytes2, unsigned int flags);
+bool audioEngineSoundBufferUnlock(int soundBufferIndex, void* audioPtr1, unsigned int audioBytes1, void* audioPtr2, unsigned int audioBytes2);
+bool audioEngineSoundBufferGetStatus(int soundBufferIndex, unsigned int* status);
+
+#endif /* AUDIO_ENGINE_H */

src/core.cc

@@ -1,5 +1,6 @@
 #include "core.h"
 
+#include "audio_engine.h"
 #include "config.h"
 #include "color.h"
 #include "dinput.h"
@@ -15,9 +16,6 @@
 #include <limits.h>
 #include <string.h>
 #include <SDL.h>
-#if _WIN32
-#include <SDL_syswm.h>
-#endif
 
 // NOT USED.
 void (*_idle_func)() = NULL;
@@ -1276,9 +1274,11 @@ void _GNW95_process_message()
             case SDL_WINDOWEVENT_FOCUS_GAINED:
                 gProgramIsActive = true;
                 windowRefreshAll(&_scr_size);
+                audioEngineResume();
                 break;
             case SDL_WINDOWEVENT_FOCUS_LOST:
                 gProgramIsActive = false;
+                audioEnginePause();
                 break;
             }
             break;
@@ -2055,18 +2055,6 @@ int _GNW95_init_window(int width, int height, bool fullscreen)
         if (gSdlTextureSurface == NULL) {
             goto err;
         }
-
-#if _WIN32
-        SDL_SysWMinfo info;
-        SDL_VERSION(&info.version);
-
-        if (!SDL_GetWindowWMInfo(gSdlWindow, &info)) {
-            goto err;
-        }
-
-        // Needed for DirectSound.
-        gProgramWindow = info.info.win.window;
-#endif
     }
 
     return 0;

src/dsound_compat.h

@@ -1,17 +0,0 @@
-#ifndef DSOUND_COMPAT_H
-#define DSOUND_COMPAT_H
-
-#ifdef _WIN32
-#define HAVE_DSOUND 1
-
-#define WIN32_LEAN_AND_MEAN
-#define NOMINMAX
-#include <windows.h>
-
-#include <mmreg.h>
-
-#define DIRECTSOUND_VERSION 0x0300
-#include <dsound.h>
-#endif
-
-#endif /* DSOUND_COMPAT_H */

src/movie.cc

@@ -163,9 +163,6 @@ static int _movieX;
 // 0x638EB4
 static int _movieY;
 
-// 0x638EB8
-static bool gMovieDirectSoundInitialized;
-
 // 0x638EBC
 static File* _alphaHandle;
 
@@ -364,12 +361,6 @@ static int _noop()
 void movieInit()
 {
     movieLibSetMemoryProcs(movieMallocImpl, movieFreeImpl);
-#ifdef HAVE_DSOUND
-    movieLibSetDirectSound(gDirectSound);
-    gMovieDirectSoundInitialized = (gDirectSound != NULL);
-#else
-    gMovieDirectSoundInitialized = false;
-#endif
     movieLibSetPaletteEntriesProc(movieSetPaletteEntriesImpl);
     _MVE_sfSVGA(640, 480, 480, 0, 0, 0, 0, 0, 0);
     movieLibSetReadProc(movieReadImpl);
@@ -835,10 +826,8 @@ void movieSetBuildSubtitleFilePathProc(MovieBuildSubtitleFilePathProc* proc)
 // 0x487BD0
 void movieSetVolume(int volume)
 {
-    if (gMovieDirectSoundInitialized) {
-        int normalizedVolume = _soundVolumeHMItoDirectSound(volume);
-        movieLibSetVolume(normalizedVolume);
-    }
+    int normalizedVolume = _soundVolumeHMItoDirectSound(volume);
+    movieLibSetVolume(normalizedVolume);
 }
 
 // 0x487BEC

src/movie_lib.cc

@@ -4,6 +4,7 @@
 
 #include "movie_lib.h"
 
+#include "audio_engine.h"
 #include "platform_compat.h"
 
 #include <assert.h>
@@ -146,16 +147,6 @@ static int _sync_late = 0;
 // 0x51EDEC
 static int _sync_FrameDropped = 0;
 
-#ifdef HAVE_DSOUND
-// 0x51EDF0
-static LPDIRECTSOUND gMovieLibDirectSound = NULL;
-#endif
-
-#ifdef HAVE_DSOUND
-// 0x51EDF4
-static LPDIRECTSOUNDBUFFER gMovieLibDirectSoundBuffer = NULL;
-#endif
-
 // 0x51EDF8
 static int gMovieLibVolume = 0;
 
@@ -348,11 +339,6 @@ static unsigned int _$$R0063[256] = {
 // 0x6B3660
 static int dword_6B3660;
 
-#ifdef HAVE_DSOUND
-// 0x6B3668
-static DSBCAPS stru_6B3668;
-#endif
-
 // 0x6B367C
 static int _sf_ScreenWidth;
 
@@ -520,6 +506,8 @@ static int dword_6B403F;
 
 static SDL_Surface* gMovieSdlSurface1;
 static SDL_Surface* gMovieSdlSurface2;
+static int gMveSoundBuffer = -1;
+static unsigned int gMveBufferBytes;
 
 // 0x4F4800
 void movieLibSetMemoryProcs(MallocProc* mallocProc, FreeProc* freeProc)
@@ -558,24 +546,14 @@ static void _MVE_MemFree(STRUCT_6B3690* a1)
     a1->field_4 = 0;
 }
 
-#ifdef HAVE_DSOUND
-// 0x4F48F0
-void movieLibSetDirectSound(LPDIRECTSOUND ds)
-{
-    gMovieLibDirectSound = ds;
-}
-#endif
-
 // 0x4F4900
 void movieLibSetVolume(int volume)
 {
     gMovieLibVolume = volume;
 
-#ifdef HAVE_DSOUND
-    if (gMovieLibDirectSoundBuffer != NULL) {
-        IDirectSoundBuffer_SetVolume(gMovieLibDirectSoundBuffer, volume);
+    if (gMveSoundBuffer != -1) {
+        audioEngineSoundBufferSetVolume(gMveSoundBuffer, volume);
     }
-#endif
 }
 
 // 0x4F4920
@@ -583,11 +561,9 @@ void movieLibSetPan(int pan)
 {
     gMovieLibPan = pan;
 
-#ifdef HAVE_DSOUND
-    if (gMovieLibDirectSoundBuffer != NULL) {
-        IDirectSoundBuffer_SetPan(gMovieLibDirectSoundBuffer, pan);
+    if (gMveSoundBuffer != -1) {
+        audioEngineSoundBufferSetPan(gMveSoundBuffer, pan);
     }
-#endif
 }
 
 // 0x4F4940
@@ -832,11 +808,9 @@ static int _syncWait()
 // 0x4F4EA0
 static void _MVE_sndPause()
 {
-#ifdef HAVE_DSOUND
-    if (gMovieLibDirectSoundBuffer != NULL) {
-        IDirectSoundBuffer_Stop(gMovieLibDirectSoundBuffer);
+    if (gMveSoundBuffer != -1) {
+        audioEngineSoundBufferStop(gMveSoundBuffer);
     }
-#endif
 }
 
 // 0x4F4EC0
@@ -1151,55 +1125,28 @@ static void _syncReset(int a1)
 // 0x4F5570
 static int _MVE_sndConfigure(int a1, int a2, int a3, int a4, int a5, int a6)
 {
-#ifdef HAVE_DSOUND
-    DSBUFFERDESC dsbd;
-    WAVEFORMATEX wfxFormat;
-
-    if (gMovieLibDirectSound == NULL) {
-        return 1;
-    }
-
     _MVE_sndReset();
 
     _snd_comp = a3;
     dword_6B36A0 = a5;
     _snd_buf = a6;
 
-    dsbd.dwSize = sizeof(DSBUFFERDESC);
-    dsbd.dwFlags = DSBCAPS_CTRLFREQUENCY | DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME;
-    dsbd.dwBufferBytes = (a2 + (a2 >> 1)) & 0xFFFFFFFC;
-    dsbd.dwReserved = 0;
-    dsbd.lpwfxFormat = &wfxFormat;
-
-    wfxFormat.wFormatTag = 1;
-    wfxFormat.nSamplesPerSec = a4;
-    wfxFormat.nChannels = 2 - (a3 < 1);
-    wfxFormat.nBlockAlign = wfxFormat.nChannels * (2 - (a5 < 1));
-    wfxFormat.cbSize = 0;
-    wfxFormat.nAvgBytesPerSec = wfxFormat.nSamplesPerSec * wfxFormat.nBlockAlign;
-    wfxFormat.wBitsPerSample = a5 < 1 ? 8 : 16;
+    gMveBufferBytes = (a2 + (a2 >> 1)) & 0xFFFFFFFC;
 
     dword_6B3AE4 = 0;
     dword_6B3660 = 0;
 
-    if (IDirectSound_CreateSoundBuffer(gMovieLibDirectSound, &dsbd, &gMovieLibDirectSoundBuffer, NULL) != DS_OK) {
+    gMveSoundBuffer = audioEngineCreateSoundBuffer(gMveBufferBytes, a5 < 1 ? 8 : 16, 2 - (a3 < 1), a4);
+    if (gMveSoundBuffer == -1) {
         return 0;
     }
 
-    IDirectSoundBuffer_SetVolume(gMovieLibDirectSoundBuffer, gMovieLibVolume);
-    IDirectSoundBuffer_SetPan(gMovieLibDirectSoundBuffer, gMovieLibPan);
+    audioEngineSoundBufferSetVolume(gMveSoundBuffer, gMovieLibVolume);
+    audioEngineSoundBufferSetPan(gMveSoundBuffer, gMovieLibPan);
 
     dword_6B36A4 = 0;
 
-    stru_6B3668.dwSize = sizeof(DSBCAPS);
-    if (IDirectSoundBuffer_GetCaps(gMovieLibDirectSoundBuffer, &stru_6B3668) != DS_OK) {
-        return 0;
-    }
-
     return 1;
-#else
-    return 0;
-#endif
 }
 
 // 0x4F56C0
@@ -1214,23 +1161,20 @@ static void _MVE_syncSync()
 // 0x4F56F0
 static void _MVE_sndReset()
 {
-#ifdef HAVE_DSOUND
-    if (gMovieLibDirectSoundBuffer != NULL) {
-        IDirectSoundBuffer_Stop(gMovieLibDirectSoundBuffer);
-        IDirectSoundBuffer_Release(gMovieLibDirectSoundBuffer);
-        gMovieLibDirectSoundBuffer = NULL;
+    if (gMveSoundBuffer != -1) {
+        audioEngineSoundBufferStop(gMveSoundBuffer);
+        audioEngineSoundBufferRelease(gMveSoundBuffer);
+        gMveSoundBuffer = -1;
     }
-#endif
 }
 
 // 0x4F5720
 static void _MVE_sndSync()
 {
-#ifdef HAVE_DSOUND
-    DWORD dwCurrentPlayCursor;
-    DWORD dwCurrentWriteCursor;
+    unsigned int dwCurrentPlayCursor;
+    unsigned int dwCurrentWriteCursor;
     bool v10;
-    DWORD dwStatus;
+    unsigned int dwStatus;
     unsigned int v1;
     bool v2;
     int v3;
@@ -1247,27 +1191,23 @@ static void _MVE_sndSync()
     _sync_late = _syncWaitLevel(_sync_wait_quanta >> 2) > -_sync_wait_quanta >> 1 && !_sync_FrameDropped;
     _sync_FrameDropped = 0;
 
-    if (gMovieLibDirectSound == NULL) {
-        return;
-    }
-
-    if (gMovieLibDirectSoundBuffer == NULL) {
+    if (gMveSoundBuffer == -1) {
         return;
     }
 
     while (1) {
-        if (IDirectSoundBuffer_GetStatus(gMovieLibDirectSoundBuffer, &dwStatus) != DS_OK) {
+        if (!audioEngineSoundBufferGetStatus(gMveSoundBuffer, &dwStatus)) {
             return;
         }
 
-        if (IDirectSoundBuffer_GetCurrentPosition(gMovieLibDirectSoundBuffer, &dwCurrentPlayCursor, &dwCurrentWriteCursor) != DS_OK) {
+        if (!audioEngineSoundBufferGetCurrentPosition(gMveSoundBuffer, &dwCurrentPlayCursor, &dwCurrentWriteCursor)) {
             return;
         }
 
         dwCurrentWriteCursor = dword_6B36A4;
 
-        v1 = (stru_6B3668.dwBufferBytes + dword_6B39E0[dword_6B3660] - _gSoundTimeBase)
-            % stru_6B3668.dwBufferBytes;
+        v1 = (gMveBufferBytes + dword_6B39E0[dword_6B3660] - _gSoundTimeBase)
+            % gMveBufferBytes;
 
         if (dwCurrentPlayCursor <= dword_6B36A4) {
             if (v1 < dwCurrentPlayCursor || v1 >= dword_6B36A4) {
@@ -1283,15 +1223,15 @@ static void _MVE_sndSync()
             }
         }
 
-        if (!v2 || !(dwStatus & DSBSTATUS_PLAYING)) {
+        if (!v2 || !(dwStatus & AUDIO_ENGINE_SOUND_BUFFER_STATUS_PLAYING)) {
             if (v0) {
                 _syncReset(_sync_wait_quanta + (_sync_wait_quanta >> 2));
             }
 
             v3 = dword_6B39E0[dword_6B3660];
 
-            if (!(dwStatus & DSBSTATUS_PLAYING)) {
-                v4 = (stru_6B3668.dwBufferBytes + v3) % stru_6B3668.dwBufferBytes;
+            if (!(dwStatus & AUDIO_ENGINE_SOUND_BUFFER_STATUS_PLAYING)) {
+                v4 = (gMveBufferBytes + v3) % gMveBufferBytes;
 
                 if (dwCurrentWriteCursor >= dwCurrentPlayCursor) {
                     if (v4 >= dwCurrentPlayCursor && v4 < dwCurrentWriteCursor) {
@@ -1306,11 +1246,11 @@ static void _MVE_sndSync()
                 }
 
                 if (v5) {
-                    if (IDirectSoundBuffer_SetCurrentPosition(gMovieLibDirectSoundBuffer, v4) != DS_OK) {
+                    if (!audioEngineSoundBufferSetCurrentPosition(gMveSoundBuffer, v4)) {
                         return;
                     }
 
-                    if (IDirectSoundBuffer_Play(gMovieLibDirectSoundBuffer, 0, 0, 1) != DS_OK) {
+                    if (!audioEngineSoundBufferPlay(gMveSoundBuffer, 1)) {
                         return;
                     }
                 }
@@ -1318,20 +1258,20 @@ static void _MVE_sndSync()
                 break;
             }
 
-            v6 = (stru_6B3668.dwBufferBytes + _gSoundTimeBase + v3) % stru_6B3668.dwBufferBytes;
+            v6 = (gMveBufferBytes + _gSoundTimeBase + v3) % gMveBufferBytes;
             v7 = dwCurrentWriteCursor - dwCurrentPlayCursor;
 
             if (((dwCurrentWriteCursor - dwCurrentPlayCursor) & 0x80000000) != 0) {
-                v7 += stru_6B3668.dwBufferBytes;
+                v7 += gMveBufferBytes;
             }
 
-            v8 = stru_6B3668.dwBufferBytes - v7 - 1;
+            v8 = gMveBufferBytes - v7 - 1;
             // NOTE: Original code uses signed comparison.
-            if ((int)stru_6B3668.dwBufferBytes / 2 < v8) {
-                v8 = stru_6B3668.dwBufferBytes >> 1;
+            if ((int)gMveBufferBytes / 2 < v8) {
+                v8 = gMveBufferBytes >> 1;
             }
 
-            v9 = (stru_6B3668.dwBufferBytes + dwCurrentPlayCursor - v8) % stru_6B3668.dwBufferBytes;
+            v9 = (gMveBufferBytes + dwCurrentPlayCursor - v8) % gMveBufferBytes;
 
             dwCurrentPlayCursor = v9;
 
@@ -1350,7 +1290,7 @@ static void _MVE_sndSync()
             }
 
             if (!v10) {
-                IDirectSoundBuffer_Stop(gMovieLibDirectSoundBuffer);
+                audioEngineSoundBufferStop(gMveSoundBuffer);
             }
 
             break;
@@ -1365,10 +1305,6 @@ static void _MVE_sndSync()
             ++dword_6B3660;
         }
     }
-#else
-    _sync_late = _syncWaitLevel(_sync_wait_quanta >> 2) > -_sync_wait_quanta >> 1 && !_sync_FrameDropped;
-    _sync_FrameDropped = 0;
-#endif
 }
 
 // 0x4F59B0
@@ -1394,20 +1330,19 @@ static int _syncWaitLevel(int a1)
 // 0x4F5A00
 static void _CallsSndBuff_Loc(unsigned char* a1, int a2)
 {
-#ifdef HAVE_DSOUND
     int v2;
     int v3;
     int v5;
-    DWORD dwCurrentPlayCursor;
-    DWORD dwCurrentWriteCursor;
-    LPVOID lpvAudioPtr1;
-    DWORD dwAudioBytes1;
-    LPVOID lpvAudioPtr2;
-    DWORD dwAudioBytes2;
+    unsigned int dwCurrentPlayCursor;
+    unsigned int dwCurrentWriteCursor;
+    void* lpvAudioPtr1;
+    unsigned int dwAudioBytes1;
+    void* lpvAudioPtr2;
+    unsigned int dwAudioBytes2;
 
     _gSoundTimeBase = a2;
 
-    if (gMovieLibDirectSoundBuffer == NULL) {
+    if (gMveSoundBuffer == -1) {
         return;
     }
 
@@ -1420,13 +1355,13 @@ static void _CallsSndBuff_Loc(unsigned char* a1, int a2)
         return;
     }
 
-    if (IDirectSoundBuffer_GetCurrentPosition(gMovieLibDirectSoundBuffer, &dwCurrentPlayCursor, &dwCurrentWriteCursor) != DS_OK) {
+    if (!audioEngineSoundBufferGetCurrentPosition(gMveSoundBuffer, &dwCurrentPlayCursor, &dwCurrentWriteCursor)) {
         return;
     }
 
     dwCurrentWriteCursor = dword_6B36A4;
 
-    if (IDirectSoundBuffer_Lock(gMovieLibDirectSoundBuffer, dword_6B36A4, a2, &lpvAudioPtr1, &dwAudioBytes1, &lpvAudioPtr2, &dwAudioBytes2, 0) != DS_OK) {
+    if (!audioEngineSoundBufferLock(gMveSoundBuffer, dword_6B36A4, a2, &lpvAudioPtr1, &dwAudioBytes1, &lpvAudioPtr2, &dwAudioBytes2, 0)) {
         return;
     }
 
@@ -1443,11 +1378,11 @@ static void _CallsSndBuff_Loc(unsigned char* a1, int a2)
         dword_6B36A4 = dwAudioBytes2;
     }
 
-    if (dword_6B36A4 == stru_6B3668.dwBufferBytes) {
+    if (dword_6B36A4 == gMveBufferBytes) {
         dword_6B36A4 = 0;
     }
 
-    IDirectSoundBuffer_Unlock(gMovieLibDirectSoundBuffer, lpvAudioPtr1, dwAudioBytes1, lpvAudioPtr2, dwAudioBytes2);
+    audioEngineSoundBufferUnlock(gMveSoundBuffer, lpvAudioPtr1, dwAudioBytes1, lpvAudioPtr2, dwAudioBytes2);
 
     dword_6B39E0[dword_6B3AE4] = dwCurrentWriteCursor;
 
@@ -1456,7 +1391,6 @@ static void _CallsSndBuff_Loc(unsigned char* a1, int a2)
     } else {
         ++dword_6B3AE4;
     }
-#endif
 }
 
 // 0x4F5B70

src/movie_lib.h

@@ -1,7 +1,6 @@
 #ifndef MOVIE_LIB_H
 #define MOVIE_LIB_H
 
-#include "dsound_compat.h"
 #include "memory_defs.h"
 
 #include <SDL.h>
@@ -11,9 +10,6 @@ typedef void(MovieShowFrameProc)(SDL_Surface*, int, int, int, int, int, int, int
 
 void movieLibSetMemoryProcs(MallocProc* mallocProc, FreeProc* freeProc);
 void movieLibSetReadProc(MovieReadProc* readProc);
-#ifdef HAVE_DSOUND
-void movieLibSetDirectSound(LPDIRECTSOUND ds);
-#endif
 void movieLibSetVolume(int volume);
 void movieLibSetPan(int pan);
 void _MVE_sfSVGA(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8, int a9);

src/sound.h

@@ -41,8 +41,6 @@ typedef enum SoundError {
     SOUND_INVALID_HANDLE = 30,
     SOUND_NO_MEMORY_AVAILABLE = 31,
     SOUND_UNKNOWN_ERROR = 32,
-    // TODO: Remove once DirectX -> SDL transition is completed.
-    SOUND_NOT_IMPLEMENTED = 33,
     SOUND_ERR_COUNT,
 } SoundError;
 
@@ -70,10 +68,10 @@ typedef void SoundCallback(void* userData, int a2);
 typedef struct Sound {
     SoundFileIO io;
     unsigned char* field_20;
-#ifdef HAVE_DSOUND
-    LPDIRECTSOUNDBUFFER directSoundBuffer;
-    DSBUFFERDESC directSoundBufferDescription;
-#endif
+    int soundBuffer;
+    int bitsPerSample;
+    int channels;
+    int rate;
     int field_3C;
     // flags
     int field_40;
@@ -91,9 +89,7 @@ typedef struct Sound {
     int field_68;
     int readLimit;
     int field_70;
-#ifdef HAVE_DSOUND
-    DWORD field_74;
-#endif
+    unsigned int field_74;
     int field_78;
     int field_7C;
     int field_80;
@@ -106,10 +102,6 @@ typedef struct Sound {
     struct Sound* prev;
 } Sound;
 
-#ifdef HAVE_DSOUND
-extern LPDIRECTSOUND gDirectSound;
-#endif
-
 void soundSetMemoryProcs(MallocProc* mallocProc, ReallocProc* reallocProc, FreeProc* freeProc);
 const char* soundGetErrorDescription(int err);
 int soundInit(int a1, int a2, int a3, int a4, int rate);

src/win32.cc

@@ -8,77 +8,26 @@
 #include <stdlib.h>
 
 #ifdef _WIN32
-#ifdef HAVE_DSOUND
-// 0x51E430
-DirectSoundCreateProc* gDirectSoundCreateProc = NULL;
-#endif
-
-// 0x51E434
-HWND gProgramWindow = NULL;
-
 // 0x51E444
 bool gProgramIsActive = false;
 
 // GNW95MUTEX
 HANDLE _GNW95_mutex = NULL;
 
-#ifdef HAVE_DSOUND
-// 0x51E454
-HMODULE gDSoundDLL = NULL;
-#endif
-
 // 0x4DE700
 int main(int argc, char* argv[])
 {
     _GNW95_mutex = CreateMutexA(0, TRUE, "GNW95MUTEX");
     if (GetLastError() == ERROR_SUCCESS) {
         SDL_ShowCursor(SDL_DISABLE);
-        if (_LoadDirectX()) {
-            gProgramIsActive = true;
-            falloutMain(argc, argv);
-        }
+
+        gProgramIsActive = true;
+        falloutMain(argc, argv);
+
         CloseHandle(_GNW95_mutex);
     }
     return 0;
 }
-
-// 0x4DE8D0
-bool _LoadDirectX()
-{
-#ifdef HAVE_DSOUND
-    gDSoundDLL = LoadLibraryA("DSOUND.DLL");
-    if (gDSoundDLL == NULL) {
-        goto err;
-    }
-
-    gDirectSoundCreateProc = (DirectSoundCreateProc*)GetProcAddress(gDSoundDLL, "DirectSoundCreate");
-    if (gDirectSoundCreateProc == NULL) {
-        goto err;
-    }
-#endif
-
-    atexit(_UnloadDirectX);
-
-    return true;
-
-err:
-    _UnloadDirectX();
-
-    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Could not load DirectX", "This program requires DirectX 3.0a or later.", NULL);
-
-    return false;
-}
-
-// 0x4DE988
-void _UnloadDirectX(void)
-{
-#ifdef HAVE_DSOUND
-    if (gDSoundDLL != NULL) {
-        FreeLibrary(gDSoundDLL);
-        gDSoundDLL = NULL;
-    }
-#endif
-}
 #else
 bool gProgramIsActive = false;
 

src/win32.h

@@ -1,28 +1,13 @@
 #ifndef WIN32_H
 #define WIN32_H
 
-#include "dsound_compat.h"
-
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
 #define NOMINMAX
 #include <windows.h>
 
-#ifdef HAVE_DSOUND
-typedef HRESULT(__stdcall DirectSoundCreateProc)(GUID*, LPDIRECTSOUND*, IUnknown*);
-#endif
-
-#ifdef HAVE_DSOUND
-extern DirectSoundCreateProc* gDirectSoundCreateProc;
-#endif
-extern HWND gProgramWindow;
 extern bool gProgramIsActive;
 extern HANDLE _GNW95_mutex;
-#ifdef HAVE_DSOUND
-extern HMODULE gDSoundDLL;
-#endif
-bool _LoadDirectX();
-void _UnloadDirectX(void);
 #else
 extern bool gProgramIsActive;
 #endif