Added x86 asm and C wav writer and player examples.

Specifically:
* Added win32, elf32 and elf64 asm player and wav writers using winmm.
* Added dsound player in C.
* Separated the ALL target and the examples; introduced a new examples target.

examples/code/C/cplay.windows.directsound.c

@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <stdint.h>
+#include "physics_girl_st.h"
+#define WIN32_LEAN_AND_MEAN
+#define WIN32_EXTRA_LEAN
+#include <Windows.h>
+#include "mmsystem.h"
+#include "mmreg.h"
+#define CINTERFACE
+#include <dsound.h>
+
+#ifndef DSBCAPS_TRUEPLAYPOSITION // Not defined in MinGW dsound headers, so let's add it
+#define DSBCAPS_TRUEPLAYPOSITION 0x00080000
+#endif
+
+SUsample sound_buffer[SU_LENGTH_IN_SAMPLES * SU_CHANNEL_COUNT];
+WAVEFORMATEX wave_format = {
+#ifdef SU_SAMPLE_FLOAT
+	WAVE_FORMAT_IEEE_FLOAT,
+#else
+	WAVE_FORMAT_PCM,
+#endif
+	SU_CHANNEL_COUNT,
+	SU_SAMPLE_RATE,
+	SU_SAMPLE_RATE * SU_SAMPLE_SIZE * SU_CHANNEL_COUNT,
+	SU_SAMPLE_SIZE * SU_CHANNEL_COUNT,
+	SU_SAMPLE_SIZE*8,
+	0
+};
+DSBUFFERDESC buffer_description = {
+	sizeof(DSBUFFERDESC),
+	DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS | DSBCAPS_TRUEPLAYPOSITION,
+	SU_LENGTH_IN_SAMPLES * SU_SAMPLE_SIZE * SU_CHANNEL_COUNT,
+	0,
+	&wave_format,
+	0
+};
+
+int main(int argc, char **args) {
+	// Load gm.dls if necessary.
+#ifdef SU_LOAD_GMDLS
+	su_load_gmdls();
+#endif // SU_LOAD_GMDLS
+
+	HWND hWnd = GetForegroundWindow();
+	if(hWnd == NULL) {
+		hWnd = GetDesktopWindow();
+	}
+
+	LPDIRECTSOUND direct_sound;
+	LPDIRECTSOUNDBUFFER direct_sound_buffer;
+	DirectSoundCreate(0, &direct_sound, 0);
+	IDirectSound_SetCooperativeLevel(direct_sound, hWnd, DSSCL_PRIORITY);
+	IDirectSound_CreateSoundBuffer(direct_sound, &buffer_description, &direct_sound_buffer, NULL);
+	
+	LPVOID p1;
+	DWORD l1;
+	IDirectSoundBuffer_Lock(direct_sound_buffer, 0, SU_LENGTH_IN_SAMPLES * SU_CHANNEL_COUNT * SU_SAMPLE_SIZE, &p1, &l1, NULL, NULL, 0);
+	CreateThread(0, 0, (LPTHREAD_START_ROUTINE)su_render_song, p1, 0, 0);
+	IDirectSoundBuffer_Play(direct_sound_buffer, 0, 0, 0);
+
+	// We need to handle windows messages properly while playing, as waveOutWrite is async.
+	MSG msg = {0};
+	DWORD last_play_cursor = 0;
+	for(DWORD play_cursor = 0; play_cursor >= last_play_cursor; IDirectSoundBuffer_GetCurrentPosition(direct_sound_buffer, (DWORD*)&play_cursor, NULL)) {
+		while (PeekMessageA(&msg, NULL, 0, 0, PM_REMOVE)) {
+			TranslateMessage(&msg);
+			DispatchMessageA(&msg);
+		}
+
+		last_play_cursor = play_cursor;
+	}
+
+	return 0;
+}