improvements to video/audio threading

SDL/src/audio/wii/SDL_wiiaudio.c

@@ -44,8 +44,10 @@ static Uint8 whichab = 0;
 
 #define AUDIOSTACK 16384*2
 static lwpq_t audioqueue;
-static lwp_t athread;
+static lwp_t athread = LWP_THREAD_NULL;
 static Uint8 astack[AUDIOSTACK];
+static bool stopaudio = false;
+static int currentfreq;
 
 /****************************************************************************
  * Audio Threading
@@ -53,10 +55,11 @@ static Uint8 astack[AUDIOSTACK];
 static void *
 AudioThread (void *arg)
 {
-	LWP_InitQueue (&audioqueue);
-
 	while (1)
 	{
+		if(stopaudio)
+			break;
+
 		whichab ^= 1;
 		memset(dma_buffers[whichab], 0, sizeof(dma_buffers[0]));
 
@@ -92,7 +95,6 @@ AudioThread (void *arg)
 		}
 		LWP_ThreadSleep (audioqueue);
 	}
-
 	return NULL;
 }
 
@@ -107,10 +109,37 @@ DMACallback()
 	DCFlushRange (dma_buffers[whichab], sizeof(dma_buffers[0]));
 	AUDIO_InitDMA ((Uint32)dma_buffers[whichab], SAMPLES_PER_DMA_BUFFER*4);
 	AUDIO_StartDMA ();
-
 	LWP_ThreadSignal (audioqueue);
 }
 
+void WII_AudioStop()
+{
+	AUDIO_StopDMA ();
+	AUDIO_RegisterDMACallback(0);
+	stopaudio = true;
+	LWP_ThreadSignal(audioqueue);
+	LWP_JoinThread(athread, NULL);
+	LWP_CloseQueue (audioqueue);
+	athread = LWP_THREAD_NULL;
+}
+
+void WII_AudioStart()
+{
+	if (currentfreq == 32000)
+		AUDIO_SetDSPSampleRate(AI_SAMPLERATE_32KHZ);
+	else
+		AUDIO_SetDSPSampleRate(AI_SAMPLERATE_48KHZ);
+
+	// startup conversion thread
+	stopaudio = false;
+	LWP_InitQueue (&audioqueue);
+	LWP_CreateThread (&athread, AudioThread, NULL, astack, AUDIOSTACK, 67);
+
+	// Start the first chunk of audio playing
+	AUDIO_RegisterDMACallback(DMACallback);
+	DMACallback();
+}
+
 static int WIIAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
 {
 	if (spec->freq != 32000 && spec->freq != 48000)
@@ -126,16 +155,8 @@ static int WIIAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
 	memset(dma_buffers[0], 0, sizeof(dma_buffers[0]));
 	memset(dma_buffers[1], 0, sizeof(dma_buffers[0]));
 
-	if (spec->freq == 32000)
+	currentfreq = spec->freq;
-		AUDIO_SetDSPSampleRate(AI_SAMPLERATE_32KHZ);
+	WII_AudioStart();
-	else
-		AUDIO_SetDSPSampleRate(AI_SAMPLERATE_48KHZ);
-
-	// startup conversion thread
-	LWP_CreateThread (&athread, AudioThread, NULL, astack, AUDIOSTACK, 90);
-
-	// Start the first chunk of audio playing
-	DMACallback();
 
 	return 1;
 }
@@ -201,7 +222,6 @@ static SDL_AudioDevice *WIIAUD_CreateDevice(int devindex)
 
 	// Initialise the Wii side of the audio system
 	AUDIO_Init(0);
-	AUDIO_RegisterDMACallback(DMACallback);
 
 	/* Set the function pointers */
 	this->OpenAudio = WIIAUD_OpenAudio;

SDL/src/video/wii/SDL_wiivideo.c

@@ -39,7 +39,7 @@
 #include "SDL_wiievents_c.h"
 
 static const char	WIIVID_DRIVER_NAME[] = "wii";
-static SDL_Thread * videothread = 0;
+static lwp_t videothread = LWP_THREAD_NULL;
 static SDL_mutex * videomutex = 0;
 
 /*** SDL ***/
@@ -60,7 +60,8 @@ static SDL_Rect* modes_descending[] =
 
 unsigned int *xfb[2] = { NULL, NULL }; // Double buffered
 int whichfb = 0; // Switch
-static GXRModeObj* vmode = 0;
+GXRModeObj* vmode = 0;
+u8 * screenTex = NULL; // screen capture
 static unsigned char texturemem[TEXTUREMEM_SIZE] __attribute__((aligned(32))); // GX texture
 static unsigned char textureconvert[TEXTUREMEM_SIZE] __attribute__((aligned(32))); // 565 mem
 
@@ -173,34 +174,61 @@ draw_square (Mtx v)
 	GX_End ();
 }
 
+/****************************************************************************
+ * TakeScreenshot
+ *
+ * Copies the current screen into a GX texture
+ ***************************************************************************/
+
+static void TakeScreenshot()
+{
+	int texSize = vmode->fbWidth * vmode->efbHeight * 4;
+
+	if(screenTex) free(screenTex);
+	screenTex = (u8 *)memalign(32, texSize);
+	if(screenTex == NULL) return;
+	GX_SetTexCopySrc(0, 0, vmode->fbWidth, vmode->efbHeight);
+	GX_SetTexCopyDst(vmode->fbWidth, vmode->efbHeight, GX_TF_RGBA8, GX_FALSE);
+	GX_CopyTex(screenTex, GX_FALSE);
+	GX_PixModeSync();
+	DCFlushRange(screenTex, texSize);
+}
+
 static int quit_flip_thread = 0;
 int flip_thread(void * arg)
 {
 	while(1)
 	{
-		if (quit_flip_thread)
+		if(quit_flip_thread == 2)
 			break;
 
-		whichfb ^= 1;
-
-		SDL_mutexP(videomutex);
-
 		// clear texture objects
 		GX_InvVtxCache();
 		GX_InvalidateTexAll();
 		
+		SDL_mutexP(videomutex);
+
 		// load texture into GX
 		DCFlushRange(texturemem, TEXTUREMEM_SIZE);
 
-		GX_SetNumChans(1);
 		GX_LoadTexObj(&texobj, GX_TEXMAP0);
 
 		draw_square(view); // render textured quad
-		GX_CopyDisp(xfb[whichfb], GX_TRUE);
 		GX_DrawDone ();
+		GX_SetColorUpdate(GX_TRUE);
 		
 		SDL_mutexV(videomutex);
 
+		if (quit_flip_thread == 1)
+		{
+			quit_flip_thread = 2;
+			TakeScreenshot();
+		}
+		
+		whichfb ^= 1;
+
+		GX_CopyDisp(xfb[whichfb], GX_TRUE);
+
 		VIDEO_SetNextFramebuffer(xfb[whichfb]);
 		VIDEO_Flush();
 		VIDEO_WaitVSync();
@@ -212,7 +240,7 @@ static void
 SetupGX()
 {
 	Mtx44 p;
-	int df = 1;
+	int df = 1; // deflicker on/off
 
 	GX_SetViewport (0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1);
 	GX_SetDispCopyYScale ((f32) vmode->xfbHeight / (f32) vmode->efbHeight);
@@ -220,7 +248,7 @@ SetupGX()
 
 	GX_SetDispCopySrc (0, 0, vmode->fbWidth, vmode->efbHeight);
 	GX_SetDispCopyDst (vmode->fbWidth, vmode->xfbHeight);
-	GX_SetCopyFilter (vmode->aa, vmode->sample_pattern, (df == 1) ? GX_TRUE : GX_FALSE, vmode->vfilter); // deflicker ON only for filtered mode
+	GX_SetCopyFilter (vmode->aa, vmode->sample_pattern, (df == 1) ? GX_TRUE : GX_FALSE, vmode->vfilter);
 
 	GX_SetFieldMode (vmode->field_rendering, ((vmode->viHeight == 2 * vmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
 	GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
@@ -230,6 +258,7 @@ SetupGX()
 
 	GX_SetZMode (GX_TRUE, GX_LEQUAL, GX_TRUE);
 	GX_SetColorUpdate (GX_TRUE);
+	GX_SetNumChans(1);
 
 	guOrtho(p, 480/2, -(480/2), -(640/2), 640/2, 100, 1000); // matrix, t, b, l, r, n, f
 	GX_LoadProjectionMtx (p, GX_ORTHOGRAPHIC);
@@ -238,10 +267,10 @@ SetupGX()
 static void
 StartVideoThread()
 {
-	if(videothread == 0)
+	if(videothread == LWP_THREAD_NULL)
 	{
 		quit_flip_thread = 0;
-		videothread = SDL_CreateThread(flip_thread, NULL);
+		LWP_CreateThread (&videothread, flip_thread, NULL, NULL, 0, 68);
 	}
 }
 
@@ -730,8 +759,8 @@ void WII_VideoStart()
 void WII_VideoStop()
 {
 	quit_flip_thread = 1;
-	SDL_WaitThread(videothread, NULL);
+	LWP_JoinThread(videothread, NULL);
-	videothread = 0;
+	videothread = LWP_THREAD_NULL;
 }
 
 void WII_VideoQuit(_THIS)