Mercurial > sdl-ios-xcode

diff src/audio/dc/SDL_dcaudio.c @ 1662:782fd950bd46 SDL-1.3

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Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents 11134dc42da8
children 4da1ee79c9af
line wrap: on
line diff
--- a/src/audio/dc/SDL_dcaudio.c	Sun May 21 17:27:13 2006 +0000
+++ b/src/audio/dc/SDL_dcaudio.c	Sun May 28 13:04:16 2006 +0000
@@ -35,195 +35,220 @@
 #include <dc/spu.h>
 
 /* Audio driver functions */
-static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void DCAUD_WaitAudio(_THIS);
-static void DCAUD_PlayAudio(_THIS);
-static Uint8 *DCAUD_GetAudioBuf(_THIS);
-static void DCAUD_CloseAudio(_THIS);
+static int DCAUD_OpenAudio (_THIS, SDL_AudioSpec * spec);
+static void DCAUD_WaitAudio (_THIS);
+static void DCAUD_PlayAudio (_THIS);
+static Uint8 *DCAUD_GetAudioBuf (_THIS);
+static void DCAUD_CloseAudio (_THIS);
 
 /* Audio driver bootstrap functions */
-static int DCAUD_Available(void)
+static int
+DCAUD_Available (void)
 {
-	return 1;
+    return 1;
 }
 
-static void DCAUD_DeleteDevice(SDL_AudioDevice *device)
+static void
+DCAUD_DeleteDevice (SDL_AudioDevice * device)
 {
-	SDL_free(device->hidden);
-	SDL_free(device);
+    SDL_free (device->hidden);
+    SDL_free (device);
 }
 
-static SDL_AudioDevice *DCAUD_CreateDevice(int devindex)
+static SDL_AudioDevice *
+DCAUD_CreateDevice (int devindex)
 {
-	SDL_AudioDevice *this;
+    SDL_AudioDevice *this;
 
-	/* Initialize all variables that we clean on shutdown */
-	this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
-	if ( this ) {
-		SDL_memset(this, 0, (sizeof *this));
-		this->hidden = (struct SDL_PrivateAudioData *)
-				SDL_malloc((sizeof *this->hidden));
-	}
-	if ( (this == NULL) || (this->hidden == NULL) ) {
-		SDL_OutOfMemory();
-		if ( this ) {
-			SDL_free(this);
-		}
-		return(0);
-	}
-	SDL_memset(this->hidden, 0, (sizeof *this->hidden));
+    /* Initialize all variables that we clean on shutdown */
+    this = (SDL_AudioDevice *) SDL_malloc (sizeof (SDL_AudioDevice));
+    if (this) {
+        SDL_memset (this, 0, (sizeof *this));
+        this->hidden = (struct SDL_PrivateAudioData *)
+            SDL_malloc ((sizeof *this->hidden));
+    }
+    if ((this == NULL) || (this->hidden == NULL)) {
+        SDL_OutOfMemory ();
+        if (this) {
+            SDL_free (this);
+        }
+        return (0);
+    }
+    SDL_memset (this->hidden, 0, (sizeof *this->hidden));
 
-	/* Set the function pointers */
-	this->OpenAudio = DCAUD_OpenAudio;
-	this->WaitAudio = DCAUD_WaitAudio;
-	this->PlayAudio = DCAUD_PlayAudio;
-	this->GetAudioBuf = DCAUD_GetAudioBuf;
-	this->CloseAudio = DCAUD_CloseAudio;
+    /* Set the function pointers */
+    this->OpenAudio = DCAUD_OpenAudio;
+    this->WaitAudio = DCAUD_WaitAudio;
+    this->PlayAudio = DCAUD_PlayAudio;
+    this->GetAudioBuf = DCAUD_GetAudioBuf;
+    this->CloseAudio = DCAUD_CloseAudio;
 
-	this->free = DCAUD_DeleteDevice;
+    this->free = DCAUD_DeleteDevice;
 
-	spu_init();
+    spu_init ();
 
-	return this;
+    return this;
 }
 
 AudioBootStrap DCAUD_bootstrap = {
-	"dcaudio", "Dreamcast AICA audio",
-	DCAUD_Available, DCAUD_CreateDevice
+    "dcaudio", "Dreamcast AICA audio",
+    DCAUD_Available, DCAUD_CreateDevice
 };
 
 /* This function waits until it is possible to write a full sound buffer */
-static void DCAUD_WaitAudio(_THIS)
+static void
+DCAUD_WaitAudio (_THIS)
 {
-	if (this->hidden->playing) {
-		/* wait */
-		while(aica_get_pos(0)/this->spec.samples == this->hidden->nextbuf) {
-			thd_pass();
-		}
-	}
+    if (this->hidden->playing) {
+        /* wait */
+        while (aica_get_pos (0) / this->spec.samples == this->hidden->nextbuf) {
+            thd_pass ();
+        }
+    }
 }
 
 #define	SPU_RAM_BASE	0xa0800000
 
-static void spu_memload_stereo8(int leftpos,int rightpos,void *src0,size_t size)
+static void
+spu_memload_stereo8 (int leftpos, int rightpos, void *src0, size_t size)
 {
-	uint8 *src = src0;
-	uint32 *left  = (uint32*)(leftpos +SPU_RAM_BASE);
-	uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
-	size = (size+7)/8;
-	while(size--) {
-		unsigned lval,rval;
-		lval = *src++;
-		rval = *src++;
-		lval|= (*src++)<<8;
-		rval|= (*src++)<<8;
-		lval|= (*src++)<<16;
-		rval|= (*src++)<<16;
-		lval|= (*src++)<<24;
-		rval|= (*src++)<<24;
-		g2_write_32(left++,lval);
-		g2_write_32(right++,rval);
-		g2_fifo_wait();
-	}
+    uint8 *src = src0;
+    uint32 *left = (uint32 *) (leftpos + SPU_RAM_BASE);
+    uint32 *right = (uint32 *) (rightpos + SPU_RAM_BASE);
+    size = (size + 7) / 8;
+    while (size--) {
+        unsigned lval, rval;
+        lval = *src++;
+        rval = *src++;
+        lval |= (*src++) << 8;
+        rval |= (*src++) << 8;
+        lval |= (*src++) << 16;
+        rval |= (*src++) << 16;
+        lval |= (*src++) << 24;
+        rval |= (*src++) << 24;
+        g2_write_32 (left++, lval);
+        g2_write_32 (right++, rval);
+        g2_fifo_wait ();
+    }
 }
 
-static void spu_memload_stereo16(int leftpos,int rightpos,void *src0,size_t size)
+static void
+spu_memload_stereo16 (int leftpos, int rightpos, void *src0, size_t size)
 {
-	uint16 *src = src0;
-	uint32 *left  = (uint32*)(leftpos +SPU_RAM_BASE);
-	uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
-	size = (size+7)/8;
-	while(size--) {
-		unsigned lval,rval;
-		lval = *src++;
-		rval = *src++;
-		lval|= (*src++)<<16;
-		rval|= (*src++)<<16;
-		g2_write_32(left++,lval);
-		g2_write_32(right++,rval);
-		g2_fifo_wait();
-	}
+    uint16 *src = src0;
+    uint32 *left = (uint32 *) (leftpos + SPU_RAM_BASE);
+    uint32 *right = (uint32 *) (rightpos + SPU_RAM_BASE);
+    size = (size + 7) / 8;
+    while (size--) {
+        unsigned lval, rval;
+        lval = *src++;
+        rval = *src++;
+        lval |= (*src++) << 16;
+        rval |= (*src++) << 16;
+        g2_write_32 (left++, lval);
+        g2_write_32 (right++, rval);
+        g2_fifo_wait ();
+    }
 }
 
-static void DCAUD_PlayAudio(_THIS)
+static void
+DCAUD_PlayAudio (_THIS)
 {
-	SDL_AudioSpec *spec = &this->spec;
-	unsigned int offset;
+    SDL_AudioSpec *spec = &this->spec;
+    unsigned int offset;
 
-	if (this->hidden->playing) {
-		/* wait */
-		while(aica_get_pos(0)/spec->samples == this->hidden->nextbuf) {
-			thd_pass();
-		}
-	}
+    if (this->hidden->playing) {
+        /* wait */
+        while (aica_get_pos (0) / spec->samples == this->hidden->nextbuf) {
+            thd_pass ();
+        }
+    }
 
-	offset = this->hidden->nextbuf*spec->size;
-	this->hidden->nextbuf^=1;
-	/* Write the audio data, checking for EAGAIN on broken audio drivers */
-	if (spec->channels==1) {
-		spu_memload(this->hidden->leftpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
-	} else {
-		offset/=2;
-		if ((this->spec.format&255)==8) {
-			spu_memload_stereo8(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
-		} else {
-			spu_memload_stereo16(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
-		}
-	}
+    offset = this->hidden->nextbuf * spec->size;
+    this->hidden->nextbuf ^= 1;
+    /* Write the audio data, checking for EAGAIN on broken audio drivers */
+    if (spec->channels == 1) {
+        spu_memload (this->hidden->leftpos + offset, this->hidden->mixbuf,
+                     this->hidden->mixlen);
+    } else {
+        offset /= 2;
+        if ((this->spec.format & 255) == 8) {
+            spu_memload_stereo8 (this->hidden->leftpos + offset,
+                                 this->hidden->rightpos + offset,
+                                 this->hidden->mixbuf, this->hidden->mixlen);
+        } else {
+            spu_memload_stereo16 (this->hidden->leftpos + offset,
+                                  this->hidden->rightpos + offset,
+                                  this->hidden->mixbuf, this->hidden->mixlen);
+        }
+    }
 
-	if (!this->hidden->playing) {
-		int mode;
-		this->hidden->playing = 1;
-		mode = (spec->format==AUDIO_S8)?SM_8BIT:SM_16BIT;
-		if (spec->channels==1) {
-			aica_play(0,mode,this->hidden->leftpos,0,spec->samples*2,spec->freq,255,128,1);
-		} else {
-			aica_play(0,mode,this->hidden->leftpos ,0,spec->samples*2,spec->freq,255,0,1);
-			aica_play(1,mode,this->hidden->rightpos,0,spec->samples*2,spec->freq,255,255,1);
-		}
-	}
+    if (!this->hidden->playing) {
+        int mode;
+        this->hidden->playing = 1;
+        mode = (spec->format == AUDIO_S8) ? SM_8BIT : SM_16BIT;
+        if (spec->channels == 1) {
+            aica_play (0, mode, this->hidden->leftpos, 0,
+                       spec->samples * 2, spec->freq, 255, 128, 1);
+        } else {
+            aica_play (0, mode, this->hidden->leftpos, 0,
+                       spec->samples * 2, spec->freq, 255, 0, 1);
+            aica_play (1, mode, this->hidden->rightpos, 0,
+                       spec->samples * 2, spec->freq, 255, 255, 1);
+        }
+    }
 }
 
-static Uint8 *DCAUD_GetAudioBuf(_THIS)
+static Uint8 *
+DCAUD_GetAudioBuf (_THIS)
 {
-	return(this->hidden->mixbuf);
+    return (this->hidden->mixbuf);
 }
 
-static void DCAUD_CloseAudio(_THIS)
+static void
+DCAUD_CloseAudio (_THIS)
 {
-	aica_stop(0);
-	if (this->spec.channels==2) aica_stop(1);
-	if ( this->hidden->mixbuf != NULL ) {
-		SDL_FreeAudioMem(this->hidden->mixbuf);
-		this->hidden->mixbuf = NULL;
-	}
+    aica_stop (0);
+    if (this->spec.channels == 2)
+        aica_stop (1);
+    if (this->hidden->mixbuf != NULL) {
+        SDL_FreeAudioMem (this->hidden->mixbuf);
+        this->hidden->mixbuf = NULL;
+    }
 }
 
-static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
+static int
+DCAUD_OpenAudio (_THIS, SDL_AudioSpec * spec)
 {
-	switch(spec->format&0xff) {
-	case  8: spec->format = AUDIO_S8; break;
-	case 16: spec->format = AUDIO_S16LSB; break;
-	default:
-		SDL_SetError("Unsupported audio format");
-		return(-1);
-	}
+    switch (spec->format & 0xff) {
+    case 8:
+        spec->format = AUDIO_S8;
+        break;
+    case 16:
+        spec->format = AUDIO_S16LSB;
+        break;
+    default:
+        SDL_SetError ("Unsupported audio format");
+        return (-1);
+    }
 
-	/* Update the fragment size as size in bytes */
-	SDL_CalculateAudioSpec(spec);
+    /* Update the fragment size as size in bytes */
+    SDL_CalculateAudioSpec (spec);
 
-	/* Allocate mixing buffer */
-	this->hidden->mixlen = spec->size;
-	this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
-	if ( this->hidden->mixbuf == NULL ) {
-		return(-1);
-	}
-	SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);
-	this->hidden->leftpos = 0x11000;
-	this->hidden->rightpos = 0x11000+spec->size;
-	this->hidden->playing = 0;
-	this->hidden->nextbuf = 0;
+    /* Allocate mixing buffer */
+    this->hidden->mixlen = spec->size;
+    this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem (this->hidden->mixlen);
+    if (this->hidden->mixbuf == NULL) {
+        return (-1);
+    }
+    SDL_memset (this->hidden->mixbuf, spec->silence, spec->size);
+    this->hidden->leftpos = 0x11000;
+    this->hidden->rightpos = 0x11000 + spec->size;
+    this->hidden->playing = 0;
+    this->hidden->nextbuf = 0;
 
-	/* We're ready to rock and roll. :-) */
-	return(0);
+    /* We're ready to rock and roll. :-) */
+    return (0);
 }
+
+/* vi: set ts=4 sw=4 expandtab: */