Mercurial > sdl-ios-xcode

diff src/audio/nas/SDL_nasaudio.c @ 1662:782fd950bd46 SDL-1.3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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 d910939febfa
children 4da1ee79c9af
line wrap: on
line diff
--- a/src/audio/nas/SDL_nasaudio.c	Sun May 21 17:27:13 2006 +0000
+++ b/src/audio/nas/SDL_nasaudio.c	Sun May 28 13:04:16 2006 +0000
@@ -43,257 +43,275 @@
 static struct SDL_PrivateAudioData *this2 = NULL;
 
 /* Audio driver functions */
-static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void NAS_WaitAudio(_THIS);
-static void NAS_PlayAudio(_THIS);
-static Uint8 *NAS_GetAudioBuf(_THIS);
-static void NAS_CloseAudio(_THIS);
+static int NAS_OpenAudio (_THIS, SDL_AudioSpec * spec);
+static void NAS_WaitAudio (_THIS);
+static void NAS_PlayAudio (_THIS);
+static Uint8 *NAS_GetAudioBuf (_THIS);
+static void NAS_CloseAudio (_THIS);
 
 /* Audio driver bootstrap functions */
 
-static int Audio_Available(void)
+static int
+Audio_Available (void)
 {
-	AuServer *aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
-	if (!aud) return 0;
+    AuServer *aud = AuOpenServer ("", 0, NULL, 0, NULL, NULL);
+    if (!aud)
+        return 0;
 
-	AuCloseServer(aud);
-	return 1;
+    AuCloseServer (aud);
+    return 1;
 }
 
-static void Audio_DeleteDevice(SDL_AudioDevice *device)
+static void
+Audio_DeleteDevice (SDL_AudioDevice * device)
 {
-	SDL_free(device->hidden);
-	SDL_free(device);
+    SDL_free (device->hidden);
+    SDL_free (device);
 }
 
-static SDL_AudioDevice *Audio_CreateDevice(int devindex)
+static SDL_AudioDevice *
+Audio_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 = NAS_OpenAudio;
-	this->WaitAudio = NAS_WaitAudio;
-	this->PlayAudio = NAS_PlayAudio;
-	this->GetAudioBuf = NAS_GetAudioBuf;
-	this->CloseAudio = NAS_CloseAudio;
+    /* Set the function pointers */
+    this->OpenAudio = NAS_OpenAudio;
+    this->WaitAudio = NAS_WaitAudio;
+    this->PlayAudio = NAS_PlayAudio;
+    this->GetAudioBuf = NAS_GetAudioBuf;
+    this->CloseAudio = NAS_CloseAudio;
 
-	this->free = Audio_DeleteDevice;
+    this->free = Audio_DeleteDevice;
 
-	return this;
+    return this;
 }
 
 AudioBootStrap NAS_bootstrap = {
-	NAS_DRIVER_NAME, "Network Audio System",
-	Audio_Available, Audio_CreateDevice
+    NAS_DRIVER_NAME, "Network Audio System",
+    Audio_Available, Audio_CreateDevice
 };
 
 /* This function waits until it is possible to write a full sound buffer */
-static void NAS_WaitAudio(_THIS)
+static void
+NAS_WaitAudio (_THIS)
 {
-	while ( this->hidden->buf_free < this->hidden->mixlen ) {
-		AuEvent ev;
-		AuNextEvent(this->hidden->aud, AuTrue, &ev);
-		AuDispatchEvent(this->hidden->aud, &ev);
-	}
+    while (this->hidden->buf_free < this->hidden->mixlen) {
+        AuEvent ev;
+        AuNextEvent (this->hidden->aud, AuTrue, &ev);
+        AuDispatchEvent (this->hidden->aud, &ev);
+    }
 }
 
-static void NAS_PlayAudio(_THIS)
+static void
+NAS_PlayAudio (_THIS)
 {
-	while (this->hidden->mixlen > this->hidden->buf_free) { /* We think the buffer is full? Yikes! Ask the server for events,
-				    in the hope that some of them is LowWater events telling us more
-				    of the buffer is free now than what we think. */
-		AuEvent ev;
-		AuNextEvent(this->hidden->aud, AuTrue, &ev);
-		AuDispatchEvent(this->hidden->aud, &ev);
-	}
-	this->hidden->buf_free -= this->hidden->mixlen;
+    while (this->hidden->mixlen > this->hidden->buf_free) {     /* We think the buffer is full? Yikes! Ask the server for events,
+                                                                   in the hope that some of them is LowWater events telling us more
+                                                                   of the buffer is free now than what we think. */
+        AuEvent ev;
+        AuNextEvent (this->hidden->aud, AuTrue, &ev);
+        AuDispatchEvent (this->hidden->aud, &ev);
+    }
+    this->hidden->buf_free -= this->hidden->mixlen;
 
-	/* Write the audio data */
-	AuWriteElement(this->hidden->aud, this->hidden->flow, 0, this->hidden->mixlen, this->hidden->mixbuf, AuFalse, NULL);
+    /* Write the audio data */
+    AuWriteElement (this->hidden->aud, this->hidden->flow, 0,
+                    this->hidden->mixlen, this->hidden->mixbuf, AuFalse,
+                    NULL);
 
-	this->hidden->written += this->hidden->mixlen;
-	
+    this->hidden->written += this->hidden->mixlen;
+
 #ifdef DEBUG_AUDIO
-	fprintf(stderr, "Wrote %d bytes of audio data\n", this->hidden->mixlen);
+    fprintf (stderr, "Wrote %d bytes of audio data\n", this->hidden->mixlen);
 #endif
 }
 
-static Uint8 *NAS_GetAudioBuf(_THIS)
+static Uint8 *
+NAS_GetAudioBuf (_THIS)
 {
-	return(this->hidden->mixbuf);
+    return (this->hidden->mixbuf);
 }
 
-static void NAS_CloseAudio(_THIS)
+static void
+NAS_CloseAudio (_THIS)
 {
-	if ( this->hidden->mixbuf != NULL ) {
-		SDL_FreeAudioMem(this->hidden->mixbuf);
-		this->hidden->mixbuf = NULL;
-	}
-	if ( this->hidden->aud ) {
-		AuCloseServer(this->hidden->aud);
-		this->hidden->aud = 0;
-	}
+    if (this->hidden->mixbuf != NULL) {
+        SDL_FreeAudioMem (this->hidden->mixbuf);
+        this->hidden->mixbuf = NULL;
+    }
+    if (this->hidden->aud) {
+        AuCloseServer (this->hidden->aud);
+        this->hidden->aud = 0;
+    }
 }
 
-static unsigned char sdlformat_to_auformat(unsigned int fmt)
+static unsigned char
+sdlformat_to_auformat (unsigned int fmt)
 {
-  switch (fmt)
-    {
+    switch (fmt) {
     case AUDIO_U8:
-      return AuFormatLinearUnsigned8;
+        return AuFormatLinearUnsigned8;
     case AUDIO_S8:
-      return AuFormatLinearSigned8;
+        return AuFormatLinearSigned8;
     case AUDIO_U16LSB:
-      return AuFormatLinearUnsigned16LSB;
+        return AuFormatLinearUnsigned16LSB;
     case AUDIO_U16MSB:
-      return AuFormatLinearUnsigned16MSB;
+        return AuFormatLinearUnsigned16MSB;
     case AUDIO_S16LSB:
-      return AuFormatLinearSigned16LSB;
+        return AuFormatLinearSigned16LSB;
     case AUDIO_S16MSB:
-      return AuFormatLinearSigned16MSB;
+        return AuFormatLinearSigned16MSB;
     }
-  return AuNone;
+    return AuNone;
 }
 
 static AuBool
-event_handler(AuServer* aud, AuEvent* ev, AuEventHandlerRec* hnd)
+event_handler (AuServer * aud, AuEvent * ev, AuEventHandlerRec * hnd)
 {
-	switch (ev->type) {
-	case AuEventTypeElementNotify: {
-		AuElementNotifyEvent* event = (AuElementNotifyEvent *)ev;
+    switch (ev->type) {
+    case AuEventTypeElementNotify:
+        {
+            AuElementNotifyEvent *event = (AuElementNotifyEvent *) ev;
 
-		switch (event->kind) {
-		case AuElementNotifyKindLowWater:
-			if (this2->buf_free >= 0) {
-				this2->really += event->num_bytes;
-				gettimeofday(&this2->last_tv, 0);
-				this2->buf_free += event->num_bytes;
-			} else {
-				this2->buf_free = event->num_bytes;
-			}
-			break;
-		case AuElementNotifyKindState:
-			switch (event->cur_state) {
-			case AuStatePause:
-				if (event->reason != AuReasonUser) {
-					if (this2->buf_free >= 0) {
-						this2->really += event->num_bytes;
-						gettimeofday(&this2->last_tv, 0);
-						this2->buf_free += event->num_bytes;
-					} else {
-						this2->buf_free = event->num_bytes;
-					}
-				}
-				break;
-			}
-		}
-	}
-	}
-	return AuTrue;
+            switch (event->kind) {
+            case AuElementNotifyKindLowWater:
+                if (this2->buf_free >= 0) {
+                    this2->really += event->num_bytes;
+                    gettimeofday (&this2->last_tv, 0);
+                    this2->buf_free += event->num_bytes;
+                } else {
+                    this2->buf_free = event->num_bytes;
+                }
+                break;
+            case AuElementNotifyKindState:
+                switch (event->cur_state) {
+                case AuStatePause:
+                    if (event->reason != AuReasonUser) {
+                        if (this2->buf_free >= 0) {
+                            this2->really += event->num_bytes;
+                            gettimeofday (&this2->last_tv, 0);
+                            this2->buf_free += event->num_bytes;
+                        } else {
+                            this2->buf_free = event->num_bytes;
+                        }
+                    }
+                    break;
+                }
+            }
+        }
+    }
+    return AuTrue;
 }
 
 static AuDeviceID
-find_device(_THIS, int nch)
+find_device (_THIS, int nch)
 {
-	int i;
-	for (i = 0; i < AuServerNumDevices(this->hidden->aud); i++) {
-		if ((AuDeviceKind(AuServerDevice(this->hidden->aud, i)) ==
-				AuComponentKindPhysicalOutput) &&
-			AuDeviceNumTracks(AuServerDevice(this->hidden->aud, i)) == nch) {
-			return AuDeviceIdentifier(AuServerDevice(this->hidden->aud, i));
-		}
-	}
-	return AuNone;
+    int i;
+    for (i = 0; i < AuServerNumDevices (this->hidden->aud); i++) {
+        if ((AuDeviceKind (AuServerDevice (this->hidden->aud, i)) ==
+             AuComponentKindPhysicalOutput) &&
+            AuDeviceNumTracks (AuServerDevice (this->hidden->aud, i)) ==
+            nch) {
+            return AuDeviceIdentifier (AuServerDevice (this->hidden->aud, i));
+        }
+    }
+    return AuNone;
 }
 
-static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec)
+static int
+NAS_OpenAudio (_THIS, SDL_AudioSpec * spec)
 {
-	AuElement elms[3];
-	int buffer_size;
-	Uint16 test_format, format;
+    AuElement elms[3];
+    int buffer_size;
+    Uint16 test_format, format;
+
+    this->hidden->mixbuf = NULL;
 
-	this->hidden->mixbuf = NULL;
+    /* Try for a closest match on audio format */
+    format = 0;
+    for (test_format = SDL_FirstAudioFormat (spec->format);
+         !format && test_format;) {
+        format = sdlformat_to_auformat (test_format);
 
-	/* Try for a closest match on audio format */
-	format = 0;
-	for ( test_format = SDL_FirstAudioFormat(spec->format);
-						! format && test_format; ) {
-		format = sdlformat_to_auformat(test_format);
+        if (format == AuNone) {
+            test_format = SDL_NextAudioFormat ();
+        }
+    }
+    if (format == 0) {
+        SDL_SetError ("Couldn't find any hardware audio formats");
+        return (-1);
+    }
+    spec->format = test_format;
 
-		if (format == AuNone) {
-			test_format = SDL_NextAudioFormat();
-		}
-	}
-	if ( format == 0 ) {
-		SDL_SetError("Couldn't find any hardware audio formats");
-		return(-1);
-	}
-	spec->format = test_format;
+    this->hidden->aud = AuOpenServer ("", 0, NULL, 0, NULL, NULL);
+    if (this->hidden->aud == 0) {
+        SDL_SetError ("Couldn't open connection to NAS server");
+        return (-1);
+    }
+
+    this->hidden->dev = find_device (this, spec->channels);
+    if ((this->hidden->dev == AuNone)
+        || (!(this->hidden->flow = AuCreateFlow (this->hidden->aud, NULL)))) {
+        AuCloseServer (this->hidden->aud);
+        this->hidden->aud = 0;
+        SDL_SetError
+            ("Couldn't find a fitting playback device on NAS server");
+        return (-1);
+    }
 
-	this->hidden->aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
-	if (this->hidden->aud == 0)
-	{
-		SDL_SetError("Couldn't open connection to NAS server");
-		return (-1);
-	}
-	
-	this->hidden->dev = find_device(this, spec->channels);
-	if ((this->hidden->dev == AuNone) || (!(this->hidden->flow = AuCreateFlow(this->hidden->aud, NULL)))) {
-		AuCloseServer(this->hidden->aud);
-		this->hidden->aud = 0;
-		SDL_SetError("Couldn't find a fitting playback device on NAS server");
-		return (-1);
-	}
-	
-	buffer_size = spec->freq;
-	if (buffer_size < 4096)
-		buffer_size = 4096; 
+    buffer_size = spec->freq;
+    if (buffer_size < 4096)
+        buffer_size = 4096;
 
-	if (buffer_size > 32768)
-		buffer_size = 32768; /* So that the buffer won't get unmanageably big. */
+    if (buffer_size > 32768)
+        buffer_size = 32768;    /* So that the buffer won't get unmanageably big. */
 
-	/* Calculate the final parameters for this audio specification */
-	SDL_CalculateAudioSpec(spec);
+    /* Calculate the final parameters for this audio specification */
+    SDL_CalculateAudioSpec (spec);
+
+    this2 = this->hidden;
 
-	this2 = this->hidden;
+    AuMakeElementImportClient (elms, spec->freq, format, spec->channels,
+                               AuTrue, buffer_size, buffer_size / 4, 0, NULL);
+    AuMakeElementExportDevice (elms + 1, 0, this->hidden->dev, spec->freq,
+                               AuUnlimitedSamples, 0, NULL);
+    AuSetElements (this->hidden->aud, this->hidden->flow, AuTrue, 2, elms,
+                   NULL);
+    AuRegisterEventHandler (this->hidden->aud, AuEventHandlerIDMask, 0,
+                            this->hidden->flow, event_handler,
+                            (AuPointer) NULL);
 
-	AuMakeElementImportClient(elms, spec->freq, format, spec->channels, AuTrue,
-				buffer_size, buffer_size / 4, 0, NULL);
-	AuMakeElementExportDevice(elms+1, 0, this->hidden->dev, spec->freq,
-				AuUnlimitedSamples, 0, NULL);
-	AuSetElements(this->hidden->aud, this->hidden->flow, AuTrue, 2, elms, NULL);
-	AuRegisterEventHandler(this->hidden->aud, AuEventHandlerIDMask, 0, this->hidden->flow,
-				event_handler, (AuPointer) NULL);
-
-	AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);
+    AuStartFlow (this->hidden->aud, this->hidden->flow, NULL);
 
-	/* 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);
+    /* 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);
 
-	/* Get the parent process id (we're the parent of the audio thread) */
-	this->hidden->parent = getpid();
+    /* Get the parent process id (we're the parent of the audio thread) */
+    this->hidden->parent = getpid ();
 
-	/* 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: */