src/audio/arts/SDL_artsaudio.c
changeset 1895 c121d94672cb
parent 1402 d910939febfa
child 1982 3b4ce57c6215
--- a/src/audio/arts/SDL_artsaudio.c	Thu Jul 06 18:01:37 2006 +0000
+++ b/src/audio/arts/SDL_artsaudio.c	Mon Jul 10 21:04:37 2006 +0000
@@ -41,7 +41,7 @@
 #define ARTS_DRIVER_NAME         "arts"
 
 /* Audio driver functions */
-static int ARTS_OpenAudio(_THIS, SDL_AudioSpec *spec);
+static int ARTS_OpenAudio(_THIS, SDL_AudioSpec * spec);
 static void ARTS_WaitAudio(_THIS);
 static void ARTS_PlayAudio(_THIS);
 static Uint8 *ARTS_GetAudioBuf(_THIS);
@@ -53,281 +53,305 @@
 static void *arts_handle = NULL;
 static int arts_loaded = 0;
 
-static int (*SDL_NAME(arts_init))(void);
-static void (*SDL_NAME(arts_free))(void);
-static arts_stream_t (*SDL_NAME(arts_play_stream))(int rate, int bits, int channels, const char *name);
-static int (*SDL_NAME(arts_stream_set))(arts_stream_t s, arts_parameter_t param, int value);
-static int (*SDL_NAME(arts_stream_get))(arts_stream_t s, arts_parameter_t param);
-static int (*SDL_NAME(arts_write))(arts_stream_t s, const void *buffer, int count);
-static void (*SDL_NAME(arts_close_stream))(arts_stream_t s);
+static int (*SDL_NAME(arts_init)) (void);
+static void (*SDL_NAME(arts_free)) (void);
+static arts_stream_t(*SDL_NAME(arts_play_stream)) (int rate, int bits,
+                                                   int channels,
+                                                   const char *name);
+static int (*SDL_NAME(arts_stream_set)) (arts_stream_t s,
+                                         arts_parameter_t param, int value);
+static int (*SDL_NAME(arts_stream_get)) (arts_stream_t s,
+                                         arts_parameter_t param);
+static int (*SDL_NAME(arts_write)) (arts_stream_t s, const void *buffer,
+                                    int count);
+static void (*SDL_NAME(arts_close_stream)) (arts_stream_t s);
 
-static struct {
-	const char *name;
-	void **func;
+static struct
+{
+    const char *name;
+    void **func;
 } arts_functions[] = {
-	{ "arts_init",		(void **)&SDL_NAME(arts_init)		},
-	{ "arts_free",		(void **)&SDL_NAME(arts_free)		},
-	{ "arts_play_stream",	(void **)&SDL_NAME(arts_play_stream)	},
-	{ "arts_stream_set",	(void **)&SDL_NAME(arts_stream_set)	},
-	{ "arts_stream_get",	(void **)&SDL_NAME(arts_stream_get)	},
-	{ "arts_write",		(void **)&SDL_NAME(arts_write)		},
-	{ "arts_close_stream",	(void **)&SDL_NAME(arts_close_stream)	},
-};
+    {
+    "arts_init", (void **) &SDL_NAME(arts_init)}, {
+    "arts_free", (void **) &SDL_NAME(arts_free)}, {
+    "arts_play_stream", (void **) &SDL_NAME(arts_play_stream)}, {
+    "arts_stream_set", (void **) &SDL_NAME(arts_stream_set)}, {
+    "arts_stream_get", (void **) &SDL_NAME(arts_stream_get)}, {
+    "arts_write", (void **) &SDL_NAME(arts_write)}, {
+"arts_close_stream", (void **) &SDL_NAME(arts_close_stream)},};
 
-static void UnloadARTSLibrary()
+static void
+UnloadARTSLibrary()
 {
-	if ( arts_loaded ) {
-		SDL_UnloadObject(arts_handle);
-		arts_handle = NULL;
-		arts_loaded = 0;
-	}
+    if (arts_loaded) {
+        SDL_UnloadObject(arts_handle);
+        arts_handle = NULL;
+        arts_loaded = 0;
+    }
 }
 
-static int LoadARTSLibrary(void)
+static int
+LoadARTSLibrary(void)
 {
-	int i, retval = -1;
+    int i, retval = -1;
 
-	arts_handle = SDL_LoadObject(arts_library);
-	if ( arts_handle ) {
-		arts_loaded = 1;
-		retval = 0;
-		for ( i=0; i<SDL_arraysize(arts_functions); ++i ) {
-			*arts_functions[i].func = SDL_LoadFunction(arts_handle, arts_functions[i].name);
-			if ( !*arts_functions[i].func ) {
-				retval = -1;
-				UnloadARTSLibrary();
-				break;
-			}
-		}
-	}
-	return retval;
+    arts_handle = SDL_LoadObject(arts_library);
+    if (arts_handle) {
+        arts_loaded = 1;
+        retval = 0;
+        for (i = 0; i < SDL_arraysize(arts_functions); ++i) {
+            *arts_functions[i].func =
+                SDL_LoadFunction(arts_handle, arts_functions[i].name);
+            if (!*arts_functions[i].func) {
+                retval = -1;
+                UnloadARTSLibrary();
+                break;
+            }
+        }
+    }
+    return retval;
 }
 
 #else
 
-static void UnloadARTSLibrary()
+static void
+UnloadARTSLibrary()
 {
-	return;
+    return;
 }
 
-static int LoadARTSLibrary(void)
+static int
+LoadARTSLibrary(void)
 {
-	return 0;
+    return 0;
 }
 
 #endif /* SDL_AUDIO_DRIVER_ARTS_DYNAMIC */
 
 /* Audio driver bootstrap functions */
 
-static int Audio_Available(void)
+static int
+Audio_Available(void)
 {
-	int available = 0;
+    int available = 0;
 
-	if ( LoadARTSLibrary() < 0 ) {
-		return available;
-	}
-	if ( SDL_NAME(arts_init)() == 0 ) {
-#define ARTS_CRASH_HACK	/* Play a stream so aRts doesn't crash */
+    if (LoadARTSLibrary() < 0) {
+        return available;
+    }
+    if (SDL_NAME(arts_init) () == 0) {
+#define ARTS_CRASH_HACK         /* Play a stream so aRts doesn't crash */
 #ifdef ARTS_CRASH_HACK
-		arts_stream_t stream2;
-		stream2=SDL_NAME(arts_play_stream)(44100, 16, 2, "SDL");
-		SDL_NAME(arts_write)(stream2, "", 0);
-		SDL_NAME(arts_close_stream)(stream2);
+        arts_stream_t stream2;
+        stream2 = SDL_NAME(arts_play_stream) (44100, 16, 2, "SDL");
+        SDL_NAME(arts_write) (stream2, "", 0);
+        SDL_NAME(arts_close_stream) (stream2);
 #endif
-		available = 1;
-		SDL_NAME(arts_free)();
-	}
-	UnloadARTSLibrary();
+        available = 1;
+        SDL_NAME(arts_free) ();
+    }
+    UnloadARTSLibrary();
 
-	return available;
+    return available;
 }
 
-static void Audio_DeleteDevice(SDL_AudioDevice *device)
+static void
+Audio_DeleteDevice(SDL_AudioDevice * device)
 {
-	SDL_free(device->hidden);
-	SDL_free(device);
-	UnloadARTSLibrary();
+    SDL_free(device->hidden);
+    SDL_free(device);
+    UnloadARTSLibrary();
 }
 
-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 */
-	LoadARTSLibrary();
-	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));
-	stream = 0;
+    /* Initialize all variables that we clean on shutdown */
+    LoadARTSLibrary();
+    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));
+    stream = 0;
 
-	/* Set the function pointers */
-	this->OpenAudio = ARTS_OpenAudio;
-	this->WaitAudio = ARTS_WaitAudio;
-	this->PlayAudio = ARTS_PlayAudio;
-	this->GetAudioBuf = ARTS_GetAudioBuf;
-	this->CloseAudio = ARTS_CloseAudio;
+    /* Set the function pointers */
+    this->OpenAudio = ARTS_OpenAudio;
+    this->WaitAudio = ARTS_WaitAudio;
+    this->PlayAudio = ARTS_PlayAudio;
+    this->GetAudioBuf = ARTS_GetAudioBuf;
+    this->CloseAudio = ARTS_CloseAudio;
 
-	this->free = Audio_DeleteDevice;
+    this->free = Audio_DeleteDevice;
 
-	return this;
+    return this;
 }
 
 AudioBootStrap ARTS_bootstrap = {
-	ARTS_DRIVER_NAME, "Analog Realtime Synthesizer",
-	Audio_Available, Audio_CreateDevice
+    ARTS_DRIVER_NAME, "Analog Realtime Synthesizer",
+    Audio_Available, Audio_CreateDevice
 };
 
 /* This function waits until it is possible to write a full sound buffer */
-static void ARTS_WaitAudio(_THIS)
+static void
+ARTS_WaitAudio(_THIS)
 {
-	Sint32 ticks;
+    Sint32 ticks;
 
-	/* Check to see if the thread-parent process is still alive */
-	{ static int cnt = 0;
-		/* Note that this only works with thread implementations 
-		   that use a different process id for each thread.
-		*/
-		if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */
-			if ( kill(parent, 0) < 0 ) {
-				this->enabled = 0;
-			}
-		}
-	}
+    /* Check to see if the thread-parent process is still alive */
+    {
+        static int cnt = 0;
+        /* Note that this only works with thread implementations 
+           that use a different process id for each thread.
+         */
+        if (parent && (((++cnt) % 10) == 0)) {  /* Check every 10 loops */
+            if (kill(parent, 0) < 0) {
+                this->enabled = 0;
+            }
+        }
+    }
 
-	/* Use timer for general audio synchronization */
-	ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS;
-	if ( ticks > 0 ) {
-		SDL_Delay(ticks);
-	}
+    /* Use timer for general audio synchronization */
+    ticks = ((Sint32) (next_frame - SDL_GetTicks())) - FUDGE_TICKS;
+    if (ticks > 0) {
+        SDL_Delay(ticks);
+    }
 }
 
-static void ARTS_PlayAudio(_THIS)
+static void
+ARTS_PlayAudio(_THIS)
 {
-	int written;
+    int written;
+
+    /* Write the audio data */
+    written = SDL_NAME(arts_write) (stream, mixbuf, mixlen);
 
-	/* Write the audio data */
-	written = SDL_NAME(arts_write)(stream, mixbuf, mixlen);
-	
-	/* If timer synchronization is enabled, set the next write frame */
-	if ( frame_ticks ) {
-		next_frame += frame_ticks;
-	}
+    /* If timer synchronization is enabled, set the next write frame */
+    if (frame_ticks) {
+        next_frame += frame_ticks;
+    }
 
-	/* If we couldn't write, assume fatal error for now */
-	if ( written < 0 ) {
-		this->enabled = 0;
-	}
+    /* If we couldn't write, assume fatal error for now */
+    if (written < 0) {
+        this->enabled = 0;
+    }
 #ifdef DEBUG_AUDIO
-	fprintf(stderr, "Wrote %d bytes of audio data\n", written);
+    fprintf(stderr, "Wrote %d bytes of audio data\n", written);
 #endif
 }
 
-static Uint8 *ARTS_GetAudioBuf(_THIS)
+static Uint8 *
+ARTS_GetAudioBuf(_THIS)
 {
-	return(mixbuf);
+    return (mixbuf);
 }
 
-static void ARTS_CloseAudio(_THIS)
+static void
+ARTS_CloseAudio(_THIS)
 {
-	if ( mixbuf != NULL ) {
-		SDL_FreeAudioMem(mixbuf);
-		mixbuf = NULL;
-	}
-	if ( stream ) {
-		SDL_NAME(arts_close_stream)(stream);
-		stream = 0;
-	}
-	SDL_NAME(arts_free)();
+    if (mixbuf != NULL) {
+        SDL_FreeAudioMem(mixbuf);
+        mixbuf = NULL;
+    }
+    if (stream) {
+        SDL_NAME(arts_close_stream) (stream);
+        stream = 0;
+    }
+    SDL_NAME(arts_free) ();
 }
 
-static int ARTS_OpenAudio(_THIS, SDL_AudioSpec *spec)
+static int
+ARTS_OpenAudio(_THIS, SDL_AudioSpec * spec)
 {
-	int bits, frag_spec;
-	Uint16 test_format, format;
+    int bits, frag_spec;
+    Uint16 test_format, format;
 
-	/* Reset the timer synchronization flag */
-	frame_ticks = 0.0;
+    /* Reset the timer synchronization flag */
+    frame_ticks = 0.0;
 
-	mixbuf = NULL;
+    mixbuf = NULL;
 
-	/* Try for a closest match on audio format */
-	format = 0;
-	bits = 0;
-	for ( test_format = SDL_FirstAudioFormat(spec->format);
-						! format && test_format; ) {
+    /* Try for a closest match on audio format */
+    format = 0;
+    bits = 0;
+    for (test_format = SDL_FirstAudioFormat(spec->format);
+         !format && test_format;) {
 #ifdef DEBUG_AUDIO
-		fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
+        fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
 #endif
-		switch ( test_format ) {
-			case AUDIO_U8:
-				bits = 8;
-				format = 1;
-				break;
-			case AUDIO_S16LSB:
-				bits = 16;
-				format = 1;
-				break;
-			default:
-				format = 0;
-				break;
-		}
-		if ( ! format ) {
-			test_format = SDL_NextAudioFormat();
-		}
-	}
-	if ( format == 0 ) {
-		SDL_SetError("Couldn't find any hardware audio formats");
-		return(-1);
-	}
-	spec->format = test_format;
+        switch (test_format) {
+        case AUDIO_U8:
+            bits = 8;
+            format = 1;
+            break;
+        case AUDIO_S16LSB:
+            bits = 16;
+            format = 1;
+            break;
+        default:
+            format = 0;
+            break;
+        }
+        if (!format) {
+            test_format = SDL_NextAudioFormat();
+        }
+    }
+    if (format == 0) {
+        SDL_SetError("Couldn't find any hardware audio formats");
+        return (-1);
+    }
+    spec->format = test_format;
 
-	if ( SDL_NAME(arts_init)() != 0 ) {
-		SDL_SetError("Unable to initialize ARTS");
-		return(-1);
-	}
-	stream = SDL_NAME(arts_play_stream)(spec->freq, bits, spec->channels, "SDL");
+    if (SDL_NAME(arts_init) () != 0) {
+        SDL_SetError("Unable to initialize ARTS");
+        return (-1);
+    }
+    stream =
+        SDL_NAME(arts_play_stream) (spec->freq, bits, spec->channels, "SDL");
 
-	/* Calculate the final parameters for this audio specification */
-	SDL_CalculateAudioSpec(spec);
+    /* Calculate the final parameters for this audio specification */
+    SDL_CalculateAudioSpec(spec);
 
-	/* Determine the power of two of the fragment size */
-	for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec );
-	if ( (0x01<<frag_spec) != spec->size ) {
-		SDL_SetError("Fragment size must be a power of two");
-		return(-1);
-	}
-	frag_spec |= 0x00020000;	/* two fragments, for low latency */
+    /* Determine the power of two of the fragment size */
+    for (frag_spec = 0; (0x01 << frag_spec) < spec->size; ++frag_spec);
+    if ((0x01 << frag_spec) != spec->size) {
+        SDL_SetError("Fragment size must be a power of two");
+        return (-1);
+    }
+    frag_spec |= 0x00020000;    /* two fragments, for low latency */
 
 #ifdef ARTS_P_PACKET_SETTINGS
-	SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SETTINGS, frag_spec);
+    SDL_NAME(arts_stream_set) (stream, ARTS_P_PACKET_SETTINGS, frag_spec);
 #else
-	SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SIZE, frag_spec&0xffff);
-	SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_COUNT, frag_spec>>16);
+    SDL_NAME(arts_stream_set) (stream, ARTS_P_PACKET_SIZE,
+                               frag_spec & 0xffff);
+    SDL_NAME(arts_stream_set) (stream, ARTS_P_PACKET_COUNT, frag_spec >> 16);
 #endif
-	spec->size = SDL_NAME(arts_stream_get)(stream, ARTS_P_PACKET_SIZE);
+    spec->size = SDL_NAME(arts_stream_get) (stream, ARTS_P_PACKET_SIZE);
 
-	/* Allocate mixing buffer */
-	mixlen = spec->size;
-	mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen);
-	if ( mixbuf == NULL ) {
-		return(-1);
-	}
-	SDL_memset(mixbuf, spec->silence, spec->size);
+    /* Allocate mixing buffer */
+    mixlen = spec->size;
+    mixbuf = (Uint8 *) SDL_AllocAudioMem(mixlen);
+    if (mixbuf == NULL) {
+        return (-1);
+    }
+    SDL_memset(mixbuf, spec->silence, spec->size);
 
-	/* Get the parent process id (we're the parent of the audio thread) */
-	parent = getpid();
+    /* Get the parent process id (we're the parent of the audio thread) */
+    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: */