X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=osx_write.c;h=b3049c5aadf375abd365e49dafc8a26ff123bd91;hp=39af500077a939a28109e7535868560487f63b1d;hb=734073dbcac97e8ef6a9c5b3244b953a01358bc9;hpb=f39c27735eab6c98ff84a90f53ed7cf311c9b664

diff --git a/osx_write.c b/osx_write.c
index 39af5000..b3049c5a 100644
--- a/osx_write.c
+++ b/osx_write.c
@@ -44,33 +44,21 @@ struct osx_buffer {
 	long remaining;
 	struct osx_buffer *next;
 };
-typedef struct osx_buffer osx_buffer;
 
 struct private_osx_write_data {
 	long size;
-	short *ptr;
 	AudioUnit output;
 	char play;
-	osx_buffer *from; /* Current buffers */
-	osx_buffer *to;
+	struct osx_buffer *from; /* Current buffers */
+	struct osx_buffer *to;
 	unsigned samplerate;
 	unsigned channels;
 };
 
-
-/*
- * Tried with 3 buffers, but then any little window move is sufficient to
- * stop the sound (OK, on a G3 400 with a Public Beta. Perhaps now we can
- * go down to 2 buffers). With 16 buffers we have 1.5 seconds music
- * buffered (or, if you're pessimistic, 1.5 seconds latency). Note 0
- * buffers don't work much further than the Bus error.
- */
-#define NUMBER_BUFFERS 2
-
 static void destroy_buffers(struct private_osx_write_data *powd)
 {
-	osx_buffer *ptr;
-	osx_buffer *ptr2;
+	struct osx_buffer *ptr;
+	struct osx_buffer *ptr2;
 	ptr = powd->to->next;
 	powd->to->next = NULL;
 	while (ptr) {
@@ -81,14 +69,16 @@ static void destroy_buffers(struct private_osx_write_data *powd)
 	}
 }
 
-static void init_buffers(struct private_osx_write_data *powd)
+static void init_buffers(struct writer_node *wn)
 {
+	struct private_osx_write_data *powd = wn->private_data;
+	struct osx_write_args_info *conf = wn->conf;
+	struct osx_buffer **ptrptr;
 	int i;
 
-	osx_buffer ** ptrptr;
 	ptrptr = &powd->to;
-	for (i = 0; i < NUMBER_BUFFERS; i++) {
-		*ptrptr = malloc(sizeof(osx_buffer));
+	for (i = 0; i < conf->numbuffers_arg; i++) {
+		*ptrptr = malloc(sizeof(struct osx_buffer));
 		(*ptrptr)->size = 0;
 		(*ptrptr)->remaining = 0;
 		(*ptrptr)->buffer = NULL;
@@ -97,13 +87,12 @@ static void init_buffers(struct private_osx_write_data *powd)
 	*ptrptr = powd->from = powd->to;
 }
 
-static void fill_buffer(osx_buffer *b, short *source, long size)
+static void fill_buffer(struct osx_buffer *b, short *source, long size)
 {
 	float *dest;
 
 	if (b->remaining) /* Non empty buffer, must still be playing */
 		return;
-	PARA_INFO_LOG("%ld\n", size);
 	if (b->size != size) {
 		b->buffer = para_realloc(b->buffer, size * sizeof(float));
 		b->size = size;
@@ -146,7 +135,7 @@ static OSStatus osx_callback(void * inClientData,
 					/* wait for the results */
 					usleep(2000);
 			}
-			PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
+//			PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
 			/*
 			 * we dump what we can. In fact, just the necessary
 			 * should be sufficient
@@ -196,7 +185,6 @@ static int osx_write_open(struct writer_node *wn)
 	if (AudioUnitInitialize(powd->output))
 		goto e1;
 	powd->size = 0;
-	powd->ptr = NULL;
 	powd->play = 0;
 	/* Hmmm, let's choose PCM format */
 	/* We tell the Output Unit what format we're going to supply data to it.
@@ -230,7 +218,7 @@ static int osx_write_open(struct writer_node *wn)
 			kAudioUnitScope_Input, 0, &format,
 			sizeof(AudioStreamBasicDescription)))
 		goto e2;
-	init_buffers(powd);
+	init_buffers(wn);
 	ret = -E_ADD_CALLBACK;
 	if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_SetRenderCallback,
 			kAudioUnitScope_Input, 0, &inputCallback,
@@ -308,8 +296,28 @@ static int osx_write_post_select(__a_unused struct sched *s,
 
 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
 {
+	struct private_osx_write_data *powd = wn->private_data;
+	struct writer_node_group *wng = wn->wng;
+	size_t numbytes = powd->to->remaining * sizeof(short);
+	struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
+	unsigned long divisor;
+
+	if (!numbytes && *wng->loaded >= sizeof(short))
+		goto min_delay; /* there's a buffer to fill */
+	if (!numbytes)
+		return 1;
+	divisor = powd->samplerate * powd->channels * 2 / numbytes;
+	if (divisor)
+		tv_divide(divisor, &tmp, &delay);
+	if (tv_diff(&s->timeout, &delay, NULL) > 0)
+		s->timeout = delay;
+//	PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
+//		(long unsigned) s->timeout.tv_usec);
+	return 1;
+min_delay:
+	PARA_DEBUG_LOG("%s\n", "minimal delay");
 	s->timeout.tv_sec = 0;
-	s->timeout.tv_usec = 20;
+	s->timeout.tv_usec = 1;
 	return 1;
 }