Adding function for calculating the delay caused by the filters

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7666 b3059339-0415-0410-9bf9-f77b7e298cf2

libaf/af.c

@@ -487,6 +487,19 @@ int af_calc_insize_constrained(af_stream_t* s, int len,
   return in;
 }
 
+/* Calculate the total delay [ms] caused by the filters */
+double af_calc_delay(af_stream_t* s)
+{
+  af_instance_t* af=s->first; 
+  register double delay = 0.0;
+  // Iterate through all filters 
+  while(af){
+    delay += af->delay;
+    af=af->next;
+  }
+  return delay;
+}
+
 /* Helper function called by the macro with the same name this
    function should not be called directly */
 inline int af_resize_local_buffer(af_instance_t* af, af_data_t* data)

libaf/af.h

@@ -48,6 +48,7 @@ typedef struct af_instance_s
   af_data_t* data; // configuration for outgoing data stream
   struct af_instance_s* next;
   struct af_instance_s* prev;  
+  double delay; // Delay caused by the filter [ms]
   frac_t mul; /* length multiplier: how much does this instance change
 		 the length of the buffer. */
 }af_instance_t;
@@ -180,6 +181,8 @@ int af_inputlen(af_stream_t* s, int len);
 int af_calc_insize_constrained(af_stream_t* s, int len,
 			       int max_outsize,int max_insize);
 
+/* Calculate the total delay caused by the filters */
+double af_calc_delay(af_stream_t* s);
 
 // Helper functions and macros used inside the audio filters
 

libaf/af_delay.c

@@ -41,11 +41,13 @@ static int control(struct af_instance_s* af, int cmd, void* arg)
       mp_msg(MSGT_AFILTER,MSGL_ERR,"Error setting delay length in af_delay. Delay must be between 0s and 30s\n");
       s->len=0;
       s->tlen=0.0;
+      af->delay=0.0;
       return AF_ERROR;
     }
 
     // Set new len and allocate new buffer
     s->tlen = *((float*)arg);
+    af->delay = s->tlen * 1000.0;
     s->len  = af->data->rate*af->data->bps*af->data->nch*(int)s->tlen;
     s->buf  = malloc(s->len);
     mp_msg(MSGT_AFILTER,MSGL_DBG2,"[delay] Delaying audio output by %0.2fs\n",s->tlen);

libaf/af_resample.c

@@ -258,7 +258,8 @@ static int control(struct af_instance_s* af, int cmd, void* arg)
       mp_msg(MSGT_AFILTER,MSGL_V,"[resample] New filter designed up: %i down: %i\n", s->up, s->dn);
     }
 
-    // Set multiplier
+    // Set multiplier and delay
+    af->delay = (double)(1000*L/2)/((double)n->rate);
     af->mul.n = s->up;
     af->mul.d = s->dn;
     return rv;