* modules/gui/wxwindows/preferences_widgets.cpp: attempt at optimizing KeyConfigContr...

[vlc] / modules / audio_filter / resampler / ugly.c

diff --git a/modules/audio_filter/resampler/ugly.c b/modules/audio_filter/resampler/ugly.c
index 880bb511ae68c41b19725c15fabddd8b1d81ad91..b703180b8a0fc3dc0e43a75045c48c9d46f0bcd3 100644 (file)
--- a/modules/audio_filter/resampler/ugly.c
+++ b/modules/audio_filter/resampler/ugly.c
@@ -2,7 +2,7 @@
  * ugly.c : ugly resampler (changes pitch)
  *****************************************************************************
  * Copyright (C) 2002 VideoLAN
- * $Id: ugly.c,v 1.7 2002/11/20 16:43:32 sam Exp $
+ * $Id: ugly.c,v 1.9 2003/03/04 03:27:40 gbazin Exp $
  *
  * Authors: Samuel Hocevar <sam@zoy.org>
  *
@@ -68,7 +68,10 @@ static int Create( vlc_object_t *p_this )
     }
 
     p_filter->pf_do_work = DoWork;
-    p_filter->b_in_place = VLC_FALSE;
+
+    /* We don't want a new buffer to be created because we're not sure we'll
+     * actually need to resample anything. */
+    p_filter->b_in_place = VLC_TRUE;
 
     return VLC_SUCCESS;
 }
@@ -79,15 +82,32 @@ static int Create( vlc_object_t *p_this )
 static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
                     aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
 {
-    int32_t* p_in = (int32_t*)p_in_buf->p_buffer;
-    int32_t* p_out = (int32_t*)p_out_buf->p_buffer;
-
-    int i_nb_channels = aout_FormatNbChannels( &p_filter->input );
-    int i_in_nb = p_in_buf->i_nb_samples;
-    int i_out_nb = i_in_nb * p_filter->output.i_rate
-                    / p_filter->input.i_rate;
-    int i_sample_bytes = i_nb_channels * sizeof(int32_t);
-    int i_out, i_chan, i_remainder = 0;
+    int32_t *p_in, *p_out = (int32_t*)p_out_buf->p_buffer;
+
+    unsigned int i_nb_channels = aout_FormatNbChannels( &p_filter->input );
+    unsigned int i_in_nb = p_in_buf->i_nb_samples;
+    unsigned int i_out_nb = i_in_nb * p_filter->output.i_rate
+                                    / p_filter->input.i_rate;
+    unsigned int i_sample_bytes = i_nb_channels * sizeof(int32_t);
+    unsigned int i_out, i_chan, i_remainder = 0;
+
+    /* Check if we really need to run the resampler */
+    if( p_aout->mixer.mixer.i_rate == p_filter->input.i_rate )
+    {
+        return;
+    }
+
+#ifdef HAVE_ALLOCA
+    p_in = (int32_t *)alloca( p_in_buf->i_nb_bytes );
+#else
+    p_in = (int32_t *)malloc( p_in_buf->i_nb_bytes );
+#endif
+    if( p_in == NULL )
+    {
+        return;
+    }
+
+    p_aout->p_vlc->pf_memcpy( p_in, p_in_buf->p_buffer, p_in_buf->i_nb_bytes );
 
     for( i_out = i_out_nb ; i_out-- ; )
     {