From 152d605773745cf59f89a3575ed0aed3c8bd5b2e Mon Sep 17 00:00:00 2001
From: Miguel Freitas <miguelfreitas@users.sourceforge.net>
Date: Mon, 1 Jul 2002 13:51:26 +0000
Subject: =?UTF-8?q?improved=20audio=20resampling=20for=20limited=20feature?=
 =?UTF-8?q?d=20sound=20cards=20(like=20the=20ones=20found=20in=20laptops,?=
 =?UTF-8?q?=20supporting=20only=2016=20bits,=20only=20stereo=20etc).=20as?=
 =?UTF-8?q?=20added=20bonus=20of=20new=20"stackable"=20conversion=20scheme?=
 =?UTF-8?q?=20fixes=20resampling=20for=208=20bit=20streams.=20(thanks=20Da?=
 =?UTF-8?q?mien=20Clermont=C3=A9=20for=20discussion=20and=20ideas)=20note1?=
 =?UTF-8?q?:=20alsa=20patch=20untested.=20note2:=20pass-through=20untested?=
 =?UTF-8?q?.?=
MIME-Version: 1.0
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CVS patchset: 2187
CVS date: 2002/07/01 13:51:26
---
 src/xine-engine/resample.c | 50 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

(limited to 'src/xine-engine/resample.c')

diff --git a/src/xine-engine/resample.c b/src/xine-engine/resample.c
index 4b363735c..6f7863e6e 100644
--- a/src/xine-engine/resample.c
+++ b/src/xine-engine/resample.c
@@ -17,7 +17,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
  *
- * $Id: resample.c,v 1.2 2001/12/27 14:30:30 f1rmb Exp $
+ * $Id: resample.c,v 1.3 2002/07/01 13:51:28 miguelfreitas Exp $
  */
 
 #ifdef HAVE_CONFIG_H
@@ -278,3 +278,51 @@ void audio_out_resample_6channel(int16_t* input_samples, uint32_t in_samples,
   output_samples[out_samples*6-2] = input_samples[in_samples*6-2];
   output_samples[out_samples*6-1] = input_samples[in_samples*6-1];
 }
+
+void audio_out_resample_8to16(int8_t* input_samples, 
+                              int16_t* output_samples, uint32_t samples)
+{
+  while( samples-- ) {
+    int16_t os;
+    
+    os = *input_samples++;
+    os = (os - 0x80) << 8;
+    *output_samples++ = os;
+  }
+}
+
+void audio_out_resample_16to8(int16_t* input_samples, 
+                              int8_t* output_samples, uint32_t samples)
+{
+  while( samples-- ) {
+    int16_t os;
+    
+    os = *input_samples++;
+    os = (os >> 8) + 0x80;
+    *output_samples++ = os;
+  }
+}
+
+void audio_out_resample_monotostereo(int16_t* input_samples, 
+                                     int16_t* output_samples, uint32_t frames)
+{
+  while( frames-- ) {
+    int16_t os;
+    
+    os = *input_samples++;
+    *output_samples++ = os;
+    *output_samples++ = os;
+  }
+}
+
+void audio_out_resample_stereotomono(int16_t* input_samples, 
+                                     int16_t* output_samples, uint32_t frames)
+{
+  while( frames-- ) {
+    int16_t os;
+    
+    os = (*input_samples++)>>1;
+    os += (*input_samples++)>>1;
+    *output_samples++ = os;
+  }
+}
-- 
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