Add libswresample.

Similar to libswscale this does resampling and format convertion, just for audio
instead of video.
changing sampling rate, sample formats, channel layouts and sample packing all
in one with a very simple public interface.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 38 insertions, 0 deletions

diff --git a/libswresample/rematrix_template.c b/libswresample/rematrix_template.c
new file mode 100644
index 0000000000..5d5aef2ca8
--- /dev/null
+++ b/libswresample/rematrix_template.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at)
+ *
+ * This file is part of libswresample
+ *
+ * libswresample is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * libswresample is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with libswresample; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+static void RENAME(sum2)(SAMPLE *out, const SAMPLE *in1, const SAMPLE *in2, float coeff1, float coeff2, int len){
+    int i;
+
+    for(i=0; i<len; i++)
+        out[i] = coeff1*in1[i] + coeff2*in2[i]; //FIXME better int16
+}
+
+static void RENAME(copy)(SAMPLE *out, const SAMPLE *in, float coeff, int len){
+    if(coeff == 1.0){
+        memcpy(out, in, sizeof(SAMPLE)*len);
+    }else{
+        int i;
+        for(i=0; i<len; i++)
+            out[i] = coeff*in[i]; //FIXME better int16
+    }
+}
+