1 files changed, 48 insertions, 0 deletions
diff --git a/polyp/sample-util.h b/polyp/sample-util.h
new file mode 100644
index 00000000..73101ab4
--- /dev/null
+++ b/polyp/sample-util.h
@@ -0,0 +1,48 @@
+#ifndef foosampleutilhfoo
+#define foosampleutilhfoo
+
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+ 
+  polypaudio 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
+  General Public License for more details.
+ 
+  You should have received a copy of the GNU General Public License
+  along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include "sample.h"
+#include "memblock.h"
+#include "memchunk.h"
+
+#define PA_VOLUME_NORM (0x100)
+#define PA_VOLUME_MUTE (0)
+
+struct pa_memblock *pa_silence_memblock(struct pa_memblock* b, const struct pa_sample_spec *spec);
+void pa_silence_memchunk(struct pa_memchunk *c, const struct pa_sample_spec *spec);
+void pa_silence_memory(void *p, size_t length, const struct pa_sample_spec *spec);
+
+struct pa_mix_info {
+    struct pa_memchunk chunk;
+    uint32_t volume;
+    void *userdata;
+};
+
+size_t pa_mix(struct pa_mix_info channels[], unsigned nchannels, void *data, size_t length, const struct pa_sample_spec *spec, uint32_t volume);
+
+void pa_volume_memchunk(struct pa_memchunk*c, const struct pa_sample_spec *spec, uint32_t volume);
+
+uint32_t pa_volume_multiply(uint32_t a, uint32_t b);
+
+#endif