1 files changed, 81 insertions, 0 deletions
diff --git a/src/pulsecore/sample-util.h b/src/pulsecore/sample-util.h
new file mode 100644
index 00000000..cef70750
--- /dev/null
+++ b/src/pulsecore/sample-util.h
@@ -0,0 +1,81 @@
+#ifndef foosampleutilhfoo
+#define foosampleutilhfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio 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 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <pulse/sample.h>
+#include <pulse/volume.h>
+#include <pulsecore/memblock.h>
+#include <pulsecore/memchunk.h>
+
+typedef struct pa_silence_cache {
+    pa_memblock* blocks[PA_SAMPLE_MAX];
+} pa_silence_cache;
+
+void pa_silence_cache_init(pa_silence_cache *cache);
+void pa_silence_cache_done(pa_silence_cache *cache);
+
+void *pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec);
+pa_memchunk* pa_silence_memchunk(pa_memchunk *c, const pa_sample_spec *spec);
+pa_memblock* pa_silence_memblock(pa_memblock *b, const pa_sample_spec *spec);
+
+pa_memchunk* pa_silence_memchunk_get(pa_silence_cache *cache, pa_mempool *pool, pa_memchunk* ret, const pa_sample_spec *spec, size_t length);
+
+typedef struct pa_mix_info {
+    pa_memchunk chunk;
+    pa_cvolume volume;
+    void *userdata;
+
+    /* The following fields are used internally by pa_mix(), should
+     * not be initialised by the caller of pa_mix(). */
+    void *ptr;
+    union {
+        int32_t i;
+        float f;
+    } linear[PA_CHANNELS_MAX];
+} pa_mix_info;
+
+size_t pa_mix(
+    pa_mix_info channels[],
+    unsigned nchannels,
+    void *data,
+    size_t length,
+    const pa_sample_spec *spec,
+    const pa_cvolume *volume,
+    pa_bool_t mute);
+
+void pa_volume_memchunk(
+    pa_memchunk*c,
+    const pa_sample_spec *spec,
+    const pa_cvolume *volume);
+
+size_t pa_frame_align(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
+
+int pa_frame_aligned(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
+
+void pa_interleave(const void *src[], unsigned channels, void *dst, size_t ss, unsigned n);
+void pa_deinterleave(const void *src, void *dst[], unsigned channels, size_t ss, unsigned n);
+
+void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n);
+
+#endif