commit liboil porting changes

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/liboil-test@344 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 98 insertions, 0 deletions

diff --git a/polyp/volume.h b/polyp/volume.h
new file mode 100644
index 00000000..c013ddde
--- /dev/null
+++ b/polyp/volume.h
@@ -0,0 +1,98 @@
+#ifndef foovolumehfoo
+#define foovolumehfoo
+
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser 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 Lesser 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 <inttypes.h>
+#include <polyp/cdecl.h>
+#include <polyp/sample.h>
+
+/** \file
+ * Constants and routines for volume handling */
+
+PA_C_DECL_BEGIN
+
+/** Volume specification:
+ *  PA_VOLUME_MUTED: silence;
+ * < PA_VOLUME_NORM: decreased volume;
+ *   PA_VOLUME_NORM: normal volume;
+ * > PA_VOLUME_NORM: increased volume */
+typedef uint32_t pa_volume_t;
+
+/** Normal volume (100%) */
+#define PA_VOLUME_NORM (0x10000)
+
+/** Muted volume (0%) */
+#define PA_VOLUME_MUTED (0)
+
+/** A structure encapsulating a per-channel volume */
+struct pa_cvolume {
+    uint8_t channels;
+    pa_volume_t values[PA_CHANNELS_MAX];
+};
+
+/** Return non-zero when *a == *b */
+int pa_cvolume_equal(const struct pa_cvolume *a, const struct pa_cvolume *b);
+
+/** Set the volume of all channels to PA_VOLUME_NORM */
+void pa_cvolume_reset(struct pa_cvolume *a);
+
+/** Set the volume of all channels to PA_VOLUME_MUTED */
+void pa_cvolume_mute(struct pa_cvolume *a);
+
+/** Set the volume of all channels to the specified parameter */
+void pa_cvolume_set(struct pa_cvolume *a, pa_volume_t v);
+
+/** Pretty print a volume structure */
+char *pa_cvolume_snprintf(char *s, size_t l, const struct pa_cvolume *c, unsigned channels);
+
+/** Return the average volume of all channels */
+pa_volume_t pa_cvolume_avg(const struct pa_cvolume *a);
+
+/** Return non-zero if the volume of all channels is equal to the specified value */
+int pa_cvolume_channels_equal_to(const struct pa_cvolume *a, uint8_t channels, pa_volume_t v);
+
+/** Multiply two volumes specifications, return the result. This uses PA_VOLUME_NORM as neutral element of multiplication. */
+pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b);
+
+/** Convert a decibel value to a volume. \since 0.4 */
+pa_volume_t pa_sw_volume_from_dB(double f);
+
+/** Convert a volume to a decibel value.  \since 0.4 */
+double pa_sw_volume_to_dB(pa_volume_t v);
+
+/** Convert a linear factor to a volume. \since 0.8 */
+pa_volume_t pa_sw_volume_from_linear(double v);
+
+/** Convert a volume to a linear factor. \since 0.8 */
+double pa_sw_volume_to_linear(pa_volume_t v);
+
+#ifdef INFINITY
+#define PA_DECIBEL_MININFTY (-INFINITY)
+#else
+/** This value is used as minus infinity when using pa_volume_{to,from}_dB(). \since 0.4 */
+#define PA_DECIBEL_MININFTY (-200)
+#endif
+
+PA_C_DECL_END
+
+#endif