On 2014-11-05 00:26, Peter Meerwald wrote:
implement inlineable functions PA_CVOLUME_VALID(),
PA_CVOLUME_CHANNELS_EQUALS_TO(), PA_CVOLUME_IS_MUTED(),
PA_CVOLUME_IS_NORM() that assume data is valid
Why are these uppercase? AFAIK, we don't usually uppercase inline functions.
Signed-off-by: Peter Meerwald <pme...@pmeerw.net>
---
src/pulsecore/volume-util.h | 92 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
create mode 100644 src/pulsecore/volume-util.h
diff --git a/src/pulsecore/volume-util.h b/src/pulsecore/volume-util.h
new file mode 100644
index 0000000..d96c472
--- /dev/null
+++ b/src/pulsecore/volume-util.h
@@ -0,0 +1,92 @@
+#ifndef foovolumeutilhfoo
+#define foovolumeutilhfoo
+
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2014 Peter Meerwald <pme...@pmeerw.net>
+
+ 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 2.1 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/gccmacro.h>
+#include <pulse/sample.h>
+#include <pulse/volume.h>
+
+static inline int PA_CVOLUME_VALID(const pa_cvolume *a) {
+ unsigned c;
+
+ pa_assert_fp(a);
+ pa_assert_fp(pa_channels_valid(a->channels));
+
+ for (c = 0; c < a->channels; c++)
+ if (!PA_VOLUME_IS_VALID(a->values[c]))
+ return 0;
+
+ return 1;
+}
+
+static inline int PA_CVOLUME_CHANNELS_EQUALS_TO(const pa_cvolume *a,
pa_volume_t v) {
+ unsigned c;
+ pa_assert_fp(a);
+
+ pa_assert_fp(PA_CVOLUME_VALID(a));
+ pa_assert_fp(PA_VOLUME_IS_VALID(v));
+
+ for (c = 0; c < a->channels; c++)
+ if (a->values[c] != v)
+ return 0;
+
+ return 1;
+}
+
+static inline int PA_CVOLUME_IS_MUTED(const pa_cvolume *a) {
+ return PA_CVOLUME_CHANNELS_EQUALS_TO(a, PA_VOLUME_MUTED);
+}
+
+/** Return 1 if the specified volume has all channels on normal level */
+static inline int PA_CVOLUME_IS_NORM(const pa_cvolume *a) {
+ return PA_CVOLUME_CHANNELS_EQUALS_TO(a, PA_VOLUME_NORM);
+}
+
+static inline pa_volume_t PA_SW_VOLUME_MULTIPLY(pa_volume_t a, pa_volume_t b) {
+ pa_assert_fp(PA_VOLUME_IS_VALID(a));
+ pa_assert_fp(PA_VOLUME_IS_VALID(b));
+
+ /* cbrt((a/PA_VOLUME_NORM)^3*(b/PA_VOLUME_NORM)^3)*PA_VOLUME_NORM =
a*b/PA_VOLUME_NORM */
+
+ return (pa_volume_t) PA_CLAMP_VOLUME((((uint64_t) a * (uint64_t) b +
(uint64_t) PA_VOLUME_NORM / 2ULL) / (uint64_t) PA_VOLUME_NORM));
+}
+
+static inline pa_cvolume *PA_SW_CVOLUME_MULTIPLY(pa_cvolume *dest, const
pa_cvolume *a, const pa_cvolume *b) {
+ unsigned i;
+
+ pa_assert(dest);
+ pa_assert(a);
+ pa_assert(b);
+
+ pa_assert_fp(pa_cvolume_valid(a));
+ pa_assert_fp(pa_cvolume_valid(b));
+
+ for (i = 0; i < a->channels && i < b->channels; i++)
+ dest->values[i] = PA_SW_VOLUME_MULTIPLY(a->values[i], b->values[i]);
+
+ dest->channels = (uint8_t) i;
+
+ return dest;
+}
+
+#endif
--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
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