From bb8263be6fbbb227989e8cb4f5dc7dc67216724d Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 28 Aug 2008 17:53:01 +0200
Subject: add byte-to-usec and usec-to-byte converters that round up, not down

---
 src/pulsecore/sample-util.c | 33 +++++++++++++++++++++++++++++++++
 src/pulsecore/sample-util.h |  3 +++
 2 files changed, 36 insertions(+)

diff --git a/src/pulsecore/sample-util.c b/src/pulsecore/sample-util.c
index 4b2efe5e..b4234af5 100644
--- a/src/pulsecore/sample-util.c
+++ b/src/pulsecore/sample-util.c
@@ -31,6 +31,8 @@
 #include <liboil/liboilfuncs.h>
 #include <liboil/liboil.h>
 
+#include <pulse/timeval.h>
+
 #include <pulsecore/log.h>
 #include <pulsecore/macro.h>
 #include <pulsecore/g711.h>
@@ -981,3 +983,34 @@ void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const vo
         }
     }
 }
+
+/* Similar to pa_bytes_to_usec() but rounds up, not down */
+
+pa_usec_t pa_bytes_to_usec_round_up(uint64_t length, const pa_sample_spec *spec) {
+    size_t fs;
+    pa_usec_t usec;
+
+    pa_assert(spec);
+
+    fs = pa_frame_size(spec);
+    length = (length + fs - 1) / fs;
+
+    usec = (pa_usec_t) length * PA_USEC_PER_SEC;
+
+    return (usec + spec->rate - 1) / spec->rate;
+}
+
+/* Similar to pa_usec_to_bytes() but rounds up, not down */
+
+size_t pa_usec_to_bytes_round_up(pa_usec_t t, const pa_sample_spec *spec) {
+    uint64_t u;
+    pa_assert(spec);
+
+    u = (uint64_t) t * (uint64_t) spec->rate;
+
+    u = (u + PA_USEC_PER_SEC - 1) / PA_USEC_PER_SEC;
+
+    u *= pa_frame_size(spec);
+
+    return (size_t) u;
+}
diff --git a/src/pulsecore/sample-util.h b/src/pulsecore/sample-util.h
index cef70750..06ecb724 100644
--- a/src/pulsecore/sample-util.h
+++ b/src/pulsecore/sample-util.h
@@ -78,4 +78,7 @@ void pa_deinterleave(const void *src, void *dst[], unsigned channels, size_t ss,
 
 void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n);
 
+pa_usec_t pa_bytes_to_usec_round_up(uint64_t length, const pa_sample_spec *spec);
+size_t pa_usec_to_bytes_round_up(pa_usec_t t, const pa_sample_spec *spec);
+
 #endif
-- 
cgit