added limits for frames and channels

1 files changed, 62 insertions, 0 deletions

diff --git a/include/tinyalsa/limits.h b/include/tinyalsa/limits.h
new file mode 100644
index 0000000..6f788c2
--- /dev/null
+++ b/include/tinyalsa/limits.h
@@ -0,0 +1,62 @@
+/* limits.h
+**
+** Copyright 2011, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of The Android Open Source Project nor the names of
+**       its contributors may be used to endorse or promote products derived
+**       from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+** DAMAGE.
+*/
+
+#ifndef TINYALSA_LIMITS_H
+#define TINYALSA_LIMITS_H
+
+#include <tinyalsa/interval.h>
+
+#include <limits.h>
+#include <stdint.h>
+
+#define TINYALSA_SIGNED_INTERVAL_MAX SSIZE_MAX
+#define TINYALSA_SIGNED_INTERVAL_MIN SSIZE_MIN
+
+#define TINYALSA_UNSIGNED_INTERVAL_MAX SIZE_MAX
+#define TINYALSA_UNSIGNED_INTERVAL_MIN SIZE_MIN
+
+#define TINYALSA_CHANNELS_MAX 32U
+#define TINYALSA_CHANNELS_MIN 1U
+
+#define TINYALSA_FRAMES_MAX (ULONG_MAX / (TINYALSA_CHANNELS_MAX * 4))
+#define TINYALSA_FRAMES_MIN 0U
+
+#if TINYALSA_FRAMES_MAX > TINYALSA_UNSIGNED_INTERVAL_MAX
+#error "Frames max exceeds measurable value."
+#endif
+
+#if TINYALSA_FRAMES_MIN < TINYALSA_UNSIGNED_INTERVAL_MIN
+#error "Frames min exceeds measurable value."
+#endif
+
+extern const struct tinyalsa_unsigned_interval tinyalsa_channels_limit;
+
+extern const struct tinyalsa_unsigned_interval tinyalsa_frames_limit;
+
+#endif /* TINYALSA_LIMITS_H */
+