From 79d396583b856fc5bfa3470e0093e2cf204ef24c Mon Sep 17 00:00:00 2001
From: Simon Wilson <simonwilson@google.com>
Date: Wed, 25 May 2011 13:44:23 -0700
Subject: Initial contribution

---
 include/tinyalsa/asoundlib.h | 115 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 include/tinyalsa/asoundlib.h

(limited to 'include')

diff --git a/include/tinyalsa/asoundlib.h b/include/tinyalsa/asoundlib.h
new file mode 100644
index 0000000..38d3af1
--- /dev/null
+++ b/include/tinyalsa/asoundlib.h
@@ -0,0 +1,115 @@
+/* asoundlib.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 ASOUNDLIB_H
+#define ASOUNDLIB_H
+
+
+/*
+ * PCM API
+ */
+
+struct pcm;
+
+#define PCM_OUT        0x00000000
+#define PCM_IN         0x10000000
+
+/* Bit formats */
+enum pcm_format {
+    PCM_FORMAT_S16_LE = 0,
+    PCM_FORMAT_S32_LE,
+
+    PCM_FORMAT_MAX,
+};
+
+/* Configuration for a stream */
+struct pcm_config {
+    unsigned int channels;
+    unsigned int rate;
+    unsigned int period_size;
+    unsigned int period_count;
+    enum pcm_format format;
+};
+
+/* Open and close a stream */
+struct pcm *pcm_open(unsigned int device, unsigned int flags, struct pcm_config *config);
+int pcm_close(struct pcm *pcm);
+int pcm_is_ready(struct pcm *pcm);
+
+/* Set and get config */
+int pcm_get_config(struct pcm *pcm, struct pcm_config *config);
+int pcm_set_config(struct pcm *pcm, struct pcm_config *config);
+
+/* Returns a human readable reason for the last error */
+const char *pcm_get_error(struct pcm *pcm);
+
+/* Returns the buffer size (int bytes) that should be used for pcm_write.
+ * This will be 1/2 of the actual fifo size.
+ */
+unsigned int pcm_get_buffer_size(struct pcm *pcm);
+
+/* Returns the pcm latency in ms */
+unsigned int pcm_get_latency(struct pcm *pcm);
+
+/* Write data to the fifo.
+ * Will start playback on the first write or on a write that
+ * occurs after a fifo underrun.
+ */
+int pcm_write(struct pcm *pcm, void *data, unsigned int count);
+int pcm_read(struct pcm *pcm, void *data, unsigned int count);
+
+
+/*
+ * MIXER API
+ */
+
+struct mixer;
+struct mixer_ctl;
+
+/* Open and close a mixer */
+struct mixer *mixer_open(unsigned int device);
+void mixer_close(struct mixer *mixer);
+
+/* Obtain mixer controls */
+int mixer_get_num_ctls(struct mixer *mixer);
+struct mixer_ctl *mixer_get_ctl(struct mixer *mixer, unsigned int id);
+struct mixer_ctl *mixer_get_ctl_by_name(struct mixer *mixer, const char *name);
+
+/* Set and get mixer controls */
+int mixer_ctl_get_percent(struct mixer_ctl *ctl);
+int mixer_ctl_set_percent(struct mixer_ctl *ctl, int percent);
+
+int mixer_ctl_get_int(struct mixer_ctl *ctl);
+int mixer_ctl_set_int(struct mixer_ctl *ctl, int);
+int mixer_ctl_get_step(struct mixer_ctl *ctl);
+
+int mixer_ctl_get_enum(struct mixer_ctl *ctl, const char *string, unsigned int size);
+int mixer_ctl_set_enum(struct mixer_ctl *ctl, unsigned int id);
+int mixer_ctl_set_enum_by_name(struct mixer_ctl *ctl, const char *string);
+
+#endif
-- 
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