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authorLennart Poettering <lennart@poettering.net>2006-06-19 21:53:48 +0000
committerLennart Poettering <lennart@poettering.net>2006-06-19 21:53:48 +0000
commitf44ba092651aa75055e109e04b4164ea92ae7fdc (patch)
tree5dfe076191b32946e78edf64d584d0a65f320013 /src/pulse/simple.h
parentdd21f11deda64e65a6f75817496534c2c9dda1a8 (diff)
big s/polyp/pulse/g
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f
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+#ifndef foosimplehfoo
+#define foosimplehfoo
+
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ 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 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 <sys/types.h>
+
+#include <pulse/sample.h>
+#include <pulse/channelmap.h>
+#include <pulse/def.h>
+#include <pulse/cdecl.h>
+
+/** \page simple Simple API
+ *
+ * \section overv_sec Overview
+ *
+ * The simple API is designed for applications with very basic sound
+ * playback or capture needs. It can only support a single stream per
+ * connection and has no handling of complex features like events, channel
+ * mappings and volume control. It is, however, very simple to use and
+ * quite sufficent for many programs.
+ *
+ * \section conn_sec Connecting
+ *
+ * The first step before using the sound system is to connect to the
+ * server. This is normally done this way:
+ *
+ * \code
+ * pa_simple *s;
+ * pa_sample_spec ss;
+ *
+ * ss.format = PA_SAMPLE_S16_NE;
+ * ss.channels = 2;
+ * ss.rate = 44100;
+ *
+ * s = pa_simple_new(NULL, // Use the default server.
+ * "Fooapp", // Our application's name.
+ * PA_STREAM_PLAYBACK,
+ * NULL, // Use the default device.
+ * "Music", // Description of our stream.
+ * &ss, // Our sample format.
+ * NULL, // Use default channel map
+ * NULL, // Use default buffering attributes.
+ * NULL, // Ignore error code.
+ * );
+ * \endcode
+ *
+ * At this point a connected object is returned, or NULL if there was a
+ * problem connecting.
+ *
+ * \section transfer_sec Transferring data
+ *
+ * Once the connection is established to the server, data can start flowing.
+ * Using the connection is very similar to the normal read() and write()
+ * system calls. The main difference is that they're call pa_simple_read()
+ * and pa_simple_write(). Note that these operations always block.
+ *
+ * \section ctrl_sec Buffer control
+ *
+ * If a playback stream is used then a few other operations are available:
+ *
+ * \li pa_simple_drain() - Will wait for all sent data to finish playing.
+ * \li pa_simple_flush() - Will throw away all data currently in buffers.
+ * \li pa_simple_get_playback_latency() - Will return the total latency of
+ * the playback pipeline.
+ *
+ * \section cleanup_sec Cleanup
+ *
+ * Once playback or capture is complete, the connection should be closed
+ * and resources freed. This is done through:
+ *
+ * \code
+ * pa_simple_free(s);
+ * \endcode
+ */
+
+/** \file
+ * A simple but limited synchronous playback and recording
+ * API. This is a synchronous, simplified wrapper around the standard
+ * asynchronous API. */
+
+/** \example pacat-simple.c
+ * A simple playback tool using the simple API */
+
+/** \example parec-simple.c
+ * A simple recording tool using the simple API */
+
+PA_C_DECL_BEGIN
+
+/** \struct pa_simple
+ * An opaque simple connection object */
+typedef struct pa_simple pa_simple;
+
+/** Create a new connection to the server */
+pa_simple* pa_simple_new(
+ const char *server, /**< Server name, or NULL for default */
+ const char *name, /**< A descriptive name for this client (application name, ...) */
+ pa_stream_direction_t dir, /**< Open this stream for recording or playback? */
+ const char *dev, /**< Sink (resp. source) name, or NULL for default */
+ const char *stream_name, /**< A descriptive name for this client (application name, song title, ...) */
+ const pa_sample_spec *ss, /**< The sample type to use */
+ const pa_channel_map *map, /**< The channel map to use, or NULL for default */
+ const pa_buffer_attr *attr, /**< Buffering attributes, or NULL for default */
+ int *error /**< A pointer where the error code is stored when the routine returns NULL. It is OK to pass NULL here. */
+ );
+
+/** Close and free the connection to the server. The connection objects becomes invalid when this is called. */
+void pa_simple_free(pa_simple *s);
+
+/** Write some data to the server */
+int pa_simple_write(pa_simple *s, const void*data, size_t length, int *error);
+
+/** Wait until all data already written is played by the daemon */
+int pa_simple_drain(pa_simple *s, int *error);
+
+/** Read some data from the server */
+int pa_simple_read(pa_simple *s, void*data, size_t length, int *error);
+
+/** Return the playback latency. \since 0.5 */
+pa_usec_t pa_simple_get_latency(pa_simple *s, int *error);
+
+/** Flush the playback buffer. \since 0.5 */
+int pa_simple_flush(pa_simple *s, int *error);
+
+PA_C_DECL_END
+
+#endif