From f44ba092651aa75055e109e04b4164ea92ae7fdc Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 19 Jun 2006 21:53:48 +0000 Subject: big s/polyp/pulse/g git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/pulse/simple.h | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 src/pulse/simple.h (limited to 'src/pulse/simple.h') diff --git a/src/pulse/simple.h b/src/pulse/simple.h new file mode 100644 index 00000000..0438d319 --- /dev/null +++ b/src/pulse/simple.h @@ -0,0 +1,146 @@ +#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 + +#include +#include +#include +#include + +/** \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 -- cgit