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#ifndef foopolyplibdefhfoo
#define foopolyplibdefhfoo
/* $Id$ */
/***
This file is part of polypaudio.
polypaudio 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 2.1 of the
License, or (at your option) any later version.
polypaudio 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <inttypes.h>
#include <sys/time.h>
#include <time.h>
#include "cdecl.h"
#include "sample.h"
/** \file
* Global definitions */
PA_C_DECL_BEGIN
/** The state of a connection context */
enum pa_context_state {
PA_CONTEXT_UNCONNECTED, /**< The context hasn't been connected yet */
PA_CONTEXT_CONNECTING, /**< A connection is being established */
PA_CONTEXT_AUTHORIZING, /**< The client is authorizing itself to the daemon */
PA_CONTEXT_SETTING_NAME, /**< The client is passing its application name to the daemon */
PA_CONTEXT_READY, /**< The connection is established, the context is ready to execute operations */
PA_CONTEXT_FAILED, /**< The connection failed or was disconnected */
PA_CONTEXT_TERMINATED /**< The connection was terminated cleanly */
};
/** The state of a stream */
enum pa_stream_state {
PA_STREAM_DISCONNECTED, /**< The stream is not yet connected to any sink or source */
PA_STREAM_CREATING, /**< The stream is being created */
PA_STREAM_READY, /**< The stream is established, you may pass audio data to it now */
PA_STREAM_FAILED, /**< An error occured that made the stream invalid */
PA_STREAM_TERMINATED /**< The stream has been terminated cleanly */
};
/** The state of an operation */
enum pa_operation_state {
PA_OPERATION_RUNNING, /**< The operation is still running */
PA_OPERATION_DONE, /**< The operation has been completed */
PA_OPERATION_CANCELED /**< The operation has been canceled */
};
/** An invalid index */
#define PA_INVALID_INDEX ((uint32_t) -1)
/** The direction of a pa_stream object */
enum pa_stream_direction {
PA_STREAM_NODIRECTION, /**< Invalid direction */
PA_STREAM_PLAYBACK, /**< Playback stream */
PA_STREAM_RECORD, /**< Record stream */
PA_STREAM_UPLOAD /**< Sample upload stream */
};
/** Some special flags for stream connections. \since 0.6 */
enum pa_stream_flags {
PA_STREAM_START_CORKED = 1, /**< Create the stream corked, requiring an explicit pa_stream_cork() call to uncork it. */
PA_STREAM_INTERPOLATE_LATENCY = 2 /**< Interpolate the latency for
* this stream. When enabled,
* you can use
* pa_stream_interpolated_xxx()
* for synchronization. Using
* these functions instead of
* pa_stream_get_latency() has
* the advantage of not
* requiring a whole roundtrip
* for responses. Consider using
* this option when frequently
* requesting latency
* information. This is
* especially useful on long latency
* network connections. */
};
/** Playback and record buffer metrics */
struct pa_buffer_attr{
uint32_t maxlength; /**< Maximum length of the buffer */
uint32_t tlength; /**< Playback only: target length of the buffer. The server tries to assure that at least tlength bytes are always available in the buffer */
uint32_t prebuf; /**< Playback only: pre-buffering. The server does not start with playback before at least prebug bytes are available in the buffer */
uint32_t minreq; /**< Playback only: minimum request. The server does not request less than minreq bytes from the client, instead waints until the buffer is free enough to request more bytes at once */
uint32_t fragsize; /**< Recording only: fragment size. The server sends data in blocks of fragsize bytes size. Large values deminish interactivity with other operations on the connection context but decrease control overhead. */
};
/** Error values as used by pa_context_errno(). Use pa_strerror() to convert these values to human readable strings */
enum {
PA_ERROR_OK, /**< No error */
PA_ERROR_ACCESS, /**< Access failure */
PA_ERROR_COMMAND, /**< Unknown command */
PA_ERROR_INVALID, /**< Invalid argument */
PA_ERROR_EXIST, /**< Entity exists */
PA_ERROR_NOENTITY, /**< No such entity */
PA_ERROR_CONNECTIONREFUSED, /**< Connection refused */
PA_ERROR_PROTOCOL, /**< Protocol error */
PA_ERROR_TIMEOUT, /**< Timeout */
PA_ERROR_AUTHKEY, /**< No authorization key */
PA_ERROR_INTERNAL, /**< Internal error */
PA_ERROR_CONNECTIONTERMINATED, /**< Connection terminated */
PA_ERROR_KILLED, /**< Entity killed */
PA_ERROR_INVALIDSERVER, /**< Invalid server */
PA_ERROR_INITFAILED, /**< Module initialization failed */
PA_ERROR_MAX /**< Not really an error but the first invalid error code */
};
/** Subscription event mask, as used by pa_context_subscribe() */
enum pa_subscription_mask {
PA_SUBSCRIPTION_MASK_NULL = 0, /**< No events */
PA_SUBSCRIPTION_MASK_SINK = 1, /**< Sink events */
PA_SUBSCRIPTION_MASK_SOURCE = 2, /**< Source events */
PA_SUBSCRIPTION_MASK_SINK_INPUT = 4, /**< Sink input events */
PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT = 8, /**< Source output events */
PA_SUBSCRIPTION_MASK_MODULE = 16, /**< Module events */
PA_SUBSCRIPTION_MASK_CLIENT = 32, /**< Client events */
PA_SUBSCRIPTION_MASK_SAMPLE_CACHE = 64, /**< Sample cache events */
PA_SUBSCRIPTION_MASK_SERVER = 128, /**< Other global server changes. \since 0.4 */
PA_SUBSCRIPTION_MASK_AUTOLOAD = 256 /**< Autoload table events. \since 0.5 */
};
/** Subscription event types, as used by pa_context_subscribe() */
enum pa_subscription_event_type {
PA_SUBSCRIPTION_EVENT_SINK = 0, /**< Event type: Sink */
PA_SUBSCRIPTION_EVENT_SOURCE = 1, /**< Event type: Source */
PA_SUBSCRIPTION_EVENT_SINK_INPUT = 2, /**< Event type: Sink input */
PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT = 3, /**< Event type: Source output */
PA_SUBSCRIPTION_EVENT_MODULE = 4, /**< Event type: Module */
PA_SUBSCRIPTION_EVENT_CLIENT = 5, /**< Event type: Client */
PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE = 6, /**< Event type: Sample cache item */
PA_SUBSCRIPTION_EVENT_SERVER = 7, /**< Event type: Global server change, only occuring with PA_SUBSCRIPTION_EVENT_CHANGE. \since 0.4 */
PA_SUBSCRIPTION_EVENT_AUTOLOAD = 8, /**< Event type: Autoload table changes. \since 0.5 */
PA_SUBSCRIPTION_EVENT_FACILITY_MASK = 15, /**< A mask to extract the event type from an event value */
PA_SUBSCRIPTION_EVENT_NEW = 0, /**< A new object was created */
PA_SUBSCRIPTION_EVENT_CHANGE = 16, /**< A property of the object was modified */
PA_SUBSCRIPTION_EVENT_REMOVE = 32, /**< An object was removed */
PA_SUBSCRIPTION_EVENT_TYPE_MASK = 16+32 /**< A mask to extract the event operation from an event value */
};
/** Return one if an event type t matches an event mask bitfield */
#define pa_subscription_match_flags(m, t) (!!((m) & (1 << ((t) & PA_SUBSCRIPTION_EVENT_FACILITY_MASK))))
/** A structure for latency info. See pa_stream_get_latency(). The
* total output latency a sample that is written with
* pa_stream_write() takes to be played may be estimated by
* sink_usec+buffer_usec+transport_usec. The output buffer to which
* buffer_usec relates may be manipulated freely (with
* pa_stream_write()'s delta argument, pa_stream_flush() and friends),
* the buffers sink_usec/source_usec relates to is a first-in
* first-out buffer which cannot be flushed or manipulated in any
* way. The total input latency a sample that is recorded takes to be
* delivered to the application is:
* source_usec+buffer_usec+transport_usec-sink_usec. (Take care of
* sign issues!) When connected to a monitor source sink_usec contains
* the latency of the owning sink.*/
struct pa_latency_info {
pa_usec_t buffer_usec; /**< Time in usecs the current buffer takes to play. For both playback and record streams. */
pa_usec_t sink_usec; /**< Time in usecs a sample takes to be played on the sink. For playback streams and record streams connected to a monitor source. */
pa_usec_t source_usec; /**< Time in usecs a sample takes from being recorded to being delivered to the application. Only for record streams. \since 0.5*/
pa_usec_t transport_usec; /**< Estimated time in usecs a sample takes to be transferred to/from the daemon. For both playback and record streams. \since 0.5 */
int playing; /**< Non-zero when the stream is currently playing. Only for playback streams. */
uint32_t queue_length; /**< Queue size in bytes. For both playback and recrd streams. */
int synchronized_clocks; /**< Non-zero if the local and the
* remote machine have synchronized
* clocks. If synchronized clocks are
* detected transport_usec becomes much
* more reliable. However, the code that
* detects synchronized clocks is very
* limited und unreliable itself. \since
* 0.5 */
struct timeval timestamp; /**< The time when this latency info was current */
uint64_t counter; /**< The byte counter current when the latency info was requested. \since 0.6 */
};
/** A structure for the spawn api. This may be used to integrate auto
* spawned daemons into your application. For more information see
* pa_context_connect(). When spawning a new child process the
* waitpid() is used on the child's PID. The spawn routine will not
* block or ignore SIGCHLD signals, since this cannot be done in a
* thread compatible way. You might have to do this in
* prefork/postfork. \since 0.4 */
struct pa_spawn_api {
void (*prefork)(void); /**< Is called just before the fork in the parent process. May be NULL. */
void (*postfork)(void); /**< Is called immediately after the fork in the parent process. May be NULL.*/
void (*atfork)(void); /**< Is called immediately after the
* fork in the child process. May be
* NULL. It is not safe to close all
* file descriptors in this function
* unconditionally, since a UNIX socket
* (created using socketpair()) is
* passed to the new process. */
};
PA_C_DECL_END
#endif
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