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#ifndef fooscachehfoo
#define fooscachehfoo
/* $Id$ */
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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/context.h>
#include <pulse/stream.h>
#include <pulse/cdecl.h>
/** \page scache Sample Cache
*
* \section overv_sec Overview
*
* The sample cache provides a simple way of overcoming high network latencies
* and reducing bandwidth. Instead of streaming a sound precisely when it
* should be played, it is stored on the server and only the command to start
* playing it needs to be sent.
*
* \section create_sec Creation
*
* To create a sample, the normal stream API is used (see \ref streams). The
* function pa_stream_connect_upload() will make sure the stream is stored as
* a sample on the server.
*
* To complete the upload, pa_stream_finish_upload() is called and the sample
* will receive the same name as the stream. If the upload should be aborted,
* simply call pa_stream_disconnect().
*
* \section play_sec Playing samples
*
* To play back a sample, simply call pa_context_play_sample():
*
* \code
* pa_operation *o;
*
* o = pa_context_play_sample(my_context,
* "sample2", // Name of my sample
* NULL, // Use default sink
* PA_VOLUME_NORM, // Full volume
* NULL, // Don't need a callback
* NULL
* );
* if (o)
* pa_operation_unref(o);
* \endcode
*
* \section rem_sec Removing samples
*
* When a sample is no longer needed, it should be removed on the server to
* save resources. The sample is deleted using pa_context_remove_sample().
*/
/** \file
* All sample cache related routines */
PA_C_DECL_BEGIN
/** Callback prototype for pa_context_play_sample_with_proplist(). The
* idx value is the index of the sink input object, or
* PA_INVALID_INDEX on failure. \since 0.9.11 */
typedef void (*pa_context_play_sample_cb_t)(pa_context *c, uint32_t idx, void *userdata);
/** Make this stream a sample upload stream */
int pa_stream_connect_upload(pa_stream *s, size_t length);
/** Finish the sample upload, the stream name will become the sample
* name. You cancel a sample upload by issuing
* pa_stream_disconnect() */
int pa_stream_finish_upload(pa_stream *s);
/** Remove a sample from the sample cache. Returns an operation object which may be used to cancel the operation while it is running */
pa_operation* pa_context_remove_sample(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata);
/** Play a sample from the sample cache to the specified device. If
* the latter is NULL use the default sink. Returns an operation
* object */
pa_operation* pa_context_play_sample(
pa_context *c /**< Context */,
const char *name /**< Name of the sample to play */,
const char *dev /**< Sink to play this sample on */,
pa_volume_t volume /**< Volume to play this sample with */ ,
pa_context_success_cb_t cb /**< Call this function after successfully starting playback, or NULL */,
void *userdata /**< Userdata to pass to the callback */);
/** Play a sample from the sample cache to the specified device,
* allowing specification of a property list for the playback
* stream. If the latter is NULL use the default sink. Returns an
* operation object. \since 0.9.11 */
pa_operation* pa_context_play_sample_with_proplist(
pa_context *c /**< Context */,
const char *name /**< Name of the sample to play */,
const char *dev /**< Sink to play this sample on */,
pa_volume_t volume /**< Volume to play this sample with */ ,
pa_proplist *proplist /**< Property list for this sound. The property list of the cached entry will be merged into this property list */,
pa_context_play_sample_cb_t cb /**< Call this function after successfully starting playback, or NULL */,
void *userdata /**< Userdata to pass to the callback */);
PA_C_DECL_END
#endif
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