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/scache.h | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 src/pulse/scache.h (limited to 'src/pulse/scache.h') diff --git a/src/pulse/scache.h b/src/pulse/scache.h new file mode 100644 index 00000000..e32703d4 --- /dev/null +++ b/src/pulse/scache.h @@ -0,0 +1,100 @@ +#ifndef fooscachehfoo +#define fooscachehfoo + +/* $Id$ */ + +/*** + 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 + +/** \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 + +/** 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 samp + * le upload by issuing pa_stream_disconnect() */ +int pa_stream_finish_upload(pa_stream *s); + +/** 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 */); + +/** 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, void *userdata); + +PA_C_DECL_END + +#endif -- cgit