/* * Copyright (c) 2012 Jan Vesely * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup audio * @brief HelenOS sound server * @{ */ /** @file */ #ifndef AUDIO_SINK_H_ #define AUDIO_SINK_H_ #include <adt/list.h> #include <async.h> #include <stdbool.h> #include <fibril.h> #include <fibril_synch.h> #include <pcm/format.h> #include "audio_source.h" typedef struct audio_sink audio_sink_t; /** Audio sink abstraction structure */ struct audio_sink { /** Link in hound's sink list */ link_t link; /** Protect sink including list of connections */ fibril_mutex_t lock; /** List of all related connections */ list_t connections; /** Sink's name */ char *name; /** Consumes data in this format */ pcm_format_t format; /** Backend data */ void *private_data; /** Connect/disconnect callback */ errno_t (*connection_change)(audio_sink_t *, bool); /** Backend callback to check data */ errno_t (*check_format)(audio_sink_t *); /** new data notifier */ errno_t (*data_available)(audio_sink_t *); }; /** * List instance helper. * @param l link * @return pointer to a sink structure, NULL on failure. */ static inline audio_sink_t *audio_sink_list_instance(link_t *l) { return l ? list_get_instance(l, audio_sink_t, link) : NULL; } errno_t audio_sink_init(audio_sink_t *sink, const char *name, void *private_data, errno_t (*connection_change)(audio_sink_t *, bool), errno_t (*check_format)(audio_sink_t *), errno_t (*data_available)(audio_sink_t *), const pcm_format_t *f); void audio_sink_fini(audio_sink_t *sink); errno_t audio_sink_set_format(audio_sink_t *sink, const pcm_format_t *format); void audio_sink_mix_inputs(audio_sink_t *sink, void *dest, size_t size); #endif /** * @} */