/*
* Copyright (c) 2013 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
*/
#include <errno.h>
#include <stdlib.h>
#include "log.h"
#include "connection.h"
/**
* Create connection between source and sink.
* @param source Valid source structure.
* @param sink Valid sink structure.
* @return pointer to a valid connection structure, NULL on failure.
*
* Reports new connection to both the source and sink.
*/
connection_t *connection_create(audio_source_t *source, audio_sink_t *sink)
{
assert(source);
assert(sink);
connection_t *conn = malloc(sizeof(connection_t));
if (conn) {
audio_pipe_init(&conn->fifo);
link_initialize(&conn->source_link);
link_initialize(&conn->sink_link);
link_initialize(&conn->hound_link);
conn->sink = sink;
conn->source = source;
list_append(&conn->source_link, &source->connections);
fibril_mutex_lock(&sink->lock);
list_append(&conn->sink_link, &sink->connections);
fibril_mutex_unlock(&sink->lock);
audio_sink_set_format(sink, audio_source_format(source));
if (source->connection_change)
source->connection_change(source, true);
if (sink->connection_change)
sink->connection_change(sink, true);
log_debug("CONNECTED: %s -> %s", source->name, sink->name);
}
return conn;
}
/**
* Destroy existing connection
* @param connection The connection to destroy.
*
* Disconnects from both the source and the sink.
*/
void connection_destroy(connection_t *connection)
{
assert(connection);
assert(!link_in_use(&connection->hound_link));
list_remove(&connection->source_link);
fibril_mutex_lock(&connection->sink->lock);
list_remove(&connection->sink_link);
fibril_mutex_unlock(&connection->sink->lock);
if (connection->sink && connection->sink->connection_change)
connection->sink->connection_change(connection->sink, false);
if (connection->source && connection->source->connection_change)
connection->source->connection_change(connection->source, false);
audio_pipe_fini(&connection->fifo);
log_debug("DISCONNECTED: %s -> %s",
connection->source->name, connection->sink->name);
free(connection);
}
/**
* Update and mix data provided by the source.
* @param connection the connection to add.
* @param data Destination audio buffer.
* @param size size of the destination audio buffer.
* @param format format of the destination audio buffer.
*/
errno_t connection_add_source_data(connection_t *connection, void *data,
size_t size, pcm_format_t format)
{
assert(connection);
if (!data)
return EBADMEM;
const size_t needed_frames = pcm_format_size_to_frames(size, &format);
if (needed_frames > audio_pipe_frames(&connection->fifo) &&
connection->source->update_available_data) {
log_debug("Asking source to provide more data");
connection->source->update_available_data(
connection->source, size);
}
log_verbose("Data available after update: %zu",
audio_pipe_bytes(&connection->fifo));
size_t ret =
audio_pipe_mix_data(&connection->fifo, data, size, &format);
if (ret != size)
log_warning("Connection failed to provide enough data %zd/%zu",
ret, size);
return EOK;
}
/**
* Add new data to the connection buffer.
* @param connection Target conneciton.
* @aparam adata Reference counted audio data buffer.
* @return Error code.
*/
errno_t connection_push_data(connection_t *connection,
audio_data_t *adata)
{
assert(connection);
assert(adata);
const errno_t ret = audio_pipe_push(&connection->fifo, adata);
if (ret == EOK && connection->sink->data_available)
connection->sink->data_available(connection->sink);
return ret;
}
/**
* @}
*/