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/*
* Copyright (C) 2003-2009 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "input_stream.h"
#include "input_registry.h"
#include "input_plugin.h"
#include "conf.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
/**
* Find the "input" configuration block for the specified plugin.
*
* @param plugin_name the name of the input plugin
* @return the configuration block, or NULL if none was configured
*/
static const struct config_param *
input_plugin_config(const char *plugin_name)
{
const struct config_param *param = NULL;
while ((param = config_get_next_param(CONF_INPUT, param)) != NULL) {
const char *name =
config_get_block_string(param, "plugin", NULL);
if (name == NULL)
g_error("input configuration without 'plugin' name in line %d",
param->line);
if (strcmp(name, plugin_name) == 0)
return param;
}
return NULL;
}
void input_stream_global_init(void)
{
for (unsigned i = 0; input_plugins[i] != NULL; ++i) {
const struct input_plugin *plugin = input_plugins[i];
const struct config_param *param =
input_plugin_config(plugin->name);
if (!config_get_block_bool(param, "enabled", true))
/* the plugin is disabled in mpd.conf */
continue;
if (plugin->init == NULL || plugin->init(param))
input_plugins_enabled[i] = true;
}
}
void input_stream_global_finish(void)
{
for (unsigned i = 0; input_plugins[i] != NULL; ++i)
if (input_plugins_enabled[i] &&
input_plugins[i]->finish != NULL)
input_plugins[i]->finish();
}
bool
input_stream_open(struct input_stream *is, const char *url)
{
is->seekable = false;
is->ready = false;
is->offset = 0;
is->size = -1;
is->error = 0;
is->mime = NULL;
for (unsigned i = 0; input_plugins[i] != NULL; ++i) {
const struct input_plugin *plugin = input_plugins[i];
if (input_plugins_enabled[i] && plugin->open(is, url)) {
assert(is->plugin != NULL);
assert(is->plugin->close != NULL);
assert(is->plugin->read != NULL);
assert(is->plugin->eof != NULL);
assert(!is->seekable || is->plugin->seek != NULL);
return true;
}
}
return false;
}
bool
input_stream_seek(struct input_stream *is, goffset offset, int whence)
{
if (is->plugin->seek == NULL)
return false;
return is->plugin->seek(is, offset, whence);
}
struct tag *
input_stream_tag(struct input_stream *is)
{
assert(is != NULL);
return is->plugin->tag != NULL
? is->plugin->tag(is)
: NULL;
}
size_t
input_stream_read(struct input_stream *is, void *ptr, size_t size)
{
assert(ptr != NULL);
assert(size > 0);
return is->plugin->read(is, ptr, size);
}
void input_stream_close(struct input_stream *is)
{
is->plugin->close(is);
g_free(is->mime);
}
bool input_stream_eof(struct input_stream *is)
{
return is->plugin->eof(is);
}
int input_stream_buffer(struct input_stream *is)
{
if (is->plugin->buffer == NULL)
return 0;
return is->plugin->buffer(is);
}
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