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/*
* Copyright (C) 2003-2011 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 "InputRegistry.hxx"
#include "InputPlugin.hxx"
#include "input/RewindInputPlugin.hxx"
extern "C" {
#include "uri.h"
}
#include <glib.h>
#include <assert.h>
static inline GQuark
input_quark(void)
{
return g_quark_from_static_string("input");
}
struct input_stream *
input_stream_open(const char *url,
GMutex *mutex, GCond *cond,
GError **error_r)
{
GError *error = NULL;
assert(mutex != NULL);
assert(error_r == NULL || *error_r == NULL);
input_plugins_for_each_enabled(plugin) {
struct input_stream *is;
is = plugin->open(url, mutex, cond, &error);
if (is != NULL) {
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);
is = input_rewind_open(is);
return is;
} else if (error != NULL) {
g_propagate_error(error_r, error);
return NULL;
}
}
g_set_error(error_r, input_quark(), 0, "Unrecognized URI");
return NULL;
}
bool
input_stream_check(struct input_stream *is, GError **error_r)
{
assert(is != NULL);
assert(is->plugin != NULL);
return is->plugin->check == NULL ||
is->plugin->check(is, error_r);
}
void
input_stream_update(struct input_stream *is)
{
assert(is != NULL);
assert(is->plugin != NULL);
if (is->plugin->update != NULL)
is->plugin->update(is);
}
void
input_stream_wait_ready(struct input_stream *is)
{
assert(is != NULL);
assert(is->mutex != NULL);
assert(is->cond != NULL);
while (true) {
input_stream_update(is);
if (is->ready)
break;
g_cond_wait(is->cond, is->mutex);
}
}
void
input_stream_lock_wait_ready(struct input_stream *is)
{
assert(is != NULL);
assert(is->mutex != NULL);
assert(is->cond != NULL);
g_mutex_lock(is->mutex);
input_stream_wait_ready(is);
g_mutex_unlock(is->mutex);
}
bool
input_stream_cheap_seeking(const struct input_stream *is)
{
return is->seekable && (is->uri == NULL || !uri_has_scheme(is->uri));
}
bool
input_stream_seek(struct input_stream *is, goffset offset, int whence,
GError **error_r)
{
assert(is != NULL);
assert(is->plugin != NULL);
if (is->plugin->seek == NULL)
return false;
return is->plugin->seek(is, offset, whence, error_r);
}
bool
input_stream_lock_seek(struct input_stream *is, goffset offset, int whence,
GError **error_r)
{
assert(is != NULL);
assert(is->plugin != NULL);
if (is->plugin->seek == NULL)
return false;
if (is->mutex == NULL)
/* no locking */
return input_stream_seek(is, offset, whence, error_r);
g_mutex_lock(is->mutex);
bool success = input_stream_seek(is, offset, whence, error_r);
g_mutex_unlock(is->mutex);
return success;
}
struct tag *
input_stream_tag(struct input_stream *is)
{
assert(is != NULL);
assert(is->plugin != NULL);
return is->plugin->tag != NULL
? is->plugin->tag(is)
: NULL;
}
struct tag *
input_stream_lock_tag(struct input_stream *is)
{
assert(is != NULL);
assert(is->plugin != NULL);
if (is->plugin->tag == NULL)
return nullptr;
if (is->mutex == NULL)
/* no locking */
return input_stream_tag(is);
g_mutex_lock(is->mutex);
struct tag *tag = input_stream_tag(is);
g_mutex_unlock(is->mutex);
return tag;
}
bool
input_stream_available(struct input_stream *is)
{
assert(is != NULL);
assert(is->plugin != NULL);
return is->plugin->available != NULL
? is->plugin->available(is)
: true;
}
size_t
input_stream_read(struct input_stream *is, void *ptr, size_t size,
GError **error_r)
{
assert(ptr != NULL);
assert(size > 0);
return is->plugin->read(is, ptr, size, error_r);
}
size_t
input_stream_lock_read(struct input_stream *is, void *ptr, size_t size,
GError **error_r)
{
assert(ptr != NULL);
assert(size > 0);
if (is->mutex == NULL)
/* no locking */
return input_stream_read(is, ptr, size, error_r);
g_mutex_lock(is->mutex);
size_t nbytes = input_stream_read(is, ptr, size, error_r);
g_mutex_unlock(is->mutex);
return nbytes;
}
void input_stream_close(struct input_stream *is)
{
is->plugin->close(is);
}
bool input_stream_eof(struct input_stream *is)
{
return is->plugin->eof(is);
}
bool
input_stream_lock_eof(struct input_stream *is)
{
assert(is != NULL);
assert(is->plugin != NULL);
if (is->mutex == NULL)
/* no locking */
return input_stream_eof(is);
g_mutex_lock(is->mutex);
bool eof = input_stream_eof(is);
g_mutex_unlock(is->mutex);
return eof;
}
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