gstreamer/plugins/elements/gstqueue.c
Wim Taymans 4a38cd655b Misc fixes and cleanups
Original commit message from CVS:
Misc fixes and cleanups
A reworked gstplay. Now it is called gstmediaplay. gstplay is a custom
widget that can display media and is to become a bonobo component soon.
put the tables of the mpeg audio encoder in a header file.
maybe faster quantisation for the mpeg encoder.
2000-10-30 21:02:08 +00:00

317 lines
8.9 KiB
C

/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
//#define DEBUG_ENABLED
//#define STATUS_ENABLED
#ifdef STATUS_ENABLED
#define STATUS(A) DEBUG(A, gst_element_get_name(GST_ELEMENT(queue)))
#else
#define STATUS(A)
#endif
#include <gstqueue.h>
#include <gst/gstarch.h>
GstElementDetails gst_queue_details = {
"Queue",
"Connection",
"Simple data queue",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* Queue signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LEVEL,
ARG_MAX_LEVEL,
};
static void gst_queue_class_init(GstQueueClass *klass);
static void gst_queue_init(GstQueue *queue);
static void gst_queue_set_arg(GtkObject *object,GtkArg *arg,guint id);
static void gst_queue_get_arg(GtkObject *object,GtkArg *arg,guint id);
static void gst_queue_push(GstConnection *connection);
static void gst_queue_chain(GstPad *pad,GstBuffer *buf);
static void gst_queue_flush(GstQueue *queue);
static GstElementStateReturn gst_queue_change_state(GstElement *element);
static GstConnectionClass *parent_class = NULL;
//static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_queue_get_type(void) {
static GtkType queue_type = 0;
if (!queue_type) {
static const GtkTypeInfo queue_info = {
"GstQueue",
sizeof(GstQueue),
sizeof(GstQueueClass),
(GtkClassInitFunc)gst_queue_class_init,
(GtkObjectInitFunc)gst_queue_init,
(GtkArgSetFunc)gst_queue_set_arg,
(GtkArgGetFunc)gst_queue_get_arg,
(GtkClassInitFunc)NULL,
};
queue_type = gtk_type_unique(GST_TYPE_CONNECTION,&queue_info);
}
return queue_type;
}
static void gst_queue_class_init(GstQueueClass *klass) {
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
GstConnectionClass *gstconnection_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
gstconnection_class = (GstConnectionClass*)klass;
parent_class = gtk_type_class(GST_TYPE_CONNECTION);
gtk_object_add_arg_type("GstQueue::level", GTK_TYPE_INT,
GTK_ARG_READABLE, ARG_LEVEL);
gtk_object_add_arg_type("GstQueue::max_level", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_MAX_LEVEL);
gstconnection_class->push = gst_queue_push;
gtkobject_class->set_arg = gst_queue_set_arg;
gtkobject_class->get_arg = gst_queue_get_arg;
gstelement_class->change_state = gst_queue_change_state;
}
static void gst_queue_init(GstQueue *queue) {
queue->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
gst_element_add_pad(GST_ELEMENT(queue),queue->sinkpad);
gst_pad_set_chain_function(queue->sinkpad,gst_queue_chain);
queue->srcpad = gst_pad_new("src",GST_PAD_SRC);
gst_element_add_pad(GST_ELEMENT(queue),queue->srcpad);
queue->queue = NULL;
queue->level_buffers = 0;
queue->max_buffers = 20;
queue->level_bytes = 0;
queue->size_buffers = 0;
queue->size_bytes = 0;
queue->emptylock = g_mutex_new();
queue->emptycond = g_cond_new();
queue->fulllock = g_mutex_new();
queue->fullcond = g_cond_new();
}
GstElement *gst_queue_new(gchar *name) {
GstElement *queue = GST_ELEMENT(gtk_type_new(GST_TYPE_QUEUE));
gst_element_set_name(GST_ELEMENT(queue),name);
return queue;
}
static void gst_queue_cleanup_buffers(gpointer data, gpointer user_data)
{
DEBUG("queue: %s cleaning buffer %p\n", (gchar *)user_data, data);
gst_buffer_unref(GST_BUFFER(data));
}
static void gst_queue_flush(GstQueue *queue) {
g_slist_foreach(queue->queue, gst_queue_cleanup_buffers, gst_element_get_name(GST_ELEMENT(queue)));
g_slist_free(queue->queue);
queue->queue = NULL;
queue->level_buffers = 0;
}
static void gst_queue_chain(GstPad *pad,GstBuffer *buf) {
GstQueue *queue;
gboolean tosignal = FALSE;
guchar *name;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
g_return_if_fail(buf != NULL);
queue = GST_QUEUE(pad->parent);
name = gst_element_get_name(GST_ELEMENT(queue));
/* we have to lock the queue since we span threads */
DEBUG("queue: try have queue lock\n");
DEBUG("queue: %s adding buffer %p %ld\n", name, buf, pthread_self());
GST_LOCK(queue);
DEBUG("queue: have queue lock\n");
if (GST_BUFFER_FLAG_IS_SET(buf, GST_BUFFER_FLUSH)) {
gst_queue_flush(queue);
}
DEBUG("queue: %s: chain %d %p\n", name, queue->level_buffers, buf);
while (queue->level_buffers >= queue->max_buffers) {
DEBUG("queue: %s waiting %d\n", name, queue->level_buffers);
STATUS("%s: O\n");
GST_UNLOCK(queue);
g_mutex_lock(queue->fulllock);
g_cond_wait(queue->fullcond,queue->fulllock);
g_mutex_unlock(queue->fulllock);
GST_LOCK(queue);
STATUS("%s: O+\n");
DEBUG("queue: %s waiting done %d\n", name, queue->level_buffers);
}
/* put the buffer on the tail of the list */
queue->queue = g_slist_append(queue->queue,buf);
STATUS("%s: +\n");
/* if we were empty, but aren't any more, signal a condition */
tosignal = (queue->level_buffers >= 0);
queue->level_buffers++;
/* we can unlock now */
DEBUG("queue: %s chain %d end signal(%d,%p)\n", name, queue->level_buffers, tosignal, queue->emptycond);
GST_UNLOCK(queue);
if (tosignal) {
STATUS("%s: >\n");
g_mutex_lock(queue->emptylock);
g_cond_signal(queue->emptycond);
g_mutex_unlock(queue->emptylock);
STATUS("%s: >>\n");
}
}
static void gst_queue_push(GstConnection *connection) {
GstQueue *queue = GST_QUEUE(connection);
GstBuffer *buf = NULL;
GSList *front;
gboolean tosignal = FALSE;
guchar *name;
name = gst_element_get_name(GST_ELEMENT(queue));
/* have to lock for thread-safety */
DEBUG("queue: try have queue lock\n");
GST_LOCK(queue);
DEBUG("queue: %s push %d %ld %p\n", name, queue->level_buffers, pthread_self(), queue->emptycond);
DEBUG("queue: have queue lock\n");
while (!queue->level_buffers) {
STATUS("%s: U released lock\n");
GST_UNLOCK(queue);
g_mutex_lock(queue->emptylock);
g_cond_wait(queue->emptycond,queue->emptylock);
g_mutex_unlock(queue->emptylock);
GST_LOCK(queue);
STATUS("%s: U- getting lock\n");
}
front = queue->queue;
buf = (GstBuffer *)(front->data);
queue->queue = g_slist_remove_link(queue->queue,front);
g_slist_free(front);
queue->level_buffers--;
STATUS("%s: -\n");
tosignal = queue->level_buffers < queue->max_buffers;
GST_UNLOCK(queue);
if (tosignal) {
g_mutex_lock(queue->fulllock);
STATUS("%s: < \n");
g_cond_signal(queue->fullcond);
STATUS("%s: << \n");
g_mutex_unlock(queue->fulllock);
}
DEBUG("queue: %s pushing %d %p \n", name, queue->level_buffers, buf);
gst_pad_push(queue->srcpad,buf);
DEBUG("queue: %s pushing %d done \n", name, queue->level_buffers);
/* unlock now */
}
static GstElementStateReturn gst_queue_change_state(GstElement *element) {
GstQueue *queue;
g_return_val_if_fail(GST_IS_QUEUE(element),GST_STATE_FAILURE);
queue = GST_QUEUE(element);
DEBUG("gstqueue: state pending %d\n", GST_STATE_PENDING(element));
/* if going down into NULL state, clear out buffers*/
if (GST_STATE_PENDING(element) == GST_STATE_READY) {
/* otherwise (READY or higher) we need to open the file */
gst_queue_flush(queue);
}
/* if we haven't failed already, give the parent class a chance to ;-) */
if (GST_ELEMENT_CLASS(parent_class)->change_state)
return GST_ELEMENT_CLASS(parent_class)->change_state(element);
return GST_STATE_SUCCESS;
}
static void gst_queue_set_arg(GtkObject *object,GtkArg *arg,guint id) {
GstQueue *queue;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_QUEUE(object));
queue = GST_QUEUE(object);
switch(id) {
case ARG_MAX_LEVEL:
queue->max_buffers = GTK_VALUE_INT(*arg);
break;
default:
break;
}
}
static void gst_queue_get_arg(GtkObject *object,GtkArg *arg,guint id) {
GstQueue *queue;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_QUEUE(object));
queue = GST_QUEUE(object);
switch (id) {
case ARG_LEVEL:
GTK_VALUE_INT(*arg) = queue->level_buffers;
break;
case ARG_MAX_LEVEL:
GTK_VALUE_INT(*arg) = queue->max_buffers;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}