gstreamer/gst-libs/gst/app/gstappsrc.c
David Schleef 5b4cc95fea gst-libs/gst/app/: Add GstAppBuffer that includes a callback and closure for proper handling of data chunks.
Original commit message from CVS:
* gst-libs/gst/app/Makefile.am:
* gst-libs/gst/app/gstappbuffer.c:
* gst-libs/gst/app/gstappbuffer.h:
* gst-libs/gst/app/gstappsrc.c:
Add GstAppBuffer that includes a callback and closure for
proper handling of data chunks.
2007-03-03 10:10:30 +00:00

319 lines
7.3 KiB
C

/* GStreamer
* Copyright (C) 2007 David Schleef <ds@schleef.org>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstpushsrc.h>
#include <string.h>
#include "gstappsrc.h"
GST_DEBUG_CATEGORY (app_src_debug);
#define GST_CAT_DEFAULT app_src_debug
static const GstElementDetails app_src_details = GST_ELEMENT_DETAILS ("AppSrc",
"FIXME",
"FIXME",
"autogenerated by makefilter");
enum
{
PROP_0
};
static GstStaticPadTemplate gst_app_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void gst_app_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_app_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_app_src_dispose (GObject * object);
static GstFlowReturn gst_app_src_create (GstPushSrc * psrc, GstBuffer ** buf);
static gboolean gst_app_src_start (GstBaseSrc * psrc);
static gboolean gst_app_src_stop (GstBaseSrc * psrc);
static gboolean gst_app_src_unlock (GstBaseSrc * psrc);
GST_BOILERPLATE (GstAppSrc, gst_app_src, GstPushSrc, GST_TYPE_PUSH_SRC);
static void
gst_app_src_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
//GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GST_DEBUG_CATEGORY_INIT (app_src_debug, "appsrc", 0, "appsrc element");
gst_element_class_set_details (element_class, &app_src_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_app_src_template));
}
static void
gst_app_src_class_init (GstAppSrcClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstPushSrcClass *pushsrc_class = (GstPushSrcClass *) klass;
GstBaseSrcClass *basesrc_class = (GstBaseSrcClass *) klass;
gobject_class->set_property = gst_app_src_set_property;
gobject_class->get_property = gst_app_src_get_property;
gobject_class->dispose = gst_app_src_dispose;
pushsrc_class->create = gst_app_src_create;
basesrc_class->start = gst_app_src_start;
basesrc_class->stop = gst_app_src_stop;
basesrc_class->unlock = gst_app_src_unlock;
}
static void
gst_app_src_dispose (GObject * obj)
{
GstAppSrc *appsrc = GST_APP_SRC (obj);
if (appsrc->caps) {
gst_caps_unref (appsrc->caps);
appsrc->caps = NULL;
}
if (appsrc->mutex) {
g_mutex_free (appsrc->mutex);
appsrc->mutex = NULL;
}
if (appsrc->cond) {
g_cond_free (appsrc->cond);
appsrc->cond = NULL;
}
if (appsrc->queue) {
g_queue_free (appsrc->queue);
appsrc->queue = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
gst_app_src_init (GstAppSrc * appsrc, GstAppSrcClass * klass)
{
appsrc->mutex = g_mutex_new ();
appsrc->cond = g_cond_new ();
appsrc->queue = g_queue_new ();
}
static void
gst_app_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAppSrc *appsrc = GST_APP_SRC (object);
GST_OBJECT_LOCK (appsrc);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (appsrc);
}
static void
gst_app_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAppSrc *appsrc = GST_APP_SRC (object);
GST_OBJECT_LOCK (appsrc);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (appsrc);
}
static gboolean
gst_app_src_start (GstBaseSrc * psrc)
{
GstAppSrc *appsrc = GST_APP_SRC (psrc);
appsrc->unlock = FALSE;
#if 0
/* FIXME: I don't know if this makes sense */
appsrc->end_of_stream = FALSE;
appsrc->flush = FALSE;
#endif
return TRUE;
}
static gboolean
gst_app_src_stop (GstBaseSrc * psrc)
{
//GstAppSrc *appsrc = GST_APP_SRC(psrc);
return TRUE;
}
static gboolean
gst_app_src_unlock (GstBaseSrc * psrc)
{
GstAppSrc *appsrc = GST_APP_SRC (psrc);
appsrc->unlock = TRUE;
g_cond_signal (appsrc->cond);
return TRUE;
}
static GstFlowReturn
gst_app_src_create (GstPushSrc * psrc, GstBuffer ** buf)
{
GstAppSrc *appsrc = GST_APP_SRC (psrc);
int ret = GST_FLOW_ERROR;
g_mutex_lock (appsrc->mutex);
while (1) {
if (appsrc->unlock) {
ret = GST_FLOW_WRONG_STATE;
break;
}
if (!g_queue_is_empty (appsrc->queue)) {
*buf = g_queue_pop_head (appsrc->queue);
gst_buffer_set_caps (*buf, appsrc->caps);
ret = GST_FLOW_OK;
break;
}
if (appsrc->end_of_stream) {
appsrc->end_of_stream = FALSE;
ret = GST_FLOW_UNEXPECTED;
break;
}
if (appsrc->flush) {
appsrc->flush = FALSE;
/* FIXME: I don't really know how to do this */
break;
}
g_cond_wait (appsrc->cond, appsrc->mutex);
}
g_mutex_unlock (appsrc->mutex);
return ret;
}
/* external API */
/**
* gst_app_src_push_buffer:
* @appsrc:
* @buffer:
*
* Adds a buffer to the queue of buffers that the appsrc element will
* push to its source pad. This function takes ownership of the buffer.
*/
void
gst_app_src_push_buffer (GstAppSrc * appsrc, GstBuffer * buffer)
{
g_return_if_fail (appsrc);
g_return_if_fail (GST_IS_APP_SRC (appsrc));
g_mutex_lock (appsrc->mutex);
g_queue_push_tail (appsrc->queue, buffer);
g_cond_signal (appsrc->cond);
g_mutex_unlock (appsrc->mutex);
}
/**
* gst_app_src_set_caps:
* @appsrc:
* @caps:
*
* Set the capabilities on the appsrc element. This function takes
* ownership of the caps structure.
*/
void
gst_app_src_set_caps (GstAppSrc * appsrc, GstCaps * caps)
{
g_return_if_fail (appsrc);
g_return_if_fail (GST_IS_APP_SRC (appsrc));
gst_caps_replace (&appsrc->caps, caps);
}
/**
* gst_app_src_flush:
* @appsrc:
*
* Flushes all queued buffers from the appsrc element.
*/
void
gst_app_src_flush (GstAppSrc * appsrc)
{
GstBuffer *buffer;
g_return_if_fail (appsrc);
g_return_if_fail (GST_IS_APP_SRC (appsrc));
g_mutex_lock (appsrc->mutex);
while ((buffer = g_queue_pop_head (appsrc->queue))) {
gst_buffer_unref (buffer);
}
appsrc->flush = TRUE;
g_cond_signal (appsrc->cond);
g_mutex_unlock (appsrc->mutex);
}
/**
* gst_app_src_end_of_stream:
* @appsrc:
*
* Indicates to the appsrc element that the last buffer queued in the
* element is the last buffer of the stream.
*/
void
gst_app_src_end_of_stream (GstAppSrc * appsrc)
{
g_return_if_fail (appsrc);
g_return_if_fail (GST_IS_APP_SRC (appsrc));
g_mutex_lock (appsrc->mutex);
appsrc->end_of_stream = TRUE;
g_cond_signal (appsrc->cond);
g_mutex_unlock (appsrc->mutex);
}