gstreamer/gst/elements/gsthttpsrc.c

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/* 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <gsthttpsrc.h>
GstElementDetails gst_httpsrc_details = {
"HTTP Source",
"Source/Network",
"Read data from an HTTP stream",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
static void gst_httpsrc_push(GstSrc *src);
static gboolean gst_httpsrc_open_url(GstHttpSrc *src);
static void gst_httpsrc_close_url(GstHttpSrc *src);
static gboolean gst_httpsrc_change_state(GstElement *element,
GstElementState state);
/* HttpSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LOCATION,
ARG_BYTESPERREAD,
ARG_OFFSET
};
static void gst_httpsrc_class_init(GstHttpSrcClass *klass);
static void gst_httpsrc_init(GstHttpSrc *httpsrc);
static void gst_httpsrc_set_arg(GtkObject *object,GtkArg *arg,guint id);
static void gst_httpsrc_get_arg(GtkObject *object,GtkArg *arg,guint id);
static GstSrcClass *parent_class = NULL;
//static guint gst_httpsrc_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_httpsrc_get_type(void) {
static GtkType httpsrc_type = 0;
if (!httpsrc_type) {
static const GtkTypeInfo httpsrc_info = {
"GstHttpSrc",
sizeof(GstHttpSrc),
sizeof(GstHttpSrcClass),
(GtkClassInitFunc)gst_httpsrc_class_init,
(GtkObjectInitFunc)gst_httpsrc_init,
(GtkArgSetFunc)gst_httpsrc_set_arg,
(GtkArgGetFunc)gst_httpsrc_get_arg,
(GtkClassInitFunc)NULL,
};
httpsrc_type = gtk_type_unique(GST_TYPE_SRC,&httpsrc_info);
}
return httpsrc_type;
}
static void
gst_httpsrc_class_init(GstHttpSrcClass *klass) {
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
GstSrcClass *gstsrc_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
gstsrc_class = (GstSrcClass*)klass;
parent_class = gtk_type_class(GST_TYPE_SRC);
gtk_object_add_arg_type("GstHttpSrc::location", GTK_TYPE_STRING,
GTK_ARG_READWRITE, ARG_LOCATION);
gtk_object_add_arg_type("GstHttpSrc::bytesperread", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_BYTESPERREAD);
gtkobject_class->set_arg = gst_httpsrc_set_arg;
gtkobject_class->get_arg = gst_httpsrc_get_arg;
gstelement_class->change_state = gst_httpsrc_change_state;
gstsrc_class->push = gst_httpsrc_push;
gstsrc_class->push_region = NULL;
}
static void gst_httpsrc_init(GstHttpSrc *httpsrc) {
httpsrc->srcpad = gst_pad_new("src",GST_PAD_SRC);
gst_element_add_pad(GST_ELEMENT(httpsrc),httpsrc->srcpad);
httpsrc->url = NULL;
httpsrc->request = NULL;
httpsrc->fd = 0;
httpsrc->curoffset = 0;
httpsrc->bytes_per_read = 4096;
}
static void gst_httpsrc_push(GstSrc *src) {
GstHttpSrc *httpsrc;
GstBuffer *buf;
glong readbytes;
g_return_if_fail(src != NULL);
g_return_if_fail(GST_IS_HTTPSRC(src));
// g_return_if_fail(GST_FLAG_IS_SET(src,GST_));
httpsrc = GST_HTTPSRC(src);
buf = gst_buffer_new();
GST_BUFFER_DATA(buf) = (gpointer)malloc(httpsrc->bytes_per_read);
readbytes = read(httpsrc->fd,GST_BUFFER_DATA(buf),httpsrc->bytes_per_read);
if (readbytes == 0) {
gst_src_signal_eos(GST_SRC(httpsrc));
return;
}
if (readbytes < httpsrc->bytes_per_read) {
// FIXME: set the buffer's EOF bit here
}
GST_BUFFER_OFFSET(buf) = httpsrc->curoffset;
GST_BUFFER_SIZE(buf) = readbytes;
httpsrc->curoffset += readbytes;
gst_pad_push(httpsrc->srcpad,buf);
}
static gboolean gst_httpsrc_open_url(GstHttpSrc *httpsrc) {
gint status;
g_return_val_if_fail(httpsrc != NULL, FALSE);
g_return_val_if_fail(GST_IS_HTTPSRC(httpsrc), FALSE);
g_return_val_if_fail(httpsrc->url != NULL, FALSE);
httpsrc->request = ghttp_request_new();
ghttp_set_uri(httpsrc->request,httpsrc->url);
ghttp_set_sync(httpsrc->request,ghttp_async);
ghttp_set_header(httpsrc->request,"User-Agent","GstHttpSrc");
ghttp_prepare(httpsrc->request);
/* process everything up to the actual data stream */
/* FIXME: should be in preroll, but hey */
status = 0;
while ((ghttp_get_status(httpsrc->request).proc != ghttp_proc_response)
&& (status >= 0)) {
status = ghttp_process(httpsrc->request);
}
/* get the fd so we can read data ourselves */
httpsrc->fd = ghttp_get_socket(httpsrc->request);
return TRUE;
}
/* unmap and close the file */
static void gst_httpsrc_close_url(GstHttpSrc *src) {
g_return_if_fail(src->fd > 0);
close(src->fd);
src->fd = 0;
}
static void gst_httpsrc_set_arg(GtkObject *object,GtkArg *arg,guint id) {
GstHttpSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_HTTPSRC(object));
src = GST_HTTPSRC(object);
switch(id) {
case ARG_LOCATION:
/* the element must be stopped in order to do this */
g_return_if_fail(!GST_FLAG_IS_SET(src,GST_STATE_RUNNING));
if (src->url) g_free(src->url);
/* clear the url if we get a NULL (is that possible?) */
if (GTK_VALUE_STRING(*arg) == NULL) {
src->url = NULL;
gst_element_set_state(GST_ELEMENT(object),~GST_STATE_COMPLETE);
/* otherwise set the new url */
} else {
src->url = g_strdup(GTK_VALUE_STRING(*arg));
gst_element_set_state(GST_ELEMENT(object),GST_STATE_COMPLETE);
}
break;
case ARG_BYTESPERREAD:
src->bytes_per_read = GTK_VALUE_INT(*arg);
break;
default:
break;
}
}
static void gst_httpsrc_get_arg(GtkObject *object,GtkArg *arg,guint id) {
GstHttpSrc *httpsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_HTTPSRC(object));
httpsrc = GST_HTTPSRC(object);
switch (id) {
case ARG_LOCATION:
GTK_VALUE_STRING(*arg) = httpsrc->url;
break;
case ARG_BYTESPERREAD:
GTK_VALUE_INT(*arg) = httpsrc->bytes_per_read;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static gboolean gst_httpsrc_change_state(GstElement *element,
GstElementState state) {
g_return_val_if_fail(GST_IS_HTTPSRC(element), FALSE);
switch (state) {
case GST_STATE_RUNNING:
if (!gst_httpsrc_open_url(GST_HTTPSRC(element)))
return FALSE;
break;
case ~GST_STATE_RUNNING:
gst_httpsrc_close_url(GST_HTTPSRC(element));
break;
default:
break;
}
if (GST_ELEMENT_CLASS(parent_class)->change_state)
return GST_ELEMENT_CLASS(parent_class)->change_state(element,state);
return TRUE;
}