2000-12-29 05:38:06 +00:00
|
|
|
/* GStreamer
|
|
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
|
|
*
|
|
|
|
* gstpipefilter.c:
|
2000-05-28 20:04:31 +00:00
|
|
|
*
|
|
|
|
* 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 <stdio.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <errno.h>
|
|
|
|
|
|
|
|
//#define DEBUG_ENABLED
|
|
|
|
#include "gstpipefilter.h"
|
|
|
|
|
|
|
|
|
|
|
|
GstElementDetails gst_pipefilter_details = {
|
|
|
|
"Pipefilter",
|
|
|
|
"Filter",
|
|
|
|
"Pass data without modification",
|
|
|
|
VERSION,
|
2001-05-24 00:46:45 +00:00
|
|
|
"Erik Walthinsen <omega@cse.ogi.edu>\n"
|
|
|
|
"Wim Taymans <wim.taymans@chello.be>",
|
2000-05-28 20:04:31 +00:00
|
|
|
"(C) 1999",
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* Pipefilter signals and args */
|
|
|
|
enum {
|
|
|
|
/* FILL ME */
|
|
|
|
LAST_SIGNAL
|
|
|
|
};
|
|
|
|
|
|
|
|
enum {
|
|
|
|
ARG_0,
|
2000-05-28 22:46:46 +00:00
|
|
|
ARG_COMMAND
|
2000-05-28 20:04:31 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static void gst_pipefilter_class_init (GstPipefilterClass *klass);
|
|
|
|
static void gst_pipefilter_init (GstPipefilter *pipefilter);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static void gst_pipefilter_set_arg (GtkObject *object, GtkArg *arg, guint id);
|
|
|
|
static void gst_pipefilter_get_arg (GtkObject *object, GtkArg *arg, guint id);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static GstBuffer* gst_pipefilter_get (GstPad *pad);
|
|
|
|
static void gst_pipefilter_chain (GstPad *pad, GstBuffer *buf);
|
|
|
|
static gboolean gst_pipefilter_handle_eos (GstPad *pad);
|
|
|
|
|
|
|
|
static GstElementStateReturn gst_pipefilter_change_state (GstElement *element);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
2000-12-29 02:28:04 +00:00
|
|
|
static GstElementClass *parent_class = NULL;
|
2000-05-28 20:04:31 +00:00
|
|
|
//static guint gst_pipefilter_signals[LAST_SIGNAL] = { 0 };
|
|
|
|
|
|
|
|
GtkType
|
2001-05-24 00:46:45 +00:00
|
|
|
gst_pipefilter_get_type (void)
|
|
|
|
{
|
2000-05-28 20:04:31 +00:00
|
|
|
static GtkType pipefilter_type = 0;
|
|
|
|
|
|
|
|
if (!pipefilter_type) {
|
|
|
|
static const GtkTypeInfo pipefilter_info = {
|
|
|
|
"GstPipefilter",
|
|
|
|
sizeof(GstPipefilter),
|
|
|
|
sizeof(GstPipefilterClass),
|
|
|
|
(GtkClassInitFunc)gst_pipefilter_class_init,
|
|
|
|
(GtkObjectInitFunc)gst_pipefilter_init,
|
|
|
|
(GtkArgSetFunc)gst_pipefilter_set_arg,
|
|
|
|
(GtkArgGetFunc)gst_pipefilter_get_arg,
|
|
|
|
(GtkClassInitFunc)NULL,
|
|
|
|
};
|
2000-12-29 02:28:04 +00:00
|
|
|
pipefilter_type = gtk_type_unique(GST_TYPE_ELEMENT,&pipefilter_info);
|
2000-05-28 20:04:31 +00:00
|
|
|
}
|
|
|
|
return pipefilter_type;
|
|
|
|
}
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static void
|
|
|
|
gst_pipefilter_class_init (GstPipefilterClass *klass)
|
|
|
|
{
|
2000-05-28 20:04:31 +00:00
|
|
|
GtkObjectClass *gtkobject_class;
|
|
|
|
GstElementClass *gstelement_class;
|
|
|
|
|
|
|
|
gtkobject_class = (GtkObjectClass*)klass;
|
|
|
|
gstelement_class = (GstElementClass*)klass;
|
|
|
|
|
2000-12-29 02:28:04 +00:00
|
|
|
parent_class = gtk_type_class(GST_TYPE_ELEMENT);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
|
|
|
gstelement_class->change_state = gst_pipefilter_change_state;
|
|
|
|
|
2000-05-28 22:46:46 +00:00
|
|
|
gtk_object_add_arg_type("GstPipefilter::command", GTK_TYPE_STRING,
|
|
|
|
GTK_ARG_READWRITE, ARG_COMMAND);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
2000-05-28 22:46:46 +00:00
|
|
|
gtkobject_class->set_arg = gst_pipefilter_set_arg;
|
|
|
|
gtkobject_class->get_arg = gst_pipefilter_get_arg;
|
2000-05-28 20:04:31 +00:00
|
|
|
}
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static void
|
|
|
|
gst_pipefilter_init (GstPipefilter *pipefilter)
|
|
|
|
{
|
|
|
|
GST_FLAG_SET (pipefilter, GST_ELEMENT_DECOUPLED);
|
|
|
|
|
|
|
|
pipefilter->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
|
|
|
|
gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->sinkpad);
|
|
|
|
gst_pad_set_chain_function (pipefilter->sinkpad, gst_pipefilter_chain);
|
|
|
|
gst_pad_set_eos_function (pipefilter->sinkpad, gst_pipefilter_handle_eos);
|
|
|
|
|
|
|
|
pipefilter->srcpad = gst_pad_new ("src", GST_PAD_SRC);
|
|
|
|
gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->srcpad);
|
|
|
|
gst_pad_set_get_function (pipefilter->srcpad, gst_pipefilter_get);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
2000-05-28 22:46:46 +00:00
|
|
|
pipefilter->command = NULL;
|
2000-05-28 20:04:31 +00:00
|
|
|
pipefilter->curoffset = 0;
|
|
|
|
pipefilter->bytes_per_read = 4096;
|
|
|
|
pipefilter->seq = 0;
|
|
|
|
}
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static gboolean
|
|
|
|
gst_pipefilter_handle_eos (GstPad *pad)
|
|
|
|
{
|
|
|
|
GstPipefilter *pipefilter;
|
|
|
|
|
|
|
|
pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
|
|
|
|
|
|
|
|
GST_DEBUG (0,"pipefilter: %s received eos\n", GST_ELEMENT_NAME (pipefilter));
|
|
|
|
if (close (pipefilter->fdin[1]) < 0)
|
|
|
|
perror("close");
|
|
|
|
if (close (pipefilter->fdout[0]) < 0)
|
|
|
|
perror("close");
|
|
|
|
|
|
|
|
GST_FLAG_SET (pad, GST_PAD_EOS);
|
|
|
|
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static GstBuffer*
|
|
|
|
gst_pipefilter_get (GstPad *pad)
|
|
|
|
{
|
|
|
|
GstPipefilter *pipefilter;
|
2000-06-11 12:11:41 +00:00
|
|
|
GstBuffer *newbuf;
|
|
|
|
glong readbytes;
|
2000-05-28 20:04:31 +00:00
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
|
|
|
|
|
2000-05-28 20:04:31 +00:00
|
|
|
/* create the buffer */
|
|
|
|
// FIXME: should eventually use a bufferpool for this
|
|
|
|
newbuf = gst_buffer_new();
|
2001-05-24 00:46:45 +00:00
|
|
|
g_return_val_if_fail(newbuf, NULL);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
|
|
|
/* allocate the space for the buffer data */
|
|
|
|
GST_BUFFER_DATA(newbuf) = g_malloc(pipefilter->bytes_per_read);
|
2001-05-24 00:46:45 +00:00
|
|
|
g_return_val_if_fail(GST_BUFFER_DATA(newbuf) != NULL, NULL);
|
2000-05-28 20:04:31 +00:00
|
|
|
|
|
|
|
/* read it in from the file */
|
2001-01-01 03:14:40 +00:00
|
|
|
GST_DEBUG (0,"attemting to read %ld bytes\n", pipefilter->bytes_per_read);
|
2001-05-24 00:46:45 +00:00
|
|
|
readbytes = read(pipefilter->fdout[0], GST_BUFFER_DATA(newbuf), pipefilter->bytes_per_read);
|
2001-01-01 03:14:40 +00:00
|
|
|
GST_DEBUG (0,"read %ld bytes\n", readbytes);
|
2000-05-28 20:04:31 +00:00
|
|
|
if (readbytes < 0) {
|
2001-05-24 00:46:45 +00:00
|
|
|
perror("read");
|
|
|
|
gst_element_error(GST_ELEMENT(pipefilter),"reading");
|
|
|
|
return NULL;
|
2000-05-28 20:04:31 +00:00
|
|
|
}
|
2001-05-24 00:46:45 +00:00
|
|
|
/* if we didn't get as many bytes as we asked for, we're at EOF */
|
2000-05-28 20:04:31 +00:00
|
|
|
if (readbytes == 0) {
|
2001-05-24 00:46:45 +00:00
|
|
|
gst_pad_set_eos (pad);
|
|
|
|
return NULL;
|
2000-05-28 20:04:31 +00:00
|
|
|
}
|
2001-05-24 00:46:45 +00:00
|
|
|
|
2000-05-28 20:04:31 +00:00
|
|
|
GST_BUFFER_OFFSET(newbuf) = pipefilter->curoffset;
|
|
|
|
GST_BUFFER_SIZE(newbuf) = readbytes;
|
|
|
|
pipefilter->curoffset += readbytes;
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
return newbuf;
|
2000-06-11 12:11:41 +00:00
|
|
|
}
|
2001-05-24 00:46:45 +00:00
|
|
|
|
|
|
|
static void
|
|
|
|
gst_pipefilter_chain (GstPad *pad,GstBuffer *buf)
|
|
|
|
{
|
2000-06-11 12:11:41 +00:00
|
|
|
GstPipefilter *pipefilter;
|
|
|
|
glong writebytes;
|
|
|
|
guchar *data;
|
|
|
|
gulong size;
|
|
|
|
|
|
|
|
g_return_if_fail(pad != NULL);
|
|
|
|
g_return_if_fail(GST_IS_PAD(pad));
|
|
|
|
g_return_if_fail(buf != NULL);
|
|
|
|
|
2001-01-29 00:06:02 +00:00
|
|
|
pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
|
2000-06-11 12:11:41 +00:00
|
|
|
|
|
|
|
data = GST_BUFFER_DATA(buf);
|
|
|
|
size = GST_BUFFER_SIZE(buf);
|
|
|
|
|
2001-01-01 03:14:40 +00:00
|
|
|
GST_DEBUG (0,"attemting to write %ld bytes\n", size);
|
2000-06-11 12:11:41 +00:00
|
|
|
writebytes = write(pipefilter->fdin[1],data,size);
|
2001-01-01 03:14:40 +00:00
|
|
|
GST_DEBUG (0,"written %ld bytes\n", writebytes);
|
2000-06-11 12:11:41 +00:00
|
|
|
if (writebytes < 0) {
|
|
|
|
perror("write");
|
|
|
|
gst_element_error(GST_ELEMENT(pipefilter),"writing");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
gst_buffer_unref(buf);
|
2000-05-28 20:04:31 +00:00
|
|
|
}
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static void
|
|
|
|
gst_pipefilter_set_arg (GtkObject *object,GtkArg *arg,guint id)
|
|
|
|
{
|
2000-05-28 20:04:31 +00:00
|
|
|
GstPipefilter *pipefilter;
|
|
|
|
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
|
|
g_return_if_fail(GST_IS_PIPEFILTER(object));
|
|
|
|
pipefilter = GST_PIPEFILTER(object);
|
|
|
|
|
|
|
|
switch(id) {
|
2000-05-28 22:46:46 +00:00
|
|
|
case ARG_COMMAND:
|
|
|
|
pipefilter->orig_command = g_strdup(GTK_VALUE_STRING(*arg));
|
|
|
|
pipefilter->command = g_strsplit(GTK_VALUE_STRING(*arg), " ", 0);
|
2000-05-28 20:04:31 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static void
|
|
|
|
gst_pipefilter_get_arg (GtkObject *object,GtkArg *arg,guint id)
|
|
|
|
{
|
2000-05-28 20:04:31 +00:00
|
|
|
GstPipefilter *pipefilter;
|
|
|
|
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
|
|
g_return_if_fail(GST_IS_PIPEFILTER(object));
|
|
|
|
pipefilter = GST_PIPEFILTER(object);
|
|
|
|
|
|
|
|
switch (id) {
|
2000-05-28 22:46:46 +00:00
|
|
|
case ARG_COMMAND:
|
|
|
|
GTK_VALUE_STRING(*arg) = pipefilter->orig_command;
|
2000-05-28 20:04:31 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
arg->type = GTK_TYPE_INVALID;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* open the file, necessary to go to RUNNING state */
|
2001-05-24 00:46:45 +00:00
|
|
|
static gboolean
|
|
|
|
gst_pipefilter_open_file (GstPipefilter *src)
|
|
|
|
{
|
2000-05-28 20:04:31 +00:00
|
|
|
g_return_val_if_fail(!GST_FLAG_IS_SET(src,GST_PIPEFILTER_OPEN), FALSE);
|
|
|
|
|
|
|
|
pipe(src->fdin);
|
|
|
|
pipe(src->fdout);
|
|
|
|
|
|
|
|
if((src->childpid = fork()) == -1)
|
|
|
|
{
|
|
|
|
perror("fork");
|
|
|
|
gst_element_error(GST_ELEMENT(src),"forking");
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(src->childpid == 0)
|
|
|
|
{
|
2001-05-24 00:46:45 +00:00
|
|
|
close(src->fdin[1]);
|
|
|
|
close(src->fdout[0]);
|
2000-05-28 22:46:46 +00:00
|
|
|
// child
|
|
|
|
dup2(src->fdin[0], STDIN_FILENO); /* set the childs input stream */
|
|
|
|
dup2(src->fdout[1], STDOUT_FILENO); /* set the childs output stream */
|
|
|
|
execvp(src->command[0], &src->command[0]);
|
|
|
|
// will only reach if error
|
|
|
|
perror("exec");
|
|
|
|
gst_element_error(GST_ELEMENT(src),"starting child process");
|
|
|
|
return FALSE;
|
|
|
|
|
2000-05-28 20:04:31 +00:00
|
|
|
}
|
2001-05-24 00:46:45 +00:00
|
|
|
else {
|
|
|
|
close(src->fdin[0]);
|
|
|
|
close(src->fdout[1]);
|
|
|
|
}
|
2000-05-28 20:04:31 +00:00
|
|
|
|
|
|
|
GST_FLAG_SET(src,GST_PIPEFILTER_OPEN);
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* close the file */
|
2001-05-24 00:46:45 +00:00
|
|
|
static void
|
|
|
|
gst_pipefilter_close_file (GstPipefilter *src)
|
|
|
|
{
|
2000-05-28 20:04:31 +00:00
|
|
|
g_return_if_fail(GST_FLAG_IS_SET(src,GST_PIPEFILTER_OPEN));
|
|
|
|
|
|
|
|
/* close the file */
|
|
|
|
close(src->fdout[0]);
|
|
|
|
close(src->fdout[1]);
|
|
|
|
close(src->fdin[0]);
|
|
|
|
close(src->fdin[1]);
|
|
|
|
|
|
|
|
/* zero out a lot of our state */
|
|
|
|
src->curoffset = 0;
|
|
|
|
src->seq = 0;
|
|
|
|
|
|
|
|
GST_FLAG_UNSET(src,GST_PIPEFILTER_OPEN);
|
|
|
|
}
|
|
|
|
|
2001-05-24 00:46:45 +00:00
|
|
|
static GstElementStateReturn
|
|
|
|
gst_pipefilter_change_state (GstElement *element)
|
|
|
|
{
|
2000-05-28 20:04:31 +00:00
|
|
|
g_return_val_if_fail(GST_IS_PIPEFILTER(element), FALSE);
|
|
|
|
|
2000-07-21 03:57:51 +00:00
|
|
|
/* if going down into NULL state, close the file if it's open */
|
|
|
|
if (GST_STATE_PENDING(element) == GST_STATE_NULL) {
|
|
|
|
if (GST_FLAG_IS_SET(element,GST_PIPEFILTER_OPEN))
|
2000-05-28 20:04:31 +00:00
|
|
|
gst_pipefilter_close_file(GST_PIPEFILTER(element));
|
2000-07-21 03:57:51 +00:00
|
|
|
/* otherwise (READY or higher) we need to open the file */
|
|
|
|
} else {
|
|
|
|
if (!GST_FLAG_IS_SET(element,GST_PIPEFILTER_OPEN)) {
|
2000-08-14 10:55:35 +00:00
|
|
|
if (!gst_pipefilter_open_file(GST_PIPEFILTER(element)))
|
2000-07-21 03:57:51 +00:00
|
|
|
return GST_STATE_FAILURE;
|
|
|
|
}
|
|
|
|
}
|
2000-05-28 20:04:31 +00:00
|
|
|
|
|
|
|
if (GST_ELEMENT_CLASS(parent_class)->change_state)
|
2000-07-21 03:57:51 +00:00
|
|
|
return GST_ELEMENT_CLASS(parent_class)->change_state(element);
|
2000-08-14 10:55:35 +00:00
|
|
|
return GST_STATE_SUCCESS;
|
2000-05-28 20:04:31 +00:00
|
|
|
}
|