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7fb1f1901f
Original commit message from CVS: * gst/autoplug/gstspideridentity.c: (gst_spider_identity_request_new_pad): * gst/elements/gstaggregator.c: (gst_aggregator_base_init), (gst_aggregator_init): * gst/elements/gstfakesink.c: (gst_fakesink_base_init), (gst_fakesink_init): * gst/elements/gstfakesrc.c: (gst_fakesrc_base_init), (gst_fakesrc_init): * gst/elements/gstfdsink.c: (gst_fdsink_base_init), (gst_fdsink_init): * gst/elements/gstfdsrc.c: (gst_fdsrc_base_init), (gst_fdsrc_init): * gst/elements/gstfilesink.c: (gst_filesink_base_init), (gst_filesink_init): * gst/elements/gstfilesrc.c: (gst_filesrc_base_init), (gst_filesrc_init): * gst/elements/gstidentity.c: (gst_identity_base_init), (gst_identity_init): * gst/elements/gstmultifilesrc.c: (gst_multifilesrc_base_init), (gst_multifilesrc_init): * gst/elements/gstpipefilter.c: (gst_pipefilter_base_init), (gst_pipefilter_init): * gst/elements/gststatistics.c: (gst_statistics_base_init), (gst_statistics_init): * gst/elements/gsttee.c: (gst_tee_base_init), (gst_tee_init): * gst/gstqueue.c: (gst_queue_base_init), (gst_queue_init): s/gst_pad_new/&_from_template/ register pad templates in the base_init function add static pad template definitions
356 lines
10 KiB
C
356 lines
10 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstpipefilter.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "../gst-i18n-lib.h"
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#include "gstpipefilter.h"
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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GST_DEBUG_CATEGORY_STATIC (gst_pipefilter_debug);
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#define GST_CAT_DEFAULT gst_pipefilter_debug
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GstElementDetails gst_pipefilter_details = GST_ELEMENT_DETAILS ("Pipefilter",
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"Filter",
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"Interoperate with an external program using stdin and stdout",
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"Erik Walthinsen <omega@cse.ogi.edu>, "
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"Wim Taymans <wim.taymans@chello.be>");
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/* Pipefilter signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_COMMAND
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};
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#define _do_init(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_pipefilter_debug, "pipefilter", 0, "pipefilter element");
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GST_BOILERPLATE_FULL (GstPipefilter, gst_pipefilter, GstElement,
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GST_TYPE_ELEMENT, _do_init);
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static void gst_pipefilter_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_pipefilter_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstData *gst_pipefilter_get (GstPad * pad);
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static void gst_pipefilter_chain (GstPad * pad, GstData * _data);
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static gboolean gst_pipefilter_handle_event (GstPad * pad, GstEvent * event);
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static GstElementStateReturn gst_pipefilter_change_state (GstElement * element);
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static void
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gst_pipefilter_base_init (gpointer g_class)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&srctemplate));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_details (gstelement_class, &gst_pipefilter_details);
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}
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static void
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gst_pipefilter_class_init (GstPipefilterClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gobject_class->set_property = gst_pipefilter_set_property;
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gobject_class->get_property = gst_pipefilter_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_COMMAND, g_param_spec_string ("command", "command", "command", NULL, G_PARAM_READWRITE)); /* CHECKME */
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gstelement_class->change_state = gst_pipefilter_change_state;
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}
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static void
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gst_pipefilter_init (GstPipefilter * pipefilter)
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{
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GST_FLAG_SET (pipefilter, GST_ELEMENT_DECOUPLED);
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pipefilter->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get (&sinktemplate),
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"sink");
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gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->sinkpad);
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gst_pad_set_chain_function (pipefilter->sinkpad, gst_pipefilter_chain);
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pipefilter->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get (&srctemplate),
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"src");
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gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->srcpad);
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gst_pad_set_get_function (pipefilter->srcpad, gst_pipefilter_get);
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pipefilter->command = NULL;
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pipefilter->curoffset = 0;
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pipefilter->bytes_per_read = 4096;
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pipefilter->seq = 0;
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}
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static gboolean
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gst_pipefilter_handle_event (GstPad * pad, GstEvent * event)
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{
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GstPipefilter *pipefilter;
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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GST_DEBUG ("pipefilter: %s received event", GST_ELEMENT_NAME (pipefilter));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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if (close (pipefilter->fdin[1]) < 0)
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perror ("close");
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if (close (pipefilter->fdout[0]) < 0)
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perror ("close");
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break;
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default:
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break;
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}
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gst_pad_event_default (pad, event);
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return TRUE;
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}
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static GstData *
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gst_pipefilter_get (GstPad * pad)
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{
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GstPipefilter *pipefilter;
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GstBuffer *newbuf;
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glong readbytes;
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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/* create the buffer */
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/* FIXME: should eventually use a bufferpool for this */
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newbuf = gst_buffer_new ();
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g_return_val_if_fail (newbuf, NULL);
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/* allocate the space for the buffer data */
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GST_BUFFER_DATA (newbuf) = g_malloc (pipefilter->bytes_per_read);
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g_return_val_if_fail (GST_BUFFER_DATA (newbuf) != NULL, NULL);
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/* read it in from the file */
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GST_DEBUG ("attemting to read %ld bytes", pipefilter->bytes_per_read);
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readbytes =
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read (pipefilter->fdout[0], GST_BUFFER_DATA (newbuf),
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pipefilter->bytes_per_read);
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GST_DEBUG ("read %ld bytes", readbytes);
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if (readbytes < 0) {
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GST_ELEMENT_ERROR (pipefilter, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
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return NULL;
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}
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/* if we didn't get as many bytes as we asked for, we're at EOF */
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if (readbytes == 0) {
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return GST_DATA (gst_event_new (GST_EVENT_EOS));
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}
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GST_BUFFER_OFFSET (newbuf) = pipefilter->curoffset;
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GST_BUFFER_SIZE (newbuf) = readbytes;
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pipefilter->curoffset += readbytes;
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return GST_DATA (newbuf);
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}
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static void
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gst_pipefilter_chain (GstPad * pad, GstData * _data)
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{
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GstBuffer *buf;
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GstPipefilter *pipefilter;
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glong writebytes;
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guchar *data;
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gulong size;
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g_return_if_fail (pad != NULL);
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g_return_if_fail (GST_IS_PAD (pad));
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if (GST_IS_EVENT (_data)) {
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gst_pipefilter_handle_event (pad, GST_EVENT (_data));
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return;
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}
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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buf = GST_BUFFER (_data);
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data = GST_BUFFER_DATA (buf);
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size = GST_BUFFER_SIZE (buf);
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GST_DEBUG ("attemting to write %ld bytes", size);
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writebytes = write (pipefilter->fdin[1], data, size);
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GST_DEBUG ("written %ld bytes", writebytes);
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if (writebytes < 0) {
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GST_ELEMENT_ERROR (pipefilter, RESOURCE, WRITE, (NULL), GST_ERROR_SYSTEM);
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return;
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}
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gst_buffer_unref (buf);
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}
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static void
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gst_pipefilter_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstPipefilter *pipefilter;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_PIPEFILTER (object));
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pipefilter = GST_PIPEFILTER (object);
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switch (prop_id) {
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case ARG_COMMAND:
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pipefilter->orig_command = g_strdup (g_value_get_string (value));
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pipefilter->command = g_strsplit (g_value_get_string (value), " ", 0);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_pipefilter_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstPipefilter *pipefilter;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_PIPEFILTER (object));
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pipefilter = GST_PIPEFILTER (object);
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switch (prop_id) {
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case ARG_COMMAND:
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g_value_set_string (value, pipefilter->orig_command);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* open the file, necessary to go to RUNNING state */
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static gboolean
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gst_pipefilter_open_file (GstPipefilter * src)
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{
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g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_PIPEFILTER_OPEN), FALSE);
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pipe (src->fdin);
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pipe (src->fdout);
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if ((src->childpid = fork ()) == -1) {
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GST_ELEMENT_ERROR (src, RESOURCE, TOO_LAZY, (NULL), GST_ERROR_SYSTEM);
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return FALSE;
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}
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if (src->childpid == 0) {
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close (src->fdin[1]);
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close (src->fdout[0]);
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/* child */
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dup2 (src->fdin[0], STDIN_FILENO); /* set the childs input stream */
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dup2 (src->fdout[1], STDOUT_FILENO); /* set the childs output stream */
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execvp (src->command[0], &src->command[0]);
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/* will only be reached if execvp has an error */
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GST_ELEMENT_ERROR (src, RESOURCE, TOO_LAZY, (NULL), GST_ERROR_SYSTEM);
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return FALSE;
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} else {
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close (src->fdin[0]);
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close (src->fdout[1]);
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}
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GST_FLAG_SET (src, GST_PIPEFILTER_OPEN);
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return TRUE;
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}
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/* close the file */
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static void
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gst_pipefilter_close_file (GstPipefilter * src)
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{
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g_return_if_fail (GST_FLAG_IS_SET (src, GST_PIPEFILTER_OPEN));
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/* close the file */
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close (src->fdout[0]);
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close (src->fdout[1]);
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close (src->fdin[0]);
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close (src->fdin[1]);
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/* zero out a lot of our state */
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src->curoffset = 0;
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src->seq = 0;
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GST_FLAG_UNSET (src, GST_PIPEFILTER_OPEN);
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}
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static GstElementStateReturn
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gst_pipefilter_change_state (GstElement * element)
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{
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g_return_val_if_fail (GST_IS_PIPEFILTER (element), FALSE);
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/* if going down into NULL state, close the file if it's open */
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if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
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if (GST_FLAG_IS_SET (element, GST_PIPEFILTER_OPEN))
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gst_pipefilter_close_file (GST_PIPEFILTER (element));
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/* otherwise (READY or higher) we need to open the file */
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} else {
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if (!GST_FLAG_IS_SET (element, GST_PIPEFILTER_OPEN)) {
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if (!gst_pipefilter_open_file (GST_PIPEFILTER (element)))
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return GST_STATE_FAILURE;
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}
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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return GST_ELEMENT_CLASS (parent_class)->change_state (element);
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return GST_STATE_SUCCESS;
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}
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