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Original commit message from CVS: Remove threadsafe properties. Fix elements because GObject complains when installing a property before declaring a set/get_property handler. Rearrange gstelement.h file, use STATE macros for state locks. Free mutexes in the finalize method instead of dispose.
289 lines
7.8 KiB
C
289 lines
7.8 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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* gstfdsrc.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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "gst/gst_private.h"
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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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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdlib.h>
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#include <errno.h>
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#include "gstfdsrc.h"
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#define DEFAULT_BLOCKSIZE 4096
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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_fdsrc_debug);
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#define GST_CAT_DEFAULT gst_fdsrc_debug
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GstElementDetails gst_fdsrc_details = GST_ELEMENT_DETAILS ("Disk Source",
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"Source/File",
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"Synchronous read from a file",
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"Erik Walthinsen <omega@cse.ogi.edu>");
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/* FdSrc signals and args */
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enum
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{
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SIGNAL_TIMEOUT,
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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_FD,
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ARG_BLOCKSIZE,
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ARG_TIMEOUT
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};
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static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };
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#define _do_init(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_fdsrc_debug, "fdsrc", 0, "fdsrc element");
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GST_BOILERPLATE_FULL (GstFdSrc, gst_fdsrc, GstElement, GST_TYPE_ELEMENT,
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_do_init);
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static void gst_fdsrc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_fdsrc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstElementStateReturn gst_fdsrc_change_state (GstElement * element);
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static GstData *gst_fdsrc_get (GstPad * pad);
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static void
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gst_fdsrc_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_set_details (gstelement_class, &gst_fdsrc_details);
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}
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static void
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gst_fdsrc_class_init (GstFdSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->set_property = gst_fdsrc_set_property;
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gobject_class->get_property = gst_fdsrc_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
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g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
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0, G_MAXINT, 0, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
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g_param_spec_ulong ("blocksize", "Block size",
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"Size in bytes to read per buffer", 1, G_MAXULONG, DEFAULT_BLOCKSIZE,
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G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TIMEOUT,
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g_param_spec_uint64 ("timeout", "Timeout", "Read timeout in nanoseconds",
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0, G_MAXUINT64, 0, G_PARAM_READWRITE));
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gst_fdsrc_signals[SIGNAL_TIMEOUT] =
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g_signal_new ("timeout", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstFdSrcClass, timeout), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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gstelement_class->change_state = gst_fdsrc_change_state;
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}
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static void
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gst_fdsrc_init (GstFdSrc * fdsrc)
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{
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fdsrc->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_pad_set_get_function (fdsrc->srcpad, gst_fdsrc_get);
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gst_element_add_pad (GST_ELEMENT (fdsrc), fdsrc->srcpad);
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fdsrc->fd = 0;
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fdsrc->curoffset = 0;
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fdsrc->blocksize = DEFAULT_BLOCKSIZE;
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fdsrc->timeout = 0;
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fdsrc->seq = 0;
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}
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static GstElementStateReturn
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gst_fdsrc_change_state (GstElement * element)
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{
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GstFdSrc *src = GST_FDSRC (element);
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switch (GST_STATE_TRANSITION (element)) {
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case GST_STATE_NULL_TO_READY:
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break;
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case GST_STATE_READY_TO_NULL:
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break;
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case GST_STATE_READY_TO_PAUSED:
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src->curoffset = 0;
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break;
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case GST_STATE_PAUSED_TO_READY:
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break;
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default:
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break;
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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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static void
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gst_fdsrc_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstFdSrc *src;
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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_FDSRC (object));
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src = GST_FDSRC (object);
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switch (prop_id) {
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case ARG_FD:
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src->fd = g_value_get_int (value);
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break;
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case ARG_BLOCKSIZE:
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src->blocksize = g_value_get_ulong (value);
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break;
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case ARG_TIMEOUT:
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src->timeout = g_value_get_uint64 (value);
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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_fdsrc_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstFdSrc *src;
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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_FDSRC (object));
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src = GST_FDSRC (object);
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switch (prop_id) {
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case ARG_BLOCKSIZE:
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g_value_set_ulong (value, src->blocksize);
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break;
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case ARG_FD:
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g_value_set_int (value, src->fd);
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break;
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case ARG_TIMEOUT:
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g_value_set_uint64 (value, src->timeout);
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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 GstData *
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gst_fdsrc_get (GstPad * pad)
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{
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GstFdSrc *src;
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GstBuffer *buf;
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glong readbytes;
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#ifndef HAVE_WIN32
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fd_set readfds;
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struct timeval t, *tp = &t;
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gint retval;
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#endif
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src = GST_FDSRC (gst_pad_get_parent (pad));
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/* create the buffer */
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buf = gst_buffer_new_and_alloc (src->blocksize);
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#ifndef HAVE_WIN32
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FD_ZERO (&readfds);
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FD_SET (src->fd, &readfds);
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if (src->timeout != 0) {
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GST_TIME_TO_TIMEVAL (src->timeout, t);
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} else
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tp = NULL;
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do {
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retval = select (src->fd + 1, &readfds, NULL, NULL, tp);
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} while (retval == -1 && errno == EINTR); /* retry if interrupted */
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if (retval == -1) {
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GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
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("select on file descriptor: %s.", g_strerror (errno)));
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gst_element_set_eos (GST_ELEMENT (src));
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return GST_DATA (gst_event_new (GST_EVENT_EOS));
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} else if (retval == 0) {
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g_signal_emit (G_OBJECT (src), gst_fdsrc_signals[SIGNAL_TIMEOUT], 0);
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gst_element_set_eos (GST_ELEMENT (src));
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return GST_DATA (gst_event_new (GST_EVENT_EOS));
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}
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#endif
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do {
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readbytes = read (src->fd, GST_BUFFER_DATA (buf), src->blocksize);
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} while (readbytes == -1 && errno == EINTR); /* retry if interrupted */
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if (readbytes > 0) {
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GST_BUFFER_OFFSET (buf) = src->curoffset;
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GST_BUFFER_SIZE (buf) = readbytes;
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GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
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src->curoffset += readbytes;
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/* we're done, return the buffer */
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return GST_DATA (buf);
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} else if (readbytes == 0) {
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gst_element_set_eos (GST_ELEMENT (src));
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return GST_DATA (gst_event_new (GST_EVENT_EOS));
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} else {
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GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
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("read on file descriptor: %s.", g_strerror (errno)));
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gst_element_set_eos (GST_ELEMENT (src));
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return GST_DATA (gst_event_new (GST_EVENT_EOS));
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}
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}
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