gst/fdsrc/: Moved fdsrc 0.9 port from gstreamer/gst/elements to here.

Original commit message from CVS:
2005-07-16  Philippe Khalaf <burger@speedy.org>

* gst/fdsrc/gstfdsrc.c:
* gst/fdsrc/gstfdsrc.h:
* gst/fdsrc/Makefile.am:
Moved fdsrc 0.9 port from gstreamer/gst/elements to here.

3 files changed, 384 insertions, 0 deletions

diff --git a/gst/fdsrc/Makefile.am b/gst/fdsrc/Makefile.am
new file mode 100644
index 00000000..611d9bfe
--- /dev/null
+++ b/gst/fdsrc/Makefile.am
@@ -0,0 +1,10 @@
+
+plugin_LTLIBRARIES = libgstfdsrc.la
+
+libgstfdsrc_la_SOURCES = gstfdsrc.c
+libgstfdsrc_la_CFLAGS = $(GST_CFLAGS)
+libgstfdsrc_la_LIBADD = $(GST_LIBS) 
+libgstfdsrc_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(GST_BASE_LIBS)
+
+noinst_HEADERS = gstfdsrc.h
+
diff --git a/gst/fdsrc/gstfdsrc.c b/gst/fdsrc/gstfdsrc.c
new file mode 100644
index 00000000..58f5b241
--- /dev/null
+++ b/gst/fdsrc/gstfdsrc.c
@@ -0,0 +1,301 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ *                    2005 Philippe Khalaf <burger@speedy.org>
+ *
+ * gstfdsrc.c: 
+ *
+ * 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_private.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <errno.h>
+
+#include "gstfdsrc.h"
+
+#define DEFAULT_BLOCKSIZE	4096
+
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+GST_DEBUG_CATEGORY_STATIC (gst_fdsrc_debug);
+#define GST_CAT_DEFAULT gst_fdsrc_debug
+
+GstElementDetails gst_fdsrc_details = GST_ELEMENT_DETAILS ("Disk Source",
+    "Source/File",
+    "Synchronous read from a file",
+    "Erik Walthinsen <omega@cse.ogi.edu>");
+
+
+/* FdSrc signals and args */
+enum
+{
+  SIGNAL_TIMEOUT,
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  ARG_FD,
+  ARG_BLOCKSIZE,
+  ARG_TIMEOUT
+};
+
+static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };
+
+#define _do_init(bla) \
+    GST_DEBUG_CATEGORY_INIT (gst_fdsrc_debug, "fdsrc", 0, "fdsrc element");
+
+GST_BOILERPLATE_FULL (GstFdSrc, gst_fdsrc, GstElement, GST_TYPE_PUSH_SRC,
+    _do_init);
+
+static void gst_fdsrc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_fdsrc_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstElementStateReturn gst_fdsrc_change_state (GstElement * element);
+
+static GstFlowReturn gst_fdsrc_create (GstPushSrc * psrc, GstBuffer ** outbuf);
+
+static void
+gst_fdsrc_base_init (gpointer g_class)
+{
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (gstelement_class,
+      gst_static_pad_template_get (&srctemplate));
+  gst_element_class_set_details (gstelement_class, &gst_fdsrc_details);
+}
+static void
+gst_fdsrc_class_init (GstFdSrcClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstBaseSrcClass *gstbasesrc_class;
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+  GstPushSrcClass *gstpush_src_class;
+
+  gobject_class = G_OBJECT_CLASS (klass);
+  gstbasesrc_class = (GstBaseSrcClass *) klass;
+  gstpush_src_class = (GstPushSrcClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_PUSH_SRC);
+
+  gobject_class->set_property = gst_fdsrc_set_property;
+  gobject_class->get_property = gst_fdsrc_get_property;
+
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
+      g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
+          0, G_MAXINT, 0, G_PARAM_READWRITE));
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
+      g_param_spec_ulong ("blocksize", "Block size",
+          "Size in bytes to read per buffer", 1, G_MAXULONG, DEFAULT_BLOCKSIZE,
+          G_PARAM_READWRITE));
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TIMEOUT,
+      g_param_spec_uint64 ("timeout", "Timeout", "Read timeout in nanoseconds",
+          0, G_MAXUINT64, 0, G_PARAM_READWRITE));
+
+  gst_fdsrc_signals[SIGNAL_TIMEOUT] =
+      g_signal_new ("timeout", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
+      G_STRUCT_OFFSET (GstFdSrcClass, timeout), NULL, NULL,
+      g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+
+  gstelement_class->change_state = gst_fdsrc_change_state;
+
+  gstpush_src_class->create = gst_fdsrc_create;
+
+}
+
+static void
+gst_fdsrc_init (GstFdSrc * fdsrc)
+{
+  // TODO set live only if it's actually a live source
+  gst_base_src_set_live (GST_BASE_SRC (fdsrc), TRUE);
+
+  fdsrc->fd = 0;
+  fdsrc->curoffset = 0;
+  fdsrc->blocksize = DEFAULT_BLOCKSIZE;
+  fdsrc->timeout = 0;
+  fdsrc->seq = 0;
+}
+
+static GstElementStateReturn
+gst_fdsrc_change_state (GstElement * element)
+{
+  GstFdSrc *src = GST_FDSRC (element);
+
+  switch (GST_STATE_TRANSITION (element)) {
+    case GST_STATE_NULL_TO_READY:
+      break;
+    case GST_STATE_READY_TO_NULL:
+      break;
+    case GST_STATE_READY_TO_PAUSED:
+      src->curoffset = 0;
+      break;
+    case GST_STATE_PAUSED_TO_READY:
+      break;
+    default:
+      break;
+  }
+
+  if (GST_ELEMENT_CLASS (parent_class)->change_state)
+    return GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+  return GST_STATE_SUCCESS;
+}
+
+
+static void
+gst_fdsrc_set_property (GObject * object, guint prop_id, const GValue * value,
+    GParamSpec * pspec)
+{
+  GstFdSrc *src;
+
+  g_return_if_fail (GST_IS_FDSRC (object));
+
+  src = GST_FDSRC (object);
+
+  switch (prop_id) {
+    case ARG_FD:
+      src->fd = g_value_get_int (value);
+      break;
+    case ARG_BLOCKSIZE:
+      src->blocksize = g_value_get_ulong (value);
+      break;
+    case ARG_TIMEOUT:
+      src->timeout = g_value_get_uint64 (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_fdsrc_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstFdSrc *src;
+
+  g_return_if_fail (GST_IS_FDSRC (object));
+
+  src = GST_FDSRC (object);
+
+  switch (prop_id) {
+    case ARG_BLOCKSIZE:
+      g_value_set_ulong (value, src->blocksize);
+      break;
+    case ARG_FD:
+      g_value_set_int (value, src->fd);
+      break;
+    case ARG_TIMEOUT:
+      g_value_set_uint64 (value, src->timeout);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstFlowReturn
+gst_fdsrc_create (GstPushSrc * psrc, GstBuffer ** outbuf)
+{
+  GstFdSrc *src;
+  GstBuffer *buf;
+  glong readbytes;
+
+#ifndef HAVE_WIN32
+  fd_set readfds;
+  struct timeval t, *tp = &t;
+  gint retval;
+#endif
+
+  src = GST_FDSRC (psrc);
+
+  /* create the buffer */
+  buf = gst_buffer_new_and_alloc (src->blocksize);
+
+#ifndef HAVE_WIN32
+  FD_ZERO (&readfds);
+  FD_SET (src->fd, &readfds);
+
+  if (src->timeout != 0) {
+    GST_TIME_TO_TIMEVAL (src->timeout, t);
+  } else
+    tp = NULL;
+
+  do {
+    retval = select (src->fd + 1, &readfds, NULL, NULL, tp);
+  } while (retval == -1 && errno == EINTR);     /* retry if interrupted */
+
+  if (retval == -1) {
+    GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
+        ("select on file descriptor: %s.", g_strerror (errno)));
+    return GST_FLOW_ERROR;
+  } else if (retval == 0) {
+    g_signal_emit (G_OBJECT (src), gst_fdsrc_signals[SIGNAL_TIMEOUT], 0);
+    return GST_FLOW_ERROR;
+  }
+#endif
+
+  do {
+    readbytes = read (src->fd, GST_BUFFER_DATA (buf), src->blocksize);
+  } while (readbytes == -1 && errno == EINTR);  /* retry if interrupted */
+
+  if (readbytes > 0) {
+    GST_BUFFER_OFFSET (buf) = src->curoffset;
+    GST_BUFFER_SIZE (buf) = readbytes;
+    GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
+    src->curoffset += readbytes;
+
+    /* we're done, return the buffer */
+    *outbuf = buf;
+    return GST_FLOW_OK;
+  } else if (readbytes == 0) {
+    return GST_FLOW_ERROR;
+  } else {
+    GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
+        ("read on file descriptor: %s.", g_strerror (errno)));
+    return GST_FLOW_ERROR;
+  }
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "fdsrc", GST_RANK_NONE, GST_TYPE_FDSRC);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "gstfdsrc",
+    "A source for fd (file descriptors)",
+    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
diff --git a/gst/fdsrc/gstfdsrc.h b/gst/fdsrc/gstfdsrc.h
new file mode 100644
index 00000000..00042426
--- /dev/null
+++ b/gst/fdsrc/gstfdsrc.h
@@ -0,0 +1,73 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ *                    2005 Philippe Khalaf <burger@speedy.org>
+ *
+ * gstfdsrc.h: 
+ *
+ * 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.
+ */
+
+
+#ifndef __GST_FDSRC_H__
+#define __GST_FDSRC_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstpushsrc.h>
+
+G_BEGIN_DECLS
+
+
+#define GST_TYPE_FDSRC \
+  (gst_fdsrc_get_type())
+#define GST_FDSRC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FDSRC,GstFdSrc))
+#define GST_FDSRC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FDSRC,GstFdSrcClass))
+#define GST_IS_FDSRC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FDSRC))
+#define GST_IS_FDSRC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FDSRC))
+
+
+typedef struct _GstFdSrc GstFdSrc;
+typedef struct _GstFdSrcClass GstFdSrcClass;
+
+struct _GstFdSrc {
+  GstPushSrc element;
+
+  /* fd */
+  gint fd;
+
+  gulong curoffset; /* current offset in file */
+  gulong blocksize; /* bytes per read */
+  guint64 timeout;  /* read timeout, in nanoseconds */
+  
+  gulong seq;       /* buffer sequence number */
+};
+
+struct _GstFdSrcClass {
+  GstPushSrcClass parent_class;
+
+  /* signals */
+  void (*timeout) (GstElement *element);
+};
+
+GType gst_fdsrc_get_type(void);
+
+G_END_DECLS
+
+#endif /* __GST_FDSRC_H__ */