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-rw-r--r--ext/gio/gstgiosrc.c389
1 files changed, 389 insertions, 0 deletions
diff --git a/ext/gio/gstgiosrc.c b/ext/gio/gstgiosrc.c
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index 00000000..8fe1a988
--- /dev/null
+++ b/ext/gio/gstgiosrc.c
@@ -0,0 +1,389 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:element-giosrc
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * <programlisting>
+ * gst-launch giosrc location=file:///home/foo/bar.ext ! fakesink
+ * </programlisting>
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstgiosrc.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_gio_src_debug);
+#define GST_CAT_DEFAULT gst_gio_src_debug
+
+enum
+{
+ ARG_0,
+ ARG_LOCATION
+};
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("ANY")
+ );
+
+GST_BOILERPLATE_FULL (GstGioSrc, gst_gio_src, GstBaseSrc, GST_TYPE_BASE_SRC,
+ gst_gio_uri_handler_do_init);
+
+static void gst_gio_src_finalize (GObject * object);
+static void gst_gio_src_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_gio_src_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static gboolean gst_gio_src_start (GstBaseSrc * base_src);
+static gboolean gst_gio_src_stop (GstBaseSrc * base_src);
+static gboolean gst_gio_src_get_size (GstBaseSrc * base_src, guint64 * size);
+static gboolean gst_gio_src_is_seekable (GstBaseSrc * base_src);
+static gboolean gst_gio_src_unlock (GstBaseSrc * base_src);
+static gboolean gst_gio_src_unlock_stop (GstBaseSrc * base_src);
+static gboolean gst_gio_src_check_get_range (GstBaseSrc * base_src);
+static GstFlowReturn gst_gio_src_create (GstBaseSrc * base_src, guint64 offset,
+ guint size, GstBuffer ** buf);
+
+static void
+gst_gio_src_base_init (gpointer gclass)
+{
+ static GstElementDetails element_details = {
+ "GIO source",
+ "Source/File",
+ "Read from any GVFS-supported location",
+ "Ren\xc3\xa9 Stadler <mail@renestadler.de>"
+ };
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ GST_DEBUG_CATEGORY_INIT (gst_gio_src_debug, "giosrc", 0, "GIO source");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_factory));
+ gst_element_class_set_details (element_class, &element_details);
+}
+
+static void
+gst_gio_src_class_init (GstGioSrcClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ GstBaseSrcClass *gstbasesrc_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+ gstbasesrc_class = (GstBaseSrcClass *) klass;
+
+ gobject_class->finalize = gst_gio_src_finalize;
+ gobject_class->set_property = gst_gio_src_set_property;
+ gobject_class->get_property = gst_gio_src_get_property;
+
+ g_object_class_install_property (gobject_class, ARG_LOCATION,
+ g_param_spec_string ("location", "Location", "URI location to read from",
+ NULL, G_PARAM_READWRITE));
+
+ gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_gio_src_start);
+ gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_gio_src_stop);
+ gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_gio_src_get_size);
+ gstbasesrc_class->is_seekable = GST_DEBUG_FUNCPTR (gst_gio_src_is_seekable);
+ gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_gio_src_unlock);
+ gstbasesrc_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_gio_src_unlock_stop);
+ gstbasesrc_class->check_get_range =
+ GST_DEBUG_FUNCPTR (gst_gio_src_check_get_range);
+ gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_gio_src_create);
+}
+
+static void
+gst_gio_src_init (GstGioSrc * src, GstGioSrcClass * gclass)
+{
+ src->cancel = g_cancellable_new ();
+}
+
+static void
+gst_gio_src_finalize (GObject * object)
+{
+ GstGioSrc *src = GST_GIO_SRC (object);
+
+ g_object_unref (src->cancel);
+
+ if (src->file)
+ g_object_unref (src->file);
+
+ g_free (src->location);
+
+ GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
+}
+
+static void
+gst_gio_src_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstGioSrc *src = GST_GIO_SRC (object);
+
+ switch (prop_id) {
+ case ARG_LOCATION:
+ g_free (src->location);
+ src->location = g_strdup (g_value_get_string (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_gio_src_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstGioSrc *src = GST_GIO_SRC (object);
+
+ switch (prop_id) {
+ case ARG_LOCATION:
+ g_value_set_string (value, src->location);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static gboolean
+gst_gio_src_start (GstBaseSrc * base_src)
+{
+ GstGioSrc *src = GST_GIO_SRC (base_src);
+ GError *err = NULL;
+
+ if (src->location == NULL) {
+ GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), ("No location given"));
+ return FALSE;
+ }
+
+ src->file = g_file_new_for_uri (src->location);
+
+ if (src->file == NULL) {
+ GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
+ ("Malformed URI or protocol not supported (%s)", src->location));
+ return FALSE;
+ }
+
+ src->stream = g_file_read (src->file, src->cancel, &err);
+
+ if (src->stream == NULL && !gst_gio_error (src, "g_file_read", &err, NULL)) {
+
+ if (GST_GIO_ERROR_MATCHES (err, NOT_FOUND))
+ GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
+ ("Could not open location %s for reading: %s",
+ src->location, err->message));
+ else
+ GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
+ ("Could not open location %s for reading: %s",
+ src->location, err->message));
+
+ g_clear_error (&err);
+
+ g_object_unref (src->file);
+ src->file = NULL;
+
+ return FALSE;
+
+ } else if (src->stream == NULL)
+ return FALSE;
+
+ src->position = 0;
+
+ GST_DEBUG_OBJECT (src, "opened location %s", src->location);
+
+ return TRUE;
+}
+
+static gboolean
+gst_gio_src_stop (GstBaseSrc * base_src)
+{
+ GstGioSrc *src = GST_GIO_SRC (base_src);
+ gboolean success = TRUE;
+ GError *err = NULL;
+
+ if (src->stream != NULL) {
+ /* FIXME: In case that the call below would block, there is no one to
+ * trigger the cancellation! */
+
+ success = g_input_stream_close (G_INPUT_STREAM (src->stream), src->cancel,
+ &err);
+
+ if (!success && !gst_gio_error (src, "g_input_stream_close", &err, NULL)) {
+ GST_ELEMENT_ERROR (src, RESOURCE, CLOSE, (NULL),
+ ("g_input_stream_close failed: %s", err->message));
+ g_clear_error (&err);
+ }
+
+ g_object_unref (src->stream);
+ src->stream = NULL;
+ }
+
+ if (src->file != NULL) {
+ g_object_unref (src->file);
+ src->file = NULL;
+ }
+
+ GST_DEBUG_OBJECT (src, "closed location %s", src->location);
+
+ return success;
+}
+
+static gboolean
+gst_gio_src_get_size (GstBaseSrc * base_src, guint64 * size)
+{
+ GstGioSrc *src = GST_GIO_SRC (base_src);
+ GFileInfo *info;
+ GError *err = NULL;
+
+ info = g_file_input_stream_query_info (src->stream,
+ G_FILE_ATTRIBUTE_STD_SIZE, src->cancel, &err);
+
+ if (info != NULL) {
+ *size = g_file_info_get_size (info);
+ g_object_unref (info);
+ GST_DEBUG_OBJECT (src, "found size: %" G_GUINT64_FORMAT, *size);
+ return TRUE;
+ }
+
+ if (!gst_gio_error (src, "g_file_input_stream_query_info", &err, NULL)) {
+
+ if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
+ GST_DEBUG_OBJECT (src, "size information not available");
+ else
+ GST_WARNING_OBJECT (src, "size information retrieval failed: %s",
+ err->message);
+
+ g_clear_error (&err);
+ }
+
+ return FALSE;
+}
+
+static gboolean
+gst_gio_src_is_seekable (GstBaseSrc * base_src)
+{
+ GstGioSrc *src = GST_GIO_SRC (base_src);
+ gboolean seekable;
+
+ seekable = g_seekable_can_seek (G_SEEKABLE (src->stream));
+
+ GST_DEBUG_OBJECT (src, "can seek: %d", seekable);
+
+ return seekable;
+}
+
+static gboolean
+gst_gio_src_unlock (GstBaseSrc * base_src)
+{
+ GstGioSrc *src = GST_GIO_SRC (base_src);
+
+ GST_LOG_OBJECT (src, "triggering cancellation");
+
+ g_cancellable_cancel (src->cancel);
+
+ return TRUE;
+}
+
+static gboolean
+gst_gio_src_unlock_stop (GstBaseSrc * base_src)
+{
+ GstGioSrc *src = GST_GIO_SRC (base_src);
+
+ GST_LOG_OBJECT (src, "restoring cancellable");
+
+ g_object_unref (src->cancel);
+ src->cancel = g_cancellable_new ();
+
+ return TRUE;
+}
+
+static gboolean
+gst_gio_src_check_get_range (GstBaseSrc * base_src)
+{
+ /* FIXME: Implement dry-run variant using guesswork like gnomevfssrc? */
+
+ return GST_CALL_PARENT_WITH_DEFAULT (GST_BASE_SRC_CLASS,
+ check_get_range, (base_src), FALSE);
+}
+
+static GstFlowReturn
+gst_gio_src_create (GstBaseSrc * base_src, guint64 offset, guint size,
+ GstBuffer ** buf_return)
+{
+ GstGioSrc *src = GST_GIO_SRC (base_src);
+ GstBuffer *buf;
+ gssize read;
+ gboolean success, eos;
+ GstFlowReturn ret = GST_FLOW_OK;
+ GError *err = NULL;
+
+ if (G_UNLIKELY (offset != src->position)) {
+
+ ret = gst_gio_seek (src, G_SEEKABLE (src->stream), offset, src->cancel);
+
+ if (ret == GST_FLOW_OK)
+ src->position = offset;
+ else
+ return ret;
+ }
+
+ buf = gst_buffer_new_and_alloc (size);
+
+ GST_LOG_OBJECT (src, "reading %u bytes from offset %" G_GUINT64_FORMAT,
+ size, offset);
+
+ read =
+ g_input_stream_read (G_INPUT_STREAM (src->stream), GST_BUFFER_DATA (buf),
+ size, src->cancel, &err);
+
+ success = (read >= 0);
+ eos = (size > 0 && read == 0);
+
+ if (!success && !gst_gio_error (src, "g_input_stream_read", &err, &ret)) {
+ GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
+ ("Could not read from location %s: %s", src->location, err->message));
+ g_clear_error (&err);
+ }
+
+ if (success && !eos) {
+ src->position += read;
+ GST_BUFFER_OFFSET (buf) = offset;
+ GST_BUFFER_SIZE (buf) = read;
+ *buf_return = buf;
+ } else {
+ /* !success || eos */
+ gst_buffer_unref (buf);
+ }
+
+ if (eos)
+ ret = GST_FLOW_UNEXPECTED;
+
+ return ret;
+}
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