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203 lines
5.9 KiB
C
203 lines
5.9 KiB
C
/* GStreamer Push File Source
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* Copyright (C) <2007> Tim-Philipp Müller <tim centricular net>
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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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/**
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* SECTION:element-pushfilesrc
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* @see_also: filesrc
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*
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* This element is only useful for debugging purposes. It implements an URI
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* protocol handler for the 'pushfile' protocol and behaves like a file source
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* element that cannot be activated in pull-mode. This makes it very easy to
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* debug demuxers or decoders that can operate both pull and push-based in
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* connection with the playbin element (which creates a source based on the
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* URI passed).
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch-1.0 -m playbin uri=pushfile:///home/you/some/file.ogg
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* ]| This plays back the given file using playbin, with the demuxer operating
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* push-based.
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* </refsect2>
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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 "gstpushfilesrc.h"
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#include <gst/gst.h>
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GST_DEBUG_CATEGORY_STATIC (pushfilesrc_debug);
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#define GST_CAT_DEFAULT pushfilesrc_debug
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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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static void gst_push_file_src_uri_handler_init (gpointer g_iface,
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gpointer iface_data);
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#define gst_push_file_src_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstPushFileSrc, gst_push_file_src, GST_TYPE_BIN,
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G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER,
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gst_push_file_src_uri_handler_init));
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static void
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gst_push_file_src_dispose (GObject * obj)
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{
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GstPushFileSrc *src = GST_PUSH_FILE_SRC (obj);
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if (src->srcpad) {
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gst_element_remove_pad (GST_ELEMENT (src), src->srcpad);
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src->srcpad = NULL;
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}
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if (src->filesrc) {
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gst_bin_remove (GST_BIN (src), src->filesrc);
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src->filesrc = NULL;
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}
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G_OBJECT_CLASS (parent_class)->dispose (obj);
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}
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static void
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gst_push_file_src_class_init (GstPushFileSrcClass * g_class)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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gobject_class = G_OBJECT_CLASS (g_class);
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element_class = GST_ELEMENT_CLASS (g_class);
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GST_DEBUG_CATEGORY_INIT (pushfilesrc_debug, "pushfilesrc", 0,
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"pushfilesrc element");
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gobject_class->dispose = gst_push_file_src_dispose;
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&srctemplate));
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gst_element_class_set_static_metadata (element_class, "Push File Source",
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"Testing",
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"Implements pushfile:// URI-handler for push-based file access",
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"Tim-Philipp Müller <tim centricular net>");
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}
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static gboolean
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gst_push_file_src_ghostpad_query (GstPad * pad, GstObject * parent,
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GstQuery * query)
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{
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gboolean res;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_SCHEDULING:
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gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0);
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gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH);
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res = TRUE;
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break;
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default:
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res = gst_pad_query_default (pad, parent, query);
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break;
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}
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return res;
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}
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static void
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gst_push_file_src_init (GstPushFileSrc * src)
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{
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src->filesrc = gst_element_factory_make ("filesrc", "real-filesrc");
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if (src->filesrc) {
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GstPad *pad;
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gst_bin_add (GST_BIN (src), src->filesrc);
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pad = gst_element_get_static_pad (src->filesrc, "src");
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g_assert (pad != NULL);
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src->srcpad = gst_ghost_pad_new ("src", pad);
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/* FIXME^H^HCORE: try pushfile:///foo/bar.ext ! typefind ! fakesink without
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* this and watch core bugginess (some pad stays in flushing state) */
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gst_pad_set_query_function (src->srcpad,
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GST_DEBUG_FUNCPTR (gst_push_file_src_ghostpad_query));
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gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
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gst_object_unref (pad);
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}
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}
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/*** GSTURIHANDLER INTERFACE *************************************************/
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static GstURIType
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gst_push_file_src_uri_get_type (GType type)
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{
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return GST_URI_SRC;
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}
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static const gchar *const *
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gst_push_file_src_uri_get_protocols (GType type)
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{
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static const gchar *protocols[] = { "pushfile", NULL };
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return protocols;
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}
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static gchar *
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gst_push_file_src_uri_get_uri (GstURIHandler * handler)
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{
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GstPushFileSrc *src = GST_PUSH_FILE_SRC (handler);
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gchar *fileuri, *pushfileuri;
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if (src->filesrc == NULL)
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return NULL;
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fileuri = gst_uri_handler_get_uri (GST_URI_HANDLER (src->filesrc));;
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if (fileuri == NULL)
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return NULL;
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pushfileuri = g_strconcat ("push", fileuri, NULL);
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g_free (fileuri);
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return pushfileuri;
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}
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static gboolean
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gst_push_file_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
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GError ** error)
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{
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GstPushFileSrc *src = GST_PUSH_FILE_SRC (handler);
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if (src->filesrc == NULL) {
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g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_STATE,
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"Could not create file source element");
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return FALSE;
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}
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/* skip 'push' bit */
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return gst_uri_handler_set_uri (GST_URI_HANDLER (src->filesrc), uri + 4,
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error);
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}
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static void
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gst_push_file_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
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{
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GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
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iface->get_type = gst_push_file_src_uri_get_type;
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iface->get_protocols = gst_push_file_src_uri_get_protocols;
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iface->get_uri = gst_push_file_src_uri_get_uri;
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iface->set_uri = gst_push_file_src_uri_set_uri;
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}
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