mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
This reverts commit 065f1603b0
.
This is not considered the correct solution, see:
https://bugzilla.gnome.org/show_bug.cgi?id=703378
799 lines
25 KiB
C
799 lines
25 KiB
C
/* GStreamer base utils library missing plugins support
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* Copyright (C) 2006 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstpbutilsmissingplugins
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* @short_description: Create, recognise and parse missing-plugins messages
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*
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* <refsect2>
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* <para>
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* Functions to create, recognise and parse missing-plugins messages for
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* applications and elements.
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* </para>
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* <para>
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* Missing-plugin messages are posted on the bus by elements like decodebin
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* or playbin if they can't find an appropriate source element or decoder
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* element. The application can use these messages for two things:
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* <itemizedlist>
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* <listitem><para>
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* concise error/problem reporting to the user mentioning what exactly
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* is missing, see gst_missing_plugin_message_get_description()
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* </para></listitem>
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* <listitem><para>
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* initiate installation of missing plugins, see
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* gst_missing_plugin_message_get_installer_detail() and
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* gst_install_plugins_async()
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* </para></listitem>
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* </itemizedlist>
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* </para>
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* <para>
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* Applications may also create missing-plugin messages themselves to install
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* required elements that are missing, using the install mechanism mentioned
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* above.
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* </para>
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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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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h> /* getpid on UNIX */
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#endif
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#ifdef HAVE_PROCESS_H
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# include <process.h> /* getpid on win32 */
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#endif
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#include "gst/gst-i18n-plugin.h"
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#include "pbutils.h"
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#include "pbutils-private.h"
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#include <string.h>
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#define GST_DETAIL_STRING_MARKER "gstreamer"
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typedef enum
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{
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GST_MISSING_TYPE_UNKNOWN = 0,
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GST_MISSING_TYPE_URISOURCE,
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GST_MISSING_TYPE_URISINK,
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GST_MISSING_TYPE_ELEMENT,
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GST_MISSING_TYPE_DECODER,
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GST_MISSING_TYPE_ENCODER
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} GstMissingType;
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static const struct
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{
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GstMissingType type;
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const gchar type_string[12];
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} missing_type_mapping[] = {
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{
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GST_MISSING_TYPE_URISOURCE, "urisource"}, {
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GST_MISSING_TYPE_URISINK, "urisink"}, {
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GST_MISSING_TYPE_ELEMENT, "element"}, {
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GST_MISSING_TYPE_DECODER, "decoder"}, {
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GST_MISSING_TYPE_ENCODER, "encoder"}
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};
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static GstMissingType
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missing_structure_get_type (const GstStructure * s)
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{
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const gchar *type;
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guint i;
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type = gst_structure_get_string (s, "type");
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g_return_val_if_fail (type != NULL, GST_MISSING_TYPE_UNKNOWN);
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for (i = 0; i < G_N_ELEMENTS (missing_type_mapping); ++i) {
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if (strcmp (missing_type_mapping[i].type_string, type) == 0)
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return missing_type_mapping[i].type;
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}
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return GST_MISSING_TYPE_UNKNOWN;
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}
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GstCaps *
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copy_and_clean_caps (const GstCaps * caps)
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{
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GstStructure *s;
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GstCaps *ret;
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ret = gst_caps_copy (caps);
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/* make caps easier to interpret, remove common fields that are likely
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* to be irrelevant for determining the right plugin (ie. mostly fields
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* where template caps usually have the standard MIN - MAX range as value) */
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s = gst_caps_get_structure (ret, 0);
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gst_structure_remove_field (s, "codec_data");
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gst_structure_remove_field (s, "palette_data");
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gst_structure_remove_field (s, "pixel-aspect-ratio");
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gst_structure_remove_field (s, "framerate");
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gst_structure_remove_field (s, "leaf_size");
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gst_structure_remove_field (s, "packet_size");
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gst_structure_remove_field (s, "block_align");
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gst_structure_remove_field (s, "metadata-interval"); /* icy caps */
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/* decoders/encoders almost always handle the usual width/height/channel/rate
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* range (and if we don't remove this then the app will have a much harder
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* time blacklisting formats it has unsuccessfully tried to install before) */
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gst_structure_remove_field (s, "width");
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gst_structure_remove_field (s, "depth");
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gst_structure_remove_field (s, "height");
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gst_structure_remove_field (s, "channels");
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gst_structure_remove_field (s, "rate");
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/* rtp fields */
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gst_structure_remove_field (s, "config");
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gst_structure_remove_field (s, "clock-rate");
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gst_structure_remove_field (s, "clock-base");
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gst_structure_remove_field (s, "maxps");
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gst_structure_remove_field (s, "seqnum-base");
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gst_structure_remove_field (s, "npt-start");
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gst_structure_remove_field (s, "npt-stop");
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gst_structure_remove_field (s, "play-speed");
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gst_structure_remove_field (s, "play-scale");
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gst_structure_remove_field (s, "dynamic_range");
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return ret;
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}
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/**
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* gst_missing_uri_source_message_new:
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* @element: the #GstElement posting the message
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* @protocol: the URI protocol the missing source needs to implement,
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* e.g. "http" or "mms"
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*
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* Creates a missing-plugin message for @element to notify the application
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* that a source element for a particular URI protocol is missing. This
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* function is mainly for use in plugins.
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*
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* Returns: (transfer full): a new #GstMessage, or NULL on error
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*/
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GstMessage *
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gst_missing_uri_source_message_new (GstElement * element,
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const gchar * protocol)
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{
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GstStructure *s;
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gchar *description;
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g_return_val_if_fail (element != NULL, NULL);
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g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
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g_return_val_if_fail (protocol != NULL, NULL);
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description = gst_pb_utils_get_source_description (protocol);
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s = gst_structure_new ("missing-plugin", "type", G_TYPE_STRING,
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"urisource", "detail", G_TYPE_STRING, protocol, "name", G_TYPE_STRING,
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description, NULL);
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g_free (description);
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return gst_message_new_element (GST_OBJECT_CAST (element), s);
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}
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/**
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* gst_missing_uri_sink_message_new:
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* @element: the #GstElement posting the message
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* @protocol: the URI protocol the missing sink needs to implement,
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* e.g. "http" or "smb"
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*
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* Creates a missing-plugin message for @element to notify the application
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* that a sink element for a particular URI protocol is missing. This
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* function is mainly for use in plugins.
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*
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* Returns: (transfer full): a new #GstMessage, or NULL on error
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*/
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GstMessage *
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gst_missing_uri_sink_message_new (GstElement * element, const gchar * protocol)
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{
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GstStructure *s;
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gchar *description;
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g_return_val_if_fail (element != NULL, NULL);
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g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
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g_return_val_if_fail (protocol != NULL, NULL);
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description = gst_pb_utils_get_sink_description (protocol);
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s = gst_structure_new ("missing-plugin", "type", G_TYPE_STRING,
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"urisink", "detail", G_TYPE_STRING, protocol, "name", G_TYPE_STRING,
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description, NULL);
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g_free (description);
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return gst_message_new_element (GST_OBJECT_CAST (element), s);
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}
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/**
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* gst_missing_element_message_new:
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* @element: the #GstElement posting the message
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* @factory_name: the name of the missing element (element factory),
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* e.g. "videoscale" or "cdparanoiasrc"
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*
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* Creates a missing-plugin message for @element to notify the application
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* that a certain required element is missing. This function is mainly for
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* use in plugins.
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*
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* Returns: (transfer full): a new #GstMessage, or NULL on error
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*/
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GstMessage *
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gst_missing_element_message_new (GstElement * element,
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const gchar * factory_name)
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{
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GstStructure *s;
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gchar *description;
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g_return_val_if_fail (element != NULL, NULL);
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g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
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g_return_val_if_fail (factory_name != NULL, NULL);
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description = gst_pb_utils_get_element_description (factory_name);
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s = gst_structure_new ("missing-plugin", "type", G_TYPE_STRING,
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"element", "detail", G_TYPE_STRING, factory_name, "name", G_TYPE_STRING,
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description, NULL);
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g_free (description);
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return gst_message_new_element (GST_OBJECT_CAST (element), s);
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}
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/**
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* gst_missing_decoder_message_new:
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* @element: the #GstElement posting the message
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* @decode_caps: the (fixed) caps for which a decoder element is needed
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*
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* Creates a missing-plugin message for @element to notify the application
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* that a decoder element for a particular set of (fixed) caps is missing.
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* This function is mainly for use in plugins.
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*
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* Returns: (transfer full): a new #GstMessage, or NULL on error
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*/
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GstMessage *
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gst_missing_decoder_message_new (GstElement * element,
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const GstCaps * decode_caps)
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{
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GstStructure *s;
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GstCaps *caps;
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gchar *description;
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g_return_val_if_fail (element != NULL, NULL);
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g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
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g_return_val_if_fail (decode_caps != NULL, NULL);
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g_return_val_if_fail (GST_IS_CAPS (decode_caps), NULL);
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g_return_val_if_fail (!gst_caps_is_any (decode_caps), NULL);
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g_return_val_if_fail (!gst_caps_is_empty (decode_caps), NULL);
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g_return_val_if_fail (gst_caps_is_fixed (decode_caps), NULL);
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description = gst_pb_utils_get_decoder_description (decode_caps);
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caps = copy_and_clean_caps (decode_caps);
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s = gst_structure_new ("missing-plugin", "type", G_TYPE_STRING,
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"decoder", "detail", GST_TYPE_CAPS, caps, "name", G_TYPE_STRING,
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description, NULL);
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gst_caps_unref (caps);
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g_free (description);
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return gst_message_new_element (GST_OBJECT_CAST (element), s);
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}
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/**
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* gst_missing_encoder_message_new:
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* @element: the #GstElement posting the message
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* @encode_caps: the (fixed) caps for which an encoder element is needed
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*
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* Creates a missing-plugin message for @element to notify the application
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* that an encoder element for a particular set of (fixed) caps is missing.
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* This function is mainly for use in plugins.
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*
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* Returns: (transfer full): a new #GstMessage, or NULL on error
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*/
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GstMessage *
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gst_missing_encoder_message_new (GstElement * element,
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const GstCaps * encode_caps)
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{
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GstStructure *s;
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GstCaps *caps;
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gchar *description;
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g_return_val_if_fail (element != NULL, NULL);
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g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
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g_return_val_if_fail (encode_caps != NULL, NULL);
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g_return_val_if_fail (GST_IS_CAPS (encode_caps), NULL);
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g_return_val_if_fail (!gst_caps_is_any (encode_caps), NULL);
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g_return_val_if_fail (!gst_caps_is_empty (encode_caps), NULL);
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g_return_val_if_fail (gst_caps_is_fixed (encode_caps), NULL);
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description = gst_pb_utils_get_encoder_description (encode_caps);
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caps = copy_and_clean_caps (encode_caps);
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s = gst_structure_new ("missing-plugin", "type", G_TYPE_STRING,
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"encoder", "detail", GST_TYPE_CAPS, caps, "name", G_TYPE_STRING,
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description, NULL);
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gst_caps_unref (caps);
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g_free (description);
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return gst_message_new_element (GST_OBJECT_CAST (element), s);
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}
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static gboolean
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missing_structure_get_string_detail (const GstStructure * s, gchar ** p_detail)
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{
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const gchar *detail;
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GType detail_type;
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*p_detail = NULL;
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detail_type = gst_structure_get_field_type (s, "detail");
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if (!g_type_is_a (detail_type, G_TYPE_STRING)) {
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GST_WARNING ("expected 'detail' field to be of G_TYPE_STRING");
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return FALSE;
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}
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detail = gst_structure_get_string (s, "detail");
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if (detail == NULL || *detail == '\0') {
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GST_WARNING ("empty 'detail' field");
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return FALSE;
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}
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*p_detail = g_strdup (detail);
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return TRUE;
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}
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static gboolean
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missing_structure_get_caps_detail (const GstStructure * s, GstCaps ** p_caps)
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{
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const GstCaps *caps;
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const GValue *val;
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GType detail_type;
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*p_caps = NULL;
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detail_type = gst_structure_get_field_type (s, "detail");
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if (!g_type_is_a (detail_type, GST_TYPE_CAPS)) {
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GST_WARNING ("expected 'detail' field to be of GST_TYPE_CAPS");
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return FALSE;
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}
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val = gst_structure_get_value (s, "detail");
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caps = gst_value_get_caps (val);
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if (gst_caps_is_empty (caps) || gst_caps_is_any (caps)) {
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GST_WARNING ("EMPTY or ANY caps not allowed");
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return FALSE;
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}
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*p_caps = gst_caps_copy (caps);
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return TRUE;
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}
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|
|
/**
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* gst_missing_plugin_message_get_installer_detail:
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* @msg: a missing-plugin #GstMessage of type #GST_MESSAGE_ELEMENT
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*
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* Returns an opaque string containing all the details about the missing
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* element to be passed to an external installer called via
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* gst_install_plugins_async() or gst_install_plugins_sync().
|
|
*
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* This function is mainly for applications that call external plugin
|
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* installation mechanisms using one of the two above-mentioned functions.
|
|
*
|
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* Returns: a newly-allocated detail string, or NULL on error. Free string
|
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* with g_free() when not needed any longer.
|
|
*/
|
|
gchar *
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gst_missing_plugin_message_get_installer_detail (GstMessage * msg)
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{
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|
GstMissingType missing_type;
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const gchar *progname;
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const gchar *type;
|
|
GString *str = NULL;
|
|
gchar *detail = NULL;
|
|
gchar *desc;
|
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const GstStructure *structure;
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|
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g_return_val_if_fail (gst_is_missing_plugin_message (msg), NULL);
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|
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structure = gst_message_get_structure (msg);
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GST_LOG ("Parsing missing-plugin message: %" GST_PTR_FORMAT, structure);
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|
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missing_type = missing_structure_get_type (structure);
|
|
if (missing_type == GST_MISSING_TYPE_UNKNOWN) {
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GST_WARNING ("couldn't parse 'type' field");
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goto error;
|
|
}
|
|
|
|
type = gst_structure_get_string (structure, "type");
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g_assert (type != NULL); /* validity already checked above */
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|
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/* FIXME: use gst_installer_detail_new() here too */
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str = g_string_new (GST_DETAIL_STRING_MARKER "|");
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g_string_append_printf (str, "%s|", GST_API_VERSION);
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|
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progname = (const gchar *) g_get_prgname ();
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if (progname) {
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g_string_append_printf (str, "%s|", progname);
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} else {
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g_string_append_printf (str, "pid/%lu|", (gulong) getpid ());
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}
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|
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desc = gst_missing_plugin_message_get_description (msg);
|
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if (desc) {
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g_strdelimit (desc, "|", '#');
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g_string_append_printf (str, "%s|", desc);
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g_free (desc);
|
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} else {
|
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g_string_append (str, "|");
|
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}
|
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|
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switch (missing_type) {
|
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case GST_MISSING_TYPE_URISOURCE:
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case GST_MISSING_TYPE_URISINK:
|
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case GST_MISSING_TYPE_ELEMENT:
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if (!missing_structure_get_string_detail (structure, &detail))
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goto error;
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break;
|
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case GST_MISSING_TYPE_DECODER:
|
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case GST_MISSING_TYPE_ENCODER:{
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GstCaps *caps = NULL;
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|
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if (!missing_structure_get_caps_detail (structure, &caps))
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goto error;
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|
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detail = gst_caps_to_string (caps);
|
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gst_caps_unref (caps);
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break;
|
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}
|
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default:
|
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g_return_val_if_reached (NULL);
|
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}
|
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|
|
g_string_append_printf (str, "%s-%s", type, detail);
|
|
g_free (detail);
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|
|
return g_string_free (str, FALSE);
|
|
|
|
/* ERRORS */
|
|
error:
|
|
{
|
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GST_WARNING ("Failed to parse missing-plugin msg: %" GST_PTR_FORMAT, msg);
|
|
if (str)
|
|
g_string_free (str, TRUE);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_missing_plugin_message_get_description:
|
|
* @msg: a missing-plugin #GstMessage of type #GST_MESSAGE_ELEMENT
|
|
*
|
|
* Returns a localised string describing the missing feature, for use in
|
|
* error dialogs and the like. Should never return NULL unless @msg is not
|
|
* a valid missing-plugin message.
|
|
*
|
|
* This function is mainly for applications that need a human-readable string
|
|
* describing a missing plugin, given a previously collected missing-plugin
|
|
* message
|
|
*
|
|
* Returns: a newly-allocated description string, or NULL on error. Free
|
|
* string with g_free() when not needed any longer.
|
|
*/
|
|
gchar *
|
|
gst_missing_plugin_message_get_description (GstMessage * msg)
|
|
{
|
|
GstMissingType missing_type;
|
|
const gchar *desc;
|
|
gchar *ret = NULL;
|
|
const GstStructure *structure;
|
|
|
|
g_return_val_if_fail (gst_is_missing_plugin_message (msg), NULL);
|
|
|
|
structure = gst_message_get_structure (msg);
|
|
GST_LOG ("Parsing missing-plugin message: %" GST_PTR_FORMAT, structure);
|
|
|
|
desc = gst_structure_get_string (structure, "name");
|
|
if (desc != NULL && *desc != '\0') {
|
|
ret = g_strdup (desc);
|
|
goto done;
|
|
}
|
|
|
|
/* fallback #1 */
|
|
missing_type = missing_structure_get_type (structure);
|
|
|
|
switch (missing_type) {
|
|
case GST_MISSING_TYPE_URISOURCE:
|
|
case GST_MISSING_TYPE_URISINK:
|
|
case GST_MISSING_TYPE_ELEMENT:{
|
|
gchar *detail = NULL;
|
|
|
|
if (missing_structure_get_string_detail (structure, &detail)) {
|
|
if (missing_type == GST_MISSING_TYPE_URISOURCE)
|
|
ret = gst_pb_utils_get_source_description (detail);
|
|
else if (missing_type == GST_MISSING_TYPE_URISINK)
|
|
ret = gst_pb_utils_get_sink_description (detail);
|
|
else
|
|
ret = gst_pb_utils_get_sink_description (detail);
|
|
g_free (detail);
|
|
}
|
|
break;
|
|
}
|
|
case GST_MISSING_TYPE_DECODER:
|
|
case GST_MISSING_TYPE_ENCODER:{
|
|
GstCaps *caps = NULL;
|
|
|
|
if (missing_structure_get_caps_detail (structure, &caps)) {
|
|
if (missing_type == GST_MISSING_TYPE_DECODER)
|
|
ret = gst_pb_utils_get_decoder_description (caps);
|
|
else
|
|
ret = gst_pb_utils_get_encoder_description (caps);
|
|
gst_caps_unref (caps);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (ret)
|
|
goto done;
|
|
|
|
/* fallback #2 */
|
|
switch (missing_type) {
|
|
case GST_MISSING_TYPE_URISOURCE:
|
|
desc = _("Unknown source element");
|
|
break;
|
|
case GST_MISSING_TYPE_URISINK:
|
|
desc = _("Unknown sink element");
|
|
break;
|
|
case GST_MISSING_TYPE_ELEMENT:
|
|
desc = _("Unknown element");
|
|
break;
|
|
case GST_MISSING_TYPE_DECODER:
|
|
desc = _("Unknown decoder element");
|
|
break;
|
|
case GST_MISSING_TYPE_ENCODER:
|
|
desc = _("Unknown encoder element");
|
|
break;
|
|
default:
|
|
/* we should really never get here, but we better still return
|
|
* something if we do */
|
|
desc = _("Plugin or element of unknown type");
|
|
break;
|
|
}
|
|
ret = g_strdup (desc);
|
|
|
|
done:
|
|
|
|
GST_LOG ("returning '%s'", ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_is_missing_plugin_message:
|
|
* @msg: a #GstMessage
|
|
*
|
|
* Checks whether @msg is a missing plugins message.
|
|
*
|
|
* Returns: %TRUE if @msg is a missing-plugins message, otherwise %FALSE.
|
|
*/
|
|
gboolean
|
|
gst_is_missing_plugin_message (GstMessage * msg)
|
|
{
|
|
const GstStructure *structure;
|
|
|
|
g_return_val_if_fail (msg != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_MESSAGE (msg), FALSE);
|
|
|
|
structure = gst_message_get_structure (msg);
|
|
if (GST_MESSAGE_TYPE (msg) != GST_MESSAGE_ELEMENT || structure == NULL)
|
|
return FALSE;
|
|
|
|
return gst_structure_has_name (structure, "missing-plugin");
|
|
}
|
|
|
|
/* takes ownership of the description */
|
|
static gchar *
|
|
gst_installer_detail_new (gchar * description, const gchar * type,
|
|
const gchar * detail)
|
|
{
|
|
const gchar *progname;
|
|
GString *s;
|
|
|
|
s = g_string_new (GST_DETAIL_STRING_MARKER "|");
|
|
g_string_append_printf (s, "%s|", GST_API_VERSION);
|
|
|
|
progname = (const gchar *) g_get_prgname ();
|
|
if (progname) {
|
|
g_string_append_printf (s, "%s|", progname);
|
|
} else {
|
|
g_string_append_printf (s, "pid/%lu|", (gulong) getpid ());
|
|
}
|
|
|
|
if (description) {
|
|
g_strdelimit (description, "|", '#');
|
|
g_string_append_printf (s, "%s|", description);
|
|
g_free (description);
|
|
} else {
|
|
g_string_append (s, "|");
|
|
}
|
|
|
|
g_string_append_printf (s, "%s-%s", type, detail);
|
|
|
|
return g_string_free (s, FALSE);
|
|
}
|
|
|
|
/**
|
|
* gst_missing_uri_source_installer_detail_new:
|
|
* @protocol: the URI protocol the missing source needs to implement,
|
|
* e.g. "http" or "mms"
|
|
*
|
|
* Returns an opaque string containing all the details about the missing
|
|
* element to be passed to an external installer called via
|
|
* gst_install_plugins_async() or gst_install_plugins_sync().
|
|
*
|
|
* This function is mainly for applications that call external plugin
|
|
* installation mechanisms using one of the two above-mentioned functions in
|
|
* the case where the application knows exactly what kind of plugin it is
|
|
* missing.
|
|
*
|
|
* Returns: a newly-allocated detail string, or NULL on error. Free string
|
|
* with g_free() when not needed any longer.
|
|
*/
|
|
gchar *
|
|
gst_missing_uri_source_installer_detail_new (const gchar * protocol)
|
|
{
|
|
gchar *desc;
|
|
|
|
g_return_val_if_fail (protocol != NULL, NULL);
|
|
|
|
desc = gst_pb_utils_get_source_description (protocol);
|
|
return gst_installer_detail_new (desc, "urisource", protocol);
|
|
}
|
|
|
|
/**
|
|
* gst_missing_uri_sink_installer_detail_new:
|
|
* @protocol: the URI protocol the missing source needs to implement,
|
|
* e.g. "http" or "mms"
|
|
*
|
|
* Returns an opaque string containing all the details about the missing
|
|
* element to be passed to an external installer called via
|
|
* gst_install_plugins_async() or gst_install_plugins_sync().
|
|
*
|
|
* This function is mainly for applications that call external plugin
|
|
* installation mechanisms using one of the two above-mentioned functions in
|
|
* the case where the application knows exactly what kind of plugin it is
|
|
* missing.
|
|
*
|
|
* Returns: a newly-allocated detail string, or NULL on error. Free string
|
|
* with g_free() when not needed any longer.
|
|
*/
|
|
gchar *
|
|
gst_missing_uri_sink_installer_detail_new (const gchar * protocol)
|
|
{
|
|
gchar *desc;
|
|
|
|
g_return_val_if_fail (protocol != NULL, NULL);
|
|
|
|
desc = gst_pb_utils_get_sink_description (protocol);
|
|
return gst_installer_detail_new (desc, "urisink", protocol);
|
|
}
|
|
|
|
/**
|
|
* gst_missing_element_installer_detail_new:
|
|
* @factory_name: the name of the missing element (element factory),
|
|
* e.g. "videoscale" or "cdparanoiasrc"
|
|
*
|
|
* Returns an opaque string containing all the details about the missing
|
|
* element to be passed to an external installer called via
|
|
* gst_install_plugins_async() or gst_install_plugins_sync().
|
|
*
|
|
* This function is mainly for applications that call external plugin
|
|
* installation mechanisms using one of the two above-mentioned functions in
|
|
* the case where the application knows exactly what kind of plugin it is
|
|
* missing.
|
|
*
|
|
* Returns: a newly-allocated detail string, or NULL on error. Free string
|
|
* with g_free() when not needed any longer.
|
|
*/
|
|
gchar *
|
|
gst_missing_element_installer_detail_new (const gchar * factory_name)
|
|
{
|
|
gchar *desc;
|
|
|
|
g_return_val_if_fail (factory_name != NULL, NULL);
|
|
|
|
desc = gst_pb_utils_get_element_description (factory_name);
|
|
return gst_installer_detail_new (desc, "element", factory_name);
|
|
}
|
|
|
|
/**
|
|
* gst_missing_decoder_installer_detail_new:
|
|
* @decode_caps: the (fixed) caps for which a decoder element is needed
|
|
*
|
|
* Returns an opaque string containing all the details about the missing
|
|
* element to be passed to an external installer called via
|
|
* gst_install_plugins_async() or gst_install_plugins_sync().
|
|
*
|
|
* This function is mainly for applications that call external plugin
|
|
* installation mechanisms using one of the two above-mentioned functions in
|
|
* the case where the application knows exactly what kind of plugin it is
|
|
* missing.
|
|
*
|
|
* Returns: a newly-allocated detail string, or NULL on error. Free string
|
|
* with g_free() when not needed any longer.
|
|
*/
|
|
gchar *
|
|
gst_missing_decoder_installer_detail_new (const GstCaps * decode_caps)
|
|
{
|
|
GstCaps *caps;
|
|
gchar *detail_str, *caps_str, *desc;
|
|
|
|
g_return_val_if_fail (decode_caps != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_CAPS (decode_caps), NULL);
|
|
g_return_val_if_fail (!gst_caps_is_any (decode_caps), NULL);
|
|
g_return_val_if_fail (!gst_caps_is_empty (decode_caps), NULL);
|
|
g_return_val_if_fail (gst_caps_is_fixed (decode_caps), NULL);
|
|
|
|
desc = gst_pb_utils_get_decoder_description (decode_caps);
|
|
caps = copy_and_clean_caps (decode_caps);
|
|
caps_str = gst_caps_to_string (caps);
|
|
detail_str = gst_installer_detail_new (desc, "decoder", caps_str);
|
|
g_free (caps_str);
|
|
gst_caps_unref (caps);
|
|
|
|
return detail_str;
|
|
}
|
|
|
|
/**
|
|
* gst_missing_encoder_installer_detail_new:
|
|
* @encode_caps: the (fixed) caps for which an encoder element is needed
|
|
*
|
|
* Returns an opaque string containing all the details about the missing
|
|
* element to be passed to an external installer called via
|
|
* gst_install_plugins_async() or gst_install_plugins_sync().
|
|
*
|
|
* This function is mainly for applications that call external plugin
|
|
* installation mechanisms using one of the two above-mentioned functions in
|
|
* the case where the application knows exactly what kind of plugin it is
|
|
* missing.
|
|
*
|
|
* Returns: a newly-allocated detail string, or NULL on error. Free string
|
|
* with g_free() when not needed any longer.
|
|
*/
|
|
gchar *
|
|
gst_missing_encoder_installer_detail_new (const GstCaps * encode_caps)
|
|
{
|
|
GstCaps *caps;
|
|
gchar *detail_str, *caps_str, *desc;
|
|
|
|
g_return_val_if_fail (encode_caps != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_CAPS (encode_caps), NULL);
|
|
g_return_val_if_fail (!gst_caps_is_any (encode_caps), NULL);
|
|
g_return_val_if_fail (!gst_caps_is_empty (encode_caps), NULL);
|
|
g_return_val_if_fail (gst_caps_is_fixed (encode_caps), NULL);
|
|
|
|
desc = gst_pb_utils_get_encoder_description (encode_caps);
|
|
caps = copy_and_clean_caps (encode_caps);
|
|
caps_str = gst_caps_to_string (caps);
|
|
detail_str = gst_installer_detail_new (desc, "encoder", caps_str);
|
|
g_free (caps_str);
|
|
gst_caps_unref (caps);
|
|
|
|
return detail_str;
|
|
}
|