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* Implement the GstURIHandlerInterface * Rework the locking * Implement backward seeking handling * Generate documentation
657 lines
19 KiB
C
657 lines
19 KiB
C
/* GStreamer
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* Copyright (C) 2006 David A. Schleef ds@schleef.org
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* Copyright (C) 2019 Cesar Fabian Orccon Chipana
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* Copyright (C) 2020 Thibault Saunier <tsaunier@igalia.com>
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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 Street, Suite 500,
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* Boston, MA 02110-1335, USA.
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*/
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/**
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* SECTION:element-imagesequencesrc
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*
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* Stream image sequences from image files.
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*
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* ```
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* gst-launch-1.0 imagesequencesrc location=image-%05d.jpg start-index=1 stop-index=50 framerate=24/1 ! decodebin ! videoconvert ! autovideosink
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* ```
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*
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* This elements implements the #GstURIHandler interface meaning that you can use it with playbin,
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* (make sure to quote the URI for the filename pattern, like: `%2505d` instead of the `%05d` you would use
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* when dealing with the location).
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*
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* Note that you can pass the #imagesequencesrc:framerate, #imagesequencesrc:start-index and #imagesequencesrc:stop-index
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* properties directly in the URI using its 'query' component, for example:
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*
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* ```
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* gst-launch-1.0 playbin uri="imagesequence://path/to/image-%2505d.jpeg?start-index=0&framerate=30/1"
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* ```
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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.h>
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#include <gst/base/gsttypefindhelper.h>
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#include "gstimagesequencesrc.h"
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#define LOCK(self) (g_rec_mutex_lock (&self->fields_lock))
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#define UNLOCK(self) (g_rec_mutex_unlock (&self->fields_lock))
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static GstFlowReturn gst_image_sequence_src_create (GstPushSrc * src,
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GstBuffer ** buffer);
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static void gst_image_sequence_src_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_image_sequence_src_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static GstCaps *gst_image_sequence_src_getcaps (GstBaseSrc * src,
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GstCaps * filter);
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static gboolean gst_image_sequence_src_query (GstBaseSrc * src,
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GstQuery * query);
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static void gst_image_sequence_src_set_caps (GstImageSequenceSrc * self,
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GstCaps * caps);
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static void gst_image_sequence_src_set_duration (GstImageSequenceSrc * self);
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static gint gst_image_sequence_src_count_frames (GstImageSequenceSrc * self,
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gboolean can_read);
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static GstStaticPadTemplate gst_image_sequence_src_pad_template =
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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_image_sequence_src_debug);
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#define GST_CAT_DEFAULT gst_image_sequence_src_debug
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enum
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{
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PROP_0,
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PROP_LOCATION,
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PROP_START_INDEX,
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PROP_STOP_INDEX,
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PROP_FRAMERATE
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};
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#define DEFAULT_LOCATION "%05d"
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#define DEFAULT_START_INDEX 0
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#define DEFAULT_STOP_INDEX -1
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#define DEFAULT_FRAMERATE 30
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/* Call with LOCK taken */
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static gboolean
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gst_image_sequence_src_set_location (GstImageSequenceSrc * self,
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const gchar * location)
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{
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g_free (self->path);
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if (location != NULL)
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self->path = g_strdup (location);
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else
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self->path = NULL;
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return TRUE;
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}
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/*** GSTURIHANDLER INTERFACE *************************************************/
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static GstURIType
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gst_image_sequence_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_image_sequence_src_uri_get_protocols (GType type)
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{
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static const gchar *protocols[] = { "imagesequence", NULL };
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return protocols;
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}
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static gchar *
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gst_image_sequence_src_uri_get_uri (GstURIHandler * handler)
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{
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (handler);
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gchar *uri = NULL;
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LOCK (self);
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if (self->uri)
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uri = gst_uri_to_string (self->uri);
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else if (self->path)
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uri = gst_uri_construct ("imagesequence", self->path);
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UNLOCK (self);
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return uri;
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}
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static gboolean
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gst_image_sequence_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
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GError ** err)
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{
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gchar *hostname = NULL, *location = NULL, *tmp;
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gboolean ret = FALSE;
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (handler);
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GstUri *ruri = gst_uri_from_string (uri);
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GHashTable *query = NULL;
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if (!ruri) {
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g_set_error (err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
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"imagesequencesrc URI is invalid: '%s'", uri);
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goto beach;
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}
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LOCK (self);
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g_clear_pointer (&self->uri, gst_uri_unref);
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self->uri = ruri;
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tmp = gst_filename_to_uri (gst_uri_get_path (ruri), err);
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location = g_filename_from_uri (tmp, &hostname, err);
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g_free (tmp);
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query = gst_uri_get_query_table (ruri);
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if (!location || (err != NULL && *err != NULL)) {
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GST_WARNING_OBJECT (self, "Invalid URI '%s' for imagesequencesrc: %s", uri,
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(err != NULL && *err != NULL) ? (*err)->message : "unknown error");
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goto beach;
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}
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if (hostname && strcmp (hostname, "localhost")) {
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/* Only 'localhost' is permitted */
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GST_WARNING_OBJECT (self, "Invalid hostname '%s' for filesrc", hostname);
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g_set_error (err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
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"File URI with invalid hostname '%s'", hostname);
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goto beach;
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}
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#ifdef G_OS_WIN32
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/* Unfortunately, g_filename_from_uri() doesn't handle some UNC paths
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* correctly on windows, it leaves them with an extra backslash
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* at the start if they're of the mozilla-style file://///host/path/file
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* form. Correct this.
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*/
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if (location[0] == '\\' && location[1] == '\\' && location[2] == '\\')
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memmove (location, location + 1, strlen (location + 1) + 1);
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#endif
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ret = gst_image_sequence_src_set_location (self, location);
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if (query) {
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GHashTableIter iter;
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gpointer key, value;
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g_hash_table_iter_init (&iter, query);
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while (g_hash_table_iter_next (&iter, &key, &value)) {
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GST_INFO_OBJECT (self, "Setting property from URI: %s=%s", (gchar *) key,
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(gchar *) value);
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gst_util_set_object_arg (G_OBJECT (self), key, value);
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}
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}
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beach:
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UNLOCK (self);
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g_free (location);
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g_free (hostname);
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g_clear_pointer (&query, g_hash_table_unref);
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return ret;
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}
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static void
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gst_image_sequence_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_image_sequence_src_uri_get_type;
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iface->get_protocols = gst_image_sequence_src_uri_get_protocols;
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iface->get_uri = gst_image_sequence_src_uri_get_uri;
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iface->set_uri = gst_image_sequence_src_uri_set_uri;
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}
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#define gst_image_sequence_src_parent_class parent_class
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#define _do_init \
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G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_image_sequence_src_uri_handler_init); \
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GST_DEBUG_CATEGORY_INIT (gst_image_sequence_src_debug, "imagesequencesrc", \
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0, "imagesequencesrc element");
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G_DEFINE_TYPE_WITH_CODE (GstImageSequenceSrc, gst_image_sequence_src,
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GST_TYPE_PUSH_SRC, _do_init);
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static gboolean
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is_seekable (GstBaseSrc * src)
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{
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (src);
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if ((self->n_frames != 0) && (self->fps_n) && (self->fps_d))
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return TRUE;
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return FALSE;
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}
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static gboolean
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do_seek (GstBaseSrc * bsrc, GstSegment * segment)
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{
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GstImageSequenceSrc *self;
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self = GST_IMAGE_SEQUENCE_SRC (bsrc);
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self->reverse = segment->rate < 0;
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if (self->reverse) {
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segment->time = segment->start;
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}
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self->index =
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self->start_index +
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segment->position * self->fps_n / (self->fps_d * GST_SECOND);
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return TRUE;
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}
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static void
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gst_image_sequence_src_finalize (GObject * object)
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{
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (object);
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g_clear_pointer (&self->path, g_free);
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g_rec_mutex_clear (&self->fields_lock);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_image_sequence_src_dispose (GObject * object)
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{
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (object);
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gst_clear_caps (&self->caps);
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g_clear_pointer (&self->uri, gst_uri_unref);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_image_sequence_src_class_init (GstImageSequenceSrcClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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GstPushSrcClass *gstpushsrc_class = GST_PUSH_SRC_CLASS (klass);
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GstBaseSrcClass *gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
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gobject_class->set_property = gst_image_sequence_src_set_property;
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gobject_class->get_property = gst_image_sequence_src_get_property;
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g_object_class_install_property (gobject_class, PROP_LOCATION,
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g_param_spec_string ("location", "File Location",
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"Pattern to create file names of input files. File names are "
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"created by calling sprintf() with the pattern and the current "
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"index.", DEFAULT_LOCATION,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_START_INDEX,
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g_param_spec_int ("start-index", "Start Index",
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"Start value of index. The initial value of index can be set "
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"either by setting index or start-index. When the end of the loop "
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"is reached, the index will be set to the value start-index.",
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0, INT_MAX, DEFAULT_START_INDEX,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_STOP_INDEX,
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g_param_spec_int ("stop-index", "Stop Index",
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"Stop value of index. The special value -1 means no stop.",
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-1, INT_MAX, DEFAULT_STOP_INDEX,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_FRAMERATE,
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gst_param_spec_fraction ("framerate", "Framerate",
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"The output framerate.",
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1, 1, G_MAXINT, 1, DEFAULT_FRAMERATE, 1,
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G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
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gobject_class->finalize = gst_image_sequence_src_finalize;
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gobject_class->dispose = gst_image_sequence_src_dispose;
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gstbasesrc_class->get_caps = gst_image_sequence_src_getcaps;
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gstbasesrc_class->query = gst_image_sequence_src_query;
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gstbasesrc_class->is_seekable = is_seekable;
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gstbasesrc_class->do_seek = do_seek;
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gstpushsrc_class->create = gst_image_sequence_src_create;
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_image_sequence_src_pad_template);
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gst_element_class_set_static_metadata (gstelement_class,
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"Image Sequence Source", "Source/File/Video",
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"Create a video stream from a sequence of image files",
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"Cesar Fabian Orccon Chipana <cfoch.fabian@gmail.com>\n"
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"Thibault Saunier <tsaunier@igalia.com>");
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}
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static void
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gst_image_sequence_src_init (GstImageSequenceSrc * self)
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{
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GstBaseSrc *bsrc;
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GST_DEBUG_CATEGORY_INIT (gst_image_sequence_src_debug, "imagesequencesrc", 0,
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"imagesequencesrc element");
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bsrc = GST_BASE_SRC (self);
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gst_base_src_set_format (bsrc, GST_FORMAT_TIME);
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g_rec_mutex_init (&self->fields_lock);
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self->start_index = DEFAULT_START_INDEX;
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self->index = 0;
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self->stop_index = DEFAULT_STOP_INDEX;
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self->path = NULL;
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self->caps = NULL;
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self->n_frames = 0;
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self->fps_n = 30;
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self->fps_d = 1;
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}
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static GstCaps *
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gst_image_sequence_src_getcaps (GstBaseSrc * src, GstCaps * filter)
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{
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (src);
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GST_DEBUG_OBJECT (self, "returning %" GST_PTR_FORMAT, self->caps);
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if (filter) {
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if (self->caps)
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return gst_caps_intersect_full (filter, self->caps,
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GST_CAPS_INTERSECT_FIRST);
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else
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return gst_caps_ref (filter);
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}
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return gst_caps_new_any ();
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}
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static gboolean
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gst_image_sequence_src_query (GstBaseSrc * bsrc, GstQuery * query)
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{
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gboolean ret;
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GstImageSequenceSrc *self;
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self = GST_IMAGE_SEQUENCE_SRC (bsrc);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_DURATION:
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{
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GstFormat format;
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gst_query_parse_duration (query, &format, NULL);
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switch (format) {
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case GST_FORMAT_TIME:
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LOCK (self);
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if (self->n_frames <= 0) {
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gst_image_sequence_src_count_frames (self, FALSE);
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gst_image_sequence_src_set_duration (self);
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}
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if (self->n_frames > 0)
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gst_query_set_duration (query, format, self->duration);
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UNLOCK (self);
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ret = TRUE;
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break;
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default:
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ret = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
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}
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break;
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}
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default:
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ret = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
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break;
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}
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return ret;
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}
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static void
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gst_image_sequence_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (object);
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LOCK (self);
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switch (prop_id) {
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case PROP_LOCATION:
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gst_image_sequence_src_set_location (self, g_value_get_string (value));
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break;
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case PROP_START_INDEX:
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self->start_index = g_value_get_int (value);
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gst_image_sequence_src_count_frames (self, FALSE);
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break;
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case PROP_STOP_INDEX:
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self->stop_index = g_value_get_int (value);
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gst_image_sequence_src_count_frames (self, FALSE);
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break;
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case PROP_FRAMERATE:
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self->fps_n = gst_value_get_fraction_numerator (value);
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self->fps_d = gst_value_get_fraction_denominator (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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UNLOCK (self);
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}
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static void
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gst_image_sequence_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstImageSequenceSrc *self = GST_IMAGE_SEQUENCE_SRC (object);
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LOCK (self);
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switch (prop_id) {
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case PROP_LOCATION:
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g_value_set_string (value, self->path);
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break;
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case PROP_START_INDEX:
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g_value_set_int (value, self->start_index);
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break;
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case PROP_STOP_INDEX:
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g_value_set_int (value, self->stop_index);
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break;
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case PROP_FRAMERATE:
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self->fps_n = gst_value_get_fraction_numerator (value);
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self->fps_d = gst_value_get_fraction_denominator (value);
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GST_DEBUG_OBJECT (self, "Set (framerate) property to (%d/%d)",
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self->fps_n, self->fps_d);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
UNLOCK (self);
|
|
}
|
|
|
|
/* Call with LOCK */
|
|
static gint
|
|
gst_image_sequence_src_count_frames (GstImageSequenceSrc * self,
|
|
gboolean can_read)
|
|
{
|
|
if (can_read && self->stop_index < 0 && self->path) {
|
|
gint i;
|
|
|
|
for (i = self->start_index;; i++) {
|
|
gchar *filename = g_strdup_printf (self->path, i);
|
|
|
|
if (!g_file_test (filename, G_FILE_TEST_IS_REGULAR)) {
|
|
i--;
|
|
g_free (filename);
|
|
break;
|
|
}
|
|
|
|
g_free (filename);
|
|
}
|
|
if (i > self->start_index)
|
|
self->stop_index = i;
|
|
}
|
|
|
|
if (self->stop_index >= self->start_index)
|
|
self->n_frames = self->stop_index - self->start_index + 1;
|
|
return self->n_frames;
|
|
}
|
|
|
|
static void
|
|
gst_image_sequence_src_set_caps (GstImageSequenceSrc * self, GstCaps * caps)
|
|
{
|
|
GstCaps *new_caps;
|
|
|
|
g_assert (caps != NULL);
|
|
new_caps = gst_caps_copy (caps);
|
|
|
|
if (self->n_frames > 0) {
|
|
GValue fps = G_VALUE_INIT;
|
|
g_value_init (&fps, GST_TYPE_FRACTION);
|
|
gst_value_set_fraction (&fps, self->fps_n, self->fps_d);
|
|
gst_caps_set_value (new_caps, "framerate", &fps);
|
|
g_value_unset (&fps);
|
|
}
|
|
|
|
gst_caps_replace (&self->caps, new_caps);
|
|
gst_pad_set_caps (GST_BASE_SRC_PAD (self), new_caps);
|
|
|
|
GST_DEBUG_OBJECT (self, "Setting new caps: %" GST_PTR_FORMAT, new_caps);
|
|
}
|
|
|
|
/* Call with LOCK */
|
|
static void
|
|
gst_image_sequence_src_set_duration (GstImageSequenceSrc * self)
|
|
{
|
|
GstClockTime old_duration = self->duration;
|
|
|
|
if (self->n_frames <= 0)
|
|
return;
|
|
|
|
/* Calculate duration */
|
|
self->duration =
|
|
gst_util_uint64_scale (GST_SECOND * self->n_frames, self->fps_d,
|
|
self->fps_n);
|
|
|
|
if (self->duration != old_duration) {
|
|
UNLOCK (self);
|
|
gst_element_post_message (GST_ELEMENT (self),
|
|
gst_message_new_duration_changed (GST_OBJECT (self)));
|
|
LOCK (self);
|
|
}
|
|
}
|
|
|
|
/* Call with LOCK */
|
|
static gchar *
|
|
gst_image_sequence_src_get_filename (GstImageSequenceSrc * self)
|
|
{
|
|
gchar *filename;
|
|
|
|
GST_DEBUG ("Reading filename at index %d.", self->index);
|
|
filename = g_strdup_printf (self->path, self->index);
|
|
|
|
return filename;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_image_sequence_src_create (GstPushSrc * src, GstBuffer ** buffer)
|
|
{
|
|
GstImageSequenceSrc *self;
|
|
gsize size;
|
|
gchar *data;
|
|
gchar *filename;
|
|
GstBuffer *buf;
|
|
gboolean ret;
|
|
GError *error = NULL;
|
|
gint fps_n, fps_d, start_index, stop_index;
|
|
|
|
self = GST_IMAGE_SEQUENCE_SRC (src);
|
|
|
|
LOCK (self);
|
|
start_index = self->start_index;
|
|
stop_index = self->stop_index;
|
|
if (self->index > stop_index && stop_index > 0) {
|
|
UNLOCK (self);
|
|
|
|
return GST_FLOW_EOS;
|
|
}
|
|
|
|
if (self->index < self->start_index)
|
|
self->index = self->start_index;
|
|
|
|
g_assert (start_index <= self->index &&
|
|
(self->index <= stop_index || stop_index <= 0));
|
|
|
|
filename = gst_image_sequence_src_get_filename (self);
|
|
fps_n = self->fps_n;
|
|
fps_d = self->fps_d;
|
|
UNLOCK (self);
|
|
|
|
if (!filename)
|
|
goto handle_error;
|
|
|
|
ret = g_file_get_contents (filename, &data, &size, &error);
|
|
if (!ret)
|
|
goto handle_error;
|
|
|
|
buf = gst_buffer_new_wrapped_full (0, data, size, 0, size, NULL, g_free);
|
|
|
|
if (!self->caps) {
|
|
GstCaps *caps;
|
|
caps = gst_type_find_helper_for_buffer (NULL, buf, NULL);
|
|
if (!caps) {
|
|
GST_ELEMENT_ERROR (self, STREAM, TYPE_NOT_FOUND, (NULL),
|
|
("Could not determine image type."));
|
|
|
|
return GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
|
|
LOCK (self);
|
|
gst_image_sequence_src_count_frames (self, TRUE);
|
|
gst_image_sequence_src_set_duration (self);
|
|
UNLOCK (self);
|
|
|
|
gst_image_sequence_src_set_caps (self, caps);
|
|
gst_caps_unref (caps);
|
|
}
|
|
|
|
GST_BUFFER_PTS (buf) =
|
|
gst_util_uint64_scale_ceil ((self->index - start_index) * GST_SECOND,
|
|
fps_d, fps_n);
|
|
GST_BUFFER_DURATION (buf) = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n);
|
|
GST_BUFFER_OFFSET (buf) = self->index - start_index;
|
|
GST_LOG_OBJECT (self, "index: %d, %s - %" GST_PTR_FORMAT, self->index,
|
|
filename, buf);
|
|
|
|
g_free (filename);
|
|
*buffer = buf;
|
|
|
|
self->index += self->reverse ? -1 : 1;
|
|
return GST_FLOW_OK;
|
|
|
|
handle_error:
|
|
{
|
|
if (error != NULL) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, READ,
|
|
("Error while reading from file \"%s\".", filename),
|
|
("%s", error->message));
|
|
g_error_free (error);
|
|
} else {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, READ,
|
|
("Error while reading from file \"%s\".", filename),
|
|
("%s", g_strerror (errno)));
|
|
}
|
|
g_free (filename);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|