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671 lines
18 KiB
C
671 lines
18 KiB
C
/* GStreamer Split File Source
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* Copyright (C) 2011 Collabora Ltd. <tim.muller@collabora.co.uk>
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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:element-splitfilesrc
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* @see_also: #GstFileSrc, #GstMultiFileSrc
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*
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* Reads data from multiple files, presenting those files as one continuous
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* file to downstream elements. This is useful for reading a large file that
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* had to be split into multiple parts due to filesystem file size limitations,
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* for example.
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*
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* The files to select are chosen via the location property, which supports
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* (and expects) shell-style wildcards (but only for the filename, not for
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* directories). The results will be sorted.
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*
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* <refsect2>
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* <title>Example launch lines</title>
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* |[
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* gst-launch-1.0 splitfilesrc location="/path/to/part-*.mpg" ! decodebin ! ...
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* ]| Plays the different parts as if they were one single MPEG file.
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* |[
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* gst-launch-1.0 playbin uri="splitfile://path/to/foo.avi.*"
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* ]| Plays the different parts as if they were one single AVI file.
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* </refsect2>
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*
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* Since: 0.10.31
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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 "gstsplitfilesrc.h"
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#include "patternspec.h"
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#include <string.h>
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#ifdef G_OS_WIN32
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#define DEFAULT_PATTERN_MATCH_MODE MATCH_MODE_UTF8
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#else
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#define DEFAULT_PATTERN_MATCH_MODE MATCH_MODE_AUTO
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#endif
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enum
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{
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PROP_LOCATION = 1
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};
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#define DEFAULT_LOCATION NULL
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static void gst_split_file_src_uri_handler_init (gpointer g_iface,
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gpointer iface_data);
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static void gst_split_file_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_split_file_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_split_file_src_finalize (GObject * obj);
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static gboolean gst_split_file_src_start (GstBaseSrc * basesrc);
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static gboolean gst_split_file_src_stop (GstBaseSrc * basesrc);
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static gboolean gst_split_file_src_can_seek (GstBaseSrc * basesrc);
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static gboolean gst_split_file_src_get_size (GstBaseSrc * basesrc, guint64 * s);
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static gboolean gst_split_file_src_unlock (GstBaseSrc * basesrc);
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static GstFlowReturn gst_split_file_src_create (GstBaseSrc * basesrc,
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guint64 offset, guint size, GstBuffer ** buffer);
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static GstStaticPadTemplate gst_split_file_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 (splitfilesrc_debug);
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#define GST_CAT_DEFAULT splitfilesrc_debug
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G_DEFINE_TYPE_WITH_CODE (GstSplitFileSrc, gst_split_file_src, GST_TYPE_BASE_SRC,
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G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER,
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gst_split_file_src_uri_handler_init));
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#ifdef G_OS_WIN32
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#define WIN32_BLURB " Location string must be in UTF-8 encoding (on Windows)."
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#else
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#define WIN32_BLURB /* nothing */
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#endif
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static void
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gst_split_file_src_class_init (GstSplitFileSrcClass * klass)
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{
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GstBaseSrcClass *gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->set_property = gst_split_file_src_set_property;
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gobject_class->get_property = gst_split_file_src_get_property;
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gobject_class->finalize = gst_split_file_src_finalize;
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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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"Wildcard pattern to match file names of the input files. If "
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"the location is an absolute path or contains directory components, "
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"only the base file name part will be considered for pattern "
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"matching. The results will be sorted." WIN32_BLURB,
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DEFAULT_LOCATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_split_file_src_start);
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gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_split_file_src_stop);
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gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_split_file_src_create);
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gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_split_file_src_get_size);
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gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_split_file_src_unlock);
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gstbasesrc_class->is_seekable =
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GST_DEBUG_FUNCPTR (gst_split_file_src_can_seek);
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GST_DEBUG_CATEGORY_INIT (splitfilesrc_debug, "splitfilesrc", 0,
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"splitfilesrc element");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_split_file_src_pad_template));
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gst_element_class_set_static_metadata (gstelement_class, "Split-File Source",
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"Source/File",
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"Read a sequentially named set of files as if it was one large file",
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"Tim-Philipp Müller <tim.muller@collabora.co.uk>");
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}
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static void
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gst_split_file_src_init (GstSplitFileSrc * splitfilesrc)
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{
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}
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static void
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gst_split_file_src_finalize (GObject * obj)
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{
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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (obj);
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g_free (src->location);
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src->location = NULL;
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G_OBJECT_CLASS (gst_split_file_src_parent_class)->finalize (obj);
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}
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static gboolean
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gst_split_file_src_can_seek (GstBaseSrc * basesrc)
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{
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return TRUE;
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}
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static gboolean
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gst_split_file_src_unlock (GstBaseSrc * basesrc)
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{
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/* This is not actually that useful, since all normal file
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* operations are fully blocking anyway */
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#if 0
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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (basesrc);
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GST_DEBUG_OBJECT (src, "cancelling pending I/O operation if there is one");
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/* g_cancellable_cancel (src->cancellable); */
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GST_DEBUG_OBJECT (src, "done");
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#endif
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return TRUE;
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}
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static gboolean
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gst_split_file_src_get_size (GstBaseSrc * basesrc, guint64 * size)
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{
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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (basesrc);
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*size = src->parts[src->num_parts - 1].stop + 1;
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return TRUE;
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}
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static void
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gst_split_file_src_set_location (GstSplitFileSrc * src, const char *location)
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{
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GST_OBJECT_LOCK (src);
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g_free (src->location);
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if (location != NULL && g_str_has_prefix (location, "splitfile://"))
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src->location = gst_uri_get_location (location);
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else
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src->location = g_strdup (location);
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#ifdef G_OS_WIN32
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if (!g_utf8_validate (src->location, -1, NULL)) {
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g_warning ("splitfilesrc 'location' property must be in UTF-8 "
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"encoding on Windows");
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}
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#endif
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GST_OBJECT_UNLOCK (src);
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}
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static void
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gst_split_file_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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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (object);
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switch (prop_id) {
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case PROP_LOCATION:
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gst_split_file_src_set_location (src, g_value_get_string (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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}
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static void
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gst_split_file_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (object);
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switch (prop_id) {
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case PROP_LOCATION:
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GST_OBJECT_LOCK (src);
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g_value_set_string (value, src->location);
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GST_OBJECT_UNLOCK (src);
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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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}
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static int
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gst_split_file_src_array_sortfunc (gchar ** a, gchar ** b)
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{
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return strcmp (*a, *b);
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}
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static gchar **
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gst_split_file_src_find_files (GstSplitFileSrc * src, const gchar * dirname,
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const gchar * basename, GError ** err)
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{
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PatternSpec *pspec;
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GPtrArray *files;
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const gchar *name;
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GDir *dir;
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if (dirname == NULL || basename == NULL)
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goto invalid_location;
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GST_INFO_OBJECT (src, "checking in directory '%s' for pattern '%s'",
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dirname, basename);
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dir = g_dir_open (dirname, 0, err);
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if (dir == NULL)
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return NULL;
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if (DEFAULT_PATTERN_MATCH_MODE == MATCH_MODE_UTF8 &&
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!g_utf8_validate (basename, -1, NULL)) {
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goto not_utf8;
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}
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/* mode will be AUTO on linux/unix and UTF8 on win32 */
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pspec = pattern_spec_new (basename, DEFAULT_PATTERN_MATCH_MODE);
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files = g_ptr_array_new ();
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while ((name = g_dir_read_name (dir))) {
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GST_TRACE_OBJECT (src, "check: %s", name);
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if (pattern_match_string (pspec, name)) {
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GST_DEBUG_OBJECT (src, "match: %s", name);
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g_ptr_array_add (files, g_build_filename (dirname, name, NULL));
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}
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}
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if (files->len == 0)
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goto no_matches;
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g_ptr_array_sort (files, (GCompareFunc) gst_split_file_src_array_sortfunc);
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g_ptr_array_add (files, NULL);
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pattern_spec_free (pspec);
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g_dir_close (dir);
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return (gchar **) g_ptr_array_free (files, FALSE);
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/* ERRORS */
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invalid_location:
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{
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g_set_error_literal (err, G_FILE_ERROR, G_FILE_ERROR_INVAL,
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"No filename specified.");
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return NULL;
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}
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not_utf8:
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{
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g_dir_close (dir);
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g_set_error_literal (err, G_FILE_ERROR, G_FILE_ERROR_INVAL,
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"Filename pattern must be UTF-8 on Windows.");
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return NULL;
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}
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no_matches:
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{
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pattern_spec_free (pspec);
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g_dir_close (dir);
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g_set_error_literal (err, G_FILE_ERROR, G_FILE_ERROR_NOENT,
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"Found no files matching the pattern.");
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return NULL;
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}
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}
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static gboolean
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gst_split_file_src_start (GstBaseSrc * basesrc)
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{
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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (basesrc);
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GCancellable *cancel;
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gboolean ret = FALSE;
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guint64 offset;
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GError *err = NULL;
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gchar *basename = NULL;
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gchar *dirname = NULL;
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gchar **files;
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guint i;
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GST_OBJECT_LOCK (src);
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if (src->location != NULL && src->location[0] != '\0') {
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basename = g_path_get_basename (src->location);
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dirname = g_path_get_dirname (src->location);
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}
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GST_OBJECT_UNLOCK (src);
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files = gst_split_file_src_find_files (src, dirname, basename, &err);
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if (files == NULL || *files == NULL)
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goto no_files;
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src->num_parts = g_strv_length (files);
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src->parts = g_new0 (GstFilePart, src->num_parts);
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cancel = src->cancellable;
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offset = 0;
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for (i = 0; i < src->num_parts; ++i) {
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GFileInputStream *stream;
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GFileInfo *info;
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goffset size;
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GFile *file;
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file = g_file_new_for_path (files[i]);
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stream = g_file_read (file, cancel, &err);
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g_object_unref (file);
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if (err != NULL)
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goto open_read_error;
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info = g_file_input_stream_query_info (stream, "standard::*", NULL, &err);
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if (err != NULL) {
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g_object_unref (stream);
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goto query_info_error;
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}
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size = g_file_info_get_size (info);
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g_object_unref (info);
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src->parts[i].stream = stream;
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src->parts[i].path = g_strdup (files[i]);
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src->parts[i].start = offset;
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src->parts[i].stop = offset + size - 1;
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GST_DEBUG ("[%010" G_GUINT64_FORMAT "-%010" G_GUINT64_FORMAT "] %s",
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src->parts[i].start, src->parts[i].stop, src->parts[i].path);
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offset += size;
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}
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GST_INFO ("Successfully opened %u file parts for reading", src->num_parts);
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src->cur_part = 0;
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src->cancellable = g_cancellable_new ();
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ret = TRUE;
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done:
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if (err != NULL)
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g_error_free (err);
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g_strfreev (files);
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g_free (basename);
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g_free (dirname);
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return ret;
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/* ERRORS */
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no_files:
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{
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if (err->code == G_IO_ERROR_CANCELLED)
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goto cancelled;
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, ("%s", err->message),
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("Failed to find files in '%s' for pattern '%s'",
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GST_STR_NULL (dirname), GST_STR_NULL (basename)));
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goto done;
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}
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open_read_error:
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{
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if (err->code == G_IO_ERROR_CANCELLED)
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goto cancelled;
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, ("%s", err->message),
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("Failed to open file '%s' for reading", files[i]));
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goto done;
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}
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query_info_error:
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{
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if (err->code == G_IO_ERROR_CANCELLED)
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goto cancelled;
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, ("%s", err->message),
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("Failed to query info for file '%s'", files[i]));
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goto done;
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}
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cancelled:
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{
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GST_DEBUG_OBJECT (src, "I/O operation cancelled from another thread");
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goto done;
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}
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}
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static gboolean
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gst_split_file_src_stop (GstBaseSrc * basesrc)
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{
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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (basesrc);
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guint i;
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for (i = 0; i < src->num_parts; ++i) {
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if (src->parts[i].stream != NULL)
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g_object_unref (src->parts[i].stream);
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g_free (src->parts[i].path);
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}
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g_free (src->parts);
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src->parts = NULL;
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src->num_parts = 0;
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g_object_unref (src->cancellable);
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src->cancellable = NULL;
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return TRUE;
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}
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static gboolean
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gst_split_file_src_find_part_for_offset (GstSplitFileSrc * src, guint64 offset,
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guint * part_number)
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{
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GstFilePart *part;
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guint i;
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/* TODO: could use gst_util_array_binary_search() here */
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part = src->parts;
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for (i = 0; i < src->num_parts; ++i) {
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if (offset >= part->start && offset <= part->stop) {
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*part_number = i;
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return TRUE;
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}
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++part;
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}
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return FALSE;
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}
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static GstFlowReturn
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gst_split_file_src_create (GstBaseSrc * basesrc, guint64 offset, guint size,
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GstBuffer ** buffer)
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{
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GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (basesrc);
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GstFilePart cur_part;
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GInputStream *stream;
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GCancellable *cancel;
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GSeekable *seekable;
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GstBuffer *buf;
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GError *err = NULL;
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guint64 read_offset;
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GstMapInfo map;
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guint8 *data;
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guint to_read;
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cur_part = src->parts[src->cur_part];
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if (offset < cur_part.start || offset > cur_part.stop) {
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if (!gst_split_file_src_find_part_for_offset (src, offset, &src->cur_part))
|
|
return GST_FLOW_EOS;
|
|
cur_part = src->parts[src->cur_part];
|
|
}
|
|
|
|
GST_LOG_OBJECT (src, "current part: %u (%" G_GUINT64_FORMAT " - "
|
|
"%" G_GUINT64_FORMAT ", %s)", src->cur_part, cur_part.start,
|
|
cur_part.stop, cur_part.path);
|
|
|
|
buf = gst_buffer_new_allocate (NULL, size, NULL);
|
|
|
|
GST_BUFFER_OFFSET (buf) = offset;
|
|
|
|
gst_buffer_map (buf, &map, GST_MAP_WRITE);
|
|
data = map.data;
|
|
|
|
cancel = src->cancellable;
|
|
|
|
while (size > 0) {
|
|
guint64 bytes_to_end_of_part;
|
|
gsize read = 0;
|
|
|
|
/* we want the offset into the file part */
|
|
read_offset = offset - cur_part.start;
|
|
|
|
GST_LOG ("Reading part %03u from offset %" G_GUINT64_FORMAT " (%s)",
|
|
src->cur_part, read_offset, cur_part.path);
|
|
|
|
/* FIXME: only seek when needed (hopefully gio is smart) */
|
|
seekable = G_SEEKABLE (cur_part.stream);
|
|
if (!g_seekable_seek (seekable, read_offset, G_SEEK_SET, cancel, &err))
|
|
goto seek_failed;
|
|
|
|
GST_LOG_OBJECT (src, "now: %" G_GUINT64_FORMAT, g_seekable_tell (seekable));
|
|
|
|
bytes_to_end_of_part = (cur_part.stop - cur_part.start) + 1 - read_offset;
|
|
to_read = MIN (size, bytes_to_end_of_part);
|
|
|
|
GST_LOG_OBJECT (src, "reading %u bytes from part %u (bytes to end of "
|
|
"part: %u)", to_read, src->cur_part, (guint) bytes_to_end_of_part);
|
|
|
|
stream = G_INPUT_STREAM (cur_part.stream);
|
|
|
|
/* NB: we won't try to read beyond EOF */
|
|
if (!g_input_stream_read_all (stream, data, to_read, &read, cancel, &err))
|
|
goto read_failed;
|
|
|
|
GST_LOG_OBJECT (src, "read %u bytes", (guint) read);
|
|
|
|
data += read;
|
|
size -= read;
|
|
offset += read;
|
|
|
|
/* are we done? */
|
|
if (size == 0)
|
|
break;
|
|
|
|
GST_LOG_OBJECT (src, "%u bytes left to read for this chunk", size);
|
|
|
|
/* corner case, this should never really happen (assuming basesrc clips
|
|
* requests beyond the file size) */
|
|
if (read < to_read) {
|
|
if (src->cur_part == src->num_parts - 1) {
|
|
/* last file part, stop reading and truncate buffer */
|
|
gst_buffer_set_size (buf, offset - GST_BUFFER_OFFSET (buf));
|
|
break;
|
|
} else {
|
|
goto file_part_changed;
|
|
}
|
|
}
|
|
|
|
++src->cur_part;
|
|
cur_part = src->parts[src->cur_part];
|
|
}
|
|
|
|
GST_BUFFER_OFFSET_END (buf) = offset;
|
|
|
|
gst_buffer_unmap (buf, &map);
|
|
|
|
*buffer = buf;
|
|
GST_LOG_OBJECT (src, "read %" G_GSIZE_FORMAT " bytes into buf %p",
|
|
gst_buffer_get_size (buf), buf);
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
seek_failed:
|
|
{
|
|
if (err->code == G_IO_ERROR_CANCELLED)
|
|
goto cancelled;
|
|
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SEEK, (NULL),
|
|
("Seek to %" G_GUINT64_FORMAT " in %s failed", read_offset,
|
|
cur_part.path));
|
|
g_error_free (err);
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
read_failed:
|
|
{
|
|
if (err->code == G_IO_ERROR_CANCELLED)
|
|
goto cancelled;
|
|
|
|
GST_ELEMENT_ERROR (src, RESOURCE, READ, ("%s", err->message),
|
|
("Read from %" G_GUINT64_FORMAT " in %s failed", read_offset,
|
|
cur_part.path));
|
|
g_error_free (err);
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
file_part_changed:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, READ,
|
|
("Read error while reading file part %s", cur_part.path),
|
|
("Short read in file part, file may have been modified since start"));
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
cancelled:
|
|
{
|
|
GST_DEBUG_OBJECT (src, "I/O operation cancelled from another thread");
|
|
g_error_free (err);
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
}
|
|
|
|
static guint
|
|
gst_split_file_src_uri_get_type (GType type)
|
|
{
|
|
return GST_URI_SRC;
|
|
}
|
|
|
|
static const gchar *const *
|
|
gst_split_file_src_uri_get_protocols (GType type)
|
|
{
|
|
static const gchar *protocols[] = { "splitfile", NULL };
|
|
|
|
return (const gchar * const *) protocols;
|
|
}
|
|
|
|
static gchar *
|
|
gst_split_file_src_uri_get_uri (GstURIHandler * handler)
|
|
{
|
|
GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (handler);
|
|
gchar *ret;
|
|
|
|
GST_OBJECT_LOCK (src);
|
|
if (src->location != NULL)
|
|
ret = g_strdup_printf ("splitfile://%s", src->location);
|
|
else
|
|
ret = NULL;
|
|
GST_OBJECT_UNLOCK (src);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_split_file_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
|
|
GError ** error)
|
|
{
|
|
GstSplitFileSrc *src = GST_SPLIT_FILE_SRC (handler);
|
|
|
|
gst_split_file_src_set_location (src, uri);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_split_file_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
|
|
{
|
|
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
|
|
|
|
iface->get_type = gst_split_file_src_uri_get_type;
|
|
iface->get_protocols = gst_split_file_src_uri_get_protocols;
|
|
iface->get_uri = gst_split_file_src_uri_get_uri;
|
|
iface->set_uri = gst_split_file_src_uri_set_uri;
|
|
}
|