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355 lines
10 KiB
C
355 lines
10 KiB
C
/* GStreamer
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* Copyright (C) 2006 David A. Schleef <ds@schleef.org>
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*
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* gstmultifilesrc.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-multifilesrc
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* @see_also: #GstFileSrc
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*
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* Reads buffers from sequentially named files. If used together with an image
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* decoder, one needs to use the #GstMultiFileSrc:caps property or a capsfilter
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* to force to caps containing a framerate. Otherwise image decoders send EOS
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* after the first picture.
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*
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* File names are created by replacing "%%d" with the index using printf().
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch multifilesrc location="img.%04d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! \
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* pngdec ! ffmpegcolorspace ! theoraenc ! oggmux ! \
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* filesink location="images.ogg"
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* ]| This pipeline creates a video file "images.ogg" by joining multiple PNG
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* files named img.0000.png, img.0001.png, etc.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "gstmultifilesrc.h"
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static GstFlowReturn gst_multi_file_src_create (GstPushSrc * src,
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GstBuffer ** buffer);
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static void gst_multi_file_src_dispose (GObject * object);
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static void gst_multi_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_multi_file_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstCaps *gst_multi_file_src_getcaps (GstBaseSrc * src);
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static gboolean gst_multi_file_src_query (GstBaseSrc * src, GstQuery * query);
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static GstStaticPadTemplate gst_multi_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 (gst_multi_file_src_debug);
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#define GST_CAT_DEFAULT gst_multi_file_src_debug
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static const GstElementDetails gst_multi_file_src_details =
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GST_ELEMENT_DETAILS ("Multi-File Source",
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"Source/File",
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"Read a sequentially named set of files into buffers",
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"David Schleef <ds@schleef.org>");
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enum
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{
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ARG_0,
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ARG_LOCATION,
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ARG_INDEX,
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ARG_CAPS
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};
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#define DEFAULT_LOCATION "%05d"
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#define DEFAULT_INDEX 0
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GST_BOILERPLATE (GstMultiFileSrc, gst_multi_file_src, GstPushSrc,
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GST_TYPE_PUSH_SRC);
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static void
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gst_multi_file_src_base_init (gpointer g_class)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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GST_DEBUG_CATEGORY_INIT (gst_multi_file_src_debug, "multifilesrc", 0,
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"multifilesrc element");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_multi_file_src_pad_template));
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gst_element_class_set_details (gstelement_class, &gst_multi_file_src_details);
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}
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static void
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gst_multi_file_src_class_init (GstMultiFileSrcClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_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_multi_file_src_set_property;
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gobject_class->get_property = gst_multi_file_src_get_property;
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g_object_class_install_property (gobject_class, ARG_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, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_INDEX,
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g_param_spec_int ("index", "File Index",
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"Index to use with location property to create file names. The "
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"index is incremented by one for each buffer read.",
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0, INT_MAX, DEFAULT_INDEX, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_CAPS,
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g_param_spec_boxed ("caps", "Caps",
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"Caps describing the format of the data.",
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GST_TYPE_CAPS, G_PARAM_READWRITE));
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gobject_class->dispose = gst_multi_file_src_dispose;
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gstbasesrc_class->get_caps = gst_multi_file_src_getcaps;
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gstbasesrc_class->query = gst_multi_file_src_query;
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gstpushsrc_class->create = gst_multi_file_src_create;
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if (sizeof (off_t) < 8) {
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GST_LOG ("No large file support, sizeof (off_t) = %" G_GSIZE_FORMAT,
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sizeof (off_t));
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}
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}
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static void
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gst_multi_file_src_init (GstMultiFileSrc * multifilesrc,
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GstMultiFileSrcClass * g_class)
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{
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multifilesrc->index = DEFAULT_INDEX;
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multifilesrc->filename = g_strdup (DEFAULT_LOCATION);
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multifilesrc->successful_read = FALSE;
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}
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static void
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gst_multi_file_src_dispose (GObject * object)
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{
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GstMultiFileSrc *src = GST_MULTI_FILE_SRC (object);
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g_free (src->filename);
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src->filename = NULL;
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if (src->caps)
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gst_caps_unref (src->caps);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static GstCaps *
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gst_multi_file_src_getcaps (GstBaseSrc * src)
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{
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GstMultiFileSrc *multi_file_src = GST_MULTI_FILE_SRC (src);
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GST_DEBUG_OBJECT (src, "returning %" GST_PTR_FORMAT, multi_file_src->caps);
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if (multi_file_src->caps) {
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return gst_caps_ref (multi_file_src->caps);
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} else {
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return gst_caps_new_any ();
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}
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}
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static gboolean
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gst_multi_file_src_query (GstBaseSrc * src, GstQuery * query)
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{
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gboolean res;
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GstMultiFileSrc *mfsrc;
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mfsrc = GST_MULTI_FILE_SRC (src);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_POSITION:
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{
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GstFormat format;
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gst_query_parse_position (query, &format, NULL);
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switch (format) {
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case GST_FORMAT_BUFFERS:
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case GST_FORMAT_DEFAULT:
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gst_query_set_position (query, GST_FORMAT_BUFFERS, mfsrc->index);
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res = TRUE;
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break;
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default:
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res = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
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break;
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}
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break;
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}
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default:
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res = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
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break;
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}
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return res;
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}
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static gboolean
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gst_multi_file_src_set_location (GstMultiFileSrc * src, const gchar * location)
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{
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g_free (src->filename);
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if (location != NULL) {
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src->filename = g_strdup (location);
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} else {
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src->filename = NULL;
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}
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return TRUE;
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}
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static void
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gst_multi_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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GstMultiFileSrc *src = GST_MULTI_FILE_SRC (object);
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switch (prop_id) {
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case ARG_LOCATION:
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gst_multi_file_src_set_location (src, g_value_get_string (value));
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break;
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case ARG_INDEX:
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src->index = g_value_get_int (value);
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break;
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case ARG_CAPS:
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{
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const GstCaps *caps = gst_value_get_caps (value);
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GstCaps *new_caps;
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if (caps == NULL) {
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new_caps = gst_caps_new_any ();
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} else {
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new_caps = gst_caps_copy (caps);
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}
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gst_caps_replace (&src->caps, new_caps);
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gst_pad_set_caps (GST_BASE_SRC_PAD (src), new_caps);
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}
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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_multi_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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GstMultiFileSrc *src = GST_MULTI_FILE_SRC (object);
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switch (prop_id) {
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case ARG_LOCATION:
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g_value_set_string (value, src->filename);
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break;
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case ARG_INDEX:
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g_value_set_int (value, src->index);
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break;
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case ARG_CAPS:
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gst_value_set_caps (value, src->caps);
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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 gchar *
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gst_multi_file_src_get_filename (GstMultiFileSrc * multifilesrc)
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{
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gchar *filename;
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filename = g_strdup_printf (multifilesrc->filename, multifilesrc->index);
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return filename;
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}
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static GstFlowReturn
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gst_multi_file_src_create (GstPushSrc * src, GstBuffer ** buffer)
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{
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GstMultiFileSrc *multifilesrc;
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gsize size;
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gchar *data;
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gchar *filename;
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GstBuffer *buf;
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gboolean ret;
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GError *error = NULL;
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multifilesrc = GST_MULTI_FILE_SRC (src);
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filename = gst_multi_file_src_get_filename (multifilesrc);
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GST_DEBUG_OBJECT (multifilesrc, "reading from file \"%s\".", filename);
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ret = g_file_get_contents (filename, &data, &size, &error);
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if (!ret) {
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if (multifilesrc->successful_read) {
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/* If we've read at least one buffer successfully, not finding the
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* next file is EOS. */
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g_free (filename);
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if (error != NULL)
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g_error_free (error);
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return GST_FLOW_UNEXPECTED;
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} else {
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goto handle_error;
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}
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}
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multifilesrc->successful_read = TRUE;
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multifilesrc->index++;
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buf = gst_buffer_new ();
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GST_BUFFER_DATA (buf) = (unsigned char *) data;
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GST_BUFFER_MALLOCDATA (buf) = GST_BUFFER_DATA (buf);
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GST_BUFFER_SIZE (buf) = size;
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GST_BUFFER_OFFSET (buf) = multifilesrc->offset;
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GST_BUFFER_OFFSET_END (buf) = multifilesrc->offset + size;
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multifilesrc->offset += size;
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gst_buffer_set_caps (buf, multifilesrc->caps);
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GST_DEBUG_OBJECT (multifilesrc, "read file \"%s\".", filename);
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g_free (filename);
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*buffer = buf;
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return GST_FLOW_OK;
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handle_error:
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{
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if (error != NULL) {
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GST_ELEMENT_ERROR (multifilesrc, RESOURCE, READ,
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("Error while reading from file \"%s\".", filename),
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("%s", error->message));
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g_error_free (error);
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} else {
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GST_ELEMENT_ERROR (multifilesrc, RESOURCE, READ,
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("Error while reading from file \"%s\".", filename),
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("%s", g_strerror (errno)));
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}
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g_free (filename);
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return GST_FLOW_ERROR;
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}
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}
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