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575 lines
16 KiB
C
575 lines
16 KiB
C
/* GStreamer GdkPixbuf-based image decoder
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* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
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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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#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/video/video.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <string.h>
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#include "gstgdkpixbufdec.h"
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GST_DEBUG_CATEGORY_STATIC (gdkpixbufdec_debug);
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#define GST_CAT_DEFAULT gdkpixbufdec_debug
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static GstStaticPadTemplate gst_gdk_pixbuf_dec_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("image/png; "
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/* "image/jpeg; " disabled because we can't handle MJPEG */
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/*"image/gif; " disabled because we can't handle animated gifs */
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"image/x-icon; "
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"application/x-navi-animation; "
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"image/x-cmu-raster; "
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"image/x-sun-raster; "
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"image/x-pixmap; "
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"image/tiff; "
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"image/x-portable-anymap; "
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"image/x-portable-bitmap; "
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"image/x-portable-graymap; "
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"image/x-portable-pixmap; "
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"image/bmp; "
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"image/x-bmp; "
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"image/x-MS-bmp; "
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"image/vnd.wap.wbmp; " "image/x-bitmap; " "image/x-tga; "
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"image/x-pcx; image/svg; image/svg+xml")
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);
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static GstStaticPadTemplate gst_gdk_pixbuf_dec_src_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 (GST_VIDEO_CAPS_MAKE ("RGB") "; "
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GST_VIDEO_CAPS_MAKE ("RGBA"))
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);
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static GstStateChangeReturn
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gst_gdk_pixbuf_dec_change_state (GstElement * element,
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GstStateChange transition);
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static GstFlowReturn gst_gdk_pixbuf_dec_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buffer);
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static gboolean gst_gdk_pixbuf_dec_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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#define gst_gdk_pixbuf_dec_parent_class parent_class
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G_DEFINE_TYPE (GstGdkPixbufDec, gst_gdk_pixbuf_dec, GST_TYPE_ELEMENT);
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static gboolean
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gst_gdk_pixbuf_dec_sink_setcaps (GstGdkPixbufDec * filter, GstCaps * caps)
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{
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const GValue *framerate;
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GstStructure *s;
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s = gst_caps_get_structure (caps, 0);
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if ((framerate = gst_structure_get_value (s, "framerate")) != NULL) {
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filter->in_fps_n = gst_value_get_fraction_numerator (framerate);
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filter->in_fps_d = gst_value_get_fraction_denominator (framerate);
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GST_DEBUG_OBJECT (filter, "got framerate of %d/%d fps => packetized mode",
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filter->in_fps_n, filter->in_fps_d);
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} else {
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filter->in_fps_n = 0;
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filter->in_fps_d = 1;
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GST_DEBUG_OBJECT (filter, "no framerate, assuming single image");
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}
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return TRUE;
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}
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static GstCaps *
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gst_gdk_pixbuf_dec_get_capslist (GstCaps * filter)
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{
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GSList *slist;
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GSList *slist0;
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GstCaps *capslist = NULL;
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GstCaps *return_caps = NULL;
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GstCaps *tmpl_caps;
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capslist = gst_caps_new_empty ();
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slist0 = gdk_pixbuf_get_formats ();
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for (slist = slist0; slist; slist = g_slist_next (slist)) {
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GdkPixbufFormat *pixbuf_format;
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char **mimetypes;
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char **mimetype;
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pixbuf_format = slist->data;
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mimetypes = gdk_pixbuf_format_get_mime_types (pixbuf_format);
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for (mimetype = mimetypes; *mimetype; mimetype++) {
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gst_caps_append_structure (capslist, gst_structure_new_empty (*mimetype));
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}
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g_strfreev (mimetypes);
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}
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g_slist_free (slist0);
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tmpl_caps =
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gst_static_caps_get (&gst_gdk_pixbuf_dec_sink_template.static_caps);
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return_caps = gst_caps_intersect (capslist, tmpl_caps);
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gst_caps_unref (tmpl_caps);
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gst_caps_unref (capslist);
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if (filter && return_caps) {
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GstCaps *temp;
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temp = gst_caps_intersect (return_caps, filter);
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gst_caps_unref (return_caps);
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return_caps = temp;
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}
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return return_caps;
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}
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static gboolean
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gst_gdk_pixbuf_dec_sink_query (GstPad * pad, GstObject * parent,
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GstQuery * query)
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{
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gboolean res;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CAPS:
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{
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GstCaps *filter, *caps;
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gst_query_parse_caps (query, &filter);
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caps = gst_gdk_pixbuf_dec_get_capslist (filter);
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gst_query_set_caps_result (query, caps);
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gst_caps_unref (caps);
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res = TRUE;
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break;
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}
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default:
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res = gst_pad_query_default (pad, parent, query);
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break;
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}
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return res;
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}
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/* initialize the plugin's class */
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static void
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gst_gdk_pixbuf_dec_class_init (GstGdkPixbufDecClass * klass)
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{
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GstElementClass *gstelement_class;
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gstelement_class = (GstElementClass *) klass;
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_dec_change_state);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_gdk_pixbuf_dec_src_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_gdk_pixbuf_dec_sink_template);
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gst_element_class_set_static_metadata (gstelement_class,
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"GdkPixbuf image decoder", "Codec/Decoder/Image",
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"Decodes images in a video stream using GdkPixbuf",
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"David A. Schleef <ds@schleef.org>, Renato Filho <renato.filho@indt.org.br>");
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GST_DEBUG_CATEGORY_INIT (gdkpixbufdec_debug, "gdkpixbuf", 0,
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"GdkPixbuf image decoder");
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}
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static void
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gst_gdk_pixbuf_dec_init (GstGdkPixbufDec * filter)
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{
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filter->sinkpad =
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gst_pad_new_from_static_template (&gst_gdk_pixbuf_dec_sink_template,
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"sink");
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gst_pad_set_query_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_dec_sink_query));
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gst_pad_set_chain_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_dec_chain));
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gst_pad_set_event_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_dec_sink_event));
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gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
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filter->srcpad =
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gst_pad_new_from_static_template (&gst_gdk_pixbuf_dec_src_template,
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"src");
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gst_pad_use_fixed_caps (filter->srcpad);
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gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
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filter->last_timestamp = GST_CLOCK_TIME_NONE;
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filter->pixbuf_loader = NULL;
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filter->packetized = FALSE;
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}
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static gboolean
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gst_gdk_pixbuf_dec_setup_pool (GstGdkPixbufDec * filter, GstVideoInfo * info)
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{
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GstCaps *target;
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GstQuery *query;
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GstBufferPool *pool;
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GstStructure *config;
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guint size, min, max;
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target = gst_pad_get_current_caps (filter->srcpad);
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if (!target)
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return FALSE;
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/* try to get a bufferpool now */
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/* find a pool for the negotiated caps now */
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query = gst_query_new_allocation (target, TRUE);
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if (!gst_pad_peer_query (filter->srcpad, query)) {
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/* not a problem, we use the query defaults */
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GST_DEBUG_OBJECT (filter, "ALLOCATION query failed");
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}
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if (gst_query_get_n_allocation_pools (query) > 0) {
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/* we got configuration from our peer, parse them */
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gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
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} else {
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pool = NULL;
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size = info->size;
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min = max = 0;
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}
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gst_query_unref (query);
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if (pool == NULL) {
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/* we did not get a pool, make one ourselves then */
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pool = gst_buffer_pool_new ();
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}
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/* and configure */
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_set_params (config, target, size, min, max);
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gst_buffer_pool_set_config (pool, config);
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if (filter->pool) {
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gst_buffer_pool_set_active (filter->pool, FALSE);
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gst_object_unref (filter->pool);
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}
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filter->pool = pool;
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/* and activate */
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gst_buffer_pool_set_active (filter->pool, TRUE);
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gst_caps_unref (target);
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return TRUE;
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}
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static GstFlowReturn
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gst_gdk_pixbuf_dec_flush (GstGdkPixbufDec * filter)
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{
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GstBuffer *outbuf;
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GdkPixbuf *pixbuf;
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int y;
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guint8 *out_pix;
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guint8 *in_pix;
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int in_rowstride, out_rowstride;
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GstFlowReturn ret;
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GstCaps *caps = NULL;
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gint width, height;
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gint n_channels;
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GstVideoFrame frame;
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pixbuf = gdk_pixbuf_loader_get_pixbuf (filter->pixbuf_loader);
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if (pixbuf == NULL)
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goto no_pixbuf;
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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if (GST_VIDEO_INFO_FORMAT (&filter->info) == GST_VIDEO_FORMAT_UNKNOWN) {
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GstVideoInfo info;
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GstVideoFormat fmt;
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GList *l;
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GST_DEBUG ("Set size to %dx%d", width, height);
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n_channels = gdk_pixbuf_get_n_channels (pixbuf);
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switch (n_channels) {
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case 3:
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fmt = GST_VIDEO_FORMAT_RGB;
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break;
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case 4:
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fmt = GST_VIDEO_FORMAT_RGBA;
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break;
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default:
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goto channels_not_supported;
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}
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gst_video_info_init (&info);
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gst_video_info_set_format (&info, fmt, width, height);
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info.fps_n = filter->in_fps_n;
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info.fps_d = filter->in_fps_d;
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caps = gst_video_info_to_caps (&info);
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filter->info = info;
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gst_pad_set_caps (filter->srcpad, caps);
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gst_caps_unref (caps);
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gst_gdk_pixbuf_dec_setup_pool (filter, &info);
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for (l = filter->pending_events; l; l = l->next)
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gst_pad_push_event (filter->srcpad, l->data);
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g_list_free (filter->pending_events);
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filter->pending_events = NULL;
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}
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ret = gst_buffer_pool_acquire_buffer (filter->pool, &outbuf, NULL);
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if (ret != GST_FLOW_OK)
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goto no_buffer;
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GST_BUFFER_TIMESTAMP (outbuf) = filter->last_timestamp;
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GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
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in_pix = gdk_pixbuf_get_pixels (pixbuf);
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in_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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gst_video_frame_map (&frame, &filter->info, outbuf, GST_MAP_WRITE);
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out_pix = GST_VIDEO_FRAME_PLANE_DATA (&frame, 0);
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out_rowstride = GST_VIDEO_FRAME_PLANE_STRIDE (&frame, 0);
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for (y = 0; y < height; y++) {
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memcpy (out_pix, in_pix, width * GST_VIDEO_FRAME_COMP_PSTRIDE (&frame, 0));
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in_pix += in_rowstride;
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out_pix += out_rowstride;
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}
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gst_video_frame_unmap (&frame);
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GST_DEBUG ("pushing... %" G_GSIZE_FORMAT " bytes",
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gst_buffer_get_size (outbuf));
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ret = gst_pad_push (filter->srcpad, outbuf);
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if (ret != GST_FLOW_OK)
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GST_DEBUG_OBJECT (filter, "flow: %s", gst_flow_get_name (ret));
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return ret;
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/* ERRORS */
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no_pixbuf:
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{
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GST_ELEMENT_ERROR (filter, STREAM, DECODE, (NULL),
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("error getting pixbuf"));
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return GST_FLOW_ERROR;
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}
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channels_not_supported:
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{
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GST_ELEMENT_ERROR (filter, STREAM, DECODE, (NULL),
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("%d channels not supported", n_channels));
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return GST_FLOW_ERROR;
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}
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no_buffer:
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{
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GST_DEBUG ("Failed to create outbuffer - %s", gst_flow_get_name (ret));
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return ret;
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}
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}
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static gboolean
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gst_gdk_pixbuf_dec_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstFlowReturn res = GST_FLOW_OK;
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gboolean ret = TRUE, forward = TRUE;
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GstGdkPixbufDec *pixbuf;
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pixbuf = GST_GDK_PIXBUF_DEC (parent);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:
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{
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GstCaps *caps;
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gst_event_parse_caps (event, &caps);
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ret = gst_gdk_pixbuf_dec_sink_setcaps (pixbuf, caps);
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forward = FALSE;
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break;
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}
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case GST_EVENT_EOS:
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if (pixbuf->pixbuf_loader != NULL) {
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gdk_pixbuf_loader_close (pixbuf->pixbuf_loader, NULL);
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res = gst_gdk_pixbuf_dec_flush (pixbuf);
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g_object_unref (G_OBJECT (pixbuf->pixbuf_loader));
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pixbuf->pixbuf_loader = NULL;
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/* as long as we don't have flow returns for event functions we need
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* to post an error here, or the application might never know that
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* things failed */
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if (res != GST_FLOW_OK && res != GST_FLOW_FLUSHING
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&& res != GST_FLOW_EOS && res != GST_FLOW_NOT_LINKED) {
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GST_ELEMENT_FLOW_ERROR (pixbuf, res);
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forward = FALSE;
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ret = FALSE;
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}
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}
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break;
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case GST_EVENT_FLUSH_STOP:
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g_list_free_full (pixbuf->pending_events,
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(GDestroyNotify) gst_event_unref);
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pixbuf->pending_events = NULL;
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/* Fall through */
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case GST_EVENT_SEGMENT:
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{
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const GstSegment *segment;
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GstSegment output_segment;
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guint32 seqnum;
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gst_event_parse_segment (event, &segment);
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if (segment->format == GST_FORMAT_BYTES)
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pixbuf->packetized = FALSE;
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else
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pixbuf->packetized = TRUE;
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if (segment->format != GST_FORMAT_TIME) {
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seqnum = gst_event_get_seqnum (event);
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gst_event_unref (event);
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gst_segment_init (&output_segment, GST_FORMAT_TIME);
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event = gst_event_new_segment (&output_segment);
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gst_event_set_seqnum (event, seqnum);
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}
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if (pixbuf->pixbuf_loader != NULL) {
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gdk_pixbuf_loader_close (pixbuf->pixbuf_loader, NULL);
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g_object_unref (G_OBJECT (pixbuf->pixbuf_loader));
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pixbuf->pixbuf_loader = NULL;
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}
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break;
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}
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default:
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break;
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}
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if (forward) {
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if (!gst_pad_has_current_caps (pixbuf->srcpad) &&
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GST_EVENT_IS_SERIALIZED (event)
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&& GST_EVENT_TYPE (event) > GST_EVENT_CAPS
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&& GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP
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&& GST_EVENT_TYPE (event) != GST_EVENT_EOS) {
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ret = TRUE;
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pixbuf->pending_events = g_list_prepend (pixbuf->pending_events, event);
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} else {
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ret = gst_pad_event_default (pad, parent, event);
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}
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} else {
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gst_event_unref (event);
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}
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return ret;
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}
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static GstFlowReturn
|
|
gst_gdk_pixbuf_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
|
|
{
|
|
GstGdkPixbufDec *filter;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GError *error = NULL;
|
|
GstClockTime timestamp;
|
|
GstMapInfo map;
|
|
|
|
filter = GST_GDK_PIXBUF_DEC (parent);
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buf);
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (timestamp))
|
|
filter->last_timestamp = timestamp;
|
|
|
|
GST_LOG_OBJECT (filter, "buffer with ts: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (timestamp));
|
|
|
|
if (filter->pixbuf_loader == NULL)
|
|
filter->pixbuf_loader = gdk_pixbuf_loader_new ();
|
|
|
|
gst_buffer_map (buf, &map, GST_MAP_READ);
|
|
|
|
GST_LOG_OBJECT (filter, "Writing buffer size %d", (gint) map.size);
|
|
if (!gdk_pixbuf_loader_write (filter->pixbuf_loader, map.data, map.size,
|
|
&error))
|
|
goto error;
|
|
|
|
if (filter->packetized == TRUE) {
|
|
gdk_pixbuf_loader_close (filter->pixbuf_loader, NULL);
|
|
ret = gst_gdk_pixbuf_dec_flush (filter);
|
|
g_object_unref (filter->pixbuf_loader);
|
|
filter->pixbuf_loader = NULL;
|
|
}
|
|
|
|
gst_buffer_unmap (buf, &map);
|
|
gst_buffer_unref (buf);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
error:
|
|
{
|
|
GST_ELEMENT_ERROR (filter, STREAM, DECODE, (NULL),
|
|
("gdk_pixbuf_loader_write error: %s", error->message));
|
|
g_error_free (error);
|
|
gst_buffer_unmap (buf, &map);
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_gdk_pixbuf_dec_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
|
|
GstGdkPixbufDec *dec = GST_GDK_PIXBUF_DEC (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
/* default to single image mode, setcaps function might not be called */
|
|
dec->in_fps_n = 0;
|
|
dec->in_fps_d = 1;
|
|
gst_video_info_init (&dec->info);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
if (ret == GST_STATE_CHANGE_FAILURE)
|
|
return ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
dec->in_fps_n = 0;
|
|
dec->in_fps_d = 0;
|
|
if (dec->pool) {
|
|
gst_buffer_pool_set_active (dec->pool, FALSE);
|
|
gst_object_replace ((GstObject **) & dec->pool, NULL);
|
|
}
|
|
g_list_free_full (dec->pending_events, (GDestroyNotify) gst_event_unref);
|
|
dec->pending_events = NULL;
|
|
if (dec->pixbuf_loader != NULL) {
|
|
gdk_pixbuf_loader_close (dec->pixbuf_loader, NULL);
|
|
g_object_unref (G_OBJECT (dec->pixbuf_loader));
|
|
dec->pixbuf_loader = NULL;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|