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/*
* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
*
* gst_loader.c: Load GStreamer videos as gdkpixbufs
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgdkanimation.h"
#include <gst/gstinfo.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
typedef struct {
/* stuff gdk throws at us and we're supposed to keep */
GdkPixbufModuleSizeFunc size_func;
GdkPixbufModulePreparedFunc prepared_func;
GdkPixbufModuleUpdatedFunc updated_func;
gpointer user_data;
/* our own stuff - we're much better at keeping fields small :p */
GstGdkAnimation * ani;
gboolean initialized;
} GstLoaderContext;
GST_DEBUG_CATEGORY_STATIC (gst_loader_debug);
#define GST_CAT_DEFAULT gst_loader_debug
static gboolean
gst_loader_init (GError **error)
{
static gboolean inited = FALSE;
if (inited)
return TRUE;
if (!g_thread_supported ()) {
g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
"The GStreamer loader requires threading support.");
return FALSE;
}
if (!gst_init_check (0, NULL)) {
g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
"GStreamer could not be initialized.");
return FALSE;
}
inited = TRUE;
GST_DEBUG_CATEGORY_INIT (gst_loader_debug, "gstloader", 0, "entry point debugging for the GStreamer gdk pixbuf loader");
return TRUE;
}
static gpointer
gst_loader_begin_load (GdkPixbufModuleSizeFunc size_func, GdkPixbufModulePreparedFunc prepared_func,
GdkPixbufModuleUpdatedFunc updated_func, gpointer user_data, GError **error)
{
GstLoaderContext *context;
if (!gst_loader_init (error))
return NULL;
context = g_new (GstLoaderContext, 1);
context->size_func = size_func;
context->prepared_func = prepared_func;
context->updated_func = updated_func;
context->user_data = user_data;
context->ani = gst_gdk_animation_new (error);
context->initialized = FALSE;
if (!context->ani) {
GST_WARNING ("creating animation failed");
g_free (context);
return NULL;
}
context->ani->temp_fd = g_file_open_tmp (NULL, &context->ani->temp_location, error);
if (context->ani->temp_fd == 0) {
g_object_unref (context->ani);
g_free (context);
return NULL;
}
GST_LOG_OBJECT (context->ani, "begin loading");
return context;
}
static gboolean
gst_loader_load_increment (gpointer context_pointer, const guchar *buf, guint size, GError **error)
{
GdkPixbufAnimationIter *iter;
GstLoaderContext *context = (GstLoaderContext *) context_pointer;
GST_LOG_OBJECT (context->ani, "load increment: %u bytes", size);
gst_gdk_animation_add_data (context->ani, buf, size);
if (!context->initialized && (iter = gdk_pixbuf_animation_get_iter (
GDK_PIXBUF_ANIMATION (context->ani), NULL)) != NULL) {
int width = gdk_pixbuf_animation_get_width (GDK_PIXBUF_ANIMATION (context->ani));
int height = gdk_pixbuf_animation_get_height (GDK_PIXBUF_ANIMATION (context->ani));
GdkPixbuf *pixbuf = gdk_pixbuf_animation_get_static_image (GDK_PIXBUF_ANIMATION (context->ani));
g_object_unref (iter);
GST_LOG_OBJECT (context->ani, "initializing loader");
if (context->size_func) {
GST_LOG_OBJECT (context->ani, "calling size_func %p", context->size_func);
context->size_func (&width, &height, context->user_data);
}
if (context->prepared_func) {
GST_LOG_OBJECT (context->ani, "calling prepared_func %p", context->prepared_func);
context->prepared_func (pixbuf, GDK_PIXBUF_ANIMATION (context->ani), context->user_data);
}
context->initialized = TRUE;
}
return TRUE;
}
static gboolean
gst_loader_stop_load (gpointer context_pointer, GError **error)
{
GstLoaderContext *context = (GstLoaderContext *) context_pointer;
GST_LOG_OBJECT (context->ani, "stop loading");
gst_gdk_animation_done_adding (context->ani);
g_object_unref (context->ani);
g_free (context);
return TRUE;
}
static GdkPixbufAnimation *
gst_loader_load_animation (FILE *f, GError **error)
{
gchar *filename;
GstGdkAnimation *ani;
GdkPixbufAnimationIter *iter = NULL;
if (!gst_loader_init (error))
return NULL;
GST_LOG ("load_animation");
ani = gst_gdk_animation_new (error);
if (!ani)
return NULL;
filename = g_strdup_printf ("/proc/self/fd/%d", fileno (f));
ani->temp_fd = open (filename, 0);
if (ani->temp_fd >= 0) {
iter = gdk_pixbuf_animation_get_iter (GDK_PIXBUF_ANIMATION (ani), NULL);
} else {
GST_DEBUG ("open (\"%s\", 0) failed", filename);
}
g_free (filename);
if (iter == NULL) {
g_set_error (error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
"could not create an image");
g_object_unref (ani);
GST_INFO ("could not create an image");
return NULL;
}
g_object_unref (iter);
GST_LOG_OBJECT (ani, "load_animation succeeded");
return GDK_PIXBUF_ANIMATION (ani);
}
void
fill_vtable (GdkPixbufModule *module)
{
module->begin_load = gst_loader_begin_load;
module->load_increment = gst_loader_load_increment;
module->stop_load = gst_loader_stop_load;
module->load_animation = gst_loader_load_animation;
}
void
fill_info (GdkPixbufFormat *info)
{
static GdkPixbufModulePattern signature[] = {
/* AVI */
{ "RIFF AVI ", " xxxx ", 100 },
/* MPEG 1 */
{ "xx\001\272", "zz ", 100 },
/* Quicktime */
{ " wide", "xxxx ", 80 },
{ " moov", "xxxx ", 80 },
{ " mdat", "xxxx ", 80 },
{ " pnot", "xxxx ", 80 },
{ " PICT", "xxxx ", 80 },
{ " free", "xxxx ", 80 },
{ NULL, NULL, 0 }
};
static gchar *mime_types[] = {
"video/avi", "video/x-avi",
"video/mpeg",
NULL
};
static gchar *extensions[] = {
"avi",
"mpeg", "mpe", "mpg",
"mov",
NULL
};
info->name = "GStreamer";
info->signature = signature;
info->description = "GStreamer supported video";
info->mime_types = mime_types;
info->extensions = extensions;
info->flags = 0;
}
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