gstreamer/ext/gdk_pixbuf/gstgdkanimation.c
Benjamin Otte 8468a02e24 add initial version of gdkpixbuf loader for gtk that is capable of loading AVI and mpeg videos as GdkPixbufAnimation....
Original commit message from CVS:
add initial version of gdkpixbuf loader for gtk that is capable of loading AVI and mpeg videos as GdkPixbufAnimation. I'm not sure if such a thing would be useful or too much trouble, so I'll throw it at enough testers to figure it out ;) We might want to disable it by defualt though in the future. (Currently there is not even a configure switch implemented to disable it.)
This includes a fix to not use GError in gstgdkpixbuf's typefind function and to only return GST_TYPE_FIND_MINIMUM when doing typefinding via gdk as this breaks quite a bit with the GStreamer loader installed.
2003-11-05 03:24:54 +00:00

483 lines
15 KiB
C

/*
* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
*
* 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.
*/
#include "config.h"
#include "gstgdkanimation.h"
#include <unistd.h>
GST_DEBUG_CATEGORY_STATIC (gst_gdk_animation_debug);
#define GST_CAT_DEFAULT gst_gdk_animation_debug
static void gst_gdk_animation_class_init (gpointer g_class,
gpointer class_data);
static void gst_gdk_animation_finalize (GObject * object);
static gboolean gst_gdk_animation_is_static_image (GdkPixbufAnimation * animation);
static GdkPixbuf* gst_gdk_animation_get_static_image (GdkPixbufAnimation * animation);
static void gst_gdk_animation_get_size (GdkPixbufAnimation * anim,
gint * width,
gint * height);
static GdkPixbufAnimationIter* gst_gdk_animation_get_iter (GdkPixbufAnimation * anim,
const GTimeVal * start_time);
static gpointer parent_class;
GType
gst_gdk_animation_get_type (void)
{
static GType object_type = 0;
if (!object_type) {
static const GTypeInfo object_info = {
sizeof (GstGdkAnimationClass),
NULL,
NULL,
gst_gdk_animation_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GstGdkAnimation),
0, /* n_preallocs */
NULL,
};
object_type = g_type_register_static (GDK_TYPE_PIXBUF_ANIMATION,
"GstGdkAnimation", &object_info, 0);
GST_DEBUG_CATEGORY_INIT (gst_gdk_animation_debug, "gstloader_animation", 0, "GStreamer GdkPixbuf loader - GdkAnimation class");
}
return object_type;
}
static void
gst_gdk_animation_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *object_class = G_OBJECT_CLASS (g_class);
GdkPixbufAnimationClass *anim_class = GDK_PIXBUF_ANIMATION_CLASS (g_class);
parent_class = g_type_class_peek_parent (g_class);
object_class->finalize = gst_gdk_animation_finalize;
anim_class->is_static_image = gst_gdk_animation_is_static_image;
anim_class->get_static_image = gst_gdk_animation_get_static_image;
anim_class->get_size = gst_gdk_animation_get_size;
anim_class->get_iter = gst_gdk_animation_get_iter;
}
static void
gst_gdk_animation_finalize (GObject *object)
{
GstGdkAnimation *ani = GST_GDK_ANIMATION (object);
if (ani->temp_fd) {
close (ani->temp_fd);
}
if (ani->temp_location) {
remove (ani->temp_location);
g_free (ani->temp_location);
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
GdkPixbufAnimation *
gst_gdk_animation_new_from_file (FILE *f, GError **error)
{
GdkPixbufAnimationIter *iter;
GTimeVal tv;
int fd2;
guint8 data[4096];
guint size;
int fd = fileno (f);
GstGdkAnimation *ani = GST_GDK_ANIMATION (g_object_new (GST_TYPE_GDK_ANIMATION, NULL));
fd2 = g_file_open_tmp (NULL, &ani->temp_location, error);
if (fd2 == -1)
return NULL;
while ((size = read (fd, data, 4096)) > 0) {
if (write (fd2, data, size) != size)
break;
}
close (fd2);
/* we need some info that is only provided by iters */
g_get_current_time (&tv);
iter = gst_gdk_animation_get_iter (GDK_PIXBUF_ANIMATION (ani), &tv);
g_object_unref (iter);
return GDK_PIXBUF_ANIMATION (ani);
}
static gboolean
gst_gdk_animation_is_static_image (GdkPixbufAnimation *animation)
{
return FALSE;
}
static GdkPixbuf*
gst_gdk_animation_get_static_image (GdkPixbufAnimation *animation)
{
return NULL;
}
static void
gst_gdk_animation_get_size (GdkPixbufAnimation *anim, gint *width, int *height)
{
GstGdkAnimation *ani = GST_GDK_ANIMATION (anim);
GST_LOG_OBJECT (ani, "get_size called (%p, %p) %d x %d", width, height, ani->width, ani->height);
if (width)
*width = ani->width;
if (height)
*height = ani->height;
}
static void gst_gdk_animation_iter_class_init (gpointer g_class,
gpointer class_data);
static void gst_gdk_animation_iter_init (GTypeInstance * instance,
gpointer g_class);
static void gst_gdk_animation_iter_finalize (GObject * object);
static gint gst_gdk_animation_iter_get_delay_time (GdkPixbufAnimationIter * iter);
static GdkPixbuf * gst_gdk_animation_iter_get_pixbuf (GdkPixbufAnimationIter * iter);
static gboolean gst_gdk_animation_iter_on_currently_loading_frame (GdkPixbufAnimationIter * iter);
static gboolean gst_gdk_animation_iter_advance (GdkPixbufAnimationIter * iter,
const GTimeVal * current_time);
static gpointer iter_parent_class;
GType
gst_gdk_animation_iter_get_type (void)
{
static GType object_type = 0;
if (!object_type) {
static const GTypeInfo object_info = {
sizeof (GstGdkAnimationIterClass),
NULL,
NULL,
gst_gdk_animation_iter_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GstGdkAnimationIter),
0, /* n_preallocs */
gst_gdk_animation_iter_init,
};
object_type = g_type_register_static (GDK_TYPE_PIXBUF_ANIMATION_ITER,
"GdkPixbufAniAnimIter", &object_info, 0);
}
return object_type;
}
static void
gst_gdk_animation_iter_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *object_class = G_OBJECT_CLASS (g_class);
GdkPixbufAnimationIterClass *anim_iter_class = GDK_PIXBUF_ANIMATION_ITER_CLASS (g_class);
iter_parent_class = g_type_class_peek_parent (g_class);
object_class->finalize = gst_gdk_animation_iter_finalize;
anim_iter_class->get_delay_time = gst_gdk_animation_iter_get_delay_time;
anim_iter_class->get_pixbuf = gst_gdk_animation_iter_get_pixbuf;
anim_iter_class->on_currently_loading_frame = gst_gdk_animation_iter_on_currently_loading_frame;
anim_iter_class->advance = gst_gdk_animation_iter_advance;
}
static void
gst_gdk_animation_iter_init (GTypeInstance *instance, gpointer g_class)
{
GstGdkAnimationIter *iter = GST_GDK_ANIMATION_ITER (instance);
iter->buffers = g_queue_new ();
iter->eos = FALSE;
}
static void
gst_gdk_animation_iter_finalize (GObject *object)
{
GstGdkAnimationIter *iter = GST_GDK_ANIMATION_ITER (object);
g_object_unref (iter->ani);
if (iter->pipeline)
g_object_unref (iter->pipeline);
if (iter->pixbuf)
g_object_unref (iter->pixbuf);
while (iter->buffers) {
GstBuffer *buffer = GST_BUFFER (g_queue_pop_head (iter->buffers));
if (buffer) {
GST_LOG_OBJECT (iter, "unreffing buffer %p on finalize", buffer);
gst_data_unref (GST_DATA (buffer));
} else {
g_queue_free (iter->buffers);
iter->buffers = NULL;
}
}
G_OBJECT_CLASS (iter_parent_class)->finalize (object);
}
static void
got_handoff (GstElement *fakesink, GstBuffer *buffer, GstGdkAnimationIter *iter)
{
GST_LOG_OBJECT (iter, "enqueing buffer %p", buffer);
gst_data_ref (GST_DATA (buffer));
g_queue_push_tail (iter->buffers, buffer);
}
static GstElement *
gst_gdk_animation_iter_create_pipeline (GstGdkAnimationIter *iter)
{
GstElement *ret;
GstElement *src, *autoplugger, *sink, *colorspace;
GstCaps *caps = GST_CAPS_NEW ("pixbuf_filter",
"video/x-raw-rgb",
"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
"bpp", GST_PROPS_LIST (
GST_PROPS_INT (32),
GST_PROPS_INT (24)
),
"red_mask", GST_PROPS_INT (0x000000FF),
"green_mask", GST_PROPS_INT (0x0000FF00),
"blue_mask", GST_PROPS_INT (0x00FF0000)
);
ret = gst_element_factory_make ("pipeline", "main_pipeline");
if (!ret) return NULL;
if (!(src = gst_element_factory_make ("filesrc", "source")))
goto error;
gst_bin_add (GST_BIN (ret), src);
g_object_set (src, "location", iter->ani->temp_location, NULL);
if (!(autoplugger = gst_element_factory_make ("spider", "autoplugger")))
goto error;
gst_bin_add (GST_BIN (ret), autoplugger);
gst_element_link (src, autoplugger);
if (!(colorspace = gst_element_factory_make ("colorspace", "colorspace")))
goto error;
gst_bin_add (GST_BIN (ret), colorspace);
gst_element_link (autoplugger, colorspace);
if (!(sink = gst_element_factory_make ("fakesink", "sink")))
goto error;
g_object_set (sink, "signal-handoffs", TRUE, NULL);
g_signal_connect (sink, "handoff", (GCallback) got_handoff, iter);
gst_bin_add (GST_BIN (ret), sink);
gst_element_link_filtered (colorspace, sink, caps);
gst_element_set_state (ret, GST_STATE_PLAYING);
return ret;
error:
g_object_unref (ret);
return NULL;
}
static gboolean
gst_gdk_animation_iter_may_advance (GstGdkAnimationIter *iter)
{
GstFormat bytes = GST_FORMAT_BYTES;
gint64 offset;
gint64 data_amount;
if (iter->ani->temp_fd == 0)
return TRUE;
data_amount = lseek (iter->ani->temp_fd, 0, SEEK_CUR);
g_assert (data_amount >= 0);
g_assert (gst_element_query (gst_bin_get_by_name (GST_BIN (iter->pipeline), "source"),
GST_QUERY_POSITION, &bytes, &offset));
if (data_amount - offset > GST_GDK_BUFFER_SIZE) /* random number */
return TRUE;
return FALSE;
}
static gboolean
gst_gdk_animation_get_more_buffers (GstGdkAnimationIter *iter)
{
GstBuffer *last = g_queue_peek_tail (iter->buffers);
do {
GST_LOG_OBJECT (iter, "iterating...");
if (!gst_gdk_animation_iter_may_advance (iter))
return FALSE;
if (!gst_bin_iterate (GST_BIN (iter->pipeline))) {
GST_LOG_OBJECT (iter, "iterating done, setting EOS");
iter->eos = TRUE;
break;
}
} while (last == g_queue_peek_tail (iter->buffers));
return TRUE;
}
static void
pixbuf_destroy_notify (guchar *pixels, gpointer data)
{
GST_LOG ("unreffing buffer %p because pixbuf was destroyed", data);
gst_data_unref (GST_DATA (data));
}
static void
gst_gdk_animation_iter_create_pixbuf (GstGdkAnimationIter *iter)
{
GstBuffer *buf;
GstGdkAnimation *ani = iter->ani;
buf = g_queue_pop_head (iter->buffers);
g_assert (buf);
if (iter->pixbuf) {
GST_LOG_OBJECT (iter, "unreffing pixbuf %p", iter->pixbuf);
g_object_unref (iter->pixbuf);
}
if (ani->width == 0) {
GstPad *pad;
GstCaps *caps;
GstElement *fakesink = gst_bin_get_by_name (GST_BIN (iter->pipeline), "sink");
g_assert (fakesink);
pad = gst_element_get_pad (fakesink, "sink");
g_assert (pad);
caps = gst_pad_get_caps (pad);
g_assert (caps);
g_assert (GST_CAPS_IS_FIXED (caps));
g_assert (gst_caps_has_fixed_property (caps, "bpp") &&
gst_caps_has_fixed_property (caps, "width") &&
gst_caps_has_fixed_property (caps, "height"));
gst_caps_get_int (caps, "width", &ani->width);
gst_caps_get_int (caps, "height", &ani->height);
gst_caps_get_int (caps, "bpp", &ani->bpp);
GST_DEBUG_OBJECT (ani, "found format (width %d, height %d, bpp %d)", ani->width, ani->height, ani->bpp);
}
g_assert (GST_BUFFER_SIZE (buf) == ani->width * ani->height * ani->bpp / 8);
if (ani->bpp == 32) {
gint i;
guint32 *data = (guint32 *) GST_BUFFER_DATA (buf);
/* ensure opacity */
for (i = 0; i < ani->width * ani->height; i++) {
data[i] |= 0xFF000000;
}
}
iter->pixbuf = gdk_pixbuf_new_from_data (GST_BUFFER_DATA (buf),
GDK_COLORSPACE_RGB, ani->bpp == 32, 8, ani->width, ani->height, ani->width * ani->bpp / 8, pixbuf_destroy_notify, buf);
GST_LOG_OBJECT (iter, "created pixbuf %p from buffer %p (refcount %d)", iter->pixbuf, buf, GST_DATA_REFCOUNT_VALUE (buf));
}
static GdkPixbufAnimationIter*
gst_gdk_animation_get_iter (GdkPixbufAnimation *anim, const GTimeVal *start_time)
{
GstGdkAnimationIter *iter;
iter = g_object_new (GST_TYPE_GDK_ANIMATION_ITER, NULL);
iter->start = *start_time;
iter->ani = GST_GDK_ANIMATION (anim);
iter->pipeline = gst_gdk_animation_iter_create_pipeline (iter);
if (iter->pipeline == NULL) {
g_object_unref (iter);
return NULL;
}
g_object_ref (iter->ani);
gst_gdk_animation_get_more_buffers (iter);
gst_gdk_animation_iter_create_pixbuf (iter);
return GDK_PIXBUF_ANIMATION_ITER (iter);
}
static gboolean
gst_gdk_animation_iter_advance (GdkPixbufAnimationIter *anim_iter, const GTimeVal *current_time)
{
GstClockTime offset;
GstBuffer *buffer = NULL;
GstGdkAnimationIter *iter = GST_GDK_ANIMATION_ITER (anim_iter);
/* compute timestamp that next buffer must match */
GST_DEBUG_OBJECT (iter, "advancing to %ld:%ld (started at %ld:%ld)",
current_time->tv_sec, current_time->tv_usec, iter->start.tv_sec, iter->start.tv_usec);
offset = ((GstClockTime) current_time->tv_sec - iter->start.tv_sec) * GST_SECOND;
if (iter->start.tv_usec > current_time->tv_usec) {
offset -= ((GstClockTime) iter->start.tv_usec - current_time->tv_usec) * GST_SECOND / G_USEC_PER_SEC;
} else {
offset += ((GstClockTime) current_time->tv_usec - iter->start.tv_usec) * GST_SECOND / G_USEC_PER_SEC;
}
while (TRUE) {
if (g_queue_is_empty (iter->buffers)) {
if (iter->eos)
return FALSE;
if (gst_gdk_animation_get_more_buffers (iter))
continue;
break;
}
if (GST_BUFFER_TIMESTAMP (g_queue_peek_head (iter->buffers)) > offset)
break;
if (buffer) {
GST_LOG_OBJECT (iter, "unreffing buffer %p, because timestamp too low (%"G_GUINT64_FORMAT" vs %"G_GUINT64_FORMAT")",
buffer, GST_BUFFER_TIMESTAMP (buffer), offset);
gst_data_unref (GST_DATA (buffer));
}
buffer = GST_BUFFER (g_queue_pop_head (iter->buffers));
}
if (!buffer)
return FALSE;
iter->last_timestamp = GST_BUFFER_TIMESTAMP (buffer);
g_queue_push_head (iter->buffers, buffer);
gst_gdk_animation_iter_create_pixbuf (iter);
return TRUE;
}
static gint
gst_gdk_animation_iter_get_delay_time (GdkPixbufAnimationIter *anim_iter)
{
gint delay;
GstGdkAnimationIter *iter = GST_GDK_ANIMATION_ITER (anim_iter);
while (g_queue_is_empty (iter->buffers)) {
if (iter->eos) {
GST_LOG_OBJECT (iter, "returning delay of infinite, we're EOS");
return -1;
}
if (!gst_gdk_animation_get_more_buffers (iter))
return -1; /* FIXME? */
}
delay = (GST_BUFFER_TIMESTAMP (g_queue_peek_head (iter->buffers)) - iter->last_timestamp) *
1000 / GST_SECOND;
GST_LOG_OBJECT (iter, "returning delay of %d ms", delay);
return delay;
}
GdkPixbuf*
gst_gdk_animation_iter_get_pixbuf (GdkPixbufAnimationIter *anim_iter)
{
GstGdkAnimationIter *iter = GST_GDK_ANIMATION_ITER (anim_iter);
GST_LOG_OBJECT (iter, "returning pixbuf %p", iter->pixbuf);
return iter->pixbuf;
}
static gboolean
gst_gdk_animation_iter_on_currently_loading_frame (GdkPixbufAnimationIter *anim_iter)
{
GstGdkAnimationIter *iter = GST_GDK_ANIMATION_ITER (anim_iter);
/* EOS - last frame */
if (iter->eos && g_queue_is_empty (iter->buffers))
return TRUE;
/* can't load more frames */
if (!gst_gdk_animation_iter_may_advance (iter))
return FALSE;
return TRUE;
}