gstreamer/gst/frei0r/gstfrei0rsrc.c
Sebastian Dröge 15f1ccaef8 frei0r: Don't allow caps changes in PLAYING/PAUSED
Most frei0r source plugins generate output based on
previous output and creating a new instance on caps
changes will let the output start at 0 again.
2009-06-19 11:03:14 +02:00

412 lines
12 KiB
C

/* GStreamer
* Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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 <string.h>
#include "gstfrei0r.h"
#include "gstfrei0rsrc.h"
GST_DEBUG_CATEGORY_EXTERN (frei0r_debug);
#define GST_CAT_DEFAULT frei0r_debug
typedef struct
{
f0r_plugin_info_t info;
GstFrei0rFuncTable ftable;
} GstFrei0rSrcClassData;
static gboolean
gst_frei0r_src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstFrei0rSrc *self = GST_FREI0R_SRC (src);
GstFrei0rSrcClass *klass = GST_FREI0R_SRC_GET_CLASS (src);
if (!gst_video_format_parse_caps (caps, &self->fmt, &self->width,
&self->height)
|| !gst_video_parse_caps_framerate (caps, &self->fps_n, &self->fps_d))
return FALSE;
if (self->f0r_instance) {
klass->ftable->destruct (self->f0r_instance);
self->f0r_instance = NULL;
}
self->f0r_instance =
gst_frei0r_instance_construct (klass->ftable, klass->properties,
klass->n_properties, self->property_cache, self->width, self->height);
return TRUE;
}
static GstCaps *
gst_frei0r_src_get_caps (GstBaseSrc * src)
{
if (GST_PAD_CAPS (GST_BASE_SRC_PAD (src)))
return gst_caps_ref (GST_PAD_CAPS (GST_BASE_SRC_PAD (src)));
else
return
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (src)));
}
static GstFlowReturn
gst_frei0r_src_create (GstPushSrc * src, GstBuffer ** buf)
{
GstFrei0rSrc *self = GST_FREI0R_SRC (src);
GstFrei0rSrcClass *klass = GST_FREI0R_SRC_GET_CLASS (src);
guint size, newsize;
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *outbuf = NULL;
gdouble time;
*buf = NULL;
if (G_UNLIKELY (!self->f0r_instance))
return GST_FLOW_NOT_NEGOTIATED;
newsize = gst_video_format_get_size (self->fmt, self->width, self->height);
ret =
gst_pad_alloc_buffer_and_set_caps (GST_BASE_SRC_PAD (src),
GST_BUFFER_OFFSET_NONE, newsize, GST_PAD_CAPS (GST_BASE_SRC_PAD (src)),
&outbuf);
if (ret != GST_FLOW_OK)
return ret;
/* Format might have changed */
size = GST_BUFFER_SIZE (outbuf);
newsize = gst_video_format_get_size (self->fmt, self->width, self->height);
if (size != newsize) {
gst_buffer_unref (outbuf);
outbuf = gst_buffer_new_and_alloc (newsize);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (GST_BASE_SRC_PAD (src)));
}
GST_BUFFER_TIMESTAMP (outbuf) =
gst_util_uint64_scale (self->n_frames, GST_SECOND * self->fps_d,
self->fps_n);
GST_BUFFER_OFFSET (outbuf) = self->n_frames;
self->n_frames++;
GST_BUFFER_OFFSET_END (outbuf) = self->n_frames;
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale (self->n_frames, GST_SECOND * self->fps_d,
self->fps_n) - GST_BUFFER_TIMESTAMP (outbuf);
time = ((gdouble) GST_BUFFER_TIMESTAMP (outbuf)) / GST_SECOND;
if (klass->ftable->update2)
klass->ftable->update2 (self->f0r_instance, time, NULL, NULL, NULL,
(guint32 *) GST_BUFFER_DATA (outbuf));
else
klass->ftable->update (self->f0r_instance, time, NULL,
(guint32 *) GST_BUFFER_DATA (outbuf));
*buf = outbuf;
return GST_FLOW_OK;
}
static gboolean
gst_frei0r_src_start (GstBaseSrc * basesrc)
{
GstFrei0rSrc *self = GST_FREI0R_SRC (basesrc);
self->n_frames = 0;
return TRUE;
}
static gboolean
gst_frei0r_src_stop (GstBaseSrc * basesrc)
{
GstFrei0rSrc *self = GST_FREI0R_SRC (basesrc);
GstFrei0rSrcClass *klass = GST_FREI0R_SRC_GET_CLASS (basesrc);
if (self->f0r_instance) {
klass->ftable->destruct (self->f0r_instance);
self->f0r_instance = NULL;
}
return TRUE;
}
static gboolean
gst_frei0r_src_is_seekable (GstBaseSrc * psrc)
{
return TRUE;
}
static gboolean
gst_frei0r_src_do_seek (GstBaseSrc * bsrc, GstSegment * segment)
{
GstClockTime time;
GstFrei0rSrc *self = GST_FREI0R_SRC (bsrc);
segment->time = segment->start;
time = segment->last_stop;
/* now move to the time indicated */
if (self->fps_n) {
self->n_frames = gst_util_uint64_scale (time,
self->fps_n, self->fps_d * GST_SECOND);
} else {
self->n_frames = 0;
}
return TRUE;
}
static gboolean
gst_frei0r_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
gboolean res;
GstFrei0rSrc *self = GST_FREI0R_SRC (bsrc);
GstFrei0rSrcClass *klass = GST_FREI0R_SRC_GET_CLASS (self);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
if (src_fmt == dest_fmt) {
dest_val = src_val;
goto done;
}
switch (src_fmt) {
case GST_FORMAT_DEFAULT:
switch (dest_fmt) {
case GST_FORMAT_TIME:
/* frames to time */
if (self->fps_n) {
dest_val = gst_util_uint64_scale (src_val,
self->fps_d * GST_SECOND, self->fps_n);
} else {
dest_val = 0;
}
break;
default:
goto error;
}
break;
case GST_FORMAT_TIME:
switch (dest_fmt) {
case GST_FORMAT_DEFAULT:
/* time to frames */
if (self->fps_n) {
dest_val = gst_util_uint64_scale (src_val,
self->fps_n, self->fps_d * GST_SECOND);
} else {
dest_val = 0;
}
break;
default:
goto error;
}
break;
default:
goto error;
}
done:
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
res = TRUE;
break;
}
default:
res =
GST_BASE_SRC_CLASS (g_type_class_peek_parent (klass))->query (bsrc,
query);
}
return res;
/* ERROR */
error:
{
GST_DEBUG_OBJECT (self, "query failed");
return FALSE;
}
}
static void
gst_frei0r_src_src_fixate (GstPad * pad, GstCaps * caps)
{
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
}
static void
gst_frei0r_src_finalize (GObject * object)
{
GstFrei0rSrc *self = GST_FREI0R_SRC (object);
GstFrei0rSrcClass *klass = GST_FREI0R_SRC_GET_CLASS (object);
if (self->f0r_instance) {
klass->ftable->destruct (self->f0r_instance);
self->f0r_instance = NULL;
}
if (self->property_cache)
gst_frei0r_property_cache_free (klass->properties, self->property_cache,
klass->n_properties);
self->property_cache = NULL;
G_OBJECT_CLASS (g_type_class_peek_parent (klass))->finalize (object);
}
static void
gst_frei0r_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstFrei0rSrc *self = GST_FREI0R_SRC (object);
GstFrei0rSrcClass *klass = GST_FREI0R_SRC_GET_CLASS (object);
if (!gst_frei0r_get_property (self->f0r_instance, klass->ftable,
klass->properties, klass->n_properties, self->property_cache, prop_id,
value))
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
static void
gst_frei0r_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstFrei0rSrc *self = GST_FREI0R_SRC (object);
GstFrei0rSrcClass *klass = GST_FREI0R_SRC_GET_CLASS (object);
if (!gst_frei0r_set_property (self->f0r_instance, klass->ftable,
klass->properties, klass->n_properties, self->property_cache, prop_id,
value))
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
static void
gst_frei0r_src_class_init (GstFrei0rSrcClass * klass,
GstFrei0rSrcClassData * class_data)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstPushSrcClass *gstpushsrc_class = (GstPushSrcClass *) klass;
GstBaseSrcClass *gstbasesrc_class = (GstBaseSrcClass *) klass;
GstPadTemplate *templ;
GstCaps *caps;
gchar *author;
klass->ftable = &class_data->ftable;
klass->info = &class_data->info;
gobject_class->finalize = gst_frei0r_src_finalize;
gobject_class->set_property = gst_frei0r_src_set_property;
gobject_class->get_property = gst_frei0r_src_get_property;
klass->n_properties = klass->info->num_params;
klass->properties = g_new0 (GstFrei0rProperty, klass->n_properties);
gst_frei0r_klass_install_properties (gobject_class, klass->ftable,
klass->properties, klass->n_properties);
author =
g_strdup_printf
("Sebastian Dröge <sebastian.droege@collabora.co.uk>, %s",
class_data->info.author);
gst_element_class_set_details_simple (gstelement_class, class_data->info.name,
"Src/Video", class_data->info.explanation, author);
g_free (author);
caps = gst_frei0r_caps_from_color_model (class_data->info.color_model);
templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
gst_element_class_add_pad_template (gstelement_class, templ);
gstbasesrc_class->set_caps = gst_frei0r_src_set_caps;
gstbasesrc_class->get_caps = gst_frei0r_src_get_caps;
gstbasesrc_class->is_seekable = gst_frei0r_src_is_seekable;
gstbasesrc_class->do_seek = gst_frei0r_src_do_seek;
gstbasesrc_class->query = gst_frei0r_src_query;
gstbasesrc_class->start = gst_frei0r_src_start;
gstbasesrc_class->stop = gst_frei0r_src_stop;
gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_frei0r_src_create);
}
static void
gst_frei0r_src_init (GstFrei0rSrc * self, GstFrei0rSrcClass * klass)
{
GstPad *pad = GST_BASE_SRC_PAD (self);
self->property_cache =
gst_frei0r_property_cache_init (klass->properties, klass->n_properties);
gst_pad_set_fixatecaps_function (pad, gst_frei0r_src_src_fixate);
gst_base_src_set_format (GST_BASE_SRC_CAST (self), GST_FORMAT_TIME);
}
gboolean
gst_frei0r_src_register (GstPlugin * plugin, const f0r_plugin_info_t * info,
const GstFrei0rFuncTable * ftable)
{
GTypeInfo typeinfo = {
sizeof (GstFrei0rSrcClass),
NULL,
NULL,
(GClassInitFunc) gst_frei0r_src_class_init,
NULL,
NULL,
sizeof (GstFrei0rSrc),
0,
(GInstanceInitFunc) gst_frei0r_src_init
};
GType type;
gchar *type_name, *tmp;
GstFrei0rSrcClassData *class_data;
tmp = g_strdup_printf ("frei0r-src-%s", info->name);
type_name = g_ascii_strdown (tmp, -1);
g_free (tmp);
g_strcanon (type_name, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-+", '-');
if (g_type_from_name (type_name)) {
GST_WARNING ("Type '%s' already exists", type_name);
return FALSE;
}
if (!ftable->init ()) {
GST_ERROR ("Initializing plugin failed");
return FALSE;
}
class_data = g_new0 (GstFrei0rSrcClassData, 1);
memcpy (&class_data->info, info, sizeof (f0r_plugin_info_t));
memcpy (&class_data->ftable, ftable, sizeof (GstFrei0rFuncTable));
typeinfo.class_data = class_data;
type = g_type_register_static (GST_TYPE_PUSH_SRC, type_name, &typeinfo, 0);
return (gst_element_register (plugin, type_name, GST_RANK_NONE, type));
}