gstreamer/gst/playback/gstdecodebin.c
Thomas Vander Stichele 7144b47a83 rename properly
Original commit message from CVS:
rename properly
2004-07-29 14:08:11 +00:00

610 lines
16 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <gst/gst.h>
/* generic templates */
GstStaticPadTemplate decoder_bin_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GstStaticPadTemplate decoder_bin_src_template =
GST_STATIC_PAD_TEMPLATE ("src%d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (gst_decode_bin_debug);
#define GST_CAT_DEFAULT gst_decode_bin_debug
#define GST_TYPE_DECODE_BIN (gst_decode_bin_get_type())
#define GST_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_BIN,GstDecodeBin))
#define GST_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECODE_BIN,GstDecodeBinClass))
#define GST_IS_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECODE_BIN))
#define GST_IS_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECODE_BIN))
typedef struct _GstDecodeBin GstDecodeBin;
typedef struct _GstDecodeBinClass GstDecodeBinClass;
struct _GstDecodeBin
{
GstBin bin;
GstElement *typefind;
gboolean threaded;
GList *dynamics;
GList *factories;
gint numpads;
GList *elements;
guint have_type_id;
};
struct _GstDecodeBinClass
{
GstBinClass parent_class;
void (*new_decoded_pad) (GstElement * element, GstPad * pad, gboolean last);
void (*unknown_type) (GstElement * element, GstCaps * caps);
};
/* props */
enum
{
ARG_0,
ARG_THREADED,
};
/* signals */
enum
{
SIGNAL_NEW_DECODED_PAD,
SIGNAL_UNKNOWN_TYPE,
LAST_SIGNAL
};
typedef struct
{
gint np_sig_id;
gint nmp_sig_id;
GstElement *element;
GstDecodeBin *decode_bin;
}
GstDynamic;
static void gst_decode_bin_class_init (GstDecodeBinClass * klass);
static void gst_decode_bin_init (GstDecodeBin * decode_bin);
static void gst_decode_bin_dispose (GObject * object);
static void gst_decode_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * spec);
static void gst_decode_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * spec);
static GstElementStateReturn gst_decode_bin_change_state (GstElement * element);
static void type_found (GstElement * typefind, guint probability,
GstCaps * caps, GstDecodeBin * decode_bin);
static GstElement *try_to_link_1 (GstDecodeBin * decode_bin, GstPad * pad,
GList * factories);
static void close_link (GstElement * element, GstDecodeBin * decode_bin);
static void close_pad_link (GstElement * element, GstPad * pad,
GstCaps * caps, GstDecodeBin * decode_bin);
static GstElementClass *parent_class;
static guint gst_decode_bin_signals[LAST_SIGNAL] = { 0 };
static GstElementDetails gst_decode_bin_details = {
"Decoder Bin",
"Generic/Bin/Decoder",
"Autoplug and decode to raw media",
"Wim Taymans <wim@fluendo.com>"
};
static GType
gst_decode_bin_get_type (void)
{
static GType gst_decode_bin_type = 0;
if (!gst_decode_bin_type) {
static const GTypeInfo gst_decode_bin_info = {
sizeof (GstDecodeBinClass),
NULL,
NULL,
(GClassInitFunc) gst_decode_bin_class_init,
NULL,
NULL,
sizeof (GstDecodeBin),
0,
(GInstanceInitFunc) gst_decode_bin_init,
NULL
};
gst_decode_bin_type =
g_type_register_static (GST_TYPE_BIN, "GstDecodeBin",
&gst_decode_bin_info, 0);
}
return gst_decode_bin_type;
}
static void
gst_decode_bin_class_init (GstDecodeBinClass * klass)
{
GObjectClass *gobject_klass;
GstElementClass *gstelement_klass;
GstBinClass *gstbin_klass;
gobject_klass = (GObjectClass *) klass;
gstelement_klass = (GstElementClass *) klass;
gstbin_klass = (GstBinClass *) klass;
parent_class = g_type_class_ref (gst_bin_get_type ());
gobject_klass->set_property = gst_decode_bin_set_property;
gobject_klass->get_property = gst_decode_bin_get_property;
g_object_class_install_property (gobject_klass, ARG_THREADED,
g_param_spec_boolean ("threaded", "Threaded", "Use threads",
FALSE, G_PARAM_READWRITE));
gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD] =
g_signal_new ("new-decoded-pad", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstDecodeBinClass, new_decoded_pad), NULL, NULL,
gst_marshal_VOID__OBJECT_POINTER, G_TYPE_NONE, 2, G_TYPE_OBJECT,
G_TYPE_BOOLEAN);
gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] =
g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, unknown_type),
NULL, NULL, gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_CAPS);
gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_decode_bin_dispose);
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&decoder_bin_src_template));
gst_element_class_set_details (gstelement_klass, &gst_decode_bin_details);
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_decode_bin_change_state);
}
static gboolean
gst_decode_bin_is_dynamic (GstDecodeBin * decode_bin)
{
return decode_bin->dynamics != NULL;
}
static gboolean
gst_decode_bin_factory_filter (GstPluginFeature * feature,
GstDecodeBin * decode_bin)
{
guint rank;
const gchar *klass;
if (!GST_IS_ELEMENT_FACTORY (feature))
return FALSE;
klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
if (strstr (klass, "Demux") == NULL && strstr (klass, "Decoder") == NULL) {
return FALSE;
}
rank = gst_plugin_feature_get_rank (feature);
if (rank < GST_RANK_MARGINAL)
return FALSE;
return TRUE;
}
static gint
compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
{
return gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
}
static void
print_feature (GstPluginFeature * feature)
{
GST_DEBUG ("%s", gst_plugin_feature_get_name (feature));
}
static void
gst_decode_bin_init (GstDecodeBin * decode_bin)
{
GList *factories;
factories = gst_registry_pool_feature_filter (
(GstPluginFeatureFilter) gst_decode_bin_factory_filter,
FALSE, decode_bin);
decode_bin->factories = g_list_sort (factories, (GCompareFunc) compare_ranks);
g_list_foreach (decode_bin->factories, (GFunc) print_feature, NULL);
decode_bin->typefind = gst_element_factory_make ("typefind", "typefind");
if (!decode_bin->typefind) {
g_warning ("can't find typefind element");
}
gst_bin_add (GST_BIN (decode_bin), decode_bin->typefind);
gst_element_add_ghost_pad (GST_ELEMENT (decode_bin),
gst_element_get_pad (decode_bin->typefind, "sink"), "sink");
decode_bin->have_type_id =
g_signal_connect (G_OBJECT (decode_bin->typefind), "have_type",
G_CALLBACK (type_found), decode_bin);
decode_bin->dynamics = NULL;
}
static void
gst_decode_bin_dispose (GObject * object)
{
GstDecodeBin *decode_bin;
GList *dyns;
decode_bin = GST_DECODE_BIN (object);
g_signal_handler_disconnect (G_OBJECT (decode_bin->typefind),
decode_bin->have_type_id);
gst_bin_remove (GST_BIN (decode_bin), decode_bin->typefind);
g_list_free (decode_bin->factories);
for (dyns = decode_bin->dynamics; dyns; dyns = g_list_next (dyns)) {
GstDynamic *dynamic = (GstDynamic *) dyns->data;
g_free (dynamic);
}
g_list_free (decode_bin->dynamics);
decode_bin->dynamics = NULL;
if (G_OBJECT_CLASS (parent_class)->dispose) {
G_OBJECT_CLASS (parent_class)->dispose (object);
}
}
static GList *
find_compatibles (GstDecodeBin * decode_bin, const GstCaps * caps)
{
GList *factories;
GList *to_try = NULL;
for (factories = decode_bin->factories; factories;
factories = g_list_next (factories)) {
GstElementFactory *factory = GST_ELEMENT_FACTORY (factories->data);
const GList *templates;
GList *walk;
templates = gst_element_factory_get_pad_templates (factory);
for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
GstPadTemplate *templ = GST_PAD_TEMPLATE (walk->data);
if (templ->direction == GST_PAD_SINK) {
GstCaps *intersect;
intersect =
gst_caps_intersect (caps, gst_pad_template_get_caps (templ));
if (!gst_caps_is_empty (intersect)) {
to_try = g_list_append (to_try, factory);
}
gst_caps_free (intersect);
}
}
}
return to_try;
}
static void
close_pad_link (GstElement * element, GstPad * pad, GstCaps * caps,
GstDecodeBin * decode_bin)
{
GList *to_try;
GstStructure *structure;
const gchar *mimetype;
if (gst_caps_is_empty (caps)) {
g_signal_emit (G_OBJECT (decode_bin),
gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, caps);
return;
}
structure = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (structure);
/* first see if this is raw */
if (g_str_has_prefix (mimetype, "video/x-raw") ||
g_str_has_prefix (mimetype, "audio/x-raw")) {
gchar *padname;
GstPad *ghost;
gboolean dynamic;
padname = g_strdup_printf ("src%d", decode_bin->numpads);
decode_bin->numpads++;
gst_element_add_ghost_pad (GST_ELEMENT (decode_bin), pad, padname);
ghost = gst_element_get_pad (GST_ELEMENT (decode_bin), padname);
dynamic = gst_decode_bin_is_dynamic (decode_bin);
/* our own signal with an extra flag that this is the only pad */
g_signal_emit (G_OBJECT (decode_bin),
gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD], 0, ghost, !dynamic);
g_free (padname);
return;
}
/* then continue plugging */
to_try = find_compatibles (decode_bin, caps);
if (to_try == NULL) {
g_signal_emit (G_OBJECT (decode_bin),
gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, caps);
return;
}
try_to_link_1 (decode_bin, pad, to_try);
}
static GstElement *
try_to_link_1 (GstDecodeBin * decode_bin, GstPad * pad, GList * factories)
{
GList *walk;
for (walk = factories; walk; walk = g_list_next (walk)) {
GstElementFactory *factory = GST_ELEMENT_FACTORY (walk->data);
GstElement *element;
gboolean ret;
GST_DEBUG ("trying to link %s",
gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
element = gst_element_factory_create (factory, NULL);
if (element == NULL)
continue;
GST_DEBUG ("adding %s", gst_element_get_name (element));
gst_bin_add (GST_BIN (decode_bin), element);
decode_bin->elements = g_list_prepend (decode_bin->elements, element);
ret = gst_pad_link (pad, gst_element_get_pad (element, "sink"));
if (ret) {
const gchar *klass;
GstElementFactory *factory;
factory = gst_element_get_factory (element);
klass = gst_element_factory_get_klass (factory);
if (decode_bin->threaded) {
if (strstr (klass, "Demux") != NULL) {
/* FIXME, do something with threads here */
}
}
close_link (element, decode_bin);
gst_element_sync_state_with_parent (element);
return element;
} else {
gst_bin_remove (GST_BIN (decode_bin), element);
}
}
return NULL;
}
static void
new_pad (GstElement * element, GstPad * pad, GstDynamic * dynamic)
{
close_pad_link (element, pad, gst_pad_get_caps (pad), dynamic->decode_bin);
}
static void
no_more_pads (GstElement * element, GstDynamic * dynamic)
{
GstDecodeBin *decode_bin = dynamic->decode_bin;
GST_DEBUG ("decodebin: no more pads");
g_signal_handler_disconnect (G_OBJECT (dynamic->element), dynamic->np_sig_id);
g_signal_handler_disconnect (G_OBJECT (dynamic->element),
dynamic->nmp_sig_id);
decode_bin->dynamics = g_list_remove (decode_bin->dynamics, dynamic);
g_free (dynamic);
if (decode_bin->dynamics == NULL)
gst_element_no_more_pads (GST_ELEMENT (decode_bin));
}
static void
close_link (GstElement * element, GstDecodeBin * decode_bin)
{
GList *pads;
gboolean dynamic = FALSE;
GList *to_connect = NULL;
for (pads = gst_element_get_pad_template_list (element); pads;
pads = g_list_next (pads)) {
GstPadTemplate *templ = GST_PAD_TEMPLATE (pads->data);
if (GST_PAD_TEMPLATE_DIRECTION (templ) != GST_PAD_SRC)
continue;
switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
case GST_PAD_ALWAYS:
{
GstPad *pad = gst_element_get_pad (element,
GST_PAD_TEMPLATE_NAME_TEMPLATE (templ));
if (pad) {
to_connect = g_list_prepend (to_connect, pad);
}
break;
}
case GST_PAD_SOMETIMES:
{
GstPad *pad = gst_element_get_pad (element,
GST_PAD_TEMPLATE_NAME_TEMPLATE (templ));
if (pad) {
to_connect = g_list_prepend (to_connect, pad);
} else {
dynamic = TRUE;
}
break;
}
case GST_PAD_REQUEST:
break;
}
}
if (dynamic) {
GstDynamic *dyn;
dyn = g_new0 (GstDynamic, 1);
dyn->np_sig_id = g_signal_connect (G_OBJECT (element), "new-pad",
G_CALLBACK (new_pad), dyn);
dyn->nmp_sig_id = g_signal_connect (G_OBJECT (element), "no-more-pads",
G_CALLBACK (no_more_pads), dyn);
dyn->element = element;
dyn->decode_bin = decode_bin;
decode_bin->dynamics = g_list_prepend (decode_bin->dynamics, dyn);
}
for (pads = to_connect; pads; pads = g_list_next (pads)) {
GstPad *pad = GST_PAD (pads->data);
close_pad_link (element, pad, gst_pad_get_caps (pad), decode_bin);
}
g_list_free (to_connect);
}
static void
type_found (GstElement * typefind, guint probability, GstCaps * caps,
GstDecodeBin * decode_bin)
{
gboolean dynamic;
close_pad_link (typefind, gst_element_get_pad (typefind, "src"), caps,
decode_bin);
dynamic = gst_decode_bin_is_dynamic (decode_bin);
if (dynamic == FALSE) {
gst_element_no_more_pads (GST_ELEMENT (decode_bin));
}
}
static void
gst_decode_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDecodeBin *decode_bin;
g_return_if_fail (GST_IS_DECODE_BIN (object));
decode_bin = GST_DECODE_BIN (object);
switch (prop_id) {
case ARG_THREADED:
decode_bin->threaded = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_decode_bin_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstDecodeBin *decode_bin;
g_return_if_fail (GST_IS_DECODE_BIN (object));
decode_bin = GST_DECODE_BIN (object);
switch (prop_id) {
case ARG_THREADED:
g_value_set_boolean (value, decode_bin->threaded);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_decode_bin_change_state (GstElement * element)
{
GstElementStateReturn ret;
GstDecodeBin *decode_bin;
gint transition;
decode_bin = GST_DECODE_BIN (element);
transition = GST_STATE_TRANSITION (element);
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
if (ret != GST_STATE_SUCCESS) {
return ret;
}
switch (transition) {
case GST_STATE_NULL_TO_READY:
decode_bin->numpads = 0;
decode_bin->threaded = FALSE;
decode_bin->dynamics = NULL;
break;
case GST_STATE_READY_TO_PAUSED:
case GST_STATE_PAUSED_TO_PLAYING:
case GST_STATE_PLAYING_TO_PAUSED:
case GST_STATE_PAUSED_TO_READY:
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_decode_bin_debug, "decodebin", 0, "decoder bin");
return gst_element_register (plugin, "decodebin", GST_RANK_NONE,
GST_TYPE_DECODE_BIN);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"decodebin",
"decoder bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)