gstreamer/gst/gstutils.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2002 Thomas Vander Stichele <thomas@apestaart.org>
*
* gstutils.c: Utility functions
*
* 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.
*/
/**
* SECTION:gstutils
* @short_description: Various utility functions
*
* When defining own plugins, use the GST_BOILERPLATE ease gobject creation.
*/
#include "gst_private.h"
#include <stdio.h>
#include <string.h>
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
#include "gstghostpad.h"
#include "gstutils.h"
#include "gsterror.h"
#include "gstinfo.h"
#include "gstparse.h"
#include "gstvalue.h"
#include "gst-i18n-lib.h"
/**
* gst_util_dump_mem:
* @mem: a pointer to the memory to dump
* @size: the size of the memory block to dump
*
* Dumps the memory block into a hex representation. Useful for debugging.
*/
void
gst_util_dump_mem (const guchar * mem, guint size)
{
guint i, j;
GString *string = g_string_sized_new (50);
GString *chars = g_string_sized_new (18);
i = j = 0;
while (i < size) {
if (g_ascii_isprint (mem[i]))
g_string_append_c (chars, mem[i]);
else
g_string_append_c (chars, '.');
g_string_append_printf (string, "%02x ", mem[i]);
j++;
i++;
if (j == 16 || i == size) {
g_print ("%08x (%p): %-48.48s %-16.16s\n", i - j, mem + i - j,
string->str, chars->str);
g_string_set_size (string, 0);
g_string_set_size (chars, 0);
j = 0;
}
}
g_string_free (string, TRUE);
g_string_free (chars, TRUE);
}
/**
* gst_util_set_value_from_string:
* @value: the value to set
* @value_str: the string to get the value from
*
* Converts the string to the type of the value and
* sets the value with it.
*
* Note that this function is dangerous as it does not return any indication
* if the conversion worked or not.
*/
void
gst_util_set_value_from_string (GValue * value, const gchar * value_str)
{
gboolean res;
g_return_if_fail (value != NULL);
g_return_if_fail (value_str != NULL);
GST_CAT_DEBUG (GST_CAT_PARAMS, "parsing '%s' to type %s", value_str,
g_type_name (G_VALUE_TYPE (value)));
res = gst_value_deserialize (value, value_str);
if (!res && G_VALUE_TYPE (value) == G_TYPE_BOOLEAN) {
/* backwards compat, all booleans that fail to parse are false */
g_value_set_boolean (value, FALSE);
res = TRUE;
}
g_return_if_fail (res);
}
/**
* gst_util_set_object_arg:
* @object: the object to set the argument of
* @name: the name of the argument to set
* @value: the string value to set
*
* Convertes the string value to the type of the objects argument and
* sets the argument with it.
*
* Note that this function silently returns if @object has no property named
* @name or when @value cannot be converted to the type of the property.
*/
void
gst_util_set_object_arg (GObject * object, const gchar * name,
const gchar * value)
{
GParamSpec *pspec;
GType value_type;
GValue v = { 0, };
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (name != NULL);
g_return_if_fail (value != NULL);
pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object), name);
if (!pspec)
return;
value_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
GST_DEBUG ("pspec->flags is %d, pspec->value_type is %d",
pspec->flags, (gint) value_type);
if (!(pspec->flags & G_PARAM_WRITABLE))
return;
g_value_init (&v, value_type);
if (!gst_value_deserialize (&v, value))
return;
g_object_set_property (object, pspec->name, &v);
g_value_unset (&v);
}
/* work around error C2520: conversion from unsigned __int64 to double
* not implemented, use signed __int64
*
* These are implemented as functions because on some platforms a 64bit int to
* double conversion is not defined/implemented.
*/
gdouble
gst_util_guint64_to_gdouble (guint64 value)
{
if (value & G_GINT64_CONSTANT (0x8000000000000000))
return (gdouble) ((gint64) value) + (gdouble) 18446744073709551616.;
else
return (gdouble) ((gint64) value);
}
guint64
gst_util_gdouble_to_guint64 (gdouble value)
{
if (value < (gdouble) 9223372036854775808.) /* 1 << 63 */
return ((guint64) ((gint64) value));
value -= (gdouble) 18446744073709551616.;
return ((guint64) ((gint64) value));
}
/* convenience struct for getting high and low uint32 parts of
* a guint64 */
typedef union
{
guint64 ll;
struct
{
#if G_BYTE_ORDER == G_BIG_ENDIAN
guint32 high, low;
#else
guint32 low, high;
#endif
} l;
} GstUInt64;
/* based on Hacker's Delight p152 */
static guint64
gst_util_div128_64 (GstUInt64 c1, GstUInt64 c0, guint64 denom)
{
GstUInt64 q1, q0, rhat;
GstUInt64 v, cmp1, cmp2;
guint s;
v.ll = denom;
/* count number of leading zeroes, we know they must be in the high
* part of denom since denom > G_MAXUINT32. */
s = v.l.high | (v.l.high >> 1);
s |= (s >> 2);
s |= (s >> 4);
s |= (s >> 8);
s = ~(s | (s >> 16));
s = s - ((s >> 1) & 0x55555555);
s = (s & 0x33333333) + ((s >> 2) & 0x33333333);
s = (s + (s >> 4)) & 0x0f0f0f0f;
s += (s >> 8);
s = (s + (s >> 16)) & 0x3f;
if (s > 0) {
/* normalize divisor and dividend */
v.ll <<= s;
c1.ll = (c1.ll << s) | (c0.l.high >> (32 - s));
c0.ll <<= s;
}
q1.ll = c1.ll / v.l.high;
rhat.ll = c1.ll - q1.ll * v.l.high;
cmp1.l.high = rhat.l.low;
cmp1.l.low = c0.l.high;
cmp2.ll = q1.ll * v.l.low;
while (q1.l.high || cmp2.ll > cmp1.ll) {
q1.ll--;
rhat.ll += v.l.high;
if (rhat.l.high)
break;
cmp1.l.high = rhat.l.low;
cmp2.ll -= v.l.low;
}
c1.l.high = c1.l.low;
c1.l.low = c0.l.high;
c1.ll -= q1.ll * v.ll;
q0.ll = c1.ll / v.l.high;
rhat.ll = c1.ll - q0.ll * v.l.high;
cmp1.l.high = rhat.l.low;
cmp1.l.low = c0.l.low;
cmp2.ll = q0.ll * v.l.low;
while (q0.l.high || cmp2.ll > cmp1.ll) {
q0.ll--;
rhat.ll += v.l.high;
if (rhat.l.high)
break;
cmp1.l.high = rhat.l.low;
cmp2.ll -= v.l.low;
}
q0.l.high += q1.l.low;
return q0.ll;
}
static guint64
gst_util_uint64_scale_int64 (guint64 val, guint64 num, guint64 denom)
{
GstUInt64 a0, a1, b0, b1, c0, ct, c1, result;
GstUInt64 v, n;
/* prepare input */
v.ll = val;
n.ll = num;
/* do 128 bits multiply
* nh nl
* * vh vl
* ----------
* a0 = vl * nl
* a1 = vl * nh
* b0 = vh * nl
* b1 = + vh * nh
* -------------------
* c1,c0
*/
a0.ll = (guint64) v.l.low * n.l.low;
a1.ll = (guint64) v.l.low * n.l.high;
b0.ll = (guint64) v.l.high * n.l.low;
b1.ll = (guint64) v.l.high * n.l.high;
/* and sum together with carry into 128 bits c1, c0 */
c0.l.low = a0.l.low;
ct.ll = (guint64) a0.l.high + a1.l.low + b0.l.low;
c0.l.high = ct.l.low;
c1.ll = (guint64) a1.l.high + b0.l.high + ct.l.high + b1.ll;
/* if high bits bigger than denom, we overflow */
if (c1.ll >= denom)
goto overflow;
/* shortcut for division by 1, c1.ll should be 0 because of the
* overflow check above. */
if (denom == 1)
return c0.ll;
/* and 128/64 bits division, result fits 64 bits */
if (denom <= G_MAXUINT32) {
guint32 den = (guint32) denom;
/* easy case, (c1,c0)128/(den)32 division */
c1.l.high %= den;
c1.l.high = c1.ll % den;
c1.l.low = c0.l.high;
c0.l.high = c1.ll % den;
result.l.high = c1.ll / den;
result.l.low = c0.ll / den;
} else {
result.ll = gst_util_div128_64 (c1, c0, denom);
}
return result.ll;
overflow:
{
return G_MAXUINT64;
}
}
/**
* gst_util_uint64_scale:
* @val: the number to scale
* @num: the numerator of the scale ratio
* @denom: the denominator of the scale ratio
*
* Scale @val by @num / @denom, trying to avoid overflows.
*
* This function can potentially be very slow if denom > G_MAXUINT32.
*
* Returns: @val * @num / @denom, trying to avoid overflows.
* In the case of an overflow, this function returns G_MAXUINT64.
*/
guint64
gst_util_uint64_scale (guint64 val, guint64 num, guint64 denom)
{
g_return_val_if_fail (denom != 0, G_MAXUINT64);
if (num == 0)
return 0;
if (num == 1 && denom == 1)
return val;
/* if the denom is high, we need to do a 64 muldiv */
if (denom > G_MAXINT32)
goto do_int64;
/* if num and denom are low we can do a 32 bit muldiv */
if (num <= G_MAXINT32)
goto do_int32;
/* val and num are high, we need 64 muldiv */
if (val > G_MAXINT32)
goto do_int64;
/* val is low and num is high, we can swap them and do 32 muldiv */
return gst_util_uint64_scale_int (num, (gint) val, (gint) denom);
do_int32:
return gst_util_uint64_scale_int (val, (gint) num, (gint) denom);
do_int64:
/* to the more heavy implementations... */
return gst_util_uint64_scale_int64 (val, num, denom);
}
/**
* gst_util_uint64_scale_int:
* @val: guint64 (such as a #GstClockTime) to scale.
* @num: numerator of the scale factor.
* @denom: denominator of the scale factor.
*
* Scale a guint64 by a factor expressed as a fraction (num/denom), avoiding
* overflows and loss of precision.
*
* @num and @denom must be positive integers. @denom cannot be 0.
*
* Returns: @val * @num / @denom, avoiding overflow and loss of precision.
* In the case of an overflow, this function returns G_MAXUINT64.
*/
guint64
gst_util_uint64_scale_int (guint64 val, gint num, gint denom)
{
GstUInt64 result;
GstUInt64 low, high;
g_return_val_if_fail (denom > 0, G_MAXUINT64);
g_return_val_if_fail (num >= 0, G_MAXUINT64);
if (num == 0)
return 0;
if (num == 1 && denom == 1)
return val;
if (val <= G_MAXUINT32)
/* simple case */
return val * num / denom;
/* do 96 bits mult/div */
low.ll = val;
result.ll = ((guint64) low.l.low) * num;
high.ll = ((guint64) low.l.high) * num + (result.l.high);
low.ll = high.ll / denom;
result.l.high = high.ll % denom;
result.ll /= denom;
/* avoid overflow */
if (low.ll + result.l.high > G_MAXUINT32)
goto overflow;
result.l.high += low.l.low;
return result.ll;
overflow:
{
return G_MAXUINT64;
}
}
/**
* gst_util_seqnum_next:
*
* Return a constantly incrementing sequence number.
*
* This function is used internally to GStreamer to be able to determine which
* events and messages are "the same". For example, elements may set the seqnum
* on a segment-done message to be the same as that of the last seek event, to
* indicate that event and the message correspond to the same segment.
*
* Returns: A constantly incrementing 32-bit unsigned integer, which might
* overflow back to 0 at some point. Use gst_util_seqnum_compare() to make sure
* you handle wraparound correctly.
*
* Since: 0.10.22
*/
guint32
gst_util_seqnum_next (void)
{
static gint counter = 0;
return g_atomic_int_exchange_and_add (&counter, 1);
}
/**
* gst_util_seqnum_compare:
* @s1: A sequence number.
* @s2: Another sequence number.
*
* Compare two sequence numbers, handling wraparound.
*
* The current implementation just returns (gint32)(@s1 - @s2).
*
* Returns: A negative number if @s1 is before @s2, 0 if they are equal, or a
* positive number if @s1 is after @s2.
*
* Since: 0.10.22
*/
gint32
gst_util_seqnum_compare (guint32 s1, guint32 s2)
{
return (gint32) (s1 - s2);
}
/* -----------------------------------------------------
*
* The following code will be moved out of the main
* gstreamer library someday.
*/
#include "gstpad.h"
static void
string_append_indent (GString * str, gint count)
{
gint xx;
for (xx = 0; xx < count; xx++)
g_string_append_c (str, ' ');
}
/**
* gst_print_pad_caps:
* @buf: the buffer to print the caps in
* @indent: initial indentation
* @pad: the pad to print the caps from
*
* Write the pad capabilities in a human readable format into
* the given GString.
*/
void
gst_print_pad_caps (GString * buf, gint indent, GstPad * pad)
{
GstCaps *caps;
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
caps = pad->caps;
if (!caps) {
string_append_indent (buf, indent);
g_string_printf (buf, "%s:%s has no capabilities",
GST_DEBUG_PAD_NAME (pad));
} else {
char *s;
s = gst_caps_to_string (caps);
g_string_append (buf, s);
g_free (s);
}
}
/**
* gst_print_element_args:
* @buf: the buffer to print the args in
* @indent: initial indentation
* @element: the element to print the args of
*
* Print the element argument in a human readable format in the given
* GString.
*/
void
gst_print_element_args (GString * buf, gint indent, GstElement * element)
{
guint width;
GValue value = { 0, }; /* the important thing is that value.type = 0 */
gchar *str = NULL;
GParamSpec *spec, **specs, **walk;
specs = g_object_class_list_properties (G_OBJECT_GET_CLASS (element), NULL);
width = 0;
for (walk = specs; *walk; walk++) {
spec = *walk;
if (width < strlen (spec->name))
width = strlen (spec->name);
}
for (walk = specs; *walk; walk++) {
spec = *walk;
if (spec->flags & G_PARAM_READABLE) {
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (spec));
g_object_get_property (G_OBJECT (element), spec->name, &value);
str = g_strdup_value_contents (&value);
g_value_unset (&value);
} else {
str = g_strdup ("Parameter not readable.");
}
string_append_indent (buf, indent);
g_string_append (buf, spec->name);
string_append_indent (buf, 2 + width - strlen (spec->name));
g_string_append (buf, str);
g_string_append_c (buf, '\n');
g_free (str);
}
g_free (specs);
}
/**
* gst_element_create_all_pads:
* @element: a #GstElement to create pads for
*
* Creates a pad for each pad template that is always available.
* This function is only useful during object intialization of
* subclasses of #GstElement.
*/
void
gst_element_create_all_pads (GstElement * element)
{
GList *padlist;
/* FIXME: lock element */
padlist =
gst_element_class_get_pad_template_list (GST_ELEMENT_CLASS
(G_OBJECT_GET_CLASS (element)));
while (padlist) {
GstPadTemplate *padtempl = (GstPadTemplate *) padlist->data;
if (padtempl->presence == GST_PAD_ALWAYS) {
GstPad *pad;
pad = gst_pad_new_from_template (padtempl, padtempl->name_template);
gst_element_add_pad (element, pad);
}
padlist = padlist->next;
}
}
/**
* gst_element_get_compatible_pad_template:
* @element: a #GstElement to get a compatible pad template for.
* @compattempl: the #GstPadTemplate to find a compatible template for.
*
* Retrieves a pad template from @element that is compatible with @compattempl.
* Pads from compatible templates can be linked together.
*
* Returns: a compatible #GstPadTemplate, or NULL if none was found. No
* unreferencing is necessary.
*/
GstPadTemplate *
gst_element_get_compatible_pad_template (GstElement * element,
GstPadTemplate * compattempl)
{
GstPadTemplate *newtempl = NULL;
GList *padlist;
GstElementClass *class;
g_return_val_if_fail (element != NULL, NULL);
g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
g_return_val_if_fail (compattempl != NULL, NULL);
class = GST_ELEMENT_GET_CLASS (element);
padlist = gst_element_class_get_pad_template_list (class);
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"Looking for a suitable pad template in %s out of %d templates...",
GST_ELEMENT_NAME (element), g_list_length (padlist));
while (padlist) {
GstPadTemplate *padtempl = (GstPadTemplate *) padlist->data;
GstCaps *intersection;
/* Ignore name
* Ignore presence
* Check direction (must be opposite)
* Check caps
*/
GST_CAT_LOG (GST_CAT_CAPS,
"checking pad template %s", padtempl->name_template);
if (padtempl->direction != compattempl->direction) {
GST_CAT_DEBUG (GST_CAT_CAPS,
"compatible direction: found %s pad template \"%s\"",
padtempl->direction == GST_PAD_SRC ? "src" : "sink",
padtempl->name_template);
GST_CAT_DEBUG (GST_CAT_CAPS,
"intersecting %" GST_PTR_FORMAT, GST_PAD_TEMPLATE_CAPS (compattempl));
GST_CAT_DEBUG (GST_CAT_CAPS,
"..and %" GST_PTR_FORMAT, GST_PAD_TEMPLATE_CAPS (padtempl));
intersection = gst_caps_intersect (GST_PAD_TEMPLATE_CAPS (compattempl),
GST_PAD_TEMPLATE_CAPS (padtempl));
GST_CAT_DEBUG (GST_CAT_CAPS, "caps are %scompatible %" GST_PTR_FORMAT,
(intersection ? "" : "not "), intersection);
if (!gst_caps_is_empty (intersection))
newtempl = padtempl;
gst_caps_unref (intersection);
if (newtempl)
break;
}
padlist = g_list_next (padlist);
}
if (newtempl)
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"Returning new pad template %p", newtempl);
else
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "No compatible pad template found");
return newtempl;
}
static GstPad *
gst_element_request_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name)
{
GstPad *newpad = NULL;
GstElementClass *oclass;
oclass = GST_ELEMENT_GET_CLASS (element);
if (oclass->request_new_pad)
newpad = (oclass->request_new_pad) (element, templ, name);
if (newpad)
gst_object_ref (newpad);
return newpad;
}
/**
* gst_element_get_pad_from_template:
* @element: a #GstElement.
* @templ: a #GstPadTemplate belonging to @element.
*
* Gets a pad from @element described by @templ. If the presence of @templ is
* #GST_PAD_REQUEST, requests a new pad. Can return %NULL for #GST_PAD_SOMETIMES
* templates.
*
* Returns: the #GstPad, or NULL if one could not be found or created.
*/
static GstPad *
gst_element_get_pad_from_template (GstElement * element, GstPadTemplate * templ)
{
GstPad *ret = NULL;
GstPadPresence presence;
/* If this function is ever exported, we need check the validity of `element'
* and `templ', and to make sure the template actually belongs to the
* element. */
presence = GST_PAD_TEMPLATE_PRESENCE (templ);
switch (presence) {
case GST_PAD_ALWAYS:
case GST_PAD_SOMETIMES:
ret = gst_element_get_static_pad (element, templ->name_template);
if (!ret && presence == GST_PAD_ALWAYS)
g_warning
("Element %s has an ALWAYS template %s, but no pad of the same name",
GST_OBJECT_NAME (element), templ->name_template);
break;
case GST_PAD_REQUEST:
ret = gst_element_request_pad (element, templ, NULL);
break;
}
return ret;
}
/**
* gst_element_request_compatible_pad:
* @element: a #GstElement.
* @templ: the #GstPadTemplate to which the new pad should be able to link.
*
* Requests a pad from @element. The returned pad should be unlinked and
* compatible with @templ. Might return an existing pad, or request a new one.
*
* Returns: a #GstPad, or %NULL if one could not be found or created.
*/
GstPad *
gst_element_request_compatible_pad (GstElement * element,
GstPadTemplate * templ)
{
GstPadTemplate *templ_new;
GstPad *pad = NULL;
g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
g_return_val_if_fail (GST_IS_PAD_TEMPLATE (templ), NULL);
/* FIXME: should really loop through the templates, testing each for
* compatibility and pad availability. */
templ_new = gst_element_get_compatible_pad_template (element, templ);
if (templ_new)
pad = gst_element_get_pad_from_template (element, templ_new);
/* This can happen for non-request pads. No need to unref. */
if (pad && GST_PAD_PEER (pad))
pad = NULL;
return pad;
}
/*
* Checks if the source pad and the sink pad can be linked.
* Both @srcpad and @sinkpad must be unlinked and have a parent.
*/
static gboolean
gst_pad_check_link (GstPad * srcpad, GstPad * sinkpad)
{
/* FIXME This function is gross. It's almost a direct copy of
* gst_pad_link_filtered(). Any decent programmer would attempt
* to merge the two functions, which I will do some day. --ds
*/
/* generic checks */
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
GST_CAT_INFO (GST_CAT_PADS, "trying to link %s:%s and %s:%s",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
/* FIXME: shouldn't we convert this to g_return_val_if_fail? */
if (GST_PAD_PEER (srcpad) != NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Source pad %s:%s has a peer, failed",
GST_DEBUG_PAD_NAME (srcpad));
return FALSE;
}
if (GST_PAD_PEER (sinkpad) != NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Sink pad %s:%s has a peer, failed",
GST_DEBUG_PAD_NAME (sinkpad));
return FALSE;
}
if (!GST_PAD_IS_SRC (srcpad)) {
GST_CAT_INFO (GST_CAT_PADS, "Src pad %s:%s is not source pad, failed",
GST_DEBUG_PAD_NAME (srcpad));
return FALSE;
}
if (!GST_PAD_IS_SINK (sinkpad)) {
GST_CAT_INFO (GST_CAT_PADS, "Sink pad %s:%s is not sink pad, failed",
GST_DEBUG_PAD_NAME (sinkpad));
return FALSE;
}
if (GST_PAD_PARENT (srcpad) == NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Src pad %s:%s has no parent, failed",
GST_DEBUG_PAD_NAME (srcpad));
return FALSE;
}
if (GST_PAD_PARENT (sinkpad) == NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Sink pad %s:%s has no parent, failed",
GST_DEBUG_PAD_NAME (srcpad));
return FALSE;
}
return TRUE;
}
/**
* gst_element_get_compatible_pad:
* @element: a #GstElement in which the pad should be found.
* @pad: the #GstPad to find a compatible one for.
* @caps: the #GstCaps to use as a filter.
*
* Looks for an unlinked pad to which the given pad can link. It is not
* guaranteed that linking the pads will work, though it should work in most
* cases.
*
* Returns: the #GstPad to which a link can be made, or %NULL if one cannot be
* found. gst_object_unref() after usage.
*/
GstPad *
gst_element_get_compatible_pad (GstElement * element, GstPad * pad,
const GstCaps * caps)
{
GstIterator *pads;
GstPadTemplate *templ;
GstCaps *templcaps;
GstPad *foundpad = NULL;
gboolean done;
g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"finding pad in %s compatible with %s:%s",
GST_ELEMENT_NAME (element), GST_DEBUG_PAD_NAME (pad));
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
g_return_val_if_fail (GST_PAD_PEER (pad) == NULL, NULL);
done = FALSE;
/* try to get an existing unlinked pad */
pads = gst_element_iterate_pads (element);
while (!done) {
gpointer padptr;
switch (gst_iterator_next (pads, &padptr)) {
case GST_ITERATOR_OK:
{
GstPad *peer;
GstPad *current;
current = GST_PAD (padptr);
GST_CAT_LOG (GST_CAT_ELEMENT_PADS, "examining pad %s:%s",
GST_DEBUG_PAD_NAME (current));
peer = gst_pad_get_peer (current);
if (peer == NULL && gst_pad_check_link (pad, current)) {
GstCaps *temp, *temp2, *intersection;
/* Now check if the two pads' caps are compatible */
temp = gst_pad_get_caps (pad);
if (caps) {
intersection = gst_caps_intersect (temp, caps);
gst_caps_unref (temp);
} else {
intersection = temp;
}
temp = gst_pad_get_caps (current);
temp2 = gst_caps_intersect (temp, intersection);
gst_caps_unref (temp);
gst_caps_unref (intersection);
intersection = temp2;
if (!gst_caps_is_empty (intersection)) {
gst_caps_unref (intersection);
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"found existing unlinked compatible pad %s:%s",
GST_DEBUG_PAD_NAME (current));
gst_iterator_free (pads);
return current;
} else {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "incompatible pads");
}
gst_caps_unref (intersection);
} else {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"already linked or cannot be linked (peer = %p)", peer);
}
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "unreffing pads");
gst_object_unref (current);
if (peer)
gst_object_unref (peer);
break;
}
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (pads);
break;
case GST_ITERATOR_ERROR:
g_assert_not_reached ();
break;
}
}
gst_iterator_free (pads);
GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
"Could not find a compatible unlinked always pad to link to %s:%s, now checking request pads",
GST_DEBUG_PAD_NAME (pad));
/* try to create a new one */
/* requesting is a little crazy, we need a template. Let's create one */
/* FIXME: why not gst_pad_get_pad_template (pad); */
templcaps = gst_pad_get_caps (pad);
templ = gst_pad_template_new ((gchar *) GST_PAD_NAME (pad),
GST_PAD_DIRECTION (pad), GST_PAD_ALWAYS, templcaps);
foundpad = gst_element_request_compatible_pad (element, templ);
gst_object_unref (templ);
if (foundpad) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"found existing request pad %s:%s", GST_DEBUG_PAD_NAME (foundpad));
return foundpad;
}
GST_CAT_INFO_OBJECT (GST_CAT_ELEMENT_PADS, element,
"Could not find a compatible pad to link to %s:%s",
GST_DEBUG_PAD_NAME (pad));
return NULL;
}
/**
* gst_element_state_get_name:
* @state: a #GstState to get the name of.
*
* Gets a string representing the given state.
*
* Returns: a string with the name of the state.
*/
G_CONST_RETURN gchar *
gst_element_state_get_name (GstState state)
{
switch (state) {
#ifdef GST_DEBUG_COLOR
case GST_STATE_VOID_PENDING:
return "VOID_PENDING";
case GST_STATE_NULL:
return "\033[01;34mNULL\033[00m";
case GST_STATE_READY:
return "\033[01;31mREADY\033[00m";
case GST_STATE_PLAYING:
return "\033[01;32mPLAYING\033[00m";
case GST_STATE_PAUSED:
return "\033[01;33mPAUSED\033[00m";
default:
/* This is a memory leak */
return g_strdup_printf ("\033[01;35;41mUNKNOWN!\033[00m(%d)", state);
#else
case GST_STATE_VOID_PENDING:
return "VOID_PENDING";
case GST_STATE_NULL:
return "NULL";
case GST_STATE_READY:
return "READY";
case GST_STATE_PLAYING:
return "PLAYING";
case GST_STATE_PAUSED:
return "PAUSED";
default:
/* This is a memory leak */
return g_strdup_printf ("UNKNOWN!(%d)", state);
#endif
}
}
/**
* gst_element_state_change_return_get_name:
* @state_ret: a #GstStateChangeReturn to get the name of.
*
* Gets a string representing the given state change result.
*
* Returns: a string with the name of the state change result.
*
* Since: 0.10.11
*/
G_CONST_RETURN gchar *
gst_element_state_change_return_get_name (GstStateChangeReturn state_ret)
{
switch (state_ret) {
#ifdef GST_DEBUG_COLOR
case GST_STATE_CHANGE_FAILURE:
return "\033[01;31mFAILURE\033[00m";
case GST_STATE_CHANGE_SUCCESS:
return "\033[01;32mSUCCESS\033[00m";
case GST_STATE_CHANGE_ASYNC:
return "\033[01;33mASYNC\033[00m";
case GST_STATE_CHANGE_NO_PREROLL:
return "\033[01;34mNO_PREROLL\033[00m";
default:
/* This is a memory leak */
return g_strdup_printf ("\033[01;35;41mUNKNOWN!\033[00m(%d)", state_ret);
#else
case GST_STATE_CHANGE_FAILURE:
return "FAILURE";
case GST_STATE_CHANGE_SUCCESS:
return "SUCCESS";
case GST_STATE_CHANGE_ASYNC:
return "ASYNC";
case GST_STATE_CHANGE_NO_PREROLL:
return "NO PREROLL";
default:
/* This is a memory leak */
return g_strdup_printf ("UNKNOWN!(%d)", state_ret);
#endif
}
}
/**
* gst_element_factory_can_src_caps :
* @factory: factory to query
* @caps: the caps to check
*
* Checks if the factory can source the given capability.
*
* Returns: true if it can src the capabilities
*/
gboolean
gst_element_factory_can_src_caps (GstElementFactory * factory,
const GstCaps * caps)
{
GList *templates;
g_return_val_if_fail (factory != NULL, FALSE);
g_return_val_if_fail (caps != NULL, FALSE);
templates = factory->staticpadtemplates;
while (templates) {
GstStaticPadTemplate *template = (GstStaticPadTemplate *) templates->data;
if (template->direction == GST_PAD_SRC) {
if (gst_caps_is_always_compatible (gst_static_caps_get
(&template->static_caps), caps))
return TRUE;
}
templates = g_list_next (templates);
}
return FALSE;
}
/**
* gst_element_factory_can_sink_caps :
* @factory: factory to query
* @caps: the caps to check
*
* Checks if the factory can sink the given capability.
*
* Returns: true if it can sink the capabilities
*/
gboolean
gst_element_factory_can_sink_caps (GstElementFactory * factory,
const GstCaps * caps)
{
GList *templates;
g_return_val_if_fail (factory != NULL, FALSE);
g_return_val_if_fail (caps != NULL, FALSE);
templates = factory->staticpadtemplates;
while (templates) {
GstStaticPadTemplate *template = (GstStaticPadTemplate *) templates->data;
if (template->direction == GST_PAD_SINK) {
if (gst_caps_is_always_compatible (caps,
gst_static_caps_get (&template->static_caps)))
return TRUE;
}
templates = g_list_next (templates);
}
return FALSE;
}
/* if return val is true, *direct_child is a caller-owned ref on the direct
* child of ancestor that is part of object's ancestry */
static gboolean
object_has_ancestor (GstObject * object, GstObject * ancestor,
GstObject ** direct_child)
{
GstObject *child, *parent;
if (direct_child)
*direct_child = NULL;
child = gst_object_ref (object);
parent = gst_object_get_parent (object);
while (parent) {
if (ancestor == parent) {
if (direct_child)
*direct_child = child;
else
gst_object_unref (child);
gst_object_unref (parent);
return TRUE;
}
gst_object_unref (child);
child = parent;
parent = gst_object_get_parent (parent);
}
gst_object_unref (child);
return FALSE;
}
/* caller owns return */
static GstObject *
find_common_root (GstObject * o1, GstObject * o2)
{
GstObject *top = o1;
GstObject *kid1, *kid2;
GstObject *root = NULL;
while (GST_OBJECT_PARENT (top))
top = GST_OBJECT_PARENT (top);
/* the itsy-bitsy spider... */
if (!object_has_ancestor (o2, top, &kid2))
return NULL;
root = gst_object_ref (top);
while (TRUE) {
if (!object_has_ancestor (o1, kid2, &kid1)) {
gst_object_unref (kid2);
return root;
}
root = kid2;
if (!object_has_ancestor (o2, kid1, &kid2)) {
gst_object_unref (kid1);
return root;
}
root = kid1;
}
}
/* caller does not own return */
static GstPad *
ghost_up (GstElement * e, GstPad * pad)
{
static gint ghost_pad_index = 0;
GstPad *gpad;
gchar *name;
GstObject *parent = GST_OBJECT_PARENT (e);
name = g_strdup_printf ("ghost%d", ghost_pad_index++);
gpad = gst_ghost_pad_new (name, pad);
g_free (name);
if (!gst_element_add_pad ((GstElement *) parent, gpad)) {
g_warning ("Pad named %s already exists in element %s\n",
GST_OBJECT_NAME (gpad), GST_OBJECT_NAME (parent));
gst_object_unref ((GstObject *) gpad);
return NULL;
}
return gpad;
}
static void
remove_pad (gpointer ppad, gpointer unused)
{
GstPad *pad = ppad;
if (!gst_element_remove_pad ((GstElement *) GST_OBJECT_PARENT (pad), pad))
g_warning ("Couldn't remove pad %s from element %s",
GST_OBJECT_NAME (pad), GST_OBJECT_NAME (GST_OBJECT_PARENT (pad)));
}
static gboolean
prepare_link_maybe_ghosting (GstPad ** src, GstPad ** sink,
GSList ** pads_created)
{
GstObject *root;
GstObject *e1, *e2;
GSList *pads_created_local = NULL;
g_assert (pads_created);
e1 = GST_OBJECT_PARENT (*src);
e2 = GST_OBJECT_PARENT (*sink);
if (G_UNLIKELY (e1 == NULL)) {
GST_WARNING ("Trying to ghost a pad that doesn't have a parent: %"
GST_PTR_FORMAT, *src);
return FALSE;
}
if (G_UNLIKELY (e2 == NULL)) {
GST_WARNING ("Trying to ghost a pad that doesn't have a parent: %"
GST_PTR_FORMAT, *sink);
return FALSE;
}
if (GST_OBJECT_PARENT (e1) == GST_OBJECT_PARENT (e2)) {
GST_CAT_INFO (GST_CAT_PADS, "%s and %s in same bin, no need for ghost pads",
GST_OBJECT_NAME (e1), GST_OBJECT_NAME (e2));
return TRUE;
}
GST_CAT_INFO (GST_CAT_PADS, "%s and %s not in same bin, making ghost pads",
GST_OBJECT_NAME (e1), GST_OBJECT_NAME (e2));
/* we need to setup some ghost pads */
root = find_common_root (e1, e2);
if (!root) {
g_warning ("Trying to connect elements that don't share a common "
"ancestor: %s and %s", GST_ELEMENT_NAME (e1), GST_ELEMENT_NAME (e2));
return FALSE;
}
while (GST_OBJECT_PARENT (e1) != root) {
*src = ghost_up ((GstElement *) e1, *src);
if (!*src)
goto cleanup_fail;
e1 = GST_OBJECT_PARENT (*src);
pads_created_local = g_slist_prepend (pads_created_local, *src);
}
while (GST_OBJECT_PARENT (e2) != root) {
*sink = ghost_up ((GstElement *) e2, *sink);
if (!*sink)
goto cleanup_fail;
e2 = GST_OBJECT_PARENT (*sink);
pads_created_local = g_slist_prepend (pads_created_local, *sink);
}
gst_object_unref (root);
*pads_created = g_slist_concat (*pads_created, pads_created_local);
return TRUE;
cleanup_fail:
gst_object_unref (root);
g_slist_foreach (pads_created_local, remove_pad, NULL);
g_slist_free (pads_created_local);
return FALSE;
}
static gboolean
pad_link_maybe_ghosting (GstPad * src, GstPad * sink)
{
GSList *pads_created = NULL;
gboolean ret;
if (!prepare_link_maybe_ghosting (&src, &sink, &pads_created)) {
ret = FALSE;
} else {
ret = (gst_pad_link (src, sink) == GST_PAD_LINK_OK);
}
if (!ret) {
g_slist_foreach (pads_created, remove_pad, NULL);
}
g_slist_free (pads_created);
return ret;
}
/**
* gst_element_link_pads:
* @src: a #GstElement containing the source pad.
* @srcpadname: the name of the #GstPad in source element or NULL for any pad.
* @dest: the #GstElement containing the destination pad.
* @destpadname: the name of the #GstPad in destination element,
* or NULL for any pad.
*
* Links the two named pads of the source and destination elements.
* Side effect is that if one of the pads has no parent, it becomes a
* child of the parent of the other element. If they have different
* parents, the link fails.
*
* Returns: TRUE if the pads could be linked, FALSE otherwise.
*/
gboolean
gst_element_link_pads (GstElement * src, const gchar * srcpadname,
GstElement * dest, const gchar * destpadname)
{
const GList *srcpads, *destpads, *srctempls, *desttempls, *l;
GstPad *srcpad, *destpad;
GstPadTemplate *srctempl, *desttempl;
GstElementClass *srcclass, *destclass;
/* checks */
g_return_val_if_fail (GST_IS_ELEMENT (src), FALSE);
g_return_val_if_fail (GST_IS_ELEMENT (dest), FALSE);
srcclass = GST_ELEMENT_GET_CLASS (src);
destclass = GST_ELEMENT_GET_CLASS (dest);
GST_CAT_INFO (GST_CAT_ELEMENT_PADS,
"trying to link element %s:%s to element %s:%s", GST_ELEMENT_NAME (src),
srcpadname ? srcpadname : "(any)", GST_ELEMENT_NAME (dest),
destpadname ? destpadname : "(any)");
/* get a src pad */
if (srcpadname) {
/* name specified, look it up */
if (!(srcpad = gst_element_get_static_pad (src, srcpadname)))
srcpad = gst_element_get_request_pad (src, srcpadname);
if (!srcpad) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "no pad %s:%s",
GST_ELEMENT_NAME (src), srcpadname);
return FALSE;
} else {
if (!(GST_PAD_DIRECTION (srcpad) == GST_PAD_SRC)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "pad %s:%s is no src pad",
GST_DEBUG_PAD_NAME (srcpad));
gst_object_unref (srcpad);
return FALSE;
}
if (GST_PAD_PEER (srcpad) != NULL) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "pad %s:%s is already linked",
GST_DEBUG_PAD_NAME (srcpad));
gst_object_unref (srcpad);
return FALSE;
}
}
srcpads = NULL;
} else {
/* no name given, get the first available pad */
GST_OBJECT_LOCK (src);
srcpads = GST_ELEMENT_PADS (src);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
srcpad = srcpads ? GST_PAD_CAST (srcpads->data) : NULL;
if (srcpad)
gst_object_ref (srcpad);
GST_OBJECT_UNLOCK (src);
}
/* get a destination pad */
if (destpadname) {
/* name specified, look it up */
if (!(destpad = gst_element_get_static_pad (dest, destpadname)))
destpad = gst_element_get_request_pad (dest, destpadname);
if (!destpad) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "no pad %s:%s",
GST_ELEMENT_NAME (dest), destpadname);
return FALSE;
} else {
if (!(GST_PAD_DIRECTION (destpad) == GST_PAD_SINK)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "pad %s:%s is no sink pad",
GST_DEBUG_PAD_NAME (destpad));
gst_object_unref (destpad);
return FALSE;
}
if (GST_PAD_PEER (destpad) != NULL) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "pad %s:%s is already linked",
GST_DEBUG_PAD_NAME (destpad));
gst_object_unref (destpad);
return FALSE;
}
}
destpads = NULL;
} else {
/* no name given, get the first available pad */
GST_OBJECT_LOCK (dest);
destpads = GST_ELEMENT_PADS (dest);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
destpad = destpads ? GST_PAD_CAST (destpads->data) : NULL;
if (destpad)
gst_object_ref (destpad);
GST_OBJECT_UNLOCK (dest);
}
if (srcpadname && destpadname) {
gboolean result;
/* two explicitly specified pads */
result = pad_link_maybe_ghosting (srcpad, destpad);
gst_object_unref (srcpad);
gst_object_unref (destpad);
return result;
}
if (srcpad) {
/* loop through the allowed pads in the source, trying to find a
* compatible destination pad */
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"looping through allowed src and dest pads");
do {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "trying src pad %s:%s",
GST_DEBUG_PAD_NAME (srcpad));
if ((GST_PAD_DIRECTION (srcpad) == GST_PAD_SRC) &&
(GST_PAD_PEER (srcpad) == NULL)) {
GstPad *temp;
if (destpadname) {
temp = destpad;
gst_object_ref (temp);
} else {
temp = gst_element_get_compatible_pad (dest, srcpad, NULL);
}
if (temp && pad_link_maybe_ghosting (srcpad, temp)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "linked pad %s:%s to pad %s:%s",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (temp));
if (destpad)
gst_object_unref (destpad);
gst_object_unref (srcpad);
gst_object_unref (temp);
return TRUE;
}
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
if (temp) {
gst_object_unref (temp);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
}
}
/* find a better way for this mess */
if (srcpads) {
srcpads = g_list_next (srcpads);
if (srcpads) {
gst_object_unref (srcpad);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
srcpad = GST_PAD_CAST (srcpads->data);
gst_object_ref (srcpad);
}
}
} while (srcpads);
}
if (srcpadname) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "no link possible from %s:%s to %s",
GST_DEBUG_PAD_NAME (srcpad), GST_ELEMENT_NAME (dest));
if (destpad)
gst_object_unref (destpad);
destpad = NULL;
}
if (srcpad)
gst_object_unref (srcpad);
srcpad = NULL;
if (destpad) {
/* loop through the existing pads in the destination */
do {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "trying dest pad %s:%s",
GST_DEBUG_PAD_NAME (destpad));
if ((GST_PAD_DIRECTION (destpad) == GST_PAD_SINK) &&
(GST_PAD_PEER (destpad) == NULL)) {
GstPad *temp = gst_element_get_compatible_pad (src, destpad, NULL);
if (temp && pad_link_maybe_ghosting (temp, destpad)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "linked pad %s:%s to pad %s:%s",
GST_DEBUG_PAD_NAME (temp), GST_DEBUG_PAD_NAME (destpad));
gst_object_unref (temp);
gst_object_unref (destpad);
return TRUE;
}
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
if (temp) {
gst_object_unref (temp);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
}
}
if (destpads) {
destpads = g_list_next (destpads);
if (destpads) {
gst_object_unref (destpad);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
destpad = GST_PAD_CAST (destpads->data);
gst_object_ref (destpad);
}
}
} while (destpads);
}
if (destpadname) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "no link possible from %s to %s:%s",
GST_ELEMENT_NAME (src), GST_DEBUG_PAD_NAME (destpad));
gst_object_unref (destpad);
return FALSE;
} else {
if (destpad)
gst_object_unref (destpad);
destpad = NULL;
}
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"we might have request pads on both sides, checking...");
srctempls = gst_element_class_get_pad_template_list (srcclass);
desttempls = gst_element_class_get_pad_template_list (destclass);
if (srctempls && desttempls) {
while (srctempls) {
srctempl = (GstPadTemplate *) srctempls->data;
if (srctempl->presence == GST_PAD_REQUEST) {
for (l = desttempls; l; l = l->next) {
desttempl = (GstPadTemplate *) l->data;
if (desttempl->presence == GST_PAD_REQUEST &&
desttempl->direction != srctempl->direction) {
if (gst_caps_is_always_compatible (gst_pad_template_get_caps
(srctempl), gst_pad_template_get_caps (desttempl))) {
srcpad =
gst_element_get_request_pad (src, srctempl->name_template);
destpad =
gst_element_get_request_pad (dest, desttempl->name_template);
if (srcpad && destpad
&& pad_link_maybe_ghosting (srcpad, destpad)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"linked pad %s:%s to pad %s:%s",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (destpad));
gst_object_unref (srcpad);
gst_object_unref (destpad);
return TRUE;
}
/* it failed, so we release the request pads */
if (srcpad)
gst_element_release_request_pad (src, srcpad);
if (destpad)
gst_element_release_request_pad (dest, destpad);
}
}
}
}
srctempls = srctempls->next;
}
}
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "no link possible from %s to %s",
GST_ELEMENT_NAME (src), GST_ELEMENT_NAME (dest));
return FALSE;
}
/**
* gst_element_link_pads_filtered:
* @src: a #GstElement containing the source pad.
* @srcpadname: the name of the #GstPad in source element or NULL for any pad.
* @dest: the #GstElement containing the destination pad.
* @destpadname: the name of the #GstPad in destination element or NULL for any pad.
* @filter: the #GstCaps to filter the link, or #NULL for no filter.
*
* Links the two named pads of the source and destination elements. Side effect
* is that if one of the pads has no parent, it becomes a child of the parent of
* the other element. If they have different parents, the link fails. If @caps
* is not #NULL, makes sure that the caps of the link is a subset of @caps.
*
* Returns: TRUE if the pads could be linked, FALSE otherwise.
*/
gboolean
gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
GstElement * dest, const gchar * destpadname, GstCaps * filter)
{
/* checks */
g_return_val_if_fail (GST_IS_ELEMENT (src), FALSE);
g_return_val_if_fail (GST_IS_ELEMENT (dest), FALSE);
g_return_val_if_fail (filter == NULL || GST_IS_CAPS (filter), FALSE);
if (filter) {
GstElement *capsfilter;
GstObject *parent;
GstState state, pending;
capsfilter = gst_element_factory_make ("capsfilter", NULL);
if (!capsfilter) {
GST_ERROR ("Could not make a capsfilter");
return FALSE;
}
parent = gst_object_get_parent (GST_OBJECT (src));
g_return_val_if_fail (GST_IS_BIN (parent), FALSE);
gst_element_get_state (GST_ELEMENT_CAST (parent), &state, &pending, 0);
if (!gst_bin_add (GST_BIN (parent), capsfilter)) {
GST_ERROR ("Could not add capsfilter");
gst_object_unref (capsfilter);
gst_object_unref (parent);
return FALSE;
}
if (pending != GST_STATE_VOID_PENDING)
state = pending;
gst_element_set_state (capsfilter, state);
gst_object_unref (parent);
g_object_set (capsfilter, "caps", filter, NULL);
if (gst_element_link_pads (src, srcpadname, capsfilter, "sink")
&& gst_element_link_pads (capsfilter, "src", dest, destpadname)) {
return TRUE;
} else {
GST_INFO ("Could not link elements");
gst_element_set_state (capsfilter, GST_STATE_NULL);
/* this will unlink and unref as appropriate */
gst_bin_remove (GST_BIN (GST_OBJECT_PARENT (capsfilter)), capsfilter);
return FALSE;
}
} else {
return gst_element_link_pads (src, srcpadname, dest, destpadname);
}
}
/**
* gst_element_link:
* @src: a #GstElement containing the source pad.
* @dest: the #GstElement containing the destination pad.
*
* Links @src to @dest. The link must be from source to
* destination; the other direction will not be tried. The function looks for
* existing pads that aren't linked yet. It will request new pads if necessary.
* Such pads need to be released manualy when unlinking.
* If multiple links are possible, only one is established.
*
* Make sure you have added your elements to a bin or pipeline with
* gst_bin_add() before trying to link them.
*
* Returns: TRUE if the elements could be linked, FALSE otherwise.
*/
gboolean
gst_element_link (GstElement * src, GstElement * dest)
{
return gst_element_link_pads_filtered (src, NULL, dest, NULL, NULL);
}
/**
* gst_element_link_many:
* @element_1: the first #GstElement in the link chain.
* @element_2: the second #GstElement in the link chain.
* @...: the NULL-terminated list of elements to link in order.
*
* Chain together a series of elements. Uses gst_element_link().
* Make sure you have added your elements to a bin or pipeline with
* gst_bin_add() before trying to link them.
*
* Returns: TRUE on success, FALSE otherwise.
*/
gboolean
gst_element_link_many (GstElement * element_1, GstElement * element_2, ...)
{
gboolean res = TRUE;
va_list args;
g_return_val_if_fail (GST_IS_ELEMENT (element_1), FALSE);
g_return_val_if_fail (GST_IS_ELEMENT (element_2), FALSE);
va_start (args, element_2);
while (element_2) {
if (!gst_element_link (element_1, element_2)) {
res = FALSE;
break;
}
element_1 = element_2;
element_2 = va_arg (args, GstElement *);
}
va_end (args);
return res;
}
/**
* gst_element_link_filtered:
* @src: a #GstElement containing the source pad.
* @dest: the #GstElement containing the destination pad.
* @filter: the #GstCaps to filter the link, or #NULL for no filter.
*
* Links @src to @dest using the given caps as filtercaps.
* The link must be from source to
* destination; the other direction will not be tried. The function looks for
* existing pads that aren't linked yet. It will request new pads if necessary.
* If multiple links are possible, only one is established.
*
* Make sure you have added your elements to a bin or pipeline with
* gst_bin_add() before trying to link them.
*
* Returns: TRUE if the pads could be linked, FALSE otherwise.
*/
gboolean
gst_element_link_filtered (GstElement * src, GstElement * dest,
GstCaps * filter)
{
return gst_element_link_pads_filtered (src, NULL, dest, NULL, filter);
}
/**
* gst_element_unlink_pads:
* @src: a #GstElement containing the source pad.
* @srcpadname: the name of the #GstPad in source element.
* @dest: a #GstElement containing the destination pad.
* @destpadname: the name of the #GstPad in destination element.
*
* Unlinks the two named pads of the source and destination elements.
*/
void
gst_element_unlink_pads (GstElement * src, const gchar * srcpadname,
GstElement * dest, const gchar * destpadname)
{
GstPad *srcpad, *destpad;
gboolean srcrequest, destrequest;
srcrequest = destrequest = FALSE;
g_return_if_fail (src != NULL);
g_return_if_fail (GST_IS_ELEMENT (src));
g_return_if_fail (srcpadname != NULL);
g_return_if_fail (dest != NULL);
g_return_if_fail (GST_IS_ELEMENT (dest));
g_return_if_fail (destpadname != NULL);
/* obtain the pads requested */
if (!(srcpad = gst_element_get_static_pad (src, srcpadname)))
if ((srcpad = gst_element_get_request_pad (src, srcpadname)))
srcrequest = TRUE;
if (srcpad == NULL) {
GST_WARNING_OBJECT (src, "source element has no pad \"%s\"", srcpadname);
return;
}
if (!(destpad = gst_element_get_static_pad (dest, destpadname)))
if ((destpad = gst_element_get_request_pad (dest, destpadname)))
destrequest = TRUE;
if (destpad == NULL) {
GST_WARNING_OBJECT (dest, "destination element has no pad \"%s\"",
destpadname);
goto free_src;
}
/* we're satisified they can be unlinked, let's do it */
gst_pad_unlink (srcpad, destpad);
if (destrequest)
gst_element_release_request_pad (dest, destpad);
gst_object_unref (destpad);
free_src:
if (srcrequest)
gst_element_release_request_pad (src, srcpad);
gst_object_unref (srcpad);
}
/**
* gst_element_unlink_many:
* @element_1: the first #GstElement in the link chain.
* @element_2: the second #GstElement in the link chain.
* @...: the NULL-terminated list of elements to unlink in order.
*
* Unlinks a series of elements. Uses gst_element_unlink().
*/
void
gst_element_unlink_many (GstElement * element_1, GstElement * element_2, ...)
{
va_list args;
g_return_if_fail (element_1 != NULL && element_2 != NULL);
g_return_if_fail (GST_IS_ELEMENT (element_1) && GST_IS_ELEMENT (element_2));
va_start (args, element_2);
while (element_2) {
gst_element_unlink (element_1, element_2);
element_1 = element_2;
element_2 = va_arg (args, GstElement *);
}
va_end (args);
}
/**
* gst_element_unlink:
* @src: the source #GstElement to unlink.
* @dest: the sink #GstElement to unlink.
*
* Unlinks all source pads of the source element with all sink pads
* of the sink element to which they are linked.
*
* If the link has been made using gst_element_link(), it could have created an
* requestpad, which has to be released using gst_element_release_request_pad().
*/
void
gst_element_unlink (GstElement * src, GstElement * dest)
{
GstIterator *pads;
gboolean done = FALSE;
g_return_if_fail (GST_IS_ELEMENT (src));
g_return_if_fail (GST_IS_ELEMENT (dest));
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "unlinking \"%s\" and \"%s\"",
GST_ELEMENT_NAME (src), GST_ELEMENT_NAME (dest));
pads = gst_element_iterate_pads (src);
while (!done) {
gpointer data;
switch (gst_iterator_next (pads, &data)) {
case GST_ITERATOR_OK:
{
GstPad *pad = GST_PAD_CAST (data);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
if (GST_PAD_IS_SRC (pad)) {
GstPad *peerpad = gst_pad_get_peer (pad);
/* see if the pad is linked and is really a pad of dest */
if (peerpad) {
GstElement *peerelem;
peerelem = gst_pad_get_parent_element (peerpad);
if (peerelem == dest) {
gst_pad_unlink (pad, peerpad);
}
if (peerelem)
gst_object_unref (peerelem);
gst_object_unref (peerpad);
}
}
gst_object_unref (pad);
break;
}
case GST_ITERATOR_RESYNC:
gst_iterator_resync (pads);
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
default:
g_assert_not_reached ();
break;
}
}
gst_iterator_free (pads);
}
/**
* gst_element_query_position:
* @element: a #GstElement to invoke the position query on.
* @format: a pointer to the #GstFormat asked for.
* On return contains the #GstFormat used.
* @cur: A location in which to store the current position, or NULL.
*
* Queries an element for the stream position.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_element_query_position (GstElement * element, GstFormat * format,
gint64 * cur)
{
GstQuery *query;
gboolean ret;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (format != NULL, FALSE);
query = gst_query_new_position (*format);
ret = gst_element_query (element, query);
if (ret)
gst_query_parse_position (query, format, cur);
gst_query_unref (query);
return ret;
}
/**
* gst_element_query_duration:
* @element: a #GstElement to invoke the duration query on.
* @format: a pointer to the #GstFormat asked for.
* On return contains the #GstFormat used.
* @duration: A location in which to store the total duration, or NULL.
*
* Queries an element for the total stream duration.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_element_query_duration (GstElement * element, GstFormat * format,
gint64 * duration)
{
GstQuery *query;
gboolean ret;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (format != NULL, FALSE);
query = gst_query_new_duration (*format);
ret = gst_element_query (element, query);
if (ret)
gst_query_parse_duration (query, format, duration);
gst_query_unref (query);
return ret;
}
/**
* gst_element_query_convert:
* @element: a #GstElement to invoke the convert query on.
* @src_format: a #GstFormat to convert from.
* @src_val: a value to convert.
* @dest_format: a pointer to the #GstFormat to convert to.
* @dest_val: a pointer to the result.
*
* Queries an element to convert @src_val in @src_format to @dest_format.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_element_query_convert (GstElement * element, GstFormat src_format,
gint64 src_val, GstFormat * dest_format, gint64 * dest_val)
{
GstQuery *query;
gboolean ret;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (dest_format != NULL, FALSE);
g_return_val_if_fail (dest_val != NULL, FALSE);
if (*dest_format == src_format) {
*dest_val = src_val;
return TRUE;
}
query = gst_query_new_convert (src_format, src_val, *dest_format);
ret = gst_element_query (element, query);
if (ret)
gst_query_parse_convert (query, NULL, NULL, dest_format, dest_val);
gst_query_unref (query);
return ret;
}
/**
* gst_element_seek_simple
* @element: a #GstElement to seek on
* @format: a #GstFormat to execute the seek in, such as #GST_FORMAT_TIME
* @seek_flags: seek options; playback applications will usually want to use
* GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT here
* @seek_pos: position to seek to (relative to the start); if you are doing
* a seek in #GST_FORMAT_TIME this value is in nanoseconds -
* multiply with #GST_SECOND to convert seconds to nanoseconds or
* with #GST_MSECOND to convert milliseconds to nanoseconds.
*
* Simple API to perform a seek on the given element, meaning it just seeks
* to the given position relative to the start of the stream. For more complex
* operations like segment seeks (e.g. for looping) or changing the playback
* rate or seeking relative to the last configured playback segment you should
* use gst_element_seek().
*
* In a completely prerolled PAUSED or PLAYING pipeline, seeking is always
* guaranteed to return %TRUE on a seekable media type or %FALSE when the media
* type is certainly not seekable (such as a live stream).
*
* Some elements allow for seeking in the READY state, in this
* case they will store the seek event and execute it when they are put to
* PAUSED. If the element supports seek in READY, it will always return %TRUE when
* it receives the event in the READY state.
*
* Returns: %TRUE if the seek operation succeeded (the seek might not always be
* executed instantly though)
*
* Since: 0.10.7
*/
gboolean
gst_element_seek_simple (GstElement * element, GstFormat format,
GstSeekFlags seek_flags, gint64 seek_pos)
{
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (seek_pos >= 0, FALSE);
return gst_element_seek (element, 1.0, format, seek_flags,
GST_SEEK_TYPE_SET, seek_pos, GST_SEEK_TYPE_NONE, 0);
}
/**
* gst_pad_use_fixed_caps:
* @pad: the pad to use
*
* A helper function you can use that sets the
* @gst_pad_get_fixed_caps_func as the getcaps function for the
* pad. This way the function will always return the negotiated caps
* or in case the pad is not negotiated, the padtemplate caps.
*
* Use this function on a pad that, once _set_caps() has been called
* on it, cannot be renegotiated to something else.
*/
void
gst_pad_use_fixed_caps (GstPad * pad)
{
gst_pad_set_getcaps_function (pad, gst_pad_get_fixed_caps_func);
}
/**
* gst_pad_get_fixed_caps_func:
* @pad: the pad to use
*
* A helper function you can use as a GetCaps function that
* will return the currently negotiated caps or the padtemplate
* when NULL.
*
* Returns: The currently negotiated caps or the padtemplate.
*/
GstCaps *
gst_pad_get_fixed_caps_func (GstPad * pad)
{
GstCaps *result;
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
GST_OBJECT_LOCK (pad);
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
if (GST_PAD_CAPS (pad)) {
result = GST_PAD_CAPS (pad);
GST_CAT_DEBUG (GST_CAT_CAPS,
"using pad caps %p %" GST_PTR_FORMAT, result, result);
result = gst_caps_ref (result);
} else if (GST_PAD_PAD_TEMPLATE (pad)) {
gst/gstutils.c: RPAD fixes all around. Original commit message from CVS: 2005-06-08 Andy Wingo <wingo@pobox.com> * gst/gstutils.c: RPAD fixes all around. (gst_element_link_pads): Refcounting fixes. * tools/gst-inspect.c: * tools/gst-xmlinspect.c: * parse/grammar.y: * gst/base/gsttypefindhelper.c: * gst/base/gstbasesink.c: * gst/gstqueue.c: RPAD fixes. * gst/gstghostpad.h: * gst/gstghostpad.c: New ghost pad implementation as full proxy pads. The tricky thing is they provide both source and sink interfaces, since they proxy the internal pad for the external pad, and vice versa. Implement with lower-level ProxyPad objects, with the interior proxy pad as a child of the exterior ghost pad. Should write a doc on this. * gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/. (gst_pad_set_name, gst_pad_set_parent): Macros removed, use gst_object API. * gst/gstpad.c: Big changes. No more stub base GstPad, now all pads are real pads. No ghost pads in this file. Not documenting the myriad s/RPAD/PAD/ and REALIZE fixes. (gst_pad_class_init): Add properties for "direction" and "template". Both are construct-only, so they can't change during the life of the pad. Fixes properly deriving from GstPad. (gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For derived objects, just set properties when creating the objects via g_object_new. (gst_pad_get_parent): Implement as a function, return NULL if the parent is not an element. (gst_pad_get_real_parent, gst_pad_add_ghost_pad) (gst_pad_remove_ghost_pad, gst_pad_realize): Removed. * gst/gstobject.c (gst_object_class_init): Make name a construct property. Don't set it in the object init. * gst/gstelement.c (gst_element_add_pad): Don't allow adding pads with UNKNOWN direction. (gst_element_add_ghost_pad): Remove non-orthogonal API. Replace with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)). (gst_element_remove_pad): Remove ghost-pad special cases. (gst_element_pads_activate): Remove rpad cruft. * gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to catch the pad's-parent-not-an-element case. * gst/gst.h: Include gstghostpad.h. * gst/gst.c (init_post): No more real, ghost pads. * gst/Makefile.am: Add gstghostpad.[ch]. * check/Makefile.am: * check/gst/gstbin.c: * check/gst/gstghostpad.c (test_ghost_pads): Check that linking into a bin creates ghost pads, and that the refcounts are right. Partly moved from gstbin.c.
2005-06-08 22:16:27 +00:00
GstPadTemplate *templ = GST_PAD_PAD_TEMPLATE (pad);
result = GST_PAD_TEMPLATE_CAPS (templ);
GST_CAT_DEBUG (GST_CAT_CAPS,
"using pad template %p with caps %p %" GST_PTR_FORMAT, templ, result,
result);
result = gst_caps_ref (result);
} else {
GST_CAT_DEBUG (GST_CAT_CAPS, "pad has no caps");
result = gst_caps_new_empty ();
}
GST_OBJECT_UNLOCK (pad);
return result;
}
/**
* gst_pad_get_parent_element:
* @pad: a pad
*
* Gets the parent of @pad, cast to a #GstElement. If a @pad has no parent or
* its parent is not an element, return NULL.
*
* Returns: The parent of the pad. The caller has a reference on the parent, so
* unref when you're finished with it.
*
* MT safe.
*/
GstElement *
gst_pad_get_parent_element (GstPad * pad)
{
GstObject *p;
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
p = gst_object_get_parent (GST_OBJECT_CAST (pad));
if (p && !GST_IS_ELEMENT (p)) {
gst_object_unref (p);
p = NULL;
}
return GST_ELEMENT_CAST (p);
}
/**
* gst_object_default_error:
* @source: the #GstObject that initiated the error.
* @error: the GError.
* @debug: an additional debug information string, or NULL.
*
* A default error function.
*
* The default handler will simply print the error string using g_print.
*/
void
gst_object_default_error (GstObject * source, GError * error, gchar * debug)
{
gchar *name = gst_object_get_path_string (source);
g_print (_("ERROR: from element %s: %s\n"), name, error->message);
if (debug)
g_print (_("Additional debug info:\n%s\n"), debug);
g_free (name);
}
/**
* gst_bin_add_many:
* @bin: a #GstBin
* @element_1: the #GstElement element to add to the bin
* @...: additional elements to add to the bin
*
* Adds a NULL-terminated list of elements to a bin. This function is
* equivalent to calling gst_bin_add() for each member of the list. The return
* value of each gst_bin_add() is ignored.
*/
void
gst_bin_add_many (GstBin * bin, GstElement * element_1, ...)
{
va_list args;
g_return_if_fail (GST_IS_BIN (bin));
g_return_if_fail (GST_IS_ELEMENT (element_1));
va_start (args, element_1);
while (element_1) {
gst_bin_add (bin, element_1);
element_1 = va_arg (args, GstElement *);
}
va_end (args);
}
/**
* gst_bin_remove_many:
* @bin: a #GstBin
* @element_1: the first #GstElement to remove from the bin
* @...: NULL-terminated list of elements to remove from the bin
*
* Remove a list of elements from a bin. This function is equivalent
* to calling gst_bin_remove() with each member of the list.
*/
void
gst_bin_remove_many (GstBin * bin, GstElement * element_1, ...)
{
va_list args;
g_return_if_fail (GST_IS_BIN (bin));
g_return_if_fail (GST_IS_ELEMENT (element_1));
va_start (args, element_1);
while (element_1) {
gst_bin_remove (bin, element_1);
element_1 = va_arg (args, GstElement *);
}
va_end (args);
}
static void
gst_element_populate_std_props (GObjectClass * klass, const gchar * prop_name,
guint arg_id, GParamFlags flags)
{
GQuark prop_id = g_quark_from_string (prop_name);
GParamSpec *pspec;
static GQuark fd_id = 0;
static GQuark blocksize_id;
static GQuark bytesperread_id;
static GQuark dump_id;
static GQuark filesize_id;
static GQuark mmapsize_id;
static GQuark location_id;
static GQuark offset_id;
static GQuark silent_id;
static GQuark touch_id;
if (!fd_id) {
fd_id = g_quark_from_static_string ("fd");
blocksize_id = g_quark_from_static_string ("blocksize");
bytesperread_id = g_quark_from_static_string ("bytesperread");
dump_id = g_quark_from_static_string ("dump");
filesize_id = g_quark_from_static_string ("filesize");
mmapsize_id = g_quark_from_static_string ("mmapsize");
location_id = g_quark_from_static_string ("location");
offset_id = g_quark_from_static_string ("offset");
silent_id = g_quark_from_static_string ("silent");
touch_id = g_quark_from_static_string ("touch");
}
if (prop_id == fd_id) {
pspec = g_param_spec_int ("fd", "File-descriptor",
"File-descriptor for the file being read", 0, G_MAXINT, 0, flags);
} else if (prop_id == blocksize_id) {
pspec = g_param_spec_ulong ("blocksize", "Block Size",
"Block size to read per buffer", 0, G_MAXULONG, 4096, flags);
} else if (prop_id == bytesperread_id) {
pspec = g_param_spec_int ("bytesperread", "Bytes per read",
"Number of bytes to read per buffer", G_MININT, G_MAXINT, 0, flags);
} else if (prop_id == dump_id) {
pspec = g_param_spec_boolean ("dump", "Dump",
"Dump bytes to stdout", FALSE, flags);
} else if (prop_id == filesize_id) {
pspec = g_param_spec_int64 ("filesize", "File Size",
"Size of the file being read", 0, G_MAXINT64, 0, flags);
} else if (prop_id == mmapsize_id) {
pspec = g_param_spec_ulong ("mmapsize", "mmap() Block Size",
"Size in bytes of mmap()d regions", 0, G_MAXULONG, 4 * 1048576, flags);
} else if (prop_id == location_id) {
pspec = g_param_spec_string ("location", "File Location",
"Location of the file to read", NULL, flags);
} else if (prop_id == offset_id) {
pspec = g_param_spec_int64 ("offset", "File Offset",
"Byte offset of current read pointer", 0, G_MAXINT64, 0, flags);
} else if (prop_id == silent_id) {
pspec = g_param_spec_boolean ("silent", "Silent", "Don't produce events",
FALSE, flags);
} else if (prop_id == touch_id) {
pspec = g_param_spec_boolean ("touch", "Touch read data",
"Touch data to force disk read before " "push ()", TRUE, flags);
} else {
g_warning ("Unknown - 'standard' property '%s' id %d from klass %s",
prop_name, arg_id, g_type_name (G_OBJECT_CLASS_TYPE (klass)));
pspec = NULL;
}
if (pspec) {
g_object_class_install_property (klass, arg_id, pspec);
}
}
/**
* gst_element_class_install_std_props:
* @klass: the #GstElementClass to add the properties to.
* @first_name: the name of the first property.
* in a NULL terminated
* @...: the id and flags of the first property, followed by
* further 'name', 'id', 'flags' triplets and terminated by NULL.
*
* Adds a list of standardized properties with types to the @klass.
* the id is for the property switch in your get_prop method, and
* the flags determine readability / writeability.
**/
void
gst_element_class_install_std_props (GstElementClass * klass,
const gchar * first_name, ...)
{
const char *name;
va_list args;
g_return_if_fail (GST_IS_ELEMENT_CLASS (klass));
va_start (args, first_name);
name = first_name;
while (name) {
int arg_id = va_arg (args, int);
int flags = va_arg (args, int);
gst_element_populate_std_props ((GObjectClass *) klass, name, arg_id,
flags);
name = va_arg (args, char *);
}
va_end (args);
}
/**
* gst_buffer_merge:
* @buf1: the first source #GstBuffer to merge.
* @buf2: the second source #GstBuffer to merge.
*
* Create a new buffer that is the concatenation of the two source
* buffers. The original source buffers will not be modified or
* unref'd. Make sure you unref the source buffers if they are not used
* anymore afterwards.
*
* If the buffers point to contiguous areas of memory, the buffer
* is created without copying the data.
*
* Returns: the new #GstBuffer which is the concatenation of the source buffers.
*/
GstBuffer *
gst_buffer_merge (GstBuffer * buf1, GstBuffer * buf2)
{
GstBuffer *result;
/* we're just a specific case of the more general gst_buffer_span() */
result = gst_buffer_span (buf1, 0, buf2, buf1->size + buf2->size);
return result;
}
/**
* gst_buffer_join:
* @buf1: the first source #GstBuffer.
* @buf2: the second source #GstBuffer.
*
* Create a new buffer that is the concatenation of the two source
* buffers, and unrefs the original source buffers.
*
* If the buffers point to contiguous areas of memory, the buffer
* is created without copying the data.
*
* This is a convenience function for C programmers. See also
* gst_buffer_merge(), which does the same thing without
* unreffing the input parameters. Language bindings without
* explicit reference counting should not wrap this function.
*
* Returns: the new #GstBuffer which is the concatenation of the source buffers.
*/
GstBuffer *
gst_buffer_join (GstBuffer * buf1, GstBuffer * buf2)
{
GstBuffer *result;
result = gst_buffer_span (buf1, 0, buf2, buf1->size + buf2->size);
gst_buffer_unref (buf1);
gst_buffer_unref (buf2);
return result;
}
/**
* gst_buffer_stamp:
* @dest: buffer to stamp
* @src: buffer to stamp from
*
* Copies additional information (the timestamp, duration, and offset start
* and end) from one buffer to the other.
*
* This function does not copy any buffer flags or caps and is equivalent to
* gst_buffer_copy_metadata(@dest, @src, GST_BUFFER_COPY_TIMESTAMPS).
*
* Deprecated: use gst_buffer_copy_metadata() instead, it provides more
* control.
*/
#ifndef GST_REMOVE_DEPRECATED
void
gst_buffer_stamp (GstBuffer * dest, const GstBuffer * src)
{
gst_buffer_copy_metadata (dest, src, GST_BUFFER_COPY_TIMESTAMPS);
}
#endif /* GST_REMOVE_DEPRECATED */
static gboolean
intersect_caps_func (GstPad * pad, GValue * ret, GstPad * orig)
{
/* skip the pad, the request came from */
if (pad != orig) {
GstCaps *peercaps, *existing;
existing = g_value_get_pointer (ret);
peercaps = gst_pad_peer_get_caps (pad);
if (peercaps == NULL)
peercaps = gst_caps_new_any ();
g_value_set_pointer (ret, gst_caps_intersect (existing, peercaps));
gst_caps_unref (existing);
gst_caps_unref (peercaps);
}
gst_object_unref (pad);
return TRUE;
}
/**
* gst_pad_proxy_getcaps:
* @pad: a #GstPad to proxy.
*
* Calls gst_pad_get_allowed_caps() for every other pad belonging to the
* same element as @pad, and returns the intersection of the results.
*
* This function is useful as a default getcaps function for an element
* that can handle any stream format, but requires all its pads to have
* the same caps. Two such elements are tee and aggregator.
*
* Returns: the intersection of the other pads' allowed caps.
*/
GstCaps *
gst_pad_proxy_getcaps (GstPad * pad)
{
GstElement *element;
GstCaps *caps, *intersected;
GstIterator *iter;
GstIteratorResult res;
GValue ret = { 0, };
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
GST_CAT_DEBUG (GST_CAT_PADS, "proxying getcaps for %s:%s",
GST_DEBUG_PAD_NAME (pad));
element = gst_pad_get_parent_element (pad);
if (element == NULL)
return NULL;
/* value to hold the return, by default it holds ANY, the ref is taken by
* the GValue. */
g_value_init (&ret, G_TYPE_POINTER);
g_value_set_pointer (&ret, gst_caps_new_any ());
iter = gst_element_iterate_pads (element);
while (1) {
res =
gst_iterator_fold (iter, (GstIteratorFoldFunction) intersect_caps_func,
&ret, pad);
switch (res) {
case GST_ITERATOR_RESYNC:
/* unref any value stored */
if ((caps = g_value_get_pointer (&ret)))
gst_caps_unref (caps);
/* need to reset the result again to ANY */
g_value_set_pointer (&ret, gst_caps_new_any ());
gst_iterator_resync (iter);
break;
case GST_ITERATOR_DONE:
/* all pads iterated, return collected value */
goto done;
default:
/* iterator returned _ERROR or premature end with _OK,
* mark an error and exit */
if ((caps = g_value_get_pointer (&ret)))
gst_caps_unref (caps);
g_value_set_pointer (&ret, NULL);
goto error;
}
}
done:
gst_iterator_free (iter);
gst_object_unref (element);
caps = g_value_get_pointer (&ret);
g_value_unset (&ret);
intersected = gst_caps_intersect (caps, gst_pad_get_pad_template_caps (pad));
gst_caps_unref (caps);
return intersected;
/* ERRORS */
error:
{
g_warning ("Pad list returned error on element %s",
GST_ELEMENT_NAME (element));
gst_iterator_free (iter);
gst_object_unref (element);
return NULL;
}
}
typedef struct
{
GstPad *orig;
GstCaps *caps;
} LinkData;
static gboolean
link_fold_func (GstPad * pad, GValue * ret, LinkData * data)
{
gboolean success = TRUE;
if (pad != data->orig) {
success = gst_pad_set_caps (pad, data->caps);
g_value_set_boolean (ret, success);
}
gst_object_unref (pad);
return success;
}
/**
* gst_pad_proxy_setcaps
* @pad: a #GstPad to proxy from
* @caps: the #GstCaps to link with
*
* Calls gst_pad_set_caps() for every other pad belonging to the
* same element as @pad. If gst_pad_set_caps() fails on any pad,
* the proxy setcaps fails. May be used only during negotiation.
*
* Returns: TRUE if sucessful
*/
gboolean
gst_pad_proxy_setcaps (GstPad * pad, GstCaps * caps)
{
GstElement *element;
GstIterator *iter;
GstIteratorResult res;
GValue ret = { 0, };
LinkData data;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (caps != NULL, FALSE);
GST_CAT_DEBUG (GST_CAT_PADS, "proxying pad link for %s:%s",
GST_DEBUG_PAD_NAME (pad));
element = gst_pad_get_parent_element (pad);
if (element == NULL)
return FALSE;
iter = gst_element_iterate_pads (element);
g_value_init (&ret, G_TYPE_BOOLEAN);
g_value_set_boolean (&ret, TRUE);
data.orig = pad;
data.caps = caps;
res = gst_iterator_fold (iter, (GstIteratorFoldFunction) link_fold_func,
&ret, &data);
gst_iterator_free (iter);
if (res != GST_ITERATOR_DONE)
goto pads_changed;
gst_object_unref (element);
/* ok not to unset the gvalue */
return g_value_get_boolean (&ret);
/* ERRORS */
pads_changed:
{
g_warning ("Pad list changed during proxy_pad_link for element %s",
GST_ELEMENT_NAME (element));
gst_object_unref (element);
return FALSE;
}
}
/**
* gst_pad_query_position:
* @pad: a #GstPad to invoke the position query on.
* @format: a pointer to the #GstFormat asked for.
* On return contains the #GstFormat used.
* @cur: A location in which to store the current position, or NULL.
*
* Queries a pad for the stream position.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query_position (GstPad * pad, GstFormat * format, gint64 * cur)
{
GstQuery *query;
gboolean ret;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (format != NULL, FALSE);
query = gst_query_new_position (*format);
ret = gst_pad_query (pad, query);
if (ret)
gst_query_parse_position (query, format, cur);
gst_query_unref (query);
return ret;
}
/**
* gst_pad_query_peer_position:
* @pad: a #GstPad on whose peer to invoke the position query on.
* Must be a sink pad.
* @format: a pointer to the #GstFormat asked for.
* On return contains the #GstFormat used.
* @cur: A location in which to store the current position, or NULL.
*
* Queries the peer of a given sink pad for the stream position.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query_peer_position (GstPad * pad, GstFormat * format, gint64 * cur)
{
gboolean ret = FALSE;
GstPad *peer;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_PAD_IS_SINK (pad), FALSE);
g_return_val_if_fail (format != NULL, FALSE);
peer = gst_pad_get_peer (pad);
if (peer) {
ret = gst_pad_query_position (peer, format, cur);
gst_object_unref (peer);
}
return ret;
}
/**
* gst_pad_query_duration:
* @pad: a #GstPad to invoke the duration query on.
* @format: a pointer to the #GstFormat asked for.
* On return contains the #GstFormat used.
* @duration: A location in which to store the total duration, or NULL.
*
* Queries a pad for the total stream duration.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query_duration (GstPad * pad, GstFormat * format, gint64 * duration)
{
GstQuery *query;
gboolean ret;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (format != NULL, FALSE);
query = gst_query_new_duration (*format);
ret = gst_pad_query (pad, query);
if (ret)
gst_query_parse_duration (query, format, duration);
gst_query_unref (query);
return ret;
}
/**
* gst_pad_query_peer_duration:
* @pad: a #GstPad on whose peer pad to invoke the duration query on.
* Must be a sink pad.
* @format: a pointer to the #GstFormat asked for.
* On return contains the #GstFormat used.
* @duration: A location in which to store the total duration, or NULL.
*
* Queries the peer pad of a given sink pad for the total stream duration.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query_peer_duration (GstPad * pad, GstFormat * format,
gint64 * duration)
{
gboolean ret = FALSE;
GstPad *peer;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_PAD_IS_SINK (pad), FALSE);
g_return_val_if_fail (format != NULL, FALSE);
peer = gst_pad_get_peer (pad);
if (peer) {
ret = gst_pad_query_duration (peer, format, duration);
gst_object_unref (peer);
}
return ret;
}
/**
* gst_pad_query_convert:
* @pad: a #GstPad to invoke the convert query on.
* @src_format: a #GstFormat to convert from.
* @src_val: a value to convert.
* @dest_format: a pointer to the #GstFormat to convert to.
* @dest_val: a pointer to the result.
*
* Queries a pad to convert @src_val in @src_format to @dest_format.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query_convert (GstPad * pad, GstFormat src_format, gint64 src_val,
GstFormat * dest_format, gint64 * dest_val)
{
GstQuery *query;
gboolean ret;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (dest_format != NULL, FALSE);
g_return_val_if_fail (dest_val != NULL, FALSE);
if (*dest_format == src_format) {
*dest_val = src_val;
return TRUE;
}
query = gst_query_new_convert (src_format, src_val, *dest_format);
ret = gst_pad_query (pad, query);
if (ret)
gst_query_parse_convert (query, NULL, NULL, dest_format, dest_val);
gst_query_unref (query);
return ret;
}
/**
* gst_pad_query_peer_convert:
* @pad: a #GstPad, on whose peer pad to invoke the convert query on.
* Must be a sink pad.
* @src_format: a #GstFormat to convert from.
* @src_val: a value to convert.
* @dest_format: a pointer to the #GstFormat to convert to.
* @dest_val: a pointer to the result.
*
* Queries the peer pad of a given sink pad to convert @src_val in @src_format
* to @dest_format.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query_peer_convert (GstPad * pad, GstFormat src_format, gint64 src_val,
GstFormat * dest_format, gint64 * dest_val)
{
gboolean ret = FALSE;
GstPad *peer;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_PAD_IS_SINK (pad), FALSE);
g_return_val_if_fail (src_val >= 0, FALSE);
g_return_val_if_fail (dest_format != NULL, FALSE);
g_return_val_if_fail (dest_val != NULL, FALSE);
peer = gst_pad_get_peer (pad);
if (peer) {
ret = gst_pad_query_convert (peer, src_format, src_val, dest_format,
dest_val);
gst_object_unref (peer);
}
return ret;
}
/**
* gst_atomic_int_set:
* @atomic_int: pointer to an atomic integer
* @value: value to set
*
* Unconditionally sets the atomic integer to @value.
*
* Deprecated: Use g_atomic_int_set().
*
*/
#ifndef GST_REMOVE_DEPRECATED
void
gst_atomic_int_set (gint * atomic_int, gint value)
{
g_atomic_int_set (atomic_int, value);
}
#endif
/**
* gst_pad_add_data_probe:
* @pad: pad to add the data probe handler to
* @handler: function to call when data is passed over pad
* @data: data to pass along with the handler
*
* Adds a "data probe" to a pad. This function will be called whenever data
* passes through a pad. In this case data means both events and buffers. The
* probe will be called with the data as an argument, meaning @handler should
* have the same callback signature as the #GstPad::have-data signal.
* Note that the data will have a reference count greater than 1, so it will
* be immutable -- you must not change it.
*
* For source pads, the probe will be called after the blocking function, if any
* (see gst_pad_set_blocked_async()), but before looking up the peer to chain
* to. For sink pads, the probe function will be called before configuring the
* sink with new caps, if any, and before calling the pad's chain function.
*
* Your data probe should return TRUE to let the data continue to flow, or FALSE
* to drop it. Dropping data is rarely useful, but occasionally comes in handy
* with events.
*
* Although probes are implemented internally by connecting @handler to the
* have-data signal on the pad, if you want to remove a probe it is insufficient
* to only call g_signal_handler_disconnect on the returned handler id. To
* remove a probe, use the appropriate function, such as
* gst_pad_remove_data_probe().
*
* Returns: The handler id.
*/
gulong
gst_pad_add_data_probe (GstPad * pad, GCallback handler, gpointer data)
{
return gst_pad_add_data_probe_full (pad, handler, data, NULL);
}
/**
* gst_pad_add_data_probe_full:
* @pad: pad to add the data probe handler to
* @handler: function to call when data is passed over pad
* @data: data to pass along with the handler
* @notify: function to call when the probe is disconnected, or NULL
*
* Adds a "data probe" to a pad. This function will be called whenever data
* passes through a pad. In this case data means both events and buffers. The
* probe will be called with the data as an argument, meaning @handler should
* have the same callback signature as the #GstPad::have-data signal.
* Note that the data will have a reference count greater than 1, so it will
* be immutable -- you must not change it.
*
* For source pads, the probe will be called after the blocking function, if any
* (see gst_pad_set_blocked_async()), but before looking up the peer to chain
* to. For sink pads, the probe function will be called before configuring the
* sink with new caps, if any, and before calling the pad's chain function.
*
* Your data probe should return TRUE to let the data continue to flow, or FALSE
* to drop it. Dropping data is rarely useful, but occasionally comes in handy
* with events.
*
* Although probes are implemented internally by connecting @handler to the
* have-data signal on the pad, if you want to remove a probe it is insufficient
* to only call g_signal_handler_disconnect on the returned handler id. To
* remove a probe, use the appropriate function, such as
* gst_pad_remove_data_probe().
*
* The @notify function is called when the probe is disconnected and usually
* used to free @data.
*
* Returns: The handler id.
*
* Since: 0.10.20
*/
gulong
gst_pad_add_data_probe_full (GstPad * pad, GCallback handler,
gpointer data, GDestroyNotify notify)
{
gulong sigid;
g_return_val_if_fail (GST_IS_PAD (pad), 0);
g_return_val_if_fail (handler != NULL, 0);
GST_OBJECT_LOCK (pad);
/* we only expose a GDestroyNotify in our API because that's less confusing */
sigid = g_signal_connect_data (pad, "have-data", handler, data,
(GClosureNotify) notify, 0);
GST_PAD_DO_EVENT_SIGNALS (pad)++;
GST_PAD_DO_BUFFER_SIGNALS (pad)++;
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad,
"adding data probe, now %d data, %d event probes",
GST_PAD_DO_BUFFER_SIGNALS (pad), GST_PAD_DO_EVENT_SIGNALS (pad));
GST_OBJECT_UNLOCK (pad);
return sigid;
}
/**
* gst_pad_add_event_probe:
* @pad: pad to add the event probe handler to
* @handler: function to call when events are passed over pad
* @data: data to pass along with the handler
*
* Adds a probe that will be called for all events passing through a pad. See
* gst_pad_add_data_probe() for more information.
*
* Returns: The handler id
*/
gulong
gst_pad_add_event_probe (GstPad * pad, GCallback handler, gpointer data)
{
return gst_pad_add_event_probe_full (pad, handler, data, NULL);
}
/**
* gst_pad_add_event_probe_full:
* @pad: pad to add the event probe handler to
* @handler: function to call when events are passed over pad
* @data: data to pass along with the handler, or NULL
* @notify: function to call when probe is disconnected, or NULL
*
* Adds a probe that will be called for all events passing through a pad. See
* gst_pad_add_data_probe() for more information.
*
* The @notify function is called when the probe is disconnected and usually
* used to free @data.
*
* Returns: The handler id
*
* Since: 0.10.20
*/
gulong
gst_pad_add_event_probe_full (GstPad * pad, GCallback handler,
gpointer data, GDestroyNotify notify)
{
gulong sigid;
g_return_val_if_fail (GST_IS_PAD (pad), 0);
g_return_val_if_fail (handler != NULL, 0);
GST_OBJECT_LOCK (pad);
/* we only expose a GDestroyNotify in our API because that's less confusing */
sigid = g_signal_connect_data (pad, "have-data::event", handler, data,
(GClosureNotify) notify, 0);
GST_PAD_DO_EVENT_SIGNALS (pad)++;
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "adding event probe, now %d probes",
GST_PAD_DO_EVENT_SIGNALS (pad));
GST_OBJECT_UNLOCK (pad);
return sigid;
}
/**
* gst_pad_add_buffer_probe:
* @pad: pad to add the buffer probe handler to
* @handler: function to call when buffers are passed over pad
* @data: data to pass along with the handler
*
* Adds a probe that will be called for all buffers passing through a pad. See
* gst_pad_add_data_probe() for more information.
*
* Returns: The handler id
*/
gulong
gst_pad_add_buffer_probe (GstPad * pad, GCallback handler, gpointer data)
{
return gst_pad_add_buffer_probe_full (pad, handler, data, NULL);
}
/**
* gst_pad_add_buffer_probe_full:
* @pad: pad to add the buffer probe handler to
* @handler: function to call when buffer are passed over pad
* @data: data to pass along with the handler
* @notify: function to call when the probe is disconnected, or NULL
*
* Adds a probe that will be called for all buffers passing through a pad. See
* gst_pad_add_data_probe() for more information.
*
* The @notify function is called when the probe is disconnected and usually
* used to free @data.
*
* Returns: The handler id
*
* Since: 0.10.20
*/
gulong
gst_pad_add_buffer_probe_full (GstPad * pad, GCallback handler,
gpointer data, GDestroyNotify notify)
{
gulong sigid;
g_return_val_if_fail (GST_IS_PAD (pad), 0);
g_return_val_if_fail (handler != NULL, 0);
GST_OBJECT_LOCK (pad);
/* we only expose a GDestroyNotify in our API because that's less confusing */
sigid = g_signal_connect_data (pad, "have-data::buffer", handler, data,
(GClosureNotify) notify, 0);
GST_PAD_DO_BUFFER_SIGNALS (pad)++;
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "adding buffer probe, now %d probes",
GST_PAD_DO_BUFFER_SIGNALS (pad));
GST_OBJECT_UNLOCK (pad);
return sigid;
}
/**
* gst_pad_remove_data_probe:
* @pad: pad to remove the data probe handler from
* @handler_id: handler id returned from gst_pad_add_data_probe
*
* Removes a data probe from @pad.
*/
void
gst_pad_remove_data_probe (GstPad * pad, guint handler_id)
{
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (handler_id > 0);
GST_OBJECT_LOCK (pad);
g_signal_handler_disconnect (pad, handler_id);
GST_PAD_DO_BUFFER_SIGNALS (pad)--;
GST_PAD_DO_EVENT_SIGNALS (pad)--;
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad,
"removed data probe, now %d event, %d buffer probes",
GST_PAD_DO_EVENT_SIGNALS (pad), GST_PAD_DO_BUFFER_SIGNALS (pad));
GST_OBJECT_UNLOCK (pad);
}
/**
* gst_pad_remove_event_probe:
* @pad: pad to remove the event probe handler from
* @handler_id: handler id returned from gst_pad_add_event_probe
*
* Removes an event probe from @pad.
*/
void
gst_pad_remove_event_probe (GstPad * pad, guint handler_id)
{
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (handler_id > 0);
GST_OBJECT_LOCK (pad);
g_signal_handler_disconnect (pad, handler_id);
GST_PAD_DO_EVENT_SIGNALS (pad)--;
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad,
"removed event probe, now %d event probes",
GST_PAD_DO_EVENT_SIGNALS (pad));
GST_OBJECT_UNLOCK (pad);
}
/**
* gst_pad_remove_buffer_probe:
* @pad: pad to remove the buffer probe handler from
* @handler_id: handler id returned from gst_pad_add_buffer_probe
*
* Removes a buffer probe from @pad.
*/
void
gst_pad_remove_buffer_probe (GstPad * pad, guint handler_id)
{
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (handler_id > 0);
GST_OBJECT_LOCK (pad);
g_signal_handler_disconnect (pad, handler_id);
GST_PAD_DO_BUFFER_SIGNALS (pad)--;
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad,
"removed buffer probe, now %d buffer probes",
GST_PAD_DO_BUFFER_SIGNALS (pad));
GST_OBJECT_UNLOCK (pad);
}
/**
* gst_element_found_tags_for_pad:
* @element: element for which to post taglist to bus.
* @pad: pad on which to push tag-event.
* @list: the taglist to post on the bus and create event from.
*
* Posts a message to the bus that new tags were found and pushes the
* tags as event. Takes ownership of the @list.
*
* This is a utility method for elements. Applications should use the
* #GstTagSetter interface.
*/
void
gst_element_found_tags_for_pad (GstElement * element,
GstPad * pad, GstTagList * list)
{
g_return_if_fail (element != NULL);
g_return_if_fail (pad != NULL);
g_return_if_fail (list != NULL);
gst_pad_push_event (pad, gst_event_new_tag (gst_tag_list_copy (list)));
gst_element_post_message (element,
gst_message_new_tag (GST_OBJECT (pad), list));
}
static void
push_and_ref (GstPad * pad, GstEvent * event)
{
gst_pad_push_event (pad, gst_event_ref (event));
/* iterator refs pad, we unref when we are done with it */
gst_object_unref (pad);
}
/**
* gst_element_found_tags:
* @element: element for which we found the tags.
* @list: list of tags.
*
* Posts a message to the bus that new tags were found, and pushes an event
* to all sourcepads. Takes ownership of the @list.
*
* This is a utility method for elements. Applications should use the
* #GstTagSetter interface.
*/
void
gst_element_found_tags (GstElement * element, GstTagList * list)
{
GstIterator *iter;
GstEvent *event;
g_return_if_fail (element != NULL);
g_return_if_fail (list != NULL);
iter = gst_element_iterate_src_pads (element);
event = gst_event_new_tag (gst_tag_list_copy (list));
gst_iterator_foreach (iter, (GFunc) push_and_ref, event);
gst_iterator_free (iter);
gst_event_unref (event);
gst_element_post_message (element,
gst_message_new_tag (GST_OBJECT (element), list));
}
static GstPad *
element_find_unlinked_pad (GstElement * element, GstPadDirection direction)
{
GstIterator *iter;
GstPad *unlinked_pad = NULL;
gboolean done;
switch (direction) {
case GST_PAD_SRC:
iter = gst_element_iterate_src_pads (element);
break;
case GST_PAD_SINK:
iter = gst_element_iterate_sink_pads (element);
break;
default:
g_return_val_if_reached (NULL);
}
done = FALSE;
while (!done) {
gpointer pad;
switch (gst_iterator_next (iter, &pad)) {
case GST_ITERATOR_OK:{
GstPad *peer;
GST_CAT_LOG (GST_CAT_ELEMENT_PADS, "examining pad %s:%s",
GST_DEBUG_PAD_NAME (pad));
peer = gst_pad_get_peer (GST_PAD (pad));
if (peer == NULL) {
unlinked_pad = pad;
done = TRUE;
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"found existing unlinked pad %s:%s",
GST_DEBUG_PAD_NAME (unlinked_pad));
} else {
gst_object_unref (pad);
gst_object_unref (peer);
}
break;
}
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (iter);
break;
case GST_ITERATOR_ERROR:
g_return_val_if_reached (NULL);
break;
}
}
gst_iterator_free (iter);
return unlinked_pad;
}
/**
* gst_bin_find_unlinked_pad:
* @bin: bin in which to look for elements with unlinked pads
* @direction: whether to look for an unlinked source or sink pad
*
* Recursively looks for elements with an unlinked pad of the given
* direction within the specified bin and returns an unlinked pad
* if one is found, or NULL otherwise. If a pad is found, the caller
* owns a reference to it and should use gst_object_unref() on the
* pad when it is not needed any longer.
*
* Returns: unlinked pad of the given direction, or NULL.
*
* Since: 0.10.20
*/
GstPad *
gst_bin_find_unlinked_pad (GstBin * bin, GstPadDirection direction)
{
GstIterator *iter;
gboolean done;
GstPad *pad = NULL;
g_return_val_if_fail (GST_IS_BIN (bin), NULL);
g_return_val_if_fail (direction != GST_PAD_UNKNOWN, NULL);
done = FALSE;
iter = gst_bin_iterate_recurse (bin);
while (!done) {
gpointer element;
switch (gst_iterator_next (iter, &element)) {
case GST_ITERATOR_OK:
pad = element_find_unlinked_pad (GST_ELEMENT (element), direction);
gst_object_unref (element);
if (pad != NULL)
done = TRUE;
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (iter);
break;
case GST_ITERATOR_ERROR:
g_return_val_if_reached (NULL);
break;
}
}
gst_iterator_free (iter);
return pad;
}
/**
* gst_bin_find_unconnected_pad:
* @bin: bin in which to look for elements with unlinked pads
* @direction: whether to look for an unlinked source or sink pad
*
* Recursively looks for elements with an unlinked pad of the given
* direction within the specified bin and returns an unlinked pad
* if one is found, or NULL otherwise. If a pad is found, the caller
* owns a reference to it and should use gst_object_unref() on the
* pad when it is not needed any longer.
*
* Returns: unlinked pad of the given direction, or NULL.
*
* Since: 0.10.3
*
* Deprecated: use gst_bin_find_unlinked_pad() instead.
*/
#ifndef GST_REMOVE_DEPRECATED
GstPad *
gst_bin_find_unconnected_pad (GstBin * bin, GstPadDirection direction)
{
return gst_bin_find_unlinked_pad (bin, direction);
}
#endif
/**
* gst_parse_bin_from_description:
* @bin_description: command line describing the bin
* @ghost_unlinked_pads: whether to automatically create ghost pads
* for unlinked source or sink pads within the bin
* @err: where to store the error message in case of an error, or NULL
*
* This is a convenience wrapper around gst_parse_launch() to create a
* #GstBin from a gst-launch-style pipeline description. See
* gst_parse_launch() and the gst-launch man page for details about the
* syntax. Ghost pads on the bin for unlinked source or sink pads
* within the bin can automatically be created (but only a maximum of
* one ghost pad for each direction will be created; if you expect
* multiple unlinked source pads or multiple unlinked sink pads
* and want them all ghosted, you will have to create the ghost pads
* yourself).
*
* Returns: a newly-created bin, or NULL if an error occurred.
*
* Since: 0.10.3
*/
GstElement *
gst_parse_bin_from_description (const gchar * bin_description,
gboolean ghost_unlinked_pads, GError ** err)
{
return gst_parse_bin_from_description_full (bin_description,
ghost_unlinked_pads, NULL, 0, err);
}
/**
* gst_parse_bin_from_description_full:
* @bin_description: command line describing the bin
* @ghost_unlinked_pads: whether to automatically create ghost pads
* for unlinked source or sink pads within the bin
* @context: a parse context allocated with gst_parse_context_new(), or %NULL
* @flags: parsing options, or #GST_PARSE_FLAG_NONE
* @err: where to store the error message in case of an error, or NULL
*
* This is a convenience wrapper around gst_parse_launch() to create a
* #GstBin from a gst-launch-style pipeline description. See
* gst_parse_launch() and the gst-launch man page for details about the
* syntax. Ghost pads on the bin for unlinked source or sink pads
* within the bin can automatically be created (but only a maximum of
* one ghost pad for each direction will be created; if you expect
* multiple unlinked source pads or multiple unlinked sink pads
* and want them all ghosted, you will have to create the ghost pads
* yourself).
*
* Returns: a newly-created bin, or NULL if an error occurred.
*
* Since: 0.10.20
*/
GstElement *
gst_parse_bin_from_description_full (const gchar * bin_description,
gboolean ghost_unlinked_pads, GstParseContext * context,
GstParseFlags flags, GError ** err)
{
#ifndef GST_DISABLE_PARSE
GstPad *pad = NULL;
GstBin *bin;
gchar *desc;
g_return_val_if_fail (bin_description != NULL, NULL);
g_return_val_if_fail (err == NULL || *err == NULL, NULL);
GST_DEBUG ("Making bin from description '%s'", bin_description);
/* parse the pipeline to a bin */
desc = g_strdup_printf ("bin.( %s )", bin_description);
bin = (GstBin *) gst_parse_launch_full (desc, context, flags, err);
g_free (desc);
if (bin == NULL || (err && *err != NULL)) {
if (bin)
gst_object_unref (bin);
return NULL;
}
/* find pads and ghost them if necessary */
if (ghost_unlinked_pads) {
if ((pad = gst_bin_find_unlinked_pad (bin, GST_PAD_SRC))) {
gst_element_add_pad (GST_ELEMENT (bin), gst_ghost_pad_new ("src", pad));
gst_object_unref (pad);
}
if ((pad = gst_bin_find_unlinked_pad (bin, GST_PAD_SINK))) {
gst_element_add_pad (GST_ELEMENT (bin), gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
}
}
return GST_ELEMENT (bin);
#else
gchar *msg;
GST_WARNING ("Disabled API called");
msg = gst_error_get_message (GST_CORE_ERROR, GST_CORE_ERROR_DISABLED);
g_set_error (err, GST_CORE_ERROR, GST_CORE_ERROR_DISABLED, "%s", msg);
g_free (msg);
return NULL;
#endif
}
/**
* gst_type_register_static_full:
* @parent_type: The GType of the parent type the newly registered type will
* derive from
* @type_name: NULL-terminated string used as the name of the new type
* @class_size: Size of the class structure.
* @base_init: Location of the base initialization function (optional).
* @base_finalize: Location of the base finalization function (optional).
* @class_init: Location of the class initialization function for class types
* Location of the default vtable inititalization function for interface
* types. (optional)
* @class_finalize: Location of the class finalization function for class types.
* Location of the default vtable finalization function for interface types.
* (optional)
* @class_data: User-supplied data passed to the class init/finalize functions.
* @instance_size: Size of the instance (object) structure (required for
* instantiatable types only).
* @n_preallocs: The number of pre-allocated (cached) instances to reserve
* memory for (0 indicates no caching). Ignored on recent GLib's.
* @instance_init: Location of the instance initialization function (optional,
* for instantiatable types only).
* @value_table: A GTypeValueTable function table for generic handling of
* GValues of this type (usually only useful for fundamental types).
* @flags: #GTypeFlags for this GType. E.g: G_TYPE_FLAG_ABSTRACT
*
* Helper function which constructs a #GTypeInfo structure and registers a
* GType, but which generates less linker overhead than a static const
* #GTypeInfo structure. For further details of the parameters, please see
* #GTypeInfo in the GLib documentation.
*
* Registers type_name as the name of a new static type derived from
* parent_type. The value of flags determines the nature (e.g. abstract or
* not) of the type. It works by filling a GTypeInfo struct and calling
* g_type_info_register_static().
*
* Returns: A #GType for the newly-registered type.
*
* Since: 0.10.14
*/
GType
gst_type_register_static_full (GType parent_type,
const gchar * type_name,
guint class_size,
GBaseInitFunc base_init,
GBaseFinalizeFunc base_finalize,
GClassInitFunc class_init,
GClassFinalizeFunc class_finalize,
gconstpointer class_data,
guint instance_size,
guint16 n_preallocs,
GInstanceInitFunc instance_init,
const GTypeValueTable * value_table, GTypeFlags flags)
{
GTypeInfo info;
info.class_size = class_size;
info.base_init = base_init;
info.base_finalize = base_finalize;
info.class_init = class_init;
info.class_finalize = class_finalize;
info.class_data = class_data;
info.instance_size = instance_size;
info.n_preallocs = n_preallocs;
info.instance_init = instance_init;
info.value_table = value_table;
return g_type_register_static (parent_type, type_name, &info, flags);
}
/**
* gst_util_get_timestamp:
*
* Get a timestamp as GstClockTime to be used for interval meassurements.
* The timestamp should not be interpreted in any other way.
*
* Returns: the timestamp
*
* Since: 0.10.16
*/
GstClockTime
gst_util_get_timestamp (void)
{
#if defined (HAVE_POSIX_TIMERS) && defined(HAVE_MONOTONIC_CLOCK)
struct timespec now;
clock_gettime (CLOCK_MONOTONIC, &now);
return GST_TIMESPEC_TO_TIME (now);
#else
GTimeVal now;
g_get_current_time (&now);
return GST_TIMEVAL_TO_TIME (now);
#endif
}
/**
* gst_util_array_binary_search:
* @array: the sorted input array
* @num_elements: number of elements in the array
* @element_size: size of every element in bytes
* @search_func: function to compare two elements, @search_data will always be passed as second argument
* @mode: search mode that should be used
* @search_data: element that should be found
* @user_data: data to pass to @search_func
*
* Searches inside @array for @search_data by using the comparison function
* @search_func. @array must be sorted ascending.
*
* As @search_data is always passed as second argument to @search_func it's
* not required that @search_data has the same type as the array elements.
*
* The complexity of this search function is O(log (num_elements)).
*
* Returns: The address of the found element or %NULL if nothing was found
*
* Since: 0.10.23
*/
gpointer
gst_util_array_binary_search (gpointer array, guint num_elements,
gsize element_size, GCompareDataFunc search_func, GstSearchMode mode,
gconstpointer search_data, gpointer user_data)
{
glong left = 0, right = num_elements - 1, m;
gint ret;
guint8 *data = (guint8 *) array;
g_return_val_if_fail (array != NULL, NULL);
g_return_val_if_fail (element_size > 0, NULL);
g_return_val_if_fail (search_func != NULL, NULL);
/* 0. No elements => return NULL */
if (num_elements == 0)
return NULL;
/* 1. If search_data is before the 0th element return the 0th element */
ret = search_func (data, search_data, user_data);
if ((ret >= 0 && mode == GST_SEARCH_MODE_AFTER) || ret == 0)
return data;
else if (ret > 0)
return NULL;
/* 2. If search_data is after the last element return the last element */
ret =
search_func (data + (num_elements - 1) * element_size, search_data,
user_data);
if ((ret <= 0 && mode == GST_SEARCH_MODE_BEFORE) || ret == 0)
return data + (num_elements - 1) * element_size;
else if (ret < 0)
return NULL;
/* 3. else binary search */
while (TRUE) {
m = left + (right - left) / 2;
ret = search_func (data + m * element_size, search_data, user_data);
if (ret == 0) {
return data + m * element_size;
} else if (ret < 0) {
left = m + 1;
} else {
right = m - 1;
}
/* No exact match found */
if (right < left) {
if (mode == GST_SEARCH_MODE_EXACT) {
return NULL;
} else if (mode == GST_SEARCH_MODE_AFTER) {
if (ret < 0)
return (m < num_elements) ? data + (m + 1) * element_size : NULL;
else
return data + m * element_size;
} else {
if (ret < 0)
return data + m * element_size;
else
return (m > 0) ? data + (m - 1) * element_size : NULL;
}
}
}
}