gstreamer/gst/elements/gstfakesrc.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstfakesrc.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstfakesrc.h"
#include <gst/gstmarshal.h>
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (gst_fakesrc_debug);
#define GST_CAT_DEFAULT gst_fakesrc_debug
GstElementDetails gst_fakesrc_details = GST_ELEMENT_DETAILS ("Fake Source",
"Source",
"Push empty (no data) buffers around",
"Erik Walthinsen <omega@cse.ogi.edu>, "
"Wim Taymans <wim.taymans@chello.be>");
/* FakeSrc signals and args */
enum
{
/* FILL ME */
SIGNAL_HANDOFF,
LAST_SIGNAL
};
#define DEFAULT_OUTPUT FAKESRC_FIRST_LAST_LOOP
#define DEFAULT_DATA FAKESRC_DATA_ALLOCATE
#define DEFAULT_SIZETYPE FAKESRC_SIZETYPE_NULL
#define DEFAULT_SIZEMIN 0
#define DEFAULT_SIZEMAX 4096
#define DEFAULT_FILLTYPE FAKESRC_FILLTYPE_NULL
#define DEFAULT_DATARATE 0
#define DEFAULT_SYNC FALSE
#define DEFAULT_PATTERN NULL
#define DEFAULT_NUM_BUFFERS -1
#define DEFAULT_EOS FALSE
#define DEFAULT_SIGNAL_HANDOFFS FALSE
#define DEFAULT_SILENT FALSE
#define DEFAULT_DUMP FALSE
#define DEFAULT_PARENTSIZE 4096*10
enum
{
PROP_0,
PROP_OUTPUT,
PROP_DATA,
PROP_SIZETYPE,
PROP_SIZEMIN,
PROP_SIZEMAX,
PROP_FILLTYPE,
PROP_DATARATE,
PROP_SYNC,
PROP_PATTERN,
PROP_NUM_BUFFERS,
PROP_EOS,
PROP_SIGNAL_HANDOFFS,
PROP_SILENT,
PROP_DUMP,
PROP_PARENTSIZE,
GCC 4 fixen. Original commit message from CVS: 2005-05-04 Andy Wingo <wingo@pobox.com> * check/Makefile.am: * docs/gst/tmpl/gstatomic.sgml: * docs/gst/tmpl/gstplugin.sgml: * gst/base/gstbasesink.c: (gst_basesink_activate): * gst/base/gstbasesrc.c: (gst_basesrc_class_init), (gst_basesrc_init), (gst_basesrc_set_dataflow_funcs), (gst_basesrc_query), (gst_basesrc_set_property), (gst_basesrc_get_property), (gst_basesrc_check_get_range), (gst_basesrc_activate): * gst/base/gstbasesrc.h: * gst/base/gstbasetransform.c: (gst_base_transform_sink_activate), (gst_base_transform_src_activate): * gst/elements/gstelements.c: * gst/elements/gstfakesrc.c: (gst_fakesrc_class_init), (gst_fakesrc_set_property), (gst_fakesrc_get_property): * gst/elements/gsttee.c: (gst_tee_sink_activate): * gst/elements/gsttypefindelement.c: (find_element_get_length), (gst_type_find_element_checkgetrange), (gst_type_find_element_activate): * gst/gstbin.c: (gst_bin_save_thyself), (gst_bin_restore_thyself): * gst/gstcaps.c: (gst_caps_do_simplify), (gst_caps_save_thyself), (gst_caps_load_thyself): * gst/gstelement.c: (gst_element_pads_activate), (gst_element_save_thyself), (gst_element_restore_thyself): * gst/gstpad.c: (gst_pad_load_and_link), (gst_pad_save_thyself), (gst_ghost_pad_save_thyself), (gst_pad_check_pull_range): * gst/gstpad.h: * gst/gstxml.c: (gst_xml_write), (gst_xml_parse_doc), (gst_xml_parse_file), (gst_xml_parse_memory), (gst_xml_get_element), (gst_xml_make_element): * gst/indexers/gstfileindex.c: (gst_file_index_load), (_file_index_id_save_xml), (gst_file_index_commit): * gst/registries/gstlibxmlregistry.c: (read_string), (read_uint), (read_enum), (load_pad_template), (load_feature), (load_plugin), (load_paths): * libs/gst/dataprotocol/dataprotocol.c: (gst_dp_packet_from_caps), (gst_dp_packet_from_event), (gst_dp_caps_from_packet): * tools/gst-complete.c: (main): * tools/gst-compprep.c: (main): * tools/gst-inspect.c: (print_element_properties_info): * tools/gst-launch.c: (xmllaunch_parse_cmdline): * tools/gst-xmlinspect.c: (print_element_properties): GCC 4 fixen.
2005-05-04 21:29:44 +00:00
PROP_LAST_MESSAGE,
PROP_HAS_LOOP,
PROP_HAS_GETRANGE
};
#define GST_TYPE_FAKESRC_OUTPUT (gst_fakesrc_output_get_type())
static GType
gst_fakesrc_output_get_type (void)
{
static GType fakesrc_output_type = 0;
static GEnumValue fakesrc_output[] = {
{FAKESRC_FIRST_LAST_LOOP, "1", "First-Last loop"},
{FAKESRC_LAST_FIRST_LOOP, "2", "Last-First loop"},
{FAKESRC_PING_PONG, "3", "Ping-Pong"},
{FAKESRC_ORDERED_RANDOM, "4", "Ordered Random"},
{FAKESRC_RANDOM, "5", "Random"},
{FAKESRC_PATTERN_LOOP, "6", "Patttern loop"},
{FAKESRC_PING_PONG_PATTERN, "7", "Ping-Pong Pattern"},
{FAKESRC_GET_ALWAYS_SUCEEDS, "8", "'_get' Always succeeds"},
{0, NULL, NULL},
};
if (!fakesrc_output_type) {
fakesrc_output_type =
g_enum_register_static ("GstFakeSrcOutput", fakesrc_output);
}
return fakesrc_output_type;
}
#define GST_TYPE_FAKESRC_DATA (gst_fakesrc_data_get_type())
static GType
gst_fakesrc_data_get_type (void)
{
static GType fakesrc_data_type = 0;
static GEnumValue fakesrc_data[] = {
{FAKESRC_DATA_ALLOCATE, "1", "Allocate data"},
{FAKESRC_DATA_SUBBUFFER, "2", "Subbuffer data"},
{0, NULL, NULL},
};
if (!fakesrc_data_type) {
fakesrc_data_type = g_enum_register_static ("GstFakeSrcData", fakesrc_data);
}
return fakesrc_data_type;
}
#define GST_TYPE_FAKESRC_SIZETYPE (gst_fakesrc_sizetype_get_type())
static GType
gst_fakesrc_sizetype_get_type (void)
{
static GType fakesrc_sizetype_type = 0;
static GEnumValue fakesrc_sizetype[] = {
{FAKESRC_SIZETYPE_NULL, "1", "Send empty buffers"},
{FAKESRC_SIZETYPE_FIXED, "2", "Fixed size buffers (sizemax sized)"},
{FAKESRC_SIZETYPE_RANDOM, "3",
"Random sized buffers (sizemin <= size <= sizemax)"},
{0, NULL, NULL},
};
if (!fakesrc_sizetype_type) {
fakesrc_sizetype_type =
g_enum_register_static ("GstFakeSrcSizeType", fakesrc_sizetype);
}
return fakesrc_sizetype_type;
}
#define GST_TYPE_FAKESRC_FILLTYPE (gst_fakesrc_filltype_get_type())
static GType
gst_fakesrc_filltype_get_type (void)
{
static GType fakesrc_filltype_type = 0;
static GEnumValue fakesrc_filltype[] = {
{FAKESRC_FILLTYPE_NOTHING, "1", "Leave data as malloced"},
{FAKESRC_FILLTYPE_NULL, "2", "Fill buffers with zeros"},
{FAKESRC_FILLTYPE_RANDOM, "3", "Fill buffers with random crap"},
{FAKESRC_FILLTYPE_PATTERN, "4", "Fill buffers with pattern 0x00 -> 0xff"},
{FAKESRC_FILLTYPE_PATTERN_CONT, "5",
"Fill buffers with pattern 0x00 -> 0xff that spans buffers"},
{0, NULL, NULL},
};
if (!fakesrc_filltype_type) {
fakesrc_filltype_type =
g_enum_register_static ("GstFakeSrcFillType", fakesrc_filltype);
}
return fakesrc_filltype_type;
}
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (gst_fakesrc_debug, "fakesrc", 0, "fakesrc element");
GST_BOILERPLATE_FULL (GstFakeSrc, gst_fakesrc, GstBaseSrc, GST_TYPE_BASESRC,
_do_init);
static void gst_fakesrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_fakesrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_fakesrc_start (GstBaseSrc * basesrc);
static gboolean gst_fakesrc_stop (GstBaseSrc * basesrc);
static gboolean gst_fakesrc_event_handler (GstBaseSrc * src, GstEvent * event);
static GstFlowReturn gst_fakesrc_create (GstBaseSrc * src, guint64 offset,
guint length, GstBuffer ** buf);
static guint gst_fakesrc_signals[LAST_SIGNAL] = { 0 };
static void
gst_fakesrc_base_init (gpointer g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_set_details (gstelement_class, &gst_fakesrc_details);
}
static void
gst_fakesrc_class_init (GstFakeSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSrcClass *gstbasesrc_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_fakesrc_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_fakesrc_get_property);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_OUTPUT,
g_param_spec_enum ("output", "output", "Output method (currently unused)",
GST_TYPE_FAKESRC_OUTPUT, DEFAULT_OUTPUT, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DATA,
g_param_spec_enum ("data", "data", "Data allocation method",
GST_TYPE_FAKESRC_DATA, DEFAULT_DATA, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SIZETYPE,
g_param_spec_enum ("sizetype", "sizetype",
"How to determine buffer sizes", GST_TYPE_FAKESRC_SIZETYPE,
DEFAULT_SIZETYPE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SIZEMIN,
g_param_spec_int ("sizemin", "sizemin", "Minimum buffer size", 0,
G_MAXINT, DEFAULT_SIZEMIN, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SIZEMAX,
g_param_spec_int ("sizemax", "sizemax", "Maximum buffer size", 0,
G_MAXINT, DEFAULT_SIZEMAX, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PARENTSIZE,
g_param_spec_int ("parentsize", "parentsize",
"Size of parent buffer for sub-buffered allocation", 0, G_MAXINT,
DEFAULT_PARENTSIZE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILLTYPE,
g_param_spec_enum ("filltype", "filltype",
"How to fill the buffer, if at all", GST_TYPE_FAKESRC_FILLTYPE,
DEFAULT_FILLTYPE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DATARATE,
g_param_spec_int ("datarate", "Datarate",
"Timestamps buffers with number of bytes per second (0 = none)", 0,
G_MAXINT, DEFAULT_DATARATE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SYNC,
g_param_spec_boolean ("sync", "Sync", "Sync to the clock to the datarate",
DEFAULT_SYNC, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PATTERN,
g_param_spec_string ("pattern", "pattern", "pattern", DEFAULT_PATTERN,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_NUM_BUFFERS,
g_param_spec_int ("num-buffers", "num-buffers",
"Number of buffers to output before sending EOS", -1, G_MAXINT,
DEFAULT_NUM_BUFFERS, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_EOS,
g_param_spec_boolean ("eos", "eos", "Send out the EOS event?",
DEFAULT_EOS, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LAST_MESSAGE,
g_param_spec_string ("last-message", "last-message",
"The last status message", NULL, G_PARAM_READABLE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SILENT,
g_param_spec_boolean ("silent", "Silent",
"Don't produce last_message events", DEFAULT_SILENT,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SIGNAL_HANDOFFS,
g_param_spec_boolean ("signal-handoffs", "Signal handoffs",
"Send a signal before pushing the buffer", DEFAULT_SIGNAL_HANDOFFS,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DUMP,
g_param_spec_boolean ("dump", "Dump", "Dump produced bytes to stdout",
DEFAULT_DUMP, G_PARAM_READWRITE));
GCC 4 fixen. Original commit message from CVS: 2005-05-04 Andy Wingo <wingo@pobox.com> * check/Makefile.am: * docs/gst/tmpl/gstatomic.sgml: * docs/gst/tmpl/gstplugin.sgml: * gst/base/gstbasesink.c: (gst_basesink_activate): * gst/base/gstbasesrc.c: (gst_basesrc_class_init), (gst_basesrc_init), (gst_basesrc_set_dataflow_funcs), (gst_basesrc_query), (gst_basesrc_set_property), (gst_basesrc_get_property), (gst_basesrc_check_get_range), (gst_basesrc_activate): * gst/base/gstbasesrc.h: * gst/base/gstbasetransform.c: (gst_base_transform_sink_activate), (gst_base_transform_src_activate): * gst/elements/gstelements.c: * gst/elements/gstfakesrc.c: (gst_fakesrc_class_init), (gst_fakesrc_set_property), (gst_fakesrc_get_property): * gst/elements/gsttee.c: (gst_tee_sink_activate): * gst/elements/gsttypefindelement.c: (find_element_get_length), (gst_type_find_element_checkgetrange), (gst_type_find_element_activate): * gst/gstbin.c: (gst_bin_save_thyself), (gst_bin_restore_thyself): * gst/gstcaps.c: (gst_caps_do_simplify), (gst_caps_save_thyself), (gst_caps_load_thyself): * gst/gstelement.c: (gst_element_pads_activate), (gst_element_save_thyself), (gst_element_restore_thyself): * gst/gstpad.c: (gst_pad_load_and_link), (gst_pad_save_thyself), (gst_ghost_pad_save_thyself), (gst_pad_check_pull_range): * gst/gstpad.h: * gst/gstxml.c: (gst_xml_write), (gst_xml_parse_doc), (gst_xml_parse_file), (gst_xml_parse_memory), (gst_xml_get_element), (gst_xml_make_element): * gst/indexers/gstfileindex.c: (gst_file_index_load), (_file_index_id_save_xml), (gst_file_index_commit): * gst/registries/gstlibxmlregistry.c: (read_string), (read_uint), (read_enum), (load_pad_template), (load_feature), (load_plugin), (load_paths): * libs/gst/dataprotocol/dataprotocol.c: (gst_dp_packet_from_caps), (gst_dp_packet_from_event), (gst_dp_caps_from_packet): * tools/gst-complete.c: (main): * tools/gst-compprep.c: (main): * tools/gst-inspect.c: (print_element_properties_info): * tools/gst-launch.c: (xmllaunch_parse_cmdline): * tools/gst-xmlinspect.c: (print_element_properties): GCC 4 fixen.
2005-05-04 21:29:44 +00:00
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HAS_LOOP,
g_param_spec_boolean ("has-loop", "Has loop function",
"True if the element exposes a loop function", TRUE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HAS_GETRANGE,
g_param_spec_boolean ("has-getrange", "Has getrange function",
"True if the element exposes a getrange function", TRUE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
gst_fakesrc_signals[SIGNAL_HANDOFF] =
g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstFakeSrcClass, handoff), NULL, NULL,
gst_marshal_VOID__BOXED_OBJECT, G_TYPE_NONE, 1,
GST_TYPE_BUFFER | G_SIGNAL_TYPE_STATIC_SCOPE);
GCC 4 fixen. Original commit message from CVS: 2005-05-04 Andy Wingo <wingo@pobox.com> * check/Makefile.am: * docs/gst/tmpl/gstatomic.sgml: * docs/gst/tmpl/gstplugin.sgml: * gst/base/gstbasesink.c: (gst_basesink_activate): * gst/base/gstbasesrc.c: (gst_basesrc_class_init), (gst_basesrc_init), (gst_basesrc_set_dataflow_funcs), (gst_basesrc_query), (gst_basesrc_set_property), (gst_basesrc_get_property), (gst_basesrc_check_get_range), (gst_basesrc_activate): * gst/base/gstbasesrc.h: * gst/base/gstbasetransform.c: (gst_base_transform_sink_activate), (gst_base_transform_src_activate): * gst/elements/gstelements.c: * gst/elements/gstfakesrc.c: (gst_fakesrc_class_init), (gst_fakesrc_set_property), (gst_fakesrc_get_property): * gst/elements/gsttee.c: (gst_tee_sink_activate): * gst/elements/gsttypefindelement.c: (find_element_get_length), (gst_type_find_element_checkgetrange), (gst_type_find_element_activate): * gst/gstbin.c: (gst_bin_save_thyself), (gst_bin_restore_thyself): * gst/gstcaps.c: (gst_caps_do_simplify), (gst_caps_save_thyself), (gst_caps_load_thyself): * gst/gstelement.c: (gst_element_pads_activate), (gst_element_save_thyself), (gst_element_restore_thyself): * gst/gstpad.c: (gst_pad_load_and_link), (gst_pad_save_thyself), (gst_ghost_pad_save_thyself), (gst_pad_check_pull_range): * gst/gstpad.h: * gst/gstxml.c: (gst_xml_write), (gst_xml_parse_doc), (gst_xml_parse_file), (gst_xml_parse_memory), (gst_xml_get_element), (gst_xml_make_element): * gst/indexers/gstfileindex.c: (gst_file_index_load), (_file_index_id_save_xml), (gst_file_index_commit): * gst/registries/gstlibxmlregistry.c: (read_string), (read_uint), (read_enum), (load_pad_template), (load_feature), (load_plugin), (load_paths): * libs/gst/dataprotocol/dataprotocol.c: (gst_dp_packet_from_caps), (gst_dp_packet_from_event), (gst_dp_caps_from_packet): * tools/gst-complete.c: (main): * tools/gst-compprep.c: (main): * tools/gst-inspect.c: (print_element_properties_info): * tools/gst-launch.c: (xmllaunch_parse_cmdline): * tools/gst-xmlinspect.c: (print_element_properties): GCC 4 fixen.
2005-05-04 21:29:44 +00:00
/*gstbasesrc_class->is_seekable = GST_DEBUG_FUNCPTR (gst_fakesrc_is_seekable); */
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_fakesrc_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_fakesrc_stop);
gstbasesrc_class->event = GST_DEBUG_FUNCPTR (gst_fakesrc_event_handler);
gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_fakesrc_create);
}
static void
gst_fakesrc_init (GstFakeSrc * fakesrc)
{
fakesrc->output = FAKESRC_FIRST_LAST_LOOP;
fakesrc->segment_start = -1;
fakesrc->segment_end = -1;
fakesrc->num_buffers = DEFAULT_NUM_BUFFERS;
fakesrc->rt_num_buffers = -1;
fakesrc->buffer_count = 0;
fakesrc->silent = DEFAULT_SILENT;
fakesrc->signal_handoffs = DEFAULT_SIGNAL_HANDOFFS;
fakesrc->dump = DEFAULT_DUMP;
fakesrc->pattern_byte = 0x00;
fakesrc->data = FAKESRC_DATA_ALLOCATE;
fakesrc->sizetype = FAKESRC_SIZETYPE_NULL;
fakesrc->filltype = FAKESRC_FILLTYPE_NOTHING;
fakesrc->sizemin = DEFAULT_SIZEMIN;
fakesrc->sizemax = DEFAULT_SIZEMAX;
fakesrc->parent = NULL;
fakesrc->parentsize = DEFAULT_PARENTSIZE;
fakesrc->last_message = NULL;
fakesrc->datarate = DEFAULT_DATARATE;
fakesrc->sync = DEFAULT_SYNC;
}
static gboolean
gst_fakesrc_event_handler (GstBaseSrc * basesrc, GstEvent * event)
{
GstFakeSrc *src;
src = GST_FAKESRC (basesrc);
if (!src->silent) {
g_free (src->last_message);
src->last_message =
g_strdup_printf ("event ******* E (type: %d) %p",
GST_EVENT_TYPE (event), event);
g_object_notify (G_OBJECT (src), "last_message");
}
return TRUE;
}
static void
gst_fakesrc_alloc_parent (GstFakeSrc * src)
{
GstBuffer *buf;
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = g_malloc (src->parentsize);
GST_BUFFER_SIZE (buf) = src->parentsize;
src->parent = buf;
src->parentoffset = 0;
}
static void
gst_fakesrc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstFakeSrc *src;
src = GST_FAKESRC (object);
switch (prop_id) {
case PROP_OUTPUT:
g_warning ("not yet implemented");
break;
case PROP_DATA:
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
src->data = g_value_get_enum (value);
if (src->data == FAKESRC_DATA_SUBBUFFER) {
if (!src->parent)
gst_fakesrc_alloc_parent (src);
} else {
if (src->parent) {
gst_buffer_unref (src->parent);
src->parent = NULL;
}
}
break;
case PROP_SIZETYPE:
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
src->sizetype = g_value_get_enum (value);
break;
case PROP_SIZEMIN:
src->sizemin = g_value_get_int (value);
break;
case PROP_SIZEMAX:
src->sizemax = g_value_get_int (value);
break;
case PROP_PARENTSIZE:
src->parentsize = g_value_get_int (value);
break;
case PROP_FILLTYPE:
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
src->filltype = g_value_get_enum (value);
break;
case PROP_DATARATE:
src->datarate = g_value_get_int (value);
break;
case PROP_SYNC:
src->sync = g_value_get_boolean (value);
break;
case PROP_PATTERN:
break;
case PROP_NUM_BUFFERS:
src->num_buffers = g_value_get_int (value);
break;
case PROP_EOS:
src->eos = g_value_get_boolean (value);
GST_INFO ("will EOS on next buffer");
break;
case PROP_SILENT:
src->silent = g_value_get_boolean (value);
break;
case PROP_SIGNAL_HANDOFFS:
src->signal_handoffs = g_value_get_boolean (value);
break;
case PROP_DUMP:
src->dump = g_value_get_boolean (value);
break;
GCC 4 fixen. Original commit message from CVS: 2005-05-04 Andy Wingo <wingo@pobox.com> * check/Makefile.am: * docs/gst/tmpl/gstatomic.sgml: * docs/gst/tmpl/gstplugin.sgml: * gst/base/gstbasesink.c: (gst_basesink_activate): * gst/base/gstbasesrc.c: (gst_basesrc_class_init), (gst_basesrc_init), (gst_basesrc_set_dataflow_funcs), (gst_basesrc_query), (gst_basesrc_set_property), (gst_basesrc_get_property), (gst_basesrc_check_get_range), (gst_basesrc_activate): * gst/base/gstbasesrc.h: * gst/base/gstbasetransform.c: (gst_base_transform_sink_activate), (gst_base_transform_src_activate): * gst/elements/gstelements.c: * gst/elements/gstfakesrc.c: (gst_fakesrc_class_init), (gst_fakesrc_set_property), (gst_fakesrc_get_property): * gst/elements/gsttee.c: (gst_tee_sink_activate): * gst/elements/gsttypefindelement.c: (find_element_get_length), (gst_type_find_element_checkgetrange), (gst_type_find_element_activate): * gst/gstbin.c: (gst_bin_save_thyself), (gst_bin_restore_thyself): * gst/gstcaps.c: (gst_caps_do_simplify), (gst_caps_save_thyself), (gst_caps_load_thyself): * gst/gstelement.c: (gst_element_pads_activate), (gst_element_save_thyself), (gst_element_restore_thyself): * gst/gstpad.c: (gst_pad_load_and_link), (gst_pad_save_thyself), (gst_ghost_pad_save_thyself), (gst_pad_check_pull_range): * gst/gstpad.h: * gst/gstxml.c: (gst_xml_write), (gst_xml_parse_doc), (gst_xml_parse_file), (gst_xml_parse_memory), (gst_xml_get_element), (gst_xml_make_element): * gst/indexers/gstfileindex.c: (gst_file_index_load), (_file_index_id_save_xml), (gst_file_index_commit): * gst/registries/gstlibxmlregistry.c: (read_string), (read_uint), (read_enum), (load_pad_template), (load_feature), (load_plugin), (load_paths): * libs/gst/dataprotocol/dataprotocol.c: (gst_dp_packet_from_caps), (gst_dp_packet_from_event), (gst_dp_caps_from_packet): * tools/gst-complete.c: (main): * tools/gst-compprep.c: (main): * tools/gst-inspect.c: (print_element_properties_info): * tools/gst-launch.c: (xmllaunch_parse_cmdline): * tools/gst-xmlinspect.c: (print_element_properties): GCC 4 fixen.
2005-05-04 21:29:44 +00:00
case PROP_HAS_LOOP:
g_return_if_fail (!GST_FLAG_IS_SET (object, GST_BASESRC_STARTED));
src->has_loop = g_value_get_boolean (value);
break;
case PROP_HAS_GETRANGE:
g_return_if_fail (!GST_FLAG_IS_SET (object, GST_BASESRC_STARTED));
src->has_getrange = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_fakesrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstFakeSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FAKESRC (object));
src = GST_FAKESRC (object);
switch (prop_id) {
case PROP_OUTPUT:
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
g_value_set_enum (value, src->output);
break;
case PROP_DATA:
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
g_value_set_enum (value, src->data);
break;
case PROP_SIZETYPE:
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
g_value_set_enum (value, src->sizetype);
break;
case PROP_SIZEMIN:
g_value_set_int (value, src->sizemin);
break;
case PROP_SIZEMAX:
g_value_set_int (value, src->sizemax);
break;
case PROP_PARENTSIZE:
g_value_set_int (value, src->parentsize);
break;
case PROP_FILLTYPE:
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
g_value_set_enum (value, src->filltype);
break;
case PROP_DATARATE:
g_value_set_int (value, src->datarate);
break;
case PROP_SYNC:
g_value_set_boolean (value, src->sync);
break;
case PROP_PATTERN:
g_value_set_string (value, src->pattern);
break;
case PROP_NUM_BUFFERS:
g_value_set_int (value, src->num_buffers);
break;
case PROP_EOS:
g_value_set_boolean (value, src->eos);
break;
case PROP_SILENT:
g_value_set_boolean (value, src->silent);
break;
case PROP_SIGNAL_HANDOFFS:
g_value_set_boolean (value, src->signal_handoffs);
break;
case PROP_DUMP:
g_value_set_boolean (value, src->dump);
break;
case PROP_LAST_MESSAGE:
g_value_set_string (value, src->last_message);
break;
GCC 4 fixen. Original commit message from CVS: 2005-05-04 Andy Wingo <wingo@pobox.com> * check/Makefile.am: * docs/gst/tmpl/gstatomic.sgml: * docs/gst/tmpl/gstplugin.sgml: * gst/base/gstbasesink.c: (gst_basesink_activate): * gst/base/gstbasesrc.c: (gst_basesrc_class_init), (gst_basesrc_init), (gst_basesrc_set_dataflow_funcs), (gst_basesrc_query), (gst_basesrc_set_property), (gst_basesrc_get_property), (gst_basesrc_check_get_range), (gst_basesrc_activate): * gst/base/gstbasesrc.h: * gst/base/gstbasetransform.c: (gst_base_transform_sink_activate), (gst_base_transform_src_activate): * gst/elements/gstelements.c: * gst/elements/gstfakesrc.c: (gst_fakesrc_class_init), (gst_fakesrc_set_property), (gst_fakesrc_get_property): * gst/elements/gsttee.c: (gst_tee_sink_activate): * gst/elements/gsttypefindelement.c: (find_element_get_length), (gst_type_find_element_checkgetrange), (gst_type_find_element_activate): * gst/gstbin.c: (gst_bin_save_thyself), (gst_bin_restore_thyself): * gst/gstcaps.c: (gst_caps_do_simplify), (gst_caps_save_thyself), (gst_caps_load_thyself): * gst/gstelement.c: (gst_element_pads_activate), (gst_element_save_thyself), (gst_element_restore_thyself): * gst/gstpad.c: (gst_pad_load_and_link), (gst_pad_save_thyself), (gst_ghost_pad_save_thyself), (gst_pad_check_pull_range): * gst/gstpad.h: * gst/gstxml.c: (gst_xml_write), (gst_xml_parse_doc), (gst_xml_parse_file), (gst_xml_parse_memory), (gst_xml_get_element), (gst_xml_make_element): * gst/indexers/gstfileindex.c: (gst_file_index_load), (_file_index_id_save_xml), (gst_file_index_commit): * gst/registries/gstlibxmlregistry.c: (read_string), (read_uint), (read_enum), (load_pad_template), (load_feature), (load_plugin), (load_paths): * libs/gst/dataprotocol/dataprotocol.c: (gst_dp_packet_from_caps), (gst_dp_packet_from_event), (gst_dp_caps_from_packet): * tools/gst-complete.c: (main): * tools/gst-compprep.c: (main): * tools/gst-inspect.c: (print_element_properties_info): * tools/gst-launch.c: (xmllaunch_parse_cmdline): * tools/gst-xmlinspect.c: (print_element_properties): GCC 4 fixen.
2005-05-04 21:29:44 +00:00
case PROP_HAS_LOOP:
g_value_set_boolean (value, src->has_loop);
break;
case PROP_HAS_GETRANGE:
g_value_set_boolean (value, src->has_getrange);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
Changed the way things are scheduled, especially sources. A Src used to have a push() function, and optionally a pus... Original commit message from CVS: Changed the way things are scheduled, especially sources. A Src used to have a push() function, and optionally a pushregion() to deal with async reads, etc. That whole thing has gone away, in favor of providing a pull() function for the output (Src) pad instead, ala chain functions. This makes constructing cothreaded schedules out of non-loop elements somewhat easier. Basically there was always a question as to which pad was being dealt with. In the pullregion case, cothread-specific data was used to try to pass the region struct to the right place, which is a slow hack. And in general, the push function severely limited the kind of tricks that could be played when there's more than one output pad, such as a multi-out file reader with async capabilities on each pad independently. This changes the way cothread scheduling occurs. Instead of the hack to deal with Src's by calling their push() function (or optionally the pushregion(), in certain cases), we now are working towards a general mechanism where pads are the only thing that are dealt with directly. An optimization was made in the process of doing this: the loopfunction actually run as the outer [stack] frame of the cothread is now set more intelligently in create_plan() based on what kind of element it is. We now have: loopfunc_wrapper: used for loop-based elements, it simply calls the loopfunc in a loop, paying attention to COTHREAD_STOPPING (see below). It currently does other, soon to be depracated, stuff. pullsrc_wrapper: wraps a Src that's not loop-based (since your options are now loop- or pull-based) There will be a couple more to deal with other cases, such as Connections and chain-based elements. The general idea is that it's a lot more efficient to make the decisions once in create_plan than to keep doing this huge if/else chain in the wrapper. Just choose the right wrapper up front. It'll be most apparent performance-wise in the case of whichever element context is switched to first for each iteration, since the whole wrapper setup is done for every iteration. The tricky part is that there is now a bit of overloading of the function pointers in a pad. The current meanings (possibly to change a bit more soon) are: chainfunc: as always, chainfunc pointer is mirrored between peer pads (this may change, and the chain func may end up in pushfunc) pushfunc: SrcPad: gst_pad_pushfunc_proxy, cothread_switch to peer SinkPad: none (may take over chainfunc, see below) pullfunc: SrcPad: Src or Connection's function to construct buffers SinkPad: gst_pad_pullfunc_proxy, cothread_switch to peer There are a number of issues remaining with the scheduling, not the least of which is the fact that Connections are still dealt with the old way, with _push() functions and such. I'm trying to figure out a way to unify the system so it makes sense. Following the scheduling system is hard enough, trying to change it is murder. Another useful scheduling addition, mentioned above, is COTHREAD_STOPPING. It's an element flag that's used to signal whatever code is running in cothread context that it should be finishing up and exiting soon. An example of this is in plugins/cobin/spindentity.c. All the loops should now be composed of do/while loops, rather than while(1) loops: do { buf = gst_pad_pull(spindentity->sinkpad); gst_pad_push(spindentity->srcpad,buf); } while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element)); The reason for this is that COTHREAD_STOPPING may be set before the above loop ever gets started. It wouldn't do for the body of the loop to never once get called, that would simply stall the pipeline. Note that only the core library code is ever responsible for setting and unsetting this flag. All elements have to do is respond to it by cleanly exiting the loop and the function holding it. This is needed primarily to allow iterations to occur properly. Basically, there's a single entry point in the cothread scheduling loop, gst_bin_iterate_func() simply switches to this cothread. If the element in this context is allowed to loop infinitely, nothing would even switch back to the context from which the iterate() was originally called. This is a bit of a problem. The solution is for there to be an implicit switch back to the originating context. Now, even I'm not sure exactly how this works, but if the cothread that's switched to actually returns, execution returns back to the calling context, i.e. iterate_func(). COTHREAD_STOPPING is therefore set just before switching into this (currently randomly chosen) context, on the assumption that it will return promptly after finishing its duties. The burden of clearing the flag falls to the various wrapper functions provided by the Bin code, thus element writers don't have to worry about doing that at all (and simply shouldn't). Related changes: All the sources in elements/ have been changed to reflect the new system. FIXMEs: 1) gstpipeline.c calls gst_src_push at some point, dunno why, it's commented out now. 2) any other sources, including vcdsrc, dvdsrc, and v4lsrc will break badly and need to be modified to work as pull-based sources.
2000-12-04 10:52:30 +00:00
}
static void
gst_fakesrc_prepare_buffer (GstFakeSrc * src, GstBuffer * buf)
{
if (GST_BUFFER_SIZE (buf) == 0)
return;
switch (src->filltype) {
case FAKESRC_FILLTYPE_NULL:
memset (GST_BUFFER_DATA (buf), 0, GST_BUFFER_SIZE (buf));
break;
case FAKESRC_FILLTYPE_RANDOM:
{
gint i;
guint8 *ptr = GST_BUFFER_DATA (buf);
for (i = GST_BUFFER_SIZE (buf); i; i--) {
*ptr++ = (gint8) ((255.0) * rand () / (RAND_MAX));
}
break;
}
case FAKESRC_FILLTYPE_PATTERN:
src->pattern_byte = 0x00;
case FAKESRC_FILLTYPE_PATTERN_CONT:
{
gint i;
guint8 *ptr = GST_BUFFER_DATA (buf);
for (i = GST_BUFFER_SIZE (buf); i; i--) {
*ptr++ = src->pattern_byte++;
}
break;
}
case FAKESRC_FILLTYPE_NOTHING:
default:
break;
}
}
static GstBuffer *
gst_fakesrc_alloc_buffer (GstFakeSrc * src, guint size)
{
GstBuffer *buf;
buf = gst_buffer_new ();
GST_BUFFER_SIZE (buf) = size;
if (size != 0) {
switch (src->filltype) {
case FAKESRC_FILLTYPE_NOTHING:
GST_BUFFER_DATA (buf) = g_malloc (size);
break;
case FAKESRC_FILLTYPE_NULL:
GST_BUFFER_DATA (buf) = g_malloc0 (size);
break;
case FAKESRC_FILLTYPE_RANDOM:
case FAKESRC_FILLTYPE_PATTERN:
case FAKESRC_FILLTYPE_PATTERN_CONT:
default:
GST_BUFFER_DATA (buf) = g_malloc (size);
gst_fakesrc_prepare_buffer (src, buf);
break;
}
}
return buf;
}
static guint
gst_fakesrc_get_size (GstFakeSrc * src)
{
guint size;
switch (src->sizetype) {
case FAKESRC_SIZETYPE_FIXED:
size = src->sizemax;
break;
case FAKESRC_SIZETYPE_RANDOM:
size =
src->sizemin +
(guint8) (((gfloat) src->sizemax) * rand () / (RAND_MAX +
(gfloat) src->sizemin));
break;
case FAKESRC_SIZETYPE_NULL:
default:
size = 0;
break;
}
return size;
}
static GstBuffer *
gst_fakesrc_create_buffer (GstFakeSrc * src)
{
GstBuffer *buf;
guint size;
gboolean dump = src->dump;
size = gst_fakesrc_get_size (src);
if (size == 0)
return gst_buffer_new ();
switch (src->data) {
case FAKESRC_DATA_ALLOCATE:
buf = gst_fakesrc_alloc_buffer (src, size);
break;
case FAKESRC_DATA_SUBBUFFER:
/* see if we have a parent to subbuffer */
if (!src->parent) {
gst_fakesrc_alloc_parent (src);
g_assert (src->parent);
}
/* see if it's large enough */
if ((GST_BUFFER_SIZE (src->parent) - src->parentoffset) >= size) {
buf = gst_buffer_create_sub (src->parent, src->parentoffset, size);
src->parentoffset += size;
} else {
/* the parent is useless now */
gst_buffer_unref (src->parent);
src->parent = NULL;
/* try again (this will allocate a new parent) */
return gst_fakesrc_create_buffer (src);
}
gst_fakesrc_prepare_buffer (src, buf);
break;
default:
g_warning ("fakesrc: dunno how to allocate buffers !");
buf = gst_buffer_new ();
break;
}
if (dump) {
gst_util_dump_mem (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
}
return buf;
}
static GstFlowReturn
gst_fakesrc_create (GstBaseSrc * basesrc, guint64 offset, guint length,
GstBuffer ** ret)
{
Changed the way things are scheduled, especially sources. A Src used to have a push() function, and optionally a pus... Original commit message from CVS: Changed the way things are scheduled, especially sources. A Src used to have a push() function, and optionally a pushregion() to deal with async reads, etc. That whole thing has gone away, in favor of providing a pull() function for the output (Src) pad instead, ala chain functions. This makes constructing cothreaded schedules out of non-loop elements somewhat easier. Basically there was always a question as to which pad was being dealt with. In the pullregion case, cothread-specific data was used to try to pass the region struct to the right place, which is a slow hack. And in general, the push function severely limited the kind of tricks that could be played when there's more than one output pad, such as a multi-out file reader with async capabilities on each pad independently. This changes the way cothread scheduling occurs. Instead of the hack to deal with Src's by calling their push() function (or optionally the pushregion(), in certain cases), we now are working towards a general mechanism where pads are the only thing that are dealt with directly. An optimization was made in the process of doing this: the loopfunction actually run as the outer [stack] frame of the cothread is now set more intelligently in create_plan() based on what kind of element it is. We now have: loopfunc_wrapper: used for loop-based elements, it simply calls the loopfunc in a loop, paying attention to COTHREAD_STOPPING (see below). It currently does other, soon to be depracated, stuff. pullsrc_wrapper: wraps a Src that's not loop-based (since your options are now loop- or pull-based) There will be a couple more to deal with other cases, such as Connections and chain-based elements. The general idea is that it's a lot more efficient to make the decisions once in create_plan than to keep doing this huge if/else chain in the wrapper. Just choose the right wrapper up front. It'll be most apparent performance-wise in the case of whichever element context is switched to first for each iteration, since the whole wrapper setup is done for every iteration. The tricky part is that there is now a bit of overloading of the function pointers in a pad. The current meanings (possibly to change a bit more soon) are: chainfunc: as always, chainfunc pointer is mirrored between peer pads (this may change, and the chain func may end up in pushfunc) pushfunc: SrcPad: gst_pad_pushfunc_proxy, cothread_switch to peer SinkPad: none (may take over chainfunc, see below) pullfunc: SrcPad: Src or Connection's function to construct buffers SinkPad: gst_pad_pullfunc_proxy, cothread_switch to peer There are a number of issues remaining with the scheduling, not the least of which is the fact that Connections are still dealt with the old way, with _push() functions and such. I'm trying to figure out a way to unify the system so it makes sense. Following the scheduling system is hard enough, trying to change it is murder. Another useful scheduling addition, mentioned above, is COTHREAD_STOPPING. It's an element flag that's used to signal whatever code is running in cothread context that it should be finishing up and exiting soon. An example of this is in plugins/cobin/spindentity.c. All the loops should now be composed of do/while loops, rather than while(1) loops: do { buf = gst_pad_pull(spindentity->sinkpad); gst_pad_push(spindentity->srcpad,buf); } while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element)); The reason for this is that COTHREAD_STOPPING may be set before the above loop ever gets started. It wouldn't do for the body of the loop to never once get called, that would simply stall the pipeline. Note that only the core library code is ever responsible for setting and unsetting this flag. All elements have to do is respond to it by cleanly exiting the loop and the function holding it. This is needed primarily to allow iterations to occur properly. Basically, there's a single entry point in the cothread scheduling loop, gst_bin_iterate_func() simply switches to this cothread. If the element in this context is allowed to loop infinitely, nothing would even switch back to the context from which the iterate() was originally called. This is a bit of a problem. The solution is for there to be an implicit switch back to the originating context. Now, even I'm not sure exactly how this works, but if the cothread that's switched to actually returns, execution returns back to the calling context, i.e. iterate_func(). COTHREAD_STOPPING is therefore set just before switching into this (currently randomly chosen) context, on the assumption that it will return promptly after finishing its duties. The burden of clearing the flag falls to the various wrapper functions provided by the Bin code, thus element writers don't have to worry about doing that at all (and simply shouldn't). Related changes: All the sources in elements/ have been changed to reflect the new system. FIXMEs: 1) gstpipeline.c calls gst_src_push at some point, dunno why, it's commented out now. 2) any other sources, including vcdsrc, dvdsrc, and v4lsrc will break badly and need to be modified to work as pull-based sources.
2000-12-04 10:52:30 +00:00
GstFakeSrc *src;
GstBuffer *buf;
GstClockTime time;
src = GST_FAKESRC (basesrc);
if (src->buffer_count == src->segment_end) {
GST_INFO ("buffer_count reaches segment_end %d %d", src->buffer_count,
src->segment_end);
return GST_FLOW_UNEXPECTED;
}
if (src->rt_num_buffers == 0) {
return GST_FLOW_UNEXPECTED;
} else {
if (src->rt_num_buffers > 0)
src->rt_num_buffers--;
}
if (src->eos) {
GST_INFO ("fakesrc is setting eos on pad");
return GST_FLOW_UNEXPECTED;
}
buf = gst_fakesrc_create_buffer (src);
GST_BUFFER_OFFSET (buf) = src->buffer_count++;
time = GST_CLOCK_TIME_NONE;
if (src->datarate > 0) {
time = (src->bytes_sent * GST_SECOND) / src->datarate;
if (src->sync) {
/* gst_element_wait (GST_ELEMENT (src), time); */
}
GST_BUFFER_DURATION (buf) =
GST_BUFFER_SIZE (buf) * GST_SECOND / src->datarate;
}
GST_BUFFER_TIMESTAMP (buf) = time;
if (!src->silent) {
g_free (src->last_message);
src->last_message =
g_strdup_printf ("get ******* > (%d bytes, %"
G_GUINT64_FORMAT " ) %p",
GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf), buf);
g_object_notify (G_OBJECT (src), "last_message");
}
if (src->signal_handoffs) {
GST_LOG_OBJECT (src, "pre handoff emit");
g_signal_emit (G_OBJECT (src), gst_fakesrc_signals[SIGNAL_HANDOFF], 0, buf);
GST_LOG_OBJECT (src, "post handoff emit");
}
src->bytes_sent += GST_BUFFER_SIZE (buf);
*ret = buf;
return GST_FLOW_OK;
}
static gboolean
gst_fakesrc_start (GstBaseSrc * basesrc)
{
GstFakeSrc *src;
src = GST_FAKESRC (basesrc);
src->buffer_count = 0;
src->pattern_byte = 0x00;
src->eos = FALSE;
src->bytes_sent = 0;
src->rt_num_buffers = src->num_buffers;
return TRUE;
}
static gboolean
gst_fakesrc_stop (GstBaseSrc * basesrc)
{
GstFakeSrc *src;
src = GST_FAKESRC (basesrc);
if (src->parent) {
gst_buffer_unref (src->parent);
src->parent = NULL;
}
g_free (src->last_message);
src->last_message = NULL;
return TRUE;
}