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gstreamer/plugins/elements/gstfakesrc.c
Thomas Vander Stichele ac9d8868a5 catch wrong state changes in element base class 
Original commit message from CVS:
catch wrong state changes in element base class
2004-07-09 11:20:59 +00:00

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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>
#define DEFAULT_SIZEMIN 0
#define DEFAULT_SIZEMAX 4096
#define DEFAULT_PARENTSIZE 4096*10
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
};
enum
{
ARG_0,
ARG_NUM_SOURCES,
ARG_LOOP_BASED,
ARG_OUTPUT,
ARG_DATA,
ARG_SIZETYPE,
ARG_SIZEMIN,
ARG_SIZEMAX,
ARG_FILLTYPE,
ARG_PATTERN,
ARG_NUM_BUFFERS,
ARG_EOS,
ARG_SIGNAL_HANDOFFS,
ARG_SILENT,
ARG_DUMP,
ARG_PARENTSIZE,
ARG_LAST_MESSAGE
};
GstStaticPadTemplate fakesrc_src_template = GST_STATIC_PAD_TEMPLATE ("src%d",
GST_PAD_SRC,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
#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, GstElement, GST_TYPE_ELEMENT,
_do_init);
static GstPad *gst_fakesrc_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused);
static void gst_fakesrc_update_functions (GstFakeSrc * src);
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 GstElementStateReturn gst_fakesrc_change_state (GstElement * element);
static GstData *gst_fakesrc_get (GstPad * pad);
static void gst_fakesrc_loop (GstElement * element);
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_set_details (gstelement_class, &gst_fakesrc_details);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&fakesrc_src_template));
}
static void
gst_fakesrc_class_init (GstFakeSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_SOURCES,
g_param_spec_int ("num-sources", "num-sources", "Number of sources",
1, G_MAXINT, 1, G_PARAM_READABLE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOOP_BASED,
g_param_spec_boolean ("loop-based", "loop-based",
"Enable loop-based operation", FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_OUTPUT,
g_param_spec_enum ("output", "output", "Output method (currently unused)",
GST_TYPE_FAKESRC_OUTPUT, FAKESRC_FIRST_LAST_LOOP, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DATA,
g_param_spec_enum ("data", "data", "Data allocation method",
GST_TYPE_FAKESRC_DATA, FAKESRC_DATA_ALLOCATE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SIZETYPE,
g_param_spec_enum ("sizetype", "sizetype",
"How to determine buffer sizes", GST_TYPE_FAKESRC_SIZETYPE,
FAKESRC_SIZETYPE_NULL, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_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), ARG_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), ARG_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), ARG_FILLTYPE,
g_param_spec_enum ("filltype", "filltype",
"How to fill the buffer, if at all", GST_TYPE_FAKESRC_FILLTYPE,
FAKESRC_FILLTYPE_NULL, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PATTERN,
g_param_spec_string ("pattern", "pattern", "pattern", NULL,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_BUFFERS,
g_param_spec_int ("num-buffers", "num-buffers",
"Number of buffers to output before sending EOS", -1, G_MAXINT,
0, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_EOS,
g_param_spec_boolean ("eos", "eos", "Send out the EOS event?", TRUE,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_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), ARG_SILENT,
g_param_spec_boolean ("silent", "Silent",
"Don't produce last_message events", FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SIGNAL_HANDOFFS,
g_param_spec_boolean ("signal-handoffs", "Signal handoffs",
"Send a signal before pushing the buffer", FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DUMP,
g_param_spec_boolean ("dump", "Dump", "Dump produced bytes to stdout",
FALSE, G_PARAM_READWRITE));
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__POINTER_OBJECT, G_TYPE_NONE, 2,
GST_TYPE_BUFFER | G_SIGNAL_TYPE_STATIC_SCOPE, GST_TYPE_PAD);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_fakesrc_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_fakesrc_get_property);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_fakesrc_request_new_pad);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_fakesrc_change_state);
}
static void
gst_fakesrc_init (GstFakeSrc * fakesrc)
{
GstPad *pad;
/* create our first output pad */
pad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (fakesrc), pad);
fakesrc->loop_based = FALSE;
gst_fakesrc_update_functions (fakesrc);
fakesrc->output = FAKESRC_FIRST_LAST_LOOP;
fakesrc->segment_start = -1;
fakesrc->segment_end = -1;
fakesrc->num_buffers = -1;
fakesrc->rt_num_buffers = -1;
fakesrc->buffer_count = 0;
fakesrc->silent = FALSE;
fakesrc->signal_handoffs = FALSE;
fakesrc->dump = FALSE;
fakesrc->pattern_byte = 0x00;
fakesrc->need_flush = FALSE;
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;
}
static GstPad *
gst_fakesrc_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * unused)
{
gchar *name;
GstPad *srcpad;
GstFakeSrc *fakesrc;
g_return_val_if_fail (GST_IS_FAKESRC (element), NULL);
if (templ->direction != GST_PAD_SRC) {
g_warning ("gstfakesrc: request new pad that is not a SRC pad\n");
return NULL;
}
fakesrc = GST_FAKESRC (element);
name = g_strdup_printf ("src%d", GST_ELEMENT (fakesrc)->numsrcpads);
srcpad = gst_pad_new_from_template (templ, name);
gst_element_add_pad (GST_ELEMENT (fakesrc), srcpad);
gst_fakesrc_update_functions (fakesrc);
g_free (name);
return srcpad;
}
static const GstFormat *
gst_fakesrc_get_formats (GstPad * pad)
{
static const GstFormat formats[] = {
GST_FORMAT_DEFAULT,
0,
};
return formats;
}
static const GstQueryType *
gst_fakesrc_get_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
GST_QUERY_START,
GST_QUERY_SEGMENT_END,
0,
};
return types;
}
static gboolean
gst_fakesrc_query (GstPad * pad, GstQueryType type,
GstFormat * format, gint64 * value)
{
GstFakeSrc *src = GST_FAKESRC (GST_PAD_PARENT (pad));
switch (type) {
case GST_QUERY_TOTAL:
*value = src->num_buffers;
break;
case GST_QUERY_POSITION:
*value = src->buffer_count;
break;
case GST_QUERY_START:
*value = src->segment_start;
break;
case GST_QUERY_SEGMENT_END:
*value = src->segment_end;
break;
default:
return FALSE;
}
return TRUE;
}
static const GstEventMask *
gst_fakesrc_get_event_mask (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, GST_SEEK_FLAG_FLUSH},
{GST_EVENT_SEEK_SEGMENT, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_SEGMENT_LOOP},
{GST_EVENT_FLUSH, 0},
{0, 0},
};
return masks;
}
static gboolean
gst_fakesrc_event_handler (GstPad * pad, GstEvent * event)
{
GstFakeSrc *src;
src = GST_FAKESRC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
src->buffer_count = GST_EVENT_SEEK_OFFSET (event);
if (!GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH) {
break;
}
/* else we do a flush too */
case GST_EVENT_SEEK_SEGMENT:
src->segment_start = GST_EVENT_SEEK_OFFSET (event);
src->segment_end = GST_EVENT_SEEK_ENDOFFSET (event);
src->buffer_count = src->segment_start;
src->segment_loop =
GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
break;
case GST_EVENT_FLUSH:
src->need_flush = TRUE;
break;
default:
break;
}
gst_event_unref (event);
return TRUE;
}
static void
gst_fakesrc_update_functions (GstFakeSrc * src)
{
GList *pads;
if (src->loop_based) {
gst_element_set_loop_function (GST_ELEMENT (src),
GST_DEBUG_FUNCPTR (gst_fakesrc_loop));
} else {
gst_element_set_loop_function (GST_ELEMENT (src), NULL);
}
pads = GST_ELEMENT (src)->pads;
while (pads) {
GstPad *pad = GST_PAD (pads->data);
if (src->loop_based) {
gst_pad_set_get_function (pad, NULL);
} else {
gst_pad_set_get_function (pad, GST_DEBUG_FUNCPTR (gst_fakesrc_get));
}
gst_pad_set_event_function (pad, gst_fakesrc_event_handler);
gst_pad_set_event_mask_function (pad, gst_fakesrc_get_event_mask);
gst_pad_set_query_function (pad, gst_fakesrc_query);
gst_pad_set_query_type_function (pad, gst_fakesrc_get_query_types);
gst_pad_set_formats_function (pad, gst_fakesrc_get_formats);
pads = g_list_next (pads);
}
}
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;
/* it's not null if we got it, but it might not be ours */
src = GST_FAKESRC (object);
switch (prop_id) {
case ARG_LOOP_BASED:
src->loop_based = g_value_get_boolean (value);
gst_fakesrc_update_functions (src);
break;
case ARG_OUTPUT:
g_warning ("not yet implemented");
break;
case ARG_DATA:
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 ARG_SIZETYPE:
src->sizetype = g_value_get_enum (value);
break;
case ARG_SIZEMIN:
src->sizemin = g_value_get_int (value);
break;
case ARG_SIZEMAX:
src->sizemax = g_value_get_int (value);
break;
case ARG_PARENTSIZE:
src->parentsize = g_value_get_int (value);
break;
case ARG_FILLTYPE:
src->filltype = g_value_get_enum (value);
break;
case ARG_PATTERN:
break;
case ARG_NUM_BUFFERS:
src->num_buffers = g_value_get_int (value);
break;
case ARG_EOS:
src->eos = g_value_get_boolean (value);
GST_INFO ("will EOS on next buffer");
break;
case ARG_SILENT:
src->silent = g_value_get_boolean (value);
break;
case ARG_SIGNAL_HANDOFFS:
src->signal_handoffs = g_value_get_boolean (value);
break;
case ARG_DUMP:
src->dump = 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 ARG_NUM_SOURCES:
g_value_set_int (value, GST_ELEMENT (src)->numsrcpads);
break;
case ARG_LOOP_BASED:
g_value_set_boolean (value, src->loop_based);
break;
case ARG_OUTPUT:
g_value_set_enum (value, src->output);
break;
case ARG_DATA:
g_value_set_enum (value, src->data);
break;
case ARG_SIZETYPE:
g_value_set_enum (value, src->sizetype);
break;
case ARG_SIZEMIN:
g_value_set_int (value, src->sizemin);
break;
case ARG_SIZEMAX:
g_value_set_int (value, src->sizemax);
break;
case ARG_PARENTSIZE:
g_value_set_int (value, src->parentsize);
break;
case ARG_FILLTYPE:
g_value_set_enum (value, src->filltype);
break;
case ARG_PATTERN:
g_value_set_string (value, src->pattern);
break;
case ARG_NUM_BUFFERS:
g_value_set_int (value, src->num_buffers);
break;
case ARG_EOS:
g_value_set_boolean (value, src->eos);
break;
case ARG_SILENT:
g_value_set_boolean (value, src->silent);
break;
case ARG_SIGNAL_HANDOFFS:
g_value_set_boolean (value, src->signal_handoffs);
break;
case ARG_DUMP:
g_value_set_boolean (value, src->dump);
break;
case ARG_LAST_MESSAGE:
g_value_set_string (value, src->last_message);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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 GstData *
gst_fakesrc_get (GstPad * pad)
{
GstFakeSrc *src;
GstBuffer *buf;
g_return_val_if_fail (pad != NULL, NULL);
src = GST_FAKESRC (GST_OBJECT_PARENT (pad));
g_return_val_if_fail (GST_IS_FAKESRC (src), NULL);
if (src->need_flush) {
src->need_flush = FALSE;
return GST_DATA (gst_event_new (GST_EVENT_FLUSH));
}
if (src->buffer_count == src->segment_end) {
if (src->segment_loop) {
return GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE));
} else {
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
}
if (src->rt_num_buffers == 0) {
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
} else {
if (src->rt_num_buffers > 0)
src->rt_num_buffers--;
}
if (src->eos) {
GST_INFO ("fakesrc is setting eos on pad");
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
buf = gst_fakesrc_create_buffer (src);
GST_BUFFER_TIMESTAMP (buf) = src->buffer_count++;
if (!src->silent) {
g_free (src->last_message);
src->last_message =
g_strdup_printf ("get ******* (%s:%s)> (%d bytes, %"
G_GUINT64_FORMAT " ) %p", GST_DEBUG_PAD_NAME (pad),
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, pad);
GST_LOG_OBJECT (src, "post handoff emit");
}
return GST_DATA (buf);
}
/**
* gst_fakesrc_loop:
* @element: the faksesrc to loop
*
* generate an empty buffer and push it to the next element.
*/
static void
gst_fakesrc_loop (GstElement * element)
{
GstFakeSrc *src;
const GList *pads;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_FAKESRC (element));
src = GST_FAKESRC (element);
pads = gst_element_get_pad_list (element);
while (pads) {
GstPad *pad = GST_PAD (pads->data);
GstData *data;
data = gst_fakesrc_get (pad);
gst_pad_push (pad, data);
if (src->eos) {
return;
}
pads = g_list_next (pads);
}
}
static GstElementStateReturn
gst_fakesrc_change_state (GstElement * element)
{
GstFakeSrc *fakesrc;
g_return_val_if_fail (GST_IS_FAKESRC (element), GST_STATE_FAILURE);
fakesrc = GST_FAKESRC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
fakesrc->buffer_count = 0;
fakesrc->pattern_byte = 0x00;
fakesrc->need_flush = FALSE;
fakesrc->eos = FALSE;
fakesrc->rt_num_buffers = fakesrc->num_buffers;
break;
case GST_STATE_PAUSED_TO_PLAYING:
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
if (fakesrc->parent) {
gst_buffer_unref (fakesrc->parent);
fakesrc->parent = NULL;
}
g_free (fakesrc->last_message);
fakesrc->last_message = NULL;
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
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