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moving around

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Original commit message from CVS:
moving around
This commit is contained in:
Thomas Vander Stichele 2001-12-23 17:27:58 +00:00
parent 93b782b643
commit 7b61bb6f74
15 changed files with 1772 additions and 823 deletions
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4
libs/Makefile.am
View file

@ -1,3 +1,3 @@
SUBDIRS = riff getbits putbits idct audio bytestream control resample
SUBDIRS = gst
DIST_SUBDIRS = riff getbits putbits audio idct bytestream control resample
DIST_SUBDIRS = gst

15
libs/bytestream/Makefile.am
View file

@ -1,15 +0,0 @@
filterdir = $(libdir)/gst
filter_LTLIBRARIES = libgstbytestream.la libgstbstest.la
libgstbytestream_la_SOURCES = gstbytestream.c
libgstbstest_la_SOURCES = gstbstest.c
libgstbytestreamincludedir = $(includedir)/gst/libs/bytestream
libgstbytestreaminclude_HEADERS = gstbytestream.h
libgstbytestream_la_LIBADD = $(GST_LIBS)
libgstbytestream_la_CFLAGS = $(GST_CFLAGS)
libgstbstest_la_LIBADD = $(GST_LIBS)
libgstbstest_la_CFLAGS = $(GST_CFLAGS)

294
libs/bytestream/gstbstest.c
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@ -1,294 +0,0 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstidentity.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 <gst/gst.h>
#include "gstbytestream.h"
#define GST_TYPE_IDENTITY \
(gst_identity_get_type())
#define GST_IDENTITY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IDENTITY,GstIdentity))
#define GST_IDENTITY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IDENTITY,GstIdentityClass))
#define GST_IS_IDENTITY(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IDENTITY))
#define GST_IS_IDENTITY_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IDENTITY))
typedef struct _GstIdentity GstIdentity;
typedef struct _GstIdentityClass GstIdentityClass;
struct _GstIdentity {
GstElement element;
GstPad *sinkpad;
GstPad *srcpad;
GstByteStream *bs;
gint byte_size;
gint count;
};
struct _GstIdentityClass {
GstElementClass parent_class;
};
GType gst_identity_get_type(void);
GstElementDetails gst_identity_details = {
"ByteStreamTest",
"Filter",
"Test for the GstByteStream code",
VERSION,
"Erik Walthinsen <omega@temple-baptist.com>",
"(C) 2001",
};
/* Identity signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_BYTE_SIZE,
ARG_COUNT,
};
static void gst_identity_class_init (GstIdentityClass *klass);
static void gst_identity_init (GstIdentity *identity);
static void gst_identity_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_identity_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_identity_loop (GstElement *element);
static GstElementClass *parent_class = NULL;
// static guint gst_identity_signals[LAST_SIGNAL] = { 0 };
GType
gst_identity_get_type (void)
{
static GType identity_type = 0;
if (!identity_type) {
static const GTypeInfo identity_info = {
sizeof(GstIdentityClass), NULL,
NULL,
(GClassInitFunc)gst_identity_class_init,
NULL,
NULL,
sizeof(GstIdentity),
0,
(GInstanceInitFunc)gst_identity_init,
};
identity_type = g_type_register_static (GST_TYPE_ELEMENT, "GstBSTest", &identity_info, 0);
}
return identity_type;
}
static void
gst_identity_class_init (GstIdentityClass *klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BYTE_SIZE,
g_param_spec_uint ("byte_size", "byte_size", "byte_size",
0, G_MAXUINT, 0, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_COUNT,
g_param_spec_uint ("count", "count", "count",
0, G_MAXUINT, 0, G_PARAM_READWRITE));
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_identity_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_identity_get_property);
}
static GstPadNegotiateReturn
gst_identity_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstIdentity *identity;
identity = GST_IDENTITY (gst_pad_get_parent (pad));
return gst_pad_negotiate_proxy (pad, identity->sinkpad, caps);
}
static GstPadNegotiateReturn
gst_identity_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstIdentity *identity;
identity = GST_IDENTITY (gst_pad_get_parent (pad));
return gst_pad_negotiate_proxy (pad, identity->srcpad, caps);
}
static void
gst_identity_init (GstIdentity *identity)
{
identity->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (identity), identity->sinkpad);
gst_pad_set_negotiate_function (identity->sinkpad, gst_identity_negotiate_sink);
identity->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (identity), identity->srcpad);
gst_pad_set_negotiate_function (identity->srcpad, gst_identity_negotiate_src);
gst_element_set_loop_function (GST_ELEMENT (identity), gst_identity_loop);
identity->byte_size = 384;
identity->count = 5;
identity->bs = gst_bytestream_new(identity->sinkpad);
}
static void
gst_identity_loop (GstElement *element)
{
GstIdentity *identity;
GstBuffer *buf;
int i;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_IDENTITY (element));
identity = GST_IDENTITY (element);
/* THIS IS THE BUFFER BASED ONE
do {
// g_print("\n");
for (i=0;i<identity->count;i++) {
// g_print("bstest: getting a buffer of %d bytes\n",identity->byte_size);
buf = gst_bytestream_read(identity->bs,identity->byte_size);
if (!buf) g_print("BUFFER IS BOGUS\n");
// g_print("pushing the buffer, %d bytes at %d\n",GST_BUFFER_SIZE(buf),GST_BUFFER_OFFSET(buf));
gst_pad_push(identity->srcpad,buf);
// g_print("\n");
gst_bytestream_print_status(identity->bs);
// g_print("\n\n");
}
exit(1);
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
*/
/* THIS IS THE BYTE BASED ONE*/
do {
for (i=0;i<identity->count;i++) {
buf = gst_buffer_new();
// note that this is dangerous, as it does *NOT* refcount the data, it can go away!!!
GST_BUFFER_DATA(buf) = gst_bytestream_peek_bytes(identity->bs,identity->byte_size);
GST_BUFFER_SIZE(buf) = identity->byte_size;
GST_BUFFER_FLAG_SET(buf,GST_BUFFER_DONTFREE);
gst_pad_push(identity->srcpad,buf);
gst_bytestream_flush(identity->bs,identity->byte_size);
}
exit(1);
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
/**/
}
static void
gst_identity_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstIdentity *identity;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_IDENTITY (object));
identity = GST_IDENTITY (object);
switch (prop_id) {
case ARG_BYTE_SIZE:
identity->byte_size = g_value_get_uint (value);
break;
case ARG_COUNT:
identity->count = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void gst_identity_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) {
GstIdentity *identity;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_IDENTITY (object));
identity = GST_IDENTITY (object);
switch (prop_id) {
case ARG_BYTE_SIZE:
g_value_set_uint (value, identity->byte_size);
break;
case ARG_COUNT:
g_value_set_uint (value, identity->count);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
// we need gstbytestream
if (!gst_library_load ("gstbytestream")) {
g_print("can't load bytestream\n");
return FALSE;
}
/* We need to create an ElementFactory for each element we provide.
* This consists of the name of the element, the GType identifier,
* and a pointer to the details structure at the top of the file.
*/
factory = gst_elementfactory_new("gstbstest", GST_TYPE_IDENTITY, &gst_identity_details);
g_return_val_if_fail(factory != NULL, FALSE);
/* The very last thing is to register the elementfactory with the plugin. */
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"gstbstest",
plugin_init
};

455
libs/bytestream/gstbytestream.c
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@ -1,455 +0,0 @@
/* GStreamer
* Copyright (C) 2001 Erik Walthinsen <omega@temple-baptist.com>
*
* gstbytestream.c: adds a convenient bytestream based API to a pad.
*
* 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 <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <gst/gstinfo.h>
#include "gstbytestream.h"
//#define BS_DEBUG
#ifdef BS_DEBUG
# define bs_print(format,args...) GST_DEBUG (GST_CAT_BUFFER, format, ## args)
# define bs_status(bs) gst_bytestream_print_status(bs)
#else
# define bs_print(format,args...)
# define bs_status(bs)
#endif
guint8 *gst_bytestream_assemble (GstByteStream * bs, guint32 len);
/**
* gst_bytestream_new:
* @pad: the pad to attach the bytestream to
*
* creates a bytestream from the given pad
*
* Returns: a new #GstByteStream object
*/
GstByteStream *
gst_bytestream_new (GstPad * pad)
{
GstByteStream *bs = g_new (GstByteStream, 1);
bs->pad = pad;
bs->event = NULL;
bs->buflist = NULL;
bs->headbufavail = 0;
bs->listavail = 0;
bs->assembled = NULL;
return bs;
}
void
gst_bytestream_destroy (GstByteStream * bs)
{
GSList *walk;
if (bs->event)
gst_event_free (bs->event);
walk = bs->buflist;
while (walk) {
gst_buffer_unref (GST_BUFFER (walk->data));
walk = g_slist_next (walk);
}
g_slist_free (bs->buflist);
if (bs->assembled)
g_free (bs->assembled);
g_free (bs);
}
// HOW THIS WORKS:
//
// The fundamental structure is a singly-linked list of buffers. The
// buffer on the front is the oldest, and thus the first to read data
// from. The number of bytes left to be read in this buffer is stored
// in bs->headbufavail. The number of bytes available in the entire
// list (including the head buffer) is in bs->listavail.
//
// When a request is made for data (peek), _fill_bytes is called with
// the number of bytes needed, but only if the listavail indicates
// that there aren't already enough. This calls _get_next_buf until
// the listavail is sufficient to satisfy the demand.
//
// _get_next_buf pulls a buffer from the pad the bytestream is attached
// to, and shoves it in the list. There are actually two things it can
// do. If there's already a buffer in the list, and the _is_span_fast()
// test returns true, it will merge it with that last buffer. Otherwise
// it will simply tack it onto the end of the list.
//
// The _peek itself first checks the simple case of the request fitting
// within the head buffer, and if so creates a subbuffer and returns.
// Otherwise, it creates a new buffer and allocates space for the request
// and calls _assemble to fill it. We know we have to copy because this
// case only happens when the _merge wasn't feasible during _get_next_buf.
//
// The _flush method repeatedly inspects the head buffer and flushes as
// much data from it as it needs to, up to the size of the buffer. If
// the flush decimates the buffer, it's stripped, unref'd, and removed.
// get the next buffer
// if the buffer can be merged with the head buffer, do so
// else add it onto the head of the
static gboolean
gst_bytestream_get_next_buf (GstByteStream * bs)
{
GstBuffer *nextbuf, *lastbuf;
GSList *end;
g_assert (!bs->event);
bs_print ("get_next_buf: pulling buffer\n");
nextbuf = gst_pad_pull (bs->pad);
if (GST_IS_EVENT (nextbuf))
{
bs->event = GST_EVENT (nextbuf);
return FALSE;
}
if (!nextbuf)
return FALSE;
bs_print ("get_next_buf: got buffer of %d bytes\n", GST_BUFFER_SIZE (nextbuf));
// first see if there are any buffers in the list at all
if (bs->buflist) {
bs_print ("gst_next_buf: there is at least one buffer in the list\n");
// now find the end of the list
end = g_slist_last (bs->buflist);
// get the buffer that's there
lastbuf = GST_BUFFER (end->data);
// see if we can marge cheaply
if (gst_buffer_is_span_fast (lastbuf, nextbuf)) {
bs_print ("get_next_buf: merging new buffer with last buf on list\n");
// it is, let's merge them (this is really an append, but...)
end->data = gst_buffer_merge (lastbuf, nextbuf);
// add to the length of the list
bs->listavail += GST_BUFFER_SIZE (nextbuf);
// have to check to see if we merged with the head buffer
if (end == bs->buflist) {
bs->headbufavail += GST_BUFFER_SIZE (nextbuf);
}
gst_buffer_unref (lastbuf);
gst_buffer_unref (nextbuf);
// if we can't, we just append this buffer
}
else {
bs_print ("get_next_buf: adding new buffer to the end of the list\n");
end = g_slist_append (end, nextbuf);
// also need to increment length of list and buffer count
bs->listavail += GST_BUFFER_SIZE (nextbuf);
}
// if there are no buffers in the list
}
else {
bs_print ("get_next_buf: buflist is empty, adding new buffer to list\n");
// put this on the end of the list
bs->buflist = g_slist_append (bs->buflist, nextbuf);
// and increment the number of bytes in the list
bs->listavail = GST_BUFFER_SIZE (nextbuf);
// set the head buffer avail to the size
bs->headbufavail = GST_BUFFER_SIZE (nextbuf);
}
return TRUE;
}
static gboolean
gst_bytestream_fill_bytes (GstByteStream * bs, guint32 len)
{
// as long as we don't have enough, we get more buffers
while (bs->listavail < len) {
bs_print ("fill_bytes: there are %d bytes in the list, we need %d\n", bs->listavail, len);
if (!gst_bytestream_get_next_buf (bs))
return FALSE;
}
return TRUE;
}
GstBuffer *
gst_bytestream_peek (GstByteStream * bs, guint32 len)
{
GstBuffer *headbuf, *retbuf = NULL;
g_return_val_if_fail (bs != NULL, NULL);
g_return_val_if_fail (len > 0, NULL);
bs_print ("peek: asking for %d bytes\n", len);
// make sure we have enough
bs_print ("peek: there are %d bytes in the list\n", bs->listavail);
if (len > bs->listavail) {
if (!gst_bytestream_fill_bytes (bs, len))
return NULL;
bs_print ("peek: there are now %d bytes in the list\n", bs->listavail);
}
bs_status (bs);
// extract the head buffer
headbuf = GST_BUFFER (bs->buflist->data);
// if the requested bytes are in the current buffer
bs_print ("peek: headbufavail is %d\n", bs->headbufavail);
if (len <= bs->headbufavail) {
bs_print ("peek: there are enough bytes in headbuf (need %d, have %d)\n", len, bs->headbufavail);
// create a sub-buffer of the headbuf
retbuf = gst_buffer_create_sub (headbuf, GST_BUFFER_SIZE (headbuf) - bs->headbufavail, len);
// otherwise we need to figure out how to assemble one
}
else {
bs_print ("peek: current buffer is not big enough for len %d\n", len);
retbuf = gst_buffer_new ();
GST_BUFFER_SIZE (retbuf) = len;
GST_BUFFER_DATA (retbuf) = gst_bytestream_assemble (bs, len);
if (GST_BUFFER_OFFSET (headbuf) != -1)
GST_BUFFER_OFFSET (retbuf) = GST_BUFFER_OFFSET (headbuf) + (GST_BUFFER_SIZE (headbuf) - bs->headbufavail);
}
return retbuf;
}
guint8 *
gst_bytestream_peek_bytes (GstByteStream * bs, guint32 len)
{
GstBuffer *headbuf;
guint8 *data = NULL;
g_return_val_if_fail (bs != NULL, NULL);
g_return_val_if_fail (len > 0, NULL);
bs_print ("peek_bytes: asking for %d bytes\n", len);
if (bs->assembled) {
g_free (bs->assembled);
bs->assembled = NULL;
}
// make sure we have enough
bs_print ("peek_bytes: there are %d bytes in the list\n", bs->listavail);
if (len > bs->listavail) {
if (!gst_bytestream_fill_bytes (bs, len))
return NULL;
bs_print ("peek_bytes: there are now %d bytes in the list\n", bs->listavail);
}
bs_status (bs);
// extract the head buffer
headbuf = GST_BUFFER (bs->buflist->data);
// if the requested bytes are in the current buffer
bs_print ("peek_bytes: headbufavail is %d\n", bs->headbufavail);
if (len <= bs->headbufavail) {
bs_print ("peek_bytes: there are enough bytes in headbuf (need %d, have %d)\n", len, bs->headbufavail);
// create a sub-buffer of the headbuf
data = GST_BUFFER_DATA (headbuf) + (GST_BUFFER_SIZE (headbuf) - bs->headbufavail);
// otherwise we need to figure out how to assemble one
}
else {
bs_print ("peek_bytes: current buffer is not big enough for len %d\n", len);
data = gst_bytestream_assemble (bs, len);
bs->assembled = data;
bs->assembled_len = len;
}
return data;
}
guint8 *
gst_bytestream_assemble (GstByteStream * bs, guint32 len)
{
guint8 *data = g_malloc (len);
GSList *walk;
guint32 copied = 0;
GstBuffer *buf;
// copy the data from the curbuf
buf = GST_BUFFER (bs->buflist->data);
bs_print ("assemble: copying %d bytes from curbuf at %d to *data\n", bs->headbufavail,
GST_BUFFER_SIZE (buf) - bs->headbufavail);
memcpy (data, GST_BUFFER_DATA (buf) + GST_BUFFER_SIZE (buf) - bs->headbufavail, bs->headbufavail);
copied += bs->headbufavail;
// asumption is made that the buffers all exist in the list
walk = g_slist_next (bs->buflist);
while (copied < len) {
buf = GST_BUFFER (walk->data);
if (GST_BUFFER_SIZE (buf) < (len - copied)) {
bs_print ("assemble: copying %d bytes from buf to output offset %d\n", GST_BUFFER_SIZE (buf), copied);
memcpy (data + copied, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
copied += GST_BUFFER_SIZE (buf);
}
else {
bs_print ("assemble: copying %d bytes from buf to output offset %d\n", len - copied, copied);
memcpy (data + copied, GST_BUFFER_DATA (buf), len - copied);
copied = len;
}
walk = g_slist_next (walk);
}
return data;
}
gboolean
gst_bytestream_flush (GstByteStream * bs, guint32 len)
{
bs_print ("flush: flushing %d bytes\n", len);
// make sure we have enough
bs_print ("flush: there are %d bytes in the list\n", bs->listavail);
if (len > bs->listavail) {
if (!gst_bytestream_fill_bytes (bs, len))
return FALSE;
bs_print ("flush: there are now %d bytes in the list\n", bs->listavail);
}
gst_bytestream_flush_fast (bs, len);
return TRUE;
}
void
gst_bytestream_flush_fast (GstByteStream * bs, guint32 len)
{
GstBuffer *headbuf;
g_assert (len <= bs->listavail);
if (bs->assembled) {
g_free (bs->assembled);
bs->assembled = NULL;
}
// repeat until we've flushed enough data
while (len > 0) {
headbuf = GST_BUFFER (bs->buflist->data);
bs_print ("flush: analyzing buffer that's %d bytes long, offset %d\n", GST_BUFFER_SIZE (headbuf),
GST_BUFFER_OFFSET (headbuf));
// if there's enough to complete the flush
if (bs->headbufavail > len) {
// just trim it off
bs_print ("flush: trimming %d bytes off end of headbuf\n", len);
bs->headbufavail -= len;
bs->listavail -= len;
len = 0;
// otherwise we have to trim the whole buffer
}
else {
bs_print ("flush: removing head buffer completely\n");
// remove it from the list
bs->buflist = g_slist_delete_link (bs->buflist, bs->buflist);
// trim it from the avail size
bs->listavail -= bs->headbufavail;
// record that we've trimmed this many bytes
len -= bs->headbufavail;
// unref it
gst_buffer_unref (headbuf);
// record the new headbufavail
if (bs->buflist) {
bs->headbufavail = GST_BUFFER_SIZE (GST_BUFFER (bs->buflist->data));
bs_print ("flush: next headbuf is %d bytes\n", bs->headbufavail);
}
else {
bs_print ("flush: no more bytes at all\n");
}
}
bs_print ("flush: bottom of while(), len is now %d\n", len);
}
}
GstBuffer *
gst_bytestream_read (GstByteStream * bs, guint32 len)
{
GstBuffer *buf = gst_bytestream_peek (bs, len);
if (!buf)
return NULL;
gst_bytestream_flush_fast (bs, len);
return buf;
}
/**
* gst_bytestream_get_status
* @bs: a bytestream
* @avail_out: total number of bytes buffered
* @event_out: an event
*
* When an event occurs, the bytestream will return NULL. You must
* retrieve the event using this API before reading more bytes from
* the stream.
*
* It is possible for the bytestream to return NULL due to running
* out of buffers, however, this indicates a bug because an EOS
* event should have been sent.
*/
void
gst_bytestream_get_status (GstByteStream *bs,
guint32 *avail_out,
GstEvent **event_out)
{
if (avail_out)
*avail_out = bs->listavail;
if (event_out)
{
*event_out = bs->event;
bs->event = NULL;
}
}
void
gst_bytestream_print_status (GstByteStream * bs)
{
GSList *walk;
GstBuffer *buf;
bs_print ("STATUS: head buffer has %d bytes available\n", bs->headbufavail);
bs_print ("STATUS: list has %d bytes available\n", bs->listavail);
walk = bs->buflist;
while (walk) {
buf = GST_BUFFER (walk->data);
walk = g_slist_next (walk);
bs_print ("STATUS: buffer starts at %d and is %d bytes long\n", GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
}
}

57
libs/bytestream/gstbytestream.h
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@ -1,57 +0,0 @@
/* GStreamer
* Copyright (C) 2001 Erik Walthinsen <omega@temple-baptist.com>
*
* 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.
*/
#ifndef __GST_BYTESTREAM_H__
#define __GST_BYTESTREAM_H__
#include <gst/gstpad.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _GstByteStream GstByteStream;
struct _GstByteStream {
GstPad *pad;
GstEvent * event;
GSList *buflist;
guint32 headbufavail;
guint32 listavail;
// we keep state of assembled pieces
guint8 *assembled;
guint32 assembled_len;
};
GstByteStream* gst_bytestream_new (GstPad *pad);
void gst_bytestream_destroy (GstByteStream *bs);
GstBuffer* gst_bytestream_read (GstByteStream *bs, guint32 len);
GstBuffer* gst_bytestream_peek (GstByteStream *bs, guint32 len);
guint8* gst_bytestream_peek_bytes (GstByteStream *bs, guint32 len);
gboolean gst_bytestream_flush (GstByteStream *bs, guint32 len);
void gst_bytestream_flush_fast (GstByteStream * bs, guint32 len);
void gst_bytestream_get_status (GstByteStream *bs, guint32 *avail_out, GstEvent **event_out);
void gst_bytestream_print_status (GstByteStream *bs);
#endif /* __GST_BYTESTREAM_H__ */

22
libs/gst/control/Makefile.am Normal file
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libdir = $(libdir)/gst
lib_LTLIBRARIES = libgstcontrol.la
libgstcontrol_la_SOURCES = \
control.c \
dparammanager.c \
dparam.c \
dplinearinterp.c
libgstcontrolincludedir = $(includedir)/gst/control
libgstcontrolinclude_HEADERS = \
control.h \
dparammanager.h \
dparam.h \
dparamcommon.h \
plinearinterp.h
libgstcontrol_la_LIBADD = $(GST_LIBS)
libgstcontrol_la_CFLAGS = $(GST_CFLAGS) -finline-functions -ffast-math

27
libs/gst/control/control.c Normal file
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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstcontrol.c: GStreamer control utility library
*
* 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 <gst/control/control.h>
void
gst_control_init (int *argc, char **argv[]) {
_gst_dpman_initialize ();
}

39
libs/gst/control/control.h Normal file
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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstcontrol.h: GStreamer control utility library
*
* 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.
*/
#ifndef __GST_CONTROL_H__
#define __GST_CONTROL_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include <gst/control/dparammanager.h>
#include <gst/control/dparam.h>
#include <gst/control/dplinearinterp.h>
void gst_control_init (int *argc, char **argv[]);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_CONTROL_H__ */

408
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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdparam.c: Dynamic Parameter functionality
*
* 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 <math.h>
#include <string.h>
#include <gst/gstinfo.h>
#include <gst/control/dparam.h>
#include <gst/control/dparammanager.h>
static void gst_dparam_class_init (GstDParamClass *klass);
static void gst_dparam_init (GstDParam *dparam);
static void gst_dparam_dispose (GObject *object);
static void gst_dparam_do_update_realtime (GstDParam *dparam, gint64 timestamp);
static GValue** gst_dparam_get_point_realtime (GstDParam *dparam, gint64 timestamp);
GType
gst_dparam_get_type(void) {
static GType dparam_type = 0;
if (!dparam_type) {
static const GTypeInfo dparam_info = {
sizeof(GstDParamClass),
NULL,
NULL,
(GClassInitFunc)gst_dparam_class_init,
NULL,
NULL,
sizeof(GstDParam),
0,
(GInstanceInitFunc)gst_dparam_init,
};
dparam_type = g_type_register_static(GST_TYPE_OBJECT, "GstDParam", &dparam_info, 0);
}
return dparam_type;
}
static void
gst_dparam_class_init (GstDParamClass *klass)
{
GObjectClass *gobject_class;
GstDParamClass *dparam_class;
GstObjectClass *gstobject_class;
gobject_class = (GObjectClass*)klass;
dparam_class = (GstDParamClass*)klass;
gstobject_class = (GstObjectClass*) klass;
gobject_class->dispose = gst_dparam_dispose;
//gstobject_class->save_thyself = gst_dparam_save_thyself;
}
static void
gst_dparam_init (GstDParam *dparam)
{
g_return_if_fail (dparam != NULL);
GST_DPARAM_VALUE(dparam) = NULL;
GST_DPARAM_TYPE(dparam) = 0;
GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam)=0LL;
GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam)=0LL;
GST_DPARAM_READY_FOR_UPDATE(dparam)=FALSE;
dparam->lock = g_mutex_new ();
}
/**
* gst_dparam_new:
* @type: the type that this dparam will store
*
* Returns: a new instance of GstDParam
*/
GstDParam*
gst_dparam_new (GType type)
{
GstDParam *dparam;
dparam = g_object_new (gst_dparam_get_type (), NULL);
dparam->do_update_func = gst_dparam_do_update_realtime;
dparam->get_point_func = gst_dparam_get_point_realtime;
dparam->point = gst_dparam_new_value_array(type, 0);
GST_DPARAM_TYPE(dparam) = type;
return dparam;
}
static void
gst_dparam_dispose (GObject *object)
{
GstDParam *dparam = GST_DPARAM(object);
GValue **point = dparam->point;
guint i = 0;
gchar *dparam_name = g_strdup(GST_DPARAM_NAME(dparam));
g_print("disposing of %s\n", dparam_name);
if (GST_DPARAM_MANAGER(dparam)){
gst_dpman_detach_dparam(GST_DPARAM_MANAGER(dparam), dparam_name);
}
point = dparam->point;
while (point[i]){
g_value_unset(point[i]);
g_free(point[i]);
i++;
}
g_free(dparam_name);
}
/**
* gst_dparam_attach
* @dparam: GstDParam instance
* @manager: the GstDParamManager that this dparam belongs to
*
*/
void
gst_dparam_attach (GstDParam *dparam, GstDParamManager *manager, GValue *value, GstDParamSpec *spec)
{
g_return_if_fail (dparam != NULL);
g_return_if_fail (GST_IS_DPARAM (dparam));
g_return_if_fail (manager != NULL);
g_return_if_fail (GST_IS_DPMAN (manager));
g_return_if_fail (value != NULL);
g_return_if_fail (spec != NULL);
g_return_if_fail (GST_DPARAM_TYPE(dparam) == G_VALUE_TYPE(value));
GST_DPARAM_NAME(dparam) = spec->dparam_name;
GST_DPARAM_VALUE(dparam) = value;
GST_DPARAM_SPEC(dparam) = spec;
GST_DPARAM_MANAGER(dparam) = manager;
}
/**
* gst_dparam_detach
* @dparam: GstDParam instance
* @manager: the GstDParamManager that this dparam belongs to
*
*/
void
gst_dparam_detach (GstDParam *dparam)
{
g_return_if_fail (dparam != NULL);
g_return_if_fail (GST_IS_DPARAM (dparam));
GST_DPARAM_NAME(dparam) = NULL;
GST_DPARAM_VALUE(dparam) = NULL;
GST_DPARAM_SPEC(dparam) = NULL;
GST_DPARAM_MANAGER(dparam) = NULL;
}
/**
* gst_dparam_new_value_array
* @type: the type of the first GValue in the array
* @...: the type of other GValues in the array
*
* The list of types should be terminated with a 0.
* If the type of a value is not yet known then use G_TYPE_NONE .
*
* Returns: an newly created array of GValues
*/
GValue**
gst_dparam_new_value_array(GType type, ...)
{
GValue **point;
GValue *value;
guint x;
guint values_length = 0;
va_list var_args;
GType each_type;
va_start (var_args, type);
each_type = type;
while (each_type){
values_length++;
each_type = va_arg (var_args, GType);
}
va_end (var_args);
point = g_new0(GValue*,values_length + 1);
va_start (var_args, type);
each_type = type;
for (x=0 ; x < values_length ; x++){
value = g_new0(GValue,1);
if (each_type != G_TYPE_NONE){
g_value_init(value, each_type);
}
point[x] = value;
each_type = va_arg (var_args, GType);
}
point[values_length] = NULL;
va_end (var_args);
GST_DEBUG(GST_CAT_PARAMS, "array with %d values created\n", values_length);
return point;
}
void
gst_dparam_set_value_from_string(GValue *value, const gchar *value_str)
{
g_return_if_fail(value != NULL);
g_return_if_fail(value_str != NULL);
GST_DEBUG(GST_CAT_PARAMS, "parsing '%s' to type %s\n", value_str, g_type_name(G_VALUE_TYPE(value)));
switch (G_VALUE_TYPE(value)) {
case G_TYPE_STRING:
g_value_set_string(value, g_strdup(value_str));
break;
case G_TYPE_ENUM:
case G_TYPE_INT: {
gint i;
sscanf (value_str, "%d", &i);
g_value_set_int(value, i);
break;
}
case G_TYPE_UINT: {
guint i;
sscanf (value_str, "%u", &i);
g_value_set_uint(value, i);
break;
}
case G_TYPE_LONG: {
glong i;
sscanf (value_str, "%ld", &i);
g_value_set_long(value, i);
break;
}
case G_TYPE_ULONG: {
gulong i;
sscanf (value_str, "%lu", &i);
g_value_set_ulong(value, i);
break;
}
case G_TYPE_BOOLEAN: {
gboolean i = FALSE;
if (!strncmp ("true", value_str, 4)) i = TRUE;
g_value_set_boolean(value, i);
break;
}
case G_TYPE_CHAR: {
gchar i;
sscanf (value_str, "%c", &i);
g_value_set_char(value, i);
break;
}
case G_TYPE_UCHAR: {
guchar i;
sscanf (value_str, "%c", &i);
g_value_set_uchar(value, i);
break;
}
case G_TYPE_FLOAT: {
gfloat i;
sscanf (value_str, "%f", &i);
g_value_set_float(value, i);
break;
}
case G_TYPE_DOUBLE: {
gfloat i;
sscanf (value_str, "%g", &i);
g_value_set_double(value, (gdouble)i);
break;
}
default:
break;
}
}
static void
gst_dparam_do_update_realtime (GstDParam *dparam, gint64 timestamp)
{
GST_DPARAM_LOCK(dparam);
GST_DPARAM_READY_FOR_UPDATE(dparam) = FALSE;
GST_DEBUG(GST_CAT_PARAMS, "updating value for %s(%p)\n",GST_DPARAM_NAME (dparam),dparam);
g_value_copy(dparam->point[0], GST_DPARAM_VALUE(dparam));
GST_DPARAM_UNLOCK(dparam);
}
static GValue**
gst_dparam_get_point_realtime (GstDParam *dparam, gint64 timestamp)
{
GST_DEBUG(GST_CAT_PARAMS, "getting point for %s(%p)\n",GST_DPARAM_NAME (dparam),dparam);
return dparam->point;
}
/**********************
* GstDParamSmooth
**********************/
static void gst_dparam_do_update_smooth (GstDParam *dparam, gint64 timestamp);
static GValue** gst_dparam_get_point_smooth (GstDParam *dparam, gint64 timestamp);
/**
* gst_dparam_smooth_new:
* @type: the type that this dparam will store
*
* Returns: a new instance of GstDParamSmooth
*/
GstDParam*
gst_dparam_smooth_new (GType type)
{
GstDParam *dparam;
dparam = g_object_new (gst_dparam_get_type (), NULL);
dparam->do_update_func = gst_dparam_do_update_smooth;
dparam->get_point_func = gst_dparam_get_point_smooth;
dparam->point = gst_dparam_new_value_array(type, type, G_TYPE_FLOAT, 0);
GST_DPARAM_TYPE(dparam) = type;
return dparam;
}
static void
gst_dparam_do_update_smooth (GstDParam *dparam, gint64 timestamp)
{
gint64 time_diff;
gfloat time_ratio;
time_diff = MIN(GST_DPARAM_DEFAULT_UPDATE_PERIOD(dparam),
timestamp - GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam));
time_ratio = (gfloat)time_diff / g_value_get_float(dparam->point[2]);
GST_DPARAM_LOCK(dparam);
GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) = GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam);
while(GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) <= timestamp){
GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) += GST_DPARAM_DEFAULT_UPDATE_PERIOD(dparam);
}
GST_DEBUG(GST_CAT_PARAMS, "last:%lld current:%lld next:%lld\n",
GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam), timestamp, GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam));
switch (G_VALUE_TYPE(GST_DPARAM_VALUE(dparam))){
case G_TYPE_FLOAT: {
gfloat current, target, max_change, current_diff, final_val;
target = g_value_get_float(dparam->point[0]);
current = g_value_get_float(GST_DPARAM_VALUE(dparam));
max_change = time_ratio * g_value_get_float(dparam->point[1]);
GST_DEBUG(GST_CAT_PARAMS, "target:%f current:%f max_change:%f \n",
target, current, max_change);
if (dparam->spec->is_log){
gfloat current_log;
current_log = log(current);
current_diff = ABS(current_log - log(target));
if (current_diff > max_change)
final_val = (target < current) ? exp(current_log-max_change) : exp(current_log+max_change);
else
final_val = target;
}
else {
current_diff = ABS (current - target);
if (current_diff > max_change)
final_val = (target < current) ? current-max_change : current+max_change;
else
final_val = target;
}
GST_DPARAM_READY_FOR_UPDATE(dparam) = (current_diff > max_change);
g_value_set_float(GST_DPARAM_VALUE(dparam), final_val);
break;
}
default:
break;
}
//GST_DEBUG(GST_CAT_PARAMS, "smooth update for %s(%p): %f\n",
// GST_DPARAM_NAME (dparam),dparam, g_value_get_float(GST_DPARAM_VALUE(dparam)));
GST_DPARAM_UNLOCK(dparam);
}
static GValue**
gst_dparam_get_point_smooth (GstDParam *dparam, gint64 timestamp)
{
GST_DEBUG(GST_CAT_PARAMS, "getting point for %s(%p)\n",GST_DPARAM_NAME (dparam),dparam);
return dparam->point;
}

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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdparam.h: Dynamic Parameter functionality
*
* 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.
*/
#ifndef __GST_DPARAM_H__
#define __GST_DPARAM_H__
#include <gst/gstobject.h>
#include <gst/gstprops.h>
#include <gst/control/dparamcommon.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_DPARAM (gst_dparam_get_type ())
#define GST_DPARAM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DPARAM,GstDParam))
#define GST_DPARAM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DPARAM,GstDParam))
#define GST_IS_DPARAM(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DPARAM))
#define GST_IS_DPARAM_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DPARAM))
#define GST_DPARAM_NAME(dparam) (GST_OBJECT_NAME(dparam))
#define GST_DPARAM_PARENT(dparam) (GST_OBJECT_PARENT(dparam))
#define GST_DPARAM_VALUE(dparam) ((dparam)->value)
#define GST_DPARAM_SPEC(dparam) ((dparam)->spec)
#define GST_DPARAM_MANAGER(dparam) ((dparam)->manager)
#define GST_DPARAM_TYPE(dparam) ((dparam)->type)
#define GST_DPARAM_LOCK(dparam) (g_mutex_lock((dparam)->lock))
#define GST_DPARAM_UNLOCK(dparam) (g_mutex_unlock((dparam)->lock))
#define GST_DPARAM_READY_FOR_UPDATE(dparam) ((dparam)->ready_for_update)
#define GST_DPARAM_DEFAULT_UPDATE_PERIOD(dparam) ((dparam)->default_update_period)
#define GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) ((dparam)->next_update_timestamp)
#define GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) ((dparam)->last_update_timestamp)
#define GST_DPARAM_GET_POINT(dparam, timestamp) \
((dparam->get_point_func)(dparam, timestamp))
#define GST_DPARAM_FIND_POINT(dparam, timestamp, search_flag) \
((dparam->find_point_func)(dparam, data, search_flag))
#define GST_DPARAM_DO_UPDATE(dparam, timestamp) \
((dparam->do_update_func)(dparam, timestamp))
#define GST_DPARAM_INSERT_POINT(dparam, timestamp) \
((dparam->insert_point_func)(dparam, timestamp))
#define GST_DPARAM_REMOVE_POINT(dparam, data) \
((dparam->remove_point_func)(dparam, data))
typedef enum {
GST_DPARAM_CLOSEST,
GST_DPARAM_CLOSEST_AFTER,
GST_DPARAM_CLOSEST_BEFORE,
GST_DPARAM_EXACT,
} GstDParamSearchFlag;
typedef enum {
GST_DPARAM_NOT_FOUND = 0,
GST_DPARAM_FOUND_EXACT,
GST_DPARAM_FOUND_CLOSEST,
} GstDParamSearchResult;
typedef struct _GstDParamClass GstDParamClass;
typedef GValue** (*GstDParamInsertPointFunction) (GstDParam *dparam, guint64 timestamp);
typedef void (*GstDParamRemovePointFunction) (GstDParam *dparam, GValue** point);
typedef GValue** (*GstDParamGetPointFunction) (GstDParam *dparam, gint64 timestamp);
typedef GstDParamSearchResult (*GstDParamFindPointFunction) (GstDParam *dparam, gint64 *timestamp, GstDParamSearchFlag search_flag);
typedef void (*GstDParamDoUpdateFunction) (GstDParam *dparam, gint64 timestamp);
struct _GstDParam {
GstObject object;
GstDParamGetPointFunction get_point_func;
GstDParamFindPointFunction find_point_func;
GstDParamDoUpdateFunction do_update_func;
GstDParamInsertPointFunction insert_point_func;
GstDParamRemovePointFunction remove_point_func;
GMutex *lock;
GValue *value;
GstDParamManager *manager;
GstDParamSpec *spec;
GValue **point;
GType type;
gint64 last_update_timestamp;
gint64 next_update_timestamp;
gint64 default_update_period;
gboolean ready_for_update;
};
struct _GstDParamClass {
GstObjectClass parent_class;
/* signal callbacks */
};
struct _GstDParamSpec {
gchar *dparam_name;
gchar *unit_name;
GValue *min_val;
GValue *max_val;
GValue *default_val;
gboolean is_log;
gboolean is_rate;
};
GType gst_dparam_get_type (void);
GstDParam* gst_dparam_new (GType type);
void gst_dparam_attach (GstDParam *dparam, GstDParamManager *manager, GValue *value, GstDParamSpec *spec);
void gst_dparam_detach (GstDParam *dparam);
GValue** gst_dparam_new_value_array(GType type, ...);
void gst_dparam_set_value_from_string(GValue *value, const gchar *value_str);
/**********************
* GstDParamSmooth
**********************/
GstDParam* gst_dparam_smooth_new (GType type);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_DPARAM_H__ */

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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdparamcommon.h: Dynamic Parameter common header
*
* 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.
*/
#ifndef __GST_DPCOMMON_H__
#define __GST_DPCOMMON_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _GstDParam GstDParam;
typedef struct _GstDParamSpec GstDParamSpec;
typedef struct _GstDParamManager GstDParamManager;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_DPCOMMON_H__ */

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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdparammanager.c: Dynamic Parameter group functionality
*
* 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 <gst/control/dparammanager.h>
#include <gst/gstelement.h>
#include <gst/gstinfo.h>
static GHashTable *_element_registry;
static void gst_dpman_class_init (GstDParamManagerClass *klass);
static void gst_dpman_init (GstDParamManager *dpman);
static void gst_dpman_dispose (GObject *object);
static GstDParamWrapper* gst_dpman_new_wrapper(GstDParamManager *dpman, gchar *dparam_name, GType type, GstDPMUpdateMethod update_method);
static GstDParamWrapper* gst_dpman_get_wrapper(GstDParamManager *dpman, gchar *dparam_name);
static void gst_dpman_state_change (GstElement *element, gint state, GstDParamManager *dpman);
static void gst_dpman_caps_changed (GstPad *pad, GstCaps *caps, GstDParamManager *dpman);
static guint gst_dpman_preprocess_synchronous(GstDParamManager *dpman, guint frames, gint64 timestamp);
static guint gst_dpman_preprocess_noop(GstDParamManager *dpman, guint frames, gint64 timestamp);
static guint gst_dpman_process_noop(GstDParamManager *dpman, guint frame_count);
static GObjectClass *parent_class;
void
_gst_dpman_initialize()
{
}
GType
gst_dpman_get_type (void)
{
static GType dpman_type = 0;
if (!dpman_type) {
static const GTypeInfo dpman_info = {
sizeof(GstDParamManagerClass),
NULL,
NULL,
(GClassInitFunc)gst_dpman_class_init,
NULL,
NULL,
sizeof(GstDParamManager),
0,
(GInstanceInitFunc)gst_dpman_init,
};
dpman_type = g_type_register_static(GST_TYPE_OBJECT, "GstDParamManager", &dpman_info, 0);
}
return dpman_type;
}
static void
gst_dpman_class_init (GstDParamManagerClass *klass)
{
GstObjectClass *gstobject_class;
GObjectClass *gobject_class;
parent_class = g_type_class_peek_parent (klass);
gstobject_class = (GstObjectClass*) klass;
gobject_class = (GObjectClass*) klass;
gobject_class->dispose = gst_dpman_dispose;
klass->modes = g_hash_table_new(g_str_hash,g_str_equal);
gst_dpman_register_mode (klass, "synchronous",
gst_dpman_preprocess_synchronous, gst_dpman_process_noop, NULL, NULL);
gst_dpman_register_mode (klass, "asynchronous",
gst_dpman_preprocess_noop, gst_dpman_process_noop, NULL, NULL);
gst_dpman_register_mode (klass, "disabled",
gst_dpman_preprocess_noop, gst_dpman_process_noop, NULL, NULL);
_element_registry = g_hash_table_new(NULL,NULL);
}
static void
gst_dpman_init (GstDParamManager *dpman)
{
GST_DPMAN_DPARAMS(dpman) = g_hash_table_new(g_str_hash,g_str_equal);
GST_DPMAN_DPARAMS_LIST(dpman) = NULL;
GST_DPMAN_NAME(dpman) = NULL;
GST_DPMAN_PARENT(dpman) = NULL;
GST_DPMAN_MODE_NAME(dpman) = NULL;
GST_DPMAN_MODE(dpman) = NULL;
GST_DPMAN_MODE_DATA(dpman) = NULL;
GST_DPMAN_RATE(dpman) = 0;
}
/**
* gst_dpman_new:
* @name: name of the GstDParamManager instance
* @parent: element which created this instance
*
* Returns: a new instance of GstDParamManager
*/
GstDParamManager*
gst_dpman_new (gchar *name, GstElement *parent)
{
GstDParamManager *dpman;
g_return_val_if_fail (name != NULL, NULL);
dpman = g_object_new (gst_dpman_get_type (), NULL);
gst_object_set_name (GST_OBJECT (dpman), name);
gst_dpman_set_parent(dpman, parent);
gst_dpman_set_mode(dpman, "disabled");
return dpman;
}
static void
gst_dpman_dispose (GObject *object)
{
/* GstDParamManager *dpman = GST_DPMAN(object); */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/**
* gst_dpman_add_required_dparam_callback:
* @dpman: GstDParamManager instance
* @dparam_name: a parameter name unique to this GstDParamManager
* @type: the GValue type that this parameter will store
* @update_func: callback to update the element with the new value
* @update_data: will be included in the call to update_func
*
* Returns: true if it was successfully added
*/
gboolean
gst_dpman_add_required_dparam_callback (GstDParamManager *dpman,
gchar *dparam_name,
GType type,
GstDPMUpdateFunction update_func,
gpointer update_data)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (update_func != NULL, FALSE);
dpwrap = gst_dpman_new_wrapper(dpman, dparam_name, type, GST_DPMAN_CALLBACK);
g_return_val_if_fail (dpwrap != NULL, FALSE);
GST_DEBUG(GST_CAT_PARAMS,"adding required callback dparam '%s' of type %s\n", dparam_name, g_type_name(type));
dpwrap->update_func = update_func;
dpwrap->update_data = update_data;
return TRUE;
}
/**
* gst_dpman_add_required_dparam_direct:
* @dpman: GstDParamManager instance
* @dparam_name: a parameter name unique to this GstDParamManager
* @type: the GValue type that this parameter will store
* @update_data: pointer to the member to be updated
*
* Returns: true if it was successfully added
*/
gboolean
gst_dpman_add_required_dparam_direct (GstDParamManager *dpman,
gchar *dparam_name,
GType type,
gpointer update_data)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (update_data != NULL, FALSE);
dpwrap = gst_dpman_new_wrapper(dpman, dparam_name, type, GST_DPMAN_DIRECT);
g_return_val_if_fail (dpwrap != NULL, FALSE);
GST_DEBUG(GST_CAT_PARAMS,"adding required direct dparam '%s' of type %s\n", dparam_name, g_type_name(type));
dpwrap->update_data = update_data;
return TRUE;
}
/**
* gst_dpman_add_required_dparam_array:
* @dpman: GstDParamManager instance
* @dparam_name: a parameter name unique to this GstDParamManager
* @type: the GValue type that this parameter will store
* @update_data: pointer to where the array will be stored
*
* Returns: true if it was successfully added
*/
gboolean
gst_dpman_add_required_dparam_array (GstDParamManager *dpman,
gchar *dparam_name,
GType type,
gpointer update_data)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (update_data != NULL, FALSE);
dpwrap = gst_dpman_new_wrapper(dpman, dparam_name, type, GST_DPMAN_ARRAY);
g_return_val_if_fail (dpwrap != NULL, FALSE);
GST_DEBUG(GST_CAT_PARAMS,"adding required array dparam '%s' of type %s\n", dparam_name, g_type_name(type));
dpwrap->update_data = update_data;
return TRUE;
}
/**
* gst_dpman_remove_required_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: the name of an existing parameter
*
*/
void
gst_dpman_remove_required_dparam (GstDParamManager *dpman, gchar *dparam_name)
{
GstDParamWrapper* dpwrap;
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (dparam_name != NULL);
dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
g_return_if_fail(dpwrap != NULL);
g_return_if_fail(dpwrap->dparam == NULL);
GST_DEBUG(GST_CAT_PARAMS, "removing required dparam: %s\n", dparam_name);
g_hash_table_remove(GST_DPMAN_DPARAMS(dpman), dparam_name);
GST_DPMAN_DPARAMS_LIST(dpman) = g_slist_remove(GST_DPMAN_DPARAMS_LIST(dpman), dpwrap);
g_free(dpwrap->value);
g_free(dpwrap);
}
/**
* gst_dpman_attach_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: a name previously added with gst_dpman_add_required_dparam
* @dparam: GstDParam instance to attach
*
* Returns: true if it was successfully attached
*/
gboolean
gst_dpman_attach_dparam (GstDParamManager *dpman, gchar *dparam_name, GstDParam *dparam)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (dparam_name != NULL, FALSE);
g_return_val_if_fail (dparam != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPARAM (dparam), FALSE);
g_return_val_if_fail (dparam != NULL, FALSE);
dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
g_return_val_if_fail(dpwrap != NULL, FALSE);
g_return_val_if_fail(dpwrap->value != NULL, FALSE);
dpwrap->dparam = dparam;
gst_dparam_attach(dparam, dpman, dpwrap->value, dpwrap->spec);
return TRUE;
}
/**
* gst_dpman_detach_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: the name of a parameter with a previously attached GstDParam
*
*/
void
gst_dpman_detach_dparam (GstDParamManager *dpman, gchar *dparam_name)
{
GstDParamWrapper* dpwrap;
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (dparam_name != NULL);
dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
g_return_if_fail(dpwrap);
gst_dparam_detach(dpwrap->dparam);
dpwrap->dparam = NULL;
}
/**
* gst_dpman_get_dparam:
* @dpman: GstDParamManager instance
* @name: the name of an existing dparam instance
*
* Returns: the dparam with the given name - or NULL otherwise
*/
GstDParam *
gst_dpman_get_dparam (GstDParamManager *dpman, gchar *name)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (name != NULL, NULL);
dpwrap = g_hash_table_lookup(GST_DPMAN_DPARAMS(dpman), name);
g_return_val_if_fail (dpwrap != NULL, NULL);
return dpwrap->dparam;
}
/**
* gst_dpman_get_dparam_type:
* @dpman: GstDParamManager instance
* @name: the name of dparam
*
* Returns: the type that this dparam requires/uses
*/
GType
gst_dpman_get_dparam_type (GstDParamManager *dpman, gchar *name)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, 0);
g_return_val_if_fail (GST_IS_DPMAN (dpman), 0);
g_return_val_if_fail (name != NULL, 0);
dpwrap = g_hash_table_lookup(GST_DPMAN_DPARAMS(dpman), name);
g_return_val_if_fail (dpwrap != NULL, 0);
return G_VALUE_TYPE(dpwrap->value);
}
GstDParamSpec**
gst_dpman_list_dparam_specs(GstDParamManager *dpman)
{
GstDParamWrapper* dpwrap;
GSList *dpwraps;
GstDParamSpec** dparam_specs;
guint x = 0;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
dpwraps = GST_DPMAN_DPARAMS_LIST(dpman);
dparam_specs = g_new0(GstDParamSpec*, g_slist_length(dpwraps) + 1);
while (dpwraps){
dpwrap = (GstDParamWrapper*)dpwraps->data;
dparam_specs[x++] = dpwrap->spec;
dpwraps = g_slist_next(dpwraps);
}
return dparam_specs;
}
GstDParamSpec*
gst_dpman_get_dparam_spec (GstDParamManager *dpman, gchar *dparam_name)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (dparam_name != NULL, NULL);
dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
return dpwrap->spec;
}
void
gst_dpman_dparam_spec_has_changed (GstDParamManager *dpman, gchar *dparam_name)
{
}
/**
* gst_dpman_register_mode
* @klass: GstDParamManagerClass class instance
* @modename: the unique name of the new mode
* @preprocessfunc: the function which will be called before each buffer is processed
* @processfunc: the function which may be called throughout the processing of a buffer
* @setupfunc: the function which initialises the mode when activated
* @teardownfunc: the function which frees any resources the mode uses
*
*/
void
gst_dpman_register_mode (GstDParamManagerClass *klass,
gchar *modename,
GstDPMModePreProcessFunction preprocessfunc,
GstDPMModeProcessFunction processfunc,
GstDPMModeSetupFunction setupfunc,
GstDPMModeTeardownFunction teardownfunc)
{
GstDPMMode *mode;
g_return_if_fail (klass != NULL);
g_return_if_fail (modename != NULL);
g_return_if_fail (GST_IS_DPMAN_CLASS (klass));
mode = g_new0(GstDPMMode,1);
mode->preprocessfunc = preprocessfunc;
mode->processfunc = processfunc;
mode->setupfunc = setupfunc;
mode->teardownfunc = teardownfunc;
g_hash_table_insert(klass->modes, modename, mode);
GST_DEBUG(GST_CAT_PARAMS, "mode '%s' registered\n", modename);
}
/**
* gst_dpman_set_mode
* @dpman: GstDParamManager instance
* @modename: the name of the mode to use
*
* Returns: TRUE if the mode was set, FALSE otherwise
*/
gboolean
gst_dpman_set_mode(GstDParamManager *dpman, gchar *modename)
{
GstDPMMode *mode=NULL;
GstDParamManagerClass *oclass;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (modename != NULL, FALSE);
oclass = (GstDParamManagerClass*)(G_OBJECT_GET_CLASS(dpman));
mode = g_hash_table_lookup(oclass->modes, modename);
g_return_val_if_fail (mode != NULL, FALSE);
if (GST_DPMAN_MODE(dpman) == mode) {
GST_DEBUG(GST_CAT_PARAMS, "mode %s already set\n", modename);
return TRUE;
}
GST_DEBUG(GST_CAT_PARAMS, "setting mode to %s\n", modename);
if (GST_DPMAN_MODE(dpman) && GST_DPMAN_TEARDOWNFUNC(dpman)){
GST_DPMAN_TEARDOWNFUNC(dpman)(dpman);
}
GST_DPMAN_MODE(dpman) = mode;
if (GST_DPMAN_SETUPFUNC(dpman)){
GST_DPMAN_SETUPFUNC(dpman)(dpman);
}
return TRUE;
}
/**
* gst_dpman_set_parent
* @dpman: GstDParamManager instance
* @parent: the element that this GstDParamManager belongs to
*
*/
void
gst_dpman_set_parent (GstDParamManager *dpman, GstElement *parent)
{
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (parent != NULL);
g_return_if_fail (GST_IS_ELEMENT (parent));
g_hash_table_insert(_element_registry, parent, dpman);
gst_object_set_parent (GST_OBJECT (dpman), GST_OBJECT(parent));
g_signal_connect(G_OBJECT(parent), "state_change",
G_CALLBACK (gst_dpman_state_change), dpman);
}
/**
* gst_dpman_get_manager
* @parent: the element that the desired GstDParamManager belongs to
*
* Returns: the GstDParamManager which belongs to this element or NULL
* if it doesn't exist
*/
GstDParamManager *
gst_dpman_get_manager (GstElement *parent)
{
GstDParamManager *dpman;
g_return_val_if_fail (parent != NULL, NULL);
g_return_val_if_fail (GST_IS_ELEMENT (parent), NULL);
dpman = (GstDParamManager*)g_hash_table_lookup(_element_registry, parent);
return dpman;
}
/**
* gst_dpman_set_rate_change_pad
* @dpman: GstDParamManager instance
* @pad: the pad which may have a "rate" caps property
*
*/
void
gst_dpman_set_rate_change_pad(GstDParamManager *dpman, GstPad *pad)
{
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_signal_connect(G_OBJECT(pad), "caps_changed",
G_CALLBACK (gst_dpman_caps_changed), dpman);
}
static GstDParamWrapper*
gst_dpman_get_wrapper(GstDParamManager *dpman, gchar *dparam_name)
{
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (dparam_name != NULL, NULL);
return g_hash_table_lookup(GST_DPMAN_DPARAMS(dpman), dparam_name);
}
static GstDParamWrapper*
gst_dpman_new_wrapper(GstDParamManager *dpman, gchar *dparam_name, GType type, GstDPMUpdateMethod update_method)
{
GstDParamWrapper* dpwrap;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (dparam_name != NULL, NULL);
g_return_val_if_fail(gst_dpman_get_wrapper(dpman, dparam_name) == NULL, NULL);
dpwrap = g_new0(GstDParamWrapper,1);
dpwrap->update_method = update_method;
dpwrap->value = g_new0(GValue,1);
g_value_init(dpwrap->value, type);
dpwrap->spec = g_new0(GstDParamSpec,1);
dpwrap->spec->dparam_name = dparam_name;
dpwrap->spec->min_val = g_new0(GValue,1);
dpwrap->spec->max_val = g_new0(GValue,1);
dpwrap->spec->default_val = g_new0(GValue,1);
g_value_init(dpwrap->spec->min_val, type);
g_value_init(dpwrap->spec->max_val, type);
g_value_init(dpwrap->spec->default_val, type);
g_hash_table_insert(GST_DPMAN_DPARAMS(dpman), dparam_name, dpwrap);
GST_DPMAN_DPARAMS_LIST(dpman) = g_slist_append(GST_DPMAN_DPARAMS_LIST(dpman), dpwrap);
return dpwrap;
}
static void
gst_dpman_state_change (GstElement *element, gint state, GstDParamManager *dpman)
{
GSList *dwraps;
GstDParam *dparam;
GstDParamWrapper *dpwrap;
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
if (state == GST_STATE_PLAYING){
GST_DEBUG(GST_CAT_PARAMS, "initialising params\n");
// force all params to be updated
dwraps = GST_DPMAN_DPARAMS_LIST(dpman);
while (dwraps){
dpwrap = (GstDParamWrapper*)dwraps->data;
dparam = dpwrap->dparam;
if (dparam){
GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
if (dparam->spec){
g_value_copy(dparam->spec->default_val, GST_DPARAM_VALUE(dparam));
}
}
dwraps = g_slist_next(dwraps);
}
}
}
static void
gst_dpman_caps_changed (GstPad *pad, GstCaps *caps, GstDParamManager *dpman)
{
g_return_if_fail (caps != NULL);
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
GST_DPMAN_RATE(dpman) = gst_caps_get_int (caps, "rate");
GST_DEBUG(GST_CAT_PARAMS, "got caps change %d\n", GST_DPMAN_RATE(dpman));
}
static guint
gst_dpman_preprocess_synchronous(GstDParamManager *dpman, guint frames, gint64 timestamp)
{
GSList *dwraps;
GstDParam *dparam;
GstDParamWrapper *dpwrap;
guint x;
g_return_val_if_fail (dpman != NULL, frames);
g_return_val_if_fail (GST_IS_DPMAN (dpman), frames);
// now check whether any passive dparams are ready for an update
dwraps = GST_DPMAN_DPARAMS_LIST(dpman);
while (dwraps){
dpwrap = (GstDParamWrapper*)dwraps->data;
dparam = dpwrap->dparam;
if (dparam && (GST_DPARAM_READY_FOR_UPDATE(dparam) &&
(GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) <= timestamp))){
// this will make dpwrap->value contain the latest value.
// now we just need to get it to the element
GST_DPARAM_DO_UPDATE(dparam, timestamp);
switch (dpwrap->update_method) {
// direct method - set the value directly in the struct of the element
case GST_DPMAN_DIRECT:
GST_DEBUG(GST_CAT_PARAMS, "doing direct update\n");
switch (G_VALUE_TYPE(dpwrap->value)){
case G_TYPE_CHAR:
*(gchar*)dpwrap->update_data = g_value_get_char(dpwrap->value);
break;
case G_TYPE_UCHAR:
*(guchar*)dpwrap->update_data = g_value_get_uchar(dpwrap->value);
break;
case G_TYPE_BOOLEAN:
*(gboolean*)dpwrap->update_data = g_value_get_boolean(dpwrap->value);
break;
case G_TYPE_INT:
*(gint*)dpwrap->update_data = g_value_get_int(dpwrap->value);
break;
case G_TYPE_UINT:
*(guint*)dpwrap->update_data = g_value_get_uint(dpwrap->value);
break;
case G_TYPE_LONG:
*(glong*)dpwrap->update_data = g_value_get_long(dpwrap->value);
break;
case G_TYPE_ULONG:
*(gulong*)dpwrap->update_data = g_value_get_ulong(dpwrap->value);
break;
case G_TYPE_FLOAT:
*(gfloat*)dpwrap->update_data = g_value_get_float(dpwrap->value);
break;
case G_TYPE_DOUBLE:
*(gdouble*)dpwrap->update_data = g_value_get_double(dpwrap->value);
break;
case G_TYPE_POINTER:
*(gpointer*)dpwrap->update_data = g_value_get_pointer(dpwrap->value);
break;
default:
break;
}
break;
// callback method - call the element's callback so it can do what it likes
case GST_DPMAN_CALLBACK:
GST_DEBUG(GST_CAT_PARAMS, "doing callback update\n");
GST_DPMAN_DO_UPDATE(dpwrap);
break;
// array method - generate an array of the right size
// with each value being the same (in synchronous update mode)
case GST_DPMAN_ARRAY:
GST_DEBUG(GST_CAT_PARAMS, "doing array update\n");
switch (G_VALUE_TYPE(dpwrap->value)){
case G_TYPE_CHAR:
(gchar*)dpwrap->update_data = g_new(gchar, frames);
*(gchar*)dpwrap->update_data = g_value_get_char(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((gchar*)dpwrap->update_data)[x] = *(gchar*)dpwrap->update_data;
break;
case G_TYPE_UCHAR:
(guchar*)dpwrap->update_data = g_new(guchar, frames);
*(guchar*)dpwrap->update_data = g_value_get_uchar(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((guchar*)dpwrap->update_data)[x] = *(guchar*)dpwrap->update_data;
break;
case G_TYPE_BOOLEAN:
(gboolean*)dpwrap->update_data = g_new(gboolean, frames);
*(gboolean*)dpwrap->update_data = g_value_get_boolean(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((gboolean*)dpwrap->update_data)[x] = *(gboolean*)dpwrap->update_data;
break;
case G_TYPE_INT:
(gint*)dpwrap->update_data = g_new(gint, frames);
*(gint*)dpwrap->update_data = g_value_get_int(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((gint*)dpwrap->update_data)[x] = *(gint*)dpwrap->update_data;
break;
case G_TYPE_UINT:
(guint*)dpwrap->update_data = g_new(guint, frames);
*(guint*)dpwrap->update_data = g_value_get_uint(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((guint*)dpwrap->update_data)[x] = *(guint*)dpwrap->update_data;
break;
case G_TYPE_LONG:
(glong*)dpwrap->update_data = g_new(glong, frames);
*(glong*)dpwrap->update_data = g_value_get_long(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((glong*)dpwrap->update_data)[x] = *(glong*)dpwrap->update_data;
break;
case G_TYPE_ULONG:
(gulong*)dpwrap->update_data = g_new(gulong, frames);
*(gulong*)dpwrap->update_data = g_value_get_ulong(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((gulong*)dpwrap->update_data)[x] = *(gulong*)dpwrap->update_data;
break;
case G_TYPE_FLOAT:
(gfloat*)dpwrap->update_data = g_new(gfloat, frames);
*(gfloat*)dpwrap->update_data = g_value_get_float(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((gfloat*)dpwrap->update_data)[x] = *(gfloat*)dpwrap->update_data;
break;
case G_TYPE_DOUBLE:
(gdouble*)dpwrap->update_data = g_new(gdouble, frames);
*(gdouble*)dpwrap->update_data = g_value_get_double(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((gdouble*)dpwrap->update_data)[x] = *(gdouble*)dpwrap->update_data;
break;
case G_TYPE_POINTER:
(gpointer*)dpwrap->update_data = g_new(gpointer, frames);
*(gpointer*)dpwrap->update_data = g_value_get_pointer(dpwrap->value);
for (x = 1 ; x < frames ; x++)
((gpointer*)dpwrap->update_data)[x] = *(gpointer*)dpwrap->update_data;
break;
default:
break;
}
break;
default:
break;
}
}
dwraps = g_slist_next(dwraps);
}
return frames;
}
static guint
gst_dpman_preprocess_noop(GstDParamManager *dpman, guint frames, gint64 timestamp)
{
return frames;
}
static guint
gst_dpman_process_noop(GstDParamManager *dpman, guint frame_count)
{
return 0;
}

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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdparammanager.h: Dynamic Parameter group functionality
*
* 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.
*/
#ifndef __GST_DPMAN_H__
#define __GST_DPMAN_H__
#include <gst/gstobject.h>
#include <gst/gstprops.h>
#include <gst/control/dparamcommon.h>
#include <gst/control/dparam.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_DPMAN (gst_dpman_get_type ())
#define GST_DPMAN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DPMAN,GstDParamManager))
#define GST_DPMAN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DPMAN,GstDParamManager))
#define GST_IS_DPMAN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DPMAN))
#define GST_IS_DPMAN_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DPMAN))
#define GST_DPMAN_NAME(dpman) (GST_OBJECT_NAME(dpman))
#define GST_DPMAN_PARENT(dpman) (GST_OBJECT_PARENT(dpman))
#define GST_DPMAN_DPARAMS(dpman) ((dpman)->dparams)
#define GST_DPMAN_DPARAMS_LIST(dpman) ((dpman)->dparams_list)
#define GST_DPMAN_MODE_NAME(dpman) ((dpman)->mode_name)
#define GST_DPMAN_MODE(dpman) ((dpman)->mode)
#define GST_DPMAN_MODE_DATA(dpman) ((dpman)->mode_data)
#define GST_DPMAN_RATE(dpman) ((dpman)->rate)
typedef enum {
GST_DPMAN_CALLBACK,
GST_DPMAN_DIRECT,
GST_DPMAN_ARRAY,
} GstDPMUpdateMethod;
typedef struct _GstDParamManagerClass GstDParamManagerClass;
typedef struct _GstDPMMode GstDPMMode;
typedef struct _GstDParamWrapper GstDParamWrapper;
typedef guint (*GstDPMModePreProcessFunction) (GstDParamManager *dpman, guint frames, gint64 timestamp);
typedef guint (*GstDPMModeProcessFunction) (GstDParamManager *dpman, guint frame_count);
typedef void (*GstDPMModeSetupFunction) (GstDParamManager *dpman);
typedef void (*GstDPMModeTeardownFunction) (GstDParamManager *dpman);
typedef void (*GstDPMUpdateFunction) (GValue *value, gpointer data);
struct _GstDParamManager {
GstObject object;
GHashTable *dparams;
GSList *dparams_list;
gchar *mode_name;
GstDPMMode* mode;
gpointer mode_data;
gint64 timestamp;
guint rate;
};
struct _GstDParamManagerClass {
GstObjectClass parent_class;
GHashTable *modes;
/* signal callbacks */
};
struct _GstDPMMode {
GstDPMModePreProcessFunction preprocessfunc;
GstDPMModeProcessFunction processfunc;
GstDPMModeSetupFunction setupfunc;
GstDPMModeTeardownFunction teardownfunc;
};
struct _GstDParamWrapper {
GstDParamSpec* spec;
GValue *value;
GstDParam *dparam;
GstDPMUpdateMethod update_method;
gpointer update_data;
GstDPMUpdateFunction update_func;
};
#define GST_DPMAN_PREPROCESSFUNC(dpman) (((dpman)->mode)->preprocessfunc)
#define GST_DPMAN_PROCESSFUNC(dpman) (((dpman)->mode)->processfunc)
#define GST_DPMAN_SETUPFUNC(dpman) (((dpman)->mode)->setupfunc)
#define GST_DPMAN_TEARDOWNFUNC(dpman) (((dpman)->mode)->teardownfunc)
#define GST_DPMAN_PREPROCESS(dpman, buffer_size, timestamp) \
(GST_DPMAN_PREPROCESSFUNC(dpman)(dpman, buffer_size, timestamp))
#define GST_DPMAN_PROCESS(dpman, frame_count) \
(GST_DPMAN_PROCESSFUNC(dpman)(dpman, frame_count))
#define GST_DPMAN_PROCESS_COUNTDOWN(dpman, frame_countdown, frame_count) \
(frame_countdown-- || \
(frame_countdown = GST_DPMAN_PROCESS(dpman, frame_count)))
#define GST_DPMAN_DO_UPDATE(dpwrap) ((dpwrap->update_func)(dpwrap->value, dpwrap->update_data))
void _gst_dpman_initialize();
GType gst_dpman_get_type (void);
GstDParamManager* gst_dpman_new (gchar *name, GstElement *parent);
void gst_dpman_set_parent (GstDParamManager *dpman, GstElement *parent);
GstDParamManager* gst_dpman_get_manager (GstElement *parent);
gboolean gst_dpman_add_required_dparam_callback (GstDParamManager *dpman,
gchar *dparam_name,
GType type,
GstDPMUpdateFunction update_func,
gpointer update_data);
gboolean gst_dpman_add_required_dparam_direct (GstDParamManager *dpman,
gchar *dparam_name,
GType type,
gpointer update_data);
gboolean gst_dpman_add_required_dparam_array (GstDParamManager *dpman,
gchar *dparam_name,
GType type,
gpointer update_data);
void gst_dpman_remove_required_dparam (GstDParamManager *dpman, gchar *dparam_name);
gboolean gst_dpman_attach_dparam (GstDParamManager *dpman, gchar *dparam_name, GstDParam *dparam);
void gst_dpman_detach_dparam (GstDParamManager *dpman, gchar *dparam_name);
GstDParam* gst_dpman_get_dparam(GstDParamManager *dpman, gchar *name);
GType gst_dpman_get_dparam_type (GstDParamManager *dpman, gchar *name);
GstDParamSpec** gst_dpman_list_dparam_specs(GstDParamManager *dpman);
GstDParamSpec* gst_dpman_get_dparam_spec (GstDParamManager *dpman, gchar *dparam_name);
void gst_dpman_dparam_spec_has_changed (GstDParamManager *dpman, gchar *dparam_name);
void gst_dpman_set_rate_change_pad(GstDParamManager *dpman, GstPad *pad);
gboolean gst_dpman_set_mode(GstDParamManager *dpman, gchar *modename);
void gst_dpman_register_mode (GstDParamManagerClass *klass,
gchar *modename,
GstDPMModePreProcessFunction preprocessfunc,
GstDPMModeProcessFunction processfunc,
GstDPMModeSetupFunction setupfunc,
GstDPMModeTeardownFunction teardownfunc);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_DPMAN_H__ */

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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdplinearinterp.c: linear interpolation dynamic parameter
*
* 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 <gst/control/dplinearinterp.h>
static void gst_dp_linint_class_init (GstDParamClass *klass);
static void gst_dp_linint_base_class_init (GstDParamClass *klass);
static void gst_dp_linint_init (GstDParam *dp_linint);
GType
gst_dp_linint_get_type(void) {
static GType dp_linint_type = 0;
if (!dp_linint_type) {
static const GTypeInfo dp_linint_info = {
sizeof(GstDParamClass),
(GBaseInitFunc)gst_dp_linint_base_class_init,
NULL,
(GClassInitFunc)gst_dp_linint_class_init,
NULL,
NULL,
sizeof(GstDParam),
0,
(GInstanceInitFunc)gst_dp_linint_init,
};
dp_linint_type = g_type_register_static(GST_TYPE_DPARAM, "GstDParamLinInterp", &dp_linint_info, 0);
}
return dp_linint_type;
}
static void
gst_dp_linint_base_class_init (GstDParamClass *klass)
{
}
static void
gst_dp_linint_class_init (GstDParamClass *klass)
{
}
static void
gst_dp_linint_init (GstDParam *dp_linint)
{
g_return_if_fail (dp_linint != NULL);
}
/**
* gst_dp_linint_new:
* @type: the type that this dp_linint will store
*
* Returns: a new instance of GstDParam
*/
GstDParam*
gst_dp_linint_new (GType type)
{
GstDParam *dparam;
GstDParamLinInterp *dp_linint;
dp_linint = g_object_new (gst_dp_linint_get_type (), NULL);
dparam = GST_DPARAM(dp_linint);
return dparam;
}

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/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdplinearinterp.h: linear interpolation dynamic parameter
*
* 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.
*/
#ifndef __GST_DP_LININT_H__
#define __GST_DP_LININT_H__
#include <gst/gstobject.h>
#include <gst/control/dparam.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_DP_LININT (gst_dp_linint_get_type ())
#define GST_DP_LININT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DP_LININT,GstDParamLinInterp))
#define GST_DP_LININT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DP_LININT,GstDParamLinInterp))
#define GST_IS_DP_LININT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DP_LININT))
#define GST_IS_DP_LININT_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DP_LININT))
typedef struct _GstDParamLinInterp GstDParamLinInterp;
typedef struct _GstDParamLinInterpClass GstDParamLinInterpClass;
struct _GstDParamLinInterp {
GstDParam dparam;
};
struct _GstDParamLinInterpClass {
GstDParamClass parent_class;
/* signal callbacks */
};
GType gst_dp_linint_get_type (void);
GstDParam* gst_dp_linint_new (GType type);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_DP_LININT_H__ */