gstreamer/gst/auparse/gstauparse.c
David Schleef 322baf19c8 Add buffer length checks to every typefinding function
Original commit message from CVS:
Add buffer length checks to every typefinding function
2003-07-24 08:49:42 +00:00

339 lines
8.7 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* 2001/04/03 - Updated parseau to use caps nego
* Zaheer Merali <zaheer@grid9.net
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <gstauparse.h>
/* elementfactory information */
static GstElementDetails gst_auparse_details = {
".au parser",
"Codec/Parser",
"LGPL",
"Parse an .au file into raw audio",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
static GstCaps*
au_type_find (GstBuffer *buf, gpointer private)
{
GstCaps *new = NULL;
gulong *head = (gulong *) GST_BUFFER_DATA (buf);
if (GST_BUFFER_SIZE (buf) < 4)
return NULL;
if (*head == 0x2e736e64 || *head == 0x646e732e)
new = gst_caps_new ("au_type_find", "audio/au", NULL);
return new;
}
/* typefactory for 'au' */
static GstTypeDefinition audefinition = {
"auparse_audio/au",
"audio/x-au",
".au",
au_type_find,
};
GST_PAD_TEMPLATE_FACTORY (sink_factory_templ,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"auparse_sink",
"audio/x-au",
NULL
)
)
GST_PAD_TEMPLATE_FACTORY (src_factory_templ,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"auparse_src",
"audio/x-raw-int",
"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
"signed", GST_PROPS_LIST(
GST_PROPS_BOOLEAN (FALSE),
GST_PROPS_BOOLEAN (TRUE)
),
"width", GST_PROPS_LIST(
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"depth", GST_PROPS_LIST(
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"rate", GST_PROPS_INT_RANGE (8000,48000),
"channels", GST_PROPS_INT_RANGE (1, 2)
),
GST_CAPS_NEW (
"auparse_src_alaw",
"audio/x-alaw",
"rate", GST_PROPS_INT_RANGE (8000,48000),
"channels", GST_PROPS_INT_RANGE (1, 2)
)
)
/* AuParse signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_auparse_class_init (GstAuParseClass *klass);
static void gst_auparse_init (GstAuParse *auparse);
static void gst_auparse_chain (GstPad *pad,GstBuffer *buf);
static GstElementClass *parent_class = NULL;
/*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_auparse_get_type (void)
{
static GType auparse_type = 0;
if (!auparse_type) {
static const GTypeInfo auparse_info = {
sizeof(GstAuParseClass), NULL,
NULL,
(GClassInitFunc) gst_auparse_class_init,
NULL,
NULL,
sizeof(GstAuParse),
0,
(GInstanceInitFunc) gst_auparse_init,
};
auparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info, 0);
}
return auparse_type;
}
static void
gst_auparse_class_init (GstAuParseClass *klass)
{
GstElementClass *gstelement_class;
gstelement_class = (GstElementClass*) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
}
static void
gst_auparse_init (GstAuParse *auparse)
{
auparse->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (sink_factory_templ), "sink");
gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
auparse->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (src_factory_templ), "src");
gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
auparse->offset = 0;
auparse->size = 0;
auparse->encoding = 0;
auparse->frequency = 0;
auparse->channels = 0;
}
static void
gst_auparse_chain (GstPad *pad, GstBuffer *buf)
{
GstAuParse *auparse;
gchar *data;
glong size;
GstCaps* tempcaps;
gint law, depth;
gboolean sign;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
auparse = GST_AUPARSE (gst_pad_get_parent (pad));
GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
gst_element_get_name (GST_ELEMENT (auparse)));
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
/* if we haven't seen any data yet... */
if (auparse->size == 0) {
GstBuffer *newbuf;
guint32 *head = (guint32 *)data;
/* normal format is big endian (au is a Sparc format) */
if (GUINT32_FROM_BE (*head) == 0x2e736e64) {
head++;
auparse->le = 0;
auparse->offset = GUINT32_FROM_BE (*head);
head++;
auparse->size = GUINT32_FROM_BE (*head);
head++;
auparse->encoding = GUINT32_FROM_BE (*head);
head++;
auparse->frequency = GUINT32_FROM_BE (*head);
head++;
auparse->channels = GUINT32_FROM_BE (*head);
head++;
/* and of course, someone had to invent a little endian
* version. Used by DEC systems. */
} else if (GUINT32_FROM_LE (*head) == 0x0064732E) {
auparse->le = 1;
head++;
auparse->le = 0;
auparse->offset = GUINT32_FROM_LE (*head);
head++;
auparse->size = GUINT32_FROM_LE (*head);
head++;
auparse->encoding = GUINT32_FROM_LE (*head);
head++;
auparse->frequency = GUINT32_FROM_LE (*head);
head++;
auparse->channels = GUINT32_FROM_LE (*head);
head++;
} else {
g_warning ("help, dunno what I'm looking at!\n");
gst_buffer_unref(buf);
return;
}
g_print ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
auparse->offset,auparse->size,auparse->encoding,
auparse->frequency,auparse->channels);
GST_DEBUG ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
auparse->offset,auparse->size,auparse->encoding,
auparse->frequency,auparse->channels);
switch (auparse->encoding) {
case 1:
law = 1;
depth = 8;
sign = FALSE;
break;
case 2:
law = 0;
depth = 8;
sign = FALSE;
break;
case 3:
law = 0;
depth = 16;
sign = TRUE;
break;
default:
g_warning ("help!, dont know how to deal with this format yet\n");
return;
}
if (law) {
tempcaps = GST_CAPS_NEW ("auparse_src",
"audio/x-alaw",
"rate", GST_PROPS_INT (auparse->frequency),
"channels", GST_PROPS_INT (auparse->channels));
} else {
tempcaps = GST_CAPS_NEW ("auparse_src",
"audio/x-raw-int",
"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
"rate", GST_PROPS_INT (auparse->frequency),
"channels", GST_PROPS_INT (auparse->channels),
"depth", GST_PROPS_INT (depth),
"width", GST_PROPS_INT (depth),
"signed", GST_PROPS_BOOLEAN (sign));
}
if (gst_pad_try_set_caps (auparse->srcpad, tempcaps) <= 0) {
gst_buffer_unref (buf);
gst_element_error (GST_ELEMENT (auparse), "could not set audio caps");
return;
}
newbuf = gst_buffer_new ();
GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size-(auparse->offset));
memcpy (GST_BUFFER_DATA (newbuf), data+24, size-(auparse->offset));
GST_BUFFER_SIZE (newbuf) = size-(auparse->offset);
gst_buffer_unref (buf);
gst_pad_push (auparse->srcpad, newbuf);
return;
}
gst_pad_push (auparse->srcpad, buf);
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
GstTypeFactory *type;
/* create the plugin structure */
/* create an elementfactory for the auparse element and list it */
factory = gst_element_factory_new ("auparse", GST_TYPE_AUPARSE,
&gst_auparse_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_SECONDARY);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_factory_templ));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_factory_templ));
type = gst_type_factory_new (&audefinition);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"auparse",
plugin_init
};