mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-25 17:50:36 +00:00
320 lines
8.2 KiB
C
320 lines
8.2 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 = GST_ELEMENT_DETAILS (
|
|
".au parser",
|
|
"Codec/Parser",
|
|
"Parse an .au file into raw audio",
|
|
"Erik Walthinsen <omega@cse.ogi.edu>"
|
|
);
|
|
|
|
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_base_init (gpointer g_class);
|
|
static void gst_auparse_class_init (GstAuParseClass *klass);
|
|
static void gst_auparse_init (GstAuParse *auparse);
|
|
|
|
static void gst_auparse_chain (GstPad *pad,GstData *_data);
|
|
|
|
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),
|
|
gst_auparse_base_init,
|
|
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_base_init (gpointer g_class)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
GST_PAD_TEMPLATE_GET (sink_factory_templ));
|
|
gst_element_class_add_pad_template (element_class,
|
|
GST_PAD_TEMPLATE_GET (src_factory_templ));
|
|
gst_element_class_set_details (element_class, &gst_auparse_details);
|
|
|
|
}
|
|
|
|
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, GstData *_data)
|
|
{
|
|
GstBuffer *buf = GST_BUFFER (_data);
|
|
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, GST_DATA (newbuf));
|
|
return;
|
|
}
|
|
|
|
gst_pad_push (auparse->srcpad, GST_DATA (buf));
|
|
}
|
|
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin *plugin)
|
|
{
|
|
if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
|
|
GST_TYPE_AUPARSE)) {
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (
|
|
GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"auparse",
|
|
"parses au streams",
|
|
plugin_init,
|
|
VERSION,
|
|
"GPL",
|
|
GST_COPYRIGHT,
|
|
GST_PACKAGE,
|
|
GST_ORIGIN
|
|
)
|
|
|