gstreamer/gst/passthrough/gstpassthrough.c

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/* -*- c-basic-offset: 2 -*-
* GStreamer
* Copyright (C) 1999-2001 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include "gstpassthrough.h"
#define PASSTHRU_BUF_SIZE 4096
#define PASSTHRU_NUM_BUFS 4
/* elementfactory information */
static GstElementDetails passthrough_details = {
"Passthrough",
"Filter/Effect/Audio",
"Transparent filter for audio/raw (boilerplate for effects)",
"Thomas <thomas@apestaart.org>, " "Andy Wingo <apwingo@eos.ncsu.edu>"
};
enum
{
/* FILL ME */
LAST_SIGNAL
};
/* static guint gst_filter_signals[LAST_SIGNAL] = { 0 }; */
enum
{
ARG_0,
ARG_SILENT
};
static GstStaticPadTemplate passthrough_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS)
);
static GstStaticPadTemplate passthrough_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS)
);
static void passthrough_class_init (GstPassthroughClass * klass);
static void passthrough_base_init (GstPassthroughClass * klass);
static void passthrough_init (GstPassthrough * filter);
static void passthrough_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void passthrough_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstPadLinkReturn passthrough_connect_sink (GstPad * pad,
const GstCaps * caps);
static void passthrough_chain (GstPad * pad, GstData * _data);
static void inline passthrough_fast_float_chain (gfloat * data,
guint numsamples);
static void inline passthrough_fast_16bit_chain (gint16 * data,
guint numsamples);
static void inline passthrough_fast_8bit_chain (gint8 * data, guint numsamples);
static GstElementClass *parent_class = NULL;
static GstPadLinkReturn
passthrough_connect_sink (GstPad * pad, const GstCaps * caps)
{
const gchar *mimetype;
GstPassthrough *filter;
GstStructure *structure;
g_return_val_if_fail (pad != NULL, GST_PAD_LINK_DELAYED);
g_return_val_if_fail (caps != NULL, GST_PAD_LINK_DELAYED);
filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_IS_PASSTHROUGH (filter), GST_PAD_LINK_REFUSED);
structure = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (structure);
gst_structure_get_int (structure, "rate", &filter->rate);
gst_structure_get_int (structure, "channels", &filter->channels);
gst_structure_get_int (structure, "width", &filter->width);
gst_structure_get_int (structure, "endianness", &filter->endianness);
if (strcmp (mimetype, "audio/x-raw-int") == 0) {
filter->format = GST_PASSTHROUGH_FORMAT_INT;
gst_structure_get_int (structure, "depth", &filter->depth);
gst_structure_get_boolean (structure, "signed", &filter->is_signed);
if (!filter->silent) {
g_print ("Passthrough : channels %d, rate %d\n", filter->channels,
filter->rate);
g_print
("Passthrough : format int, bit width %d, endianness %d, signed %s\n",
filter->width, filter->endianness, filter->is_signed ? "yes" : "no");
}
} else if (strcmp (mimetype, "audio/x-raw-float") == 0) {
filter->format = GST_PASSTHROUGH_FORMAT_FLOAT;
if (!filter->silent) {
g_print ("Passthrough : channels %d, rate %d\n", filter->channels,
filter->rate);
g_print ("Passthrough : format float, width %d\n", filter->width);
}
}
return gst_pad_try_set_caps (filter->srcpad, caps);
}
GType
gst_passthrough_get_type (void)
{
static GType passthrough_type = 0;
if (!passthrough_type) {
static const GTypeInfo passthrough_info = {
sizeof (GstPassthroughClass),
(GBaseInitFunc) passthrough_base_init,
NULL,
(GClassInitFunc) passthrough_class_init,
NULL,
NULL,
sizeof (GstPassthrough),
0,
(GInstanceInitFunc) passthrough_init,
};
passthrough_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstPassthrough",
&passthrough_info, 0);
}
return passthrough_type;
}
static void
passthrough_base_init (GstPassthroughClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&passthrough_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&passthrough_sink_template));
gst_element_class_set_details (element_class, &passthrough_details);
}
static void
passthrough_class_init (GstPassthroughClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT, g_param_spec_boolean ("silent", "silent", "silent", TRUE, G_PARAM_READWRITE)); /* CHECKME */
gobject_class->set_property = passthrough_set_property;
gobject_class->get_property = passthrough_get_property;
}
static void
passthrough_init (GstPassthrough * filter)
{
filter->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&passthrough_src_template), "src");
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
filter->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&passthrough_sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
gst_pad_set_link_function (filter->sinkpad, passthrough_connect_sink);
gst_pad_set_chain_function (filter->sinkpad, passthrough_chain);
filter->silent = FALSE;
}
static void
passthrough_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstPassthrough *filter;
gint16 *int_data;
gfloat *float_data;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
g_return_if_fail (filter != NULL);
g_return_if_fail (GST_IS_PASSTHROUGH (filter));
switch (filter->format) {
case GST_PASSTHROUGH_FORMAT_INT:
int_data = (gint16 *) GST_BUFFER_DATA (buf);
switch (filter->width) {
case 16:
passthrough_fast_16bit_chain (int_data, GST_BUFFER_SIZE (buf) / 2);
break;
case 8:
passthrough_fast_8bit_chain ((gint8 *) int_data,
GST_BUFFER_SIZE (buf));
break;
}
break;
case GST_PASSTHROUGH_FORMAT_FLOAT:
float_data = (gfloat *) GST_BUFFER_DATA (buf);
passthrough_fast_float_chain (float_data,
GST_BUFFER_SIZE (buf) / sizeof (gfloat));
break;
}
gst_pad_push (filter->srcpad, GST_DATA (buf));
}
static void inline
passthrough_fast_float_chain (gfloat * data, guint num_samples)
#include "filter.func"
static void inline
passthrough_fast_16bit_chain (gint16 * data, guint num_samples)
#include "filter.func"
static void inline
passthrough_fast_8bit_chain (gint8 * data, guint num_samples)
#include "filter.func"
static void
passthrough_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPassthrough *filter;
g_return_if_fail (GST_IS_PASSTHROUGH (object));
filter = GST_PASSTHROUGH (object);
switch (prop_id) {
case ARG_SILENT:
filter->silent = g_value_get_boolean (value);
break;
default:
break;
}
}
static void
passthrough_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstPassthrough *filter;
g_return_if_fail (GST_IS_PASSTHROUGH (object));
filter = GST_PASSTHROUGH (object);
switch (prop_id) {
case ARG_SILENT:
g_value_set_boolean (value, filter->silent);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "passthrough",
GST_RANK_NONE, GST_TYPE_PASSTHROUGH);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"passthrough",
"Transparent filter for audio/raw (boilerplate for effects)",
plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)