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.
*/
#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
static GstElementDetails passthrough_details = {
"Passthrough",
"Filter/Audio/Effect",
"Transparent filter for audio/raw (boilerplate for effects)",
VERSION,
"Thomas <thomas@apestaart.org>, "\
"Andy Wingo <apwingo@eos.ncsu.edu>",
"(C) 2001",
};
enum {
/* FILL ME */
LAST_SIGNAL
};
/* static guint gst_filter_signals[LAST_SIGNAL] = { 0 }; */
enum {
ARG_0,
ARG_SILENT
};
static GstPadTemplate*
passthrough_sink_factory (void)
{
static GstPadTemplate *template = NULL;
if (! template) {
template = gst_pad_template_new
("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_caps_append (gst_caps_new ("sink_int", "audio/raw",
GST_AUDIO_INT_PAD_TEMPLATE_PROPS),
gst_caps_new ("sink_float", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS)),
NULL);
}
return template;
}
static GstPadTemplate*
passthrough_src_factory (void)
{
static GstPadTemplate *template = NULL;
if (! template)
template = gst_pad_template_new
("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_append (gst_caps_new ("src_float", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS),
gst_caps_new ("src_int", "audio/raw",
GST_AUDIO_INT_PAD_TEMPLATE_PROPS)),
NULL);
return template;
}
static void passthrough_class_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 GstPadConnectReturn passthrough_connect_sink (GstPad *pad, GstCaps *caps);
static void passthrough_chain (GstPad *pad, GstBuffer *buf);
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 GstBufferPool*
passthrough_get_bufferpool (GstPad *pad)
{
GstPassthrough *filter;
filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
return gst_pad_get_bufferpool (filter->srcpad);
}
static GstPadConnectReturn
passthrough_connect_sink (GstPad *pad, GstCaps *caps)
{
const gchar *format;
GstPassthrough *filter;
g_return_val_if_fail (pad != NULL, GST_PAD_CONNECT_DELAYED);
g_return_val_if_fail (caps != NULL, GST_PAD_CONNECT_DELAYED);
filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, GST_PAD_CONNECT_REFUSED);
g_return_val_if_fail (GST_IS_PASSTHROUGH (filter), GST_PAD_CONNECT_REFUSED);
gst_caps_get_string(caps, "format", &format);
gst_caps_get_int (caps, "rate", &filter->rate);
gst_caps_get_int (caps, "channels", &filter->channels);
if (strcmp (format, "int") == 0) {
filter->format = GST_PASSTHROUGH_FORMAT_INT;
gst_caps_get_int (caps, "width", &filter->width);
gst_caps_get_int (caps, "depth", &filter->depth);
gst_caps_get_int (caps, "law", &filter->law);
gst_caps_get_int (caps, "endianness", &filter->endianness);
gst_caps_get_boolean (caps, "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 (format, "float") == 0) {
filter->format = GST_PASSTHROUGH_FORMAT_FLOAT;
gst_caps_get_string (caps, "layout", &filter->layout);
gst_caps_get_float (caps, "intercept", &filter->intercept);
gst_caps_get_float (caps, "slope", &filter->slope);
if (! filter->silent) {
g_print ("Passthrough : channels %d, rate %d\n",
filter->channels, filter->rate);
g_print ("Passthrough : format float, layout %s, intercept %f, slope %f\n",
filter->layout, filter->intercept, filter->slope);
}
}
if (GST_CAPS_IS_FIXED (caps) && ! gst_pad_try_set_caps (filter->srcpad, caps))
return GST_PAD_CONNECT_REFUSED;
return GST_PAD_CONNECT_DELAYED;
}
GType
gst_passthrough_get_type (void)
{
static GType passthrough_type = 0;
if (!passthrough_type) {
static const GTypeInfo passthrough_info = {
sizeof (GstPassthroughClass), NULL,
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_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 (passthrough_src_factory (),"src");
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
filter->sinkpad = gst_pad_new_from_template (passthrough_sink_factory (),"sink");
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
gst_pad_set_connect_function (filter->sinkpad, passthrough_connect_sink);
gst_pad_set_bufferpool_function (filter->sinkpad, passthrough_get_bufferpool);
gst_pad_set_chain_function (filter->sinkpad, passthrough_chain);
filter->silent = FALSE;
}
static void
passthrough_chain (GstPad *pad, GstBuffer *buf)
{
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));
filter->bufpool = gst_pad_get_bufferpool (filter->srcpad);
if (filter->bufpool == NULL) {
filter->bufpool = gst_buffer_pool_get_default (PASSTHRU_BUF_SIZE, PASSTHRU_NUM_BUFS);
}
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, 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 (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new ("passthrough", GST_TYPE_PASSTHROUGH, &passthrough_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, passthrough_src_factory ());
gst_element_factory_add_pad_template (factory, passthrough_sink_factory ());
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"passthrough",
plugin_init
};