gstreamer/gst/speed/gstspeed.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 <math.h>
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include "gstspeed.h"
/* buffer size to make if no bufferpool is available, must be divisible by
* sizeof(gfloat) */
#define SPEED_BUFSIZE 4096
/* number of buffers to allocate per chunk in sink buffer pool */
#define SPEED_NUMBUF 6
/* elementfactory information */
static GstElementDetails speed_details = GST_ELEMENT_DETAILS ("Speed",
"Filter/Effect/Audio",
"Set speed/pitch on audio/raw streams (resampler)",
"Andy Wingo <apwingo@eos.ncsu.edu>");
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_SPEED
};
static GstStaticPadTemplate gst_speed_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 gst_speed_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 speed_base_init (gpointer g_class);
static void speed_class_init (GstSpeedClass * klass);
static void speed_init (GstSpeed * filter);
static void speed_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void speed_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec);
static gboolean speed_parse_caps (GstSpeed * filter, const GstCaps * caps);
static void speed_loop (GstElement * element);
static GstElementClass *parent_class = NULL;
/*static guint gst_filter_signals[LAST_SIGNAL] = { 0 }; */
static GstPadLinkReturn
speed_link (GstPad * pad, const GstCaps * caps)
{
GstSpeed *filter;
GstPad *otherpad;
filter = GST_SPEED (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_IS_SPEED (filter), GST_PAD_LINK_REFUSED);
otherpad = (pad == filter->srcpad ? filter->sinkpad : filter->srcpad);
if (!speed_parse_caps (filter, caps))
return GST_PAD_LINK_REFUSED;
return gst_pad_try_set_caps (otherpad, caps);
}
static gboolean
speed_parse_caps (GstSpeed * filter, const GstCaps * caps)
{
const gchar *mimetype;
GstStructure *structure;
gboolean ret;
g_return_val_if_fail (filter != NULL, FALSE);
g_return_val_if_fail (caps != NULL, FALSE);
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "rate", &filter->rate);
ret &= gst_structure_get_int (structure, "channels", &filter->channels);
ret &= gst_structure_get_int (structure, "width", &filter->width);
ret &= gst_structure_get_int (structure, "endianness", &filter->endianness);
filter->buffer_frames = 0;
gst_structure_get_int (structure, "buffer-frames", &filter->buffer_frames);
mimetype = gst_structure_get_name (structure);
if (strcmp (mimetype, "audio/x-raw-int") == 0) {
filter->format = GST_SPEED_FORMAT_INT;
ret &= gst_structure_get_int (structure, "depth", &filter->depth);
ret &= gst_structure_get_boolean (structure, "signed", &filter->is_signed);
} else if (strcmp (mimetype, "audio/x-raw-float") == 0) {
filter->format = GST_SPEED_FORMAT_FLOAT;
} else {
return FALSE;
}
return ret;
}
GType
gst_speed_get_type (void)
{
static GType speed_type = 0;
if (!speed_type) {
static const GTypeInfo speed_info = {
sizeof (GstSpeedClass),
speed_base_init,
NULL,
(GClassInitFunc) speed_class_init,
NULL,
NULL,
sizeof (GstSpeed),
0,
(GInstanceInitFunc) speed_init,
};
speed_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstSpeed", &speed_info, 0);
}
return speed_type;
}
static void
speed_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &speed_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_speed_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_speed_sink_template));
}
static void
speed_class_init (GstSpeedClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->set_property = speed_set_property;
gobject_class->get_property = speed_get_property;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SPEED,
g_param_spec_float ("speed", "speed", "speed",
0.1, 40.0, 1.0, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
}
static void
speed_init (GstSpeed * filter)
{
filter->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_speed_sink_template), "sink");
gst_pad_set_link_function (filter->sinkpad, speed_link);
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
filter->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_speed_src_template), "src");
gst_pad_set_link_function (filter->srcpad, speed_link);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
gst_element_set_loop_function (GST_ELEMENT (filter), speed_loop);
}
static void
speed_loop (GstElement * element)
{
GstSpeed *filter = GST_SPEED (element);
GstBuffer *in, *out;
guint i, j, nin, nout;
gfloat interp, speed, lower, i_float;
g_return_if_fail (filter != NULL);
g_return_if_fail (GST_IS_SPEED (filter));
i = j = 0;
speed = filter->speed;
in = GST_BUFFER (gst_pad_pull (filter->sinkpad));
if (GST_IS_EVENT (in)) {
gst_pad_event_default (filter->sinkpad, GST_EVENT (in));
return;
}
while (GST_IS_EVENT (in)) {
gst_pad_event_default (filter->srcpad, GST_EVENT (in));
in = GST_BUFFER (gst_pad_pull (filter->sinkpad));
}
/* this is a bit nasty, but hey, it's what you've got to do to keep the same
* algorithm and multiple data types in c. */
if (filter->format == GST_SPEED_FORMAT_FLOAT) {
#define _FORMAT gfloat
#include "filter.func"
#undef _FORMAT
} else if (filter->format == GST_SPEED_FORMAT_INT && filter->width == 16) {
#define _FORMAT gint16
#include "filter.func"
#undef _FORMAT
} else if (filter->format == GST_SPEED_FORMAT_INT && filter->width == 8) {
#define _FORMAT gint8
#include "filter.func"
#undef _FORMAT
} else {
GST_ELEMENT_ERROR (filter, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before chain function"));
gst_element_yield (element);
}
}
static void
speed_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstSpeed *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SPEED (object));
filter = GST_SPEED (object);
switch (prop_id) {
case ARG_SPEED:
filter->speed = g_value_get_float (value);
break;
default:
break;
}
}
static void
speed_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstSpeed *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SPEED (object));
filter = GST_SPEED (object);
switch (prop_id) {
case ARG_SPEED:
g_value_set_float (value, filter->speed);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "speed", GST_RANK_NONE, GST_TYPE_SPEED);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"speed",
"Set speed/pitch on audio/raw streams (resampler)",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)