mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-30 12:10:37 +00:00
28530ecdbe
Original commit message from CVS: additions: - bugfixes - 24bit format tests - a new state change test
353 lines
10 KiB
C
353 lines
10 KiB
C
/*
|
|
* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
|
|
*
|
|
* sinesrc.c: An elemnt emitting a sine src in lots of different formats
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU 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
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this library; if not, write to the Free
|
|
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include "sinesrc.h"
|
|
#include <math.h>
|
|
#include <string.h> /* memcpy */
|
|
|
|
#define SAMPLES_PER_WAVE 200
|
|
|
|
GST_PAD_TEMPLATE_FACTORY (sinesrc_src_factory,
|
|
"src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_CAPS_NEW (
|
|
"sinesrc_int_src",
|
|
"audio/raw",
|
|
"format", GST_PROPS_STRING ("int"),
|
|
"law", GST_PROPS_INT (0),
|
|
"endianness", GST_PROPS_LIST (GST_PROPS_INT (G_LITTLE_ENDIAN), GST_PROPS_INT (G_BIG_ENDIAN)),
|
|
"signed", GST_PROPS_LIST (GST_PROPS_BOOLEAN (FALSE), GST_PROPS_BOOLEAN (TRUE)),
|
|
"width", GST_PROPS_INT_RANGE (8, 32),
|
|
"depth", GST_PROPS_INT_RANGE (8, 32),
|
|
"rate", GST_PROPS_INT_RANGE (8000, 192000),
|
|
"channels", GST_PROPS_INT_RANGE (1, 16)
|
|
),
|
|
GST_CAPS_NEW (
|
|
"sinesrc_float_src",
|
|
"audio/raw",
|
|
"format", GST_PROPS_STRING ("float"),
|
|
"layout", GST_PROPS_LIST (GST_PROPS_STRING ("gfloat"), GST_PROPS_STRING ("gdouble")),
|
|
"intercept", GST_PROPS_FLOAT (0),
|
|
"slope", GST_PROPS_FLOAT (1),
|
|
"channels", GST_PROPS_INT_RANGE (1, 16)
|
|
)
|
|
);
|
|
|
|
static GstElementClass *parent_class = NULL;
|
|
|
|
static void sinesrc_init (SineSrc *src);
|
|
static void sinesrc_class_init (SineSrcClass *klass);
|
|
|
|
static GstBuffer * sinesrc_get (GstPad *pad);
|
|
static GstElementStateReturn sinesrc_change_state (GstElement *element);
|
|
|
|
|
|
GType
|
|
sinesrc_get_type (void)
|
|
{
|
|
static GType sinesrc_type = 0;
|
|
|
|
if (!sinesrc_type) {
|
|
static const GTypeInfo sinesrc_info = {
|
|
sizeof (SineSrcClass), NULL, NULL,
|
|
(GClassInitFunc) sinesrc_class_init, NULL, NULL,
|
|
sizeof (SineSrc), 0,
|
|
(GInstanceInitFunc) sinesrc_init,
|
|
};
|
|
sinesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "SineSrc",
|
|
&sinesrc_info, 0);
|
|
}
|
|
return sinesrc_type;
|
|
}
|
|
static void
|
|
sinesrc_class_init (SineSrcClass *klass)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
element_class->change_state = sinesrc_change_state;
|
|
|
|
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
|
|
}
|
|
|
|
static void
|
|
sinesrc_init (SineSrc *src)
|
|
{
|
|
src->src = gst_pad_new_from_template (
|
|
GST_PAD_TEMPLATE_GET (sinesrc_src_factory), "src");
|
|
gst_element_add_pad (GST_ELEMENT(src), src->src);
|
|
gst_pad_set_get_function (src->src, sinesrc_get);
|
|
|
|
src->width = 16;
|
|
src->depth = 16;
|
|
src->sign = TRUE;
|
|
src->endianness = G_BYTE_ORDER;
|
|
src->rate = 44100;
|
|
src->channels = 1;
|
|
src->type = SINE_SRC_INT;
|
|
src->newcaps = TRUE;
|
|
|
|
src->pre_get_func = NULL;
|
|
|
|
GST_OBJECT (src)->name = "sinesrc";
|
|
}
|
|
|
|
static void
|
|
sinesrc_force_caps (SineSrc *src) {
|
|
GstCaps *caps;
|
|
|
|
if (!src->newcaps)
|
|
return;
|
|
|
|
src->newcaps = FALSE;
|
|
|
|
switch (src->type) {
|
|
case SINE_SRC_INT:
|
|
caps = GST_CAPS_NEW (
|
|
"sinesrc_src_caps",
|
|
"audio/raw",
|
|
"format", GST_PROPS_STRING ("int"),
|
|
"law", GST_PROPS_INT (0),
|
|
"signed", GST_PROPS_BOOLEAN (src->sign),
|
|
"width", GST_PROPS_INT (src->width),
|
|
"depth", GST_PROPS_INT (src->depth)
|
|
);
|
|
if (src->width > 8)
|
|
gst_props_add_entry (gst_caps_get_props (caps),
|
|
gst_props_entry_new ("endianness",
|
|
GST_PROPS_INT (src->endianness)));
|
|
break;
|
|
case SINE_SRC_FLOAT:
|
|
g_assert (src->width == 32 || src->width == 64);
|
|
caps = GST_CAPS_NEW (
|
|
"sinesrc_src_caps",
|
|
"audio/raw",
|
|
"format", GST_PROPS_STRING ("float"),
|
|
"intercept", GST_PROPS_FLOAT (0),
|
|
"slope", GST_PROPS_FLOAT (1)
|
|
);
|
|
if (src->width == 32) {
|
|
gst_props_add_entry (gst_caps_get_props (caps),
|
|
gst_props_entry_new ("layout",
|
|
GST_PROPS_STRING ("gfloat")));
|
|
} else if (src->width == 64) {
|
|
gst_props_add_entry (gst_caps_get_props (caps),
|
|
gst_props_entry_new ("layout",
|
|
GST_PROPS_STRING ("gdouble")));
|
|
} else {
|
|
g_assert_not_reached ();
|
|
}
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
gst_props_add_entry (gst_caps_get_props (caps),
|
|
gst_props_entry_new ("rate", GST_PROPS_INT (src->rate)));
|
|
gst_props_add_entry (gst_caps_get_props (caps),
|
|
gst_props_entry_new ("channels", GST_PROPS_INT (src->channels)));
|
|
|
|
g_assert (gst_pad_try_set_caps (src->src, caps) == GST_PAD_LINK_OK);
|
|
}
|
|
/* always return 1 wave
|
|
* there are 200 waves in 1 second, so the frequency is samplerate/200
|
|
*/
|
|
static guint8 UIDENTITY(guint8 x) { return x; };
|
|
static gint8 IDENTITY(gint8 x) { return x; };
|
|
#define POPULATE(format, be_func, le_func) {\
|
|
format val = (format) int_value;\
|
|
switch (src->endianness) {\
|
|
case G_LITTLE_ENDIAN:\
|
|
val = le_func (val);\
|
|
break;\
|
|
case G_BIG_ENDIAN:\
|
|
val = be_func (val);\
|
|
break;\
|
|
default: \
|
|
g_assert_not_reached ();\
|
|
};\
|
|
format* p = data;\
|
|
for (j = 0; j < src->channels; j++) {\
|
|
*p = val;\
|
|
p ++;\
|
|
}\
|
|
data = p;\
|
|
}
|
|
static GstBuffer *
|
|
sinesrc_get (GstPad *pad)
|
|
{
|
|
GstBuffer *buf;
|
|
SineSrc *src;
|
|
|
|
void *data;
|
|
gint i, j;
|
|
gdouble value;
|
|
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
src = SINESRC(gst_pad_get_parent (pad));
|
|
|
|
if (src->pre_get_func)
|
|
src->pre_get_func (src);
|
|
|
|
g_assert ((buf = gst_buffer_new_and_alloc ((src->width / 8) * src->channels * SAMPLES_PER_WAVE)));
|
|
g_assert ((data = GST_BUFFER_DATA(buf)));
|
|
|
|
for (i = 0; i < SAMPLES_PER_WAVE; i++) {
|
|
value = sin (i * 2 * M_PI / SAMPLES_PER_WAVE);
|
|
switch (src->type) {
|
|
case SINE_SRC_INT: {
|
|
gint64 int_value = (value + (src->sign ? 0 : 1)) * (((guint64) 1) << (src->depth - 1));
|
|
if (int_value == (1 + (src->sign ? 0 : 1)) * (((guint64) 1) << (src->depth - 1))) int_value--;
|
|
switch (src->width) {
|
|
case 8:
|
|
if (src->sign)
|
|
POPULATE (gint8, IDENTITY, IDENTITY)
|
|
else
|
|
POPULATE (guint8, UIDENTITY, UIDENTITY)
|
|
break;
|
|
case 16:
|
|
if (src->sign)
|
|
POPULATE (gint16, GINT16_TO_BE, GINT16_TO_LE)
|
|
else
|
|
POPULATE (guint16, GUINT16_TO_BE, GUINT16_TO_LE)
|
|
break;
|
|
case 24:
|
|
if (src->sign) {
|
|
gpointer p;
|
|
gint32 val = (gint32) int_value;
|
|
switch (src->endianness) {
|
|
case G_LITTLE_ENDIAN:
|
|
val = GINT32_TO_LE (val);
|
|
break;
|
|
case G_BIG_ENDIAN:
|
|
val = GINT32_TO_BE (val);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
};
|
|
p = &val;
|
|
if (src->endianness == G_BIG_ENDIAN)
|
|
p++;
|
|
for (j = 0; j < src->channels; j++) {
|
|
memcpy (data, p, 3);
|
|
data += 3;
|
|
}
|
|
} else {
|
|
gpointer p;
|
|
guint32 val = (guint32) int_value;
|
|
switch (src->endianness) {
|
|
case G_LITTLE_ENDIAN:
|
|
val = GUINT32_TO_LE (val);
|
|
break;
|
|
case G_BIG_ENDIAN:
|
|
val = GUINT32_TO_BE (val);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
};
|
|
p = &val;
|
|
if (src->endianness == G_BIG_ENDIAN)
|
|
p++;
|
|
for (j = 0; j < src->channels; j++) {
|
|
memcpy (data, p, 3);
|
|
data += 3;
|
|
}
|
|
}
|
|
break;
|
|
case 32:
|
|
if (src->sign)
|
|
POPULATE (gint32, GINT32_TO_BE, GINT32_TO_LE)
|
|
else
|
|
POPULATE (guint32, GUINT32_TO_BE, GUINT32_TO_LE)
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
break;
|
|
}
|
|
case SINE_SRC_FLOAT:
|
|
if (src->width == 32) {
|
|
gfloat *p = (gfloat *) data;
|
|
gfloat fval = (gfloat) value;
|
|
for (j = 0; j < src->channels; j++) {
|
|
*p = fval;
|
|
p++;
|
|
}
|
|
data = p;
|
|
break;
|
|
}
|
|
if (src->width == 64) {
|
|
gdouble *p = (gdouble *) data;
|
|
for (j = 0; j < src->channels; j++) {
|
|
*p = value;
|
|
p++;
|
|
}
|
|
data = p;
|
|
break;
|
|
}
|
|
g_assert_not_reached ();
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
|
|
if (src->newcaps) {
|
|
sinesrc_force_caps(src);
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
GstElement *
|
|
sinesrc_new (void)
|
|
{
|
|
return GST_ELEMENT (g_object_new (TYPE_SINESRC, NULL));
|
|
}
|
|
void
|
|
sinesrc_set_pre_get_func (SineSrc *src, PreGetFunc func)
|
|
{
|
|
src->pre_get_func = func;
|
|
}
|
|
static GstElementStateReturn
|
|
sinesrc_change_state (GstElement *element)
|
|
{
|
|
SineSrc *sinesrc;
|
|
|
|
g_return_val_if_fail (element != NULL, FALSE);
|
|
sinesrc = SINESRC (element);
|
|
|
|
switch (GST_STATE_TRANSITION (element)) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
sinesrc->newcaps = TRUE;
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
if (GST_ELEMENT_CLASS (parent_class)->change_state)
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
|
|
|
|
return GST_STATE_SUCCESS;
|
|
}
|