gstreamer/gst/sine/gstsinesrc.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstsinesrc.c:
*
* 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 <math.h>
#include <stdlib.h>
#include <string.h>
#include <gst/control/control.h>
#include "gstsinesrc.h"
/* elementfactory information */
GstElementDetails gst_sinesrc_details = {
"Sine-wave src",
"Source/Audio",
"Create a sine wave of a given frequency and volume",
"Erik Walthinsen <omega@cse.ogi.edu>"
};
/* SineSrc signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_TABLESIZE,
ARG_SAMPLES_PER_BUFFER,
ARG_FREQ,
ARG_VOLUME,
ARG_SYNC
};
static GstStaticPadTemplate gst_sinesrc_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) true, "
"width = (int) 16, "
"depth = (int) 16, " "rate = (int) [ 1, MAX ], " "channels = (int) 1")
);
static void gst_sinesrc_class_init (GstSineSrcClass * klass);
static void gst_sinesrc_base_init (GstSineSrcClass * klass);
static void gst_sinesrc_init (GstSineSrc * src);
static void gst_sinesrc_dispose (GObject * object);
static void gst_sinesrc_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_sinesrc_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstPadLinkReturn gst_sinesrc_link (GstPad * pad, const GstCaps * caps);
static GstElementStateReturn gst_sinesrc_change_state (GstElement * element);
static void gst_sinesrc_set_clock (GstElement * element, GstClock * clock);
static void gst_sinesrc_update_freq (const GValue * value, gpointer data);
static void gst_sinesrc_populate_sinetable (GstSineSrc * src);
static inline void gst_sinesrc_update_table_inc (GstSineSrc * src);
static const GstQueryType *gst_sinesrc_get_query_types (GstPad * pad);
static gboolean gst_sinesrc_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value);
static GstData *gst_sinesrc_get (GstPad * pad);
static GstCaps *gst_sinesrc_src_fixate (GstPad * pad, const GstCaps * caps);
static GstElementClass *parent_class = NULL;
/*static guint gst_sinesrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_sinesrc_get_type (void)
{
static GType sinesrc_type = 0;
if (!sinesrc_type) {
static const GTypeInfo sinesrc_info = {
sizeof (GstSineSrcClass),
(GBaseInitFunc) gst_sinesrc_base_init, NULL,
(GClassInitFunc) gst_sinesrc_class_init, NULL, NULL,
sizeof (GstSineSrc), 0,
(GInstanceInitFunc) gst_sinesrc_init,
};
sinesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstSineSrc",
&sinesrc_info, 0);
}
return sinesrc_type;
}
static void
gst_sinesrc_base_init (GstSineSrcClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_sinesrc_src_template));
gst_element_class_set_details (element_class, &gst_sinesrc_details);
}
static void
gst_sinesrc_class_init (GstSineSrcClass * 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_TABLESIZE,
g_param_spec_int ("tablesize", "tablesize", "tablesize",
1, G_MAXINT, 1024, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass),
ARG_SAMPLES_PER_BUFFER,
g_param_spec_int ("samplesperbuffer", "Samples per buffer",
"Number of samples in each outgoing buffer",
1, G_MAXINT, 1024, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FREQ,
g_param_spec_double ("freq", "Frequency", "Frequency of sine source",
0.0, 20000.0, 440.0, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_VOLUME,
g_param_spec_double ("volume", "Volume", "Volume",
0.0, 1.0, 0.8, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SYNC,
g_param_spec_boolean ("sync", "Sync", "Synchronize to clock",
FALSE, G_PARAM_READWRITE));
gobject_class->set_property = gst_sinesrc_set_property;
gobject_class->get_property = gst_sinesrc_get_property;
gobject_class->dispose = gst_sinesrc_dispose;
gstelement_class->change_state = gst_sinesrc_change_state;
gstelement_class->set_clock = gst_sinesrc_set_clock;
}
static void
gst_sinesrc_init (GstSineSrc * src)
{
src->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_sinesrc_src_template), "src");
gst_pad_set_link_function (src->srcpad, gst_sinesrc_link);
gst_pad_set_fixate_function (src->srcpad, gst_sinesrc_src_fixate);
gst_pad_set_get_function (src->srcpad, gst_sinesrc_get);
gst_pad_set_query_function (src->srcpad, gst_sinesrc_src_query);
gst_pad_set_query_type_function (src->srcpad, gst_sinesrc_get_query_types);
gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
src->samplerate = 44100;
src->volume = 1.0;
src->freq = 440.0;
src->sync = FALSE;
src->table_pos = 0.0;
src->table_size = 1024;
src->samples_per_buffer = 1024;
src->timestamp = G_GINT64_CONSTANT (0);
src->offset = G_GINT64_CONSTANT (0);
src->seq = 0;
src->dpman = gst_dpman_new ("sinesrc_dpman", GST_ELEMENT (src));
gst_dpman_add_required_dparam_callback (src->dpman,
g_param_spec_double ("freq", "Frequency (Hz)", "Frequency of the tone",
10.0, 10000.0, 350.0, G_PARAM_READWRITE),
"hertz", gst_sinesrc_update_freq, src);
gst_dpman_add_required_dparam_direct (src->dpman,
g_param_spec_double ("volume", "Volume", "Volume of the tone",
0.0, 1.0, 0.8, G_PARAM_READWRITE), "scalar", &(src->volume)
);
gst_dpman_set_rate (src->dpman, src->samplerate);
gst_sinesrc_populate_sinetable (src);
gst_sinesrc_update_table_inc (src);
}
static void
gst_sinesrc_dispose (GObject * object)
{
GstSineSrc *sinesrc = GST_SINESRC (object);
g_free (sinesrc->table_data);
sinesrc->table_data = NULL;
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static void
gst_sinesrc_set_clock (GstElement * element, GstClock * clock)
{
GstSineSrc *sinesrc = GST_SINESRC (element);
gst_object_replace ((GstObject **) & sinesrc->clock, (GstObject *) clock);
}
static GstCaps *
gst_sinesrc_src_fixate (GstPad * pad, const GstCaps * caps)
{
GstStructure *structure;
GstCaps *newcaps;
if (gst_caps_get_size (caps) > 1)
return NULL;
newcaps = gst_caps_copy (caps);
structure = gst_caps_get_structure (newcaps, 0);
if (gst_caps_structure_fixate_field_nearest_int (structure, "rate", 44100)) {
return newcaps;
}
gst_caps_free (newcaps);
return NULL;
}
static GstPadLinkReturn
gst_sinesrc_link (GstPad * pad, const GstCaps * caps)
{
GstSineSrc *sinesrc;
const GstStructure *structure;
gboolean ret;
GST_DEBUG ("gst_sinesrc_src_link");
sinesrc = GST_SINESRC (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "rate", &sinesrc->samplerate);
if (!ret)
return GST_PAD_LINK_REFUSED;
return GST_PAD_LINK_OK;
}
static const GstQueryType *
gst_sinesrc_get_query_types (GstPad * pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_POSITION,
0,
};
return query_types;
}
static gboolean
gst_sinesrc_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value)
{
gboolean res = FALSE;
GstSineSrc *src;
src = GST_SINESRC (gst_pad_get_parent (pad));
switch (type) {
case GST_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_TIME:
*value = src->timestamp;
res = TRUE;
break;
case GST_FORMAT_DEFAULT: /* samples */
*value = src->offset / 2; /* 16bpp audio */
res = TRUE;
break;
case GST_FORMAT_BYTES:
*value = src->offset;
res = TRUE;
break;
default:
break;
}
break;
default:
break;
}
return res;
}
static GstData *
gst_sinesrc_get (GstPad * pad)
{
GstSineSrc *src;
GstBuffer *buf;
guint tdiff;
gint16 *samples;
gint i = 0;
g_return_val_if_fail (pad != NULL, NULL);
src = GST_SINESRC (gst_pad_get_parent (pad));
if (!src->tags_pushed) {
GstTagList *taglist;
GstEvent *event;
taglist = gst_tag_list_new ();
gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND,
GST_TAG_DESCRIPTION, "sine wave", NULL);
gst_element_found_tags (GST_ELEMENT (src), taglist);
event = gst_event_new_tag (taglist);
src->tags_pushed = TRUE;
return GST_DATA (event);
}
tdiff = src->samples_per_buffer * GST_SECOND / src->samplerate;
/* note: the 2 is because of the format we use */
buf = gst_buffer_new_and_alloc (src->samples_per_buffer * 2);
GST_BUFFER_TIMESTAMP (buf) = src->timestamp;
if (src->sync) {
if (src->clock) {
gst_element_wait (GST_ELEMENT (src), GST_BUFFER_TIMESTAMP (buf));
}
}
/* offset is the number of samples */
GST_BUFFER_OFFSET (buf) = src->offset;
GST_BUFFER_OFFSET_END (buf) = src->offset + src->samples_per_buffer;
GST_BUFFER_DURATION (buf) = tdiff;
samples = (gint16 *) GST_BUFFER_DATA (buf);
GST_DPMAN_PREPROCESS (src->dpman, src->samples_per_buffer, src->timestamp);
src->timestamp += tdiff;
src->offset += src->samples_per_buffer;
while (GST_DPMAN_PROCESS (src->dpman, i)) {
#if 0
src->table_lookup = (gint) (src->table_pos);
src->table_lookup_next = src->table_lookup + 1;
src->table_interp = src->table_pos - src->table_lookup;
/* wrap the array lookups if we're out of bounds */
if (src->table_lookup_next >= src->table_size) {
src->table_lookup_next -= src->table_size;
if (src->table_lookup >= src->table_size) {
src->table_lookup -= src->table_size;
src->table_pos -= src->table_size;
}
}
src->table_pos += src->table_inc;
/*no interpolation */
/*samples[i] = src->table_data[src->table_lookup] */
/* * src->volume * 32767.0; */
/*linear interpolation */
samples[i] = ((src->table_interp * (src->table_data[src->table_lookup_next]
- src->table_data[src->table_lookup]
)
) + src->table_data[src->table_lookup]
) * src->volume * 32767.0;
#endif
src->accumulator += 2 * M_PI * src->freq / src->samplerate;
if (src->accumulator >= 2 * M_PI) {
src->accumulator -= 2 * M_PI;
}
samples[i] = sin (src->accumulator) * src->volume * 32767.0;
i++;
}
if (!GST_PAD_CAPS (src->srcpad)) {
if (gst_sinesrc_link (src->srcpad,
gst_pad_get_allowed_caps (src->srcpad)) <= 0) {
GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL), (NULL));
return NULL;
}
}
return GST_DATA (buf);
}
static void
gst_sinesrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSineSrc *src;
g_return_if_fail (GST_IS_SINESRC (object));
src = GST_SINESRC (object);
switch (prop_id) {
case ARG_TABLESIZE:
src->table_size = g_value_get_int (value);
gst_sinesrc_populate_sinetable (src);
gst_sinesrc_update_table_inc (src);
break;
case ARG_SAMPLES_PER_BUFFER:
src->samples_per_buffer = g_value_get_int (value);
break;
case ARG_FREQ:
gst_dpman_bypass_dparam (src->dpman, "freq");
gst_sinesrc_update_freq (value, src);
break;
case ARG_VOLUME:
gst_dpman_bypass_dparam (src->dpman, "volume");
src->volume = g_value_get_double (value);
break;
case ARG_SYNC:
src->sync = g_value_get_boolean (value);
break;
default:
break;
}
}
static void
gst_sinesrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSineSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SINESRC (object));
src = GST_SINESRC (object);
switch (prop_id) {
case ARG_TABLESIZE:
g_value_set_int (value, src->table_size);
break;
case ARG_SAMPLES_PER_BUFFER:
g_value_set_int (value, src->samples_per_buffer);
break;
case ARG_FREQ:
g_value_set_double (value, src->freq);
break;
case ARG_VOLUME:
g_value_set_double (value, src->volume);
break;
case ARG_SYNC:
g_value_set_boolean (value, src->sync);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_sinesrc_change_state (GstElement * element)
{
GstSineSrc *src = GST_SINESRC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_READY:
src->timestamp = G_GINT64_CONSTANT (0);
src->offset = G_GINT64_CONSTANT (0);
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static void
gst_sinesrc_populate_sinetable (GstSineSrc * src)
{
gint i;
gdouble pi2scaled = M_PI * 2 / src->table_size;
gdouble *table = g_new (gdouble, src->table_size);
for (i = 0; i < src->table_size; i++) {
table[i] = (gdouble) sin (i * pi2scaled);
}
g_free (src->table_data);
src->table_data = table;
}
static void
gst_sinesrc_update_freq (const GValue * value, gpointer data)
{
GstSineSrc *src = (GstSineSrc *) data;
g_return_if_fail (GST_IS_SINESRC (src));
src->freq = g_value_get_double (value);
src->table_inc = src->table_size * src->freq / src->samplerate;
/*GST_DEBUG ("freq %f", src->freq); */
}
static inline void
gst_sinesrc_update_table_inc (GstSineSrc * src)
{
src->table_inc = src->table_size * src->freq / src->samplerate;
}
#if 0
static gboolean
gst_sinesrc_force_caps (GstSineSrc * src)
{
static GstStaticCaps static_caps = GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) true, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 8000, 48000 ], " "channels = (int) 1");
GstCaps *caps;
GstStructure *structure;
if (!src->newcaps)
return TRUE;
caps = gst_caps_copy (gst_static_caps_get (&static_caps));
structure = gst_caps_get_structure (caps, 0);
gst_structure_set (structure, "rate", G_TYPE_INT, src->samplerate, NULL);
src->newcaps = gst_pad_try_set_caps (src->srcpad, caps) < GST_PAD_LINK_OK;
return !src->newcaps;
}
#endif
static gboolean
plugin_init (GstPlugin * plugin)
{
/* initialize dparam support library */
gst_control_init (NULL, NULL);
return gst_element_register (plugin, "sinesrc",
GST_RANK_NONE, GST_TYPE_SINESRC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"sine",
"Sine audio wave generator",
plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)