gstreamer/gst/sine/gstsinesrc.c
Stefan Kost b5f1cf664d gst/sine/gstsinesrc.c: moved statement below switch
Original commit message from CVS:
* gst/sine/gstsinesrc.c: (gst_sinesrc_src_query):
moved statement below switch
* gst/volume/gstvolume.c: (gst_volume_class_init):
added debug ptr
2005-08-17 21:07:21 +00:00

516 lines
14 KiB
C

/* 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 "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,
ARG_TIMESTAMP_OFFSET,
};
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 gboolean gst_sinesrc_setcaps (GstBaseSrc * basesrc, GstCaps * caps);
static void gst_sinesrc_src_fixate (GstPad * pad, GstCaps * caps);
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, GstQuery * query);
static GstFlowReturn gst_sinesrc_create (GstBaseSrc * basesrc, guint64 offset,
guint length, GstBuffer ** buffer);
static gboolean gst_sinesrc_start (GstBaseSrc * basesrc);
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_BASE_SRC, "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;
GstBaseSrcClass *gstbasesrc_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_BASE_SRC);
gobject_class->set_property = gst_sinesrc_set_property;
gobject_class->get_property = gst_sinesrc_get_property;
gobject_class->dispose = gst_sinesrc_dispose;
g_object_class_install_property (gobject_class, 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 (gobject_class, 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 (gobject_class, ARG_VOLUME,
g_param_spec_double ("volume", "Volume", "Volume",
0.0, 1.0, 0.8, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_SYNC,
g_param_spec_boolean ("sync", "Sync", "Synchronize to clock",
FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TIMESTAMP_OFFSET,
g_param_spec_int64 ("timestamp-offset", "Timestamp offset",
"An offset added to timestamps set on buffers (in ns)", G_MININT64,
G_MAXINT64, 0, G_PARAM_READWRITE));
//gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR ();
gstbasesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_sinesrc_setcaps);
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_sinesrc_start);
gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_sinesrc_create);
}
static void
gst_sinesrc_init (GstSineSrc * src)
{
src->srcpad = GST_BASE_SRC (src)->srcpad;
gst_pad_set_fixatecaps_function (src->srcpad, gst_sinesrc_src_fixate);
gst_pad_set_query_function (src->srcpad, gst_sinesrc_src_query);
gst_pad_set_query_type_function (src->srcpad, gst_sinesrc_get_query_types);
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->timestamp_offset = G_GINT64_CONSTANT (0);
src->seq = 0;
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_src_fixate (GstPad * pad, GstCaps * caps)
{
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_caps_structure_fixate_field_nearest_int (structure, "rate", 44100);
}
static gboolean
gst_sinesrc_setcaps (GstBaseSrc * basesrc, GstCaps * caps)
{
GstSineSrc *sinesrc;
const GstStructure *structure;
gboolean ret;
sinesrc = GST_SINESRC (basesrc);
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "rate", &sinesrc->samplerate);
return ret;
}
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, GstQuery * query)
{
gboolean res = FALSE;
GstSineSrc *src;
src = GST_SINESRC (GST_PAD_PARENT (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
gint64 current;
gst_query_parse_position (query, &format, NULL, NULL);
switch (format) {
case GST_FORMAT_TIME:
current = src->timestamp;
res = TRUE;
break;
case GST_FORMAT_DEFAULT: /* samples */
current = src->offset / 2; /* 16bpp audio */
res = TRUE;
break;
case GST_FORMAT_BYTES:
current = src->offset;
res = TRUE;
break;
default:
break;
}
if (res) {
gst_query_set_position (query, format, current, -1);
}
break;
}
default:
break;
}
return res;
}
static GstFlowReturn
gst_sinesrc_create (GstBaseSrc * basesrc, guint64 offset,
guint length, GstBuffer ** buffer)
{
GstSineSrc *src;
GstBuffer *buf;
guint tdiff;
gint16 *samples;
gint i;
src = GST_SINESRC (basesrc);
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);
event = gst_event_new_tag (taglist);
gst_pad_push_event (basesrc->srcpad, event);
src->tags_pushed = TRUE;
}
/* not negotiated, fixate and set */
if (GST_PAD_CAPS (basesrc->srcpad) == NULL) {
GstCaps *caps;
/* see whatever we are allowed to do */
caps = gst_pad_get_allowed_caps (basesrc->srcpad);
/* fix unfixed values */
gst_sinesrc_src_fixate (basesrc->srcpad, caps);
/* and use those */
gst_pad_set_caps (basesrc->srcpad, caps);
gst_caps_unref (caps);
}
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_set_caps (buf, GST_PAD_CAPS (basesrc->srcpad));
GST_BUFFER_TIMESTAMP (buf) = src->timestamp + src->timestamp_offset;
/* 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);
src->timestamp += tdiff;
src->offset += src->samples_per_buffer;
for (i = 0; i < src->samples_per_buffer; 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++ = sin (src->accumulator) * src->volume * 32767.0;
}
*buffer = buf;
return GST_FLOW_OK;
}
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_sinesrc_update_freq (value, src);
break;
case ARG_VOLUME:
src->volume = g_value_get_double (value);
break;
case ARG_SYNC:
src->sync = g_value_get_boolean (value);
break;
case ARG_TIMESTAMP_OFFSET:
src->timestamp_offset = g_value_get_int64 (value);
break;
default:
break;
}
}
static void
gst_sinesrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSineSrc *src;
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;
case ARG_TIMESTAMP_OFFSET:
g_value_set_int64 (value, src->timestamp_offset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_sinesrc_start (GstBaseSrc * basesrc)
{
GstSineSrc *src = GST_SINESRC (basesrc);
src->timestamp = G_GINT64_CONSTANT (0);
src->offset = G_GINT64_CONSTANT (0);
return TRUE;
}
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;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
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)