gstreamer/gst/synaesthesia/gstsynaesthesia.c
Stefan Kost 128a2458de Port synaesthesia.
Original commit message from CVS:
* configure.ac:
* gst/synaesthesia/Makefile.am:
* gst/synaesthesia/gstsynaesthesia.c: (gst_synaesthesia_init),
(gst_synaesthesia_sink_setcaps), (gst_synaesthesia_src_getcaps),
(gst_synaesthesia_src_setcaps), (gst_synaesthesia_chain),
(gst_synaesthesia_change_state), (plugin_init):
Port synaesthesia.
2006-09-18 12:29:09 +00:00

451 lines
13 KiB
C

/* gstsynaesthesia.c: implementation of synaesthesia drawing element
* Copyright (C) <2001> Richard Boulton <richard@tartarus.org>
*
* 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 <gst/gst.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <gst/base/gstadapter.h>
#include "synaescope.h"
#define SYNAES_SAMPLES 512
#define SYNAES_WIDTH 320
#define SYNAES_HEIGHT 200
#define GST_TYPE_SYNAESTHESIA (gst_synaesthesia_get_type())
#define GST_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SYNAESTHESIA,GstSynaesthesia))
#define GST_SYNAESTHESIA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SYNAESTHESIA,GstSynaesthesia))
#define GST_IS_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SYNAESTHESIA))
#define GST_IS_SYNAESTHESIA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SYNAESTHESIA))
typedef struct _GstSynaesthesia GstSynaesthesia;
typedef struct _GstSynaesthesiaClass GstSynaesthesiaClass;
GST_DEBUG_CATEGORY_STATIC (synaesthesia_debug);
#define GST_CAT_DEFAULT (synaesthesia_debug)
struct _GstSynaesthesia
{
GstElement element;
/* pads */
GstPad *sinkpad, *srcpad;
GstAdapter *adapter;
/* the timestamp of the next frame */
guint64 audio_basetime;
guint64 samples_consumed;
gint16 datain[2][SYNAES_SAMPLES];
/* video state */
gdouble fps;
gint width;
gint height;
gint channels;
/* Audio state */
gint sample_rate;
};
struct _GstSynaesthesiaClass
{
GstElementClass parent_class;
};
GType gst_synaesthesia_get_type (void);
/* elementfactory information */
static const GstElementDetails gst_synaesthesia_details =
GST_ELEMENT_DETAILS ("Synaesthesia",
"Visualization",
"Creates video visualizations of audio input, using stereo and pitch information",
"Richard Boulton <richard@tartarus.org>");
/* signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
static GstStaticPadTemplate gst_synaesthesia_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN)
);
static GstStaticPadTemplate gst_synaesthesia_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS)
);
static void gst_synaesthesia_base_init (gpointer g_class);
static void gst_synaesthesia_class_init (GstSynaesthesiaClass * klass);
static void gst_synaesthesia_init (GstSynaesthesia * synaesthesia);
static void gst_synaesthesia_finalize (GObject * object);
static void gst_synaesthesia_dispose (GObject * object);
static GstFlowReturn gst_synaesthesia_chain (GstPad * pad, GstBuffer * buffer);
static GstStateChangeReturn
gst_synaesthesia_change_state (GstElement * element, GstStateChange transition);
static GstCaps *gst_synaesthesia_src_getcaps (GstPad * pad);
static gboolean gst_synaesthesia_src_setcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_synaesthesia_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstElementClass *parent_class = NULL;
GType
gst_synaesthesia_get_type (void)
{
static GType type = 0;
if (!type) {
static const GTypeInfo info = {
sizeof (GstSynaesthesiaClass),
gst_synaesthesia_base_init,
NULL,
(GClassInitFunc) gst_synaesthesia_class_init,
NULL,
NULL,
sizeof (GstSynaesthesia),
0,
(GInstanceInitFunc) gst_synaesthesia_init,
};
type =
g_type_register_static (GST_TYPE_ELEMENT, "GstSynaesthesia", &info, 0);
}
return type;
}
static void
gst_synaesthesia_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_synaesthesia_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_synaesthesia_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_synaesthesia_sink_template));
}
static void
gst_synaesthesia_class_init (GstSynaesthesiaClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gstelement_class->change_state = gst_synaesthesia_change_state;
gobject_class->dispose = gst_synaesthesia_dispose;
gobject_class->finalize = gst_synaesthesia_finalize;
}
static void
gst_synaesthesia_init (GstSynaesthesia * synaesthesia)
{
/* create the sink and src pads */
synaesthesia->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_synaesthesia_sink_template), "sink");
synaesthesia->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_synaesthesia_src_template), "src");
gst_element_add_pad (GST_ELEMENT (synaesthesia), synaesthesia->sinkpad);
gst_element_add_pad (GST_ELEMENT (synaesthesia), synaesthesia->srcpad);
gst_pad_set_chain_function (synaesthesia->sinkpad, gst_synaesthesia_chain);
gst_pad_set_setcaps_function (synaesthesia->sinkpad,
gst_synaesthesia_sink_setcaps);
gst_pad_set_getcaps_function (synaesthesia->srcpad,
gst_synaesthesia_src_getcaps);
gst_pad_set_setcaps_function (synaesthesia->srcpad,
gst_synaesthesia_src_setcaps);
synaesthesia->adapter = gst_adapter_new ();
/* reset the initial video state */
synaesthesia->width = SYNAES_WIDTH;
synaesthesia->height = SYNAES_HEIGHT;
synaesthesia->fps = 25.0; /* desired frame rate */
synaesthesia->sample_rate = 0;
synaesthesia->channels = 2;
synaesthesia->audio_basetime = GST_CLOCK_TIME_NONE;
synaesthesia->samples_consumed = 0;
synaesthesia_init (synaesthesia->width, synaesthesia->height);
}
static void
gst_synaesthesia_dispose (GObject * object)
{
GstSynaesthesia *synaesthesia;
synaesthesia = GST_SYNAESTHESIA (object);
if (synaesthesia->adapter) {
g_object_unref (synaesthesia->adapter);
synaesthesia->adapter = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_synaesthesia_finalize (GObject * object)
{
GstSynaesthesia *synaesthesia;
synaesthesia = GST_SYNAESTHESIA (object);
synaesthesia_close ();
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_synaesthesia_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstSynaesthesia *synaesthesia;
GstStructure *structure;
gint channels;
gint rate;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "channels", &channels) ||
!gst_structure_get_int (structure, "rate", &rate)) {
return GST_PAD_LINK_REFUSED;
}
if (synaesthesia->channels != 2)
return GST_PAD_LINK_REFUSED;
synaesthesia->sample_rate = rate;
return TRUE;
}
static GstCaps *
gst_synaesthesia_src_getcaps (GstPad * pad)
{
GstSynaesthesia *synaesthesia;
GstCaps *caps;
const GstCaps *templcaps;
gint i;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
templcaps = gst_pad_get_pad_template_caps (pad);
caps = gst_caps_copy (templcaps);
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *structure = gst_caps_get_structure (caps, i);
gst_structure_set (structure,
"width", G_TYPE_INT, synaesthesia->width,
"height", G_TYPE_INT, synaesthesia->height,
"framerate", GST_TYPE_FRACTION, (gint) synaesthesia->fps, 1, NULL);
//gst_structure_set (structure, "width", G_TYPE_INT, SYNAES_WIDTH, "height",
// G_TYPE_INT, SYNAES_HEIGHT, NULL);
}
gst_object_unref (synaesthesia);
GST_DEBUG ("final caps are %" GST_PTR_FORMAT, caps);
return caps;
}
static gboolean
gst_synaesthesia_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstSynaesthesia *synaesthesia;
GstStructure *structure;
gint w, h;
gdouble fps;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &w) ||
!gst_structure_get_int (structure, "height", &h) ||
!gst_structure_get_double (structure, "framerate", &fps)) {
return GST_PAD_LINK_REFUSED;
}
if ((w != SYNAES_WIDTH) || (h != SYNAES_HEIGHT))
return GST_PAD_LINK_REFUSED;
synaesthesia->width = w;
synaesthesia->height = h;
synaesthesia->fps = fps;
synaesthesia_init (synaesthesia->width, synaesthesia->height);
gst_object_unref (synaesthesia);
return TRUE;
}
static GstFlowReturn
gst_synaesthesia_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
GstSynaesthesia *synaesthesia;
guint32 bytesperread;
gint samples_per_frame;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
GST_DEBUG ("chainfunc called");
/* resync on DISCONT */
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) {
synaesthesia->audio_basetime = GST_CLOCK_TIME_NONE;
synaesthesia->samples_consumed = 0;
gst_adapter_clear (synaesthesia->adapter);
}
if (GST_PAD_CAPS (synaesthesia->srcpad) == NULL) {
GstCaps *target;
GST_DEBUG ("fixating");
if ((target = gst_synaesthesia_src_getcaps (synaesthesia->srcpad))) {
gst_pad_set_caps (synaesthesia->srcpad, target);
gst_caps_unref (target);
} else {
GST_DEBUG ("no caps on srcpad");
return GST_FLOW_NOT_NEGOTIATED;
}
}
if (synaesthesia->audio_basetime == GST_CLOCK_TIME_NONE)
synaesthesia->audio_basetime = GST_BUFFER_TIMESTAMP (buffer);
if (synaesthesia->audio_basetime == GST_CLOCK_TIME_NONE)
synaesthesia->audio_basetime = 0;
bytesperread = SYNAES_SAMPLES * synaesthesia->channels * sizeof (gint16);
samples_per_frame = synaesthesia->sample_rate / synaesthesia->fps;
gst_adapter_push (synaesthesia->adapter, buffer);
while (gst_adapter_available (synaesthesia->adapter) >
MAX (bytesperread,
samples_per_frame * synaesthesia->channels * sizeof (gint16))) {
const guint16 *data =
(const guint16 *) gst_adapter_peek (synaesthesia->adapter,
bytesperread);
GstBuffer *outbuf;
guchar *out_frame;
GstClockTimeDiff frame_duration = GST_SECOND / synaesthesia->fps;
gint i;
for (i = 0; i < SYNAES_SAMPLES; i++) {
synaesthesia->datain[0][i] = *data++;
synaesthesia->datain[1][i] = *data++;
}
ret =
gst_pad_alloc_buffer_and_set_caps (synaesthesia->srcpad,
GST_BUFFER_OFFSET_NONE, synaesthesia->width * synaesthesia->height * 4,
GST_PAD_CAPS (synaesthesia->srcpad), &outbuf);
/* no buffer allocated, we don't care why. */
if (ret != GST_FLOW_OK)
return ret;
GST_BUFFER_TIMESTAMP (outbuf) =
synaesthesia->audio_basetime +
(GST_SECOND * synaesthesia->samples_consumed /
synaesthesia->sample_rate);
GST_BUFFER_DURATION (outbuf) = frame_duration;
GST_BUFFER_SIZE (outbuf) = synaesthesia->width * synaesthesia->height * 4;
out_frame = (guchar *) synaesthesia_update (synaesthesia->datain);
memcpy (GST_BUFFER_DATA (outbuf), out_frame, GST_BUFFER_SIZE (outbuf));
gst_pad_push (synaesthesia->srcpad, outbuf);
synaesthesia->samples_consumed += samples_per_frame;
gst_adapter_flush (synaesthesia->adapter, samples_per_frame *
synaesthesia->channels * sizeof (gint16));
}
gst_object_unref (synaesthesia);
return ret;
}
static GstStateChangeReturn
gst_synaesthesia_change_state (GstElement * element, GstStateChange transition)
{
GstSynaesthesia *synaesthesia;
synaesthesia = GST_SYNAESTHESIA (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
synaesthesia->audio_basetime = GST_CLOCK_TIME_NONE;
gst_adapter_clear (synaesthesia->adapter);
break;
default:
break;
}
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (synaesthesia_debug, "synaesthesia", 0,
"synaesthesia audio visualisations");
return gst_element_register (plugin, "synaesthesia", GST_RANK_NONE,
GST_TYPE_SYNAESTHESIA);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"synaesthesia",
"Creates video visualizations of audio input, using stereo and pitch information",
plugin_init, VERSION, "GPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)