gstreamer/gst/goom/gstgoom.c
Tim-Philipp Müller 945cf26c5a gst/: Use audiotestsrc instead of sinesrc (#323798).
Original commit message from CVS:
* gst/goom/gstgoom.c:
* gst/level/level-example.c: (main):
* gst/smoothwave/demo-osssrc.c: (main):
Use audiotestsrc instead of sinesrc (#323798).
2005-12-11 19:25:41 +00:00

462 lines
12 KiB
C

/* gstgoom.c: implementation of goom 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.
*/
/**
* SECTION:element-goom
* @see_also: synaesthesia
*
* <refsect2>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch -v audiotestsrc ! goom ! ffmpegcolorspace ! xvimagesink
* </programlisting>
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/gst.h>
#include "gstgoom.h"
#include <gst/video/video.h>
#include "goom_core.h"
GST_DEBUG_CATEGORY_STATIC (goom_debug);
#define GST_CAT_DEFAULT goom_debug
/* elementfactory information */
static GstElementDetails gst_goom_details = {
"GOOM: what a GOOM!",
"Visualization",
"Takes frames of data and outputs video frames using the GOOM filter",
"Wim Taymans <wim.taymans@chello.be>"
};
/* signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN)
);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", /* the name of the pads */
GST_PAD_SINK, /* type of the pad */
GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 8000, 96000 ], " "channels = (int) [ 1, 2 ]")
);
static void gst_goom_class_init (GstGoomClass * klass);
static void gst_goom_base_init (GstGoomClass * klass);
static void gst_goom_init (GstGoom * goom);
static void gst_goom_dispose (GObject * object);
static GstStateChangeReturn gst_goom_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_goom_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_goom_event (GstPad * pad, GstEvent * event);
static GstPadLinkReturn gst_goom_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstPadLinkReturn gst_goom_src_setcaps (GstPad * pad, GstCaps * caps);
static GstElementClass *parent_class = NULL;
GType
gst_goom_get_type (void)
{
static GType type = 0;
if (!type) {
static const GTypeInfo info = {
sizeof (GstGoomClass),
(GBaseInitFunc) gst_goom_base_init,
NULL,
(GClassInitFunc) gst_goom_class_init,
NULL,
NULL,
sizeof (GstGoom),
0,
(GInstanceInitFunc) gst_goom_init,
};
type = g_type_register_static (GST_TYPE_ELEMENT, "GstGoom", &info, 0);
}
return type;
}
static void
gst_goom_base_init (GstGoomClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details (element_class, &gst_goom_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
}
static void
gst_goom_class_init (GstGoomClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->dispose = gst_goom_dispose;
gstelement_class->change_state = gst_goom_change_state;
GST_DEBUG_CATEGORY_INIT (goom_debug, "goom", 0, "goom visualisation element");
}
static void
gst_goom_init (GstGoom * goom)
{
/* create the sink and src pads */
goom->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
"sink");
goom->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
"src");
gst_element_add_pad (GST_ELEMENT (goom), goom->sinkpad);
gst_element_add_pad (GST_ELEMENT (goom), goom->srcpad);
gst_pad_set_chain_function (goom->sinkpad, gst_goom_chain);
gst_pad_set_event_function (goom->sinkpad, gst_goom_event);
gst_pad_set_setcaps_function (goom->sinkpad, gst_goom_sink_setcaps);
gst_pad_set_setcaps_function (goom->srcpad, gst_goom_src_setcaps);
goom->adapter = gst_adapter_new ();
goom->width = 320;
goom->height = 200;
goom->fps_n = 25; /* desired frame rate */
goom->fps_d = 1; /* desired frame rate */
goom->channels = 0;
goom->sample_rate = 0;
goom->audio_basetime = GST_CLOCK_TIME_NONE;
goom->samples_consumed = 0;
goom->disposed = FALSE;
goom_init (goom->width, goom->height);
}
static void
gst_goom_dispose (GObject * object)
{
GstGoom *goom = GST_GOOM (object);
if (!goom->disposed) {
goom_close ();
goom->disposed = TRUE;
g_object_unref (goom->adapter);
goom->adapter = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
gst_goom_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstGoom *goom;
GstStructure *structure;
goom = GST_GOOM (GST_PAD_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "channels", &goom->channels);
gst_structure_get_int (structure, "rate", &goom->sample_rate);
return TRUE;
}
static gboolean
gst_goom_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstGoom *goom;
GstStructure *structure;
goom = GST_GOOM (GST_PAD_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &goom->width) ||
!gst_structure_get_int (structure, "height", &goom->height) ||
!gst_structure_get_fraction (structure, "framerate", &goom->fps_n,
&goom->fps_d))
return FALSE;
goom_set_resolution (goom->width, goom->height);
return TRUE;
}
static gboolean
gst_goom_src_negotiate (GstGoom * goom)
{
GstCaps *othercaps, *target, *intersect;
GstStructure *structure;
const GstCaps *templ;
templ = gst_pad_get_pad_template_caps (goom->srcpad);
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (goom->srcpad);
if (othercaps) {
intersect = gst_caps_intersect (othercaps, templ);
gst_caps_unref (othercaps);
if (gst_caps_is_empty (intersect))
goto no_format;
target = gst_caps_copy_nth (intersect, 0);
gst_caps_unref (intersect);
} else {
target = gst_caps_ref ((GstCaps *) templ);
}
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
gst_pad_set_caps (goom->srcpad, target);
gst_caps_unref (target);
return TRUE;
no_format:
{
gst_caps_unref (intersect);
gst_caps_unref (othercaps);
return FALSE;
}
}
static gboolean
gst_goom_event (GstPad * pad, GstEvent * event)
{
gboolean res;
GstGoom *goom;
goom = GST_GOOM (GST_PAD_PARENT (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
{
gint64 start = 0, stop = 0;
GstFormat format;
gst_event_parse_new_segment (event, NULL, NULL, &format, &start, &stop,
NULL);
gst_adapter_clear (goom->adapter);
goom->audio_basetime = start;
goom->samples_consumed = 0;
GST_DEBUG ("Got discont. Adjusting time to=%" G_GUINT64_FORMAT, start);
}
default:
res = gst_pad_event_default (pad, event);
break;
}
return res;
}
static GstFlowReturn
gst_goom_chain (GstPad * pad, GstBuffer * bufin)
{
GstGoom *goom;
guint32 bytesperread;
gint16 *data;
gint samples_per_frame;
GstFlowReturn ret;
goom = GST_GOOM (GST_PAD_PARENT (pad));
if (goom->channels == 0)
goto not_negotiated;
if (goom->audio_basetime == GST_CLOCK_TIME_NONE)
goom->audio_basetime = GST_BUFFER_TIMESTAMP (bufin);
if (goom->audio_basetime == GST_CLOCK_TIME_NONE)
goom->audio_basetime = 0;
bytesperread = GOOM_SAMPLES * goom->channels * sizeof (gint16);
samples_per_frame = goom->sample_rate * goom->fps_d / goom->fps_n;
data = (gint16 *) GST_BUFFER_DATA (bufin);
gst_adapter_push (goom->adapter, bufin);
GST_DEBUG ("Input buffer has %d samples, time=%" G_GUINT64_FORMAT,
GST_BUFFER_SIZE (bufin) * sizeof (gint16) * goom->channels,
GST_BUFFER_TIMESTAMP (bufin));
ret = GST_FLOW_OK;
if (GST_PAD_CAPS (goom->srcpad) == NULL) {
if (!gst_goom_src_negotiate (goom))
goto no_format;
}
/* Collect samples until we have enough for an output frame */
while (gst_adapter_available (goom->adapter) > MAX (bytesperread,
samples_per_frame * goom->channels * sizeof (gint16))) {
const guint16 *data;
GstBuffer *bufout;
guchar *out_frame;
GstClockTimeDiff frame_duration;
gint i;
frame_duration = gst_util_uint64_scale_int (GST_SECOND, goom->fps_d,
goom->fps_n);
data = (const guint16 *) gst_adapter_peek (goom->adapter, bytesperread);
if (goom->channels == 2) {
for (i = 0; i < GOOM_SAMPLES; i++) {
goom->datain[0][i] = *data++;
goom->datain[1][i] = *data++;
}
} else {
for (i = 0; i < GOOM_SAMPLES; i++) {
goom->datain[0][i] = *data;
goom->datain[1][i] = *data++;
}
}
ret =
gst_pad_alloc_buffer_and_set_caps (goom->srcpad, GST_BUFFER_OFFSET_NONE,
goom->width * goom->height * 4, GST_PAD_CAPS (goom->srcpad), &bufout);
if (ret != GST_FLOW_OK)
break;
GST_BUFFER_TIMESTAMP (bufout) =
goom->audio_basetime +
(GST_SECOND * goom->samples_consumed / goom->sample_rate);
GST_BUFFER_DURATION (bufout) = frame_duration;
GST_BUFFER_SIZE (bufout) = goom->width * goom->height * 4;
out_frame = (guchar *) goom_update (goom->datain);
memcpy (GST_BUFFER_DATA (bufout), out_frame, GST_BUFFER_SIZE (bufout));
GST_DEBUG ("Pushing frame with time=%" G_GUINT64_FORMAT ", duration=%"
G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP (bufout),
GST_BUFFER_DURATION (bufout));
ret = gst_pad_push (goom->srcpad, bufout);
goom->samples_consumed += samples_per_frame;
gst_adapter_flush (goom->adapter,
samples_per_frame * goom->channels * sizeof (gint16));
if (ret != GST_FLOW_OK)
break;
}
return ret;
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (goom, CORE, NEGOTIATION, (NULL),
("Format wasn't negotiated before chain function."));
gst_buffer_unref (bufin);
return GST_FLOW_NOT_NEGOTIATED;
}
no_format:
{
GST_ELEMENT_ERROR (goom, CORE, NEGOTIATION, (NULL),
("Could not negotiate format on source pad."));
gst_buffer_unref (bufin);
return GST_FLOW_ERROR;
}
}
static GstStateChangeReturn
gst_goom_change_state (GstElement * element, GstStateChange transition)
{
GstGoom *goom = GST_GOOM (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
goom->audio_basetime = GST_CLOCK_TIME_NONE;
gst_adapter_clear (goom->adapter);
goom->channels = 0;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "goom", GST_RANK_NONE, GST_TYPE_GOOM);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"goom",
"GOOM visualization filter",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)