gstreamer/gst/videotestsrc/gstvideotestsrc.c
Thomas Vander Stichele 9e01408713 add more elements to the docs
Original commit message from CVS:
add more elements to the docs
2005-09-11 21:45:24 +00:00

476 lines
13 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2002> David A. Schleef <ds@schleef.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-videotestsrc
*
* <refsect2>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch -v videotestsrc pattern=snow ! ximagesink
* </programlisting>
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvideotestsrc.h"
#include "videotestsrc.h"
#include <string.h>
#include <stdlib.h>
#include <liboil/liboil.h>
#define USE_PEER_BUFFERALLOC
GST_DEBUG_CATEGORY (videotestsrc_debug);
#define GST_CAT_DEFAULT videotestsrc_debug
static GstElementDetails videotestsrc_details =
GST_ELEMENT_DETAILS ("Video test source",
"Source/Video",
"Creates a test video stream",
"David A. Schleef <ds@schleef.org>");
enum
{
PROP_0,
PROP_PATTERN,
PROP_TIMESTAMP_OFFSET,
/* FILL ME */
};
GST_BOILERPLATE (GstVideoTestSrc, gst_videotestsrc, GstPushSrc,
GST_TYPE_PUSH_SRC);
static void gst_videotestsrc_set_pattern (GstVideoTestSrc * videotestsrc,
int pattern_type);
static void gst_videotestsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_videotestsrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_videotestsrc_getcaps (GstBaseSrc * bsrc);
static gboolean gst_videotestsrc_setcaps (GstBaseSrc * bsrc, GstCaps * caps);
static gboolean gst_videotestsrc_negotiate (GstBaseSrc * bsrc);
static void gst_videotestsrc_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end);
static gboolean gst_videotestsrc_event (GstBaseSrc * bsrc, GstEvent * event);
static GstFlowReturn gst_videotestsrc_create (GstPushSrc * psrc,
GstBuffer ** buffer);
#define GST_TYPE_VIDEOTESTSRC_PATTERN (gst_videotestsrc_pattern_get_type ())
static GType
gst_videotestsrc_pattern_get_type (void)
{
static GType videotestsrc_pattern_type = 0;
static GEnumValue pattern_types[] = {
{GST_VIDEOTESTSRC_SMPTE, "smpte", "SMPTE 100% color bars"},
{GST_VIDEOTESTSRC_SNOW, "snow", "Random (television snow)"},
{GST_VIDEOTESTSRC_BLACK, "black", "100% Black"},
{0, NULL, NULL},
};
if (!videotestsrc_pattern_type) {
videotestsrc_pattern_type =
g_enum_register_static ("GstVideoTestSrcPattern", pattern_types);
}
return videotestsrc_pattern_type;
}
static void
gst_videotestsrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &videotestsrc_details);
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_videotestsrc_getcaps (NULL)));
}
static void
gst_videotestsrc_class_init (GstVideoTestSrcClass * klass)
{
GObjectClass *gobject_class;
GstBaseSrcClass *gstbasesrc_class;
GstPushSrcClass *gstpushsrc_class;
gobject_class = (GObjectClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gstpushsrc_class = (GstPushSrcClass *) klass;
gobject_class->set_property = gst_videotestsrc_set_property;
gobject_class->get_property = gst_videotestsrc_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PATTERN,
g_param_spec_enum ("pattern", "Pattern",
"Type of test pattern to generate", GST_TYPE_VIDEOTESTSRC_PATTERN, 1,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_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_videotestsrc_getcaps;
gstbasesrc_class->set_caps = gst_videotestsrc_setcaps;
gstbasesrc_class->negotiate = gst_videotestsrc_negotiate;
gstbasesrc_class->get_times = gst_videotestsrc_get_times;
gstbasesrc_class->event = gst_videotestsrc_event;
gstpushsrc_class->create = gst_videotestsrc_create;
}
static void
gst_videotestsrc_init (GstVideoTestSrc * videotestsrc,
GstVideoTestSrcClass * g_class)
{
gst_videotestsrc_set_pattern (videotestsrc, GST_VIDEOTESTSRC_SMPTE);
videotestsrc->segment_start_frame = -1;
videotestsrc->segment_end_frame = -1;
videotestsrc->timestamp_offset = 0;
}
static void
gst_videotestsrc_set_pattern (GstVideoTestSrc * videotestsrc, int pattern_type)
{
videotestsrc->pattern_type = pattern_type;
GST_DEBUG_OBJECT (videotestsrc, "setting pattern to %d", pattern_type);
switch (pattern_type) {
case GST_VIDEOTESTSRC_SMPTE:
videotestsrc->make_image = gst_videotestsrc_smpte;
break;
case GST_VIDEOTESTSRC_SNOW:
videotestsrc->make_image = gst_videotestsrc_snow;
break;
case GST_VIDEOTESTSRC_BLACK:
videotestsrc->make_image = gst_videotestsrc_black;
break;
default:
g_assert_not_reached ();
}
}
static void
gst_videotestsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoTestSrc *videotestsrc = GST_VIDEOTESTSRC (object);
switch (prop_id) {
case PROP_PATTERN:
gst_videotestsrc_set_pattern (videotestsrc, g_value_get_enum (value));
break;
case PROP_TIMESTAMP_OFFSET:
videotestsrc->timestamp_offset = g_value_get_int64 (value);
break;
default:
break;
}
}
static void
gst_videotestsrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoTestSrc *videotestsrc = GST_VIDEOTESTSRC (object);
switch (prop_id) {
case PROP_PATTERN:
g_value_set_enum (value, videotestsrc->pattern_type);
break;
case PROP_TIMESTAMP_OFFSET:
g_value_set_int64 (value, videotestsrc->timestamp_offset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* threadsafe because this gets called as the plugin is loaded */
static GstCaps *
gst_videotestsrc_getcaps (GstBaseSrc * unused)
{
static GstCaps *capslist = NULL;
if (!capslist) {
GstCaps *caps;
GstStructure *structure;
int i;
caps = gst_caps_new_empty ();
for (i = 0; i < n_fourccs; i++) {
structure = paint_get_structure (fourcc_list + i);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
gst_caps_append_structure (caps, structure);
}
capslist = caps;
}
return gst_caps_copy (capslist);
}
static gboolean
gst_videotestsrc_parse_caps (const GstCaps * caps,
gint * width, gint * height, gdouble * rate,
struct fourcc_list_struct **fourcc)
{
const GstStructure *structure;
GstPadLinkReturn ret;
GST_DEBUG ("parsing caps");
if (gst_caps_get_size (caps) < 1)
return FALSE;
structure = gst_caps_get_structure (caps, 0);
*fourcc = paintinfo_find_by_structure (structure);
if (!*fourcc) {
g_critical ("videotestsrc format not found");
return FALSE;
}
ret = gst_structure_get_int (structure, "width", width);
ret &= gst_structure_get_int (structure, "height", height);
ret &= gst_structure_get_double (structure, "framerate", rate);
return ret;
}
static gboolean
gst_videotestsrc_setcaps (GstBaseSrc * bsrc, GstCaps * caps)
{
gboolean res;
gint width, height;
gdouble rate;
struct fourcc_list_struct *fourcc;
GstVideoTestSrc *videotestsrc;
videotestsrc = GST_VIDEOTESTSRC (bsrc);
res = gst_videotestsrc_parse_caps (caps, &width, &height, &rate, &fourcc);
if (res) {
/* looks ok here */
videotestsrc->fourcc = fourcc;
videotestsrc->width = width;
videotestsrc->height = height;
videotestsrc->rate = rate;
videotestsrc->bpp = videotestsrc->fourcc->bitspp;
GST_DEBUG_OBJECT (videotestsrc, "size %dx%d, %f fps", videotestsrc->width,
videotestsrc->height, videotestsrc->rate);
}
return res;
}
static gboolean
gst_videotestsrc_negotiate (GstBaseSrc * bsrc)
{
GstCaps *caps;
GstCaps *temp;
gboolean result = FALSE;
/* get all possible caps on this link */
caps = gst_pad_get_allowed_caps (GST_BASE_SRC_PAD (bsrc));
temp = gst_caps_normalize (caps);
gst_caps_unref (caps);
caps = temp;
if (gst_caps_get_size (caps) > 0) {
GstStructure *structure;
/* pick the first one */
gst_caps_truncate (caps);
structure = gst_caps_get_structure (caps, 0);
gst_caps_structure_fixate_field_nearest_int (structure, "width", 320);
gst_caps_structure_fixate_field_nearest_int (structure, "height", 240);
gst_caps_structure_fixate_field_nearest_double (structure, "framerate",
30.0);
result = gst_pad_set_caps (GST_BASE_SRC_PAD (bsrc), caps);
gst_caps_unref (caps);
}
return result;
}
static void
gst_videotestsrc_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
*start = GST_CLOCK_TIME_NONE;
*end = GST_CLOCK_TIME_NONE;
}
static gboolean
gst_videotestsrc_event (GstBaseSrc * bsrc, GstEvent * event)
{
gboolean res = TRUE;
GstVideoTestSrc *videotestsrc;
gint64 new_n_frames;
videotestsrc = GST_VIDEOTESTSRC (bsrc);
new_n_frames = videotestsrc->n_frames;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
GstFormat format;
GstSeekType cur_type, stop_type;
GstSeekFlags flags;
gint64 cur, stop;
gst_event_parse_seek (event, NULL, &format, &flags, &cur_type, &cur,
&stop_type, &stop);
switch (format) {
case GST_FORMAT_TIME:
new_n_frames = cur * (double) videotestsrc->rate / GST_SECOND;
videotestsrc->segment_start_frame = new_n_frames;
videotestsrc->segment_end_frame =
stop * (double) videotestsrc->rate / GST_SECOND;
videotestsrc->segment = flags & GST_SEEK_FLAG_SEGMENT;
break;
case GST_FORMAT_DEFAULT:
new_n_frames = cur;
videotestsrc->segment_start_frame = new_n_frames;
videotestsrc->segment_end_frame = stop;
videotestsrc->segment = flags & GST_SEEK_FLAG_SEGMENT;
break;
default:
res = FALSE;
break;
}
break;
}
default:
res = FALSE;
break;
}
if (videotestsrc->n_frames != new_n_frames) {
videotestsrc->n_frames = new_n_frames;
}
return res;
}
static GstFlowReturn
gst_videotestsrc_create (GstPushSrc * psrc, GstBuffer ** buffer)
{
GstVideoTestSrc *videotestsrc;
gulong newsize;
GstBuffer *outbuf;
GstFlowReturn res;
videotestsrc = GST_VIDEOTESTSRC (psrc);
if (videotestsrc->fourcc == NULL)
goto not_negotiated;
newsize = gst_videotestsrc_get_size (videotestsrc, videotestsrc->width,
videotestsrc->height);
g_return_val_if_fail (newsize > 0, GST_FLOW_ERROR);
GST_LOG_OBJECT (videotestsrc, "creating buffer of %ld bytes for %dx%d image",
newsize, videotestsrc->width, videotestsrc->height);
#ifdef USE_PEER_BUFFERALLOC
res =
gst_pad_alloc_buffer (GST_BASE_SRC_PAD (psrc), GST_BUFFER_OFFSET_NONE,
newsize, GST_PAD_CAPS (GST_BASE_SRC_PAD (psrc)), &outbuf);
if (res != GST_FLOW_OK)
goto no_buffer;
#else
res = GST_FLOW_OK;
outbuf = gst_buffer_new_and_alloc (newsize);
if (outbuf == NULL)
goto no_buffer;
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (GST_BASE_SRC_PAD (psrc)));
#endif
videotestsrc->make_image (videotestsrc, (void *) GST_BUFFER_DATA (outbuf),
videotestsrc->width, videotestsrc->height);
GST_BUFFER_TIMESTAMP (outbuf) = videotestsrc->timestamp_offset +
videotestsrc->running_time;
GST_BUFFER_DURATION (outbuf) = GST_SECOND / (double) videotestsrc->rate;
videotestsrc->n_frames++;
videotestsrc->running_time += GST_BUFFER_DURATION (outbuf);
*buffer = outbuf;
return GST_FLOW_OK;
not_negotiated:
{
GST_ELEMENT_ERROR (videotestsrc, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before get function"));
return GST_FLOW_NOT_NEGOTIATED;
}
no_buffer:
{
return res;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
oil_init ();
GST_DEBUG_CATEGORY_INIT (videotestsrc_debug, "videotestsrc", 0,
"Video Test Source");
return gst_element_register (plugin, "videotestsrc", GST_RANK_NONE,
GST_TYPE_VIDEOTESTSRC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videotestsrc",
"Creates a test video stream",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)