gstreamer/gst/videotestsrc/gstvideotestsrc.c

688 lines
19 KiB
C
Raw Normal View History

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 "gstvideotestsrc.h"
#include "videotestsrc.h"
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_LIBOIL
#include <liboil/liboil.h>
#endif
GST_DEBUG_CATEGORY (videotestsrc_debug);
#define GST_CAT_DEFAULT videotestsrc_debug
/* elementfactory information */
static GstElementDetails videotestsrc_details =
GST_ELEMENT_DETAILS ("Video test source",
"Source/Video",
"Creates a test video stream",
"David A. Schleef <ds@schleef.org>");
/* GstVideotestsrc signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_TYPE,
ARG_SYNC,
ARG_NUM_BUFFERS
/* FILL ME */
};
static GstCaps *capslist = NULL;
static void gst_videotestsrc_base_init (gpointer g_class);
static void gst_videotestsrc_class_init (GstVideotestsrcClass * klass);
static void gst_videotestsrc_init (GstVideotestsrc * videotestsrc);
static GstElementStateReturn gst_videotestsrc_change_state (GstElement *
element);
static void gst_videotestsrc_set_clock (GstElement * element, GstClock * clock);
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 GstData *gst_videotestsrc_get (GstPad * pad);
static const GstQueryType *gst_videotestsrc_get_query_types (GstPad * pad);
static gboolean gst_videotestsrc_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value);
static const GstEventMask *gst_videotestsrc_get_event_masks (GstPad * pad);
static gboolean gst_videotestsrc_handle_src_event (GstPad * pad,
GstEvent * event);
static GstElementClass *parent_class = NULL;
static GstCaps *gst_videotestsrc_get_capslist (void);
#if 0
static GstCaps *gst_videotestsrc_get_capslist_size (int width, int height,
double rate);
#endif
static GstPadTemplate *
gst_videotestsrc_src_template_factory (void)
{
return gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_videotestsrc_get_capslist ());
}
GType
gst_videotestsrc_get_type (void)
{
static GType videotestsrc_type = 0;
if (!videotestsrc_type) {
static const GTypeInfo videotestsrc_info = {
sizeof (GstVideotestsrcClass),
gst_videotestsrc_base_init,
NULL,
(GClassInitFunc) gst_videotestsrc_class_init,
NULL,
NULL,
sizeof (GstVideotestsrc),
0,
(GInstanceInitFunc) gst_videotestsrc_init,
};
videotestsrc_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstVideotestsrc",
&videotestsrc_info, 0);
}
return videotestsrc_type;
}
#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_videotestsrc_src_template_factory ());
}
static void
gst_videotestsrc_class_init (GstVideotestsrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TYPE,
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), ARG_SYNC,
g_param_spec_boolean ("sync", "Sync", "Synchronize to clock", TRUE,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_BUFFERS,
g_param_spec_int ("num-buffers", "num-buffers",
"Number of buffers to output before sending EOS", -1, G_MAXINT,
0, G_PARAM_READWRITE));
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_videotestsrc_set_property;
gobject_class->get_property = gst_videotestsrc_get_property;
gstelement_class->change_state = gst_videotestsrc_change_state;
gstelement_class->set_clock = gst_videotestsrc_set_clock;
GST_DEBUG_CATEGORY_INIT (videotestsrc_debug, "videotestsrc", 0,
"Video Test Source");
}
static void
gst_videotestsrc_set_clock (GstElement * element, GstClock * clock)
{
GstVideotestsrc *v;
v = GST_VIDEOTESTSRC (element);
gst_object_replace ((GstObject **) & v->clock, (GstObject *) clock);
}
static GstCaps *
gst_videotestsrc_src_fixate (GstPad * pad, const GstCaps * caps)
{
GstStructure *structure;
GstCaps *newcaps;
/* FIXME this function isn't very intelligent in choosing "good" caps */
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, "width", 320)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_int (structure, "height", 240)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_double (structure, "framerate",
30.0)) {
return newcaps;
}
/* failed to fixate */
gst_caps_free (newcaps);
return NULL;
}
static GstPadLinkReturn
gst_videotestsrc_src_link (GstPad * pad, const GstCaps * caps)
{
GstVideotestsrc *videotestsrc;
const GstStructure *structure;
GstPadLinkReturn ret;
videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (videotestsrc, "linking");
structure = gst_caps_get_structure (caps, 0);
videotestsrc->fourcc = paintinfo_find_by_structure (structure);
if (!videotestsrc->fourcc) {
g_critical ("videotestsrc format not found");
return GST_PAD_LINK_REFUSED;
}
ret = gst_structure_get_int (structure, "width", &videotestsrc->width);
ret &= gst_structure_get_int (structure, "height", &videotestsrc->height);
ret &= gst_structure_get_double (structure, "framerate", &videotestsrc->rate);
if (!ret)
return GST_PAD_LINK_REFUSED;
videotestsrc->bpp = videotestsrc->fourcc->bitspp;
GST_DEBUG_OBJECT (videotestsrc, "size %dx%d, %f fps", videotestsrc->width,
videotestsrc->height, videotestsrc->rate);
return GST_PAD_LINK_OK;
}
static void
gst_videotestsrc_src_unlink (GstPad * pad)
{
GstVideotestsrc *videotestsrc;
videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
}
static GstElementStateReturn
gst_videotestsrc_change_state (GstElement * element)
{
GstVideotestsrc *videotestsrc;
videotestsrc = GST_VIDEOTESTSRC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
videotestsrc->num_buffers_left = videotestsrc->num_buffers;
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
videotestsrc->timestamp_offset = 0;
videotestsrc->running_time = 0;
videotestsrc->n_frames = 0;
break;
case GST_STATE_READY_TO_NULL:
break;
}
return parent_class->change_state (element);
}
static GstCaps *
gst_videotestsrc_get_capslist (void)
{
return gst_caps_copy (capslist);
}
static void
generate_capslist (void)
{
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;
}
}
#if 0
static GstCaps *
gst_videotestsrc_get_capslist_size (int width, int height, double rate)
{
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", G_TYPE_INT, width,
"height", G_TYPE_INT, height, "framerate", G_TYPE_INT, rate, NULL);
gst_caps_append_structure (caps, structure);
}
return caps;
}
#endif
static GstCaps *
gst_videotestsrc_getcaps (GstPad * pad)
{
GstVideotestsrc *vts;
vts = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
return gst_videotestsrc_get_capslist ();
}
static void
gst_videotestsrc_init (GstVideotestsrc * videotestsrc)
{
videotestsrc->srcpad =
gst_pad_new_from_template (gst_videotestsrc_src_template_factory (),
"src");
gst_pad_set_getcaps_function (videotestsrc->srcpad, gst_videotestsrc_getcaps);
gst_pad_set_fixate_function (videotestsrc->srcpad,
gst_videotestsrc_src_fixate);
gst_element_add_pad (GST_ELEMENT (videotestsrc), videotestsrc->srcpad);
gst_pad_set_get_function (videotestsrc->srcpad, gst_videotestsrc_get);
gst_pad_set_link_function (videotestsrc->srcpad, gst_videotestsrc_src_link);
gst_pad_set_unlink_function (videotestsrc->srcpad,
gst_videotestsrc_src_unlink);
gst_pad_set_query_function (videotestsrc->srcpad, gst_videotestsrc_src_query);
gst_pad_set_query_type_function (videotestsrc->srcpad,
gst_videotestsrc_get_query_types);
gst_pad_set_event_mask_function (videotestsrc->srcpad,
gst_videotestsrc_get_event_masks);
gst_pad_set_event_function (videotestsrc->srcpad,
gst_videotestsrc_handle_src_event);
gst_videotestsrc_set_pattern (videotestsrc, GST_VIDEOTESTSRC_SMPTE);
videotestsrc->num_buffers = -1;
videotestsrc->num_buffers_left = -1;
videotestsrc->sync = TRUE;
videotestsrc->need_discont = FALSE;
videotestsrc->loop = FALSE;
videotestsrc->segment_start_frame = -1;
videotestsrc->segment_end_frame = -1;
videotestsrc->timestamp_offset = 0;
}
static const GstQueryType *
gst_videotestsrc_get_query_types (GstPad * pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_POSITION,
0,
};
return query_types;
}
static gboolean
gst_videotestsrc_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value)
{
gboolean res = FALSE;
GstVideotestsrc *videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
switch (type) {
case GST_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_TIME:
*value = videotestsrc->running_time;
res = TRUE;
break;
case GST_FORMAT_DEFAULT: /* frames */
*value = videotestsrc->n_frames;
res = TRUE;
break;
default:
break;
}
break;
default:
break;
}
return res;
}
static const GstEventMask *
gst_videotestsrc_get_event_masks (GstPad * pad)
{
static const GstEventMask src_event_masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
{0,}
};
return src_event_masks;
}
static gboolean
gst_videotestsrc_handle_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstVideotestsrc *videotestsrc;
gint64 new_n_frames;
GstClockTime new_running_time;
g_return_val_if_fail (pad != NULL, FALSE);
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
new_n_frames = videotestsrc->n_frames;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
/* since we don't do bookkeeping, we just assign a useful meaning
* to the time/frame relation after seeking based on current fps */
switch (GST_EVENT_SEEK_FORMAT (event)) {
case GST_FORMAT_TIME:
new_running_time = GST_EVENT_SEEK_OFFSET (event);
new_n_frames =
GST_EVENT_SEEK_OFFSET (event) * (double) videotestsrc->rate /
GST_SECOND;
videotestsrc->segment_start_frame = -1;
videotestsrc->segment_end_frame = -1;
break;
case GST_FORMAT_DEFAULT:
new_n_frames = GST_EVENT_SEEK_OFFSET (event);
new_running_time = GST_EVENT_SEEK_OFFSET (event) /
(double) videotestsrc->rate * GST_SECOND;
videotestsrc->segment_start_frame = -1;
videotestsrc->segment_end_frame = -1;
break;
default:
res = FALSE;
break;
}
break;
}
case GST_EVENT_SEEK_SEGMENT:
{
switch (GST_EVENT_SEEK_FORMAT (event)) {
case GST_FORMAT_TIME:
new_n_frames =
GST_EVENT_SEEK_OFFSET (event) * (double) videotestsrc->rate /
GST_SECOND;
videotestsrc->segment_start_frame = new_n_frames;
videotestsrc->segment_end_frame =
GST_EVENT_SEEK_ENDOFFSET (event) * (double) videotestsrc->rate /
GST_SECOND;
videotestsrc->loop =
GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
break;
case GST_FORMAT_DEFAULT:
new_n_frames = GST_EVENT_SEEK_OFFSET (event);
videotestsrc->segment_start_frame = new_n_frames;
videotestsrc->segment_end_frame = GST_EVENT_SEEK_ENDOFFSET (event);
videotestsrc->loop =
GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
break;
default:
res = FALSE;
break;
}
break;
}
default:
res = FALSE;
break;
}
if (videotestsrc->n_frames != new_n_frames) {
videotestsrc->n_frames = new_n_frames;
videotestsrc->need_discont = TRUE;
}
return res;
}
static GstData *
gst_videotestsrc_get (GstPad * pad)
{
GstVideotestsrc *videotestsrc;
gulong newsize;
GstBuffer *buf;
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
GST_LOG_OBJECT (videotestsrc, "get");
if (videotestsrc->fourcc == NULL) {
GST_ELEMENT_ERROR (videotestsrc, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before get function"));
return NULL;
}
if (videotestsrc->need_discont) {
GstClockTime ts = videotestsrc->timestamp_offset +
(videotestsrc->n_frames * GST_SECOND) / (double) videotestsrc->rate;
videotestsrc->need_discont = FALSE;
return GST_DATA (gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts,
NULL));
}
if ((videotestsrc->segment_end_frame != -1) &&
(videotestsrc->n_frames > videotestsrc->segment_end_frame)) {
if (videotestsrc->loop) {
return GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE));
} else {
gst_element_set_eos (GST_ELEMENT (videotestsrc));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
}
if (videotestsrc->num_buffers_left == 0) {
gst_element_set_eos (GST_ELEMENT (videotestsrc));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
} else {
if (videotestsrc->num_buffers_left > 0)
videotestsrc->num_buffers_left--;
}
newsize = gst_videotestsrc_get_size (videotestsrc, videotestsrc->width,
videotestsrc->height);
g_return_val_if_fail (newsize > 0, NULL);
GST_LOG_OBJECT (videotestsrc, "creating buffer of %ld bytes for %dx%d image",
newsize, videotestsrc->width, videotestsrc->height);
buf = gst_pad_alloc_buffer (pad, GST_BUFFER_OFFSET_NONE, newsize);
g_return_val_if_fail (GST_BUFFER_DATA (buf) != NULL, NULL);
videotestsrc->make_image (videotestsrc, (void *) GST_BUFFER_DATA (buf),
videotestsrc->width, videotestsrc->height);
GST_BUFFER_TIMESTAMP (buf) = videotestsrc->timestamp_offset +
videotestsrc->running_time;
GST_BUFFER_DURATION (buf) = GST_SECOND / (double) videotestsrc->rate;
if (videotestsrc->sync) {
/* FIXME this is not correct if we do QoS */
if (videotestsrc->clock) {
gst_element_wait (GST_ELEMENT (videotestsrc), GST_BUFFER_TIMESTAMP (buf));
}
}
videotestsrc->n_frames++;
videotestsrc->running_time += GST_BUFFER_DURATION (buf);
return GST_DATA (buf);
}
static void
gst_videotestsrc_set_pattern (GstVideotestsrc * videotestsrc, int pattern_type)
{
videotestsrc->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;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VIDEOTESTSRC (object));
videotestsrc = GST_VIDEOTESTSRC (object);
switch (prop_id) {
case ARG_TYPE:
gst_videotestsrc_set_pattern (videotestsrc, g_value_get_enum (value));
break;
case ARG_SYNC:
videotestsrc->sync = g_value_get_boolean (value);
break;
case ARG_NUM_BUFFERS:
videotestsrc->num_buffers = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_videotestsrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideotestsrc *videotestsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VIDEOTESTSRC (object));
videotestsrc = GST_VIDEOTESTSRC (object);
switch (prop_id) {
case ARG_TYPE:
g_value_set_enum (value, videotestsrc->type);
break;
case ARG_SYNC:
g_value_set_boolean (value, videotestsrc->sync);
break;
case ARG_NUM_BUFFERS:
g_value_set_int (value, videotestsrc->num_buffers);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
#ifdef HAVE_LIBOIL
oil_init ();
#endif
generate_capslist ();
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)