gstreamer/ext/snapshot/gstsnapshot.c
Ronald S. Bultje d769377619 ext/snapshot/: This has to be a joke... Snapshot should be connected to a tee, colorspace element before it and EOS a...
Original commit message from CVS:
2004-01-15  Ronald Bultje  <rbultje@ronald.bitfreak.net>

* ext/snapshot/Makefile.am:
* ext/snapshot/gstsnapshot.c: (gst_snapshot_sinkconnect),
(gst_snapshot_chain):
* ext/snapshot/gstsnapshot.h:
This has to be a joke... Snapshot should be connected to a tee,
colorspace element before it and EOS after that, where the other
src of the tee receives normal data.
The current way is *wrong*.
2004-01-15 11:21:24 +00:00

341 lines
9.4 KiB
C

/* 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 <string.h>
#include <inttypes.h>
#include "gstsnapshot.h"
#include <gst/video/video.h>
#define MAX_HEIGHT 2048
/* elementfactory information */
static GstElementDetails snapshot_details = {
"snapshot",
"Filter/Editor/Video",
"Dump a frame to a png file",
"Jeremy SIMON <jsimon13@yahoo.fr>",
};
static GstStaticPadTemplate snapshot_src_factory =
GST_STATIC_PAD_TEMPLATE (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGR)
);
static GstStaticPadTemplate snapshot_sink_factory =
GST_STATIC_PAD_TEMPLATE (
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGR)
);
/* Snapshot signals and args */
enum {
/* FILL ME */
SNAPSHOT_SIGNAL,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_FRAME,
ARG_LOCATION
};
static GType gst_snapshot_get_type (void);
static void gst_snapshot_base_init (gpointer g_class);
static void gst_snapshot_class_init (GstSnapshotClass *klass);
static void gst_snapshot_init (GstSnapshot *snapshot);
static void gst_snapshot_chain (GstPad *pad, GstData *_data);
static void gst_snapshot_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_snapshot_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void snapshot_handler(GstElement *element);
static GstElementClass *parent_class = NULL;
static guint gst_snapshot_signals[LAST_SIGNAL] = { 0 };
static void user_error_fn(png_structp png_ptr, png_const_charp error_msg)
{
g_warning("%s", error_msg);
}
static void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg)
{
g_warning("%s", warning_msg);
}
GType
gst_snapshot_get_type (void)
{
static GType snapshot_type = 0;
if (!snapshot_type) {
static const GTypeInfo snapshot_info = {
sizeof(GstSnapshotClass),
gst_snapshot_base_init,
NULL,
(GClassInitFunc)gst_snapshot_class_init,
NULL,
NULL,
sizeof(GstSnapshot),
0,
(GInstanceInitFunc)gst_snapshot_init,
};
snapshot_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSnapshot", &snapshot_info, 0);
}
return snapshot_type;
}
static void
gst_snapshot_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&snapshot_sink_factory));
gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&snapshot_src_factory));
gst_element_class_set_details (element_class, &snapshot_details);
}
static void
gst_snapshot_class_init (GstSnapshotClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAME,
g_param_spec_long("frame","frame","frame",
0, G_MAXLONG, 0, G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_LOCATION,
g_param_spec_string("location","location","location",
0,G_PARAM_READWRITE));
gst_snapshot_signals[SNAPSHOT_SIGNAL] =
g_signal_new("snapshot", G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET(GstSnapshotClass, snapshot),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
klass->snapshot = snapshot_handler;
gobject_class->set_property = gst_snapshot_set_property;
gobject_class->get_property = gst_snapshot_get_property;
}
static void
snapshot_handler(GstElement *element)
{
GstSnapshot *snapshot;
snapshot = GST_SNAPSHOT( element );
snapshot->snapshot_asked=TRUE;
}
static gboolean
gst_snapshot_sinkconnect (GstPad *pad, const GstCaps *caps)
{
GstSnapshot *filter;
gdouble fps;
GstStructure *structure;
filter = GST_SNAPSHOT (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &filter->width);
gst_structure_get_int (structure, "height", &filter->height);
gst_structure_get_double (structure, "framerate", &fps);
gst_structure_get_fourcc (structure, "format", &filter->format);
filter->to_bpp = 24;
filter->png_struct_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, user_error_fn, user_warning_fn);
if ( filter->png_struct_ptr == NULL )
g_warning( "Failed to initialize png structure");
filter->png_info_ptr = png_create_info_struct( filter->png_struct_ptr );
if (setjmp( filter->png_struct_ptr->jmpbuf))
png_destroy_write_struct(&filter->png_struct_ptr, &filter->png_info_ptr);
gst_pad_try_set_caps (filter->srcpad, caps);
return GST_PAD_LINK_OK;
}
static void
gst_snapshot_init (GstSnapshot *snapshot)
{
snapshot->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&snapshot_sink_factory), "sink");
gst_pad_set_link_function (snapshot->sinkpad, gst_snapshot_sinkconnect);
gst_pad_set_chain_function (snapshot->sinkpad, gst_snapshot_chain);
gst_element_add_pad (GST_ELEMENT (snapshot), snapshot->sinkpad);
snapshot->srcpad = gst_pad_new_from_template (gst_static_pad_template_get (&snapshot_src_factory), "src");
gst_element_add_pad (GST_ELEMENT (snapshot), snapshot->srcpad);
snapshot->cur_frame = 0;
snapshot->frame=-1;
snapshot->snapshot_asked=FALSE;
}
static void
gst_snapshot_chain (GstPad *pad, GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstSnapshot *snapshot;
guchar *data;
gulong size;
gint i;
png_byte *row_pointers[ MAX_HEIGHT ];
FILE *fp;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
g_return_if_fail(buf != NULL);
snapshot = GST_SNAPSHOT (GST_OBJECT_PARENT (pad));
data = GST_BUFFER_DATA(buf);
size = GST_BUFFER_SIZE(buf);
GST_DEBUG ("snapshot: have buffer of %d\n", GST_BUFFER_SIZE(buf));
snapshot->cur_frame++;
if (snapshot->cur_frame == snapshot->frame ||
snapshot->snapshot_asked == TRUE )
{
snapshot->snapshot_asked = FALSE;
GST_INFO ("dumpfile : %s\n", snapshot->location );
fp = fopen( snapshot->location, "wb" );
if ( fp == NULL )
g_warning(" Can not open %s\n", snapshot->location );
else
{
png_set_filter( snapshot->png_struct_ptr, 0, PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE );
png_init_io(snapshot->png_struct_ptr, fp);
png_set_compression_level( snapshot->png_struct_ptr, 9);
png_set_IHDR(
snapshot->png_struct_ptr,
snapshot->png_info_ptr,
snapshot->width,
snapshot->height,
snapshot->to_bpp/3,
PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT
);
for ( i = 0; i < snapshot->height; i++ )
row_pointers[i] = data + (snapshot->width * i * snapshot->to_bpp/8 );
png_write_info( snapshot->png_struct_ptr, snapshot->png_info_ptr );
png_write_image( snapshot->png_struct_ptr, row_pointers );
png_write_end( snapshot->png_struct_ptr, NULL );
png_destroy_info_struct ( snapshot->png_struct_ptr, &snapshot->png_info_ptr );
png_destroy_write_struct( &snapshot->png_struct_ptr, (png_infopp)NULL );
fclose( fp );
g_signal_emit (G_OBJECT (snapshot),
gst_snapshot_signals[SNAPSHOT_SIGNAL], 0);
}
}
gst_pad_push(snapshot->srcpad,GST_DATA (buf ));
}
static void
gst_snapshot_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstSnapshot *snapshot;
g_return_if_fail(GST_IS_SNAPSHOT(object));
snapshot = GST_SNAPSHOT(object);
switch (prop_id) {
case ARG_LOCATION:
snapshot->location = g_strdup(g_value_get_string (value));
break;
case ARG_FRAME:
snapshot->frame = g_value_get_long(value);
break;
default:
break;
}
}
static void
gst_snapshot_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstSnapshot *snapshot;
g_return_if_fail(GST_IS_SNAPSHOT(object));
snapshot = GST_SNAPSHOT(object);
switch (prop_id) {
case ARG_LOCATION:
g_value_set_string(value, snapshot->location);
break;
case ARG_FRAME:
g_value_set_long(value, snapshot->frame);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin *plugin)
{
if (!gst_element_register (plugin, "snapshot", GST_RANK_NONE, GST_TYPE_SNAPSHOT))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"snapshot",
"Dump a frame to a png file",
plugin_init,
VERSION,
"LGPL",
GST_PACKAGE,
GST_ORIGIN)