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add gstsnapshot : drop a frame to a png file when the plugin recieved a signal or at a given frame

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Original commit message from CVS:
add gstsnapshot : drop a frame to a png file when the plugin recieved a signal or
at a given frame
This commit is contained in:
Jeremy Simon 2002-05-07 22:29:08 +00:00
parent dd3ddad5ec
commit 3c6a230219
4 changed files with 498 additions and 0 deletions
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9
configure.ac
View file

@ -572,6 +572,14 @@ GST_CHECK_FEATURE(SMOOTHWAVE, [smoothwave plugin], smoothwave, [
if test $HAVE_GTK = "yes"; then HAVE_SMOOTHWAVE=yes; fi;
])
dnl *** snapshot ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LIBPNG, true)
GST_CHECK_FEATURE(LIBPNG, [snapshot plugin], snapshot, [
GST_CHECK_LIBHEADER(LIBPNG, png, png_read_info, -lz, png.h, LIBPNG_LIBS="-lpng -lz")
AC_SUBST(LIBPNG_LIBS)
])
dnl *** tarkin ***
dnl for now the sources are included in the plugin
dnl and should be moved to ext-libs/ perhaps
@ -833,6 +841,7 @@ ext/sdl/Makefile
ext/shout/Makefile
ext/sidplay/Makefile
ext/smoothwave/Makefile
ext/snapshot/Makefile
ext/vorbis/Makefile
ext/tarkin/Makefile
ext/xmms/Makefile

10
ext/snapshot/Makefile.am Normal file
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@ -0,0 +1,10 @@
plugindir = $(libdir)/gst
plugin_LTLIBRARIES = libgstsnapshot.la
libgstsnapshot_la_SOURCES = gstsnapshot.c ../hermes/yuv2rgb.c ../hermes/yuv2yuv.c
libgstsnapshot_la_CFLAGS = $(GST_CFLAGS)
libgstsnapshot_la_LIBADD = $(GST_LIBS) $(LIBPNG_LIBS)
libgstsnapshot_la_LDFLAGS = @GST_PLUGIN_LDFLAGS@
noinst_HEADERS = gstsnapshot.h

396
ext/snapshot/gstsnapshot.c Normal file
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@ -0,0 +1,396 @@
/* 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.
*/
#include <string.h>
#include <inttypes.h>
#include "gstsnapshot.h"
#define MAX_HEIGHT 2048
static GstElementDetails snapshot_details = {
"snapshot",
"Filter/Effect",
"Dump a frame to a png file",
VERSION,
"Jeremy SIMON <jsimon13@yahoo.fr>",
"(C) 2002",
};
GST_PAD_TEMPLATE_FACTORY (snapshot_src_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"snapshot_src",
"video/raw",
"format", GST_PROPS_LIST (
GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("YUY2"))
),
"width", GST_PROPS_INT_RANGE(0, G_MAXINT),
"height", GST_PROPS_INT_RANGE(0, G_MAXINT)
)
)
GST_PAD_TEMPLATE_FACTORY (snapshot_sink_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"snapshot_src",
"video/raw",
"format", GST_PROPS_LIST (
GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("YUY2"))
),
"width", GST_PROPS_INT_RANGE(0, G_MAXINT),
"height", GST_PROPS_INT_RANGE(0, G_MAXINT)
)
)
/* Shot 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_class_init (GstShotClass *klass);
static void gst_snapshot_init (GstShot *snapshot);
static void gst_snapshot_chain (GstPad *pad, GstBuffer *buf);
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(GstShotClass), NULL, NULL, (GClassInitFunc)gst_snapshot_class_init,
NULL,
NULL,
sizeof(GstShot),
0,
(GInstanceInitFunc)gst_snapshot_init,
};
snapshot_type = g_type_register_static(GST_TYPE_ELEMENT, "GstShot", &snapshot_info, 0);
}
return snapshot_type;
}
static void
gst_snapshot_class_init (GstShotClass *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(GstShotClass, 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)
{
GstShot *snapshot;
snapshot = GST_SNAPSHOT( element );
snapshot->snapshot_asked=TRUE;
}
static gboolean
gst_snapshot_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstShot *filter;
GstCaps *from_caps, *to_caps;
filter = GST_SNAPSHOT (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_CONNECT_DELAYED;
gst_caps_get_int (caps, "width", &filter->width);
gst_caps_get_int (caps, "height", &filter->height);
gst_caps_get_fourcc_int (caps, "format", &filter->format);
filter->to_bpp = 24;
to_caps = GST_CAPS_NEW (
"snapshot_conversion",
"video/raw",
"format", GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB ")),
"width", GST_PROPS_INT( filter->width ),
"height", GST_PROPS_INT( filter->height ),
"red_mask", GST_PROPS_INT (0xFF0000),
"green_mask", GST_PROPS_INT (0x00FF00),
"blue_mask", GST_PROPS_INT (0x0000FF),
"bpp", GST_PROPS_INT( 24 )
);
switch ( filter->format )
{
case GST_MAKE_FOURCC('Y','U','Y','2'):
case GST_MAKE_FOURCC('I','4','2','0'):
from_caps = GST_CAPS_NEW (
"snapshot_from",
"video/raw",
"format", GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
"width", GST_PROPS_INT( filter->width ),
"height", GST_PROPS_INT( filter->height ),
"red_mask", GST_PROPS_INT (0xFF0000),
"green_mask", GST_PROPS_INT (0x00FF00),
"blue_mask", GST_PROPS_INT (0x0000FF),
"bpp", GST_PROPS_INT( 24 )
);
filter->converter = gst_colorspace_yuv2rgb_get_converter ( from_caps, to_caps );
break;
default :
break;
}
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_CONNECT_OK;
}
static void
gst_snapshot_init (GstShot *snapshot)
{
snapshot->sinkpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (snapshot_sink_factory), "sink");
gst_pad_set_connect_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_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, GstBuffer *buf)
{
GstShot *snapshot;
guchar *data, *data_to_convert, *buffer_i420, *data_converted;
gulong size,image_size;
GstBuffer *outbuf;
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 (0,"snapshot: have buffer of %d\n", GST_BUFFER_SIZE(buf));
outbuf = gst_buffer_new();
GST_BUFFER_DATA(outbuf) = g_malloc(GST_BUFFER_SIZE(buf));
GST_BUFFER_SIZE(outbuf) = GST_BUFFER_SIZE(buf);
snapshot->cur_frame++;
if ( snapshot->cur_frame == snapshot->frame || snapshot->snapshot_asked == TRUE )
{
snapshot->snapshot_asked = FALSE;
image_size = snapshot->width * snapshot->height;
data_converted = g_malloc ((image_size * (snapshot->to_bpp/8)) );
if ( snapshot->format == GST_MAKE_FOURCC('Y','U','Y','2') )
{
GST_DEBUG(0, "YUY2 => RGB\n");
buffer_i420 = g_malloc ((image_size * (snapshot->to_bpp/8)) );
gst_colorspace_yuy2_to_i420( data, buffer_i420, snapshot->width, snapshot->height);
data_to_convert = buffer_i420;
}
else
data_to_convert = data;
gst_colorspace_convert (snapshot->converter, data_to_convert, data_converted);
GST_INFO(0,"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_converted + (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 );
}
}
gst_pad_push(snapshot->srcpad,buf );
}
static void
gst_snapshot_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstShot *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)
{
GstShot *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 (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new("snapshot",GST_TYPE_SNAPSHOT,
&snapshot_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (snapshot_sink_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (snapshot_src_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"snapshot",
plugin_init
};

83
ext/snapshot/gstsnapshot.h Normal file
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@ -0,0 +1,83 @@
/* Gnome-Streamer
* 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.
*/
#ifndef __GST_SNAPSHOT_H__
#define __GST_SNAPSHOT_H__
#include <config.h>
#include <gst/gst.h>
#include <png.h>
#include "../hermes/yuv2rgb.h"
#include "../hermes/yuv2yuv.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_SNAPSHOT \
(gst_snapshot_get_type())
#define GST_SNAPSHOT(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SNAPSHOT,GstShot))
#define GST_SNAPSHOT_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SNAPSHOT,GstShot))
#define GST_IS_SNAPSHOT(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SNAPSHOT))
#define GST_IS_SNAPSHOT_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SNAPSHOT))
typedef struct _GstShot GstShot;
typedef struct _GstShotClass GstShotClass;
struct _GstShot {
GstElement element;
guint32 format;
gint width;
gint height;
gint to_bpp;
glong frame;
glong cur_frame;
const gchar *location;
gboolean snapshot_asked;
png_structp png_struct_ptr;
png_infop png_info_ptr;
GstColorSpaceConverter *converter;
GstPad *sinkpad,*srcpad;
};
struct _GstShotClass {
GstElementClass parent_class;
void (*snapshot) (GstElement *elem);
};
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_SNAPSHOT_H__ */