mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-19 00:01:23 +00:00
298 lines
7.3 KiB
C
298 lines
7.3 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
*
|
|
* Filter:
|
|
* Copyright (C) 2000 Donald A. Graft
|
|
*
|
|
* 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 <gst/gst.h>
|
|
#include "gstpng.h"
|
|
|
|
#define GST_TYPE_PNGENC \
|
|
(gst_pngenc_get_type())
|
|
#define GST_PNGENC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PNGENC,GstPngEnc))
|
|
#define GST_PNGENC_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstPngEnc))
|
|
#define GST_IS_PNGENC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PNGENC))
|
|
#define GST_IS_PNGENC_CLASS(obj) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PNGENC))
|
|
|
|
#define MAX_HEIGHT 4096
|
|
|
|
typedef struct _GstPngEnc GstPngEnc;
|
|
typedef struct _GstPngEncClass GstPngEncClass;
|
|
gint frame=0;
|
|
|
|
struct _GstPngEnc
|
|
{
|
|
GstElement element;
|
|
|
|
GstPad *sinkpad, *srcpad;
|
|
GstBuffer *buffer_out;
|
|
|
|
png_structp png_struct_ptr;
|
|
png_infop png_info_ptr;
|
|
|
|
gint width;
|
|
gint height;
|
|
gint bpp;
|
|
};
|
|
|
|
struct _GstPngEncClass
|
|
{
|
|
GstElementClass parent_class;
|
|
};
|
|
|
|
GstElementDetails gst_pngenc_details = {
|
|
"",
|
|
"Filter/Video/Effect",
|
|
"LGPL",
|
|
"Apply a pngenc effect on video"
|
|
VERSION,
|
|
"Jeremy SIMON <jsimon13@yahoo.fr>",
|
|
"(C) 2000 Donald Graft",
|
|
};
|
|
|
|
|
|
/* Filter signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum
|
|
{
|
|
ARG_0
|
|
};
|
|
|
|
static void gst_pngenc_class_init (GstPngEncClass * klass);
|
|
static void gst_pngenc_init (GstPngEnc * pngenc);
|
|
|
|
static void gst_pngenc_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
static void gst_pngenc_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
|
|
static void gst_pngenc_chain (GstPad * pad, GstBuffer * buf);
|
|
|
|
static GstElementClass *parent_class = NULL;
|
|
|
|
|
|
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_pngenc_get_type (void)
|
|
{
|
|
static GType pngenc_type = 0;
|
|
|
|
if (!pngenc_type) {
|
|
static const GTypeInfo pngenc_info = {
|
|
sizeof (GstPngEncClass), NULL,
|
|
NULL,
|
|
(GClassInitFunc) gst_pngenc_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (GstPngEnc),
|
|
0,
|
|
(GInstanceInitFunc) gst_pngenc_init,
|
|
};
|
|
|
|
pngenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstPngEnc", &pngenc_info, 0);
|
|
}
|
|
return pngenc_type;
|
|
}
|
|
|
|
static void
|
|
gst_pngenc_class_init (GstPngEncClass * 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->set_property = gst_pngenc_set_property;
|
|
gobject_class->get_property = gst_pngenc_get_property;
|
|
}
|
|
|
|
|
|
static GstPadConnectReturn
|
|
gst_pngenc_sinkconnect (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstPngEnc *pngenc;
|
|
|
|
pngenc = GST_PNGENC (gst_pad_get_parent (pad));
|
|
|
|
if (!GST_CAPS_IS_FIXED (caps))
|
|
return GST_PAD_CONNECT_DELAYED;
|
|
|
|
gst_caps_get_int (caps, "width", &pngenc->width);
|
|
gst_caps_get_int (caps, "height", &pngenc->height);
|
|
gst_caps_get_int (caps, "bpp", &pngenc->bpp);
|
|
|
|
return gst_pad_try_set_caps (pngenc->srcpad, caps);
|
|
}
|
|
|
|
static void
|
|
gst_pngenc_init (GstPngEnc * pngenc)
|
|
{
|
|
pngenc->sinkpad = gst_pad_new_from_template (gst_png_sink_factory (), "sink");
|
|
gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->sinkpad);
|
|
|
|
pngenc->srcpad = gst_pad_new_from_template (gst_png_src_factory (), "src");
|
|
gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->srcpad);
|
|
|
|
gst_pad_set_chain_function (pngenc->sinkpad, gst_pngenc_chain);
|
|
gst_pad_set_connect_function (pngenc->sinkpad, gst_pngenc_sinkconnect);
|
|
|
|
pngenc->png_struct_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, user_error_fn, user_warning_fn);
|
|
if ( pngenc->png_struct_ptr == NULL )
|
|
g_warning( "Failed to initialize png structure");
|
|
|
|
pngenc->png_info_ptr = png_create_info_struct( pngenc->png_struct_ptr );
|
|
|
|
if (setjmp( pngenc->png_struct_ptr->jmpbuf))
|
|
png_destroy_write_struct(&pngenc->png_struct_ptr, &pngenc->png_info_ptr);
|
|
|
|
}
|
|
|
|
void user_flush_data(png_structp png_ptr)
|
|
{
|
|
GstPngEnc *pngenc;
|
|
|
|
g_print("FLUSH\n");
|
|
|
|
pngenc = (GstPngEnc *) png_get_io_ptr(png_ptr);
|
|
|
|
gst_pad_push (pngenc->srcpad, GST_BUFFER (gst_event_new (GST_EVENT_FLUSH)));
|
|
}
|
|
|
|
void user_write_data(png_structp png_ptr, png_bytep data, png_uint_32 length)
|
|
{
|
|
GstBuffer *buffer;
|
|
GstPngEnc *pngenc;
|
|
|
|
pngenc = (GstPngEnc *) png_get_io_ptr(png_ptr);
|
|
|
|
buffer = gst_buffer_new();
|
|
GST_BUFFER_DATA (buffer) = g_memdup( data, length );
|
|
GST_BUFFER_SIZE (buffer) = length;
|
|
|
|
if ( pngenc->buffer_out )
|
|
{
|
|
pngenc->buffer_out = gst_buffer_merge( pngenc->buffer_out, buffer );
|
|
gst_buffer_unref( buffer );
|
|
}
|
|
else
|
|
pngenc->buffer_out = buffer;
|
|
}
|
|
|
|
static void
|
|
gst_pngenc_chain (GstPad * pad, GstBuffer * buf)
|
|
{
|
|
GstPngEnc *pngenc;
|
|
gint row_indice;
|
|
png_byte *row_pointers[ MAX_HEIGHT ];
|
|
|
|
if ( frame != 300 )
|
|
{
|
|
frame++;
|
|
gst_buffer_unref (buf);
|
|
return ;
|
|
}
|
|
|
|
pngenc = GST_PNGENC (gst_pad_get_parent (pad));
|
|
|
|
pngenc->buffer_out = NULL;
|
|
|
|
png_set_filter( pngenc->png_struct_ptr, 0, PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE );
|
|
png_set_compression_level( pngenc->png_struct_ptr, 9);
|
|
|
|
png_set_IHDR(
|
|
pngenc->png_struct_ptr,
|
|
pngenc->png_info_ptr,
|
|
pngenc->width,
|
|
pngenc->height,
|
|
pngenc->bpp/3,
|
|
PNG_COLOR_TYPE_RGB,
|
|
PNG_INTERLACE_NONE,
|
|
PNG_COMPRESSION_TYPE_DEFAULT,
|
|
PNG_FILTER_TYPE_DEFAULT
|
|
);
|
|
|
|
png_set_write_fn(pngenc->png_struct_ptr, pngenc, (png_rw_ptr)user_write_data, user_flush_data);
|
|
|
|
for ( row_indice = 0; row_indice < pngenc->height; row_indice++ )
|
|
row_pointers[row_indice] = GST_BUFFER_DATA(buf) + (pngenc->width * row_indice * pngenc->bpp/8 );
|
|
|
|
png_write_info( pngenc->png_struct_ptr, pngenc->png_info_ptr );
|
|
png_write_image( pngenc->png_struct_ptr, row_pointers );
|
|
png_write_end( pngenc->png_struct_ptr, NULL );
|
|
png_destroy_info_struct ( pngenc->png_struct_ptr, &pngenc->png_info_ptr );
|
|
png_destroy_write_struct( &pngenc->png_struct_ptr, (png_infopp)NULL );
|
|
|
|
gst_pad_push (pngenc->srcpad, pngenc->buffer_out );
|
|
|
|
g_print("Frame %d dumped\n", frame );
|
|
frame++;
|
|
|
|
gst_buffer_unref (buf);
|
|
}
|
|
|
|
static void
|
|
gst_pngenc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstPngEnc *pngenc;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
g_return_if_fail (GST_IS_PNGENC (object));
|
|
|
|
pngenc = GST_PNGENC (object);
|
|
|
|
switch (prop_id) {
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_pngenc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstPngEnc *pngenc;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
g_return_if_fail (GST_IS_PNGENC (object));
|
|
|
|
pngenc = GST_PNGENC (object);
|
|
|
|
switch (prop_id) {
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|