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Code Issues 1 Projects Releases Wiki Activity

clean up

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Original commit message from CVS:
clean up
This commit is contained in:
Thomas Vander Stichele 2003-01-20 23:32:39 +00:00
parent b720115fca
commit 46814db753
1 changed files with 70 additions and 93 deletions
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117
ext/libpng/gstpngenc.c
View file

@ -22,13 +22,12 @@
#define MAX_HEIGHT 4096
gint frame=0;
GstElementDetails gst_pngenc_details = {
"",
"Filter/Video/Effect",
"LGPL",
"Apply a pngenc effect on video"
"Encode a video frame to a .png image"
VERSION,
"Jeremy SIMON <jsimon13@yahoo.fr>",
"(C) 2000 Donald Graft",
@ -50,11 +49,6 @@ enum
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;
@ -87,7 +81,8 @@ GType gst_pngenc_get_type (void)
(GInstanceInitFunc) gst_pngenc_init,
};
pngenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstPngEnc", &pngenc_info, 0);
pngenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstPngEnc",
&pngenc_info, 0);
}
return pngenc_type;
}
@ -102,14 +97,11 @@ gst_pngenc_class_init (GstPngEncClass * 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 GstPadLinkReturn
gst_pngenc_sinkconnect (GstPad * pad, GstCaps * caps)
gst_pngenc_sinklink (GstPad *pad, GstCaps *caps)
{
GstPngEnc *pngenc;
@ -135,20 +127,13 @@ gst_pngenc_init (GstPngEnc * pngenc)
gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->srcpad);
gst_pad_set_chain_function (pngenc->sinkpad, gst_pngenc_chain);
gst_pad_set_link_function (pngenc->sinkpad, gst_pngenc_sinkconnect);
gst_pad_set_link_function (pngenc->sinkpad, gst_pngenc_sinklink);
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);
pngenc->png_struct_ptr = NULL;
pngenc->png_info_ptr = NULL;
}
void user_flush_data (png_structp png_ptr)
{
GstPngEnc *pngenc;
@ -183,21 +168,43 @@ static void
gst_pngenc_chain (GstPad *pad, GstBuffer *buf)
{
GstPngEnc *pngenc;
gint row_indice;
gint row_index;
png_byte *row_pointers[MAX_HEIGHT];
if (frame != 30)
{
frame++;
gst_buffer_unref (buf);
return ;
}
GstEvent *event;
pngenc = GST_PNGENC (gst_pad_get_parent (pad));
pngenc->buffer_out = NULL;
if (!GST_PAD_IS_USABLE (pngenc->srcpad))
{
gst_buffer_unref (buf);
return;
}
png_set_filter (pngenc->png_struct_ptr, 0, PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE);
/* initialize png struct stuff */
pngenc->png_struct_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING,
(png_voidp) NULL, user_error_fn, user_warning_fn);
/* FIXME: better error handling */
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 (!pngenc->png_info_ptr)
{
png_destroy_read_struct (&(pngenc->png_struct_ptr), (png_infopp) NULL,
(png_infopp) NULL);
}
/* non-0 return is from a longjmp inside of libpng */
if (setjmp (pngenc->png_struct_ptr->jmpbuf) != 0)
{
GST_DEBUG (GST_CAT_PLUGIN_INFO, "returning from longjmp");
png_destroy_write_struct (&pngenc->png_struct_ptr, &pngenc->png_info_ptr);
return;
}
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(
@ -212,56 +219,26 @@ gst_pngenc_chain (GstPad * pad, GstBuffer * buf)
PNG_FILTER_TYPE_DEFAULT
);
png_set_write_fn (pngenc->png_struct_ptr, pngenc, (png_rw_ptr)user_write_data, user_flush_data);
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);
for (row_index = 0; row_index < pngenc->height; row_index++)
row_pointers[row_index] = GST_BUFFER_DATA (buf) +
(pngenc->width * row_index * 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);
gst_pad_push (pngenc->srcpad, pngenc->buffer_out );
user_flush_data (pngenc->png_struct_ptr);
png_destroy_info_struct (pngenc->png_struct_ptr, &pngenc->png_info_ptr);
png_destroy_write_struct (&pngenc->png_struct_ptr, (png_infopp) NULL);
g_print ("Frame %d dumped\n", frame);
frame++;
gst_pad_push (pngenc->srcpad, pngenc->buffer_out);
/* send NEW MEDIA event, since a frame has been pushed out */
event = gst_event_new (GST_EVENT_NEW_MEDIA);
gst_pad_send_event (pngenc->srcpad, event);
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;
}
}