mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-10-07 11:12:17 +00:00
Code Issues 1 Projects Releases Wiki Activity

clean up

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

163
ext/libpng/gstpngenc.c
View file

@ -2,7 +2,7 @@
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* *
* Filter: * Filter:
* Copyright (C) 2000 Donald A. Graft * Copyright (C) 2000 Donald A. Graft
* *
* This library is distributed in the hope that it will be useful, * This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
@ -20,15 +20,14 @@
#include <gst/gst.h> #include <gst/gst.h>
#include "gstpngenc.h" #include "gstpngenc.h"
#define MAX_HEIGHT 4096 #define MAX_HEIGHT 4096
gint frame=0;
GstElementDetails gst_pngenc_details = { GstElementDetails gst_pngenc_details = {
"", "",
"Filter/Video/Effect", "Filter/Video/Effect",
"LGPL", "LGPL",
"Apply a pngenc effect on video" "Encode a video frame to a .png image"
VERSION, VERSION,
"Jeremy SIMON <jsimon13@yahoo.fr>", "Jeremy SIMON <jsimon13@yahoo.fr>",
"(C) 2000 Donald Graft", "(C) 2000 Donald Graft",
@ -47,25 +46,20 @@ enum
ARG_0 ARG_0
}; };
static void gst_pngenc_class_init (GstPngEncClass * klass); static void gst_pngenc_class_init (GstPngEncClass *klass);
static void gst_pngenc_init (GstPngEnc * pngenc); static void gst_pngenc_init (GstPngEnc *pngenc);
static void gst_pngenc_set_property (GObject * object, guint prop_id, static void gst_pngenc_chain (GstPad *pad, GstBuffer *buf);
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 GstElementClass *parent_class = NULL;
static void user_error_fn(png_structp png_ptr, png_const_charp error_msg) static void user_error_fn (png_structp png_ptr, png_const_charp error_msg)
{ {
g_warning("%s", error_msg); g_warning("%s", error_msg);
} }
static void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg) static void user_warning_fn (png_structp png_ptr, png_const_charp warning_msg)
{ {
g_warning("%s", warning_msg); g_warning("%s", warning_msg);
} }
@ -87,13 +81,14 @@ GType gst_pngenc_get_type (void)
(GInstanceInitFunc) gst_pngenc_init, (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; return pngenc_type;
} }
static void static void
gst_pngenc_class_init (GstPngEncClass * klass) gst_pngenc_class_init (GstPngEncClass *klass)
{ {
GObjectClass *gobject_class; GObjectClass *gobject_class;
GstElementClass *gstelement_class; GstElementClass *gstelement_class;
@ -102,14 +97,11 @@ gst_pngenc_class_init (GstPngEncClass * klass)
gstelement_class = (GstElementClass *) klass; gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT); 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 static GstPadLinkReturn
gst_pngenc_sinkconnect (GstPad * pad, GstCaps * caps) gst_pngenc_sinklink (GstPad *pad, GstCaps *caps)
{ {
GstPngEnc *pngenc; GstPngEnc *pngenc;
@ -130,39 +122,32 @@ gst_pngenc_init (GstPngEnc * pngenc)
{ {
pngenc->sinkpad = gst_pad_new_from_template (pngenc_sink_template, "sink"); pngenc->sinkpad = gst_pad_new_from_template (pngenc_sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->sinkpad); gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->sinkpad);
pngenc->srcpad = gst_pad_new("src",GST_PAD_SRC); pngenc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->srcpad); gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->srcpad);
gst_pad_set_chain_function (pngenc->sinkpad, gst_pngenc_chain); 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); pngenc->png_struct_ptr = NULL;
if ( pngenc->png_struct_ptr == NULL ) pngenc->png_info_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) void user_flush_data (png_structp png_ptr)
{ {
GstPngEnc *pngenc; GstPngEnc *pngenc;
pngenc = (GstPngEnc *) png_get_io_ptr (png_ptr); pngenc = (GstPngEnc *) png_get_io_ptr (png_ptr);
gst_pad_push (pngenc->srcpad, GST_BUFFER (gst_event_new (GST_EVENT_FLUSH))); 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) void user_write_data (png_structp png_ptr, png_bytep data, png_uint_32 length)
{ {
GstBuffer *buffer; GstBuffer *buffer;
GstPngEnc *pngenc; GstPngEnc *pngenc;
pngenc = (GstPngEnc *) png_get_io_ptr (png_ptr); pngenc = (GstPngEnc *) png_get_io_ptr (png_ptr);
@ -170,34 +155,56 @@ GstPngEnc *pngenc;
GST_BUFFER_DATA (buffer) = g_memdup (data, length); GST_BUFFER_DATA (buffer) = g_memdup (data, length);
GST_BUFFER_SIZE (buffer) = length; GST_BUFFER_SIZE (buffer) = length;
if (pngenc->buffer_out) if (pngenc->buffer_out)
{ {
pngenc->buffer_out = gst_buffer_merge (pngenc->buffer_out, buffer); pngenc->buffer_out = gst_buffer_merge (pngenc->buffer_out, buffer);
gst_buffer_unref( buffer ); gst_buffer_unref (buffer);
} }
else else
pngenc->buffer_out = buffer; pngenc->buffer_out = buffer;
} }
static void static void
gst_pngenc_chain (GstPad * pad, GstBuffer * buf) gst_pngenc_chain (GstPad *pad, GstBuffer *buf)
{ {
GstPngEnc *pngenc; GstPngEnc *pngenc;
gint row_indice; gint row_index;
png_byte *row_pointers[ MAX_HEIGHT ]; png_byte *row_pointers[MAX_HEIGHT];
GstEvent *event;
if (frame != 30)
{
frame++;
gst_buffer_unref (buf);
return ;
}
pngenc = GST_PNGENC (gst_pad_get_parent (pad)); pngenc = GST_PNGENC (gst_pad_get_parent (pad));
pngenc->buffer_out = NULL; 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_compression_level (pngenc->png_struct_ptr, 9);
png_set_IHDR( png_set_IHDR(
@ -205,63 +212,33 @@ gst_pngenc_chain (GstPad * pad, GstBuffer * buf)
pngenc->png_info_ptr, pngenc->png_info_ptr,
pngenc->width, pngenc->width,
pngenc->height, pngenc->height,
pngenc->bpp/3, pngenc->bpp / 3,
PNG_COLOR_TYPE_RGB, PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT 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_index = 0; row_index < pngenc->height; row_index++)
row_pointers[row_index] = GST_BUFFER_DATA (buf) +
(pngenc->width * row_index * pngenc->bpp / 8);
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_info (pngenc->png_struct_ptr, pngenc->png_info_ptr);
png_write_image (pngenc->png_struct_ptr, row_pointers); png_write_image (pngenc->png_struct_ptr, row_pointers);
png_write_end (pngenc->png_struct_ptr, NULL); png_write_end (pngenc->png_struct_ptr, NULL);
gst_pad_push (pngenc->srcpad, pngenc->buffer_out );
user_flush_data (pngenc->png_struct_ptr); 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); png_destroy_info_struct (pngenc->png_struct_ptr, &pngenc->png_info_ptr);
frame++; png_destroy_write_struct (&pngenc->png_struct_ptr, (png_infopp) NULL);
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); 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;
}
}