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clean up
Original commit message from CVS: clean up
This commit is contained in:
Thomas Vander Stichele
parent
b720115fca
commit
46814db753
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@ -2,7 +2,7 @@
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* Filter:
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* Copyright (C) 2000 Donald A. Graft
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* Copyright (C) 2000 Donald A. Graft
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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@ -20,15 +20,14 @@
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#include <gst/gst.h>
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#include "gstpngenc.h"
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#define MAX_HEIGHT 4096
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#define MAX_HEIGHT 4096
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gint frame=0;
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GstElementDetails gst_pngenc_details = {
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"",
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"Filter/Video/Effect",
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"LGPL",
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"Apply a pngenc effect on video"
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"Encode a video frame to a .png image"
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VERSION,
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"Jeremy SIMON <jsimon13@yahoo.fr>",
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"(C) 2000 Donald Graft",
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@ -47,25 +46,20 @@ enum
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ARG_0
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};
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static void gst_pngenc_class_init (GstPngEncClass * klass);
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static void gst_pngenc_init (GstPngEnc * pngenc);
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static void gst_pngenc_class_init (GstPngEncClass *klass);
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static void gst_pngenc_init (GstPngEnc *pngenc);
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static void gst_pngenc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_pngenc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_pngenc_chain (GstPad * pad, GstBuffer * buf);
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static void gst_pngenc_chain (GstPad *pad, GstBuffer *buf);
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static GstElementClass *parent_class = NULL;
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static void user_error_fn(png_structp png_ptr, png_const_charp error_msg)
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static void user_error_fn (png_structp png_ptr, png_const_charp error_msg)
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{
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g_warning("%s", error_msg);
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}
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static void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg)
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static void user_warning_fn (png_structp png_ptr, png_const_charp warning_msg)
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{
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g_warning("%s", warning_msg);
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}
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@ -87,13 +81,14 @@ GType gst_pngenc_get_type (void)
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(GInstanceInitFunc) gst_pngenc_init,
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};
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pngenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstPngEnc", &pngenc_info, 0);
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pngenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstPngEnc",
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&pngenc_info, 0);
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}
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return pngenc_type;
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}
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static void
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gst_pngenc_class_init (GstPngEncClass * klass)
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gst_pngenc_class_init (GstPngEncClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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@ -102,14 +97,11 @@ gst_pngenc_class_init (GstPngEncClass * klass)
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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gobject_class->set_property = gst_pngenc_set_property;
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gobject_class->get_property = gst_pngenc_get_property;
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}
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static GstPadLinkReturn
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gst_pngenc_sinkconnect (GstPad * pad, GstCaps * caps)
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gst_pngenc_sinklink (GstPad *pad, GstCaps *caps)
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{
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GstPngEnc *pngenc;
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@ -130,39 +122,32 @@ gst_pngenc_init (GstPngEnc * pngenc)
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{
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pngenc->sinkpad = gst_pad_new_from_template (pngenc_sink_template, "sink");
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gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->sinkpad);
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pngenc->srcpad = gst_pad_new("src",GST_PAD_SRC);
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pngenc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
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gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->srcpad);
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gst_pad_set_chain_function (pngenc->sinkpad, gst_pngenc_chain);
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gst_pad_set_link_function (pngenc->sinkpad, gst_pngenc_sinkconnect);
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gst_pad_set_link_function (pngenc->sinkpad, gst_pngenc_sinklink);
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pngenc->png_struct_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, (png_voidp)NULL, user_error_fn, user_warning_fn);
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if ( pngenc->png_struct_ptr == NULL )
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g_warning ("Failed to initialize png structure");
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pngenc->png_info_ptr = png_create_info_struct (pngenc->png_struct_ptr);
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if (setjmp(pngenc->png_struct_ptr->jmpbuf))
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png_destroy_write_struct (&pngenc->png_struct_ptr, &pngenc->png_info_ptr);
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pngenc->png_struct_ptr = NULL;
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pngenc->png_info_ptr = NULL;
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}
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void user_flush_data (png_structp png_ptr)
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{
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GstPngEnc *pngenc;
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pngenc = (GstPngEnc *) png_get_io_ptr (png_ptr);
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gst_pad_push (pngenc->srcpad, GST_BUFFER (gst_event_new (GST_EVENT_FLUSH)));
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}
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void user_write_data (png_structp png_ptr, png_bytep data, png_uint_32 length)
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{
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GstBuffer *buffer;
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GstPngEnc *pngenc;
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GstBuffer *buffer;
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GstPngEnc *pngenc;
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pngenc = (GstPngEnc *) png_get_io_ptr (png_ptr);
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@ -170,34 +155,56 @@ GstPngEnc *pngenc;
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GST_BUFFER_DATA (buffer) = g_memdup (data, length);
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GST_BUFFER_SIZE (buffer) = length;
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if (pngenc->buffer_out)
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{
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if (pngenc->buffer_out)
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{
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pngenc->buffer_out = gst_buffer_merge (pngenc->buffer_out, buffer);
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gst_buffer_unref( buffer );
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gst_buffer_unref (buffer);
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}
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else
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pngenc->buffer_out = buffer;
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}
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static void
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gst_pngenc_chain (GstPad * pad, GstBuffer * buf)
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gst_pngenc_chain (GstPad *pad, GstBuffer *buf)
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{
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GstPngEnc *pngenc;
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gint row_indice;
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png_byte *row_pointers[ MAX_HEIGHT ];
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if (frame != 30)
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{
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frame++;
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gst_buffer_unref (buf);
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return ;
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}
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gint row_index;
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png_byte *row_pointers[MAX_HEIGHT];
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GstEvent *event;
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pngenc = GST_PNGENC (gst_pad_get_parent (pad));
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pngenc->buffer_out = NULL;
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if (!GST_PAD_IS_USABLE (pngenc->srcpad))
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{
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gst_buffer_unref (buf);
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return;
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}
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png_set_filter (pngenc->png_struct_ptr, 0, PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE);
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/* initialize png struct stuff */
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pngenc->png_struct_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING,
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(png_voidp) NULL, user_error_fn, user_warning_fn);
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/* FIXME: better error handling */
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if (pngenc->png_struct_ptr == NULL)
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g_warning ("Failed to initialize png structure");
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pngenc->png_info_ptr = png_create_info_struct (pngenc->png_struct_ptr);
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if (!pngenc->png_info_ptr)
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{
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png_destroy_read_struct (&(pngenc->png_struct_ptr), (png_infopp) NULL,
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(png_infopp) NULL);
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}
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/* non-0 return is from a longjmp inside of libpng */
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if (setjmp (pngenc->png_struct_ptr->jmpbuf) != 0)
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{
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GST_DEBUG (GST_CAT_PLUGIN_INFO, "returning from longjmp");
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png_destroy_write_struct (&pngenc->png_struct_ptr, &pngenc->png_info_ptr);
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return;
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}
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png_set_filter (pngenc->png_struct_ptr, 0,
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PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE);
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png_set_compression_level (pngenc->png_struct_ptr, 9);
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png_set_IHDR(
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@ -205,63 +212,33 @@ gst_pngenc_chain (GstPad * pad, GstBuffer * buf)
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pngenc->png_info_ptr,
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pngenc->width,
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pngenc->height,
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pngenc->bpp/3,
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pngenc->bpp / 3,
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PNG_COLOR_TYPE_RGB,
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PNG_INTERLACE_NONE,
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PNG_COMPRESSION_TYPE_DEFAULT,
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PNG_FILTER_TYPE_DEFAULT
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);
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png_set_write_fn (pngenc->png_struct_ptr, pngenc, (png_rw_ptr)user_write_data, user_flush_data);
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png_set_write_fn (pngenc->png_struct_ptr, pngenc,
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(png_rw_ptr) user_write_data, user_flush_data);
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for (row_index = 0; row_index < pngenc->height; row_index++)
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row_pointers[row_index] = GST_BUFFER_DATA (buf) +
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(pngenc->width * row_index * pngenc->bpp / 8);
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for (row_indice = 0; row_indice < pngenc->height; row_indice++)
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row_pointers[row_indice] = GST_BUFFER_DATA (buf) + (pngenc->width * row_indice * pngenc->bpp/8);
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png_write_info (pngenc->png_struct_ptr, pngenc->png_info_ptr);
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png_write_image (pngenc->png_struct_ptr, row_pointers);
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png_write_end (pngenc->png_struct_ptr, NULL);
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gst_pad_push (pngenc->srcpad, pngenc->buffer_out );
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user_flush_data (pngenc->png_struct_ptr);
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png_destroy_info_struct (pngenc->png_struct_ptr, &pngenc->png_info_ptr);
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png_destroy_write_struct (&pngenc->png_struct_ptr, (png_infopp)NULL);
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g_print ("Frame %d dumped\n", frame);
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frame++;
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png_destroy_info_struct (pngenc->png_struct_ptr, &pngenc->png_info_ptr);
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png_destroy_write_struct (&pngenc->png_struct_ptr, (png_infopp) NULL);
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gst_pad_push (pngenc->srcpad, pngenc->buffer_out);
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/* send NEW MEDIA event, since a frame has been pushed out */
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event = gst_event_new (GST_EVENT_NEW_MEDIA);
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gst_pad_send_event (pngenc->srcpad, event);
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gst_buffer_unref (buf);
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}
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static void
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gst_pngenc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstPngEnc *pngenc;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_PNGENC (object));
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pngenc = GST_PNGENC (object);
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switch (prop_id) {
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default:
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break;
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}
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}
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static void
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gst_pngenc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstPngEnc *pngenc;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_PNGENC (object));
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pngenc = GST_PNGENC (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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