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pngparse: Post VIDEO_CODEC tag

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This commit is contained in:
Sebastian Dröge 2013-12-16 10:24:28 +01:00
parent 6fbc101d19
commit 3faa8920ce
2 changed files with 37 additions and 1 deletions
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36
gst/videoparsers/gstpngparse.c
View file

@ -24,7 +24,8 @@
#include "gstpngparse.h"
#include <gst/base/gstbytereader.h>
#include <gst/base/base.h>
#include <gst/pbutils/pbutils.h>
#define PNG_SIGNATURE G_GUINT64_CONSTANT (0x89504E470D0A1A0A)
@ -50,6 +51,8 @@ G_DEFINE_TYPE (GstPngParse, gst_png_parse, GST_TYPE_BASE_PARSE);
static gboolean gst_png_parse_start (GstBaseParse * parse);
static GstFlowReturn gst_png_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize);
static GstFlowReturn gst_png_parse_pre_push_frame (GstBaseParse * parse,
GstBaseParseFrame * frame);
static void
gst_png_parse_class_init (GstPngParseClass * klass)
@ -70,6 +73,8 @@ gst_png_parse_class_init (GstPngParseClass * klass)
/* Override BaseParse vfuncs */
parse_class->start = GST_DEBUG_FUNCPTR (gst_png_parse_start);
parse_class->handle_frame = GST_DEBUG_FUNCPTR (gst_png_parse_handle_frame);
parse_class->pre_push_frame =
GST_DEBUG_FUNCPTR (gst_png_parse_pre_push_frame);
}
static void
@ -90,6 +95,8 @@ gst_png_parse_start (GstBaseParse * parse)
pngparse->width = 0;
pngparse->height = 0;
pngparse->sent_codec_tag = FALSE;
return TRUE;
}
@ -209,3 +216,30 @@ beach:
return ret;
}
static GstFlowReturn
gst_png_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstPngParse *pngparse = GST_PNG_PARSE (parse);
if (!pngparse->sent_codec_tag) {
GstTagList *taglist;
GstCaps *caps;
taglist = gst_tag_list_new_empty ();
/* codec tag */
caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (parse));
gst_pb_utils_add_codec_description_to_tag_list (taglist,
GST_TAG_VIDEO_CODEC, caps);
gst_caps_unref (caps);
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (pngparse),
gst_event_new_tag (taglist));
/* also signals the end of first-frame processing */
pngparse->sent_codec_tag = TRUE;
}
return GST_FLOW_OK;
}

2
gst/videoparsers/gstpngparse.h
View file

@ -49,6 +49,8 @@ struct _GstPngParse
guint width;
guint height;
gboolean sent_codec_tag;
};
struct _GstPngParseClass