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jpeg2000parse: initial support for JP2 format

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This is a simple way of supporting JP2 : we treat is as JPC, and throw
away header info.

https://bugzilla.gnome.org/show_bug.cgi?id=767546
This commit is contained in:
Aaron Boxer 2017-06-24 11:18:06 -04:00 committed by Sebastian Dröge
parent 85fbbc7a24
commit e10276a616
1 changed files with 7 additions and 4 deletions
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11
gst/videoparsers/gstjpeg2000parse.c
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@ -108,8 +108,7 @@ static GstStaticPadTemplate srctemplate =
static GstStaticPadTemplate sinktemplate =
GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/x-jpc;image/x-j2c")
);
GST_STATIC_CAPS ("image/jp2;image/x-jpc;image/x-j2c"));
#define parent_class gst_jpeg2000_parse_parent_class
G_DEFINE_TYPE (GstJPEG2000Parse, gst_jpeg2000_parse, GST_TYPE_BASE_PARSE);
@ -321,17 +320,21 @@ gst_jpeg2000_parse_handle_frame (GstBaseParse * parse,
/* if we can't get from caps, then try to parse */
if (jpeg2000parse->codec_format == GST_JPEG2000_PARSE_NO_CODEC) {
/* check for "jp2c" */
/* check for "jp2c" box */
/* both jp2 and j2c will be found with this scan, and both will be treated as j2c format */
j2c_box_id_offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
GST_MAKE_FOURCC ('j', 'p', '2', 'c'), 0,
gst_byte_reader_get_remaining (&reader));
parsed_j2c_4cc = TRUE;
is_j2c = j2c_box_id_offset != -1;
/* since we only support j2c and jpc at the moment, we can deduce the codec format */
jpeg2000parse->codec_format =
is_j2c ? GST_JPEG2000_PARSE_J2C : GST_JPEG2000_PARSE_JPC;
} else {
/* for now, just treat JP2 as J2C */
if (jpeg2000parse->codec_format == GST_JPEG2000_PARSE_JP2) {
jpeg2000parse->codec_format = GST_JPEG2000_PARSE_J2C;
}
is_j2c = jpeg2000parse->codec_format == GST_JPEG2000_PARSE_J2C;
}