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jpegparse: avi1 tag can be progressive

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AVI1 tag in APP0 is trivalue: 0 not interleaved, 1 odd, 2 even.

So if avi1 is zero then the frame is progressive.

Also, this patch adds a couple log messages.

Fixes: #3414
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6445>
This commit is contained in:
Víctor Manuel Jáquez Leal 2024-03-26 15:32:24 +01:00 committed by GStreamer Marge Bot
parent 46355e31d7
commit ababe13f1c
1 changed files with 5 additions and 3 deletions
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8
subprojects/gst-plugins-bad/gst/jpegformat/gstjpegparse.c
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@ -405,6 +405,7 @@ gst_jpeg_parse_sof (GstJpegParse * parse, GstJpegSegment * seg)
&& parse->height < ((parse->orig_height * 3) / 4)) {
parse->interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
} else if (parse->avid) {
/* if no container info, let's suppose it doubles its height */
if (parse->orig_height == 0)
parse->orig_height = 2 * hdr.height;
parse->interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
@ -531,11 +532,11 @@ gst_jpeg_parse_app0 (GstJpegParse * parse, GstJpegSegment * seg)
if (!gst_byte_reader_get_uint8 (&reader, &unit))
return FALSE;
parse->avid = TRUE;
parse->field = unit == 1 ? 0 : 1;
parse->avid = (unit > 0); /* otherwise is not interleaved */
/* TODO: update caps for interlaced MJPEG */
GST_DEBUG_OBJECT (parse, "MJPEG interleaved field: %d", unit);
GST_DEBUG_OBJECT (parse, "MJPEG interleaved field: %s", unit == 0 ?
"not interleaved" : unit % 2 ? "Odd" : "Even");
return TRUE;
}
@ -820,6 +821,7 @@ gst_jpeg_parse_finish_frame (GstJpegParse * parse, GstBaseParseFrame * frame,
GST_WARNING_OBJECT (parse, "Potentially invalid picture");
}
GST_TRACE_OBJECT (parse, "Finish frame %" GST_PTR_FORMAT, frame->buffer);
ret = gst_base_parse_finish_frame (bparse, frame, size);
gst_jpeg_parse_reset (parse);