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ffdec: ensure buffers have correct interlacedness in caps

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Whether a frame is interlaced or not is unknown at the time of
buffer allocation, so caps on the buffer in opaque will have
a previous frame's interlaced flag set. So if interlacedness
changes, we update the buffer (if any) caps with the correct
interlaced flag once we know.

https://bugzilla.gnome.org/show_bug.cgi?id=656155
This commit is contained in:
Vincent Penquerc'h 2011-08-29 15:18:39 +01:00 committed by Sebastian Dröge
parent 8bf3d5a2b7
commit d4d5e350d0
1 changed files with 22 additions and 0 deletions
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22
ext/ffmpeg/gstffmpegdec.c
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@ -1809,6 +1809,28 @@ gst_ffmpegdec_video_frame (GstFFMpegDec * ffmpegdec,
gst_ffmpegdec_negotiate (ffmpegdec, TRUE);
}
/* Whether a frame is interlaced or not is unknown at the time of
buffer allocation, so caps on the buffer in opaque will have
the previous frame's interlaced flag set. So if interlacedness
has changed since allocation, we update the buffer (if any)
caps now with the correct interlaced flag. */
if (ffmpegdec->picture->opaque != NULL) {
GstBuffer *buffer = ffmpegdec->picture->opaque;
if (GST_BUFFER_CAPS (buffer) && GST_PAD_CAPS (ffmpegdec->srcpad)) {
GstStructure *s = gst_caps_get_structure (GST_BUFFER_CAPS (buffer), 0);
gboolean interlaced;
gboolean found = gst_structure_get_boolean (s, "interlaced", &interlaced);
if (!found || (!!interlaced != !!ffmpegdec->format.video.interlaced)) {
GST_DEBUG_OBJECT (ffmpegdec,
"Buffer interlacing does not match pad, updating");
buffer = gst_buffer_make_metadata_writable (buffer);
gst_buffer_set_caps (buffer, GST_PAD_CAPS (ffmpegdec->srcpad));
ffmpegdec->picture->opaque = buffer;
}
}
}
/* check if we are dealing with a keyframe here, this will also check if we
* are dealing with B frames. */
iskeyframe = check_keyframe (ffmpegdec);