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avviddec: discard unused input frames

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... to avoid these piling up in list of pending frames.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=693772
This commit is contained in:
Mark Nauwelaerts 2013-11-26 20:57:37 +01:00
parent 2ec4008ea5
commit fa5865c0cd
1 changed files with 44 additions and 0 deletions
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44
ext/libav/gstavviddec.c
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@ -575,6 +575,11 @@ gst_ffmpegviddec_get_buffer (AVCodecContext * context, AVFrame * picture)
if (G_UNLIKELY (frame == NULL))
goto no_frame;
/* now it has a buffer allocated, so it is real and will also
* be _released */
GST_VIDEO_CODEC_FRAME_FLAG_UNSET (frame,
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
if (G_UNLIKELY (frame->output_buffer != NULL))
goto duplicate_frame;
@ -1252,6 +1257,41 @@ gst_ffmpegviddec_video_frame (GstFFMpegVidDec * ffmpegdec,
GST_VIDEO_BUFFER_FLAG_INTERLACED);
}
/* cleaning time */
/* so we decoded this frame, frames preceding it in decoding order
* that still do not have a buffer allocated seem rather useless,
* and can be discarded, due to e.g. misparsed bogus frame
* or non-keyframe in skipped decoding, ...
* In any case, not likely to be seen again, so discard those,
* before they pile up and/or mess with timestamping */
{
GList *l, *ol;
GstVideoDecoder *dec = GST_VIDEO_DECODER (ffmpegdec);
gboolean old = TRUE;
ol = l = gst_video_decoder_get_frames (dec);
while (l) {
GstVideoCodecFrame *tmp = l->data;
if (tmp == frame)
old = FALSE;
if (old && GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY (tmp)) {
GST_LOG_OBJECT (dec,
"discarding ghost frame %p (#%d) PTS:%" GST_TIME_FORMAT " DTS:%"
GST_TIME_FORMAT, tmp, tmp->system_frame_number,
GST_TIME_ARGS (tmp->pts), GST_TIME_ARGS (tmp->dts));
/* drop extra ref and remove from frame list */
gst_video_decoder_release_frame (dec, tmp);
} else {
/* drop extra ref we got */
gst_video_codec_frame_unref (tmp);
}
l = l->next;
}
g_list_free (ol);
}
*ret =
gst_video_decoder_finish_frame (GST_VIDEO_DECODER (ffmpegdec), out_frame);
@ -1387,6 +1427,10 @@ gst_ffmpegviddec_handle_frame (GstVideoDecoder * decoder,
return GST_FLOW_ERROR;
}
/* treat frame as void until a buffer is requested for it */
GST_VIDEO_CODEC_FRAME_FLAG_SET (frame,
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
bdata = minfo.data;
bsize = minfo.size;