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v4l2slh264dec: Wait on previous pending request in slice mode

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In slice mode, we'll do one request per slice. In order to recycle
bitstream buffer, and not run-out, wait for the last pending
request to complete and mark it done.

We only wait after having queued the current slice in order to reduce
that potential driver starvation and maintain performance (using dual
buffering).

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1395>
This commit is contained in:
Nicolas Dufresne 2020-06-29 13:27:32 -04:00
parent b20c6fe6c4
commit a2eb1b57ff
1 changed files with 13 additions and 3 deletions
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16
sys/v4l2codecs/gstv4l2codech264dec.c
View file

@ -948,7 +948,7 @@ gst_v4l2_codec_h264_dec_submit_bitstream (GstV4l2CodecH264Dec * self,
GstH264Picture * picture, guint flags)
{
GstVideoCodecFrame *frame;
GstV4l2Request *request;
GstV4l2Request *prev_request, *request;
gsize bytesused;
gboolean ret = FALSE;
@ -990,8 +990,6 @@ gst_v4l2_codec_h264_dec_submit_bitstream (GstV4l2CodecH264Dec * self,
goto done;
}
gst_h264_picture_set_user_data (picture, request,
(GDestroyNotify) gst_v4l2_request_free);
frame = gst_video_decoder_get_frame (GST_VIDEO_DECODER (self),
picture->system_frame_number);
@ -1026,10 +1024,22 @@ gst_v4l2_codec_h264_dec_submit_bitstream (GstV4l2CodecH264Dec * self,
goto done;
}
prev_request = gst_h264_picture_get_user_data (picture);
if (prev_request) {
if (!gst_v4l2_codec_h264_dec_wait (self, prev_request))
goto done;
gst_v4l2_request_set_done (prev_request);
}
gst_h264_picture_set_user_data (picture, g_steal_pointer (&request),
(GDestroyNotify) gst_v4l2_request_free);
ret = TRUE;
done:
if (request)
gst_v4l2_request_free (request);
gst_v4l2_codec_h264_dec_reset_picture (self);
return ret;
}