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v4l2slh264dec: Prevent spurious renegotiation

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Don't let downstream cause a renegotiation at random point in time. This would
lead to spurious renegotiation and the decoder state may not be recoverable.
This commit is contained in:
Nicolas Dufresne 2020-03-09 16:44:19 -04:00
parent b47929a74d
commit f6690420ce
1 changed files with 7 additions and 0 deletions
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7
sys/v4l2codecs/gstv4l2codech264dec.c
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@ -65,6 +65,7 @@ struct _GstV4l2CodecH264Dec
GstV4l2CodecPool *src_pool;
gint min_pool_size;
gboolean has_videometa;
gboolean need_negotiation;
struct v4l2_ctrl_h264_sps sps;
struct v4l2_ctrl_h264_pps pps;
@ -137,6 +138,11 @@ gst_v4l2_codec_h264_dec_negotiate (GstVideoDecoder * decoder)
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
GstH264Decoder *h264dec = GST_H264_DECODER (decoder);
/* Ignore downstream renegotiation request. */
if (!self->need_negotiation)
return TRUE;
self->need_negotiation = FALSE;
GST_DEBUG_OBJECT (self, "Negotiate");
if (self->sink_allocator)
@ -449,6 +455,7 @@ gst_v4l2_codec_h264_dec_new_sequence (GstH264Decoder * decoder,
gst_v4l2_codec_h264_dec_fill_sequence (self, sps);
if (negotiation_needed) {
self->need_negotiation = TRUE;
if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (self))) {
GST_ERROR_OBJECT (self, "Failed to negotiate with downstream");
return FALSE;