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libs: decoder: h265: skip all pictures prior the first I-frame

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Don't try to decode until the first I-frame is received within the
currently active sequence. i965 H265 decoder don't show any artifact
but it crashes.

Fixes: #98
This commit is contained in:
Víctor Manuel Jáquez Leal 2019-11-03 17:59:01 +01:00 committed by GStreamer Merge Bot
parent 6fb5387d5b
commit 1168d6d548
1 changed files with 23 additions and 1 deletions
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24
gst-libs/gst/vaapi/gstvaapidecoder_h265.c
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@ -334,6 +334,8 @@ typedef enum
GST_H265_VIDEO_STATE_GOT_SPS = 1 << 1,
GST_H265_VIDEO_STATE_GOT_PPS = 1 << 2,
GST_H265_VIDEO_STATE_GOT_SLICE = 1 << 3,
GST_H265_VIDEO_STATE_GOT_I_FRAME = 1 << 4, /* persistent across SPS */
GST_H265_VIDEO_STATE_GOT_P_SLICE = 1 << 5, /* predictive (all non-intra) */
GST_H265_VIDEO_STATE_VALID_PICTURE_HEADERS =
(GST_H265_VIDEO_STATE_GOT_SPS | GST_H265_VIDEO_STATE_GOT_PPS),
@ -583,6 +585,11 @@ ensure_sps (GstVaapiDecoderH265 * decoder, GstH265SPS * sps)
GstVaapiDecoderH265Private *const priv = &decoder->priv;
GstVaapiParserInfoH265 *const pi = priv->sps[sps->id];
/* Propagate "got I-frame" state to the next SPS unit if the current
* sequence was not ended */
if (pi && priv->active_sps)
pi->state |= (priv->active_sps->state & GST_H265_VIDEO_STATE_GOT_I_FRAME);
gst_vaapi_parser_info_h265_replace (&priv->active_sps, pi);
return pi ? &pi->data.sps : NULL;
}
@ -1317,12 +1324,20 @@ static GstVaapiDecoderStatus
decode_current_picture (GstVaapiDecoderH265 * decoder)
{
GstVaapiDecoderH265Private *const priv = &decoder->priv;
GstVaapiParserInfoH265 *const sps_pi = decoder->priv.active_sps;
GstVaapiPictureH265 *const picture = priv->current_picture;
if (!is_valid_state (priv->decoder_state, GST_H265_VIDEO_STATE_VALID_PICTURE)) {
goto drop_frame;
}
priv->decoder_state |= sps_pi->state;
if (!(priv->decoder_state & GST_H265_VIDEO_STATE_GOT_I_FRAME)) {
if (priv->decoder_state & GST_H265_VIDEO_STATE_GOT_P_SLICE)
goto drop_frame;
sps_pi->state |= GST_H265_VIDEO_STATE_GOT_I_FRAME;
}
priv->decoder_state = 0;
/* FIXME: Use SEI header values */
priv->pic_structure = GST_VAAPI_PICTURE_STRUCTURE_FRAME;
@ -1459,6 +1474,8 @@ parse_slice (GstVaapiDecoderH265 * decoder, GstVaapiDecoderUnit * unit)
return get_status (result);
priv->parser_state |= GST_H265_VIDEO_STATE_GOT_SLICE;
if (!GST_H265_IS_I_SLICE (slice_hdr))
priv->parser_state |= GST_H265_VIDEO_STATE_GOT_P_SLICE;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
@ -1548,9 +1565,15 @@ static GstVaapiDecoderStatus
decode_sequence_end (GstVaapiDecoderH265 * decoder)
{
GstVaapiDecoderStatus status;
GstVaapiParserInfoH265 *const sps_pi = decoder->priv.active_sps;
GST_DEBUG ("decode sequence-end");
/* Sequence ended, don't try to propagate "got I-frame" state beyond
* this point */
if (sps_pi)
sps_pi->state &= ~GST_H265_VIDEO_STATE_GOT_I_FRAME;
status = decode_current_picture (decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
@ -2718,7 +2741,6 @@ decode_slice (GstVaapiDecoderH265 * decoder, GstVaapiDecoderUnit * unit)
gst_vaapi_picture_add_slice (GST_VAAPI_PICTURE_CAST (picture), slice);
picture->last_slice_hdr = slice_hdr;
priv->decoder_state |= GST_H265_VIDEO_STATE_GOT_SLICE;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}