Commit 4997acdf authored by Thomas Guillem's avatar Thomas Guillem

codec: videotoolbox: fix BadDataErr when decoding HEVC

Cf. comment.

This fixes playback on TS files that have only CRA (and no IDR) frames.
This also improves seek speed on all other files (since you could start with a
CRA frame when seeking).
parent 34afe5e2
......@@ -181,6 +181,7 @@ struct decoder_sys_t
h264_poc_context_t h264_pocctx;
hevc_poc_ctx_t hevc_pocctx;
bool b_drop_blocks;
date_t pts;
struct pic_holder *pic_holder;
......@@ -647,6 +648,25 @@ static bool FillReorderInfoHEVC(decoder_t *p_dec, const block_t *p_block,
if(!p_sli)
return false;
/* XXX: Work-around a VT bug on recent devices (iPhone X, MacBook
* Pro 2017). The VT session will report a BadDataErr if you send a
* RASL frame just after a CRA one. Indeed, RASL frames are
* corrupted if the decoding start at an IRAP frame (IDR/CRA), VT
* is likely failing to handle this case. */
if (!p_sys->b_vt_feed && (i_nal_type != HEVC_NAL_IDR_W_RADL &&
i_nal_type != HEVC_NAL_IDR_N_LP))
p_sys->b_drop_blocks = true;
else if (p_sys->b_drop_blocks)
{
if (i_nal_type == HEVC_NAL_RASL_N || i_nal_type == HEVC_NAL_RASL_R)
{
hevc_rbsp_release_slice_header(p_sli);
return false;
}
else
p_sys->b_drop_blocks = false;
}
p_info->b_keyframe = i_nal_type >= HEVC_NAL_BLA_W_LP;
hevc_sequence_parameter_set_t *p_sps;
......@@ -1298,6 +1318,7 @@ static void StopVideoToolbox(decoder_t *p_dec)
p_sys->videoFormatDescription = nil;
}
p_sys->b_vt_feed = false;
p_sys->b_drop_blocks = false;
}
#pragma mark - module open and close
......@@ -1784,6 +1805,7 @@ static void Drain(decoder_t *p_dec, bool flush)
assert(RemoveOneFrameFromDPB(p_sys) == NULL);
p_sys->b_vt_flush = false;
p_sys->b_vt_feed = false;
p_sys->b_drop_blocks = false;
vlc_mutex_unlock(&p_sys->lock);
}
......
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