From: rcombs <rco...@rcombs.me>
The VideoToolbox hwaccel needs the entire NAL (including the stop bit),
but ff_h2645_packet_split may remove it. Detect this case by looking for
bit counts divisible by 8 and insert a stop-bit-only 0x80 byte.
Signed-off-by: rcombs <rco...@rcombs.me>
---
libavcodec/h264_ps.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/libavcodec/h264_ps.c b/libavcodec/h264_ps.c
index 051f06692c..e16da68dec 100644
--- a/libavcodec/h264_ps.c
+++ b/libavcodec/h264_ps.c
@@ -351,6 +351,10 @@ int ff_h264_decode_seq_parameter_set(GetBitContext *gb,
AVCodecContext *avctx,
}
memcpy(sps->data, gb->buffer, sps->data_size);
+ // Re-add the removed stop bit (may be used by hwaccels).
+ if (!(gb->size_in_bits & 7) && sps->data_size < sizeof(sps->data))
+ sps->data[sps->data_size++] = 0x80;
+
profile_idc = get_bits(gb, 8);
constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
@@ -775,6 +779,10 @@ int ff_h264_decode_picture_parameter_set(GetBitContext
*gb, AVCodecContext *avct
}
memcpy(pps->data, gb->buffer, pps->data_size);
+ // Re-add the removed stop bit (may be used by hwaccels).
+ if (!(bit_length & 7) && pps->data_size < sizeof(pps->data))
+ pps->data[pps->data_size++] = 0x80;
+
pps->sps_id = get_ue_golomb_31(gb);
if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
!ps->sps_list[pps->sps_id]) {
--
ffmpeg-codebot
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