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avcodec/cbs_mpeg2: create a reference to the existing buffer when decomposing slice units

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Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2018-04-27 19:08:42 -03:00
parent e3866ea20d
commit 65d36473c9
1 changed files with 2 additions and 7 deletions
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9
libavcodec/cbs_mpeg2.c
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@ -191,16 +191,11 @@ static int cbs_mpeg2_read_unit(CodedBitstreamContext *ctx,
len = unit->data_size;
slice->data_size = len - pos / 8;
slice->data_ref = av_buffer_alloc(slice->data_size +
AV_INPUT_BUFFER_PADDING_SIZE);
slice->data_ref = av_buffer_ref(unit->data_ref);
if (!slice->data_ref)
return AVERROR(ENOMEM);
slice->data = slice->data_ref->data;
slice->data = unit->data + pos / 8;
memcpy(slice->data,
unit->data + pos / 8, slice->data_size);
memset(slice->data + slice->data_size, 0,
AV_INPUT_BUFFER_PADDING_SIZE);
slice->data_bit_start = pos % 8;
} else {