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mlpdec: Check for bits left before each read of End-of-Stream indicator and

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Substream parity check independently. This allows decoding of streams that
have EOS but don't have Substream parity check.

Originally committed as revision 14206 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ramiro Polla
2008-07-13 14:59:39 +00:00
parent f27e1d645e
commit eb2cd99c73
1 changed files with 3 additions and 2 deletions
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5
libavcodec/mlpdec.c
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@ -1119,7 +1119,7 @@ static int read_access_unit(AVCodecContext *avctx, void* data, int *data_size,
&& get_bits1(&gb) == 0); && get_bits1(&gb) == 0);
skip_bits(&gb, (-get_bits_count(&gb)) & 15); skip_bits(&gb, (-get_bits_count(&gb)) & 15);
if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 48 && if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32 &&
(show_bits_long(&gb, 32) == 0xd234d234 || (show_bits_long(&gb, 32) == 0xd234d234 ||
show_bits_long(&gb, 20) == 0xd234e)) { show_bits_long(&gb, 20) == 0xd234e)) {
skip_bits(&gb, 18); skip_bits(&gb, 18);
@ -1133,7 +1133,8 @@ static int read_access_unit(AVCodecContext *avctx, void* data, int *data_size,
} else } else
skip_bits(&gb, 13); skip_bits(&gb, 13);
} }
if (substream_parity_present[substr]) { if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 16 &&
substream_parity_present[substr]) {
uint8_t parity, checksum; uint8_t parity, checksum;
parity = calculate_parity(buf, substream_data_len[substr] - 2); parity = calculate_parity(buf, substream_data_len[substr] - 2);