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prores: Extend the padding check to 16bit

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Some files produced by the official encoder have up to 16bit of
padding instead of the expected padding to the byte.

Use a self-explanatory macro instead of a simple number.

CC: libav-stable@libav.org

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Luca Barbato 2015-02-25 15:29:15 +01:00
parent 4f6cd883f0
commit dbc1163b20
1 changed files with 3 additions and 2 deletions
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5
libavcodec/proresdec.c
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@ -365,6 +365,7 @@ static inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out,
}
}
#define MAX_PADDING 16
/**
* Decode AC coefficients for all blocks in a slice.
@ -389,7 +390,7 @@ static inline int decode_ac_coeffs(GetBitContext *gb, int16_t *out,
lev_cb_index = ff_prores_lev_to_cb_index[FFMIN(level, 9)];
bits_left = get_bits_left(gb);
if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
if (bits_left <= 0 || (bits_left <= MAX_PADDING && !show_bits(gb, bits_left)))
return 0;
run = decode_vlc_codeword(gb, ff_prores_ac_codebook[run_cb_index]);
@ -397,7 +398,7 @@ static inline int decode_ac_coeffs(GetBitContext *gb, int16_t *out,
return AVERROR_INVALIDDATA;
bits_left = get_bits_left(gb);
if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
if (bits_left <= 0 || (bits_left <= MAX_PADDING && !show_bits(gb, bits_left)))
return AVERROR_INVALIDDATA;
level = decode_vlc_codeword(gb, ff_prores_ac_codebook[lev_cb_index]) + 1;