[FFmpeg-devel] h264 crash in decode_residual

[Gadi Bergman]

Hello Michael, team members and readers,
I am decoding streams generated by an h264 proprietary encoder using FFMPEG h264 decoder from MPlayer 1.0rc1.
I get often a crash in function decode_residual:
static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
MpegEncContext * const s = &h->s;
static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3};
int level[16];
int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before;
if(n == CHROMA_DC_BLOCK_INDEX){
coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
total_coeff= coeff_token>>2;
}else{
if(n == LUMA_DC_BLOCK_INDEX){
total_coeff= pred_non_zero_count(h, 0);
coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
total_coeff= coeff_token>>2;
}else{
total_coeff= pred_non_zero_count(h, n);

/* here I get total_coeff == 31 */
/* coeff_token_table_index[total_coeff] is not not defined for this index */
/* I get a crash in the next line */

coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
total_coeff= coeff_token>>2;
h->non_zero_count_cache[ scan8[n] ]= total_coeff;
}
}
Any recommendations?
Should I extend coeff_token_table_index with more 3's for a size of 32 ?
Thanks,
Gadi
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