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avcodec/prores_kostya: increase bits usage when alpha is used

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Also fix undefined left shift of negative variable.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
2017-06-24 16:34:52 +02:00
parent 22a03c2900
commit 315f51128a
1 changed files with 3 additions and 1 deletions
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4
libavcodec/proresenc_kostya.c
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@@ -358,7 +358,7 @@ static inline void encode_vlc_codeword(PutBitContext *pb, unsigned codebook, int
}
#define GET_SIGN(x) ((x) >> 31)
#define MAKE_CODE(x) (((x) << 1) ^ GET_SIGN(x))
#define MAKE_CODE(x) ((((x)) * 2) ^ GET_SIGN(x))
static void encode_dcs(PutBitContext *pb, int16_t *blocks,
int blocks_per_slice, int scale)
@@ -1206,6 +1206,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
ctx->pictures_per_frame)
break;
ctx->bits_per_mb = ctx->profile_info->br_tab[i];
if (ctx->alpha_bits)
ctx->bits_per_mb *= 20;
} else if (ctx->bits_per_mb < 128) {
av_log(avctx, AV_LOG_ERROR, "too few bits per MB, please set at least 128\n");
return AVERROR_INVALIDDATA;