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Merge remote-tracking branch 'qatar/master'

Browse Source 
* qatar/master:
  lavf: fix signed overflow in avformat_find_stream_info()
  vp8: fix signed overflows
  motion_est: fix some signed overflows
  dca: fix signed overflow in shift
  aacdec: fix undefined shifts
  bink: Check for various out of bound writes
  bink: Check for out of bound writes when building tree
  put_bits: fix invalid shift by 32 in flush_put_bits()

Conflicts:
	libavcodec/bink.c
	libavformat/utils.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-10-09 04:02:03 +02:00
commit c5db8b4d09
7 changed files with 15 additions and 12 deletions
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4
libavcodec/aacdec.c
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@ -1131,7 +1131,7 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
GET_VLC(code, re, gb, vlc_tab, 8, 2);
cb_idx = cb_vector_idx[code];
nnz = cb_idx >> 8 & 15;
bits = SHOW_UBITS(re, gb, nnz) << (32-nnz);
bits = nnz ? GET_CACHE(re, gb) : 0;
LAST_SKIP_BITS(re, gb, nnz);
cf = VMUL4S(cf, vq, cb_idx, bits, sf + idx);
} while (len -= 4);
@ -1171,7 +1171,7 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
GET_VLC(code, re, gb, vlc_tab, 8, 2);
cb_idx = cb_vector_idx[code];
nnz = cb_idx >> 8 & 15;
sign = SHOW_UBITS(re, gb, nnz) << (cb_idx >> 12);
sign = nnz ? SHOW_UBITS(re, gb, nnz) << (cb_idx >> 12) : 0;
LAST_SKIP_BITS(re, gb, nnz);
cf = VMUL2S(cf, vq, cb_idx, sign, sf + idx);
} while (len -= 2);

4
libavcodec/bink.c
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@ -458,8 +458,8 @@ static int read_dcs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b,
int start_bits, int has_sign)
{
int i, j, len, len2, bsize, sign, v, v2;
int16_t *dst = (int16_t*)b->cur_dec;
int16_t *dst_end =( int16_t*)b->data_end;
int16_t *dst = (int16_t*)b->cur_dec;
int16_t *dst_end = (int16_t*)b->data_end;
CHECK_READ_VAL(gb, b, len);
v = get_bits(gb, start_bits - has_sign);

3
libavcodec/dca.c
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@ -909,7 +909,8 @@ static void qmf_32_subbands(DCAContext * s, int chans,
for (subindex = 0; subindex < 8; subindex++) {
/* Load in one sample from each subband and clear inactive subbands */
for (i = 0; i < sb_act; i++){
uint32_t v = AV_RN32A(&samples_in[i][subindex]) ^ ((i-1)&2)<<30;
unsigned sign = (i - 1) & 2;
uint32_t v = AV_RN32A(&samples_in[i][subindex]) ^ sign << 30;
AV_WN32A(&s->raXin[i], v);
}

4
libavcodec/motion_est.c
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@ -1016,7 +1016,7 @@ void ff_estimate_p_frame_motion(MpegEncContext * s,
/* intra / predictive decision */
pix = c->src[0][0];
sum = s->dsp.pix_sum(pix, s->linesize);
varc = s->dsp.pix_norm1(pix, s->linesize) - (((unsigned)(sum*sum))>>8) + 500;
varc = s->dsp.pix_norm1(pix, s->linesize) - (((unsigned)sum*sum)>>8) + 500;
pic->mb_mean[s->mb_stride * mb_y + mb_x] = (sum+128)>>8;
pic->mb_var [s->mb_stride * mb_y + mb_x] = (varc+128)>>8;
@ -1178,7 +1178,7 @@ void ff_estimate_p_frame_motion(MpegEncContext * s,
if((c->avctx->mb_cmp&0xFF)==FF_CMP_SSE){
intra_score= varc - 500;
}else{
int mean= (sum+128)>>8;
unsigned mean = (sum+128)>>8;
mean*= 0x01010101;
for(i=0; i<16; i++){

3
libavcodec/put_bits.h
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@ -78,7 +78,8 @@ static inline int put_bits_count(PutBitContext *s)
static inline void flush_put_bits(PutBitContext *s)
{
#ifndef BITSTREAM_WRITER_LE
s->bit_buf<<= s->bit_left;
if (s->bit_left < 32)
s->bit_buf<<= s->bit_left;
#endif
while (s->bit_left < 32) {
/* XXX: should test end of buffer */

5
libavcodec/vp8.c
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@ -919,7 +919,8 @@ void intra_predict(VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb,
int mb_x, int mb_y)
{
AVCodecContext *avctx = s->avctx;
int x, y, mode, nnz, tr;
int x, y, mode, nnz;
uint32_t tr;
// for the first row, we need to run xchg_mb_border to init the top edge to 127
// otherwise, skip it if we aren't going to deblock
@ -948,7 +949,7 @@ void intra_predict(VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb,
// from the top macroblock
if (!(!mb_y && avctx->flags & CODEC_FLAG_EMU_EDGE) &&
mb_x == s->mb_width-1) {
tr = tr_right[-1]*0x01010101;
tr = tr_right[-1]*0x01010101u;
tr_right = (uint8_t *)&tr;
}

4
libavformat/utils.c
View File

@ -2435,10 +2435,10 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
}
{
int64_t last = st->info->last_dts;
int64_t duration= pkt->dts - last;
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
double dts= pkt->dts * av_q2d(st->time_base);
int64_t duration= pkt->dts - last;
// if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
// av_log(NULL, AV_LOG_ERROR, "%f\n", dur);