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ffmpeg: Allocate new buffer for bitstream filter when buffer shifted

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fix crash with aac_adtstoasc bitstream filter
Fixes Ticket1441

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-08-10 04:33:42 +02:00
parent a0d15027e3
commit 969267482d
1 changed files with 10 additions and 0 deletions
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ffmpeg.c
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@ -534,6 +534,16 @@ static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
&new_pkt.data, &new_pkt.size,
pkt->data, pkt->size,
pkt->flags & AV_PKT_FLAG_KEY);
if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
uint8_t *t = av_malloc(new_pkt.size + FF_INPUT_BUFFER_PADDING_SIZE); //the new should be a subset of the old so cannot overflow
if(t) {
memcpy(t, new_pkt.data, new_pkt.size);
memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
new_pkt.data = t;
a = 1;
} else
a = AVERROR(ENOMEM);
}
if (a > 0) {
av_free_packet(pkt);
new_pkt.destruct = av_destruct_packet;