diff options
Diffstat (limited to 'libavcodec/avpacket.c')
| -rw-r--r-- | libavcodec/avpacket.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c index c51260face..82890c3676 100644 --- a/libavcodec/avpacket.c +++ b/libavcodec/avpacket.c @@ -20,6 +20,7 @@ */ #include "avcodec.h" +#include "libavutil/avassert.h" void av_destruct_packet_nofree(AVPacket *pkt) @@ -71,6 +72,23 @@ void av_shrink_packet(AVPacket *pkt, int size) memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); } +int av_grow_packet(AVPacket *pkt, int grow_by) +{ + void *new_ptr; + av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE); + if (!pkt->size) + return av_new_packet(pkt, grow_by); + if ((unsigned)grow_by > INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)) + return -1; + new_ptr = av_realloc(pkt->data, pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE); + if (!new_ptr) + return AVERROR(ENOMEM); + pkt->data = new_ptr; + pkt->size += grow_by; + memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + return 0; +} + int av_dup_packet(AVPacket *pkt) { if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) { |