static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE; uint8_t *buf; if(size > INT_MAX || (uint64_t)atom.size > INT_MAX) return -1; buf= av_realloc(st->codec->extradata, size); if(!buf) return -1; st->codec->extradata= buf; buf+= st->codec->extradata_size; st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE; AV_WB32( buf , atom.size + 8); AV_WL32( buf + 4, atom.type); get_buffer(pb, buf + 8, atom.size); return 0; }